scholarly journals Toothbrush as a sampling methodology for detection of SARS‐ CoV‐2

Oral Diseases ◽  
2021 ◽  
Author(s):  
Shipra Gupta ◽  
Ritin Mohindra ◽  
Akanksha Jain ◽  
Mohita Singla ◽  
Timo Sorsa ◽  
...  
Keyword(s):  
Sampling Methodology

Incremental Sampling Methodology for improved characterization of Agent Orange dioxin in Vietnam soil and sediment

2021 ◽  
Vol 299 ◽  
pp. 113599
Author(s):  
Alexis López ◽  
Kent Sorenson ◽  
Jeffrey Bamer ◽  
Randa Chichakli ◽  
Thomas Boivin ◽  
...  
Keyword(s):  
Agent Orange ◽  
Sampling Methodology ◽  
Incremental Sampling ◽  
Soil And Sediment

scholarly journals The European Sero-Epidemiology Network: standardizing the enzyme immunoassay results for measles, mumps and rubella

2000 ◽  
Vol 125 (1) ◽  
pp. 127-143 ◽  
Author(s):  
N. ANDREWS ◽  
R. G. PEBODY ◽  
G. BERBERS ◽  
C. BLONDEAU ◽  
P. CROVARI ◽  
...  
Keyword(s):  
Enzyme Immunoassay ◽  
European Countries ◽  
Reference Laboratory ◽  
Sampling Methodology ◽  
Local Standard ◽  
Quantitative Results ◽  
Network Project ◽  
Reference Country

The ESEN (European Sero-Epidemiology Network) project was established to harmonize the seroepidemiology of five vaccine preventable infections including measles, mumps and rubella in eight European countries. This involved achieving comparability both in the assay results from testing in different centres and also sampling methodology. Standardization of enzyme immunoassay results was achieved through the development of common panels of sera by designated reference centres. The panels were tested at the reference laboratory and then distributed to each participating laboratory for testing using their routine methods. Standardization equations were calculated by regressing the quantitative results against those of the reference laboratory. Our study found large differences in unitage between participants, despite all using an EIA method standardized against an international or local standard. Moreover, our methodology adjusted for this difference. These standardization equations will be used to convert the results of main serosurvey testing into the reference country unitage to ensure inter-country comparability.

scholarly journals New classification of natural breeding habitats for Neotropical anophelines in the Yanomami Indian Reserve, Amazon Region, Brazil and a new larval sampling methodology

2015 ◽  
Vol 110 (6) ◽  
pp. 760-770 ◽  
Author(s):  
Jordi Sánchez-Ribas ◽  
Joseli Oliveira-Ferreira ◽  
Maria Goreti Rosa-Freitas ◽  
Lluís Trilla ◽  
Teresa Fernandes Silva-do-Nascimento
Keyword(s):  
Amazon Region ◽  
New Classification ◽  
Sampling Methodology ◽  
Breeding Habitats ◽  
Indian Reserve ◽  
Natural Breeding

Seed banking in ancient forest species: why total sampled area really matters

2012 ◽  
Vol 22 (2) ◽  
pp. 123-133 ◽  
Author(s):  
Jan Plue ◽  
Ken Thompson ◽  
Kris Verheyen ◽  
Martin Hermy
Keyword(s):  
Species Richness ◽  
Seed Bank ◽  
Deciduous Forests ◽  
Forest Species ◽  
Sampling Methodology ◽  
Total Species Richness ◽  
Ancient Forest Species ◽  
Ancient Forest ◽  
Temperate Deciduous ◽  
Temperate Deciduous Forests

