arid and semi-arid areas, due to the sensitive, have variable ecosystems, so continuous assessment and monitoring of the environment is required for most of managerial and adjustment practices. vegetation is one of the most important assessment tools and used as a criterion for evaluation and monitoring of ecosystem functions. in this study, for the first time in the country, we have evaluated ...

The purpose of this paper is to present two agents’ societies responsible for group formation (sub-communities) in CV-Muzar (Augusto Ruschi Zoobotanical Museum Virtual Community of the University of Passo Fundo). The first is a static society that intends to investigate the groups in the CV-Muzar. The second is a dynamical society that will analyze the existing groups and look for participants ...

As first steps towards establishing software engineering as an engineering discipline, we need to create explicit models of its building blocks, i.e., projects, processes, products, and various quality perspectives; organize these models for effective reuse across project boundaries; and establish measurable criteria for project guidance. This paper investigates the possibilities of providing m...

A survey was conducted from March to September 2012 along the altitudinal gradient of the Jomokungkhar trail in the Merak Himalaya of Sakteng Wildlife Sanctuary to study the floristic compositions and the patterns of alpine vegetation of Eastern Bhutan. The vegetation of the sampled plots is classified into five types of communities based on the hierarchical cluster analysis at similarity index...

For studying vegetation cover in Choghakhor wetland located in Chaharmahal-o-Bakhtiari province (W Iran), some zones of vegetation life forms were determined and also digitized in order to produce the primary map of plant cover by using LISS-IV sensor of IRS satellite with the spatial resolution of 5.8 m. As aquatic plants in Choghakhor wetland were fully grown, homogeneity or heterogeneity of ...

one of the characteristics in iranian model of desertification potential assessment (imdpa) is vegetation. sincevegetation is very important factor in the degradation of land, so some indices were determined for this item in order toevaluate desertification potential of arid, semi arid and arid sub humid areas of iran. the indices included vegetationcondition, exploit and revegetation. to calib...

In this paper, we discuss some key aspects for the maintenance of biological diversity in grassland–forest mosaics in southern Brazil (Campos Sulinos) not explored yet. Campos Sulinos are grasslands distributed throughout the Pampa and the Atlantic Forest biomes. Since these grasslands remain from past dryer and colder climatic conditions, they are acknowledged as native rather than anthropogen...

there are many reports of serious problems of dust storm events in the western parts of iran. based on many researches, iraq is one of the main sources of dust storms in western parts of iran. the radial basis function network (rbfn) model has been used to assess wind erosion hazard in iraq as a main source area of dust storms over several western cities of iran. the percentage of vegetation is...