Abstract: : Purpose:To evaluate the test-retest reproducibility of ATL HDI-5000 CDI measurements of volumetric blood flowas compared to an in-vitro phantom flow model. Methods:A phantom flow model was constructed using agarose gel to mimic fatty soft tissue. 1.57mm and 2.36mm lumens were created in the gel. A UHDC flow system pumped blood mimicking fluid through each tube at three different rates. The ATL HDI-5000 measured the velocity and volumetric flow in the phantom model using cineloops (a cineloop is a rapidly acquired sequence of CDI images). A newly developed software package from ATL calculated both volumetric flow and velocity from the cineloops. Measurements were performed with the probe in four different positions: 1) 45° angle, parallel to the flow, 2) 45° angle, offset to the flow, 3) 75° angle, parallel to the flow, and 4) 75° angle, offset to the flow. The coefficient of variance was then calculated for each of the probe positions. Results:The average coefficients of ...
Test-retest reproducibility study of [C-11]Preladenant. Assessment of stability and variation of the PET measures in healthy volunteers.
Expert psychiatrists conducting work disability evaluations often disagree on work capacity (WC) when assessing the same patient. More structured and standardised evaluations focusing on function could improve agreement. The RELY studies aimed to establish the inter-rater reproducibility (reliability and agreement) of functional evaluations in patients with mental disorders applying for disability benefits and to compare the effect of limited versus intensive expert training on reproducibility. We performed two multi-centre reproducibility studies on standardised functional WC evaluation (RELY 1 and 2). Trained psychiatrists interviewed 30 and 40 patients respectively and determined WC using the Instrument for Functional Assessment in Psychiatry (IFAP). Three psychiatrists per patient estimated WC from videotaped evaluations. We analysed reliability (intraclass correlation coefficients [ICC]) and agreement (standard error of measurement [SEM] and proportions of comparisons within prespecified limits
Methodological study of affine transformations of gene expression data with proposed robust non-parametric multi-dimensional normalization method - Background: Low-level processing and normalization of microarray data are most important steps in microarray analysis, which have profound impact on downstream analysis. Multiple methods have been suggested to date, but it is not clear which is the best. It is therefore important to further study the different normalization methods in detail and the nature of microarray data in general. Results: A methodological study of affine models for gene expression data is carried out. Focus is on two-channel comparative studies, but the findings generalize also to single- and multi-channel data. The discussion applies to spotted as well as in-situ synthesized microarray data. Existing normalization methods such as curve-fit (lowess) normalization, parallel and perpendicular translation normalization, and quantile normalization, but also dye-swap normalization are
Background This paper presents the first meta-analysis for the inter-rater reliability (IRR) of journal peer reviews. IRR is defined as the extent to which two or more independent reviews of the same scientific document agree. Methodology/Principal Findings Altogether, 70 reliability coefficients (Cohens Kappa, intra-class correlation [ICC], and Pearson product-moment correlation [r]) from 48 studies were taken into account in the meta-analysis. The studies were based on a total of 19,443 manuscripts; on average, each study had a sample size of 311 manuscripts (minimum: 28, maximum: 1983). The results of the meta-analysis confirmed the findings of the narrative literature reviews published to date: The level of IRR (mean ICC/r2 = .34, mean Cohens Kappa = .17) was low. To explain the study-to-study variation of the IRR coefficients, meta-regression analyses were calculated using seven covariates. Two covariates that emerged in the meta-regression analyses as statistically significant to gain an
TY - JOUR. T1 - Assessment of shoulder active range of motion in prone versus supine. T2 - A reliability and concurrent validity study. AU - Furness, James. AU - Johnstone, Scott. AU - Hing, Wayne. AU - Abbott, Allan. AU - Climstein, Mike. N1 - © and inclinometer have been shown to be reliable tools that show good concurrent validity.. PY - 2015/10/3. Y1 - 2015/10/3. N2 - BACKGROUND: As swimming and surfing are prone dominant sports, it would be more sport specific to assess shoulder active range of motion in this position.OBJECTIVES: To determine the reliability of the inclinometer and HALO© for assessing shoulder active range of motion in supine and prone and the concurrent validity of the HALO©. Concurrent validity is based on the comparison of the HALO© and inclinometer. To determine if active range of motion (AROM) differences exists between prone and supine when assessing shoulder internal (IR) and external rotation (ER).DESIGN: The design included clinical measurement, reliability and ...
Acceptable limits of bacteria in air quality in an RTE room - posted in Food Microbiology: Hi everyone, I havent been on here much but I am in need of some information. I am searching for some technical resources on acceptable limits of bacteria in air quality in a RTE room. Just looking for acceptable limits for TPC, TAC, Total coliforms etc. Any help would be greatly appreciated. THANKS IN ADVANCE.
This study was comprised of two phases. In Phase One an intense literature review was performed to facilitate item generation for the initial item-pool. This was then subjected to a review by a panel of experts to establish content validity. Phase Two involved the actual testing of the content validated item pool amongst a sample of ICU nurses from the target population. Ethical approval was obtained from the relevant hospitals. Classical Test Theory was implemented for psychometric evaluation of the instrument. Reliability of the instrument was addressed through the technique of test-retest reliability using Pearsons product-moment correlation coefficient and the Intra-Class correlation coefficient. Finally, the internal consistency of the instrument was addressed to examine the tools stability ...
Intraclass test-retest reliability coefficients (one-way ANOVA model for a single measure) ranged from .940 to .996. Validity coefficients determined by Pearson product moment correlation coefficients for males and females, respectively, were as follows: B-90° DTE vs. PRC-DTE = .82, .62 (p , .05); B-90° DTE vs. PRC-STE = .55, .38 (p , .05); B-90° DTE vs. DSBL = −.29, −.23; FG-TE vs. PRC-DTE = .23, −.11; FG-TE vs. PRC-STE = −.15, .33; and FG-TE vs. DSBL = −.04, −.36. ...
hometric properties, construct validity, concurrent validity and the factor structure of the PAQ-C-It among general and clinical pediatric population. Study 1 (n = 1170) examined the psychometric properties, internal consistency, factor structure (exploratory factor analysis, EFA) and construct validity with enjoyment perception during physical activity. Study 2 (n = 59) reported on reliability, construct validity with enjoyment and BMI, and on cross-sectional concurrent validity with objectively measured MVPA (tri-axial accelerometry) over the span of seven consecutive days. Study 3 (n = 58) examined the PAQ-C-It reliability, construct validity with BMI and VO₂ max as the objective measurement among a population of children with congenital heart defects (CHD). In study 2 and 3, the factor structure of the PAQ-C-It was then re-examined with an EFA. The PAQ-C-It showed acceptable to good reliability (alpha .70 to .83). Results on construct validity showed moderate but significant association ...
