改进的应用共享概念及实现

为了更好地支持群体协同工作，提出并实现了一个改进的应用共享。首先介绍基于Windows消息函数的传统应用共享所采用的方法及控制机制，然后给出改进的应用共享为更好地支持群体协同工作所采用的方法，包括：改造后的界面能够支持群体中成员的互操作，支持多光标等。     

应用协同与应用共享

应用共享的技术已经较为成熟,并且已有产品提供使用。应用共享技术可以将单用户的应用程序改造为分布式的多用户共享应用程序,但协作者只能串行工作,而且还存在一些问题并未彻底解决,以至于难以实际应用。为了弥补应用共享存在的不足和更好地支持群体协同工作,文章提出了“应用协同”的概念,即把实质上仅支持个体工作的传统软件改造为支持群体协同工作的应用软件,以达到充分利用已有资源的目的。该文首先就应用协同的概念和它应具备的功能进行论述,然后就应用协同与应用共享之间的差异进行比较。     

利用同步复制技术实现协同工作中的数据共享

文章以企业级计算机网络为基础,讨论了在企业中利用复制技术实现数据的共享。并以某矿务局的局—矿计算机网络为基础进行了实现。通过数据库设计和复制技术可简化企业中数据的共享和交流。     

应用共享原理及实现

应用共享已是CSCW应用系统常提供的一个讨论工具，通过它可以将传统的应用软件，改造为能支持多用户共享操作的应用软件，达到充分利用已有资源的目的。主要介绍Windows环境下，应用共享的原理以及实现方法，并对Unix环境下应用共享的实现方法进行探讨。     

协同设计中的冲突消解研究

协同设计中多个人员同时参与设计，由于它对设计的考虑角度，评价标准，领域知识不尽相同，冲突在所难免，文中分析了协同设计过程中冲突的特点，对冲突管理的关键技术进行了研究，提出了一种混合型冲突消解模型。     

协同开发环境中的CAD/CAM集成系统研究

本文探讨了计算机网络技术下的CAD／CAM集成系统．提出了一种协同环境下的CAD／CAM集成系统，并构造了其网络体系结构和其系统的框架结构。     

基于COM＋的协同集成设计环境下用户管理模型

近年来,计算机支持的协同设计(CSCW)已经成为一项热门的研究话题。本文提出了协同设计环境下用户管理的模型,探讨了不同逻辑网络结构,特别是在对等网络结构下,用户动态加入和退出的算法。通过使用COM 技术实现了客户和服务器位置的透明性、角色的划分和用户之间的安全交互等功能。实验结果进一步验证了设计的正确性和有效性。     

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.     

多媒体网络教室中共享白板的协调同步机制研究

该文首先提出了一种计算机支持的协同工作应用系统的基本模型,接着引入了CSCW系统的协作机制和相关的同步方法,最后,将上述介绍的协作机制和同步控制方法应用到多媒体网络教室的电子白板设计中,取得了良好的效果。     

Providing data confidentiality against malicious hosts in Shared Data Spaces

This paper focuses on the protection of the confidentiality of the data space content when Shared Data Spaces are deployed in open, possibly hostile, environments. In previous approaches, the data space content was protected against access from unauthorised application components by means of access control mechanisms. The basic assumption is that the hosts (and their administrators) where the data space is deployed have to be trusted. When such an assumption does not hold, then encryption schemes can be used to protect the data space content from malicious hosts. However, such schemes do not support searching on encrypted data. As a consequence, performing retrieval operations is very expensive in terms of resource consumption. Moreover, in these schemes applications have to share secret keys requiring a very complex key management. In this paper, we present a novel encryption scheme that allows tuple matching on completely encrypted tuples. Since the data space does not need to decrypt tuples to perform the search, tuple confidentiality can be guaranteed even when the data space is deployed on malicious hosts (or an adversary gains access to the host). Our scheme does not require authorised components to share keys for inserting and retrieving tuples. Each authorised component can encrypt, decrypt, and search encrypted tuples without knowing other components’ keys. This is beneficial inasmuch as it simplifies the task of key management. An implementation of an encrypted data space based on this scheme is described and some preliminary performance results are given.     

