Human activity hotspots are the clusters of activity locations in space and time, and a better understanding of their functionality would be useful for urban land use planning and transportation. In this article, using trajectory data, we aim to infer the functionality of human activity hotspots from their scaling pattern in a reliable way. Specifically, a large number of stopping locations are...

Since the trajectory data is easily produced, collected and stored the challenge now is to make it useful for various purposes. To this end many location based services are implemented and new data mining/analysis techniques are proposed for better decision making. Privacy requirements, on the other hand, hinder the development of services and analysis as the location data offers intrusive infe...

Volatile organic compounds (VOCs) have been determined to be human risk factors in urban environments, as well as primary contributors to the formation of photochemical oxidants. Ambient air quality measurements of 54 VOCs including hydrocarbons, halogenated hydrocarbons and carbonyls were conducted in or near 13 urban locations in the United States during September 1996 to August 1997. Air sam...

BACKGROUND Measuring the oxidative potential of airborne particulate matter (PM) may provide a more health-based exposure measure by integrating various biologically relevant properties of PM into a single predictor of biological activity. OBJECTIVES We aimed to assess the contrast in oxidative potential of PM collected at major urban streets and background locations, the associaton of oxidat...

OBJECTIVE To compare changes in diagnosed diabetes prevalence and incidence among Status Aboriginal men and women living in urban and rural areas of Alberta. METHODS We compared trends in diabetes prevalence and incidence from 1995 to 2006 based on diagnostic codes from Alberta Health and Wellness (AHW) administrative records for adults aged 20 years and older. The AHW Registry file was used ...

The aim of this study was to isolate and identify airborne fungi from locations in Babol city, Babolkenar forest and a beach on the Caspian Sea (all in North part of Iran) in spring and summer. Of 126 samples collected, the most clinically important isolated fungi were Mucor spp. (18.6%) in the forest, Alternaria spp. (13.4%) at the beach; and Cladophialophora spp. (15.8%), Mucor spp. (11.7%) a...