• 2007. Measurement of the stable isotope ratio of dissolved N2 in 15N tracer experiments. (msu.edu)
  • Stable isotope addition experiments seeking to trace the denitrification of combined forms of nitrogen (N) to gaseous N2 in aquatic environments typically need to measure the stable isotope ratio of dissolved nitrogen gas. (msu.edu)
  • This measurement presents challenges because of the potential for contamination of samples by N in air, and because field experiments conducted in situ often do not produce a marked enrichment in the isotope ratio of the N2 pool. (msu.edu)
  • This paper describes the methods for sampling and measurement of the N isotope ratio of dissolved nitrogen that were developed for the isotope addition experiments in the Lotic Intersite Nitrogen Experiment ( LINX ), a cross-site study examining N biogeochemistry in headwater streams. (msu.edu)
  • Isotope ratios were measured using a gas chromatograph interfaced to the isotope ratio mass spectrometer and equipped with custom sample entry system. (msu.edu)
  • Choosing isotope ratio detectors - why use a Daly? (environmental-expert.com)
  • For isotope ratio instruments, it's common to have multiple detectors in an instrument, usually used to measure ion beam intensities simultaneously rather than sequentially. (environmental-expert.com)
  • Isotope Ratio Features for Classification of Dissolution Events Using Effluents Measurements. (ornl.gov)
  • WS-CRDS systems are increasingly used to measure isotopic ratios of 13 C/ 12 C, D/H, 18 O/ 16 O in atmospheric gas phase measurements (3). (spectroscopyonline.com)
  • These measurements provide inputs for regional methane budget models, to constrain emissions with better source apportionment. (uea.ac.uk)
  • The experiments consist of kinetic (time- kinetic data is typically not sufficient to constrain the course) measurements after TGF-b stimulation under differ- parameter values to a single optimal solution, and multiple ent conditions: untreated cells and three cases in which parameter sets can explain the available data. (lu.se)
  • The objective of the study was to determine the association of dietary patterns, anthropometric measurements, and metabolic parameters with inflammatory markers in middle-aged and older adults with metabolic syndrome in Taiwan. (biomedcentral.com)
  • Multivariate logistic regression was performed to evaluate the association of dietary patterns, anthropometric measurements, and metabolic parameters with C-reactive protein (CRP) and neutrophil-to-lymphocyte ratio (NLR) in men and women with metabolic syndrome. (biomedcentral.com)
  • The purpose of our study was to explore the relationship between wrist ratio and sonographic CT measurements to (1) evaluate the reliability of sonographic CT measurements and (2) explore how external wrist measures relate to anthropometric features of the CT. (cdc.gov)
  • Test-negative designs are commonplace in assessments of influenza vaccination effectiveness, estimating this value from the exposure odds ratio of vaccination among individuals treated for acute respiratory illness who test positive for influenza virus infection. (nih.gov)
  • However, the relationship of the measured odds ratio to true vaccine effectiveness is poorly understood. (nih.gov)
  • We derived the odds ratio under circumstances of real-world test-negative studies. (nih.gov)
  • The odds ratio recovers the vaccine direct effect when 2 conditions are met: 1) Individuals' vaccination decisions are uncorrelated with exposure or susceptibility to the test-positive or test-negative conditions, and 2) vaccination confers "all-or-nothing" protection (whereby certain individuals have no protection while others are perfectly protected). (nih.gov)
  • When things are too big to draw on paper, scale factors are used to calculate smaller, proportional measurements. (teacherscollegesj.org)
  • The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF2 Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. (herts.ac.uk)
  • 50 μL are used for the simultaneous measurement of 3 electrolyte items. (fujifilm.com)
  • Waist-to-hip ratio is the circumference of the waist divided by the circumference of the hip. (medicalnewstoday.com)
  • The western dietary pattern, obesity, high body fat, high waist or hip circumference, and high waist-to-hip ratio were significantly associated with increased odds ratios of high CRP and NLR in both genders. (biomedcentral.com)
  • Body mass index, waist circumference, waist-to-height and waist-to-hip ratios were calculated. (who.int)
  • We report the origin of isotope fractionation induced by the choice of laser parameters and a method for accurate in situ determination of lithium (δ 7 Li) and boron (δ 11 B) isotope ratios in glasses and minerals using laser ablation multiple Faraday collector inductively coupled plasma mass spectrometry (LA-MFC-ICPMS). (rsc.org)
