Determination, by measurement or comparison with a standard, of the correct value of each scale reading on a meter or other measuring instrument; or determination of the settings of a control device that correspond to particular values of voltage, current, frequency or other output.
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
A basis of value established for the measure of quantity, weight, extent or quality, e.g. weight standards, standard solutions, methods, techniques, and procedures used in diagnosis and therapy.
Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)
A system for verifying and maintaining a desired level of quality in a product or process by careful planning, use of proper equipment, continued inspection, and corrective action as required. (Random House Unabridged Dictionary, 2d ed)
Methods of creating machines and devices.
A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.
The evaluation of incidents involving the loss of function of a device. These evaluations are used for a variety of purposes such as to determine the failure rates, the causes of failures, costs of failures, and the reliability and maintainability of devices.
Remains, impressions, or traces of animals or plants of past geological times which have been preserved in the earth's crust.
Devices or objects in various imaging techniques used to visualize or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with x-ray or ultrasonic machines. (From Iturralde, Dictionary and Handbook of Nuclear Medicine and Clinical Imaging, 1990)
Concentration or quantity that is derived from the smallest measure that can be detected with reasonable certainty for a given analytical procedure.
The analysis of a chemical substance by inserting a sample into a carrier stream of reagent using a sample injection valve that propels the sample downstream where mixing occurs in a coiled tube, then passes into a flow-through detector and a recorder or other data handling device.
Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.
Statistical formulations or analyses which, when applied to data and found to fit the data, are then used to verify the assumptions and parameters used in the analysis. Examples of statistical models are the linear model, binomial model, polynomial model, two-parameter model, etc.
Method of analyzing chemicals using automation.
Methodologies used for the isolation, identification, detection, and quantitation of chemical substances.
Any device or element which converts an input signal into an output signal of a different form. Examples include the microphone, phonographic pickup, loudspeaker, barometer, photoelectric cell, automobile horn, doorbell, and underwater sound transducer. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)
Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant & Hackh's Chemical Dictionary, 5th ed, p301, p499)
A noninvasive technique that uses the differential absorption properties of hemoglobin and myoglobin to evaluate tissue oxygenation and indirectly can measure regional hemodynamics and blood flow. Near-infrared light (NIR) can propagate through tissues and at particular wavelengths is differentially absorbed by oxygenated vs. deoxygenated forms of hemoglobin and myoglobin. Illumination of intact tissue with NIR allows qualitative assessment of changes in the tissue concentration of these molecules. The analysis is also used to determine body composition.
Lack of correspondence between the way a stimulus is commonly perceived and the way an individual perceives it under given conditions.
Measuring and weighing systems and processes.
A principle of estimation in which the estimates of a set of parameters in a statistical model are those quantities minimizing the sum of squared differences between the observed values of a dependent variable and the values predicted by the model.
Theoretical representations that simulate the behavior or activity of systems, processes, or phenomena. They include the use of mathematical equations, computers, and other electronic equipment.
Graphical representation of a statistical model containing scales for calculating the prognostic weight of a value for each individual variable. Nomograms are instruments that can be used to predict outcomes using specific clinical parameters. They use ALGORITHMS that incorporate several variables to calculate the predicted probability that a patient will achieve a particular clinical endpoint.
Any of a variety of procedures which use biomolecular probes to measure the presence or concentration of biological molecules, biological structures, microorganisms, etc., by translating a biochemical interaction at the probe surface into a quantifiable physical signal.
The measurement of radiation by photography, as in x-ray film and film badge, by Geiger-Mueller tube, and by SCINTILLATION COUNTING.
A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compounds.
Chromatographic techniques in which the mobile phase is a liquid.
Electric conductors through which electric currents enter or leave a medium, whether it be an electrolytic solution, solid, molten mass, gas, or vacuum.
The use of electronic equipment to observe or record physiologic processes while the patient undergoes normal daily activities.
A mass spectrometry technique using two (MS/MS) or more mass analyzers. With two in tandem, the precursor ions are mass-selected by a first mass analyzer, and focused into a collision region where they are then fragmented into product ions which are then characterized by a second mass analyzer. A variety of techniques are used to separate the compounds, ionize them, and introduce them to the first mass analyzer. For example, for in GC-MS/MS, GAS CHROMATOGRAPHY-MASS SPECTROMETRY is involved in separating relatively small compounds by GAS CHROMATOGRAPHY prior to injecting them into an ionization chamber for the mass selection.
A technique using antibodies for identifying or quantifying a substance. Usually the substance being studied serves as antigen both in antibody production and in measurement of antibody by the test substance.
Behavior of LIGHT and its interactions with itself and materials.
A mass spectrometry technique used for analysis of nonvolatile compounds such as proteins and macromolecules. The technique involves preparing electrically charged droplets from analyte molecules dissolved in solvent. The electrically charged droplets enter a vacuum chamber where the solvent is evaporated. Evaporation of solvent reduces the droplet size, thereby increasing the coulombic repulsion within the droplet. As the charged droplets get smaller, the excess charge within them causes them to disintegrate and release analyte molecules. The volatilized analyte molecules are then analyzed by mass spectrometry.
Any visible result of a procedure which is caused by the procedure itself and not by the entity being analyzed. Common examples include histological structures introduced by tissue processing, radiographic images of structures that are not naturally present in living tissue, and products of chemical reactions that occur during analysis.
A graphic means for assessing the ability of a screening test to discriminate between healthy and diseased persons; may also be used in other studies, e.g., distinguishing stimuli responses as to a faint stimuli or nonstimuli.
Method of tissue preparation in which the tissue specimen is frozen and then dehydrated at low temperature in a high vacuum. This method is also used for dehydrating pharmaceutical and food products.
Clotting time of PLASMA recalcified in the presence of excess TISSUE THROMBOPLASTIN. Factors measured are FIBRINOGEN; PROTHROMBIN; FACTOR V; FACTOR VII; and FACTOR X. It is used for monitoring anticoagulant therapy with COUMARINS.
Determination of the spectra of ultraviolet absorption by specific molecules in gases or liquids, for example Cl2, SO2, NO2, CS2, ozone, mercury vapor, and various unsaturated compounds. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A barbiturate that is used as a sedative. Secobarbital is reported to have no anti-anxiety activity.
Statistical models in which the value of a parameter for a given value of a factor is assumed to be equal to a + bx, where a and b are constants. The models predict a linear regression.
Improvement in the quality of an x-ray image by use of an intensifying screen, tube, or filter and by optimum exposure techniques. Digital processing methods are often employed.
A theorem in probability theory named for Thomas Bayes (1702-1761). In epidemiology, it is used to obtain the probability of disease in a group of people with some characteristic on the basis of the overall rate of that disease and of the likelihood of that characteristic in healthy and diseased individuals. The most familiar application is in clinical decision analysis where it is used for estimating the probability of a particular diagnosis given the appearance of some symptoms or test result.
An extraction method that separates analytes using a solid phase and a liquid phase. It is used for preparative sample cleanup before analysis by CHROMATOGRAPHY and other analytical methods.
Thin strands of transparent material, usually glass, that are used for transmitting light waves over long distances.
A rare metal element with a blue-gray appearance and atomic symbol Ge, atomic number 32, and atomic weight 72.63.
Computer-based representation of physical systems and phenomena such as chemical processes.
The narrow passage way that conducts the sound collected by the EAR AURICLE to the TYMPANIC MEMBRANE.
Elements of limited time intervals, contributing to particular results or situations.
Use of a device (film badge) for measuring exposure of individuals to radiation. It is usually made of metal, plastic, or paper and loaded with one or more pieces of x-ray film.
Chemical analysis based on the phenomenon whereby light, passing through a medium with dispersed particles of a different refractive index from that of the medium, is attenuated in intensity by scattering. In turbidimetry, the intensity of light transmitted through the medium, the unscattered light, is measured. In nephelometry, the intensity of the scattered light is measured, usually, but not necessarily, at right angles to the incident light beam.
The spontaneous transformation of a nuclide into one or more different nuclides, accompanied by either the emission of particles from the nucleus, nuclear capture or ejection of orbital electrons, or fission. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Drugs intended for human or veterinary use, presented in their finished dosage form. Included here are materials used in the preparation and/or formulation of the finished dosage form.
An analytical method used in determining the identity of a chemical based on its mass using mass analyzers/mass spectrometers.
The chemical and physical integrity of a pharmaceutical product.
An increase in the rate of speed.
The condition in which reasonable knowledge regarding risks, benefits, or the future is not available.
The development and use of techniques and equipment to study or perform chemical reactions, with small quantities of materials, frequently less than a milligram or a milliliter.
The visual display of data in a man-machine system. An example is when data is called from the computer and transmitted to a CATHODE RAY TUBE DISPLAY or LIQUID CRYSTAL display.
Measuring instruments for determining the temperature of matter. Most thermometers used in the field of medicine are designed for measuring body temperature or for use in the clinical laboratory. (From UMDNS, 1999)
Procedures for finding the mathematical function which best describes the relationship between a dependent variable and one or more independent variables. In linear regression (see LINEAR MODELS) the relationship is constrained to be a straight line and LEAST-SQUARES ANALYSIS is used to determine the best fit. In logistic regression (see LOGISTIC MODELS) the dependent variable is qualitative rather than continuously variable and LIKELIHOOD FUNCTIONS are used to find the best relationship. In multiple regression, the dependent variable is considered to depend on more than a single independent variable.
A technique of inputting two-dimensional images into a computer and then enhancing or analyzing the imagery into a form that is more useful to the human observer.
Application of statistical procedures to analyze specific observed or assumed facts from a particular study.
Agents that emit light after excitation by light. The wave length of the emitted light is usually longer than that of the incident light. Fluorochromes are substances that cause fluorescence in other substances, i.e., dyes used to mark or label other compounds with fluorescent tags.
The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.
Laboratory tests demonstrating the presence of physiologically significant substances in the blood, urine, tissue, and body fluids with application to the diagnosis or therapy of disease.
An examination of chemicals in the blood.
Materials used as reference points for imaging studies.
The specialty of ANALYTIC CHEMISTRY applied to assays of physiologically important substances found in blood, urine, tissues, and other biological fluids for the purpose of aiding the physician in making a diagnosis or following therapy.
X-ray image-detecting devices that make a focused image of body structures lying in a predetermined plane from which more complex images are computed.
A specialized field of physics and engineering involved in studying the behavior and properties of light and the technology of analyzing, generating, transmitting, and manipulating ELECTROMAGNETIC RADIATION in the visible, infrared, and ultraviolet range.
Making measurements by the use of stereoscopic photographs.
The study of chemical changes resulting from electrical action and electrical activity resulting from chemical changes.
The qualitative or quantitative estimation of the likelihood of adverse effects that may result from exposure to specified health hazards or from the absence of beneficial influences. (Last, Dictionary of Epidemiology, 1988)
The relationships of groups of organisms as reflected by their genetic makeup.
That portion of the electromagnetic spectrum usually sensed as heat. Infrared wavelengths are longer than those of visible light, extending into the microwave frequencies. They are used therapeutically as heat, and also to warm food in restaurants.
The branch of physics that deals with sound and sound waves. In medicine it is often applied in procedures in speech and hearing studies. With regard to the environment, it refers to the characteristics of a room, auditorium, theatre, building, etc. that determines the audibility or fidelity of sounds in it. (From Random House Unabridged Dictionary, 2d ed)
Solid dosage forms, of varying weight, size, and shape, which may be molded or compressed, and which contain a medicinal substance in pure or diluted form. (Dorland, 28th ed)
Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.
Methods for assessing flow through a system by injection of a known quantity of an indicator, such as a dye, radionuclide, or chilled liquid, into the system and monitoring its concentration over time at a specific point in the system. (From Dorland, 28th ed)

Validation of the Rockall risk scoring system in upper gastrointestinal bleeding. (1/3865)

BACKGROUND: Several scoring systems have been developed to predict the risk of rebleeding or death in patients with upper gastrointestinal bleeding (UGIB). These risk scoring systems have not been validated in a new patient population outside the clinical context of the original study. AIMS: To assess internal and external validity of a simple risk scoring system recently developed by Rockall and coworkers. METHODS: Calibration and discrimination were assessed as measures of validity of the scoring system. Internal validity was assessed using an independent, but similar patient sample studied by Rockall and coworkers, after developing the scoring system (Rockall's validation sample). External validity was assessed using patients admitted to several hospitals in Amsterdam (Vreeburg's validation sample). Calibration was evaluated by a chi2 goodness of fit test, and discrimination was evaluated by calculating the area under the receiver operating characteristic (ROC) curve. RESULTS: Calibration indicated a poor fit in both validation samples for the prediction of rebleeding (p<0.0001, Vreeburg; p=0.007, Rockall), but a better fit for the prediction of mortality in both validation samples (p=0.2, Vreeburg; p=0.3, Rockall). The areas under the ROC curves were rather low in both validation samples for the prediction of rebleeding (0.61, Vreeburg; 0.70, Rockall), but higher for the prediction of mortality (0.73, Vreeburg; 0.81, Rockall). CONCLUSIONS: The risk scoring system developed by Rockall and coworkers is a clinically useful scoring system for stratifying patients with acute UGIB into high and low risk categories for mortality. For the prediction of rebleeding, however, the performance of this scoring system was unsatisfactory.  (+info)

Performance and specificity of monoclonal immunoassays for cyclosporine monitoring: how specific is specific? (2/3865)

BACKGROUND: Immunoassays designed for the selective measurement of cyclosporin A (CsA) inadvertently show cross-reactivity for CsA metabolites. The extent and clinical significance of the resulting overestimation is controversial. A comprehensive assessment of old and new methods in clinical specimens is needed. METHODS: In a comprehensive evaluation, CsA was analyzed in 145 samples with the new CEDIA assay and compared with the Emit assay with the old and new pretreatments, the TDx monoclonal and polyclonal assays, the AxSYM, and HPLC. All samples were from patients with liver and/or kidney transplants. RESULTS: The CEDIA offered the easiest handling, followed by the AxSYM, which showed the longest calibration stability. The TDx monoclonal assay provided the lowest detection limit and the lowest CVs. The mean differences compared with HPLC were as follows: Emit, 9-12%; CEDIA, 18%; AxSYM, 29%; and TDx monoclonal, 57%. The CycloTrac RIA paralleled the Emit results. In contrast to the mean differences, substantial (>200%) and variable overestimations of the CsA concentration were observed in individual patient samples. Metabolic ratios, estimates of the overall concentrations of several cross-reacting metabolites (nonspecific TDx polyclonal/specific reference method), correlated with the apparent biases of the various monoclonal assays. Metabolic ratios varied up to 10-fold, which translated into biases for individual samples between -7% and +174%. The higher the cross-reactivity of an assay was, the higher was the range of biases observed. The interindividual differences markedly exceeded other factors of influence (organ transplanted, hepatic function). CONCLUSION: Because assay bias cannot be predicted in individual samples, substantially erratic CsA dosing can result. The specificity of CsA assays for parent CsA remains a major concern.  (+info)

