The majority of diseases caused by air pollution, such as asthma and allergies, are caused by pathogenic bacteria, which are transmitted through bioaerosols. Bacteria and fungi are the main sources of hospital infections causing the majority of diseases and cases of mortality. The aim of this study was to determine the ratio of indoor to outdoor fungi concentration, the effect of population den...

This work addresses the problem of video surveillance of outdoor environments with unmanned aerial vehicles (UAV). Specifically it proposes a two-step approach, with an initial offline stage in which a mosaic of the zone to be monitored is built from video sequences. The second step tackles with the problem of online detection of relevant differences between the acquired images and the mosaic m...

This paper deals with road detection in an outdoor environment. By comparison with preceding approaches, which use various sensors, our system uses only a monocular camera. In this paper, we propose a novel approach a fusion of frequency based vanishing point estimation and probabilistically based color segmentation.

Based on comprehensive analysis of 3D property right objects and various application characteristics, in this paper, a novel conceptual model is proposed for solving the problems of integrated management and registration of overlapping and interlocking buildings and their interior property situations in real 3D environment, as well as the asynchronous change feature within building in more micr...

We describe the CMU Sidewalk Navigation System, which can drive a vehicle in the outdoor environment of the CMU campus. The system includes all modules necessary for outdoor navigation .. modules for route planning, local path planning, vehicle driving, perception, and map data. The perception module uses sensor fusion with color and rage data to analyze complex outdoor scenes accurately and ef...

This paper presents a framework to perform outdoor photometric stereo by utilizing environment light. We present the main considerations in designing the framework and steps of the processing pipeline. Our framework extends existing algorithms to meet the robustness and variability necessary to operate out of a laboratory environment. We verify our environment light photometric stereo framework...

Airborne fungal samples were collected on a monthly basis for 10 years, from 1995 to 2005, at a tertiary university hospital. Paired samples were cultured at 25 and 37 degrees C. Data were interpreted according to the air filtration systems serving each location. Samples cultured at 37 degrees C from the patient care areas had a mean recovery of 18% of the mean recovery from outdoor air (22 ver...

Older residents of high-deprivation areas walk less than those of low-deprivation areas. Previous research has shown that neighborhood built environment may support and encourage outdoor walking. The extent to which the built environment supports and encourages walking is called "walkability". This study examines inequalities in neighborhood walkability in high- versus low-deprivation areas and...