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.     

A methodology to develop awareness in computer supported collaborative work using policies

Cooperation is significantly influenced by participants' awareness of relevant information. The objective of this paper is to propose a methodology to design and develop applications that assist individuals to identify their awareness. Through extending Cooperative management Methodology for Enterprise Networks (CoMEN), this article introduces Policy-based Awareness Management (PAM) – a software engineering methodology that proposes the use of existing policy rules as a source to identify awareness. The methodology has been built on the logic of general awareness, and implements Directory Enabled Networks (DEN) policy structure. The contribution of the paper is illustrated through the wireless communication system at a hospital in Norway. We conclude that theory of general awareness and in particular PAM as an extension of CoMEN, is effective to identify relevant information for agents.     

计算机支持的协同绘制技术论述

随着网络技术和分布式系统的发展,计算机支持的协同工作是在信息时代发展起来的一门新兴学科。文章论述了计算机支持的协同工作技术,分析了常用三种体系结构,探讨在协同绘制中图形对象的一致性技术,并提出一种协同绘制系统的架构。     

一个虚拟教室的协同感知技术

协同感知技术近来成为CSCW和CSCL的一个新的研究领域，它足一个先进的人机接口技术。该文介绍了一个在虚拟教室中实现的协同感知代理的框架结构以及这个协同感知代理的工作过程，在该协同感知过程中实现了对感知信息的灵活过滤，提高了协同感知的效率。     

计算机协同工作技术

本文介绍了在人类社会信息化发展的大背景下，由通信技术与计算机及其网络技术相融合而发展起来的计算机协同工作（ＣＳＣＷ，ＣｏｍｐｕｔｅｒＳｕｐｐｏｒｔｅｄＣｏｏｐｅｒａｔｉｖｅＷｏｒｋ）技术的发展背景、基本概念及广泛的应用领域，并分析了计算机协同工作系统的关键技术；指出计算机协同工作技术是计算机网络技术发展的重要方向，必将带来人们协作方式的发展和协作效率的提高，并推动人类社会信息化进程。     

计算机支持协同式水平井设计系统

运用计算机支持协同工作的最新技术，面向石油钻井中水平井设计过程，研究开发了基于CSCW的协同式水平井设计软件系统，建立由计算机网络支持的多智能体水平井协作设计软件应用平台环境，利用网络通信和移动计算技术来实现动态水平井设计信息的多方传输和并行设计。     

基于云计算的协同技术创新平台

以云计算及协同概念为理论基础,提出了Web环境下基于云计算的协同技术创新平台。讨论如何把HDFS分布式文件系统、计算机支持的协同工作和Agent模式应用到技术创新平台中,重点阐述了技术仓库服务云和校企联盟模块的工作模式及流程,并给出了详细的系统实施效果,对技术创新平台的发展具有重要的价值和意义。     

计算机支持的协同教学系统研究

首先分析了计算机支持的协同教学的基本模式,然后给出了一个计算机支持的协同教学系统的总体设计,最后探讨了实现中的一些关键技术。实现了把Agent和计算机支持的协同工作技术应用于远程教学系统中。     

面向高速混杂网络的被动式多维度主机指纹模型

主机识别对于计算机网络犯罪取证、抵御匿名攻击具有重要意义.为了精确识别网络上的目标主机,首先给出了多维度主机指纹模型的定义和性质并进行了形式化描述,然后针对传统方法在主机指纹获取中存在可靠性及准确性不足的问题,综合主机硬件特征信息、主机软件环境特征信息和主机网络行为特征信息,提出了一种面向高速混杂网络流量的多维度主机指纹模型构建方法.实验结果表明,该模型在高速混杂网络下可以灵活有效提取主机特征信息,使用该模型构建多维度主机指纹模型,主机识别准确率达到93.33%,相比单维度主机指纹识别提高了近8个百分点,具有更高的可靠性和准确率,且不受IP地址变化的影响.     

一个基于CSCW的协同式计算机辅助设计系统

文中首先建立了一个CSCW系统的基本模型;然后详细介绍了一个基于复制式应用程序共享方式技术的协同式计算机辅助设计系统－CoopCAD的系统结构和关键技术,最后,给出了一个使用CoopCAD系统进行协同设计的例子。     

基于CSCW的CAD系统协作支持技术与支持工具的研究

计算机支持的协同工作（CSCW）给CAD技术带来重大发展，但仍然存在许多问题。其中之一是缺乏将协作性能同应用功能有机结合的方法。文中在分析的现有协作支持技术，工具和系统不足的基础上，提出了用协作支持工具软件CoCADToolAgent改造商品化CAD系统来开发CSCD系统的新思路和总体技术路线，给出了通讯支持，协议，一致性维护和并发控制，协同感知，任务和脚色机制的有效的实现方法，作为本方法的一个应用实例，成功地将传统的人机交互式CAD系统AutoCAD转变为网络环境下支持人人交互的CSCD原型系统，作为专用协作支持工具，CoCADToolAgent比NetMeeting之类的通用协作支持工具具有更好的协作性能，该方法可推广到三维CAD系统。     