共享空间的佩戴式计算机与三维CSCW

分析了实现三维CSCW的几种技术，对强化真实性的共享空间技术进行了深入的研究，在此基础上提出了佩戴式计算机的特性，使其成为三维CSCW的理想平台，并且用户在这种环境下表现得比在沉浸式虚拟环境下要好。     

基于代理的流媒体动态共享缓存算法研究*

研究了代理服务器在流媒体传输和缓存方面对于网络带宽的消耗以及在缓存过程中内存分配和管理等方面存在的问题;在分析了现有的流媒体代理缓存技术的基础上,提出了基于代理服务器的流媒体动态共享缓存(DSB)算法.分析和实验结果表明,与现有的缓存技术相比,DSB算法能够有效地提高缓冲区的利用率,节省代理服务器的内存资源,节省网络带宽,同时能够为更多的客户端请求提供服务,并且可以有效地缩短请求延时.     

一种基于黑板的共享对象协同操纵系统

文中提出一个基于黑板的共享对象协同操纵模型，对其中的关键技术黑板结构、共享对象的分布、并发控制、协作感知进行了详细的讨论。     

Creating Shared Information Spaces to Support Collaborative Design Work

The provision of computer support for collaborative work is a central concern for Information Systems (IS) research and practice. In this paper we present the details of an information flow study undertaken in the household division of a large European design and manufacturing company (Delta). The goal of the study was to elicit user requirements for a computer system to facilitate the collaborative work of new product design teams. These requirements form the basis for the design and development of a Web-based LIRÉ (Living Repository) prototype system, the functionalities, features, and rationale of which are discussed. We also present the results of the evaluation of LIRÉ by the users at Delta and our observations on enhancing the sophistication and usefulness of this class of system. A production version based on the prototype but using commercially available software is currently in use by the New Product Development group at Delta.     

支持CSCW的数据库管理技术的研究

文中分析了支持ＣＳＣＷ系统的数据库管理系统应该具备的功能,针对目前ＲＤＢＭＳ占有大部分市场的现实,提出了基于ＲＤＢＭＳ和文件系统相结合的扩展数据库管理系统（ＥＲＤＢＭＳ）的框架,基于这个思想,实现了数据管理构件,文中还介绍了在数据管理构件中如何能有效地管理多媒体数据,动态地描述实体及实体间的复杂关系,支持数据变化的通知,在此基础上可以快速地构造ＣＳＣＷ应用系统。     

On the Expressiveness of Timed Coordination via Shared Dataspaces

Since Linda, many differents coordination models using shared dataspaces have been developped. However, a few only have incorporated the notion of time. This paper builds upon previous work to study the expressive power of two families of timed coordination models based on shared dataspaces. The first one relies on Linda's communication primitives whereas the second relies on the more general notion of multi-set rewriting, incorporated, for instance, in Gamma. We analyse the expressiveness increase provided by the primitives in each of the two families and also compare the expressiveness power of the two families.     

Serviceflow Management

Der Artikel stellt den Begriff Serviceflow-Management zur Diskussion und analysiert die über Workflow-Management hinausgehenden neuen Herausforderungen an eine angemessene IT-Unterstützung.     

网络会议记录的版本管理

网络会议是计算机支持协同工作环境(CSCW)的一个重要应用,是能够克服时空限制的一种会议召开方式。该文对四种会议类型进行了分析,讨论了其各自记录版本的特点,并以多次多会型会议为例,对网络会议记录的多版本性动态性和关联性展开论述。针对这些特点,笔者阐述了会议版本管理的内容,提出一种针对网络会议记录的版本管理模式,还给出了相应的简单实例和界面。     

计算机辅助协同设计中的数据管理研究

提出在计算机辅助协同设计中采用面向对象的思想管理数据的方案，实践证明该方法可以使CAD技术与CSCW技术充分结合，提高协同的效率，充分发挥协同设计的优越性，介绍了该方案的主要思想，以及数据存储、数据查询、并发控制、版本管理、数据恢复等核心技术。     

Aware Community Portals: Shared Information Appliances for Transitional Spaces

People wish to maintain a level of awareness of timely information, including presence of others in the workplace and other social settings. We believe this provides better exchange, coordination and contact within a community, especially as people work in asynchronous times and distributed locations. The challenge is to develop lightweight techniques for awareness, interaction and communication using shared information appliances. In this paper, we describe the design of an exploratory responsive display projected within a shared workspace at the MIT Media Lab. The system uses visual sensing to provide relevant information and constructs traces of people’s activity over time. Such aware portals may be deployed in casual workplace domains, distributed workgroups, and everyday public spaces.