AbstractThis study investigates how methodological aspects of seed-bank sampling affect seed-bank records in temperate deciduous forests. We focused explicitly on seed-bank records of ancient forest species, which are assumed to lack a persistent seed bank; a hypothesis suspected to be partly due to methodological shortcomings. Through a quantitative review of 31 seed-bank studies in temperate deciduous forests of central and north-west Europe, we quantified the role of sampling methodology in constraining total seed-bank records and seed-bank records of ancient forest species (γ-diversity, average species' retrieval frequency and average seed density). A major methodological trade-off was established between sampled plot area and the number of plots: at an increased number of plots, the area sampled per plot decreased significantly. The total surface area sampled in a study was the primary determinant of γ-diversity, both for overall species richness and for ancient forest species richness. A high retrieval frequency of ancient forest species indicated that few plots were intensively sampled. The parallel increase in total species richness and ancient forest species richness and the non-significance of their ratio in relation to methodological variables suggests that ancient forest species are not particularly rare in the seed bank compared to other species. These results imply that sampling methodology has a far-reaching impact on seed-bank records such as γ-diversity, the detection of ancient forest species and ultimately seed-bank composition. We formulate a set of guidelines to improve the quality of seed-bank studies in temperate deciduous forests.

scholarly journals A metodologia de amostragem do Saeb

2019 ◽  
Vol 81 (197) ◽  
Author(s):  
Marcus M. Riether ◽  
Raíssa Rauter
Keyword(s):  
International Research ◽  
Target Population ◽  
Random Numbers ◽  
Sampling Methodology ◽  
Complex Samples ◽  
Poisson Sampling ◽  
Sampling Schemes ◽  
Data Analyses ◽  
Research Institutes

Apresenta, sob um enfoque simplificado, a metodologia de amostragem do Saeb, enfatizando particularidades relacionadas com o ciclo de 2001 e buscando esclarecer o leitor em relação a alguns dos pontos considerados mais importantes, tais como população de referência, estágios, esquemas de seleção de unidades amostrais e métodos de análise de dados de amostras complexas. Tópicos como precisão amostral, que envolvem discussões corriqueiras sobre a não-publicação de resultados individuais por escola ou a repetição de escolas que participaram do Saeb 1999, também são discutidos. Citam-se, ainda, casos de institutos de pesquisa sediados em outros países e que utilizam metodologias de amostragem semelhantes a do Saeb. Por fim, são apresentadas sugestões para o Saeb em suas futuras realizações. Palavras-chave: amostras complexas; coordenação de amostras; amostragem seqüencial de Poisson; números aleatórios permanentes. Abstract This paper presents a simplified version of the Saeb sampling methodology, emphasizing particularities of its cycle of 2001, and aiming at making clear to the reader some of its main points, such as target population, stages, sampling schemes and data analyses methods applied to complex samples. Topics like precision of estimates, that involve customary discussions about the avoidance in publishing schools' individual results or the sample overlap with the Saeb 1999 are also discussed. Cases of international research institutes that make use of sampling methodologies similar to that of Saeb are also mentioned. To finish, we present suggestions to Saeb in its future realizations. Keywords: complex samples; sample overlap; sequential Poisson sampling; permanent random numbers.

scholarly journals Ecological and convergent validity of experimentally and dynamically assessed social capacity using the Perceptual Crossing Experiment in adolescence

2021 ◽  
Author(s):  
Karlijn Susanna Francisca Maria Hermans ◽  
Olivia J Kirtley ◽  
Zuzana Kasanova ◽  
Robin Achterhof ◽  
Noëmi Hagemann ◽  
...  
Keyword(s):  
Social Skills ◽  
Social Interaction ◽  
Convergent Validity ◽  
Social Dynamics ◽  
Daily Life ◽  
Ecological Validity ◽  
Sampling Methodology ◽  
Crossing Experiment ◽  
Initial Results

The Perceptual Crossing Experiment (PCE) captures social capacity using real-time social interaction dynamics but has not been externally validated. We tested ecological and convergent validity of the PCE, in a sample of 208 adolescents from the general population, aged 11 to 19. We expected associations between PCE social capacity and 1) quantity and quality of social interaction in daily life, using Experience Sampling Methodology (ESM) (ecological validity), and 2) self-reported social skills using a questionnaire (convergent validity). We also expected PCE social capacity to better explain variance in ESM social measures than self-reported social skills. Multilevel analyses showed that only self-reported social skills were significantly positively associated with social experience of company in daily life. These initial results do not support the ecological and convergent validity of the PCE. However, fueled by novel insights regarding the complexity of capturing social dynamics, we identified promising methodological advances for future validation efforts.

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