Results 11 to 20 of about 7,075,558 (291)
Mixed Effects in Stochastic Differential Equation Models
Revstat Statistical Journal, 2005 A class of statistical models is proposed where random effects are incorporated into a stochastic differential equations model, and an expression for the likelihood function is derived.
Susanne Ditlevsen , Andrea De Gaetano
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Population and antenatal-based HIV prevalence estimates in a high contracepting female population in rural South Africa. [PDF]
, 2007 BACKGROUND: To present and compare population-based and antenatal-care (ANC) sentinel surveillance HIV prevalence estimates among women in a rural South African population where both provision of ANC services and family planning is prevalent and ...
Welz, Tanya +18 more
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Using Twitter data for demographic research
Demographic Research, 2017 Background: Social media data is a promising source of social science data. However, deriving the demographic characteristics of users and dealing with the nonrandom, nonrepresentative populations from which they are drawn represent challenges for social
Dilek Yildiz +4 more
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Diversity, 2021 Modelling the distribution and abundance of species at risk is extremely important for their conservation and management. We used ecological niche models (ENMs) to predict the occurrence of western rattlesnakes (Crotalus oreganus) in British Columbia (BC)
David Anthony Kirk +5 more
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Estimating Overwintering Monarch Butterfly Populations Using Terrestrial LiDAR Scanning
Frontiers in Ecology and Evolution, 2019 Concerns about the state of decline of the North American monarch butterfly (Danaus plexippus) have prompted their consideration for listing under the Endangered Species Act. Data suggest a substantial decline (> 80%) in overwintering numbers for both
Nickolay I. Hristov +6 more
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Testing unmanned aircraft systems for salmon spawning surveys
FACETS, 2016 Unmanned aircraft systems (UASs) were tested for counting Chinook salmon (Oncorhynchus tshawytscha) redds as a more accurate, safer alternative to manned helicopter flights. Counting redds from the helicopter was less expensive and time consuming, but of
Phillip A. Groves +4 more
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Estimating prevalence of early symptomatic Alzheimer's disease in the United States
Alzheimer’s & Dementia: Diagnosis, Assessment & Disease Monitoring, 2023 INTRODUCTION Understanding the prevalence of treatment‐eligible Alzheimer's disease (AD) is crucial for policy planning. METHODS We used a comprehensive literature review and population cascade approach to estimate the number of amyloid‐positive ...
Drew Spargo +5 more
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Estimating the cohabiting population [PDF]
Population Trends, 2009 This article summarises mid-2007 cohabitation estimates produced for England and Wales and compares these with estimates made for previous years. Over the last fifteen years there has been a rise in the number of cohabiting adults in England and Wales. Previous estimates indicate that there were 2.7 million cohabiting adults in 1992 (6 per cent of the ...
openaire +2 more sources
Unbiased Estimates for Products of Moments and Cumulants for Finite Populations
Mathematics, 2023 Let FN be the distribution function of a finite real population of size N. Let Fn be the empirical distribution function of a sample of size n drawn from the population without replacement.
Christopher S. Withers +1 more
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