Most parts of the urban areas are faced with the problem of floating fine particulate matter. Therefore, it is crucial to estimate the amounts of fine particulate matter concentrations through the urban atmosphere. In this research, an artificial neural network technique was utilized to model the PM2.5 dispersion in Tehran City. Factors which are influencing the predicted value consi...

INTRODUCTION Malnutrition is a serious public health problem, particularly in developing countries, linked to a substantial increase in the risk of mortality and morbidity. Women and young children are most often affected. Rural disadvantage is a known factor, but little attention has been paid to rural-urban disparity among women. To provide a reliable source of information for policy-makers, ...

Abstract The actually urban dynamics lead to some difficulties in the global apprehension of the city. According to commuters weighted graphs between localities, we propose a new approach to understand those dynamics. Working successively on three scales (urban areas perimeters, sub-centres and each locality), the topic of this research is to measure and visualize the cohesion and the fragmenta...

Abstract –The propagation path loss models may give different results if they are used in different environment other than in which they were designed. In this paper we compare the different path loss propagation models with measured field data. For comparative analysis we use the log distance path loss model, Stanford University Interim (SUI) Model, Hata model, Okumura’s Model, COST231 Extensi...

Recently, researchers working in the fields of computer graphics and computer vision have shown tremendous interests in reconstructing urban scenes. For this task, the acquisition of the 3D point clouds is the first step, for which scans are usually widely utilized. Nevertheless, on seeing the potential drawbacks of scans, in this paper, we propose a novel urban scene reconstruction system base...

In this paper, the effect of urban heat island is analyzed using the Landsat TM data and ASTER data in 2005 as a case study in Hong Kong. Two algorithms were applied to retrieve the land surface temperature (LST) distribution from the Landsat TM and ASTER data. The spatial pattern of LST in the study area is retrieved to characterize their local effects on urban heat island. In addition, the co...

According to the UN, the number of urban dwellers is expected to increase from roughly 3.2 billion today to more than 4.9 billion by 2030. An accurate and regularly updated estimate of the extent and spatial distribution of urban land is an important first step in our search for realistic responses to the ecological and social consequences of what promises to be the most rapid urbanization in w...

We present measurements of C1–C8 volatile organic compounds (VOCs) at four sites ranging from urban to rural areas in Hong Kong from September 2002 to August 2003. A total of 248 ambient VOC samples were collected. As expected, the urban and sub-urban sites generally gave relatively high VOC levels. In contrast, the average VOC levels were the lowest in the rural area. In general, higher mixing...

The role of domestic cats Felis catus in the troubling, on-going decline of many urban bird populations in the UK is controversial. Debate, in the UK and elsewhere, has centred on the level of avian mortality directly imposed by cats, and on whether this is principally compensatory (the ‘doomed surplus’ hypothesis) or additive (the ‘hapless survivor’ hypothesis). However, it is well established...