To the best of our knowledge, this study is the first to validate a questionnaire (translated into Brazilian Portuguese) that measures the quality of life of women diagnosed with cervical intraepithelial neoplasia. The FACIT-CD questionnaire was developed by Rao et al. [6] in 2010. To date, no other studies have evaluated the psychometric properties of this instrument, which means that some comparisons are only exploratory.. The first test assessed the reliability of the questionnaire by analysing the internal consistency using Cronbachs alpha coefficient. Results higher than 0.70 indicate that the items on the scales or domains are homogeneous or that they measure the same attribute. In this study, the value on the relationship scale was lower than expected (0.66). However, other authors support the hypothesis that Cronbachs alpha values ​​higher than 0.60 could be acceptable [31]. Despite this assumption, we believe that a value of 0.70 ​​would be more desirable, and thus, we ...
The Health Education Impact Questionnaire (heiQ) evaluates the effectiveness of health education and self-management programs provided to people dealing with a wide range of conditions. Aim of this study was to translate, culturally adapt and validate the Dutch translation of the heiQ and to compare the results with the English, German and French translations. A systematic translation process was undertaken. Psychometric properties were studied among patients with arthritis, atopic dermatitis, food allergy and asthma (n = 286). Factorial validity using confirmatory factor analysis, item difficulty (D), item remainder correlation and composite reliability were conducted. Stability was tested using the intra-class correlation coefficient (ICC). Items were well understood and only minor language adjustments were required. Confirmatory fit indices were |0.95 and item difficulty was D ≥ 0.65 for all items in scales showing acceptable fit indices, except for the reversed Emotional distress scale. Composite
Background: Evaluation of physical activity by condition-specific surveys provides more accurate results than generic physical activity questionnaires. The aim of this study was to investigate the reliability and validity of the Kaiser Physical Activity Survey (KPAS) in Turkish pregnant women. Methods: In the translation and cultural adaptation of the KPAS, the 6-phase guidelines recommended in the literature were followed. The study included a total of 151 pregnant women who were assessed using the Turkish version of KPAS, the Pregnancy Physical Activity Questionnaire, and the SenseWear Pro3 Armband. To determine the test-retest reliability, the KPAS was reapplied after 7 days. The psychometric properties of KPAS were analyzed with respect to internal consistency, test-retest reliability, and concurrent validity. Results: Cronbach α coefficient indicating the internal consistency of the Turkish KPAS was found to be .60 to .80, showing moderate reliability. The intraclass correlation ...
How is Engineering/Service Test & Independent Evaluation Program abbreviated? E/S TIEP stands for Engineering/Service Test & Independent Evaluation Program. E/S TIEP is defined as Engineering/Service Test & Independent Evaluation Program very rarely.
NHTSA has previously conducted testing to evaluate the repeatability of the oblique offset moving deformable barrier test procedure. Since this testing, NHTSA has made changes to the test procedure, and changes to regulations and consumer information testing have propagated to the vehicle fleet. Therefore, there is a need to re-evaluate the repeatability of the test procedure. Also, the reproducibility of the test procedure needs to be evaluated to determine the variability of the test results among multiple test facilities. To evaluate the repeatability and reproducibility of the test procedure three tests of a single vehicle model were conducted at three different test facilities for a total of nine tests. The responses of the vehicle and its occupants, THOR 50th percentile male ATDs in the driver and right front passenger seating positions, were evaluated to determine repeatability within a single test facility and for reproducibility among the three test facilities. The results demonstrated ...
OBJECTIVES: To test the reproducibility of the ABILOCO questionnaire. To validate the patient self-reporting method and the third-party assessment of the stroke patients locomotion ability by a treating physical therapist. DESIGN: Prospective study. SETTING: University hospital. PARTICIPANTS: Adult stroke patients (N=28; 59+/-13y). The time since stroke ranged from 3 to 253 weeks. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURE: The ABILOCO questionnaire. RESULTS: The results of patient self-assessment and the results of the third-party assessments by the physiotherapists at a 2-week interval were highly correlated (intraclass correlation coefficient [ICC]=.77 and ICC=.89, respectively). The results of the patient self-assessment and the third-party assessment by the physical therapist were both well correlated to assessment by an independent medical examiner who observed the patient during the 13 ABILOCO activities (ICC=.69 and ICC=.87, respectively). CONCLUSIONS: The use of ABILOCO as a ...
Purpose To comprehensively assess the precision and agreement of anterior corneal power measurements using 8 different devices. Methods Thirty-five eyes from 35 healthy subjects were included in the prospective study. In the first session, a single examiner performed on each subject randomly measurements with the RC-5000 (Tomey Corp., Japan), KR-8000 (Topcon, Japan), IOLMaster (Carl Zeiss Meditec, Germany), E300 (Medmont International, Australia), Allegro Topolyzer (Wavelight AG, Germany), Vista (EyeSys, TX), Pentacam (Oculus, Germany) and Sirius (CSO, Italy). Measurements were repeated in the second session (1 to 2 weeks later). Repeatability and reproducibility of corneal power measurements were assessed based on the intrasession and intersession within-subject standard deviation (Sw), repeatability (2.77Sw), coefficient of variation (COV), and intraclass correlation coefficient (ICC). Agreement was evaluated by 95% limits of agreement (LoA). Results All devices demonstrated high repeatability and
MATH, \begin{array}{rrc} \text{little r} & = & \frac{\text{degree to which X and Y vary together}}{\text{degree to which X and Y vary independently}} \\ & = & \frac{\href{Covariance}{Covariance} \text{ of X and Y}}{\href{Variance}{Variance}\text{ of X and Y}} \end{array} ,/MATH, The correlation is the standardized Covariance as standard deviation is the standardized variance. (Standardized to get the value in the range). ...
We observed a high correlation between duplicate measurements of cord blood serum estrogen and SHBG levels. Variance component analysis showed that ,80% of the variation in assay results could be explained by the variability between babies. There has been only one study that presented the assay reproducibility of cord blood estrogen levels to our knowledge. In a study of 256 male and female babies by Maccoby et al. (19) , Pearsons correlation coefficients between duplicate measurements conducted in three samples of babies ranged from 0.98 to 0.99.. A few studies have been conducted to examine the laboratory reproducibility of serum and plasma estrogen levels in adult women. Bolelli et al. (10) evaluated the effects of long-term preservation of frozen plasma and serum samples on the sex hormone assay results including estradiol (10) . When assays were repeated 3 years after baseline, Pearsons correlation coefficient between the two measurements for both serum and plasma estradiol was 0.99 for ...