  • Therefore, the boron to carbon flux ratio (B/C) directly measures the average amount of interstellar material traversed by cosmic rays. (ams02.space)
  • This measurement is based on 2.3 million boron nuclei and 8.3 million carbon nuclei collected by AMS during the first 5 years of operation onboard the ISS. (ams02.space)
  • The AMS boron to carbon ratio (B/C) as a function of rigidity in the interval from 1.9 GV to 2.6 TV based on 2.3 million boron and 8.3 million carbon nuclei. (ams02.space)
  • The scale of drawings is described as a ratio using the notation: A distance at full size : The distance at the scale used that would be the same length. (teacherscollegesj.org)
  • However, this is a comparatively recent development, as can be seen from the fact that modern geometry textbooks still use distinct terminology and notation for ratios and quotients. (wikipedia.org)
  • This data set allows an accurate measurement of the atmospheric muon charge ratio between 50 and 400 GeV to be performed. (aps.org)
  • They say waist-to-hip ratio may be a more accurate indicator of risk of mortality from all causes. (medicalnewstoday.com)
  • They add that waist-to-hip ratio may be a more useful tool in healthcare interventions. (medicalnewstoday.com)
  • Waist-to-hip ratio may be a better tool for determining weight management than body mass index (BMI), according to a new study . (medicalnewstoday.com)
  • Research published this week in the journal JAMA Network Open reports that waist-to-hip ratio may be more useful than BMI in determining health risks and medical interventions. (medicalnewstoday.com)
  • They compared data on BMI, fat mass index, and waist-to-hip ratio. (medicalnewstoday.com)
  • Compared with BMI, [waist-to-hip ratio] had the strongest, most robust, and consistent association with all-cause mortality and was the only measurement unaffected by BMI. (medicalnewstoday.com)
  • Our results provide further support to shift public health focus from measures of general adiposity, such as BMI, to adiposity distribution using [waist-to-hip ratio]," the study authors added. (medicalnewstoday.com)
  • What is waist-to-hip ratio? (medicalnewstoday.com)
  • Waist-to-hip ratio does do a better job of capturing visceral fat , mid-body fat, waist fat, the fat that is most harmful in terms of all-cause and cause-specific mortality," Hunnes told Medical News Today . (medicalnewstoday.com)
  • However, thus far, relatively few measurements of δ 13 C CH4 in methane-enriched air have been made in the tropics. (uea.ac.uk)
  • A ratio scale is a quantitative scale where there is a true zero and equal intervals between neighboring points. (teacherscollegesj.org)
  • TDSCEM1 adds additional capability to Option 2C by allowing communication customers to perform quantitative measurements on their eye diagrams in addition to qualitative mask testing. (tek.com)
  • The numbers in a ratio may be quantities of any kind, such as counts of people or objects, or such as measurements of lengths, weights, time, etc. (wikipedia.org)
  • High systolic or diastolic blood pressure (BP), low high-density lipoprotein-cholesterol (HDL-C), high low-density lipoprotein-cholesterol (LDL-C), high total cholesterol (TC), high serum triglycerides (TG), and high fasting blood glucose (FBG) were significantly correlated with increased odds ratios of high CRP in both genders. (biomedcentral.com)
  • Low HDL-C, high LDL-C, high serum TG, and high FBG were significantly associated with increased odds ratios of high NLR in both genders. (biomedcentral.com)
  • This demonstration of easy access to precise measurement of δ 18 O and δD should further accelerate and diversify the use of stable isotopes, in fields as diverse as water cycle studies, bird migration mapping, and metabolic activity modeling and optimization, to name just a few. (spectroscopyonline.com)
  • Estimation of Sensor Measurement Errors in Reactor Coolant Systems Using Multi-Sensor Fusion. (ornl.gov)
  • The algorithm for the ratio model did not perform well in measuring V and H. The average errors for V and H were 33 cm and 6.5 cm, respectively. (cdc.gov)
  • The candidate particles, ranging from protons to nuclei as massive as iron, generate "extensive air-showers" (EAS) in interactions with air nuclei when en- tering the Earth's atmosphere. (lu.se)
  • Test and Measurement Equipment (T&ME) must be calibrated on a periodic basis to assure that it is operating within its specified parameters and if not, aligned so that it performs within its designed specifications. (transcat.com)
  • measurements available to infer the value of the parameters available. (lu.se)
  • The comparison between the accuracy of the Unit Under Test (UUT) and the accuracy of the standard is known as a Test Accuracy Ratio (TAR). (transcat.com)
  • Participants were excluded if they (1) were unable to lie down on the exam table, (2) were pregnant (or unsure if pregnant) at the time of their exam, or a urine could not be obtained to test for pregnancy, (3) had an implanted electronic medical device, or (4) were wearing a bandage or had lesions on the right side of their abdomen by the ribs (where measurements would be taken). (cdc.gov)