TE671 cell-based ELISA for anti-acetylcholine receptor antibody determination in myasthenia gravis. (3/3865)

BACKGROUND: Acetylcholine receptor (AChR) from human muscles is the antigen used currently in radioimmunoprecipitation assays (RIPAs) for the determination of anti-AChR antibodies in the diagnosis of myasthenia gravis (MG). Our aim was to develop and validate an ELISA using TE671 cells as the source of AChR. METHODS: After TE671 cell homogenization, the crude AChR extract was used for plate coating. Anti-AChR antibodies were determined in 207 MG patients and in 77 controls. RESULTS: The mean intra- and interassay CVs (for two samples with different anti-AChR antibody concentrations) were 9.7% and 15.7%, respectively. Test sensitivity and specificity, for generalized MG, were 79.5% (95% confidence interval, 72.8-85.0%) and 96.1% (89.0-99.1%). The detection limit was 2 nmol/L. Anti-AChR antibody concentrations from 53 MG patients, as tested with our ELISA, showed good agreement with an RIPA with a mean difference (SD) of 1.0 (5.6) nmol/L. CONCLUSION: Our ELISA is a simple screening test for the diagnosis of MG and enables rapid and inexpensive patient follow-up.  (+info)

LocaLisa: new technique for real-time 3-dimensional localization of regular intracardiac electrodes. (4/3865)

BACKGROUND: Estimation of the 3-dimensional (3D) position of ablation electrodes from fluoroscopic images is inadequate if a systematic lesion pattern is required in the treatment of complex arrhythmogenic substrates. METHODS AND RESULTS: We developed a new technique for online 3D localization of intracardiac electrodes. Regular catheter electrodes are used as sensors for a high-frequency transthoracic electrical field, which is applied via standard skin electrodes. We investigated localization accuracy within the right atrium, right ventricle, and left ventricle by comparing measured and true interelectrode distances of a decapolar catheter. Long-term stability was analyzed by localization of the most proximal His bundle before and after slow pathway ablation. Electrogram recordings were unaffected by the applied electrical field. Localization data from 3 catheter positions, widely distributed within the right atrium, right ventricle, or left ventricle, were analyzed in 10 patients per group. The relationship between measured and true electrode positions was highly linear, with an average correlation coefficient of 0.996, 0.997, and 0.999 for the right atrium, right ventricle, and left ventricle, respectively. Localization accuracy was better than 2 mm, with an additional scaling error of 8% to 14%. After 2 hours, localization of the proximal His bundle was reproducible within 1.4+/-1.1 mm. CONCLUSIONS: This new technique enables accurate and reproducible real-time localization of electrode positions in cardiac mapping and ablation procedures. Its application does not distort the quality of electrograms and can be applied to any electrode catheter.  (+info)

European interlaboratory comparison of breath 13CO2 analysis. (5/3865)

The BIOMED I programme Stable Isotopes in Gastroenterology and Nutrition (SIGN) has focused upon evaluation and standardisation of stable isotope breath tests using 13C labelled substrates. The programme dealt with comparison of 13C substrates, test meals, test conditions, analysis techniques, and calculation procedures. Analytical techniques applied for 13CO2 analysis were evaluated by taking an inventory of instrumentation, calibration protocols, and analysis procedures. Two ring tests were initiated measuring 13C abundances of carbonate materials. Evaluating the data it was found that seven different models of isotope ratio mass spectrometers (IRMS) were used by the participants applying both the dual inlet system and the continuous flow configuration. Eight different brands of certified 13C reference materials were used with a 13C abundance varying from delta 13CPDB -37.2 to +2.0/1000. CO2 was liberated from certified material by three techniques and different working standards were used varying from -47.4 to +0.4/1000 in their delta 13CPDB value. The standard deviations (SDs) found for all measurements by all participants were 0.25/1000 and 0.50/1000 for two carbonates used in the ring tests. The individual variation for the single participants varied from 0.02 /1000 (dual inlet system) to 0.14/1000 (continuous flow system). The measurement of the difference between two carbonates showed a SD of 0.33/1000 calculated for all participants. Internal precision of IRMS as indicated by the specifications of the different instrument suppliers is < 0.3/1000 for continuous flow systems. In this respect it can be concluded that all participants are working well within the instrument specifications even including sample preparation. Increased overall interlaboratory variation is therefore likely to be due to non-instrumental conditions. It is possible that consistent differences in sample handling leading to isotope fractionation are the causes for interlaboratory variation. Breath analysis does not require sample preparation. As such, interlaboratory variation will be less than observed for the carbonate samples and within the range indicated as internal precision for continuous flow instruments. From this it is concluded that pure analytical interlaboratory variation is acceptable despite the many differences in instrumentation and analytical protocols. Coordinated metabolic studies appear possible, in which different European laboratories perform 13CO2 analysis. Evaluation of compatibility of the analytical systems remains advisable, however.  (+info)

The length and eruption rates of incisor teeth in rats after one or more of them had been unimpeded. (6/3865)

The eruption rate and length of all four incisor teeth in rats were measured under ether anaesthesia by recording the position of marks on their labial surfaces at 2-day intervals, using calibrated graticules in microscope eyepieces. The rats were divided into four groups and either a lower, an upper, both a lower and an upper, or no incisors were unimpeded. This paper describes the changes when the unimpeded incisors returned to the occlusion. Neither the unimpeded nor the impeded incisors simply returned to control values immediately the period of unimpeded eruption ended, but showed transient changes in their lengths and eruption rates. The results confirm that eruption rates are determined by the sum of the lengths of the lower and upper incisors, rather than by their own lengths, with longer teeth erupting more slowly. Specifically, restoring the bevel to the incisors did not slow their eruption below normal impeded rates. The slowing of the eruption of the longer of two adjacent incisors was related to the length differences of the incisors in the same jaw, not to the sum of the differences in both jaws. Contact with the contralateral incisor in the opposite jaw slowed the eruption of an incisor more than contact with the ipsilateral incisor.  (+info)

Fluorimetric determination of aluminum traces in hemodialysis solutions using Mordant Red 19. (7/3865)

A sensitive and accurate method for the spectrofluorimetric determination of trace levels of aluminum in hemodialysis solutions using Mordant Red 19 as the complexation reagent has been developed. The optimal experimental conditions for the concentration of fluorimetric reagent, pH, temperature, and the specific type of matrix are reported. The emission of the fluorescent metal chelate was measured at 555 nm, excitation at 478 nm. Linearity between emission intensity and aluminum concentration was found in the 2-20 ppb range in standard aluminum solutions. Limit of detection was 0.4 ppb. The aluminum amounts in some commercial hemodialysis solutions were determined by means of the extrapolation method. The proposed method proved to be suitable in terms of sensitivity and accuracy for the determination of aluminum in dialysis fluids.  (+info)

Determination of tin, vanadium, iron, and molybdenum in various matrices by atomic absorption spectrometry using a simultaneous liquid-liquid extraction procedure. (8/3865)

An atomic-absorption spectrometric method is described for the determination of tin, vanadium, iron, and molybdenum in two certified reference materials, food samples, and petroleum crude. After treatment with acids, these elements are separated from matrix elements by simultaneous solvent extraction of 5,5'-methylenedisalicylohydroxamic acid complexes from HCl/NaClO4 solution into an isobutyl methyl ketone/tributyl phosphate solution. The detection limits range from 0.018 to 0.19 microg/mL (n = 3), and the relative standard deviations do not exceed 2.0% at levels of 0.5, 0.6, 2.0, and 7.0 microg/mL of Fe, Mo, V, and Sn, respectively. The method is selective and suffers only from interference by Zr(IV), Ti(IV), Th(IV), W(VI), PO4(3-), and F-.  (+info)

