Computer-supported cooperative work and groupware: an introduction to the special issues

Greenberg, Saul

doi:10.1016/0020-7373(91)90038-9

Cited by 62 publications

(20 citation statements)

References 10 publications

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“…Real-time distributed groupware allows people to work together at the same time from different places (e.g., Baecker [1993] and Greenberg [1991]). Many of these systems provide shared computational workspacestwo-dimensional areas akin to whiteboards or tabletops-where people can create and manipulate task artifacts.…”

Section: Introductionmentioning

confidence: 99%

The effects of workspace awareness support on the usability of real-time distributed groupware

Gutwin

Greenberg

1999

ACM Trans. Comput.-Hum. Interact.

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Real-time collaboration in current distributed groupware workspaces is often an awkward and clumsy process. We hypothesize that better support for workspace awareness-the understanding of who is in the workspace, where they are working, and what they are doing-can improve the usability of these shared computational workspaces. We conducted an experiment that compared people's performance on two versions of a groupware interface. The interfaces used workspace miniatures to provide different levels of support for workspace awareness. The basic miniature showed information only about the local user, and the enhanced miniature showed the location and activity of other people in the workspace as well. We examined five aspects of groupware usability: task completion times, communication efficiency, the participants' perceived-effort, overall preference, and strategy use. In two of three task types tested, completion times were lower in the awareness-enhanced system, and in one task type, communication was more efficient. The additional awareness information also allowed people to use different and more effective strategies to complete the tasks. Participants greatly preferred the awareness-enhanced system. The study provides empirical evidence that support for workspace awareness improves the usability of groupware, and uncovers some of the reasons underlying this improvement.

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Section: Introductionmentioning

confidence: 99%

The effects of workspace awareness support on the usability of real-time distributed groupware

Gutwin

Greenberg

1999

ACM Trans. Comput.-Hum. Interact.

Self Cite

202

137

View full text Add to dashboard Cite

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“…Several other areas of research have looked at complementary aspects of the problems that we aim to address. Research on architectures and systems for Computer-Supported Cooperative Work include a variety of information management and communication technologies that facilitate collaboration within human organizations (Greenberg 1991;Malone et al 1997). In contrast with our work, they do not have agents associated with people that have some degree of autonomy and can make decisions on a human's behalf.…”

Section: Related Workmentioning

confidence: 96%

Electric Elves: Agent Technology for Supporting Human Organizations

Chalupsky¹,

Gil²,

Knoblock³

et al. 2002

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The operation of a human organization requires dozens of everyday tasks to ensure coherence in organizational activities, to monitor the status of such activities, to gather information relevant to the organization, to keep everyone in the organization informed, etc. Teams of software agents can aid humans in accomplishing these tasks, facilitating the organization's coherent functioning and rapid response to crises, while reducing the burden on humans. Based on this vision, this paper reports on Electric Elves, a system that has been operational, 24/7, at our research institute since June 1, 2000. Tied to individual user workstations, fax machines, voice, mobile devices such as cell phones and palm pilots, Electric Elves has assisted us in routine tasks, such as rescheduling meetings, selecting presenters for research meetings, tracking people's locations, organizing lunch meetings, etc. We discuss the underlying AI technologies that led to the success of Electric Elves, including technologies devoted to agenthuman interactions, agent coordination, accessing multiple heterogeneous information sources, dynamic assignment of organizational tasks, and deriving information about organization members. We also report the results of deploying Electric Elves in our own research organization.

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“…All With the increasing interest in agent cooperation, several cooperative systems have been developed; for example, groupwares (Greenberg, 1991) of CSCW such as videoconferencing software or multi-agent-based cooperation systems such as Gaia (Zambonelli et al, 2003) and SuperSpace (Roman and Campbell, 2000). For practical use of these systems, it is necessary to apply an appropriate security model.…”

Section: Related Workmentioning

confidence: 99%

CRiBAC: Community-centric role interaction based access control model

Jung

Joshi

2012

Computers & Security

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Access control RBAC Community computingMulti-agent system a b s t r a c tAs one of the most efficient solutions to complex and large-scale problems, multi-agent cooperation has been in the limelight for the past few decades. Recently, many research projects have focused on context-aware cooperation to dynamically provide complex services. As cooperation in the multi-agent systems (MASs) becomes more common, guaranteeing the security of such cooperation takes on even greater importance. However, existing security models do not reflect the agents' unique features, including cooperation and context-awareness. In this paper, we propose a Community-based Role interactionbased Access Control model (CRiBAC) to allow secure cooperation in MASs. To do this, we refine and extend our preliminary RiBAC model, which was proposed earlier to support secure interactions among agents, by introducing a new concept of interaction permission, and then extend it to CRiBAC to support community-based cooperation among agents. We analyze potential problems related to interaction permissions and propose two approaches to address them. We also propose an administration model to facilitate administration of CRiBAC policies. Finally, we present the implementation of a prototype system based on a sample scenario to assess the proposed work and show its feasibility. ª 2012 Elsevier Ltd. All rights reserved. IntroductionThe rapid growth of networking technologies has significantly promoted the level of connectivity and interaction among distributed computing elements. Particularly, multiagent systems (MASs) that feature rich interactions among agents have become a very active area of research. The rich interactions among agents promote seamless cooperation that has potential to address large and complicated problems which cannot be solved by an individual agent. Such benefits have been the key reasons that many researchers have been studying cooperation approaches for decades in many areas such as swarm intelligence, MAS, and Computer Supported Cooperative Work (CSCW). Several MASs that provide services through cooperation among agents have been proposed in the literature, including, Gaia (Zambonelli et al., 2003), Pervasive Information Community Organization (PICO) (Kumar et al., 2003), and Community Computing (Jung and Kim, 2010). Unlike cooperation in other areas, dynamic cooperation in MASs has been regarded as a critical issue due to the agent's autonomous and dynamic characteristics. Current MASs support the context-awareness necessary for dynamic cooperation to some degree (Zambonelli et al., 2003;Kumar et al., 2003;Jung and Kim, 2010); however, these systems pose significant adoption challenges because of security concerns. c o m p u t e r s & s e c u r i t y 3 1 ( 2 0 1 2 ) 4 9 7 e5 2 30167-4048/$ e see front matter ª

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Computer-supported cooperative work and groupware: an introduction to the special issues

Cited by 62 publications

References 10 publications

The effects of workspace awareness support on the usability of real-time distributed groupware

The effects of workspace awareness support on the usability of real-time distributed groupware

Electric Elves: Agent Technology for Supporting Human Organizations

CRiBAC: Community-centric role interaction based access control model

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