A survey of CSCW systems

Over the last decade, computer supported cooperative work (CSCW) has emerged as an identifiable research area that focuses on the role of the computer in group work. CSCW is a generic term which combines the understanding of the nature of group working with the enabling technologies of computer networking, systems support and applications. The paper examines the classes of system which have emerged to support cooperative working. A framework for characterising and describing CSCW systems is presented and four major classes of cooperative system identified. Each of these classes of cooperative system are examined highlighting their general characteristics and applicability to CSCW.     

协同式钻具组合辅助设计系统的研究

分析了网络环境下石油钻具组合设计的特点,针对目前钻具组合设计集成软件系统在处理复杂动态的、跨地区部门的钻具组合设计人员群体协作工作时,缺乏足够的协同性和临场感,运用计算机支持协同工作的最新技术,面向石油钻井中钻具组合设计过程,研究开发基于CSCW的协同式钻具组合辅助设计软件系统,建立由计算机网络支持的多智能体钻具组合协作设计软件应用平台环境,利用网络通信和移动计算技术来实现动态钻具组合设计信息的多方传输和并行设计.     

一个CSCW系统的设计与实现

随着计算机网络技术的发展,计算机支持的协同工作（CSCW）系统正逐渐成为人们研究的热点,协同式计算机辅助设计系统是一类典型的CSCW系统。本文在介绍了CSCW的基本概念之后,从系统组成的角度出发,提出了一个典型的CSCW系统是由应用子系统、信息共享平台、协同工作平台、协作管理平台、以及网络传输平台这五大部分组成的,并对其各部分的内容进行了形式化的描述和系统的分析,最后以我们开发的协同式计算机辅助设计系统－－CoopCAD为例,介绍了如何按照该结构实现一个具有实时性的协同式计算机辅助设计系统。     

基于CSCW技术的多媒体网络教学系统的设计

介绍了计算机支持的CSCW协同工作技术在多媒体网络教学系统中的重要作用,并利用该技术设计一种模型,该模型可以实现多媒体网络教学的人机互交功能。     

基于IP组播的告知服务器的以太网实现

同步协作是计算机支持的协同工作研究的一个重要领域,告知服务器为群组的同步协作提供了感知的实现技术,告知服务要求有效地向群组用户投递事件消息。ＩＰ组播技术是 服务 通讯技术,被广泛用于视音频群组通信,但目前许多告知服务器实现仍然采用点对 通信技术,在多媒体远程协作系统中,直接利用ＩＰ组播技术实现了可靠的告知服务,并初步分析了ＩＰ组播在以太网络上的实现方式和实现可靠笥的条件。     

Modelling Shared Contexts in Cooperative Environments: Concept, Implementation, and Evaluation

Users who work together require adequate information about their cooperative environment: about other group members presence and activities, about shared artefacts, etc. In the CSCW literature several concepts, prototypes, and systems for providing this group awareness information have been presented. In general, they capture information from the environment, process it, and present it to the users. This paper addresses the processing aspect; in particular, we present a concept for processing awareness information by means of awareness contexts. With this concept we address the problem of contextualising event notifications enabling the presentation of notifications in the appropriate user situation. We describe a lightweight model and its integration into an event and notification infrastructure. We report on an empirical study, and draw some conclusions for the design of context-awareness for cooperative environments.     

基于Internet的软件协同开发系统设计与实现

基于Internet的软件协同开发是一种计算机支持的协同工作,介绍了利用Winsock2技术设计和实现基于Internet的软件协同开发系统,它是为了在Internet上建立协同开发软件的集成功能环境,方便群体讨论、远程存取文件和远程调试程序,便于对整个开发过程实施监控,提高软件开发效率。     

Modelling Shared Contexts in Cooperative Environments: Concept,Implementation, and Evaluation

Users who work together require adequate information about their cooperative environment: about other group members presence and activities, about shared artefacts, etc. In the CSCW literature several concepts, prototypes, and systems for providing this group awareness information have been presented. In general, they capture information from the environment, process it, and present it to the users. This paper addresses the processing aspect; in particular, we present a concept for processing awareness information by means of awareness contexts. With this concept we address the problem of contextualising event notifications enabling the presentation of notifications in the appropriate user situation. We describe a lightweight model and its integration into an event and notification infrastructure. We report on an empirical study, and draw some conclusions for the design of context-awareness for cooperative environments.