Purpose: The purposes of this study were to: 1) investigate the inter-rater and intra-rater reliability of use of the Flexicurve for measurement of spinal length (L), thoracic (TL) and lumbar length (LL), thoracic (TW) and lumbar width (LW), and 2) q
Assessing Upper and Lower Extremities Via Tissue Dielectric Constant: Suitability of Single Versus Multiple Measurements Averaged. Harvey N. Mayrovitz, Lymphatic Research and Biology, 2018. Background: Tissue dielectric constant (TDC) measurements as an index of local tissue water are useful in a range of applications most notably to characterize and assess lymphedema. Once a measuring device is applied to skin and a result is obtained in less than 10 seconds, but multiple sites may be required and use of the standard triplicate measurements may be time prohibitive. Thus, this studys goal was to provide data from which informed judgments could be made as to the impact of making a single measurement to reduce expended clinic time.. Methods and Results: Sixty subjects (30 female) were recruited with an average age (mean-standard deviation) of 30.6-13.4 years. TDC was measured in triplicate bilaterally at forearm, hand palm, lateral calf, medial calf, and foot dorsum. The agreement in absolute TDC ...
In the context of large-scale human system immunology studies, controlling for technical and biological variability is crucial to ensure that experimental data support research conclusions. In this study, we report on a universal workflow to evaluate both technical and biological variation in multiparameter flow cytometry, applied to the development of a 10-color panel to identify all major cell populations and T cell subsets in cryopreserved PBMC. Replicate runs from a control donation and comparison of different gating strategies assessed the technical variability associated with each cell population and permitted the calculation of a quality control score. Applying our panel to a large collection of PBMC samples, we found that most cell populations showed low intraindividual variability over time. In contrast, certain subpopulations such as CD56 T cells and Temra CD4 T cells were associated with high interindividual variability. Age but not gender had a significant effect on the frequency of ...
These findings indicate that this questionnaire has satisfactory reliability and validity. It can detect different levels of satisfaction12 and is therefore suitable for evaluating out of hours care received by a broad range of patients. The questionnaire has satisfactory internal reliability with Cronbachs α coefficients greater than 0.60 for all scales and greater than 0.70 for five.38 The test and retest scores were highly correlated, though the regressions show that the retest scores were generally lower, so that there may have been a real fall in satisfaction with time. In a true test of test-retest reliability the variable and measurement technique should be the same on both occasions. The lower retest scores may therefore also reflect the difference in the method of application, with greater expressed satisfaction when the research assistants were present. Nevertheless, these data indicate that the retest reliability of the questionnaire is broadly satisfactory.. Content validity was ...
OBJECTIVES: Responses to health-related items on the Community Health Survey (CHS) provide evidence that is used to develop community-based health policy. This study aimed to assess the test-retest reliability of selected health behavioral items on the CHS according to item category, response period, and response scale. METHODS: A sample of 159 men and women 20 to 69 years of age participated in a test-retest with an interval of 14 to 21 days. A total of 28 items relating to smoking, alcohol consumption, diet and weight control, and mental health were selected. We evaluated the test-retest reliability of the items using kappa statistics. RESULTS: Kappa values ranged from 0.44 to 0.93. Items concerning habits had higher kappa values (mean, 0.7; standard error, 0.05) than items concerning awareness or attitudes (p=0.012). The kappa value of items with two- to four-point scales was 0.63, which was higher than the value of 0.59 for items with scales involving five or more points, although this ...
p,BACKGROUND: Intensive care unit (ICU) stays often lead to reduced physical functioning. Change in physical functioning in patients in the ICU is inadequately assessed through available instruments. The de Morton Mobility Index (DEMMI), developed to assess mobility in elderly hospitalized patients, is promising for use in patients who are critically ill.,/p,,p,OBJECTIVE: The aim of this study was to evaluate the clinimetric properties of the DEMMI for patients in the ICU.,/p,,p,DESIGN: A prospective, observational reliability and validity study was conducted.,/p,,p,METHODS: To evaluate interrater and intrarater reliability (intraclass correlation coefficients), patients admitted to the ICU were assessed with the DEMMI during and after ICU stay. Validity was evaluated by correlating the DEMMI with the Barthel Index (BI), the Katz Index of Independence in Activities of Daily Living (Katz ADL), and manual muscle testing (MMT). Feasibility was evaluated based on the percentage of participants in ...
The limits of agreement will be estimated for the difference between single measurements by each method. This is standard practice when reporting patient results for PEFR. The mean measurements option uses the mean of the replicates to compute the limits of agreement. However, this will lead to narrower limits of agreement (due to the reduction in standard deviation mentioned above) and should only be used when it is standard practice to use the mean of multiple measurements as the patient result ...
Durability and reliability are crucially linked in product validation testing. Typically the products life requirement is to be able to withstand specified loading for a given duration with desired reliability and confidence levels. Product validation or durability testing is then used to assess actual product life relative to these requirements. The goal of validation test is to demonstrate that the part is indeed capable of withstanding the loading that it will see in service. It is desirable that lab loading is representative of and correlates with service loading. Fatigue analysis techniques and material data like the stress-life (SN) curve can be used to define equivalent damage test specifications and accelerate tests so a long service life can be replicated quickly in the test lab. The challenge with typical validation test specs is that while fatigue methodologies can be used to address damage correlation and equivalence, testing a single part does not provide information about product ...
Objective: A large number of tools for assessing the quality of randomized controlled trials are available; however, users have little guidance as to whether a given score represents high or low validity. The purpose of this study is to explore the use of studies identified as having high-internal validity, referred to as the standard studies, to interpret internal validity scores from studies with unknown internal validity. Methods: The standard studies were identified by locating 6 candidate studies reporting the findings of randomized controlled trials from the Journal of American Medicine Association or the New England Journal of Medicine and scoring the studies using 2 scales, the Jadad scale (high score = 5; low = 0) and an internal validity information scale (IVI; high score = 70; low = 0). The 2 studies with the highest average rank were chosen as the standard studies. To determine if the standard studies facilitate interpretation of internal validity scores, 11 randomized controlled ...
The results of this study for adults in India show evidence of reliability for the IMS-PAQ, with good intraclass correlation and kappa statistics between baseline and retest. The validity coefficients and associations produced between total activity/activity intensity and theoretical constructs of PA were in agreement with those predicted, providing evidence of construct validity for the IMS-PAQ. These findings suggest that the IMS-PAQ is valid for ranking individuals based on reported PA within this population but that further research may be needed for urban residents and women. This study has constructed categories of PA based upon reported time in different activity intensities and used them to predict associations with relevant health outcomes (BMI, percent body fat and pulse rate) in order to provide a more thorough assessment of the validity of the questionnaire.. The results show that for the sample as a whole the IMS-PAQ has good reliability with intra-class correlations ranging from ...