  • This presentation looks at traditional methods of strain measurement and the latest developments in automatic contacting and non-contacting extensometers. (slideshare.net)
  • In addition to the morphological information, the result of these two measurements is the so-called "strain index," representing a semiquantitative evaluation obtained by comparing the strain levels of different normal-appearing areas of the breast with the strain level of the lesion on the elasticity maps. (hindawi.com)
  • The ratio of absorbance at the 2 wavelengths (red-660nm, infra-red-940nm) is calculated and calibrated against direct measurements of arterial oxygen saturation to derive SPO2 reading. (who.int)
  • To perform the analysis of this measurement we developed a new methodology to correct the experimentally observed effect that the probabilities of detecting a fission reaction in the TAC and the micromegas detectors are not independent. (herts.ac.uk)
  • The Pythagoreans' conception of number included only what would today be called rational numbers, casting doubt on the validity of the theory in geometry where, as the Pythagoreans also discovered, incommensurable ratios (corresponding to irrational numbers) exist. (wikipedia.org)
  • A titer is a measurement of the amount or concentration of a substance in a solution. (medlineplus.gov)
  • The method monitors SPLs underneath the ear cup of a communication headset to provide a target speech signal-to-noise ratio without exceeding safe noise exposure thresholds. (cdc.gov)
  • A rate is a ratio that compares two quantities with different kinds of units. (teacherscollegesj.org)
  • A more specific definition adopted in physical sciences (especially in metrology) for ratio is the dimensionless quotient between two physical quantities measured with the same unit. (wikipedia.org)
  • In cases where a 4:1 TUR is necessary, the calibration provider may incur a substantial capital investment expense might lead to an increase in the calibration price, which is the other alternative: choosing to pay higher costs for better measurement assurance (and reduced risk). (transcat.com)
  • If these two instrument readings match exactly whereas the UUT has no error, the risk of the UUT making a measurement outside its specification is limited to its drift. (transcat.com)
  • Slide reagents after measurement are automatically discarded to the disposal box, minimizing the risk of contamination. (fujifilm.com)
  • External wrist ratio is not a proxy for internal carpal tunnel shape: implications for evaluating carpal tunnel syndrome risk. (cdc.gov)
  • Additionally, regression analyses combining participant factors and CT measurements produced models accounting for less than 15% of the variability in external wrist ratio (linear models) or correctly predicting less than 68% of wrist ratio-based risk categorization (logistic models). (cdc.gov)
  • Inertial measurement unit- (IMU) based wearable technologies are becoming popular as a tool to track whole body postures for ergonomic risk assessments. (cdc.gov)
  • A unit scale is a ratio that compares the dimensions of an actual object to the dimensions of a scale drawing or model that represents the actual object. (teacherscollegesj.org)
  • A minimum brightness measurement of 9.03 cd/m² is well below our practical floor of 50. (tomshardware.com)
  • In addition, an onboard wavelength monitor ensures that the absorption lines unique to H 2 16 O, H 2 18 O, and HD 16 O can be scanned repeatedly and precisely, providing both δ 18 O and δD data in one fast measurement. (spectroscopyonline.com)
  • MarketingProfs' comprehensive library of marketing measurement and metrics resources can help you harness the power of analytics and guide you in creating a data driven marketing strategy. (marketingprofs.com)
  • We compare the models meters where only a few (if any) have values that represent both to existing data (9,10) and to novel measurements first reliable estimates from experiments. (lu.se)
  • Two models were developed: a ratio model that uses only data from five sensors and a ratio and body segment length model that uses both sensor data and body segment length information. (cdc.gov)
  • The α ratio, obtained with slightly higher statistical fluctuations, was determined directly, without need for any reference cross section. (herts.ac.uk)
  • In addition, the TDSCEM1 extinction ratio measurement allows the user to determine the statistical population size before the measurement is performed. (tek.com)
  • At that setting, we measure a contrast ratio of 582:1, which registers lower than the display's typical 700:1 rating. (tomshardware.com)
  • We used sonographic imaging on a sample of healthy participants (n = 226) to measure CT cross-sectional area, depth, width, and depth/width ratio. (cdc.gov)