Accelerometers are used in a variety of applications ranging from navigation systems to stand-alone tests. In each application, the accuracy of the accelerometer is crucial. There are various calibration techniques that range in precision, yet each apparatus devised to calibrate the accelerometer is quite complex. A calibration method of less complexity is desired to calibrate stand-alone accelerometers that require moderate accuracy. One stand-alone accelerometer, the X16-1D, was used to investigate calibration techniques. Six calibration techniques were investigated to determine an efficient method to calibrate a stand-alone accelerometer. Each method provided a different acceleration component that was modeled by theoretical equations. For all six methods, test variables were established to determine the accelerometers ability to track acceleration. Each test was compared to the theoretical acceleration model to determine the effectiveness of the calibration technique. The overall errors of each
A novel method is introduced for developing calibration models for the spectroscopic measurement of chemical concentrations in an aqueous environment. To demonstrate this matrix-enhanced calibration procedure, we developed calibration models to quantitate glucose and glutamine concentrations in an insect cell culture medium that is a complex mixture of more than 20 components, with three components that manifest significant concentration changes. Accurate calibration models were generated for glucose and glutamine by using a calibration data set composed of 60 samples containing the analytes dissolved in an aqueous buffer along with as few as two samples of the analytes dissolved in culture medium. Standard errors of prediction were 1.0 mM for glucose and 0.35 mM for glutamine. The matrix-enhanced method was also applied to culture medium samples collected during the course of a second bioreactor run. Addition of three culture medium samples to a buffer calibration reduced glucose prediction errors from
Two multivariate calibration methods are compared for the simultaneous chromatographic determination and separation of Sulfamethoxazole (SMX) and Phthalazine (PHZ) by High Performance Liquid Chromatography (HPLC). Multivariate calibration techniques such as Classical Least Squares (CLS) and Inverse Least Squares (ILS) were introduced into HPLC to determine the quantification by using UV detector at 235, 250, 260 and 270 nm. Sixteen binary mixtures of SMX and PHZ as calibration set and eight binary mixtures as prediction set were used. Results show that, Relative Errors of Prediction (REP) of CLS and ILS for SMX and PHZ were 0.17%, 0.63% and o.15%, 0.56%, respectively.
Does the 80A03 require any internal calibration? No, the 80A03 requires no internal calibration. However, after installing any electrical sampling module, the compensation procedure should be run. The
We describe a new resist model calibration procedure and its implementation in LithoCruiserTM. In addition to the resist calibration, LithoCruiser is used to perform simultaneous optimization for numerical aperture (NA), mask OPC, and illumination profile with built-in manufacturing constraints for ASML illumination diffractive optical elements (DOE). This calibration procedure uses a global optimization algorithm for resist parameter tuning, matching the simulated and measured 2D resist contours at a user-defined multiple CD sampling across the selected developed 2D resist patterns. Using lumped parameter type resist models and vector high-NA simulation engine, this resist calibration procedure showed an excellent calibration capability of max CD error range < ±4nm for the CPL 70nm DRAM patterns. Calibration results for CPL 130nm contact hole patterns are also included in this manuscript. Dependency of the calibrated model parameters on lithography process (i.e., Quasar, C-Quad illumination ...
An advanced wavelength calibration process with higher wavelength accuracy is developed based on the conventional calibration method of micro-spectrometers with multichannel detectors. The deficiencies of the conventional method in acquiring sufficient well-spaced and adequately accurate wavelength-pixel data for calibration are analyzed. And three steps are added to the conventional method before the final pixel-wavelength fit is carried out. First, segmented data collection is carried out to ensure sufficient well-spaced lines for calibration. Second, sub-pixel analysis is executed to increase sampling rate. Third, peak fit is implemented to acquire more accurate central wavelength positions. The simulated experiment was based on a compact spectrometer with a crossed Czerny-Turner optical design. Mercury and Argon line spectra are used as wavelength standards. A linear image sensor with 1024 pixels each 25μm in width is used as the detector. In the new calibration process the whole spectral ...
Closes an open external calibration session. LabVIEW NXG does not support FPGA devices Not supported in VIs that run in a web application DAQmx Close External Calibration.vi :/lvdaqmx.chm::/mxcloseextcal.html calHandle in calHandle in is a reference to the calibration session that you creat
Nowadays, a large number of chiral analyses are needed, simple and rapid methods for the determination of the enantiomeric composition in pharmaceutical products should be developed. The fluoxetine belongs to the most prescribed antidepressant chiral drugs and its enantiomers have a different duration of serotonin inhibition. This study presents cheap and fast alternative to traditional chiral techniques for the determination of the fluoxetine enantiomeric composition by the combination of UV/VIS spectrometry and multivariate calibration. The chiral recognition of the fluoxetine was based on the creating of the diastereomeric complexes with α- and β- cyclodextrin. Multivariate calibration methods, including principal component regression (PCR) and partial least square method (PLS), were used for spectral data evaluation. Small differences in results between eachcyclodextrin and both calibration models were obtained by multivariate calibration. PLS model for determination of the enantiomeric ...
The IIP2 requirement in fully integrated direct-conversion receivers using FDD duplexing is prohibitively high and demands the use of an external filter in order to attenuate the leakage from the transmitter. This paper presents a digital calibration technique for passive CMOS down-converters that allows a direct conversion receiver achieve the requirements without external filtering. A Least-Mean-Square optimization algorithm is used in order to reduce the low-frequency second-order intermodulation product. The algorithm controls the digital calibration structures at the biasing of the passive mixer and adapts them until the second order intermodulation drops below the noise level. The method is tested by calibrating a 1.2-V 65nm CMOS passive mixer targeting UMTS/LTE applications at several corner conditions including worst case mismatches in the switching pairs.. ...
A new method for performing a full two-port s-parameter calibration in free-space is presented. The proposed calibration technique computes the error coeff
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Starts an external calibration session on a device. LabVIEW NXG does not support FPGA devices Not supported in VIs that run in a web application DAQmx Initialize External Calibration.vi |helpdir|:/lvdaqmx.chm::/mxinitextcal.html device in device in is the name as configured in MAX of the device to w
Manufacturer of Imported Weighing Balances - Analytical Balance With Internal Calibration, Analytical Balance With External Calibration, Economic Compact Balance and Halogen Moisture Balance offered by Safire Scientific Company, Coimbatore, Tamil Nadu.
Calibration Criteria. Note: Do not apply the brake pedal during the brake pedal position (BPP) sensor calibration procedure. Any movement of the brake pedal during this procedure will cause the calibration procedure to fail. If this occurs, the sensor calibration must be repeated.. Brake pedal position (BPP) sensor calibration must be performed after the sensor or body control module (BCM) have been serviced. The calibration procedure will set the sensor home value. This value is used by the BCM to determine the action of the driver applying the brake system and to provide this information to the vehicle subsystems via serial data.. Calibration Procedure. ...
TY - JOUR. T1 - Geometric calibration of the SND detector electromagnetic calorimeter. AU - Korol, A. A.. AU - Melnikova, N. A.. PY - 2017/3/1. Y1 - 2017/3/1. N2 - This paper presents the design, implementation and validation of the software alignment procedure used to perform geometric calibration of the electromagnetic calorimeter with respect to the tracking system of the SND detector which is taking data at the VEPP-2000 e+e− collider (BINP, Novosibirsk). This procedure is based on the mathematical model describing the relative calorimeter position. The parameter values are determined by minimizing a χ2 function using the difference between particle directions reconstructed in these two subdetectors for e+e−→e+e− scattering events. The results of the calibration applied to data and MC simulation fit the model well and give an improvement in particle reconstruction. They are used in data reconstruction and MC simulation.. AB - This paper presents the design, implementation and ...
Improved Calibration vector network analyzer calibration method of storing sparse data, using the measurements from each of the vector network analyzer calibration data sparse system error interpolated data, and system data and uncorrected errors from each frequency measurement measurement data to create measurement data calibration. It may be measured by the measuring frequency range greater than the specified frequency range of calibration every N th frequency step, or by the measurement of the calibration of each frequency step of the frequency range and the length measurement data obtained by compression, to produce calibration data sparse. Interpolation algorithm may be used by fitting a polynomial curve fitting parameters such as curve algorithm.
The need for custom footwear among the consumers is growing every day. Serious research is being undertaken with regards to the fit and comfort of the footwear. The integration of scanning systems in the footwear and orthotic industries have played a significant role in generating 3D digital representation of the foot for automated measurements from which a custom footwear or an orthosis is manufactured. The cost of such systems is considerably high for many manufacturers due to their expensive components, complex processing algorithms and difficult calibration techniques. This thesis presents a fast and robust calibration technique for a low-cost 3D laser scanner. The calibration technique is based on determining the mathematical relationship that relates the image coordinates to the real world coordinates. The relationship is determined by mapping the known real world coordinates of a reference object to its corresponding image coordinates by multivariate polynomial regression. With the ...
AVL CRETA 5™ is a calibration data lifecycle management system designed for the calibration of all vehicle control units. It supports and facilitates your agile calibration process by helping engineers perform their tasks faster and more efficiently. Support Your Agile Calibration Process ...
Ohaus Pioneer PA4202C precise scale weighs up to 4200 grams in 0.01 gram increments and has internal motorized calibration. A simple press of the CAL keypad starts the internal calibration.
Zhang model [two][3] can be a camera calibration process that makes use of traditional calibration procedures (identified calibration factors) and self-calibration methods (correspondence concerning the calibration details when they are in different positions). To execute an entire calibration from the Zhang technique at least three different pictures of your calibration focus on/gauge are expected, possibly by relocating the gauge or even the digital camera alone ...
The device being calibrated must be running a public release of iOS 10.0 or later. A device running iOS 9 or earlier will be irreparably damaged by the fixture if it is not updated first. It must be awake on the lock screen or the home screen prior to beginning the procedure, and have at least 20% battery remaining. Additionally, the technician must have a Genius Room iMac running the latest version of 3DTouchCal software, and a 3D Touch Calibration Fixture, connected to the iMacs Ethernet port. Often called Horizon machines due to their codename, 3D Touch Calibration Fixtures have the ability to calibrate the display, proximity sensor, and pressure sensors on iPhone 6s or later. They can also pair new Touch ID buttons to a Secure Enclave Processor. They are not to be confused with Display Calibration Fixtures, which are used with iPhone 5 through iPhone 6 Plus during the Display Calibration Procedure. Finally, the device to be calibrated must be wiped clean with a lint-free microfiber cloth ...
The present invention provides a method of calibrating a spectroscopic device for providing a non-invasive measurement of an analyte level in a sample. The method comprises the steps of: (a) providing a plurality of calibration algorithms; (b) taking a set of non-invasive measurements on said sample with said spectroscopic device; (c) calculating a predicted set of analyte levels for each of the calibration algorithms in response to the set of non-invasive measurements, each of the predicted sets of analyte levels being characterized by a variability range, a slope, an R 2 (a square of the correlation between said set of non-invasive measurements and said predicted set of analyte levels), and a standard error of prediction; and (d) selecting an appropriate calibration algorithm by using a suitability score based on the variability range, the slope, the R2 an the standard error of prediction for each of the predicted sets of analyte levels. A method of generating suitable calibration algorithms in step
Sartorius Entris Precision Balances - PROMO Internal Calibration; Capacity: 420g Balances, Scales and Weighing:Laboratory Balances:Analytical Balances
Ohaus AX5202 Adventurer precision balance with 5200 gram capacity, 0.01 gram readability and 18 other weighing units. Internal calibration, 9 modes and more.
Adam Equipment SAB 314i Solis Analytical balance with 310g capacity, 0.1mg readability. Features internal calibration, percent weighing, formulation, and more.
Adventurer Pro Analytical Balances, With Internal Calibration, Ohaus - Model AV212C - Each : dimensions: 22 x 8.5 x 30 (811/16 x 33/8 x 1113/16) -|-
Many anisotropic phenomenological yield functions have been proposed in the literature in which their predictive capabilities strongly depend on the experimental calibration data as well as the calibration procedure to identify the anisotropy parameters. In this paper, emphasis is placed upon the experimental and numerical calibration procedure of anisotropic yield functions in the region of shear loading (zero hydrostatic stress with equal and opposite in-plane principal strains and stresses). Conventional anisotropic calibration procedures are shown to introduce non-physical artefacts into constitutive models which manifest as a non-zero hydrostatic stress or through-thickness strains generated under in-plane shear stress that violate the definition of the shear loading condition. To overcome this issue, a new physically necessary constraint is applied on the plastic potential to enforce equal and opposite principal strains in the shear state and correct the shear region of anisotropic yield ...
A method and apparatus for measuring the concentration of an analyte present in a biological fluid is disclosed. The method includes the steps of applying NIR radiation to calibration samples to produce calibration data, analyzing the calibration data to identify and remove outliers, constructing a calibration model, collecting and analyzing unknown samples to identify and remove outliers, and predicting analyte concentration of non-outliers from the calibration model. Analysis of the calibration data includes data pretreatment, data decomposition to remove redundant data, and identification and removal of outliers using generalized distances. The calibration model may utilize principal component regression, partial least squares, multiple linear regression, or artificial neural networks, and reduction using principal component analysis or partial least squares scores. Unknown sample data is analyzed using data pretreatment followed by projection into the calibration model space, and identification and
Electronic balances are precision instruments and are very susceptible to changes in room temperature. Sensitivity must be calibrated whenever required since changes in room temperature influence weight measurement values, which are not supposed to change. This is why the balance captures changes in room temperature that affect sensitivity and automatically starts calibration using built-in weights. This ensures that sensitivity is constant at all times, allowing the operator to concentrate on measurement tasks without having to worry about sensitivity calibration.. The balance starts calibration using built-in weights at preset times of the day. If you set calibration times before important measurements (e.g. before starting work in the morning, or during the lunch or evening break), the balance will automatically start calibration when the preset time is reached. Consistent measurement is possible without worrying about sensitivity calibration.. The balance incorporates motor-driven ...
A visual sensor calibration method of calibrating of a visual sensor in a robot system. A pattern plate is provided on an arm of a robot, and the calibration pattern data (CPDr) of the pattern plate on robots base coordinates is sent from a robot controller to a visual sensor controller. The visual sensor controller picks up an image of the pattern plate by a camera to obtain calibration pattern data (CPDc). The calibration data (CD) is obtained from the calibration pattern data (CPDr) and the calibration pattern data (CPDc), to thereby calibrate the visual sensor.