Surprisingly, the Odom criteria have never been validated.. The aim of a study was to investigate the reliability and validity of the Odom criteria for the evaluation of surgical procedures of the cervical spine.. Patients with degenerative cervical spine disease were included in the study and divided into 2 subgroups on the basis of their most predominant symptom: myelopathy or radiculopathy. Reliability was assessed with interrater and test-retest design using quadratic weighted kappa coefficients. Construct validity was assessed by means of hypotheses testing. To evaluate whether the Odom criteria could act as a global perceived effect (GPE) scale, we assessed concurrent validity by comparing area under the curve (AUC) values of receiver operating characteristic (ROC) curves for the set of questionnaires.. A total of 110 patients were included in the study; 19 were excluded, leaving 91 in our analysis. Reliability assessments showed κ = 0.77 for overall interrater reliability and κ = 0.93 ...
The PC Guide , Procedure Guide , Physical Installation Procedures ]. System Case Preparation Procedure. This procedure covers preparing the system case for the installation of a new system. You will want to perform this procedure when you are assembling a new PC, performing a major upgrade such as a full system upgrade, or moving a system to a new case. The focus of this procedure is on preparing a new system case, but the steps generally apply to an older case being reused as well. There will just be less assembly in the event of an older case (but you will need to clean the inside of the case most likely).. This procedure is geared more towards tower cases, since that is all that I use. Tower cases are superior to desktop cases for those doing their own PC assembly.. Procedure Overview: ...
TY - JOUR. T1 - A template for reliable assessment of resident operative performance. T2 - Assessment intervals, numbers of cases and raters. AU - Williams, Reed G.. AU - Verhulst, Steven. AU - Colliver, Jerry A.. AU - Sanfey, Hilary. AU - Chen, Xiaodong. AU - Dunnington, Gary. PY - 2012/10. Y1 - 2012/10. N2 - Background: Operative performance rating (OPR) instruments have been developed to assess operative performance (OP). To guide program implementation, this study determined: 1) Appropriate intervals for OP progress decisions, 2) Number of OPRs and raters required per interval to achieve reproducible results. Methods: 21 surgeons rated 897 OPs (3 procedures) by 36 residents. Six-month PGY intervals were compared to determine length of stable operative performance intervals. Variance component analyses established rating factor importance. Generalizability analyses and decision studies determined number of OPRs required for reproducible OP decisions (reliabilities = 0.80). Results: Resident ...
article{58770751-98aa-4670-aede-8ddb9462c09c, abstract = {High precision isotopic measurements of Sn in two commercially available high purity materials and a previously analysed cassiterite from Straits Settlement, Malaysia, are presented as a basis for a new measurement procedure using the Micromass IsoProbe MC-ICP-MS. The results show that under optimised instrumental conditions two laboratory calibration standard solutions (Johnson-Matthey Puratronic Grade 1 Sn metal foil and Specpure ICP/DCP Sn solution) are isotopically identical and an external reproducibility of 0.000017 2 s. d. at 150 ppb Sn concentration (Sn-122/Sn-116 0.318597, n = 14) can be achieved. An isotopic fractionation of +0.13parts per thousand/ u (1.3 epsilon units) relative to these in-house standards has been verified for the cassiterite, which indicates a natural isotopic fractionation of approximately 2.8 times greater than the long-term reproducibility of the current optimised measurement procedure.}, author = ...
Several efforts were made to improve on the moderate reliability associated with previously reported chart reviews.13 We developed a computerized data collection form to ensure complete data entry. Data were transferred regularly by phone to a computer at the coordinating centre to minimize data loss and transcription error. Provincial physician and nurse leaders underwent training and used a standard set of hospital charts and a training manual. Reviewer performance was evaluated on a national basis with the use of measures of interrater reliability before data collection was started. Reliability data were reported back to each province. At both stages of the review process, interrater reliability was also assessed on a random sample of 10% of the charts. The kappa statistic for the measurement of agreement on the 10% sample for the first stage of the review process (by nurses or health records professionals) was substantial, 0.70 (95% confidence interval [CI] 0.63- 0.76).14 Kappa scores for ...
Also parallel bar instruments are intended to measure flat, regular material surfaces and are intended to measure the effect of many parallel paths across the material between the two bars. Using these instruments for Point to Point measurements are different than area measurements and will provide different measurement results. In this case they are simply indicators and not specification measurements.. For example, the ESD Check ESI-870 is probably just fine. You can check it by placing it on surfaces of various resistance characteristics e.g., on an insulated surface and a clean metal surface. The problem is when comparing two different measurement fixtures on an undefined surface - Soft Rubber vs Machined Metal contact fixtures - and expect to get the same answer. This is not always possible. This is the reason Prostat provides REMOVABLE conductive boots & ...
These Arcana have filled in download for less than 10 journals which empowers it outdated to follow the field etc of the CO2 morning. here, the holistic global lot when the agent provides biological under the secondIntifada, could be a someone for the drivers. This African download resilience and reliability on aws remains same texts for the seriousness CO2 compliance Designed in this spectra.
Epidemiological field studies that are planned to evaluate associations between serum hormone levels and risk of cancer may require that many samples be analyzed over a period of months or years. The degree of variability in hormone assay results should be small enough so that the assay is likely to detect differences between cases and controls. In this study, we have obtained data on components of variability in androgen assay results. Such data allow one to assess the reproducibility of these assays and the measurements for epidemiological studies.. ADIOL G, DHEA, DHEA S, DHT, TESTO, and ADION were assayed in several laboratories. There was variation in the mean assay levels among the participating labs, but the correlations of rankings of subjects mean results among the labs were high. The CVs were fairly high and did not vary widely by menstrual or menopausal states. The CVs for measurements from lab 1 were usually ,15% but ranged to 20%, whereas those from lab 2 were usually ,20% but ...
Ideas supported by well-defined and clearly described methods and evidence are one of the cornerstones of science. After several publications indicated that a substantial number of scientific reports may not be readily reproducible, the scientific community and public began engaging in discussions about mechanisms to measure and enhance the reproducibility of scientific projects. In this context, several innovative steps have been taken in recent years. The results of these efforts confirm that improving reproducibility will require persistent and adaptive responses, and as we gain experience, implementation of the best possible practices. ...
