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introduction the distribution and dispersion of parks and green spaces is of paramount importance in urban and rural areas. as an indicator in development of nations, green space has environmental, social, cultural, economic and physical dimensions. to be able to perform its roles and functions successfully, green space needs to be properly positioned. this requires spatial suitability analysis...

Computational grids interconnect hundreds of heterogeneous computing resources from geographically remote sites, designed to meet the large demands of many users from scientific and business domains. A job initiated at one site can be executed by any of the computing resources. Therefore, response time of a job includes processing delay at the site of execution and communication delay for trans...

Abstract With the development and wide applications of wireless communication technology, limited spectrum resources fixed allocation policy could no longer satisfy demand for communication. Just this reason, many become holes because they are allocated but not used. Cognitive radio is now becoming one most important techniques high utility these holes. If available to cognitive users abundant ...