The development of a viable self-calibration approach for use with non-metric cameras was investigated. Both computer generated and actual test camera data were generated to determine the effectiveness of the math model and computer program. A twenty-seven parameter bundle adjustment routine was proposed because of its versatility and compatible use in an existing aerotriangulation package. For the camera and test configuration considered, the focal length was recovered to within two percent, and the principal point location was recovered to wi thin O. 3 to twelve percent. When the computer generated data was used, the focal length and principal point offset were recovered to within 0.2 percent.. Modeling and software has been made available for a future comparative study between the self-calibration and Direct Linear Transformation adjustment parameters. The self-calibration modeling and former Direct Linear Transformation modeling software is a promising tool for mensuration tests and ...
Article Sensitivity of the performance of a conceptual rainfall–runoff model to the temporal sampling of calibration data. The effect of the time step of calibration data on the performance of a hydrological model is examined through a numeric...
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Calibration in atomic-absorption spectrometry is achieved by means of a concentration--gradient chamber using a single concentrated standard solution. Calibration is rapid and extends over the entire working concentration range of the analyte, irrespective of the shape of the conventionally obtained calibration curve. No curve-fitting approximations are involved. With well-designed apparatus, deviations are less than 1%.
Utilizing multiple instructors with deep expertise in dimensional calibration methods and practice, this course is unlike any other calibration course. With hands-on exercises, the first day of this course covers key principles that apply to all calibration situations, such as selection of calibration methods, use of appropriate reference standards, reporting of results, and traceability. Students will perform actual calibrations, learn and practice techniques to improve accuracy of results, and understand how the general principles learned in class can be extended to the development of other calibration methods. Day two of the course moves into a series of demonstrations and hands-on practice of various calibrations, and by the end of day two, the students will have covered all of the most common dimensional calibrations, including micrometers, calipers, dial indicators, test indicators, digital indicators, height gages, and micrometer standards. Day three provides for opportunities to cover ...
Utilizing multiple instructors with deep expertise in dimensional calibration methods and practice, this course is unlike any other calibration course. With hands-on exercises, the first day of this course covers key principles that apply to all calibration situations, such as selection of calibration methods, use of appropriate reference standards, reporting of results, and traceability. Students will perform actual calibrations, learn and practice techniques to improve accuracy of results, and understand how the general principles learned in class can be extended to the development of other calibration methods. Day two of the course moves into a series of demonstrations and hands-on practice of various calibrations, and by the end of day two, the students will have covered all of the most common dimensional calibrations, including micrometers, calipers, dial indicators, test indicators, digital indicators, height gages, and micrometer standards. Day three provides for opportunities to cover ...
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The ZSSC3122 Mass Calibration System provides the hardware needed for simultaneous configuration, calibration and evaluation of multiple ZSSC3122 Capacitive Sensor Signal Conditioner (SSC) ICs. The users PC can communicate via the SSC Communication Board with multiple ZSSC3122 ICs (DUTs) mounted on either the users modules or ZSSC3122 Mass Calibration Reference Boards, which are connected through the Mass Calibration Board (MCB). Each MCB allows connection of up to 24 DUTs. The system can operate with up to 8 MCBs, allowing connection of up to 192 DUTs. The Evaluation Kit Software is available on-line for free download.. For further information and support for the SSC Communication Board, visit the SSC-CB product page.. Additional boards can be ordered separately. To enable product comparisons, this modular kit is compatible with other select IDT devices. Contact your local sales representative for more information.. ...
An identification of the model parameters for a parallel cable-driven robot is performed by using both a calibration and a self-calibration approach. The manipulator studied is based on a parallel architecture having 8 cables to control the 6 degrees of freedom of its mobile platform so that the mobile platform is fully constrained by the cables. Under some hypotheses on cable properties, the interest of redundancy in actuation is exploited to self-calibrate by using proprioceptive sensors. This approach is compared to the difficulties to implement a calibration process. Additionally, advanced tools and algorithmic improvements are presented to perform the parameter identification. A complete experimentation validates the robot accuracy improvement after calibration or self-calibration. We show that the basic hypotheses on cable properties are verified. Moreover, the investment in terms of time and cost to obtain the external measurements for calibration process does not bring better results and does
Fisher Scientific - OHAUS Adventurer Precision Balances with External Calibration - Strikes the ideal balance between inventive features and functional, uncomplicated weighing capabilities.
Multivariate Calibration Harald Martens, Chemist, Norwegian Food Research Institute, Aas, Norway and Norwegian Computing Center, Oslo, Norway Tormod Næs, Statistician, Norwegian Food Research Institute, Aas, Norway The aim of this inter-disciplinary book is to present an up-to-date view of multivariate calibration of analytical instruments, for use in research, development and routine laboratory and process operation. The book is intended to show practitioners in chemistry and technology how to extract the quantitative and understandable information embedded in non-selective, overwhelming and apparently useless measurements by multivariate data analysis. Multivariate calibration is the process of learning how to combine data from several channels, in order to overcome selectivity problems, gain new insight and allow automatic outlier detection. Multivariate calibration is the basis for the present success of high-speed Near-Infrared (NIR) diffuse spectroscopy of intact samples. But the ...
Two important aspects of internal calibration of polarimetric synthetic aperture radar are discussed, i.e., system gain calibration and individual transmit
The transfer of a multivariate calibration model for quantitative determination of diethylene glycol (DEG) contaminant in pharmaceutical-grade glycerin between five portable Raman spectrometers was accomplished using piecewise direct standardization (PDS). The calibration set was developed using a multi-range ternary mixture design with successively reduced impurity concentration ranges. It was found that optimal selection of calibration transfer standards using the Kennard-Stone algorithm also required application of the algorithm to multiple successively reduced impurity concentration ranges. Partial least squares (PLS) calibration models were developed using the calibration set measured independently on each of the five spectrometers. The performance of the models was evaluated based on the root mean square error of prediction (RMSEP), calculated using independent validation samples. An F-test showed that no statistical differences in the variances were observed between models developed on ...
Camera calibration plays a critical role in 3D computer vision tasks. The most commonly used calibration method utilizes a planar checkerboard and can be done nearly fully automatically. However, it requires the user to move either the camera or the checkerboard during the capture step. This manual operation is time consuming and makes the calibration results unstable. In order to solve the above problems caused by manual operation, this paper presents a full-automatic camera calibration method using a virtual pattern instead of a physical one. The virtual pattern is actively transformed and displayed on a screen so that the control points of the pattern can be uniformly observed in the camera view. The proposed method estimates the camera parameters from point correspondences between 2D image points and the virtual pattern. The camera and the screen are fixed during the whole process; therefore, the proposed method does not require any manual operations. Performance of the proposed method is evaluated
This article adresses the hyperbolic catadioptric camera calibration matter.An automatic calibration process has been developped,thus no user intervention is required to perform the camera intrinsic and extrinsic parameters estimation. This process uses a specific calibration pattern built to fit the geometry of the sensor.The pattern features are really easy to identify and allow a robust camera calibration.The performances of the algorithm are illustrated by some examples.. Résumé. Cet article présente une procédure détalonnage pour les caméras panoramiques catadioptriques utilisant un miroir hyperbolique de révolution. Lalgorithme que nous avons développé permet un étalonnage automatique (sans intervention dun opérateur) des paramètres intrinsèques et extrinsèques de la caméra. Il utilise une mire détalonnage particulière,adaptée à la géométrie du capteur. Cette mire contient des formes particulièrement simples à détecter et permet un étalonnage robuste du ...
We propose a computational calibration method for optical tomography. The model of the calibration scheme is based on the rotation symmetry of source and detector positions in the measurement setup. The relative amplitude losses and phase shifts at the optic fibers are modeled by complex-valued coupling coefficients. The coupling coefficients can be estimated when optical tomography data from a homogeneous and isotropic object are given. Once these coupling coefficients have been estimated, any data measured with the same measurement setup can be corrected for the relative variation in the data due to source and detector losses. The final calibration of the data for the source and detector losses and the source calibration between the data and the forward model are obtained as part of the initial estimation for reconstruction. The calibration method was tested with simulations and measurements. The results show that the coupling coefficients of the sources and detectors can be estimated with ...
Camera calibration may refer to: Camera resectioning, which is called also geometric camera calibration Color mapping, which is a method for photometric camera calibration Radiometric ...
Camera calibration is one of the fundamental photogrammetric tasks. The standard procedure is to apply an iterative adjustment to measurements of known control points. The iterative adjustment needs initial values of internal and external parameters. In this paper we investigate a procedure where only one parameter - the focal length is given a specific initial value. The procedure is validated using the freely available Damped Bundle Adjustment Toolbox on five calibration data sets using varying narrow- and wide-angle lenses. The results show that the Gauss-Newton-Armijo and Levenberg-Marquardt-Powell bundle adjustment methods implemented in the toolbox converge even if the initial values of the focal length are between 1/2 and 32 times the true focal length, even if the parameters are highly correlated. Standard statistical analysis methods in the toolbox enable manual selection of the lens distortion parameters to estimate, something not available in other camera calibration toolboxes. A ...
Fisher Scientific™ Fisher Scientific™ Traceable™ Conductivity Calibration Standards Certified Reference Material (CRM) NIST Individual bottle...
Hi, Im a graduate student in Curt Franks group in Chemical Engineering. I am in charge of maintaining and calibrating our DI Nanoscope AFMs. I was wondering if anyone has calibration standards we could borrow for a day or two. Specifically, wed like to find high accuracy vertical calibration standards. We currently have vertical standards of SiO2 steps with +/- 1nm accuracy step heights, but wed like to calibrate our scanners to even higher accuracy (down to angstroms) since we have features on the order of a few nanometers that wed like to characterize. If you have standards we might be able to borrow (or advice or suggestions), please contact me at this email or at 650-723-9140 and it would be greatly appreciated! Thanks! Lisa Hwang ...
250ml Refractometer & Hydrometer Calibration Standard - Brightwell Aquatics 1.0264 Specific Gravity 1.3394 Refractive Index 35 ppt Salinity 53 uS/cm at 25 deg c250ml Brightwell Aquatics Aquarium Reagents Refractometer & Hydrometer Calibration Standard is designed to provide an accurate reference
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): In order to address the difficulty of arranging large calibration objects and the low mea-surement accuracy of small calibration objects in traffic accident scene photogrammetry, a photogrammetric method based on a composite of small calibration objects is proposed. Several small calibration objects are placed around the traffic accident scene, and the co-ordinate system of the composite calibration object is given based on one of them. By maintaining the relative position and coplanar relationship of the small calibration objects, the local coordinate system of each small calibration object is transformed into the coordi-nate system of the composite calibration object. The two-dimensional direct linear trans-formation method is improved based on minimizing the reprojection error of the calibration points of all objects. A rectified image is obtained using the nonlinear optimization method. The increased accuracy of traffic
Among the world’s elite flow calibration facilities, the Badger Meter Flow Dynamics primary and secondary standard calibration laboratories, located in Racine, WI, calibrate most flow meters from any manufacturer. The Flow Dynamics primary standard calibration facility offers superior liquid and gas calibration uncertainties, as documented by the National Voluntary Laboratory Accreditation Program (NVLAP*), Lab Code 200668-0, Scope of Accreditation to ISO/IEC 17025:2005 and NIST Handbook 150. Effective immediately, please send products for calibration to: Badger Meter, Inc. Attn: Calibration Lab 8635 Washington Ave Racine, WI 53406
MESA Specialty supplies petrochemical and refinery gas calibration standards, including natural gas pipeline calibration gas standards. Also available are polymer, sulphur,butadiene gas standard and liquid calibration mixtures.
Image: Michal Marcol / FreeDigitalPhotos.net). Teddington, UK -?? A two day training course on humidity measurement and calibration, covering measurement techniques, terms and definitions;,calculations, traceability and calibration and hands-on laboratory sessions.. The course will open with an introductory session on humidity terms and definitions followed by talks that will cover the necessary background to the subject with full course notes provided. A tour of the NPL Humidity laboratory, plus hands-on sessions, will give a practical introduction to humidity measurement and calibration techniques.. This will be reinforced with talks on uncertainties, traceability and accreditation.. To view the programme, click here for the current/most recent course flyer.. All participants will receive a certificate of attendance.. This course is suitable for technicians and technical managers closely concerned with humidity measurement and calibration.. The course will be given by members of the NPL ...
In a computer tomography system, a flexible calibration phantom is utilized simultaneously with analysis of a patient to ensure accuracy of imagry and to facilitate interpretation of tomographs created. The flexible calibration phantom is preferably placed directly upon a patient between a radiation source and a radiation detector. It includes two solid and flexible samples of reference materials, each having a substantially uniform density, and a solid and flexible encasement surrounding the samples of reference material. The encasement has a substantially uniform density different than that of each of the samples of reference material, and the combination provides suitable reference points for proper analysis of tomographs obtained.
A system and method for radar detection and calibration. By measuring the true range of a calibration target on entry to the radars detection zone, the actual detection capability of the radar in current atmospheric conditions with the actual radar can be determined. The radar system is also adapted to determine a sensed position at a sensed time of a target in the radars detection zone. A calibration target, preferably an unmanned air vehicle (UAV), includes a position device for determining the actual position of the calibration target. A calibration device communicates with the radar system and the calibration target and receives the sensed and actual positions of the calibration target. The calibration device calculates the error between the sensed position and the actual position and adjusts the radar system to minimize the error. The target may include a signal augmentation device to augment the radar cross-section of the target to replicate the radar cross-sections of targets of various types.
A system and method for radar detection and calibration. By measuring the true range of a calibration target on entry to the radars detection zone, the actual detection capability of the radar in current atmospheric conditions with the actual radar can be determined. The radar system is also adapted to determine a sensed position at a sensed time of a target in the radars detection zone. A calibration target, preferably an unmanned air vehicle (UAV), includes a position device for determining the actual position of the calibration target. A calibration device communicates with the radar system and the calibration target and receives the sensed and actual positions of the calibration target. The calibration device calculates the error between the sensed position and the actual position and adjusts the radar system to minimize the error. The target may include a signal augmentation device to augment the radar cross-section of the target to replicate the radar cross-sections of targets of various types.
