CENTER AND PERIPHERY: BORDERLINE CITIES AND BORDERLINES OF CITIES

The Center and Periphery of Composite Graphs

The center (periphery) of a graph is the set of vertices with minimum (maximum) eccentricity. In this paper, the structure of centers and peripheries of some classes of composite graphs are determined. The relations between eccentricity, radius and diameter of such composite graphs are also investigated. As an application we determine the center and periphery of some chemical graphs such as nan...

Cities and population health.

A majority of the world's population will live in urban areas by 2007 and cities are exerting growing influence on the health of both urban and non-urban residents. Although there long has been substantial interest in the associations between city living and health, relatively little work has tried to understand how and why cities affect population health. This reflects both the number and comp...

Forests and Sustainable Cities

Agents and Their Cities

The interactive Web seems a natural place for the use of agent technology, to bring access to e-services with solutions to dynamic, open and changing environments. However, agent technology is still quite low key in this expanding area of Internet access and e-business space. Part of the reason for this has been the lack of a large-scale test-bed. Some fundamental changes in the development of ...

Cities and Competitiveness

Improved competitiveness, as we all know, is the path to economic nirvana. Plainly, it is a sought after property of any economy: the term trips frequently off the lips of politicians and commentators on economic and business matters. As cities increasingly engage in competition with one another at different levels, the determinants of competitive advantage are coming under intense scrutiny. Ma...