BACKGROUND This study examines the relationship between race and mobility over 5 years in initially well-functioning older adults and evaluates how a broad set of socioeconomic status indicators affect this relationship. METHODS Data were from 2,969 black and white participants aged 70-79 from the Health, Aging, and Body Composition study. Mobility parameters included self-reported capacity t...

PURPOSE/OBJECTIVES To assess change in specific cognitive processes during treatment with chemotherapy only among children with acute lymphoblastic leukemia (ALL). 
. DESIGN A prospective, repeated measures design.
. SETTING Pediatric oncology treatment centers at Banner-University Medical Center Tucson/Banner Children's-Diamond Medical Center (University of Arizona) and Texas Children's Ca...

BACKGROUND Some studies have analyzed the association of health care systems variables, such as health service resources or expenditures, with amenable mortality, but the association of types of health care systems with the decline of amenable mortality has yet to be studied. The present study examines whether specific health care system types are associated with different time trend declines i...

Despite nearly 100 years of edge studies, there has been little effort to document how edge responses 'cascade' to impact multi-trophic food webs. We examined changes within two, four-tiered food webs located on opposite sides of a habitat edge. Based on a 'bottom-up' resource-based model, we predicted plant resources would decline near edges, causing similar declines in specialist herbivores a...

C.H. Greenberg et al. (eds.), Sustaining Young Forest Communities, Managing Forest Ecosystems 21, DOI 10.1007/978-94-007-1620-9_14, © US Government 2011 Abstract Tree harvests that create early successional habitats have direct and indirect impacts on water resources in forests of the Central Hardwood Region. Streamflow increases substantially immediately after timber harvest, but increases dec...

Matching the trend seen among the major large rivers of the globe, the Amazon River and its tributaries are facing aquatic ecosystem disruption that is affecting freshwater habitats and their associated biodiversity, including trends for decline in fishery resources. The Amazon's aquatic ecosystems, linked natural resources, and human communities that depend on them are increasingly at risk fro...

This study investigates the relationship between environmental degradation and men and women’s family size preferences and subsequent reproductive behaviors in Nepal. We draw on unique environmental data at the local level, household and individual-level survey data and individuals’ reproductive behavior over a 3 year time period in Western Chitwan Valley, Nepal. Results from Ordinary Least Squ...

1. Definitions 1.1. Types of Aridity 1.2. Levels of Aridity 2. Paleoperspective 3. People and Land Use in Arid Lands 3.1. Foragers/Hunter–gatherers 3.2. Agriculturists 3.3. Pastoralists 4. Geomorphology of Arid and Semiarid Lands 5. Biological Diversity in Arid Lands 5.1. Arid and Semiarid Lands Plants and their Uses 5.2. The Future of the Conservation of Wild Plants in Arid Regions 6. Climatic...

This paper reviews the growth behavior of a popular peer-to-peer network. We propose a dynamic hypothesis that the growth, overshoot, and collapse trajectories may be the result of complex causal interactions between inadequate resources, private provision of common goods, free riding, and membership dynamics. We draw parallels with other systems that are well-understood and known to exhibit si...