The increase in the concentration of carbon dioxide (CO2) in the atmosphere has led the scientific community to investigate the adverse effects on humanity and nature, including the greenhouse effect, which contributes to global warming and can lead to climate change, besides the risks associated with human health. Due to the importance of metrological issues in the current scenario, the Laboratory of Gas Analysis (Lanag) of the National Institute of Metrology, Quality and Technology (Inmetro) is developing the methodology of preparation of such primary standard gas mixtures through gravimetry. For the preparation of these standards, an analysis verification step is necessary, carried out by means of an analytical technique of comparison, at low levels of concentration, by cavity ringdown (CRDS) and by gas chromatography using a flame ionization detector coupled to a methaniser catalyst (GC-FIDmeth). This work presents the method validation of both methodologies developed to analyze a range of
EOS satellite instruments operating in the visible through the shortwave infrared wavelength regions (from 0.4 micrometer to 2.5 micrometer) are calibrated prior to flight for radiance response using integrating spheres at a number of instrument builder facilities. The traceability of the radiance produced by these spheres with respect to international standards is the responsibility of the instrument builder, and different calibration techniques are employed by those builders. The National Aeronautics and Space Administrations (NASAs) Earth Observing System (EOS) Project Science Office, realizing the importance of preflight calibration and cross-calibration, has sponsored a number of radiometric measurement comparisons, the main purpose of which is to validate the radiometric scale assigned to the integrating spheres by the instrument builders. This paper describes the radiometric measurement comparisons, the use of stable transfer radiometers to perform the measurements, and the measurement ...
In analytical chemistry, a calibration curve is a general method for determining the concentration of a substance in an unknown sample by comparing the unknown to a set of standard samples of known concentration.[1] A calibration curve is one approach to the problem of instrument calibration; other approaches may mix the standard into the unknown, giving an internal standard. The calibration curve is a plot of how the instrumental response, the so-called analytical signal, changes with the concentration of the analyte (the substance to be measured). The operator prepares a series of standards across a range of concentrations near the expected concentration of analyte in the unknown. The concentrations of the standards must lie within the working range of the technique (instrumentation) they are using.[2] Analyzing each of these standards using the chosen technique will produce a series of measurements. For most analyses a plot of instrument response vs. concentration will show a linear ...
0068] In accordance with another aspect of the present invention, there is provided a method of performing internal diameter measurements using a probe apparatus as described herein and a dent calibration standard. A specific example of such a method comprises the following steps: [0069] 1. Setup and prepare the eddy current instrumentation at the location of the inspection; [0070] 2. Connect the probe and verify it is operating correctly; [0071] 3. Insert the probe into the dent calibration standard; [0072] 4. While ensuring that both modules are away from any calibration references, null the probe to balance the electronic bridge; [0073] 5. Review the calibration reference data from the calibration standard and adjust the dent signals so that they deflect vertically as the probe passes over a dent; [0074] 6. Push the probe entirely through the dent calibration standard; [0075] 7. While pulling at a constant speed, record the data as the probe is pulled through and out of the dent calibration ...
Fingerprint Dive into the research topics of Retrospectively supervised click decoder calibration for self-calibrating point-and-click brain-computer interfaces. Together they form a unique fingerprint. ...
are the averages of the x and y measurements and S denotes summation over all n observations. When the points lie exactly on a straight line of positive slope R = +1; when the points lie exactly on a straight line of negative slope R = 1. Mathematically R lies between +1 and 1. Maybe this fact has given rise to the idea that R being near ± 1 indicates a linear relationship between the x and y variables. However values of R which can be considered large can come from markedly non-linear relationships.12,13 Although it has been discussed by many authors, in practice analysts misunderstand this concept. For analytical processes considering instrumental responses the calibration function is usually obtained by means of a calibration experiment; the observations usually represent the result of a physical measurement that must be converted into the analytical result.14 The model equation used is the straight line equation, Yi = b + aXi + ei (with i =1 to n), where Yi is the response variable, Xi the ...
The Testing and Calibration Pillar in KENAS provides accreditation for the recognition of the technical competence of a testing and calibration laboratory for a specific task following ISO/IEC 17025:2005.. KENAS testing and calibration has been established with the objective to provide Government, Industry and Private laboratories in general with a scheme for third-party assessment of the quality and technical competence of testing and calibration laboratories to carry out specific testing, measurements and calibrations. Government of Kenya has authorized KENAS as the sole accreditation body for Testing and Calibration laboratories.. Laboratory Accreditation. The concept of Laboratory Accreditation was developed to provide a means for third-party attestation of the competence of laboratories to perform specific type(s) of testing and calibration.. Laboratory Accreditation provides formal recognition of competent laboratories, thus providing a ready means for customers to find reliable testing ...
Established in 2004, Delta Wye Calibration and Testing Company LLC Dubai, UAE, is meticulous about calibration and testing for all industrial sectors in UAE likely Manufacturing, Oil and Gas, Process Industry, Engineering, Fabrication, Aviation, Medical, Electromechanical, Service and so on.. Adhering to standards equivalent to ISO 9001:2008 & ISO/IEC 17025:2005 demonstrates our service noteworthy & competent. Knowledgeable, Efficient and Proficient Workforce further enables our service and assistance at Delta Wye Calibration and Testing Company LLC to be competent and remain best in the industry.. Delta Wye Calibration and Testing Company LLC provide calibration of highest quality offering a whole range of factory and onsite services. Our calibration and testing services are designed to ensure that your testing system meet or exceed relevant standards. Our team is specialized, trained and supported with necessary tools.. Services Delta Wye Calibration and Testing Company LLC provide includes: ...
Leaf water content is one of the most common physiological parameters limiting efficiency of photosynthesis and biomass productivity in plants including Miscanthus. Therefore, it is of great significance to determine or predict the water content quickly and nondestructively. In this study, we explored the relationship between leaf water content and diffuse reflectance spectra in Miscanthus. Three multivariate calibrations including partial least squares (PLS), least squares support vector machine regression (LSSVR), and radial basis function (RBF) neural network (NN) were developed for the models of leaf water content determination. The non-linear models including RBF_LSSVR and RBF_NN showed higher accuracy than the PLS and Lin_LSSVR models. Moreover, 75 sensitive wavelengths were identified to be closely associated with the leaf water content in Miscanthus. The RBF_LSSVR and RBF_NN models for predicting leaf water content, based on 75 characteristic wavelengths, obtained the high determination
KENNEWICK, Washington - April 19, 2017 - Bruker introduces a new calibration package for the EOS 500 handheld Laser Induced Breakdown Spectrometer (HH-LIBS). In response to customer input, the EOS 500 now has the option to include Iron, Nickel, Copper and Cobalt alloy calibrations, in addition to the existing light metal calibrations (e.g. Aluminum, Titanium and Magnesium base alloys). The EOS 500 is a metals analyzer which can provide rapid grade ID, as well as the chemistry, of the sample under test. This is an excellent choice for either scrap sorting or Positive Material Identification (PMI) measurements; especially for light metals where the measurement is approximately 10x faster than handheld XRF. The EOS 500s rugged design ensures that it will withstand field operation in nearly all environments, including humid and dusty conditions. In addition, the EOS 500 has a unique Air-Flow Optics Shield, which creates a continuous air shield in front of the optics in order to prevent dust ...
On April 14,2003, three Earth remote sensing spacecraft were maneuvered enabling six satellite instruments operating in the visible through shortwave infrared wavelength region to view the Moon for purposes of on-orbit cross-calibration.
TY - JOUR. T1 - Constraining permeabilities in a large-scale groundwater system through model calibration. AU - Ophori, D. U.. PY - 1999/10/12. Y1 - 1999/10/12. N2 - The range of field estimates of permeabilities in rocks of the Atikokan Research Area (ARA), Canada, has been reduced by calibrating a groundwater flow model of the ARA. The flow model was calibrated to the recharge component of the water balance and to measured freshwater heads in boreholes. A good match between field and simulated recharge, and between measured and simulated heads was obtained with two different permeability-depth distributions that differed by up to two orders of magnitude in places. Solute transport simulation of the distributions of total dissolved solids (TDS), chlorides (CI) and oxygen-18 (18O) in groundwater in the area was performed to further refine the permeability estimates. Vertical average linear groundwater velocities from the calibrated flow model were used in one-dimensional solute transport models ...
0076] Sensors described herein may be configured to require no system calibration or no user calibration. For example, a sensor may be factory calibrated and need not require further calibrating. In certain embodiments, calibration may be required, but may be done without user intervention, i.e., may be automatic. In those embodiments in which calibration by the user is required, the calibration may be according to a predetermined schedule or may be dynamic, i.e., the time for which may be determined by the system on a real-time basis according to various factors. Calibration may be accomplished using an in vitro test strip or other calibrator, e.g., a small sample test strip such as a test strip that requires less than about 1 microliter of sample (for example FreeStyle® blood glucose monitoring test strips from Abbott Diabetes Care). For example, test strips that require less than about 1 nanoliter of sample may be used. In certain embodiments, a sensor may be calibrated using only one sample ...
The calibration procedure will automatically perform calibration at four points of rainfall intensity typically in the range 40-80mm/hr.. This allows the company to offer users more detailed technical information on the product and improved service levels.. All gauges will now be supplied with a printed multi-point calibration certificate, essential for traceability of data and product performance auditing.. Gauges are accurate to A correction algorithm is now also provided as standard, allowing users to undertake correction of rainfall data at extremely high rainfall densities if required ( With correction, all tipping buckets provide intensity errors of In addition to the calibration improvements, the funnel outlet diameter on the 0.2mm- and 0.5mm-capacity buckets have been increased to remove funnel back-up effects, reducing cost of ownership and the need for service visits in the field.. All Casella tipping bucket rain gauges are WMO and BMO compliant and calibrated in full compliance with ...
EVERETT, WA--(Marketwire - January 31, 2011) - Fluke Calibration, a global leader in calibration instrumentation and software, has introduced the 1551A Ex and 1552A Ex Stik Thermometers, engineered to give temperature calibration specialists the durable, intrinsically-safe digital instrument they need for precision temperature calibration. The Fluke 1551A and 1552A Stik...
GIS Calibration sse in El SalvadorSolution Delivery with Calibration. Environmental data is directly related to public health. Hence, its accuracy is very crucial. Oizom technology excels in data accuracy for environmental monitoring solutions. Oizom equipment pass through a 3-level calibration procedure - Factory, Lab, and Co-location calibration for accuracy.
Search and download thousands of Swedish university dissertations (essays). Full text. Free. Dissertation: ATLAS Calorimetry Hadronic Calibration Studies.
TY - RPRT. T1 - Calibration of Nacelle-based Lidar instrument. AU - Yordanova, Ginka. AU - Courtney, Michael. N1 - This is an internal report and therefore not available in full text. Please contact authors or director of authors department for further information.. PY - 2015. Y1 - 2015. N2 - This report presents the result of the lidar calibration performed for a two-beam nacelle based lidar at DTUs test site for large wind turbines at Høvsøre, Denmark. Calibration is here understood as the establishment of a relation between the reference wind speed measurements with measurement uncertainties provided by measurement standard and corresponding lidar wind speed indications with associated measurement uncertainties. The lidar calibration concerns the 10 minute mean wind speed measurements.. AB - This report presents the result of the lidar calibration performed for a two-beam nacelle based lidar at DTUs test site for large wind turbines at Høvsøre, Denmark. Calibration is here understood ...
The rectangular calibration chart 1 comprises a plurality of parallel stripe-like color patches that are distributed into groups 11, ..., 14 of adjacent color patches 111, 112, 113, 114, ..., 118, each stripe-like color patch having a uniform calibration color. The calibration colors of the different stripe-like color patches are regularly distributed in a perceptually uniform visual color space. Thank to this regular distribution, the best compromise can be found between the lowest number of different color patches and the highest accuracy of the calibration of a given color device. Such a calibration chart is advantageously used to correction of non-uniformities of the color device.
Applied Image to Feature Personal Identity Verification Calibration Standards at Photonics West - Dec 30, 2016 - Applied Image, Inc.
A simple, accurate and precise UV-spectrophotometric method based inverse least-squares was developed for the simultaneous determination of atorvastatin and amlodipine in tablet formulation. The absorbance values of the two analytes were linear with the concentration at the wavelengths taken at 5 nm interval over the range of 230 -260 nm. The calibration equations were developed using the absorbance values of nine synthetic mixtures containing different concentrations of two analytes measured at 5 nm intervalsin the range of 230 -260 nm. The developed equations werethen validated by calculating the analytes recovery from the analysis of a set of another five synthetic mixtures, the mean% recoveries were 100.02% and 100.06% with the corresponding% RSD of ±0.36 and±0.51 for atorvastatin and amlodipine, respectively. The calibration equations obtained were then used to obtain the concentration of each analyte in commercial samples. The mean % recoveries were 100.43% and 100.28% with the corresponding%
THE PRIMARY PROBLEM IN USING THE BUREAU OF PUBLIC ROADS ROUGHOMETER AT THE AASHO ROAD TEST HAS BEEN THE VARIABILITY OF THE INSTRUMENT. FREQUENT CALIBRATION HAS BEEN FOUND TO BE NECESSARY. USING THE ROAD TEST PROFILOMETER AS A STANDARD, A METHOD HAS BEEN DEVELOPED WHEREBY THE WHOLE DYNAMIC SYSTEM OF THE ROUGHOMETER CAN BE CALIBRATED. THIS PAPER DESCRIBES THE CALIBRATION TECHNIQUE FOR THE ROUGHOMETER AND ITS USE AT THE AASHO ROAD TEST, INCLUDING METHODS FOR MAKING PRESENT SERVICEABILITY DETERMINATIONS. /AUTHOR/. ...
Government Contract Award: A--Space Based Optical Sensor Calibration Approaches. Access many more A - Research and Development Awards | Get your Free Government Bids Alert!
Four size exclusion chromatography (SEC) calibration techniques were tested for use in the molecular weight characterisation of Streptococcal Hyaluronic Acid (HA). An exponential equation, evaluated using the Hamielec method, was superior to the customary peak position method. It provided the most accurate estimates of the weight average molecular weight, Mw. The calibration was valid for HA in the range 800 - 2500 kDa, and permitted the calculation of both polydispersity and molecular weight distributions for HA from Streptococcal fermentations. This exponential calibration approach should have application in the characterisation of other large biopolymers, particularly where pore size of available SEC media is limiting ...
Radar, Satellite tracking systems, Calibration, Self operation, Errors, Least squares method, Equations of motionThe report describes a radar calibration procedure currently in use at the Air Force Eastern Test Range AFETR - a procedure which uses only a single radars own passive tracking data of two successive passes of a satellite in conjunction with the theoretical equations of motion, known physical constants and associated computer program. No external tracking data or externally computed ephemeris is involved. Under routine conditions the zero-set biases and mislevel are estimated to an accuracy of 20 feet in range and 0.03 milliradians in angles. Under good conditions five other radar error model coefficients can be determined to comparable accuracy. The present maintained accuracy level of the AFETR radars is described. Author
We have shown that when it is used to monitor preterm infants receiving supplemental oxygen, the Masimo SET Radical pulse oximeter returns a reduced number of values of 87-90%. This is explained by the internal calibration algorithm, which changes in this region and adjusts SpO2 values above 87% upwards. A new software algorithm removed this artefact and returns a distribution of values that is similar to other current oximeters.. According to the product information, the oximeter is validated for accuracy in human blood studies on healthy adult volunteers in induced hypoxia studies in the range of 70-100% SpO2 against a laboratory CO-oximeter. This variation equals ±1 SD, which encompasses 68% of the population. The stated accuracy for neonates is ±3%, so by this standard at least 68% of the time the displayed SpO2 reading should be within ±3% of the simultaneous CO-oximeter value on an arterial blood sample. In this regard the original oximeter performs within all recommended accuracy ...