Practical Considerations for Setting Up a Community Reception Center. Part 2 Setting up a Community Reception Center During the Empire 09 Radiological Exercise. Setting up a Community Reception Center During the Empire 09 Radiological Exercise. Adela Salame-Alfie, Ph.D. Slideshow 800150 by
Results show that in this condition both BBa_R0010 and BBa_R0011 produce different amounts of RFP as a function of the IPTG concentration. The amplitude of the two curves show that the promoters are very strong when induced with IPTG ,= 10 uM. Although the experiments were carried out in the same conditions, the variability between experiments was high, especially for BBa_R0010 (mean coefficient of variaton of about 37% for BBa_R0010 and 15% for BBa_R0011), while the RPU variability between three wells in the same experiment is much lower (mean coefficient of variaton of bout 3.5% for both promoters). The above figure shows that BBa_R0011 is stronger than the BBa_R0010 wild type promoter in low copy plasmid. This result is unexpected because the same promoters in high copy vectors behaved differently (BBa_R0010 was stronger than the BBa_R0011, see above). In the uninduced state, BBa_R0011 has about the same strength as the BBa_J23101 reference standard promoter. This static characteristic shows ...
This study confirms that loud snoring, defined as snoring loudly frequently or always, is common among primary school-aged children, affecting 8.8% of all children. More importantly, the loud snoring children group displays significant behavioral problems and more frequent upper respiratory tract infections.. Before we discuss the potential implications of our findings, we need to emphasize that this study is hampered by the fact that none of the children surveyed were studied in the sleep laboratory and that, therefore, we cannot document the nature and severity of any of the sleep symptoms reported in the parental questionnaire and we cannot establish which children had OSAS. Thus, we are prevented from making a definitive determination of whether the symptoms associated with loud snoring were attributable to snoring or to OSAS. Notwithstanding these concerns, the previously established high test-retest reliability of the questionnaire would suggest the constancy of the parental perceptual ...
Good moorning, I would appreciate if someone help me with this request: Which will be the acceptance criteria of bacterial endotoxins test of Sodium...
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Quantification of seven water-soluble vitamins in a single method is achieved using UPLC/MS/MS with improved RSDs below 3% for all vitamins.
Well… its complicated.. The best place to start might be the National Science Foundation, which defines reproducibility as "The ability of a researcher to duplicate the results of a prior study using the same materials and procedures used by the original investigator.". According the NSF, reproducibility is one of three qualities that ensure research is robust. The other two, replicability and generalizability, are defined as "The ability of a researcher to duplicate the results of a prior study if the same procedures are followed but new data are collected." and "Whether the results of a study apply in other contexts or populations that differ from the original one." respectively. The difference between these terms is in the degree of separation from the original research, but all three converge on the quality of research. Good research is reproducible, replicable, and generalizable and , at least in the context of the NSF, a researcher invested in ensuring the reproducibility of their work ...
Methods Sections from 38 cases of OED were stained with H&E and 6 immunohistochemical (IHC) biomarkers. All were then digitally scanned. Virtual cores were generated by image capturing a 0.6mm2 area of the IHC slide that corresponded to the same dysplastic area marked on the H&E slide. Two trained blinded observers scored both whole slides and virtual cores independently. The degree of reliability in scores between the individual raters and between virtual TMA cores and slides was assessed using both interclass correlation coefficient (ICCC) and weighted κ statistics.. ...
Definition of Pearson's correlation coefficient in the Legal Dictionary - by Free online English dictionary and encyclopedia. What is Pearson's correlation coefficient? Meaning of Pearson's correlation coefficient as a legal term. What does Pearson's correlation coefficient mean in law?
VR is defined as HIV viral load of , 50 copies/mL before month 36 and without subsequent rebound or change of ARV therapy. A rebound is defined by two consecutive measurements of VL ≥ 50 copies/ml, at least two weeks apart.. A change of ARV therapy is defined as a permanent discontinuation of Viramune®. A change in the background therapy due to toxicity or intolerance is not considered failure for the analysis. Therefore, a patient remains a treatment responder in this case if all other criteria are fulfilled. A rebound is defined by two consecutive measurements of VL ≥ 50 copies/ml, at least two weeks apart, after two consecutive measurements of VL, 50 copies/ml. ...
VR is defined as HIV viral load of , 50 copies/mL before month 36 and without subsequent rebound or change of ARV therapy. A rebound is defined by two consecutive measurements of VL ≥ 50 copies/ml, at least two weeks apart.. A change of ARV therapy is defined as a permanent discontinuation of Viramune®. A change in the background therapy due to toxicity or intolerance is not considered failure for the analysis. Therefore, a patient remains a treatment responder in this case if all other criteria are fulfilled. A rebound is defined by two consecutive measurements of VL ≥ 50 copies/ml, at least two weeks apart, after two consecutive measurements of VL, 50 copies/ml. ...
where rxx is reliability, Se2 is error variance in a group of scores, and Sx2 is variance in a group of observed scores. Reflection on the general meaning of the reliability formula reveals that a reliability coefficient (possible range 0 to 1.0) represents, in essence, the proportion of "true" score variance measured by a given instrument. Reliability coefficients approaching a value of 1.0 therefore indicate that nearly all variability in responses represents "true" or actual variability (no measurement error), while a reliability coefficient beneath 0.50 indicates that less than half of the variability in observed scores reflects "true" variability in the measured attribute (high measurement error). To underscore the importance of reliability, imagine that a clinician is interested in the relationship between number of therapy sessions attended and days abstinent in a 60-day period. The question is not trivial for the clinician because of growing pressures to simultaneously enlarge caseloads ...
W]hen [Rocco] Casagrande saw the government wanted someone to do an independent assessment of the benefits and risks [of some types of viral research], his company Gryphon Scientific applied for the job. … His teams report is over 1,000 pages long, and will be discussed Thursday and Friday at the National Institutes of Health, which is holding a meeting of a government advisory committee called the National Science Advisory Board for Biosecurity…" (Greenfieldboyce, 1/7).. ...
Agreement between two methods of clinical measurement can be quantified using the differences between observations made using the two methods on the same subjects. The 95% limits of agreement, estimated by mean difference +/- 1.96 standard deviation of the differences, provide an interval within which 95% of differences between measurements by the two methods are expected to lie. We describe how graphical methods can be used to investigate the assumptions of the method and we also give confidence intervals. We extend the basic approach to data where there is a relationship between difference and magnitude, both with a simple logarithmic transformation approach and a new, more general, regression approach. We discuss the importance of the repeatability of each method separately and compare an estimate of this to the limits of agreement. We extend the limits of agreement approach to data with repeated measurements, proposing new estimates for equal numbers of replicates by each method on each subject, for
Adhesion of leukocytes endothelial cells of arteries and their migration into the vessel wall is the critical event in initiation of atherosclerosis. This process is caused by the up regulation of adhesion molecules on endothelial cells and an increased expression of chemotactic factors to monocytes, in the vascular wall. Gene silencing by small interfering RNA (siRNA) has emerged as a useful technology for assessment of gene function and study of gene-gene interactions. The active agent, short interfering RNA (siRNA), are known to vary in silencing capacity depending on the position in the mRNA target. The validation of designed siRNA molecules as to their silencing efficiency is carried out in vitro cell based assay. In present study U937 cell line is used as a model as they are differentiating monocytes that express VCAM-11. The designing of perfect siRNA is a crucial step and involves the use of various bioinformatics tools. Presents study aimed at designing and in vitro validation of human ...
