一类广义Feistel密码的线性分析

针对一类广义Feistel密码提出一种求取密码线性偏差上界的方法.该分析方法的思路是,首先对密码体制线性偏差进行严格的数学描述,分别给出密码线性偏差与轮函数F及S盒的线性偏差的数学关系;然后确定密码线性偏差的上界.利用该方法给出了 32轮以内各轮的线性偏差上界     

"三农"难题成因:历史嬗变与现实探源

"三农"问题已成为中央政府与社会各界高度关注的社会焦点,"三农"问题能否顺利解决直接影响到中国农业的可持续发展与社会经济的全面进步。本文从历史检索与现实反思有机结合的视角,系统探讨了中国"三农"难题的四大成因,即:市场之因、制度之因、国情之因与政策之因,从而为"三农"难题的有效化解提供了基本的理论前提。     

认知偏误对创业者学习与企业绩效的调节效应

基于闽南的样本数据,运用结构方程分析方法,创业者认知偏误对创业学习与绩效关系的调节效应得到检验。研究结论认为,创业者认知偏误的调节作用主要发生在信息加工、输出与反馈过程中。具体而言,创业加工与输出偏差一般会削弱开发学习与短期绩效之间的关系．从而使得创业者变得更加冒险。信息反馈偏误通过强化探索学习与短期绩效负相关关系,来影响创业决策。     

从WEB2.0看图书馆在高校学科建设中的服务创新

Web2.0是互联网的新生事物.它具有主动参与、自组织、去中心化、社会性、微内容和开放性的特性.Web2.0的应用对图书馆的信息服务产生较大影响.以Blog、Rss、Wiki和Ajax等Web2.0的核心技术运用于图书馆的高校学科建设服务中,搭建良好的、开放的、互动的学术交流平台,将促进知识管理及学科建设的良性发展并有效推送图书馆的信息服务.参考文献11.     

院系资料室为学科建设服务新探索

从特色文献构成、多种载体来源以及网络资源整合等三个方面,探索了美术资料室特色资源建设与学科服务的课题。     

General and Specific Factors in Reading Comprehension

One explanation for why many students routinely choose to do their homework with a radio or TV operating is that this distraction facilitates studying. To investigate the validity of this explanation, the authors carried out two experiments with sixth-grade students who worked on two difficulty levels of individualized mathematics assignments (N = 12) and reading assignments (N = 9) under three distraction conditions: quiet; self-selected, self-regulated radio; and self-selected, self-regulated TV. The data yielded no evidence of sizable distractor effects on students' time spent studying, computational accuracy, reading comprehension, or reading rate. These results generally are consistent with the theoretical conceptualization of attention as flexible and adaptable.     

A cross-cultural investigation of teachers’ and reporting officers’ self-ratings on teaching and leadership skills across Singapore and Bahrain

Self-rating bias is particularly likely in organizational behavior research as individuals tend to inflate their expertise, skills and character. This study aims to examine how two culturally diverse groups of teachers and their reporting officers respond to self-ratings of their own teaching skills and leadership skills respectively. It is posited that such response may be culturally based. To ensure validity of comparisons, analyses were done using linear Rasch measures in logits rather than the non-linear raw scores. No significant differences were found between the perceptions of Singaporean teachers and their reporting officers on teaching and leadership skills. The Bahraini data however revealed teachers’ perceptions of own teaching skills were significantly higher than that of their reporting officers. The opposite is true for the Reporting officers’ perceptions of our leadership skills. Bahraini teachers’ perceptions of their own teaching skills were also found to be significantly higher than that of their Singaporean counterparts. The findings support the notion that individuals’ thinking and behavior is influenced by how they process social and cultural information.     

青少年学生形体认知偏差与自尊、生活满意感的关系

形体认知偏差定义为自我体型认知与实际生理体型产生的差值,差值越大,偏差越大。基于社会认知理论,对青少年学生形体认知偏差与自尊、生活满意感的关系进行探讨与分析。被试者600名大、中学生填写了一般自尊量表、身体自尊量表、生活满意感量表、BMI表。研究结果表明,青少年学生对形体认知偏差在不同体型、年龄和性别之间存在着显著差异。形体认知偏差与身体自尊和一般自尊存在着显著相关关系,主要体现在女生群体中。形体认知偏差能够对身体自尊和一般自尊进行可靠的预测。但无论男、女生,形体认知偏差与生活满意感之间不存在相关关系,即不能对生活满意感产生预测效应。路径分析表明,形体认知偏差对生活满意感的影响是通过身体自尊和一般自尊这两个中间变量间接实现的。     

信息咨询服务——图书馆改革与市场化的突破口

针对图书馆馆员将被"屠杀"这一发展必然,本文提出将信息咨询服务作为突破口,推行图书馆服务的市场化,阐述了学科服务市场化的步骤及其困境,并将人力资源管理机制引入高校图书馆。