"Calibration and Standards in Flow Measurement" (PDF). Wiley. Archived (PDF) from the original on 29 August 2017. Retrieved 26 ... Calibration[edit]. Even though ideally the flowmeter should be unaffected by its environment, in practice this is unlikely to ... "Cone DP Meter Calibration Issues". Pipeline & Gas Journal. Archived from the original on 27 September 2017. Retrieved 1 ... The result of a flowmeter calibration will result in two related statistics: a performance indicator metric and a flow rate ...
For a more accurate calibration, however, an analysis in Fourier space is necessary. The power spectrum density P. (. ω. ). {\ ... Force Calibration[edit]. The determination of the force that is exerted by the magnetic field on the magnetic beads can be ... These calibration images are obtained by keeping a bead fixed while displacing the objective, i.e. the focal plane, with the ... Another force calibration method is to use the viscous drag of the microbeads: Therefore, the microbeads are pulled through the ...
Calibration[edit]. Many handheld breath analyzers sold to consumers use a silicon oxide sensor (also called a semiconductor ... Calibration is the process of checking and adjusting the internal settings of a breath analyzer by comparing and adjusting its ... The Dry-Gas Method utilizes a portable calibration standard which is a precise mixture of alcohol and inert nitrogen available ... These sensors are very stable, typically requiring calibration every 6 months, and are the type of sensor usually found in ...
Calibration and background radiation[edit]. If a gamma spectrometer is used for identifying samples of unknown composition, its ... Calibration is performed by using the peaks of a known source, such as caesium-137 or cobalt-60. Because the channel number is ... If the size of the detector crystal is known, one can also perform an intensity calibration, so that not only the energies but ... and generally include spectrum analysis tools such as energy calibration, peak area and net area calculation, and resolution ...
Calibration[edit]. Image calibration aims to minimize differences between an ideal lens models and the camera-lens combination ... The image stitching process can be divided into three main components - image registration, calibration and blending. ... Image blending involves executing the adjustments figured out in the calibration stage, combined with remapping of the images ... "Radiometric alignment and vignetting calibration" (PDF).. *^ a b Wells, Sarah; et al. (2007). "IATH Best Practices Guide to ...
Active Panel Antenna Calibration[edit]. Active Panel Antenna systems, comprising a planar array of micro-radios and associated ... Amplitude and Phase Mismatch Calibration Testbed for 2x2 Tower-Top Antenna Array System. China-Ireland Conference on ... control of the uplink and downlink RF beam pattern and avoids distortion effects that occur in the absence of calibration. ... antenna element, rely upon a comprehensive calibration scheme which is able to correct inter-path signal mismatches in phase, ...
Calibration and setup[edit]. Devices that use SNP technology require specific amounts of air pressure to be "sipped" or "puffed ... Once this calibration process is complete, the SNP device will only recognize the user specific sips and puffs that have been ... Typically, air pressure levels pertaining to hard sips/puffs and soft sips/puffs are set through an initial calibration of the ...
"Micro Pipette Calibration - Accumaximum". Retrieved 3 March 2016.. *^ "Pipette Calibration Standard - ECS". Retrieved 15 August ... Pipette calibration is considered to be a complex affair because it includes many elements of calibration procedure and several ... Calibration[edit]. Pipette recalibration[10] is an important consideration in laboratories using these devices. It is the act ... Pipette calibration is essential to ensure that the instrument is working according to expectations and as per the defined ...
Recovery and calibration methods[edit]. Due to the constant perfusion of the microdialysis probe with fresh perfusate, a total ... To date, the most frequently used calibration methods are the low-flow-rate method, the no-net-flux method,[7] the dynamic ( ... During calibration with the no-net-flux-method, the microdialysis probe is perfused with at least four different concentrations ... The low-flow-rate method is limited by the fact that calibration times may be rather long before a sufficient sample volume has ...
Calibration of lamps[edit]. The candlepower of a lamp was measured by judging by eye the relative brightness of adjacent ...
Calibration can be assessed using a calibration plot (also called a reliability diagram).[3][5] A calibration plot shows the ... "Probability calibration". jmetzen.github.io. Retrieved 2019-06-18.. *^ Platt, John (1999). "Probabilistic outputs for support ... Probability calibration[edit]. Not all classification models are naturally probabilistic, and some that are, notably naive ... In the multiclass case, one can use a reduction to binary tasks, followed by univariate calibration with an algorithm as ...
Intertemporal calibration[edit]. In orbit, radiometric calibrations drift for reasons including solar degradation of the cavity ... These calibrations require compensation to preserve consistent measurements.[21] For various reasons, the sources do not always ... Pre-launch ground calibrations relied on component rather than system level measurements, since irradiance standards lacked ... NIST validation of aperture area calibrations uses spares from each instrument; and applying diffraction corrections from the ...
The optode sensors can, however, work in the whole region 0% to 100% oxygen saturation in water, and the calibration is done ... With a two-point calibration (0% and 100% air saturation), it is possible to measure oxygen in the sample. ...
An IT8 calibration is done with what are called IT8 targets, which are defined by the IT8 standards. ... IT8.7/2 - 1993 (R2003) Graphic technology - Color reflection target for input scanner calibration[edit]. This standard defines ... IT8.7/1 - 1993 (R2003) - Graphic technology - Color transmission target for input scanner calibration[edit]. This standard ... 1.2 IT8.7/1 - 1993 (R2003) - Graphic technology - Color transmission target for input scanner calibration ...
calibration. *Камерализм. *campaign finance, economics of. *Canada, economics in. *Канар, Николя-Франсуа ...
"An analysis of calibration; the hard-easy effect and the emotional disappointment of overconfident behavior: Some experimental ...
Sample calibration colors[1] Class. B−V. U−B. V−R. R−I Teff (K) ... Zombeck, Martin V. (1990). "Calibration of MK spectral types". Handbook of Space Astronomy and Astrophysics (2nd ed.). ...
Bowring, S. A.; Martin, M. W. (2001). "Calibration of the Fossil Record". In Briggs & Crowther. Palæobiology II: A synthesis. ...
1987). "The calibration problem I. Estimation of mean absolute magnitude using trigonometric parallaxes". A&A. 171: 336-341. ... Hayes, D. S.; Pasinetti, L. E.; Philip, A. G. Davis (2012-12-06). Calibration of Fundamental Stellar Quantities: Proceedings of ... Francis, Charles (1 October 2013). "Calibration of RAVE distances to a large sample of Hipparcos stars". MNRAS. 436 (2): 1283- ... 507, p. 573 article entitled "On the Use of Trigonometric Parallaxes for the Calibration of Luminosity Systems: Theory."[1] ...
Calibration. In: Perspectives on Science, vol. 5, 1997, pp. 31-80. Millikan´s Oil Drop Experiments. In: The Chemical Educator, ...
Calibration. Many forms of mechanical or electronic equipment require periodic intrusive calibration. Other administrative ...
This establishes a second calibration point for the pyrometer. This step is repeated to carry the calibration to higher ... However, known temperatures must be used to determine the calibration of the pyrometer. For temperatures above the calibration ... This establishes the primary calibration temperature and can be expressed in terms of current through the pyrometer lamp. With ...
Marshall, L. G.; Butler, R. F.; Drake, R. E.; Curtis, G. H.; Tedford, R. H. (1979-04-20). "Calibration of the Great American ...
They are therefore used as a calibration standard for optical spectrophotometers[11][12] and are available commercially.[13] As ... "Holmium Glass Filter for Spectrophotometer Calibration". Archived from the original on 2010-03-14. Retrieved 2009-06-06.. ... A solution of 4% holmium oxide in 10% perchloric acid, permanently fused into a quartz cuvette as an optical calibration ... 2002). "An International Evaluation of Holmium Oxide Solution Reference Materials for Wavelength Calibration in Molecular ...
George, E.; Foster, D. P. (2000). "Calibration and empirical Bayes variable selection". Biometrika. 87 (4): 731-747. doi: ...
It is an absolute calibration.. *The use of standard materials for calibration is not necessary. The calibration can be ... For Calvet-type calorimeters, a specific calibration, so called Joule effect or electrical calibration, has been developed to ... The calibration of the calorimetric detectors is a key parameter and has to be performed very carefully. ... It is a very accurate calibration.. An example of Calvet-type calorimeter is the C80 Calorimeter (reaction, isothermal and ...
Calibration equipment. Test equipment. Automatic test equipment. Support equipment for on- and off-equipment maintenance. ... Technical and supply bulletins Transportability guidance technical manuals Maintenance expenditure limits and calibration ...
"External Calibration". Retrieved 18 March 2008. Torres, Rebecca E.; William A. Hyman (2007). "Replacement Parts-Identical, ... ISBN 978-3-527-31255-9. "Calibration of dissolution test apparatus (USP apparatus 1 and 2) - SOP". Missing or empty ,url= (help ... in particular items that are shock sensitive and require balancing or calibration, and re-qualification needs to be conducted ...
Techniques in multivariate calibration are often broadly categorized as classical or inverse methods. The principal difference ... classical calibration for small data sets". Fresenius' J. Anal. Chem. 368 (6): 585-588. doi:10.1007/s002160000556. PMID ... Multivariate calibration techniques such as partial-least squares regression, or principal component regression (and near ... Olivieri, A. C.; Faber, N. M.; Ferre, J.; Boque, R.; Kalivas, J. H.; Mark, H. (2006). "Guidelines for calibration in analytical ...
If you have a display calibration device and software, it's a good idea to use them instead of Display Color Calibration ... "The Monitor calibration and Gamma assessment page". Retrieved 2018-11-30. the problem is caused by the risetime of most monitor ... "Monitor calibration and gamma". Retrieved 2018-12-10. The chart below enables you to set the black level (brightness) and ... A good monitor with proper calibration shows the six numbers on the right in both bars, a cheap monitor shows only four numbers ...
Joint splinter session between OU-PHZ, OU-LE3, and WLSWG (and possibly OU-EXT) to divide the work necessary to calibrate the redshift distributions of WL sources. The idea here is to have the WLSWG provide guidelines about what they need and in what format, and PHZ and MER/LE3 to understand the requirements and have a plan to generate them in the appropriate format. ...
FEV offers calibration engineers its TOPexpert Suite of tools for calibration, test planning, model-based engine analysis, and ... You can think of the calibration process in three parts. First, optimizing an engine to create a base engine calibration at its ... The number of calibration variables requiring consideration has grown exponentially in recent years, making manual calibrations ... MathWorks also provides help to calibration engineers through the Model-Based Calibration Toolbox, which provides tools for ...
On-ground calibration. Although a number of on-board calibration sources are included in GOME-2, a thorough on-ground ... The instrument calibration is complemented by cross checking the results using the NASA sphere as calibration source and ... These calibrations are performed in a thermal vacuum chamber at the instrument calibration contractors site (TNO/TPD). ... Additional calibration includes:. *full characterisation of the straylight behaviour (adjusting the instrument to account for ...
With DAkkS calibration certificates, we document the calibration of reference workpieces, gauge blocks, spheres, setting rings/ ... Our calibration lab is accredited in accordance with DIN EN ISO/IEC 17025 and certified in accordance with ISO 9001:2000 VDA ... We assist you not only with the calibration of standard testing equipment, but also with sample parts, feasibility studies and ... If you have any questions, please contact your local representative about a calibration lab near you and its accreditations.. ...
WFC3 Photometric Calibration & Calibration Flux Ladder. 12700. Extending the Range & Precision of the Count Rate non Linearity ... Up to date calibration information is located in Howard Bushouses Calibration Plan webpage. This page contains links to the ... A summary of HST calibration in the current cycle, and a comparison with prior cycles, may be found on the HST Calibration Plan ... Finalize the flux calibration of the UVIS grism with similar spatial sampling as for the wavelength calibration ...
Our method uses images of the environment to calibrate the camera, without the use of any special calibration pattern, ...
When the calibration is completed, the trimmed DAC-element is switched back into the DAC-array and continues to take part in ... At the same time the next DAC-element is put into calibration mode. When all current sources of the array are trimmed, the ... W. Groeneveld, H. Schouwenaars, H. Termeer, A self calibration technique for monolithic high-resolution D/A converters. IEEE J ... Clara M. (2013) Advanced Current Calibration. In: High-Performance D/A-Converters. Springer Series in Advanced Microelectronics ...
Source for information on calibration graph: A Dictionary of Earth Sciences dictionary. ... calibration graph A plot of the line intensities (relative to the internal standard) of a set of samples with known intensities ... calibration graph A plot of the line intensities (relative to the internal standard) of a set of samples with known intensities ... www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/calibration-graph ...
ViewSonic Corporation, headquartered in Brea, California, is a leading global provider of computing, consumer electronics, and communications solutions.
Boom Sprayer Calibration FABE-520 boom sprayer, calibration Calibrating Boom Sprayers for Forestry Herbicide Application FABE- ... calibration, sprayers, tank mixing pesticides Proper Calibration and Operation of Backpack and Hand Can Sprayers FABE-531 ... calibration, sprayers, forestry, herbicide application How Much Chemical Product Do I Need to Add to My Sprayer Tank? FABE-530 ... calibration. Title (Click to Sort). Fact Sheet Number Tags ... calibration, backpack sprayers, hand can sprayers, spraying, ...
6. XRT Calibration Issues (ASCANews #5) * 2.3 ASCA source positions uncertainties. Recent calibration of the ASCA error circle ... ASCA Calibration Uncertainties. The in-flight calibration of the ASCA instruments is an on-going effort. This document ... That is, further calibration may not improve the accuracy of the spatial gain calibration. Users should be aware of this ... Calibration Uncertainties (Updated 2001 January 5). 1. General issues. * 1.1 Quantitative Assesment of CCD Radiation Damage A ...
In this lens calibration guide, discover when and how to perform this important maintenance step to produce the sharpest ... What is lens calibration?. Lens calibration, also known as autofocus calibration, is a method of fine-tuning where the focus ... Lens calibration tools and set-up.. To calibrate, you need a well-lit environment, a tripod, a flat surface and a subject to ... The calibration process involves taking a series of photos in a controlled way, so you can see exactly how your focus is off. ...
OSD Setup & Calibration. The OSD is the now familiar strip across the bottom of the screen seen in all AOC monitors. Its ... Calibration. The AG271QX ships in its Standard preset with Game Mode turned off. This offers fair picture quality, but there ... For best results, stick with the default Standard mode and try our calibration settings detailed below. The AG271QX needs a ...
Calibration sessions help ensure that performance appraisal ratings are accurate. Here are tips on getting managers onboard and ... Calibration Sessions. The objective of calibration sessions is to ensure that different managers apply similar standards in ... Calibration "makes it easier for managers to deliver honest but negative performance appraisals," Grote said. It also has the ... To work well, managers must be trained to prepare for and participate appropriately in a calibration session, and to ...
OSD Setup & Calibration. You access the full OSD with the third control key from the left. Icons pop up above the keys to ... Calibration. The S2417DG comes set to its Standard picture mode and that provides a reasonably accurate image with neutral ... That is the only slot that allows a white balance calibration. The other modes leave brightness and contrast available, but you ... and no contrast is lost from the calibration. ... Current page: OSD Setup & Calibration Prev Page Introduction ...
... its exposure in the American automotive electronics arena has to some extent been limited to the engine calibration area. A ... While the CAN Calibration Protocol or CCP is a reasonably well known standard in Europe that continues to gain acceptance, ... Introduction to CAN Calibration Protocol 2000-01-0389. While the CAN Calibration Protocol or CCP is a reasonably well known ... Product development Calibration Historical reference Technical review Vehicle drivers Computer software and hardware ...
Calibration solutions are used for external standard, internal standard, and standard addition approaches to quantitation. ... Calibration solutions are used for external standard, internal standard, and standard addition approaches to quantitation. ... Calibration solutions provide the basis for quantitation for most instrumental techniques. The instrumental responses for ...
