Revista Brasileira de Ginecologia e Obstetrícia, 2021 Objective The coronavirus disease 2019 (COVID-19) is a pandemic viral disease, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
Guilherme de Moraes Nobrega +5 more
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Sampling system for estimating woody debris in an urban mixed tropical forest
Anais da Academia Brasileira de Ciências, 2018 Woody debris, defined as standing and downed deadwood, consists in an essential component of the forest carbon stock. However, few studies have been carried out to get an efficient and accurate sampling procedure for estimating it. This work proposes two
SYLVIO PÉLLICO NETTO +4 more
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The VIMOS Public Extragalactic Redshift Survey (VIPERS). Never mind the gaps: comparing techniques to restore homogeneous sky coverage [PDF]
, 2014 [Abridged] Non-uniform sampling and gaps in sky coverage are common in galaxy redshift surveys, but these effects can degrade galaxy counts-in-cells and density estimates.
Adami, C. +30 more
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Obtaining self-samples to diagnose curable sexually transmitted infections: a systematic review of patients' experiences [PDF]
, 2015 BACKGROUND: Routine screening is key to sexually transmitted infection (STI) prevention and control. Previous studies suggest that clinic-based screening programmes capture only a small proportion of people with STIs.
Lau, Jason +4 more
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Assessment of Sample Size Calculations Used in Aquaculture by Simulation Techniques
Frontiers in Veterinary Science, 2020 An adequate sampling methodology is the key to knowing the health status of aquatic populations. Usually, the aims of epidemiological surveys in aquaculture are to detect an infection and estimate the disease prevalence, and different formulas are used ...
Ignacio de Blas +3 more
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Systematic errors in Gaussian Quantum Monte Carlo and a systematic study of the symmetry projection method [PDF]
, 2008 Gaussian Quantum Monte Carlo (GQMC) is a stochastic phase space method for fermions with positive weights. In the example of the Hubbard model close to half filling it fails to reproduce all the symmetries of the ground state leading to systematic errors
Assaad, F. F. +5 more
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CAVEAT ON THE ERROR ANALYSIS FOR STEREOLOGICAL ESTIMATES
Image Analysis and Stereology, 2011 It is frequently asked that how big a sample size, or how much measurement, is needed to achieve an accuratestereological estimate. The observed total error of a stereological estimate arises from individual difference (i.e.
Zhengwei Yang +3 more
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Variance of the Isotropic Uniform Systematic Sampling
Image Analysis and Stereology, 2019 The integral of a smooth function with bounded support over a set with finite perimeter in Euclidean space ℝd is estimated using a periodic grid in an isotropic uniform random position.
Jiri Janacek, Daniel Jirak
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Continuous measurement of nitrate concentration in a highly event-responsive agricultural catchment in south-west of France: is the gain of information useful? [PDF]
, 2012 A nitrate sensor has been set up to measure every 10 min the nitrate signal in a stream draining a small agricultural catchment dominated by fertilized crops during a 2-year study period (2006–2008) in the south-west of France.
Dugast, Philippe +7 more
core +4 more sources
Sampling dependent systematic errors in effective harmonic models
, 2019 Effective harmonic methods allow for calculating temperature dependent phonon frequencies by incorporating the anharmonic contributions into an effective harmonic Hamiltonian.
Klintenberg, Mattias, Metsanurk, Erki
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