This issue of the Journal of Symbolic Computation collects selected papers on work presented at, or related to, the meeting MEGA 2005, held in Porto Conte, Alghero, Sardinia (Italy), May 27 June 1, 2005. MEGA is the acronym for “Effective Methods in Algebraic Geometry” (and its equivalent in Italian, French, Spanish, German, Russian, etc.), a series of (roughly) biennial conferences on computin...

This paper explores the relevance of the Elaborated Social Identity Model of Crowd Behaviour and Procedural Justice Theory to an understanding of both the presence and absence of collective conflict during football (soccer) crowd events. It provides an analysis of data gathered during longitudinal ethnographic study of fans of Cardiff City Football Club—a group of supporters with a notorious hi...

The worth and important Iranian tradition is still unknown in most of the World and there is much humanity life style and building teqniques, according to its natural sources such as Earthen Architecture in different parts of Iran such as Yazd City, as “The World First Adobe”. Having a highly developed technology make these vernacular buildings still alive, by using an incredible use of natural...

Vertical cities’ growth is argument of discussion worldwide. Population increases and a better soil use are needed, in terms of efficiency and density, in many cities of the world. However, an excessive vertical growth seems to be harmful, especially near the green areas of midtowns. In this paper, the case of Antofagasta is studied. The paper studies different possible future evolutions search...

As the increase threat of flood risk and environmental safety due to the urbanization, Sponge city research has been attracting extensive attention both in practical and theoretical research field. To date, there are only scattered studies about Sponge city. Moreover, vary names of Sponge city prevalent in different countries, which leads to disconnection of literature in the same field of Spon...

The human pressure on natural ecosystems and protected areas is steadily increasing. Urban growth is undeniably and irreversibly converting natural habitats as it is constantly expanding with population growth. In this study we analyze the urban expansion of mega city Calcutta over four time-steps (1975, 1990, 2000, 2010) as an example of expansion over time and threat to the surrounding enviro...