An additional calibration facility located at the DOE Hanford Site near Richland, Washington, is managed by the DOE Office of ... Calibration facilities are located at the DOE Site and Grand Junction Regional Airport in Grand Junction, Colorado; Grants, New ... Users of the Grand Junction Regional Airport Large Area Calibration Pads need to provide advance notification to DOE. Due to ... Pad standards have large, flat surfaces suitable for calibration measurements with portable surface survey meters. Borehole ...
... Files and information regarding the ASCA calibrations are kept in the HEASARC Calibration Database ... Other SIS calibration files are also available from here. This file was last modified on Monday, 23-Jul-2001 15:46:38 EDT If ... Other GIS calibration files are also available from here. The ASCA SIS. * Background files for both SIS detectors are available ... The latest calibration files that are used by sisrmg (including sisph2pi_110397.fits, which is also used by sispi) are ...
The calibration of K-cells on Madge was performed by Chris Burrows using a Beam flux gauge to calculate beam equivalent ...
Inverse sensitivity values for UVIS2 are written to the keyword PHTFLAM2 but should not be used for flux calibration with ... The PHTFLAM2 values should *NOT* be used for flux calibration with calibrated data products from MAST, since calwf3 by default ... For UV filters with UVIS2 (F218W, F225W, F275W and F200LP), the PHTFLAM1 values should be used for flux calibration. These ... The inverse sensitivity values written to the PHOTFLAM image header keyword are the CORRECT values for flux calibration for all ...
The Academic Calibration Process (. ACP. ) is a process of external, discipline-led academic peer review that is undertaken in ... Academic Calibration Process works at Griffith, and how you can have your course calibrated or become a reviewer and calibrate ... Let us know if you have any questions or comments about the IRU Academic Calibration Process and well get back to you as soon ... Let us know if you have any questions or comments about being a reviewer for the IRU Academic Calibration Process and well get ...
This suite of calibration services provides calibrations of the free-field sensitivity of miniature hydrophones of the type ... The following calibrations are available, please enquire for special requirements:. * Magnitude calibration of a hydrophone ... the calibration of which is traceable back to the NPL Primary Standard laser interferometer. Multiple frequency calibration ... With the hydrophone calibration service established more than 30 years ago, NPL is in the best position to respond quickly to ...
Download RICADO Temperature Calibration and enjoy it on your iPhone, iPad and iPod touch. ... Read reviews, compare customer ratings, see screenshots and learn more about RICADO Temperature Calibration. ...
The calibration services of the National Institute of Standards and Technology (NIST) are designed to help the makers and users ... Calibrations. The calibration services of the National Institute of Standards and Technology (NIST) are designed to help the ... If you have questions about ordering a measurement service, please email the calibrations [at] nist.gov (Calibrations Group) or ... Shop for your Calibration Service on the New Storefront. On March 27, 2019, NIST introduced a new online shopping experience to ...
Class Calibration. java.lang.Object ij.measure.Calibration public class Calibration. extends java.lang.Object. Calibration ... Calibration. public Calibration(ImagePlus imp). Constructs a new Calibration object using the default values. Calibration. ... equals(Calibration cal). Compares two Calibration objects for equality.. double[]. getCoefficients(). Returns the calibration ... Calibration(). Constructs a new Calibration object using the default values.. Calibration(ImagePlus imp). Constructs a new ...
These calibrations are linear and are repeatable to within +/− 0.1% and +/− 0.5% full scale outputs for 202 k Pa and 1013 k Pa ... Pressure Sensor Sensor Block Copper Block Calibration Facility Cryogenic Engineer These keywords were added by machine and not ... Boyd C., Juanarena D., Rao M.G. (1990) Cryogenic Pressure Sensor Calibration Facility. In: Fast R.W. (eds) Advances in ... A cryogenic pressure sensor calibration facility has been set up at Pressure Systems, Inc. for calibrating cryogenic pressure ...
This presentation is made in an effort to impart information regarding the techniques used for the calibration of coordinate ... Calibration Calibration of CMMs Calibration Standards for CMMs * 14. Calibration Calibration of CMMs • In the scope of this ... Importance of Calibration * 12. Calibration Calibration of CMMs • The calibration of CMM benefits as per the stated benefits of ... Calibration • What is calibration? • Calibration standards for CMM • Calibration procedure for CMM • E&R Test • Introduction • ...
Calibration Services. Calibration Services. Purchasing is now managing all calibration service requests. Please follow this ...
  • The process of estimating the parameters of a real-world lens such that it would fit the pinhole camera model is called camera calibration (or camera resectioning , and it should not be confused with photometric camera calibration). (oreilly.com)
  • I've never really used the camera calibration function before but I did try the other day and found out that I don't seem to have any of the options the various LR4 video tutorials suggest I should. (cambridgeincolour.com)
  • Camera Calibration Profile refers to the profiles the camera makers add to their cameras such as Landscape, Portrait, etc. (cambridgeincolour.com)
  • Camera calibration may refer to: Camera resectioning, which is called also geometric camera calibration Color mapping, which is a method for photometric camera calibration Radiometric calibration This disambiguation page lists articles associated with the title Camera calibration. (wikipedia.org)
  • Since switching to Linux earlier this year, my desktop and laptop monitors have been uncalibrated because of my ignorance of how to do monitor calibration on Linux. (msdn.com)
  • Curiosity's sundial also has additional color calibration tools for the rover's Mastcam, which captured the image above on August 19 - the 13th "Sol" of the mission. (universetoday.com)
  • And a third is color calibration. (wired.com)
  • anyone here know anything about color calibration? (mail-archive.com)
  • The operational success of a "Test Shop" program set up at March AFB , California, on 15 September 1957, led to the establishment of the base-level Precision Measurement Equipment Laboratories providing the Air Force with a complete calibration system that could handle the increasingly stringent measurement needs of the new missile and aircraft systems. (wikipedia.org)
  • We offer complete calibration services for various measuring instruments. (intertek.com)
  • The calibration group is responsible for the complete calibration of TerraSAR-X. In addition to the development and the integration of the calibration functions for TerraSAR-X, all calibration activities including the planning, the coordination and the execution of the campaigns during the commissioning phase will be performed by the group. (dlr.de)
  • The complete calibration result is available here . (microsoft.com)
  • When the highest possible wavelength calibration or flatfielding accuracy is required (e.g. for radial-velocity studies or high S/N observations in the regime of CCD fringing) the use of attached calibrations at nighttime is possible (cf. (eso.org)
  • Wavelength calibration of GMOS is obtained using GCAL, the facility calibration unit. (gemini.edu)
  • The service uses a comparison method where the response of the test hydrophone is compared against a reference transfer standard hydrophone, the calibration of which is traceable back to the NPL Primary Standard laser interferometer. (npl.co.uk)
  • The calibration is traceable and repeated at regular intervals. (chalmers.se)
  • All calibrations are traceable to NIST standards (National Institute of Standards and Testing - the U.S. Government approved source for calibration data) if performed in San Diego, or to the UK National Standards if performed at our Certified Repair Depot in Scotland. (skf.com)
  • The calibration standard is normally traceable to a national or international standard held by a metrology body. (wikipedia.org)
  • To improve the quality of the calibration and have the results accepted by outside organizations it is desirable for the calibration and subsequent measurements to be "traceable" to the internationally defined measurement units. (wikipedia.org)
  • To communicate the quality of a calibration the calibration value is often accompanied by a traceable uncertainty statement to a stated confidence level. (wikipedia.org)
  • When observing in narrow-band filters, no night-time calibrations will be provided by the observatory. (eso.org)
  • W. Groeneveld, H. Schouwenaars, H. Termeer, A self calibration technique for monolithic high-resolution D/A converters. (springer.com)
  • The RASCAL algorithm for radiometric self-calibration takes as input a set of images of a static scene taken under different exposures and rough estimates of the exposure values used, and computes the radiometric response function of the imaging system as well as high dynamic range image of the scene. (columbia.edu)
  • The calibration services of the National Institute of Standards and Technology (NIST) are designed to help the makers and users of precision instruments achieve the highest possible levels of measurement quality and productivity. (nist.gov)
  • If you have questions about ordering a measurement service, please email the calibrations [at] nist.gov (Calibrations Group) or call 1-866-NIST-SHOP (or 1-866-647-8746). (nist.gov)
  • In-house calibration method, data reduction, error analysis and measurement corrections are described in Hjärne (2007), Chernoray and Hjärne (2008), Axelsson (2009), Arroyo (2009) and Rojo (2017). (chalmers.se)
  • By the end of 1962, the primary calibration labs and the Air Force Measurement Standards Laboratories were completed, consisting of four levels underground containing 20,000 square feet (1900 m²) of laboratory area. (wikipedia.org)
  • In 1965, the Air Force assigned management of the worldwide Precision Measurement Equipment Laboratories certification program to the Calibration and Metrology Division. (wikipedia.org)
  • Your company's procedures and processes, in particular those with ISO 9000 certifications, may require periodic calibration of your measurement equipment, and such rules may be applicable to your data collectors. (skf.com)
  • Our flexible and responsive calibration service for electronic test and measurement instruments means that you do not need to invest in expensive calibration instruments with the benefit of time and resource savings on registration and administration processes. (intertek.com)
  • Flexible and responsive calibration services for your electronic test and measurement equipment. (intertek.com)
  • We conduct all calibration services and related activities to recognised national and international measurement standards, complying with ISO/IEC 17025. (intertek.com)
  • The CD also contains various Excel Reports Calibration spreadsheets that automatically calculate errors and the relative measurement uncertainty for determining a calibrated instrument's compliance. (isa.org)
  • Calibrations that observe a reference celestial source , like a spectrophotometric standard star or a nearly-featureless star for the measurement of telluric lines. (eso.org)
  • The goal of the Elixir calibration is to provide the photometric equations parameters allowing the measurement of magnitudes in the Sloan system (SDSS). (hawaii.edu)
  • Reviews and analyzes tank calibration reports for accuracy and completeness with a thorough understanding of all field procedures, equipment and measurement methods. (rigzone.com)
  • By providing a first measurement surface capable of specifically binding a labelled reagent in an amount depending upon the presence of analyte in the sample and a second calibration surface capable of binding a second labeled reagent in a manner unaffected by the presence of analyte in the sample, calibration of individual tests can be accomplished simultaneously with the performance of the test itself. (google.ca)
  • A signal producing system includes an enzyme, a catalyst usually bonded to a mip which defines the first labeled reagent for binding to the measurement surface and the same catalyst conjugated to a ligand capable of binding to the calibration surface. (google.ca)
  • In measurement technology and metrology, calibration is the comparison of measurement values delivered by a device under test with those of a calibration standard of known accuracy. (wikipedia.org)
  • This definition states that the calibration process is purely a comparison, but introduces the concept of measurement uncertainty in relating the accuracies of the device under test and the standard. (wikipedia.org)
  • In many countries a National Metrology Institute (NMI) will exist which will maintain primary standards of measurement (the main SI units plus a number of derived units) which will be used to provide traceability to customer's instruments by calibration. (wikipedia.org)
  • The associated radiometric calibration uncertainty is less than 5%, with band 4 being the worst case and bands 1-3 showing uncertainties of around 3%, more details can be found here . (esa.int)
  • A presentation reporting the Landsat calibration / validation results on the temporal uncertainty of radiometric calibration of all Landsat sensors. (esa.int)
  • Our method uses images of the environment to calibrate the camera, without the use of any special calibration pattern, knowledge of camera motion, or knowledge of scene geometry. (microsoft.com)
  • The removable calibration/reference layer has predetermined optical characteristics that can be utilized to calibrate or reference the instrument. (google.com)
  • This book is written mainly for operators who verify and calibrate measuring instruments used in Quality Management Systems ISO 9001, Environment Applications ISO 14001, Automotive Industry ISO 16949, and Aviation Industry EN 9100. (isa.org)
  • For example, if you need to observe and flux-calibrate six targets in a filter that is not supported by the calibration plan of the instrument, you need to provide six OBs for photometric calibration to allow for the case in which each target is observed on a different night. (eso.org)
  • Some ENVISAT instruments use a set of characterisation and calibration algorithms that are run on acquired data outside of the PDS . (esa.int)
  • On March 27, 2019, NIST introduced a new online shopping experience to order Calibration services. (nist.gov)
  • Please note, also, that the accuracy with which you determine the position of your source (and how accurately it is centered in your extraction region) can also affect the accuracy of the calibration. (nasa.gov)
  • Calibration values and accuracy of the calibration are shown at each step. (appbrain.com)
  • Abstract-Calibration techniques allow the estimation of the intrinsic parameters of a camera. (psu.edu)
  • Our services include Temperature Calibration, Lab Calibration Services and Pressure and Vacuum Calibration. (slideshare.net)
  • Lee Billings, Scientific American , "The Earth Next Door," 24 Aug. 2016 Engine calibration enhancements have increased the V-8's output from 550 horsepower to 563. (merriam-webster.com)
  • I interviewed at Micro Precision Calibration (Grass Valley, CA) in April 2016. (glassdoor.com)
  • The state-of-the-art methodology for base engine calibration today is to use design of experiments (DoE) to create a statistical engine model, called a response surface model that is fitted from a sparse set of measurements. (sae.org)
  • The instrument calibration is complemented by cross checking the results using the NASA sphere as calibration source and measurements of scattered sky light offered to the instrument by light fibre. (esa.int)
  • Pad standards have large, flat surfaces suitable for calibration measurements with portable surface survey meters. (energy.gov)
  • This calibration has been validated by comparing MSS, TM, ETM+ and Landsat 8 OLI data based on measurements done over ground targets that are assumed to be stable, pseudo invariant sites. (esa.int)
  • The implementation of calibration and verification concepts requires algorithms and tools to perform specific measurements and analyses. (dlr.de)
  • Also acceptable would be a year as a field calibration technician taking the various measurements required to produce volume tables. (rigzone.com)
  • Since there are good observations of temperature and salinity available from satellites and buoys, foraminifera from the sediment trap are also being used to improve the calibration of foraminiferal chemistry and oceanographic parameters. (usgs.gov)
  • The CIO contributes to ongoing international research to improve the calibration curve. (rug.nl)
  • Stefani Sassos, Ms, Rdn, Cso, Good Housekeeping , "Everything You Need to Know About the New Peloton Bike+, According to Our Fitness Experts," 14 Dec. 2020 To make matters more complicated, the ALMA observatory recently identified an error in its calibration system that produced a spectrum of Venus with a lot of noise for Greaves and her colleagues to work with. (merriam-webster.com)
  • The latest calibration files that are used by sisrmg (including sisph2pi_110397.fits, which is also used by sispi ) are distributed with FTOOLS in the refdata area, but they can also be found here . (nasa.gov)
  • Our team members are technology specialists and strengthened with the industrial know-how that assists us to deliver latest calibration services with the assurance of high performance. (slideshare.net)
  • Check out the latest Calibration Engineer Jobs or see Calibration Engineer Salaries at other companies. (glassdoor.com)
  • First, optimizing an engine to create a base engine calibration at its various steady-state operating points, typically on a dynamometer test rig. (sae.org)
  • While the CAN Calibration Protocol or CCP is a reasonably well known standard in Europe that continues to gain acceptance, its exposure in the American automotive electronics arena has to some extent been limited to the engine calibration area. (sae.org)
  • A second method of calibration and configuration of an on-vehicle electronic system is to plug into a special calibration computer which can "down load" calibration and configuration data to the controller. (google.ca)
  • A signal generator of the system can provide a periodic calibration signal having a plurality of frequency components. (google.com)
  • Merriam-Webster.com Dictionary , Merriam-Webster, https://www.merriam-webster.com/dictionary/calibration. (merriam-webster.com)
