نتایج جستجو برای: environmental conditions covariates

تعداد نتایج: 1173840  

2005
Devin S. Johnson Jennifer A. Hoeting LeRoy Poff

We develop a model to relate a multivariate compositional response to a number of covariates. We propose a new graphical model, called the Random Effects Discrete Regression (REDR) model, which allows for examination of the complex conditional relationships between a set of covariates and multiple discrete response variables. Our approach offers a number of advantages over previous approaches a...

Journal: :Anesthesiology 2012
Martin S Angst Laura C Lazzeroni Nicholas G Phillips David R Drover Martha Tingle Amrita Ray Gary E Swan J David Clark

BACKGROUND The clinical utility of opioids is limited by adverse drug effects including respiratory depression, sedation, nausea, and pruritus. In addition, abuse of prescription opioids is problematic. Gaining a better understanding of the genetic and environmental mechanisms contributing to an individual's susceptibility to adverse opioid effects is essential to identify patients at risk. M...

2010
David A. Swayne Wanhong Yang A. A. Voinov Russell G. Richards Rodger Tomlinson

An on-going challenge for decision makers is the interpretation of temporal trends from monitoring data given that environmental processes often generate complex data that are multivariate and potentially nonlinear. Generalized additive models (GAMs) is a wellsuited modelling framework for uncovering such trends and unifying datasets. This approach allows flexible specification of regression sp...

2007
Jean K. Krejca

Troglobites, or species restricted to caves, commonly have small ranges and high levels of endemism, making them extremely sensitive to relatively small-scale habitat alteration that results from urbanization. Protection of federally listed endangered troglobites in central Texas focuses on caves that are occupied by the species. The determination of occupancy is based on presence/absence surve...

Journal: :Ecography 2022

1) Species distribution models (SDMs) are currently the main tools to derive species niche estimates and spatially explicit predictions for geographical distribution. However, unobserved environmental conditions ecological processes may confound model if they have direct impact on and, at same time, correlated with observed covariates. This, so-called spatial confounding, is a general property ...

Journal: :Ecology 2013
José J Lahoz-Monfort Byron J T Morgan Michael P Harris Francis Daunt Sarah Wanless Stephen N Freeman

With environmental conditions changing rapidly, there is a need to move beyond single-species models and consider how communities respond to environmental drivers. We present a modeling approach that allows estimation of multispecies synchrony in productivity, or its components, and the contribution of environmental covariates as synchronizing and desynchronizing agents. We apply the model to l...

اصغری , محمد رضا , نعیمی پوریونسی, حسین , فرهنگ فر , همایون ,

A total of 1256 records associated with body weight and Cashmere at different ages (birth and 3 and 9 months) obtained from 754 Cashmere goats were used to estimate the genetic parameters in southern Khorasan province during 2000- 2003. A set of univariate animal models including additive and maternal genetic effects and maternal permanent environmental effects as well as the fixed effects of y...

2000
Janne Hämäläinen

Janne Hämäläinen, M.Sc. (Eng.) Product Manager Surface Weather Division Vaisala Helsinki Finland he MILOS 520 Data Collection and Processing System is designed to satisfy the current and future requirements for Automatic Weather Stations that are accurate, reliable and economical in terms of overall costs through the entire life cycle of a system. The MILOS 520 system’s flexible set-up in a Win...

ژورنال: علوم آب و خاک 2008
اصغری , محمد رضا , نعیمی پوریونسی, حسین , فرهنگ فر , همایون ,

A total of 1256 records associated with body weight and Cashmere at different ages (birth and 3 and 9 months) obtained from 754 Cashmere goats were used to estimate the genetic parameters in southern Khorasan province during 2000- 2003. A set of univariate animal models including additive and maternal genetic effects and maternal permanent environmental effects as well as the fixed effects of y...

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