BACKGROUND In order to improve our understanding of the relationship between the built environment and physical activity, it is important to identify associations between specific geographic characteristics and physical activity behaviors. PURPOSE Examine relationships between observed physical activity behavior and measures of the built environment collected on 291 street segments in Indiana...

Editor’s note: NEHA strives to provide up­ to-date and relevant information on envi­ ronmental health and to build partnerships in the profession. In pursuit of these goals, we feature a column from the Environmen­ tal Health Services Branch (EHSB) of the Centers for Disease Control and Preven­ tion (CDC) in every issue of the Journal. In this column, EHSB and guest authors from across CDC will...

Humanity's transition from the outdoor environment to the built environment (BE) has reduced our exposure to microbial diversity. The relative importance of factors that contribute to the composition of human-dominated BE microbial communities remains largely unknown. In their article in this issue, Chase and colleagues (J. Chase, J. Fouquier, M. Zare, D. L. Sonderegger, R. Knight, S. T. Kelley...

The shortest path-searching with the minimal weight for multiple destinations is a crucial need in an indoor applications, especially supermarkets, warehouses, libraries, etc. However, when it used item searches, its becomes higher as searches only path between single sources to each destination separately. If conventional Dijkstra algorithm modified multi-destination mode then decreased, but o...