Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 30 for “"false positive results"”.
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Detection of Giardia lamblia and Cryptosporidium parvum in the eastern oyster (Crassostrea virginica) harvested from the Great Bay Estuary
… reactivity with algae and the production of false positive results limits the usefulness of this technique in environmental studies. Molecular approaches, such as the polymerase chain reaction, are often overlooked in environmental studies. This is due to obstacles such as enzymatic …
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Development and evaluation of a colorimetric coliphage assay detection system
… 2) the LCPA and CAB methods were not subject to false positive results, 3) the LCPA method theoretically detected fewer coliphage particles than the APHA method, and 4) the CAB method detected roughly twice the number of coliphage particles than the APHA method. During the field evaluation, the …
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The Epidemiology and Health System Impact of Medium-Chain Acyl-CoA Dehydrogenase Deficiency Among Affected Children and Those with False Positive Newborn Screening Results in Ontario, Canada
… among infants diagnosed with MCADD or received a false positive newborn screening result for MCADD from April 2006 through March 2010. Each cohort was compared with screen negative infants by linking to databases encompassing physician visits, emergency department care, and hospitalizations. …
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A comparative analysis of accuracy and sensitivity in semen presumptive testing: ABAcard P30™, RSID Semen™, and Seratec PSA™
… However, presumptive tests can produce false positive results, as these biomarkers may also be present in other bodily fluids. Despite this limitation, some agencies still rely on presumptive test outcomes as a confirmation test for semen in legal proceedings. This study evaluated and …
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Identifying predictors of evolutionary dispersion with phylogeographic generalised linear models
… the lack of a term modelling stochastic noise results in high false positive rates for predictors of spatial diffusion. We further show that the false positive rate can be controlled by including a random effect term, thus allowing unobserved sources of rate variation. Finally, we apply this …
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Masquerade detection using fortified naive Bayes
… problems including low detection rates and high false positive results. Roy Maxion and Kevin Killourhy utilized a Naive Bayes classifier for detection using enriched Unix command lines, which are command line entries that still contain flags and other data. They discovered a problem with users …
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A study to investigate the persistence of polydimethylsiloxane and to determine the detection of polydimethylsiloxane in a body fluid matrix following Cellmark’s Sperm Elution©
… sexual assaults has risen also. Accounts of false positive results arising from lubricant analysis in alleged sexual assault cases are becoming progressively common. This led to suggestions that PDMS may be unintentionally transferred onto blank cotton swabs during manufacturing. This project …
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Production of Chemicals from Air Through Electrocatalytic Nitrogen and Oxygen reduction
… of those nitrogen oxyanions (NOx –) causes false positive results for NRR. To avoid these false positive results and to make the best practice of NRR research, simple but versatile spectrophotometric methods were employed to quantitatively determine NOx – contaminations, followed by …
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The prediction of antenatal and postnatal depression in a sample of Western Australian women
… depressive symptoms (EPDS 2: 9); (c) depression false positive results (EPDS 2:9, but no MINI diagnosis of major depression); and (d) depression level (EPDS total score) in the antenatal and early postnatal period. The study was prospective in design, with 200 women enrolled from Western …
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Monitoring pesticides in the soil, groundwater, and submarine groundwater discharge of the Chesapeake Bay Area
… lower limits of detection, but may yield some false positive results.
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Serologische Untersuchungen von Sauenmilch und Ferkelblut als mögliche Alternative zur Blutuntersuchung von Muttersauen im Rahmen der Bestandsdiagnostik
… used for serological milk testing. The results of the sows' blood testing served as the basis for the evaluation of the colostrum, milk and piglets' blood samples. Sensitivity, specifity, positive and negative predictive factor were determined. Further more the development of the milk …
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1. Reinvestigation of a catalytic, enantioselective alkene dibromination and chlorohydroxylation, 2. Double cross-coupling reactions of siloxaborolates, 3. The enantioselective synthesis of 3-substituted morpholines using computer-guided catalyst design
… to be incorrect. Possible explanations for the false positive results are discussed. Chapter 2 moves to a completely different area of chemistry, in the Nobel Prizewinning field of cross-coupling. A bench-stable, crystalline siloxaborolate is described, capable of double cross-coupling reactions …
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Common Pool Goods and New Technology Adoption: How Canada Can Implement New Vaccinology Strategies Related to Johne’s Disease
… Current vaccines and tests for JD result in false positive results for tuberculosis (TB), caused by the pathogens Mycobacterium tuberculosis (M. tb, the human variant) and Mycobacterium bovis (M. bovis, the bovine variant). When positive TB results are triggered, either due to the presence of …
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Development of confirmatory testing strategies for suspect false PRRS-positive reactors in diagnostic serology
… challenged by the occurrence of unexpected false positive results at varying rates. An indirect fluorescent antibody (IFA) test has been commonly employed to confirm or disprove the suspect false positive reactivity in the ELISA. However, the reliability of test results have been often …
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Detection of safety signals in randomised controlled trials
… hypothesis tests may lead to large numbers of false positive results, but simple adjustments are generally too conservative. In addition, the anticipated effect sizes of adverse events in clinical trials are generally small and consequently the power to detect such effects is low.;A number of …
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Conformational analysis of antibody binding site using EDMA methods /
… validations of the EDMA methods using both positive control and negative control tests for the conformational samples of isolated LI loop and LI in three-loop assembly must be done. The EDMA-I bootstrap null hypothesis tests showed false positive results for the comparison of six samples of …
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Magnetresonanztomographie mit einer 3D-T2-gewichteten Turbo-Spin-Echo-Sequenz unterschiedlicher Auflösung : Darstellung anatomischer Details und pathologischer Veränderungen in axialen Aufnahmen, Maximum-Intensitäts-Projektionen und dreidimensionalen Volumenrekonstruktionen
… the very high-resolution sequence lead to less false-positive results than all other procedures when judging the pathological findings of the membranous labyrinth. Looking to the postprocessing procedures, the MIP is inferior to the 3D reconstruction due to its strongly limited detail resolution …
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Untersuchung der fetalen Herzfrequenz mit Methoden der Komplexitätsanalyse
… value; in particular the incidence of false - positive results of CTG evaluations has been found to be inacceptably high. New methods of evaluating fetal heart rate tracings are being sought which should reduce unnecessary Cesarean sections by better recognizing the fetuses truly at …
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Practical and Secure Searchable Symmetric Encryption Constructions
… or have severe limitations, such as bringing false positive results, suffering from high round complexity, or failing to support dynamic databases. To address these issues, the thesis proposes new cryptographic primitives in its third and fourth contributions. The third contribution designs a …
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Investigating the Molecular Mechanisms of TMEM16F – a Ca2+ Activated Phospholipid Scramblase and Ion Channel
… using fluorescence-based assay that could cause false positive results and challenge the identification of bona fide inhibitors for the CaPLSases (Chapter 4). Finally, our discovery of Subdued – a TMEM16 fly homolog – as a new moonlighting protein with similar biophysical properties to those of …
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