TY - JOUR. T1 - Precise quantification of pressure-flow waveforms during pulsatile and nonpulsatile perfusion. AU - Ji, Bingyang. AU - Undar, Akif. PY - 2007/5/1. Y1 - 2007/5/1. UR - http://www.scopus.com/inward/record.url?scp=34247496402&partnerID=8YFLogxK. UR - http://www.scopus.com/inward/citedby.url?scp=34247496402&partnerID=8YFLogxK. U2 - 10.1016/j.jtcvs.2006.10.076. DO - 10.1016/j.jtcvs.2006.10.076. M3 - Letter. C2 - 17467484. AN - SCOPUS:34247496402. VL - 133. JO - Journal of Thoracic and Cardiovascular Surgery. JF - Journal of Thoracic and Cardiovascular Surgery. SN - 0022-5223. IS - 5. ER - ...
Statistical Analysis for the Reliability Engineering Professional Effectively conduct reliability analysis using the worlds leading statistical software. Reliability Analysis with Minitab® outlines statistical concepts and applications,…
Read more about New non-invasive technique improves monitoring of foetal heartbeat on Business Standard. Researchers have developed a technique that can accurately separate foetal heartbeat from background noise in acoustic recordings, a finding that could potentially lead to cheap and non-invasive foetal monitoring while making pregnancy much safer.
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In correlation analysis, we estimate a sample correlation coefficient, more specifically the Pearson Product Moment correlation coefficient. The sample correlation coefficient, denoted r,. ranges between -1 and +1 and quantifies the direction and strength of the linear association between the two variables. The correlation between two variables can be positive (i.e., higher levels of one variable are associated with higher levels of the other) or negative (i.e., higher levels of one variable are associated with lower levels of the other).. The sign of the correlation coefficient indicates the direction of the association. The magnitude of the correlation coefficient indicates the strength of the association.. For example, a correlation of r = 0.9 suggests a strong, positive association between two variables, whereas a correlation of r = -0.2 suggest a weak, negative association. A correlation close to zero suggests no linear association between two continuous variables.. LISA: [I find this ...
RESULTS: The median FENO peak was 2.69 ppb, and the median FENO plateau was 1.57 ppb. The coefficients of repeatability between the 2 consecutive measurements for FENO peak and FENO plateau were 0.74 and 0.59, respectively. The intraclass coefficient between subjects within the cohort was 0.988 (95% CI 0.975-0.994, P , .001) for FENO peak and 0.991 (95% CI 0.982-0.996, P , .001) for FENO plateau. We found that the FENO peak was directly correlated with minute ventilation, but we did not find a direct relationship between the FENO peak concentration, exhaled NO output, or pulmonary NO excretion and respiratory severity score. ...
A recently conducted survey by Nature [1] asked over 1500 scientists in an online questionnaire about the state of reproducibility in research. Strikingly, the survey reveals that more than 70% of the researchers have attempted but failed to reproduce another scientists experiments, and more than half even admitted having failed to reproduce their own experiments. A mixed opinion generated from this survey identifies nearly 52% of the respondents who strongly confirm of a reproducibility crisis in research and around 38% who claim the existence of a moderate crisis. |br /> |br /> Lack of reproducibility in science is not a new debate but recent reports shed light on the ever-growing phenomenon, reasons being diverse. They range from complexity of experiments and statistics, lack of technical expertise required for reproduction, incomplete documentation, weak study design, variability of biological material, to succumbing to the ‘publish or perish’ culture. Most importantly, a lack of
A recently conducted survey by Nature [1] asked over 1500 scientists in an online questionnaire about the state of reproducibility in research. Strikingly, the survey reveals that more than 70% of the researchers have attempted but failed to reproduce another scientists experiments, and more than half even admitted having failed to reproduce their own experiments. A mixed opinion generated from this survey identifies nearly 52% of the respondents who strongly confirm of a reproducibility crisis in research and around 38% who claim the existence of a moderate crisis. |br /| |br /| Lack of reproducibility in science is not a new debate but recent reports shed light on the ever-growing phenomenon, reasons being diverse. They range from complexity of experiments and statistics, lack of technical expertise required for reproduction, incomplete documentation, weak study design, variability of biological material, to succumbing to the ‘publish or perish’ culture. Most importantly, a lack of
In this paper, two second-order methods are proposed for reliability analysis. First, general random variables are transformed to standard normal random variables. Then, the limit-state function is additively decomposed into one-dimensional functions, which are then expanded at the mean-value point to second-order terms. The approximated limit-state function becomes the sum of independent variables following noncentral chi-square distributions or normal distributions. The first method computes the probability of failure by the saddle-point approximation. If a saddle-point does not exist, the second method is then used. The second method approximates the limit-state function by a quadratic function with independent variables following normal distributions with the same variances. This treatment leads to a quadratic function that follows a noncentral chi-square distribution. These methods generally produce more accurate reliability approximations than the first-order reliability method (FORM) with ...
The ability to duplicate an experiment and its results is a central tenet of the scientific method, but recent research has shown an alarming number of peer-reviewed papers are irreproducible.. A team of math and statistics professors has proposed a way to address one root of that problem by teaching reproducibility to aspiring scientists, using software that makes the concept feel logical rather than cumbersome.. Researchers from Smith College, Duke University and Amherst College looked at how introductory statistics students responded to a curriculum modified to stress reproducibility. Their work is detailed in a paper published Feb. 25 in the journal Technological Innovations in Statistics Education.. In 2013, on the heels of several retraction scandals and studies showing reproducibility rates as low as 10 percent for peer-reviewed articles, the prominent scientific journal Nature dedicated a special issue to the concerns over irreproducibility.. Natures editors announced measures to ...
3 Objectives Describe principles behind validation procedures. Identify the procedures needed to gain confidence that the results are accurate and reproducible. Given specific laboratory, customize procedures.
Read more about our research project: Motor task manager reliability and validity study within Health Sciences at the University of Southampton
Background Positron emission tomography (PET) is a molecular imaging technology that enables in vivo quantification of metabolic activity or receptor density, among other applications. Examples of...
High-Precision Insulation, Low-Resistance and Voltage Measuring Instrument for up to 40 TΩ with 10 kV Test Voltage!. Applications and areas of application. The METRISO PRIME 10 insulation tester has been developed for the detection of insulation damage and for protection against electric shock in electrical power supply networks.. It measures resistance up to 40 TΩ with a test voltage of 10 kV in accordance with EN 61557-2.. Even in the case of high-frequency interference, absolutely precise measurement results are obtained.. Faults can be quickly and easily pinpointed by means of localization with the new "pulse control" function.. Insulation measurements such as PI, DAR, DD, stepped testing (SV), capacitance measurement, temperature measurement and measurement of protective conductor continuity are no problem.. These measurement results can be graphically represented at the display immediately.. Benefits for the customer. ...
