Results 31 to 40 of about 50,799,135 (318)
Optimising sampling and analysis protocols in environmental DNA studies
Scientific Reports, 2021 Ecological surveys risk incurring false negative and false positive detections of the target species. With indirect survey methods, such as environmental DNA, such error can occur at two stages: sample collection and laboratory analysis.
Andrew Buxton +4 more
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Sampling Methods in Clinical Research; an Educational Review
Emergency, 2016 Clinical research usually involves patients with a certain disease or a condition. The generalizability of clinical research findings is based on multiple factors related to the internal and external validity of the research methods.
Mohamed Elfil, Ahmed Negida
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Crude incidence in two-phase designs in the presence of competing risks. [PDF]
, 2016 BackgroundIn many studies, some information might not be available for the whole cohort, some covariates, or even the outcome, might be ascertained in selected subsamples. These studies are part of a broad category termed two-phase studies.
A Demnati +45 more
core +3 more sources
Minimally invasive blood sampling method for genetic studies on Gopherus tortoises [PDF]
Animal Biodiversity and Conservation, 2015 Método de extracción de sangre mínimamente invasivo para estudios genéticos en tortugas terrestres del género Gopherus La obtención de muestras de tejido de buena calidad es la primera dificultad en cualquier estudio molecular.
L. M. García–Feria +2 more
doaj +4 more sources
Implementation of web-based respondent driven sampling in epidemiological studies
BMC Medical Research Methodology, 2023 Background Respondent-driven sampling (RDS) is a peer chain-recruitment method for populations without a sampling frame or that are hard-to-reach. Although RDS is usually done face-to-face, the online version (WebRDS) has drawn a lot of attention as it ...
Pedro Ferrer-Rosende +5 more
doaj +1 more source
, 2014 Quantifying and assessing changes in biological diversity are central aspects of many ecological studies, yet accurate methods of estimating biological diversity from sampling data have been elusive.
A. Chao +6 more
semanticscholar +1 more source
Sensors, 2019 The deployment of small unmanned aircraft systems (UAS) to collect routine in situ vertical profiles of the thermodynamic and kinematic state of the atmosphere in conjunction with other weather observations could significantly improve weather forecasting
Phillip B. Chilson +19 more
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A Categorization of Behaviors Reported in Experience Sampling Studies
Social Psychological Bulletin, 2020 Experience sampling is considered one of the best methods for measuring behavior (Furr, 2009, https://doi.org/10.1002/per.724). When used for this purpose, it requires a coding system to transform diversified reports on what people are doing, provided as
Ewa Skimina +7 more
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Sample size: how many participants do I need in my research? [PDF]
Anais Brasileiros de Dermatologia, 2014 The importance of estimating sample sizes is rarely understood by researchers, when planning a study. This paper aims to highlight the centrality of sample size estimations in health research.
Jeovany Martínez-Mesa +4 more
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Poor implementation of non-invasive sampling in wildlife genetics studies [PDF]
Rethinking Ecology, 2019 The Earth’s biodiversity is currently experiencing immense pressure from habitat loss, overexploitation, global climate change, and invasive species, which escalate the global extinction crisis.
Miriam A. Zemanova
doaj +3 more sources