نتایج جستجو برای: slope change

تعداد نتایج: 638710  

Journal: :Journal of Multivariate Analysis 1988

2012
Chris R. McGuire César R. Nufio M. Deane Bowers Robert P. Guralnick

Determining the magnitude of climate change patterns across elevational gradients is essential for an improved understanding of broader climate change patterns and for predicting hydrologic and ecosystem changes. We present temperature trends from five long-term weather stations along a 2077-meter elevational transect in the Rocky Mountain Front Range of Colorado, USA. These trends were measure...

Journal: :Physiological and biochemical zoology : PBZ 2013
Ashley S Vorhees Emilie M Gray Timothy J Bradley

The abundance and success of widely distributed species across variable environments make them suitable models for exploring which traits will be important for resilience to climate change. Using a widespread mosquito species, Culex tarsalis, we have investigated population-level variation in the critical thermal maximum (CT(max)) and the metabolic response to temperature (MR-T). Adult female C...

Journal: :Revista de biologia tropical 2013
Sarah Cunningham Hector M Guzman Richard Bates

The Hannibal Bank sits within the Coiba UNESCO World Heritage Site in Pacific Panama and is also a fisheries management zone. Despite the protected status of the area and the importance of the Bank for commercial fish species such as snapper and tuna, the seamount has received no detailed survey except some collection of organisms. This study mapped the major topographic features and complexity...

2012
Yafeng Wang Katarina Čufar Dieter Eckstein Eryuan Liang

Little is known about tree height and height growth (as annual shoot elongation of the apical part of vertical stems) of coniferous trees growing at various altitudes on the Tibetan Plateau, which provides a high-elevation natural platform for assessing tree growth performance in relation to future climate change. We here investigated the variation of maximum tree height and annual height incre...

2014
Marco Hofmann Robert Lux Hans R. Schultz

Grapes for wine production are a highly climate sensitive crop and vineyard water budget is a decisive factor in quality formation. In order to conduct risk assessments for climate change effects in viticulture models are needed which can be applied to complete growing regions. We first modified an existing simplified geometric vineyard model of radiation interception and resulting water use to...

Journal: :Statistics in medicine 2010
Kingshuk Roy Choudhury Ian Kasman Greg D Plowman

Xenograft trials allow tumor growth in human cell lines to be monitored over time in a mouse model. We consider the problem of inferring the effect of treatment combinations on tumor growth. A piecewise quadratic model with flexible phase change locations is proposed to model the effect of change in therapy over time. Each piece represents a growth phase, with phase changes in response to chang...

2016
Gonéri Le Cozannet Carlos Oliveros Bruno Castelle Manuel Garcin Déborah Idier Rodrigo Pedreros Jeremy Rohmer

In the current practice of sandy shoreline change assessments, the local sedimentary budget is evaluated using the sediment balance equation, that is, by summing the contributions of longshore and cross-shore processes. The contribution of future sea-level rise induced by climate change is usually obtained using the Bruun rule, which assumes that the shoreline retreat is equal to the change of ...

2012
Alexander Pfaff Juan Robalino

Policies must balance forest conservation’s local costs with its benefits—local to global—in terms of biodiversity, the mitigation of climate change, and other eco-services such as water quality. The trade-offs with development vary across forest locations. We argue that considering location in three ways helps to predict policy impact and improve policy choice: (i) policy impacts vary by locat...

2008
Ken Kelley Scott E. Maxwell Steven M. Boker David A. Smith Joseph R. Rausch

The average rate of change is a concept that has been misunderstood in the literature. This article attempts to clarify the concept and show unequivocally the mathematical definition and meaning of the average rate of change in longitudinal models. The slope from the straight-line change model has at times been interpreted as if it were always the average rate of change. It is shown, however, t...

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