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The following topics are dealt with: CSCW; cooperative design; knowledge management; user modeling; intelligent agents; multi-agent systems; Web services; semantic Web; mobile collaboration; VR technologies; distance learning; distance education and virtual enterprises.
Over the years we have seen a shift from mainframe computing, to personal computing, to a world heavily dominated by Web interactions. Users today have access to a wide variety of devices and advances in social computing now enable users to keep in touch with colleagues, friends, and family all over the world; however, we are still limited by the one-user/one-computer origins of PC technology. Whether...
There are a number of important societal problems that resist conventional, i.e., centralized, solutions. The problems affect the management of our economic systems, climate, energy systems, transportation systems, telecommunication systems, and infrastructure. They are characterized as being distributed and many-faceted, with a large number of interdependent components. For example, the routes of...
Institutions, large and small, are increasingly using Internet infrastructure, services and applications to decentralize staff and operations, evolving from a closed to an open house, networked environment, where more and more informal knowledge needs to be shared and managed. At the same time, with a very large percentage of corporate processes being formally supported by information systems, there...
Collaborative editing systems often use communication channels in order to make the collaboration more effective. In this work, we present a case study of pair communication using audio via VoIP (Voice over Internet Protocol) technology during collaborative modeling sessions. The study provides an analysis of audio and textual chat as communication medium and presents data on usage patterns, user...
This paper presents a distributed data management strategy for collaborative design, which supports the data exchange pattern based on any fine-grained data as well as that based on traditional file service. Data are represented using XML and their exchange is achieved through the publishing and subscription mechanism among individual participants. It is also shown in this paper that how the data...
One of the most important aspects of groupware systems is the concept of awareness, which refers to the perception and knowledge of the group and its activities. This paper extends a previously developed ontology-based conceptualization for the development of user interfaces in groupware systems that support awareness. Specifically, we are interested in domain-independent design groupware. We propose...
A new scheme of test data compression, namely equal-run-length coding (ERLC) scheme is presented, which is based on run-length. It first considers both types of runs of 0's and 1's, then it further explores the relationship between two consecutive runs on the basis of the traditional characteristic of run coding which uses shorter codeword to represent longer symbol (run-length). This scheme uses...
Role is an important concept in collaboration systems and CSCW systems especially in the aspect of group awareness. This paper proposes a new group awareness model based on role by the research of role in collaboration systems and the analysis of existing awareness models. In the new proposed model, the task is decomposed into activities in order to acquire the activity graph. Then the roles are extracted...
Constraints conflict occurs inevitably in collaborative design process. Therefore, conflict detection and resolution becomes critical for successfully completing the design. This paper puts forward a novel process of constraints conflict visualization to help designers to solve the problem. The process begins with modeling of constraint information based on constraints satisfaction problem (CSP),...
A role based hierarchical group awareness model (RHGAM) on the basis of the previous research was presented in this paper. Regarding role as the basis of the group cooperation, firstly RHGAM constructed a group cooperation environment (GCE), and then GCE was extended by group awareness content, awareness hierarchy, the task decomposition rule. The model divided the awareness information into four...
Collaborative simulation has become an important process of complex product development and works as a key technology to improve product dynamic characteristics and synthetic performances. This paper firstly introduces a model description of collaborative simulation, and gives a systematic analysis on all kinds of factors which affect performance of algorithm including speed, precision and convergence,...
Now-a-days, with the wide availability of Internet access, a great diffusion of the decision-making in large groups concepts and practices is happening, with many softwares to support it and many people eager to participate and actually collaborating arising. However, these ideas are not exactly new. In the middle of the 5th-4th century BC, some Greek city-states, like Athens, already had a political...
A multi-stage, multi-product, multi-constraint, and mixed continuous/batch plants planning problem is abstracted from production of diaphragm caustic soda, and the problem is formulated as a mathematic optimization model based on the objective to maximize the total profit with constraints involved resources, work manufacture processes and production capacity etc. An approach based on particle swarm...
Constrained random simulation methodology still plays an important role in hardware verification due to the limited scalability of formal verification, especially for the large and complex design in industry. There are two aspects to measure the stimulus generator which are the quality of the stimulus generated and the efficiency of the generator. In this paper, we propose a self-tuning method to...
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