Mobile Agents for Distributed and Heterogeneous Information Retrieval

The heterogeneous, distributed and voluminous nature of many government and corporate data sources impose severe constraints on meeting the diverse requirements of users who analyze the data. Additionally, communication bandwidth limitations, time constraints, and multiple data formats impose further restrictions on users of these distributed data sources. In this paper, we present an Agent-based Complex QUerying and Information Retrieval Engine (ACQUIRE) for large, heterogeneous, and distributed data sources. ACQUIRE acts as a softbot or interface agent by presenting users with a view of a single, unified, homogenous data source, against which users can pose high-level declarative queries. ACQUIRE translates each such user query into a set of sub-queries by employing a combination of planning and traditional database query optimization techniques. ACQUIRE then spawns a set of mobile agents corresponding to these sub-queries, which in turn retrieve the data from various distributed data sources by dynamically optimizing the retrieval strategy as it is carried out. These mobile agents carry with them data-processing code that can be executed at the remote site, thus reducing the size of data returned by the agent. When all mobile agents have returned, ACQUIRE filters and merges the retrieved data and presents the results to the user. While the system is still very much a work in progress, current validation experiments on simulated NASA Distributed Active Archive Centers (DAACs) have demonstrated that complex queries can be effectively decomposed and retrieved by this approach.     

媒介素养教育对大学生的影响与对策研究

随着新媒体的不断发展,大学生的信息消费理念有了很大的改变。面对庞杂的信息,大学生的媒介素养决定其对信息的理解和取舍,影响其价值取向和行为方式。本文在对大学生媒介素养现状调查的基础上,提出了从开设相关课程、运用学校社团力量、发挥校园媒体优势和制定国家政策等方面提高大学生媒介素养的对策。     

基于CDIO模式的计算机网络技术专业课程群建设

以CDIO为指导思想,并结合计算机网络技术专业的特点,开展针对计算机网络技术专业的课程群建设及实践,提高学生的工程素养、动手能力和团队协作能力,取得了较好的实施效果。     

五四新文化运动前后《教育杂志》作者群体的转变——基于量化的分析

《教育杂志》是近代中国办刊时间最长、影响力最大的教育专业期刊。五四新文化运动前后,《教育杂志》的作者群体发生了显著的转变,包括作者来源及其地域分布的多元化,作者的年轻化和专业化,以及作者求学背景开始从以留日学生为主转变为以留美学生为主,等等。这些变化既体现了《教育杂志》编辑的主观努力,也是五四新文化思潮激荡、留美学生大量归国、新一代教育家崛起等多种因素共同作用下教育界话语权转移的客观反映。     

高校课堂教学现状与教学效果提高研究

重点分析了当今高校课堂教学存在的问题,对于目前高校教学课时大幅减少的情况下如何提高课堂教学效果进行了对策研究.强调教师要注重差异性教学,提高课堂教学的互动性;注重启发式教学,以学生为主体,调动学生在课堂上积极思考,主动参与到课堂教学中来,进而达到素质教育的目的.     

发展心理学视野下的弗洛伊德理论对思想政治教育学的启示

发展心理学视野下的弗洛伊德理论包括弗洛伊德的人格发展理论、弗洛伊德的心理发展阶段说。发展心理学视野下的弗洛伊德理论,启示教师在进行思想政治教育时,要注重潜意识的潜移默化作用,要从自我和谐的角度进行自我教育以实现自我的分化和统合。结合发展心理学视野下的弗洛伊德理论来看待思想政治教育学,有利于将心理学的有关成果应用到思想政治教育工作中,有利于作为交叉学科的思想政治教育心理学向着纵深方向发展,有利于个体进行自我教育并逐步成长为一个全面发展的人。     

坚持科学发展观 促进高校和谐图书馆建设——“以人为本”服务模式创新的视角

强调高校图书馆建设以人为本的价值取向,分析了高校和谐图书馆建设的基本内涵与特征,指出要从管理理念创新、资源布局创新、服务模式创新三个方面入手,转变服务观念,营造优良环境,提供优质服务,健全规章制度,优化设施配置,树立服务品牌,创新读者关系,努力构建高校和谐图书馆。     

Relationships among childhood maltreatment, PTSD, and health in female veterans in primary care

OBJECTIVE: Women with histories of childhood maltreatment (CM) have higher rates of physical health problems and greater medical utilization compared to women without abuse histories. This study examined whether current post-traumatic stress disorder (PTSD) symptoms mediate the relationship between CM and indicators of physical health and medical utilization in female veterans. METHOD: Respondents were 221 female veterans (56% of the potential sample), who received medical care from the San Diego VA Healthcare System during a 12-month period. Respondents provided self-report information about CM, PTSD symptoms, use of pain medication, and physical symptoms and functioning. Additional information about medical utilization was extracted from respondents' medical charts. Regression-based models were conducted to test whether PTSD symptoms mediate the relationships between CM and physical symptoms and between CM and medical utilization. RESULTS: Emotional abuse was associated with poorer role-physical functioning, increased bodily pain and greater odds of using pain medication in the past 6 months. Physical abuse was associated with poorer general health. Contrary to prediction, emotional neglect was associated with better role-physical functioning, and CM was not associated with increased healthcare utilization. PTSD was shown to mediate the relationship between emotional and physical abuse and health outcomes. CONCLUSIONS: PTSD, or psychopathology more generally, appears to be an important factor in the negative health impact of CM. Given that several empirically supported interventions are available for PTSD, there may be physical health benefits in early identification and treatment of psychopathology related to CM.     

至精至细至善的服务--亚马逊B to C物流系统分析

媒体的变迁,必然会推进出版行业的转变和发展.网络媒体的崛起,对于出版界的冲击,必然表现在电子书、网络书店经营方式的变革上.