微博走进公安工作

微博这种新兴的网络交流方式越来越受到公众的关注,正在成为继博客之后网民们相互交流的新平台,这种集发布信息、互动交流于一体的网络工具也为公安机关所关注,各级公安机关纷纷对公安微博表现出了极大的热情,给新形势下的公安工作带来了新的契机。公安机关开设微博可以带来以下好处:首先,公安微博拉近了警民距离,提高了警察自身的公信力;其次,公安微博能使公安机关站在信息发布的制高点,及时消除谣言,还原真相;最后,公安微博能为侦查提供线索,为破案开辟新思路。总之,公安微博的开辟为公安工作带来了可喜的变化,小小的"微博110"正在为社会的稳定,人民的安居乐业贡献自己的力量。     

综合型实验室建设与教学探索

综合型实验室是高校培养学生创新能力和提高学生综合素质的重要场地。本文从综合型实验室的建设出发,结合实际教学情况,提出从思路、硬件的角度完善实验室建设工作,通过开放和合作来促进教学发展。只有辅以完善的建设体系,采用合理有效的教学方式,才能最终增强教学能效性,培养出具有竞争力的创新型人才。     

基于工作过程导向的“网页设计与制作”课程教学改革研究

本文阐述了基于工作过程的高职网页设计课程的改革思路,运用先进的教学理念,以行动体系为依托,以职业活动为主线。以项目任务驱动为教学形式的"基于工作过程导向"模式对课程教学改革进行了研究与实践。     

Intelligent assistance for teachers in collaborative e-learning environments

Collaborative learning environments provide a set of tools for students acting in groups to interact and accomplish an assigned task. In this kind of systems, students are free to express and communicate with each other, which usually lead to collaboration and communication problems that may require the intervention of a teacher. In this article, we introduce an intelligent agent approach to assist teachers through monitoring participations made by students within a collaborative distance learning environment, detecting conflictive situations in which a teacher’s intervention may be necessary. High precision rates achieved on conflict detection scenarios suggest great potential for the application of the proposed rule-based approach for providing personalized assistance to teachers during the development of group works.     

Measuring individual learning performance in group work from a knowledge integration perspective

Evaluation is an important part of the teaching-learning process, and it becomes more difficult when individuals are developing a joint project and individual marks have to be assigned to the group members. Different strategies can be used to perform this task. In this work, an approach that combines the global group results and the individual performance is presented. This approach makes use of a semantic framework to rank the individual participation of each group member and to compare their results with those they should have obtained to achieve the final mark. An experiment performed in real settings is also reported in this paper.     

带电作业机器人控制系统

带电作业机器人是针对配电线路带电作业而研制开发的一种安全、可靠的带电作业设备. 介绍了带电作业机器人系统组成, 运动控制系统的软硬件实现, 最后详细介绍了系统的位置伺服和力/位置混合控制, 并且通过MATLAB仿真对两种控制方法进行了位置跟踪比较, 仿真曲线证明带有力反馈的控制效果更佳.     

Policy-based Awareness Management (PAM): Case study of a wireless communication system at a hospital

The present paper evaluates the use of software agents to identify relevance of information, called awareness. This evaluation is based on existing policies and scenarios in the context of wireless communication of a hospital in Norway. The study is to address the lack of literature for experimental studies on a method to employ software agents for awareness identification. Research in computer supported cooperative work indicates the significant contributions of software agents to assist individuals. There are bodies of work that show awareness provides the means for software agents in which effective cooperation can take place. In addition, the role of the methods to identify awareness is emphasized in the literature of both computer supported cooperative work and software agents. This paper explains a step-wise process, called Policy-based Awareness Management, which allows agents to use policies as a source to identify awareness and thus change their behaviors accordingly. The contribution of this method is based on the concepts proposed by the logic of general awareness. The present study applies Directory Enabled Networks-next generation as the policy structure for the method. The paper evaluates the process via its application to identify the relevance of information in wireless communication scenarios in a hospital. The present study conducts observations, interviews and discussions on the wireless communication system of the hospital to identify the different scenarios happening in the system. The paper presents a set of simulations on these scenarios and concludes that the method is effective and cost-efficient.     

Evaluation of the effect of a paver’s trolley on productivity, task demands, workload and local discomfort

The objective of this study was to determine the differences in the number of paving stones laid (productivity), task demands, energetic workload, body region discomfort and preference when laying paving stones with or without use of a paver’s trolley (n = 8) in a within-subject controlled study of pavers. The number of paving stones laid and the task demands were measured by means of systematic observations at the workplace. The energetic workload was determined using the percentage of heart rate reserve (%HRR). Body region discomfort was measured using visual analog scales, and the workers’ preference was ascertained via interview. The use of a paver’s trolley had no effect on productivity, %HRR or body region discomfort compared to working without a paver’s trolley. The duration of knee-straining activities did not differ between working with (141 min) and without (146 min) the paver’s trolley. However, six of the eight pavers indicated that, given suitable circumstances, they wanted to use the paver’s trolley.

Relevance to industry

To reduce the chance of work-related low back and knee complaints among pavers, the duration, frequency and intensity of lower back and knee-straining activities should be limited by means of technical measures such as mechanical paving. The paver’s trolley does not appear to reduce knee-straining activities and therefore does not appear useful in reducing the risk of knee complaints and disorders.     

Practices with technology: learning at the boundary between study and work

A study of part‐time student experience of university courses delivered using a range of technologies found that information and communication technology enabled students to move between study and work experience to the benefit of their learning in both contexts. Technology‐based study activities enabled students to participate in learning both as a student and as a member of a practice or work context. Given the increasingly pressured lives of all students in higher education and their aspirations for employment after graduation, this suggests that we would benefit from taking their relationship to work and professional practice into account more directly, in deciding how to integrate technology into their study experience. Teacher conceptions of technology as a tool primarily for information delivery and discussion need to expand to recognize that it can be used to construct learning experiences situated in roles, skills and interactive environments that enhance students' ability to make transitions across the boundaries between contexts of study and work.     

基于任务的访问控制系统

从特点、基本组成、模型系结构以及应用前景这几个方面着手介绍一种新的访问控制模式－基于任务的访问控制（TBAC）,并着重说明了基于任务的访问控制模型与传统的访问控制模型的不同点。