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The Bumblebees of North China (Apidae, Bombus Latreille)
Bumblebees are important pollinators for wild flowers and agricultural crops. North China is a region of varied geomorphology and vegetation, with plateaus, plains, mountains and deserts, and is part of the greatest hotspot of bumblebee diversity worldwide. We report on a field survey of the bumblebees of North China made between 2005-2012. A sample of 21,636 bumblebee specimens are assigned to 76 species. One older specimen held in London added one more species to this list. Together, these 77 species represent 10 subgenera of the genus Bombus. Seven species are recorded from North China for the first time: B. (St.) distinguendus, B. (Th.) anachoreta, B. (Th.) pseudobaicalensis, B. (Th.) ex...
Natural Resources Utilization in China
This book focuses on the evaluation, coordination, and effects of China’s natural resource utilization. By adopting both quantitative and qualitative analyses, this book objectively evaluates the spatial distribution characteristics and coupling relationship of China’s natural resource utilization based on the status quo and prominent problems during resource utilization. Moreover, the environmental, economic, and price fluctuation effects of China’s natural resource utilization are discussed. Finally, current policy systems for efficient utilization of natural resources in China and abroad are provided, which suggest a way for China to achieve efficient utilization of natural resource...
Field-effect Self-mixing Terahertz Detectors
A comprehensive device model considering both spatial distributions of the terahertz field and the field-effect self-mixing factor has been constructed for the first time in the thesis. The author has found that it is the strongly localized terahertz field induced in a small fraction of the gated electron channel that plays an important role in the high responsivity. An AlGaN/GaN-based high-electron-mobility transistor with a 2-micron-sized gate and integrated dipole antennas has been developed and can offer a noise-equivalent power as low as 40 pW/Hz1/2 at 900 GHz. By further reducing the gate length down to 0.2 micron, a noise-equivalent power of 6 pW/Hz1/2 has been achieved. This thesis provides detailed experimental techniques and device simulation for revealing the self-mixing mechanism including a scanning probe technique for evaluating the effectiveness of terahertz antennas. As such, the thesis could be served as a valuable introduction towards further development of high-sensitivity field-effect terahertz detectors for practical applications.
Water Security: Big Data-Driven Risk Identification, Assessment and Control of Emerging Contaminants
Water Security: Big Data-Driven Risk Identification, Assessment and Control of Emerging Contaminants contains the latest information on big data–driven risk detection and analysis, risk assessment and environmental health effect, intelligent risk control technologies, and global control strategy of emerging contaminants. First, this book highlights advances and challenges throughout the detection of emerging chemical contaminants (e.g., antimicrobials, microplastics) by sensors or mass spectrometry, as well as emerging biological contaminant (e.g., ARGs, pathogens) by a combination of next- and third-generation sequencing technologies in aquatic environment. Second, it discusses in depth t...
Environmental Legacies of the Copernican Universe
In Environmental Legacies of the Copernican Universe, Jean-Marie Kauth shows how counter-ecological metaphors sprung from the cosmology of the Copernican Revolution influence us still in unexpected, maladaptive ways, nurturing conceptions of the world that are not only incorrect but enabling of ecocide. She argues that grasping these underlying paradigms may help us to alter our thinking and make the radical transformations needed to counter the forward motion of our capitalist, post-industrial society.
Game Theory Framework Applied to Wireless Communication Networks
The popularity of smart phones and other mobile devices has brought about major expansion in the realm of wireless communications. With this growth comes the need to improve upon network capacity and overall user experience, and game-based methods can offer further enhancements in this area. Game Theory Framework Applied to Wireless Communication Networks is a pivotal reference source for the latest scholarly research on the application of game-theoretic approaches to enhance wireless networking. Featuring prevailing coverage on a range of topics relating to the advanced game model, mechanism designs, and effective equilibrium concepts, this publication is an essential reference source for researchers, students, technology developers, and engineers. This publication features extensive, research-based chapters across a broad scope of relevant topics, including potential games, coalition formation game, heterogeneous networks, radio resource allocation, coverage optimization, distributed dynamic resource allocation, dynamic spectrum access, physical layer security, and cooperative video transmission.
