This paper proposes a novel generalisation model for selecting characteristic streets in an urban street network. This model retains the central structure of a street network. It relies on a structural representation of a street network using graph principles where vertices represent named streets and links represent street intersections. Based on this representation, so-called connectivity gra...

To better assess and understand potential health risk of urban residents exposed to urban street dust, the total concentration, sources, and distribution of 16 polycyclic aromatic hydrocarbons (PAHs) in 87 urban street dust samples from Tianjin as a Chinese megacity that has undergone rapid urbanization were investigated. In the meantime, potential sources of PAHs were identified using the prin...

Street art opens a new, broad research field in the context of urban communication and sound aesthetics in public space. The primary focus of this article is the relevance and effects of using sound technologies and audio devices to shape urban landscape and soundscape. This paper examines the process of developing an alternative type of street art that uses sound as its medium. It represents m...

Quality is the most important consequence of an urban design project, and its promotion is the final duty of an urban designer. So "urban design guidelines" which use environmental improvement factors in their structure, have an effective role in promoting urban space quality. "Urban design guidelines" are the most important instruments in urban designers' authority, to reflect and appear im...

The goal of this paper is to present bluff body flow and transport from steady point sources of pollutants, or chemical and biological agents in an idealized urban environment This paper includes ventilation behavior in different street canyon configurations. To evaluate dispersion in a model urban street canyon, a series of tests with various street canyon aspect ratios (B=H) are presented. Bo...

To a large extent, this thesis will investigate how 13th Street was successfully revitalized using a strategy similar to that of the National Trust for Historic Preservation’s Main Street Program, a broadly applied framework for the revitalization of historic commercial centers in downtown communities nationwide. The success of the Main Street program, as outlined in its Four-Point Approach to ...

Trees are essential to urban habitats because they provide services that benefit the environment and improve human health. Unfortunately, urban trees often have more herbivorous insect pests than rural trees but the mechanisms and consequences of these infestations are not well documented. Here, we examine how temperature affects the abundance of a scale insect, Melanaspis tenebricosa (Comstock...

Numerous urban field observations have been devoted to understanding the characteristics of flow and turbulence in urban street canyons. However, cities comprise complex road networks incorporating not just idealised street canyons, but realistic geometries including intersections. Street intersections are a second basic element of urban geometry that are critical in dispersion processes. They ...

Tourism is rapidly developing as a profitable and clean industry in the world. Today, tourists consider urban areas as tourist attractions since, in addition to the body which has its own charm,every space is dominated by an identity. In this descriptive, comparative study, the criteria determining the urban space identity are attempted to be specified through documentary studies. Then, 105 que...

1-      introduction the increasing growth of urbanization in recent decade and occurring most of the economic and social activities of human being in urban environments cause that the city is considered as a place a citizen spends much time and it is one of the effective and important places in which the majority of memories, experiences, emotions are formed. thus, cities play important role i...