  • This example shows you how to obtain adjacent channel power ratio (ACPR) measurements using a WCDMA communications signal, according to the 3GPP™ TS 125.104 standard [1]. (mathworks.com)
  • Both the repeatability and the laboratory bias of the δ 7 Li and δ 11 B measurements using the new AVC protocol were better than 1‰ for samples containing a few tens to a few tens of thousands ppm Li and B. We also report significant local heterogeneity of up to several ‰ found in some basalt glasses, but not in NIST SRM 612 and 610. (rsc.org)
  • Both assays admitted similar ratios of intact to total HIV DNA, but IPDA found ~40-fold more intact proviruses. (nature.com)
  • Unlike on an interval scale, a zero on a ratio scale means there is a total absence of the variable you are measuring. (teacherscollegesj.org)
  • In this measurement the total error is ∼3% at 100 GV. (ams02.space)
  • Similarly, the ratio of lemons to oranges is 6:8 (or 3:4) and the ratio of oranges to the total amount of fruit is 8:14 (or 4:7). (wikipedia.org)
  • Over South America and Africa, O3 mixing ratios inside deep convective clouds often exceed 50 ppbv which are comparable to mean background (cloud-free) amounts and are consistent with higher concentrations of injected boundary layer/lower tropospheric O3 relative to the remote Pacific. (nasa.gov)
  • It is easily customized and can be readily taught, enabling consistent and accurate measurement of harm. (bmj.com)
  • You will be optimally equipped for measurements in the field and in the laboratory with this battery-operated measuring instrument with a stand plate. (environmental-expert.com)
  • ANSI /NCSL Z540-1-1994 states "The laboratory shall ensure that calibration uncertainties are sufficiently small so that the adequacy of the measurement is not affected" It also states "Collective uncertainty of the measurement standards shall not exceed 25% of the acceptable tolerance (e.g. (transcat.com)
  • Objective: This study aimed at reviewing the quality indicators for reporting critical international normalized ratio (INR) in a coagulation laboratory. (aku.edu)
  • Figure 2 shows the AMS B/C ratio together with recent results. (ams02.space)
  • Experts say weight-to-hip ratio is a more accurate way to determine overall health risks. (medicalnewstoday.com)
  • Measurements were made to determine bulk source inputs to the atmosphere, rather than to study individual processes. (uea.ac.uk)
  • Blood titer measurements can help determine medical treatment. (medlineplus.gov)
  • Baseband spectrum-analysis software, for filter response measurements etc. (qsl.net)
  • However, this ratio does not consider other potential sources of error in the calibration process. (transcat.com)
  • Another relevant question is the relationship between the Bolton ratio and the various types of malocclusion 1,7,12,14-18 . (bvsalud.org)
  • Is the ratio of the size of a model of an object to the size of the actual object? (teacherscollegesj.org)
  • The model shown is ruled out by this measurement. (ams02.space)
  • The elastography measurements were obtained in the NHANES Mobile Examination Center (MEC), using the FibroScan ® model 502 V2 Touch equipped with a medium (M) or extra-large (XL) wand (probe). (cdc.gov)
  • The analysis focuses in particular on nearly degenerate pairs of a and X state levels, energy differences between which can be highly sensitive to possible variations in the electron-to-proton mass ratio (cf. (nist.gov)
  • TDSCEM1 provides an extensive suite of additional measurements to support analysis and trouble-shooting beyond simple pass-fail testing. (tek.com)
  • Ozonesonde measurements in the tropics following convective activity also show very low concentrations of O3 in the upper troposphere. (nasa.gov)
  • The B/C ratio does not show any significant structures. (ams02.space)
  • In conclusion, the B/C ratio does not show any significant structures. (ams02.space)
  • From bounce rates to web analytics, lead scoring to click-through rates, measurements and metrics inform your decisions, enabling you to create more effective, targeted marketing campaigns. (marketingprofs.com)
  • According to Proffit 4 , although natural teeth have a good ratio in most individuals, part of the population (5%) has some degree disproportion in tooth size. (bvsalud.org)
  • Based on the TDS500D/700D family of Digital Phosphor Oscilloscopes (DPOs), Option 2C and various measurement accessories tailor the oscilloscope for engineers debugging, characterizing and verifying the compliance of communication systems to international standards. (tek.com)
  • External wrist ratio (depth/width >0.70) is a strong predictor of the development of CTS and has been suggested to be a proxy for internal carpal tunnel (CT) shape. (cdc.gov)
  • It is possible to trace the origin of the word "ratio" to the Ancient Greek λόγος (logos). (wikipedia.org)