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Cognitive Radio Networks
This SpringerBrief presents a survey of dynamic resource allocation schemes in Cognitive Radio (CR) Systems, focusing on the spectral-efficiency and energy-efficiency in wireless networks. It also introduces a variety of dynamic resource allocation schemes for CR networks and provides a concise introduction of the landscape of CR technology. The author covers in detail the dynamic resource allocation problem for the motivations and challenges in CR systems. The Spectral- and Energy-Efficient resource allocation schemes are comprehensively investigated, including new insights into the trade-offs for operating strategies. Promising research directions on dynamic resource management for CR and the applications in other wireless communication systems are also discussed. Cognitive Radio Networks: Dynamic Resource Allocation Schemes targets computer scientists and engineers working in wireless communications. Advanced-level students in computer science and electrical engineering will also find this brief useful reading about the next generation of wireless communication.
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English-Spoken Khmer Dictionary
This is a unique learning aid for making rapid headway in the acquisition of comprehension and speaking ability in Khmer, the language of Cambodia. In recent years, Cambodia has moved from a society menaced by war to a society orientated to commerce. With this shift in attention from military to social and economic matters has come an increase in the numbers of foreign visitors and residents in the country for the purposes of tourism, aid work or investment-related activities. Many of these foreigners or 'chun bor-tay' speak English as a first or second language, but know little of written or spoken Khmer. This dictionary is designed to enable residents and visitors to better understand both the country and its people through speaking to Cambodians in their own language. With more than 6,000 key word entries, the "English-Spoken Khmer Dictionary" has the distinctive feature of presenting Khmer words in an all-new easily grasped Romanized writing system. Incorporating phrases is essential for tourists, business travellers, scholars and long term Cambodia residents who wish to become more familiar with a country poised to play an increasingly significant role in the area.
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