A recent paper in Science reports the results of a large-scale effort to test reproducibility in psychological science. The results have caused much discussion (as well they should) in both general public and science forums. I thought I would offer my perspective as the lead author of one of the studies that was included in the reproducibility analysis. I had heard about the project even before being contacted to participate and one of the things that appealed to me about it was that they were trying to be unbiased in their selection of studies for replication: all papers published in three prominent journals in 2008. Jim Magnuson and I had published a paper in one of those journals (Journal of Experimental Psychology: Learning, Memory, & Cognition) in 2008 (Mirman & Magnuson, 2008), so I figured I would hear from them sooner or later. ...
ECG (electrocardiogram) tests, which are commonly given to people with suspected angina to predict the likelihood future of heart disease, have limited accuracy.
Examine relevant correlational statistics, including indicators of size (e.g., Phi, Cramers ν, Point biserial, Spearmans Rho or Kendalls Tau, or product-moment correlation (r)) and statistical significance of the ...
Editors Note: Article by SC18 Student Cluster Competition Reproducibility Chair Christopher Bross who is a researcher and PhD student at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU). Brief Introduction Replication and reproducibility of experimental computer science results is essential for peer reviewed, high-quality papers. Over the past years, aspects of replication and reproducibility have become more relevant in the HPC community. … ...
AOAC Seeking Validation Methods for MSM Under contract with the National Institutes of Health (NIH) and FDA, AOAC International, Gaithersburg, MD, has embarked on an effort to develop a group of fully validated analytical methods for select di
Validation Methods | Scientific research info incl meetings, conferences, seminars, symposia,tradeshows,jobs,jobfairs, professional tips and more.
AR System Message Catalog ARERR [8817] The value of the external reference has an invalid format. This is likely caused by a programming error, for example, in an incorrect API program. |= Go back
AR System Message Catalog ARERR [8817] The value of the external reference has an invalid format. This is likely caused by a programming error, for example, in an incorrect API program. |= Go back
PUR foam exhibits an insignificant level of anisotropic behavior which is shown by the dilatometer measurement. The CTE values are nearly the same in the y- and z-directions between -160°C and 100°C. An additional measurement was performed in each direction; the results also demonstrate the excellent reproducibility of the dilatometer DIL 402 C. ...
Preventing infections from surgery is a major concern for hospitals and it turns out some simple measures can make a big difference.
In this study, we demonstrated that two commonly used paradigms to study language processing demonstrate good reproducibility over four test-retest sessions. However, the demonstration of reproducibility alone is insufficient to evaluate the utility of a paradigm for clinical use. For preoperative mapping, the ability to localize function is important. Paradigms that demonstrate large distributed areas of activation or areas of extraneous activation are not of much utility in preoperative localization. In this study, we called areas outside the dominant left temporal and left frontal lobes areas of extraneous activation. In fact, these areas may be relevant to language function; however, in keeping with the current models of language function (19) and the lack of electrical stimulation data on these extraneous sites, the assumption that they are not necessary for language function is likely justified. Although findings from previous fMRI studies (20-23) suggest bilateral representation of ...
Find information for part TPSMD17A from the TPSMD Series Automotive and High Reliability TVS, or search for TVS Diodes and more from Littelfuse.
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Visual fields measured with standard automated perimetry are a benchmark test for determining retinal function in ocular pathologies such as glaucoma. Their monitoring over time is crucial in detecting change in disease course and, therefore, in prompting clinical intervention and defining endpoints in clinical trials of new therapies. However, conventional change detection methods do not take into account non-stationary measurement variability or spatial correlation present in these measures. An inferential statistical model, denoted Analysis with Non-Stationary Weibull Error Regression and Spatial enhancement (ANSWERS), was proposed. In contrast to commonly used ordinary linear regression models, which assume normally distributed errors, ANSWERS incorporates non-stationary variability modelled as a mixture of Weibull distributions. Spatial correlation of measurements was also included into the model using a Bayesian framework. It was evaluated using a large dataset of visual field ...
It is difficult to make a reliable measurement of running clearance in the hostile environment over the blading of a modern gas turbine. When engine manufacturers require the measurement to be made over every blade during live engine tests, system reliability, ruggedness, and ease of operation are of primary importance. This paper describes a tip clearance measurement system that can measure clearance over every blade around a rotor. The measurement system concept is presented, and the system design described in detail. Commissioning of the measurement system on a compressor test facility, and the results obtained are discussed. An analysis of system performance during the commissioning trials concludes the paper.. ...
Disentangling the External Reference Frames Relevant to Tactile Localization. . Biblioteca virtual para leer y descargar libros, documentos, trabajos y tesis universitarias en PDF. Material universiario, documentación y tareas realizadas por universitarios en nuestra biblioteca. Para descargar gratis y para leer online.
Join Jim LaPier for an in-depth discussion in this video Binding external references, part of AutoCAD for Mac 2019 Essential Training
Other novelties include DynaCage; Saab-speak for two spring-loaded rollover hoops that are recessed behind the saab 9 3 reliability on which has the saab 9 3 reliability are best appreciated out on the saab 9 3 reliability against wind noise. If theres a whistling or drumming at speed, the saab 9 3 reliability an uprated 280bhp 2.8 V6 turbo petrol unit that will appeal to skiers though is that the Saab offers some serious attitude.. Heres a car able to afford the saab 9 3 reliability and construction of components like the saab 9 3 reliability to prevent water droplets dripping onto the saab 9 3 reliability a 180bhp twin-turbocharged diesel powerplant and a front end thats more aggressive than a mere windowdressing, however, and today the saab 9 3 reliability of forced induction has changed markedly. Turbocharged engines are lifted from the saab 9 3 reliability is classily appointed with a twin-stage turbo to deliver all that power. If thats too much, there are a good deal of interior space. ...
JEE is a bad exam in many ways -- this post from six years ago for some of the details. The most important badness is in its insistence on ranking students -- an exercise with little or no statistical basis that produces noisy results with poor reproducibility. Unfortunately, the new mechanism proposed by the government does not allow us to move away from the statistically bankrupt idea of ranking students. Even if the two proposed national exams (JEE-Main and JEE-Advanced) are standardized, can their percentile scores be expressed with a precision of one in a million? And, the proposed mechanism is rigid in fixing the relative weights for the three components, and using this rigid formula for ranking students. From this point on, theres no difference at all between the new mechanism and AIEEE (or JEE). We can do better. * * *. Heres one possibility: Lets say there are N exams in all -- and students get a percentile score in each of them. Now, let the individual institutions choose their ...
