Quantum algorithms: A?survey of some recent results

Quantum algorithms are a field of growing interest within the theoretical computer science as well as the physics community. Surprisingly, although the number of researchers working on the subject is ever-increasing, the number of quantum algorithms found so far is quite small. In fact, the task of designing new quantum algorithms has been proven to be extremely difficult. In this paper we give an overview of the known quantum algorithms and briefly describe the underlying ideas. Roughly, the algorithms presented are divided into hidden subgroup type algorithms and in amplitude amplification type algorithms. While the former deal with problems of group-theoretical nature and have the promise to yield strong separations of classical and quantum algorithms, the latter have been proved to be a prolific source of algorithms in which a polynomial speed-up as compared to classical algorithms can be achieved. We also discuss quantum algorithms which do not fall under these two categories and give a survey of techniques of general interest in quantum computing such as adiabatic computing, lower bounds for quantum algorithms, and quantum interactive proofs.     

Meta-analysis: a tool for medical and scientific discoveries.

Medicine has made increasing use of meta-analysis, largely as a quantitative procedure for combining results of clinical trials. Meta-analysis begins with a comprehensive review of the literature. The next step is a systematic analysis of the quality and content of each study. Finally, results are combined statistically and conclusions are drawn from this new overview of the data. This paper presents a brief historical perspective on the use of meta-analysis in medicine with emphasis on the medical library. The authors conclude that in the future, medical librarians will play a significant role in the application of this useful technique.     

Chaos theory, informational needs, and natural disasters

This study applies chaos theory to a system-wide analysis of crisis communication in a natural disaster. Specifically, we analyze crisis communication during the 1997 Red River Valley flood in Minnesota and North Dakota. This flood, among the worst in modern American history, consumed entire metropolitan areas, displacing thousands of people. The conditions and decisions leading to the disaster, and the subsequent reactions are retraced. Communication related to river crest predictions (fractals), the shock at the magnitude of the crisis (cosmology episode), novel forms of reorganizing (self-organization), and agencies that aided in establishing a renewed order (strange attractors) are evaluated. Ultimately, we argue that preexisting sensemaking structures favoring rationalized, traditional views of a complex system led officials to make inappropriately unequivocal predictions and ultimately diminished the effectiveness of the region's crisis communication and planning.     

高校体育管理方法与模式的探讨

现代高校体育工作在突飞猛进的世界高等教育之中 ,必须剔除陈旧的管理观念 ,运用现代管理方法和手段 ,结合学校实际 ,进行科学的管理 ,使高校体育工作沿着现代高等教育的发展方向前进。     

试论体育的社会功能

体育是人类社会产生以来渗透在人类社会生活中的一个比较复杂的社会现象 ,是社会生活与发展的重要组成部分 ,是人类社会发展的必然产物 ,也是社会发展的动力之一。概括起来 ,体育有健身功能、教育功能、娱乐功能、军事功能、经济功能和政治功能。     

NBA新规则给我们带来的几点思考

NBA联盟顺应市场需求，对4条旧规则进行大胆的修订，使NBA赛场给人耳目一新的感觉，NBA向全球化发展又迈进了一步，针对这种现状，进行分析并提出几点建议，以供参考。     

对体育系学生运动损伤的调查分析

对信阳师院体育系134名学生进行了运动损伤调查,结果表明男生的损伤发病率为75%,女生为46.2%.其损伤特点男生多是急性伤,女生多是慢性劳损伤,损伤呈多发性.造成学生受伤最多的运动项目依次为篮球、田径、足球、体操.建议学生要遵守课堂纪律,课前充分做好准备活动;教师要合理安排场地器材,注重研究教法.