  • light structure calibration (https://www.mathworks.com/matlabcentral/fileexchange/80401-light-structure-calibration), MATLAB Central File Exchange. (mathworks.com)
  • AFMETCAL ( Air Force METrology and CALibration Program Office ), located in Heath , Ohio is the primary manager of metrology services for the U.S. Air Force . (wikipedia.org)
  • The United States Air Force calibration program was initiated in January 1952 to comply with AF Regulation 74-2, which outlined policies and assigned responsibilities for managing the Air Force Metrology and Calibration (AFMETCAL) Program. (wikipedia.org)
  • In 1968, the 2802nd Inertial Guidance and Calibration Group was inactivated and replaced by the Aerospace Guidance and Metrology Center (AGMC). (wikipedia.org)
  • The Calibration and Metrology Division was changed to the Directorate of Metrology on 8 November 1968. (wikipedia.org)
  • The Air Force created the Air Force Metrology and Calibration Program Office (AFMETCAL) at Heath, Ohio, to manage metrology services for the Air Force, retain engineering authority for all calibrations performed in the PMEL labs throughout the Air Force, and manage the contractor operated Air Force Primary Standards Lab. (wikipedia.org)
  • Quality management systems call for an effective metrology system which includes formal, periodic, and documented calibration of all measuring instruments. (wikipedia.org)
  • These calibrations are performed in a thermal vacuum chamber at the instrument calibration contractor's site (TNO/TPD). (esa.int)
  • To access the new NIST storefront and shop for Calibration Services, click here . (nist.gov)
  • With our calibration services you can feel safe that your instruments always perform as expected. (intertek.com)
  • Our comprehensive certification and calibration services ensure that your products meet all relevant regulations, and compliance is recognised with the ISO 9001 certificate, valid for 12 months. (intertek.com)
  • Our calibration services for onshore and offshore oil and gas environments include support from our accredited laboratories and fully qualified engineers. (intertek.com)
  • Shared oil and gas pipelines instigate the need for independent calibration services. (intertek.com)
  • Engaging reliable calibration services assists oil and gas organisations in preventing drifting and inaccuracies and ensures that equipment continues to meet its manufacturer's specifications. (intertek.com)
  • Our calibration services will benefit your organisation through a full range of solutions and consultancy options, excellent communication channels, quality certification, offsite and onsite support and a global footprint in the oil and gas industry. (intertek.com)
  • Informing you of necessary equipment repair or replacement forms part of our calibration services. (intertek.com)
  • Saving you time, money and resources, working with us as your Total Quality Assurance calibration services partner will allow you to focus on core activities. (intertek.com)
  • Offering Calibration Services for our clients across the globe. (slideshare.net)
  • With our vast industry experience we offer satisfactory services to our clients such as Frequency Meter Calibration, Tach Dwell Meter Calibration, Universal Testing Machine Calibration, Pitch Micrometer Calibration, Groove Micrometer Calibration, Flange Micrometer Calibration, Depth Micrometer Calibration, Calibration Of Digital Manometer Instruments. (slideshare.net)
  • 1. +91-8079447805 Arrow Instruments Calibration http://www.nabllab.net/ We are engaged in offering Calibration Services for our clients across the globe. (slideshare.net)
  • 2. About Us Arrow Instruments Calibration established in 2002 has emerged as a well- established service provider, exporter, importer and trader of Calibration Services. (slideshare.net)
  • The calibration is performed in the environmentally conditioned room and our onsite our calibration services will not affect the production unit in any way. (slideshare.net)
  • The USNO provides precise and accurate calibration services to remote users around the world. (navy.mil)
  • With our torque tool calibration and repair services, we've seen a spike in electronics, automotive, and other industries seeking to maintain existing fastening tools in the face of cost-cutting,' states Eddie Silverberg. (prweb.com)
  • By providing products and services for both in-house calibration and repair, and a full-time torque calibration and repair staff at Flexible, the firm has been able to help with the increasing demand for these types of customer requests. (prweb.com)
  • The calibrations services listed check or characterize particular instruments, devices, and sets of standards. (gc.ca)
  • You can think of the calibration process in three parts. (sae.org)
  • The calibration process involves taking a series of photos in a controlled way, so you can see exactly how your focus is off. (adobe.com)
  • If you have any questions about the calibration process, selecting a course or being a reviewer, or you would like to discuss your possible involvement in the IRU Academic Calibration Process, please feel free to get in touch. (edu.au)
  • Which course would you like to apply the IRU Academic Calibration Process to? (edu.au)
  • The calibration process is fully automated. (chalmers.se)
  • The Calibration Certificate process is for newly purchased Sphygmomanometers [aneroids] and/or Thermometry Products only. (welchallyn.com)
  • Although oil and gas equipment calibration can be a time-consuming and costly business, test and process equipment requires this procedure for several reasons. (intertek.com)
  • The algorithm also provides a functional test of the control system during the calibration process. (google.ca)
  • Quick calibration process. (appbrain.com)
  • To do this, you should start the calibration software implementation process as a task with a methodical approach. (selfgrowth.com)
  • When looking for the best calibration software for small companies and creating a business case for evaluating solutions, the calibration workflow and the life cycle of the equipment and calibration process should be considered. (selfgrowth.com)
  • Two instruments at the end of the robotic arm on NASA's Mars rover Curiosity use the calibration targets attached to a shoulder joint of the arm. (universetoday.com)
  • The Calibration Group has been developing and operating the Calibration Facility Oberpfaffenhofen (CALIF), comprising various calibration targets like corner reflectors, transponders and ground receivers in L-, C- and X-band, and the required infrastructure for the preparation and execution of calibration campaigns over large test sites. (dlr.de)
  • The Institute is well equipped with three different types of calibration targets and maintains a laboratory for the precise adjustment of electronic devices. (dlr.de)
  • This must be done even if the same calibration star can be used for all the science targets. (eso.org)
  • However, AATSR is essentially a self-calibrating instrument, deriving calibration coefficients for the thermal and visible channels via its on-board calibration targets . (esa.int)
  • CALIB 4.4 uses the 1998 international calibration datasets. (washington.edu)
  • In Cycle 27 the WFC3 team will carry out an extended calibration program to monitor the behavior of the UVIS and IR channels and to provide the best calibration data for scientific programs. (stsci.edu)
  • Motivated by the different properties of each of the WFC3/UVIS e2v CCD detectors, UVIS photometric calibrations are now determined independently for each CCD. (stsci.edu)
  • Occasionally works in the field with Calibration Technician levels I or II, to include measuring tanks, barges, etc. (rigzone.com)
  • Whenever this does happen, it must be in writing and authorized by a manager with the technical assistance of a calibration technician. (wikipedia.org)
  • The core for our calibration and verification algorithms is the CALIX software, which is currently being upgraded for TerraSAR-X and ALOS. (dlr.de)
  • Therefore, there are no specific external calibration algorithms involved. (esa.int)
  • As with the other HST instruments, calibrations will be periodically updated through new observations campaigns every year. (stsci.edu)
  • Since P90 'concatenation containers' can be used within P2PP version 3 to link science and calibration observations that must be executed contiguously. (eso.org)
  • Please note that the SPHERE Standard Calibration Plan does not include any observations of night-time standard stars other than photometric and polarimetric standard stars in broad-band filters. (eso.org)
  • If such calibrations are required, OBs for these calibrator star observations will have to be prepared and submitted as part of the regular Phase 2 submission. (eso.org)
  • Baseline calibrations will be obtained for all observations, both queue and classical. (gemini.edu)
  • Scott Oldham, Car and Driver , "2021 Porsche Panamera Turbo S E-Hybrid Sport Turismo Flexes 690 HP," 7 Dec. 2020 In critical applications and recreational situations alike, headphone EQ calibration can make an astonishing difference in listener experience and overall enjoyment. (merriam-webster.com)
  • Popular Science , "Best headphones: Get good-quality audio equipment at your budget," 17 Dec. 2020 The presidential election required deft calibration to get along peaceably with relatives or friends with differing views. (merriam-webster.com)
  • Phoebe Wall Howard, Detroit Free Press , "Ford recalls 2021 E-series for burn risk, 2020-21 Explorer and Aviators for power loss," 23 Dec. 2020 Steering responses feel a hair crisper, as Toyota revised the steering calibration to make the effort buildup more linear as cornering loads increase. (merriam-webster.com)
  • David Beard, Car and Driver , "Tested: 2021 Toyota Supra 3.0 Gains Horsepower and Refinement," 17 Aug. 2020 With regular vigorous use over the past three months, the bike maintained its great condition and did not require re- calibration , though calibrating the bike is simple if needed. (merriam-webster.com)
  • I interviewed at Micro Precision Calibration (Tampa, FL) in March 2018. (glassdoor.com)
  • The calibration curve shows large deviations from the theoretical curve, probably because the earth magnetic field used to be weaker, enabling more cosmic rays to penetrate the atmosphere and enhancing the 14 C content. (rug.nl)
  • The in-flight calibration of the ASCA instruments is an on-going effort. (nasa.gov)
  • Since the ASCA database is huge, Guest Observers who, during the course of their analysis come across additional problems or anything that may contribute to our current knowledge of the calibration are encouraged to notify the ASCA GOF by using our Feedback form . (nasa.gov)
  • Files and information regarding the ASCA calibrations are kept in the HEASARC Calibration Database . (nasa.gov)
  • On this page we highlight some calibration files and articles that are most commonly required for ASCA analysis. (nasa.gov)
  • The latest Response Matrices are available from the ASCA calibration database . (nasa.gov)
  • Assists customers with questions/problems regarding tank calibration reports. (rigzone.com)
  • The resolution of the calibration matrices is down to 0.2° in pitch and yaw angles but are adjusted for each case. (chalmers.se)
  • The calibration of K-cells on Madge was performed by Chris Burrows using a Beam flux gauge to calculate beam equivalent pressures and a QCM to calculate rates of deposition. (warwick.ac.uk)
  • The inverse sensitivity values written to the PHOTFLAM image header keyword are the CORRECT values for flux calibration for all except the UV filters observed on UVIS2. (stsci.edu)
  • Inverse sensitivity values for UVIS2 are written to the keyword PHTFLAM2 but should not be used for flux calibration with calibrated data products retrieved from MAST, since calwf3 by default will scale the UVIS2 chip by the chip sensitivity ratio to match UVIS1. (stsci.edu)
  • Through DoE, we can still measure a reasonable amount of data in a reasonable amount of time to generate the calibration," said Di Martino. (sae.org)
  • In this cycle, two new calibration programs will supplement the standard monitoring data. (stsci.edu)
  • When the calibration is completed, the trimmed DAC-element is switched back into the DAC-array and continues to take part in the data processing. (springer.com)
  • Calibration objects contain an image's spatial and density calibration data. (nasa.gov)
  • A stand-alone data reduction script from Aeroprobe Corporation and calibrations performed by Aeroprobe Corporation are available for the commercial probes. (chalmers.se)
  • The calibration accuracy of Landsat data is under the responsibility of the National Aeronautics and Space Administration (NASA) Goddard Space Flight Center (GSFC), U. S. Geological Survey (USGS) Earth Resources Observation and Science Center (EROS) and South Dakota State University (SDSU). (esa.int)
  • A summary of issues and impacts to Landsat data is available under Calibration Notices section here . (esa.int)
  • Report templates that are useful for recording both the recorded instrument data and the experimental calibration data, used to evaluate the conformity of the instrument, are on a CD included with the book. (isa.org)
  • Creates tank calibration reports and enters the data in the appropriate computer program to generate final documents or tables for delivery to customer(s). (rigzone.com)
  • To create another calibration certificate return to the request page . (welchallyn.com)
  • Your device may be sent to a local Welch Allyn Repair Center for calibration, or visit the device product page to access the User Manual for instructions on performing a calibration check. (welchallyn.com)
  • Also this uncertainty is taken into account by calibration. (rug.nl)
  • To obtain consistent results over the complete workflow (input, processing, output) you need expensive tools (calibration) and expensive supplies (ink, paper). (dpreview.com)
  • Returns the calibration function coefficients. (nasa.gov)
  • This is because the current released calibration, including the boresights are designed to give certain results for the Crab (see above). (nasa.gov)
  • For best results, stick with the default Standard mode and try our calibration settings detailed below. (tomshardware.com)
  • We didn't have to make too many changes to achieve accurate results, and no contrast is lost from the calibration. (tomshardware.com)
  • I like to think of it in terms of 'a chain being only as strong as it's weakest link' - it's undeniably another expense, but if lack of calibration and profiling means that the results in all previous efforts and equipment are rendered 'sub-optimal' then perhaps it's ultimately more expensive not to have one? (cambridgeincolour.com)
  • The calibrated item is shipped back to the client, followed under separate cover by a report of the calibration results. (gc.ca)
  • Furthermore, various S/W tools for the analysis and modelling of a SAR system and for deriving calibration parameters have been developed and implemented and can be modified for future SAR systems. (dlr.de)
  • A calibration and configuration algorithm operates to establish the sensor ranges of all sensors installed and disables certain configurable features if the associated sensors are not present. (google.ca)
  • These and other objects are achieved by the present invention which includes a microprocessor which executes a hitch control algorithm and a calibration and configuration algorithm. (google.ca)
  • At the same time the next DAC-element is put into calibration mode. (springer.com)
  • Many cameras recognise the specific serial number assigned to a lens and will remember its calibration setting from the last time you set it. (adobe.com)
  • The average turnaround time for calibrations is 2 weeks. (npl.co.uk)
  • Ability to learn Saybolt tank calibration software applications through instruction provided by Saybolt within a reasonable time limit. (rigzone.com)
  • Unless otherwise stated, each service covers calibration of an item on a one time per request basis. (gc.ca)
  • DOE supports the development, standardization, and maintenance of calibration facilities for environmental radiation sensors. (energy.gov)
  • There's some fancy schmancy calibration sensors that can be turned around and put in a little stand. (msdn.com)
  • after calibration press pass and go back to leave Engineer Mode. (xda-developers.com)
  • Calibration Plans for each instrument and mode are described in detail in their corresponding User Manual , and their execution times are not charged to the Service Mode programmes. (eso.org)
  • If this is not the case, you must provide additional OBs for calibration appropriate for each mode not included in the Calibration Plan. (eso.org)
  • Lens calibration tools and set-up. (adobe.com)
  • Don't miss out on our special pricing on Renishaw Calibration Tools for Milling Machines. (constantcontact.com)
  • Maintenance and calibration were important, but have taken a new role as companies are seeking ways to extend the life of their tools. (prweb.com)
  • A fine culmination of facilities as well as sophisticated technology support, we together as a team ensure in successfully meeting calibration related demands of varied industries. (slideshare.net)
  • Operates the computer system as necessary, including Microsoft Word, Excel, Windows, E-mail functions or the equivalent, and the Saybolt tank calibration software, in order to successfully complete assigned tasks. (rigzone.com)
  • Calibrations to be executed in daytime are the most common examples in this category. (eso.org)
  • Lens calibration, also known as autofocus calibration, is a method of fine-tuning where the focus point falls in your image when you are autofocusing. (adobe.com)
  • 4. The method of claim 3 further comprising transmitting the calibration signal through an antenna placed at a fixed position with respect to the array elements. (google.com)
  • A sample with 14 C age of 150 year before present could have a real age of 20, 150, 220 or 270 year before present due to wiggles in the calibration curve, making the method less useful for the last few centuries. (rug.nl)
  • With DAkkS calibration certificates , we document the calibration of reference workpieces, gauge blocks, spheres, setting rings/mandrels, multi-sphere test standards, one-dimensional ball rails, measuring gauges, high-precision gauges and many other types of testing equipment. (zeiss.com)
  • The standard instrument for each test device varies accordingly, e.g., a dead weight tester for pressure gauge calibration and a dry block temperature tester for temperature gauge calibration. (wikipedia.org)