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Wireless communication systems

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Welcome to the 51st SIGCSE Technical Symposium on Computer Science Education (the 2020 Symposium), the premiere technical conference for computing educators. The 2020 Symposium is sponsored by the Association for Computing Machinery (ACM) Special Interest Group on Computer Science Education (SIGCSE). SIGCSE has the third largest membership of any of ACM's Special Interest Groups (SIG), and is among the oldest SIGs. Only ten SIGs were founded prior to 1968 when SIGCSE was formed. Last year, we marked the 50th anniversary of the Symposium. Only six SIGs have held conferences with 50+ iterations. We truly have a history to celebrate and we did celebrate with a series of events that honored our past and we are coming into 2020 looking forward to our next 50 years. One of the most exciting things about the Symposium is the fact that it continues to grow. I made a bold prediction last year that we will see 2020 attendance in 2020. Our submission rates for this year's conference broke records again. The conference organizing committee rose to the challenge of accommodating the clear demand from the community while maintaining the character of a conference that so many look forward to each year by adding a full session of papers, panels, and special sessions after the traditional Saturday lunch. As our community continues to grow, these challenges will continue to face our conference. The board and the conference organizing committees are continually looking for ways to incorporate growth while maintaining the character of our event. The Symposium is about the people, community, and a desire to become better computing educators and it is important to celebrate and honor that every year. Speaking of the SIGCSE Board, I would like to take a moment to remind everyone that this is the first conference for the new SIGCSE Board (2019-2022). All of the members of the current board are at the conference and are very interested in hearing what we as a board can do for the community during our term on the board. Please feel free to reach out during the conference or after with feedback to the board about the event or any other aspect of SIGCSE. As an attendee, it is often difficult to imagine the amount of time and effort needed to put together an event the size of the Symposium. There are countless hours, handling crises that arise (big and small), and coordinating a committee of nearly 100 volunteers that help shape the program and events of the conference. It truly is a dedication to the community and the conference that motivates Symposium chairs to do their job. While it may be my honor on behalf of the SIGCSE organization and Board to be the first to thank them for their hard work this past year, I would like to not be the last. Feel free to reach out to the conference co-chairs Jian Zhang and Mark Sherriff and program co-chairs Sarah Heckman, Pamela Cutter and Alvaro Monge and thank them as you see them over the next few days. Our conference provides us with a chance to honor two people for their contributions to computer science education and the SIGCSE community. The annual SIGCSE award for Outstanding Contribution to Computer Science Education will be given to Lauri Malmi (Aalto University/Helsinki University of Technology). Lauri is world leader in computer science education research focusing on automatic assessment and program and algorithmic visualization. For over 20 years, he has been producing high quality publications and has won several awards, most recently, the best paper award at ICER 2019. He has also supervised 17 iv computing education PhD students. Starting in his native Finland, Lauri has led initiatives to disseminate computing education tools and research among university faculty. However, his reach is much larger, including his work to expand the Koli Calling conference to be an international venue for computer science education research, his work with the Scandinavian Pedagogy of Programming network and his editorial board work (ACM Inroads, ACM TOCE, IEEE Transactions on Learning Technologies). Lauri was also co-chair of ICER 2016 and 2017 and helped to lead major changes to the structure and reviewing for the conference. Lauri has truly helped to shape the global computing education community.

Electronic data processing --- Study and teaching (Higher)

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Complementary Modernisms in China and the United States: Art as Life/Art as Idea is the result of a conference where Chinese and Americanist art historians addressed the development of modernism in their respective cultural traditions. The chapters juxtapose historical developments without attempting to map connections or influences. Instead, both national modernisms are presented as part of the larger terrain of global modernism, but generated within specific, localized circumstances. This juxtaposition reveals significant differences as much as any particular moments of connection or similarities, disrupting any standard narrative of the primacy of French (or European) avant-garde art and its influence on more belated and peripheral communities.The differences that are revealed are not merely the result of the very different historical trajectories of each country’s moves into modernity. Rather, differences in attention and methodology are just as important, in particular the focus on the post-1980 development of Chinese art as part of the modernization of Chinese culture and economy, rather than the American perspective on post-1980s postmodern qualities. At the same time, significant convergent concerns emerge, such as the importance of urban centers and urbanization, the profound effect of political and technological disruption, and the question of identity.The volume represent a cross-section of Chinese and Americanist art historians, both early career and senior scholars, working on a wide variety of subjects, such as the Ashcan School, Impressionism, Cai Liang, Liang Sicheng, Huang Binhong, Cézanne, Bauhaus, Joseph Cornell, Andrew Wyeth, Louise Nevelson, Jackson Pollock, Andy Warhol, and contemporary art more broadly, with (as is usual in any survey of the 20th century these days) a concentration on the 1960s.《交互视野下的中国和美国的现代艺术: 艺术/生活或观念》这一会议论文集收录了中美艺术史家对现代主义在各自传统下的发展进行研究所得的成果。这些文章并置历史发展，而非试图详述其中的关联或影响。相反，两个国家的现代主义都被展现为全球现代主义大背景中的一部分，并被认为是在特定环境中产生的。这种并置显示了重要的差异性以及任何特殊情况下的联系或相似之处，打破了一般强调法国（或欧洲）先锋派首要地位及其对周围团体产生影响的标准论述。中国与美国现代主义发展上的差异，并不仅仅是由于两国进入不同历史轨道发展现代化而导致的。相反，关注点和方法论的差异也同样重要，尤其是关注八十年代后中国艺术的发展，将其作为中国文化与经济现代化的一部分，而不是从美国视角来看待八十年代后的后现代价值。同时，也出现了重要的趋同关注点：城市中心与城市化的重要性，政治或科技解体所造成的深远影响，以及自我认同的问题。本论文集所收录的文章，彰显了当今重要的中美艺术史家研究的多样性，从资深到青年一代，从阿什坎学派至当代艺术，（并与任何当下对二十世纪作出的概括论述相一致，）将重点放在二十世纪六十年代。

Art & design styles: from c 1960 --- modernism --- art history --- China --- United States --- art criticism --- postmodernism --- avantgarde

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Religious studies --- History of Asia --- China

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This study examines the major constraints of rural business entry and performance in Yemen. The Yemen rural investment climate survey made it possible to analyze rural investment climate constraints for rural businesses. The survey was used to investigate both farm and nonfarm rural enterprises. The rural investment climate was assessed using a combination of subjective impressions related by rural entrepreneurs, and a more objective, empirical set of analyses that employed indicators to rank the constraints to "doing business" in the areas surveyed. These empirical analyses included application of the entry model, the performance model, the closure model, and the migration model. The migration model was introduced to identify how the rural investment climate variables at the community level increase migration and economic activities. Based on the assessment of the rural investment climate, this paper identifies and explains four critical areas in which the rural investment climate in Yemen can be improved: market demand, access to markets, access to finance, and the provision of business services. Because farm and nonfarm businesses often experience common or similar constraints, the climate in which they operate can often be improved with the same measures and policies. Addressing the constraints that affect rural women entrepreneurs in particular, who play a vital role in rural nonfarm enterprises, warrants clear priority as a means to generate income and employment. Security and labor issues are identified as the key such constraints that disproportionately affect women.

Access to Finance --- Agriculture --- E-Business --- Farm Enterprise --- Financial Literacy --- Nonfarm Enterprise --- Rural Development --- Rural Entrepreneurs --- Rural Investment Climate --- Rural Poverty Reduction --- Transport Economics Policy & Planning --- Yemen