OBJECTIVES Recreational sports are important leisure activities. However, most studies investigating barrier factors and motivation for participation in recreational sports have been limited to specific areas (e.g., a city or school) or demographic groups (e.g., adolescents). Therefore, this study set out to gain a more comprehensive understanding of the behavioral and socioeconomic factors inf...

We constructed differential equation models for the diurnal abundance and distribution of breeding glaucous-winged gulls (Larus glaucescens) as they moved among nesting and non-nesting habitat patches. We used time scale techniques to reduce the differential equations to algebraic equations and connected the models to field data. The models explained the data as a function of abiotic environmen...

ISSUE ADDRESSED This paper considers the role of ethics and ethics review processes in the development of health promotion quality assurance and evaluation activities involving human participants. CONTENT The Australian National Health and Medical Research Council (NHMRC) National Statement on Ethical Conduct in Human Research and associated documents provide the framework for the ethical con...

Research in extremely delicate environments must be sensitive to the need to minimize impacts caused simply through the presence of research personnel. This study investigates the effectiveness of current advice relating to travel on foot over Antarctic vegetation-free soils. These are based on the concentration of impacts through the creation of properly signed and identified paths. In order t...

Although the importance of undergraduate research experiences in preparing students for graduate study and research careers is well documented, specific examination of program components is needed to assess the impact of these programs on underrepresented (UR) students. The Leadership Alliance, a consortium of leading PhD-granting and minority-serving institutions (MSIs), has leveraged its dive...

This paper develops a simple model of land use with roots in von Thunen's work. A cross-section version of the model is estimated with data from a satellite image and other geographical sources for a region in central Mexico. Parameters from the model are used to examine the effects of reduced human activity. If variables that proxy human influence are changed to reflect reduced impact, " fores...