With missing data, all analyses and corresponding inferences rest on inherently untestable assumptions about the missingness mechanism. Therefore, sensitivity analyses, where we explore the robustness of inferences as assumptions change, are important.. The method presented here enables rapid local sensitivity analysis to inferences obtained via MI under MAR. It works by upweighting imputations which are more plausible under MNAR; under a logistic model for the missingness mechanism, these weights take a particularly simple form.. While the sensitivity analysis is local, it nevertheless provides important information on the duration and impact of departures from MAR on inference, while avoiding the computational complexity of full joint modeling. Its accuracy for local sensitivity analysis has been confirmed elsewhere[20, 30].. Here, we have developed and illustrated the practical utility of the approach, proposing a 4-step process for choosing a value for the sensitivity parameter. We now ...
Aricle by Paul Jump, September 3 2015 https://www.timeshighereducation.co.uk/features/reproducing-results-how-big-is-the-problem
Accelerating adoption of CSP and flip-chip area array packaging for high performance and hand-held applications is the main driving force for high-density
This video explains why striping, reprobing and cutting of Western blots is wasteful and unreliable as it results in uneven removal of proteins, erroneous cutting and poor reproducibility. The video goes onto describe how stain-free technology from Bio-Rad allows for total protein normalization and prevents the need for striping, reprobing and cutting.
Methods Eighteen healthy adults underwent EPCs count on three different time points: two in the same day between 7:00 and 8:30 and between 12:30 and 14:00; and one in another day between 7:00 and 8:30. EPCs (CD34+CD45lo; CD34+CD45loCD133+; and CD34+CD45loCD31+) were quantified using multi-parameter flow cytometry and an ISHAGE based gating strategy. Variability of EPCs was assessed by coefficient of variation (CV) between time points in the same day and in different days. ...
A method for measuring the presence or concentration of an analyte in a sample by spectrophotometry: providing an open top cuvette having a sample with an analyte to be measured; providing a light sou
... is the process of deciding whether the numerical results quantifying hypothesized relationships between variables, obtained from regression analysis, are in fact acceptable as descriptions of the data. The validation process can involve analysing the goodness of fit of the regression residuals is random, and checking whether the models predictive performance deteriorates substantially when applied to data that were not used in model estimation.. A high R2 does not guarantee that the model fits the data well. This is because Anscombes quartet shows a high R2 can occur in the presence of misspecification of the functional form of a relationship or in the presence of outliers that distort the true relationship. The problem with the R2 as a measure of model validity is that is can always be increased by adding more variables into the model, except in the unlikely event that the additional variables are exactly uncorrelated with the dependent variable in the data sample ...
People can put on 20 pounds in 20 years, but who looks at losing that weight over 20 years? If you think about making minor changes to your lifestyle and think long-term about taking off the weight, youre more likely to be successful," he says. "Dont be fooled by what you see in two to three weeks-take a year or two to lose significant weight." ...
This thesis consists of 2 separate ultrasound (US) based studies, performed with the common aim of improving the diagnosis of early vascular disease from US images. Study 1 Introduction: Flow mediated dilatation (FMD) is an endothelium-dependent process reflecting the dilatation of a conduit artery when it is exposed to increased blood flow and therefore increased shear stress. FMD requires a healthy endothelium and is depressed in those with cardiovascular risk factors. Current 2D US assessment is limited as a research tool only secondary to variable reproducibility, technical difficulties and difficulties determining true diameter measurement. To our knowledge this is the first study comparing 2D and 3D US assessment of FMD. Methods: This was a cross sectional reproducibility study with 27 male patients. 2D and 3D FMD were performed on both study visits. Nitrate induced dilatation (NID) was performed as a control. We hypothesised that 3D US would eliminate the systematic underestimation of diameter
Reliability relates to the precision, stability or reproducibility of an assessment tools results. In basic mathematical terms, reliability is estimated as:. Rx = VT/Vx Where: Rx is the reliability in the observed (test) score, X; Vt and Vx are the variability in true (i.e., candidates innate performance) and measured test scores respectively. Simply stated, reliability is a term that covers the dependability of an assessment and measures the extent to which a test will yield the same result after multiple administrations under the same conditions.10 Reliability is recorded as a coefficient on a scale from 0 to 1. A test with a reliability coefficient of 0 is completely unreliable. That is, the variability in test results are independent of candidate ability. A test with a coefficient of 1 indicates complete reliability and is rarely achieved. There is general agreement that if important decisions are going to based on the results of a test, a reliability of  0.8 is required. 5 In general, ...
There are four steps to tracking changes: 1. Tell Word to track changes. 2. Tell Word to display Tracked Changes. 3. Tell Word how to display Tracked Changes. 4. Tell Word to accept or reject the changes This page explains how.
BioreclamationIVT, Authorized Distributor For: BioreclamationIVT expands its offering of cellular products directed at oncology research through its partnership with Cellaria to offer their novel cancer cell lines and cancer culture media. Designed to accelerate cancer research, the Cellaria cell models are derived directly from patient tumors with fully consented, fully documented pathological data. A unique feature of the cell models is their ability to maintain the fidelity of primary cells, with no genetic manipulation, while still offering the long-term reproducibility and scalability seen with traditional tumor cell lines. In addition to the cell lines, BioreclamationIVT will also distribute Cellarias proprietary media which is specifically formulated to extend in vitro propagation of primary tumor and epithelial cells. Where established testing methods fall short, Cellaria fills the gap.
Reproducibility of reported height and weight were studied via repeated questionnaire surveys distributed to subjects within a year. Effects of the factors which might influence the reproducibility of these values were investigated. Although only about half of the subjects reported the same height and 30% the same weight on the second...
Fluke offers a range of meters, starting in the sub-$150 range and working upwards from there. So why opt for the 87V, which is priced at ~$350 for the base model and ~$430 for the special combo kits?. More features/measurement modes, greater accuracy, lifetime warranty.. Lets say you have a 20.00V signal that you want to measure. The 87V has an accuracy of ±(0.05% + 1), which is interpreted as ± 0.05% of the signal plus or minus 1 digit/count to the least significant digit. The first part of the error means that the measurement would be between 19.99V and 20.01V. Taking the second error component into account, this means the allowable measurement range would be between 19.98V and 20.02V.. A good - but less expensive - meter might have an accuracy of ±(0.5% + 2), which would mean a measurement range of 19.88V to 20.12V (±0.1V and 2 digits/counts).. Just like some users need different features than others, there are those that need greater accuracy.. The Fluke 87V is the best handheld ...