2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing最新文献

{"title":"A policy management framework for trusted crossdomain collaboration","authors":"Zhengping Wu, Hao Wu, Yuanyao Liu","doi":"10.4108/ICST.COLLABORATECOM2009.8318","DOIUrl":"https://doi.org/10.4108/ICST.COLLABORATECOM2009.8318","url":null,"abstract":"Cross-domain collaboration between enterprises needs a trusted execution environment. Policy-based management is a promising and convenient way to construct and manage such an environment. Since management of security and trust policies from collaborating domains has to handle different policies and heterogeneous policy enforcement platforms, an architectural innovation of policy management in this environment is needed. In this paper, a policy management framework is designed and implemented to provide a trusted cross-domain collaboration environment. Merits of this new framework are illustrated through an application in the web services environment.","PeriodicalId":232795,"journal":{"name":"2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123210575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ABTS: A transformation-based consistency control algorithm for wide-area collaborative applications","authors":"Bin Shao, Du Li, Ning Gu","doi":"10.4108/ICST.COLLABORATECOM2009.8271","DOIUrl":"https://doi.org/10.4108/ICST.COLLABORATECOM2009.8271","url":null,"abstract":"Operational transformation (OT) is an established optimistic consistency control method in collaborative applications. Most existing OT algorithms are developed under a well-accepted framework with a condition that cannot be formally proved. In addition, they generally support two character-based primitive operations, insert and delete, in a linear data structure. This paper proposes a novel OT algorithm that addresses the above two challenges as follows: First, it is based on a recent theoretical framework with formal conditions such that its correctness can be proved. Secondly, it supports two string-based primitive operations and handles overlapping and splitting of operations. As a result, this algorithm can be applied in a wide range of practical collaborative applications.","PeriodicalId":232795,"journal":{"name":"2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131327991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An IT appliance for remote collaborative review of mechanisms of injury to children in motor vehicle crashes","authors":"Mahendra Kumar, R. Newman, José Fortes, D. Durbin, F. Winston","doi":"10.4108/ICST.COLLABORATECOM2009.8367","DOIUrl":"https://doi.org/10.4108/ICST.COLLABORATECOM2009.8367","url":null,"abstract":"This paper describes the architecture and implementation of a Java-based appliance for collaborative review of crashes involving injured children in order to determine mechanisms of injury. The multidisciplinary expertise needed for such reviews is not available at any one institution, resulting in the need for remote collaboration, while the sensitive nature of the information requires secure transmission and controlled access of data. The intended users of the appliance are researchers, engineers, medical doctors, government regulators, automobile and restraint manufacturers, insurance company representatives, and others who are interested in understanding the types and causes of injuries to children involved in motor vehicle crashes. The ultimate goal is to devise engineering solutions that prevent similar injuries from occurring in the future. The collaboration appliance (called Telecenter) enables the following activities: (1) the distributed asynchronous collection of digital content needed for each crash case review under a scheme that consistently organizes content across multiple cases; (2) the secure, Web-based remote participation of users in case-review meetings that involve viewing of case-specific content, live communication (written or verbal), multimedia access and sharing (slide presentations/ images), and use of Web resources; and (3) archival and post-review access of case reviews for follow-up activities and other functions (e.g., statistics, search, and networking). The Telecenter design supports audio conferencing, remote delivery and viewing of slide presentations, and other collaboration features also available in commercial and public-domain collaboration middleware products. However, it goes beyond existing solutions by also embedding a specific workflow and content organization suited for traffic injury reviews, supporting spatio-temporal role-based access control, distributed management of content and seamless integration of existing services. The current status and experience from using an early prototype of the Telecenter in actual case reviews are discussed, along with planned extensions to its functionality.","PeriodicalId":232795,"journal":{"name":"2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134536219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A tabletop groupware system for computer-based music composition","authors":"M. Pichiliani, C. Hirata","doi":"10.4108/ICST.COLLABORATECOM2009.8269","DOIUrl":"https://doi.org/10.4108/ICST.COLLABORATECOM2009.8269","url":null,"abstract":"Tabletop can be used in groupware systems in order to both provide a rich interface shared workspaces and support work with co-located and remote users. Tabletop-based groupware systems can allow users to work together over a shared horizontal display. Music composition is an application that can exploit the features of tabletops. However, there is no current tabletop groupware approach that allows remote users to collaborate in music composition. This paper presents a discussion on how to promote collaborative music composition with tabletop groupware in a distributed context. In order to support the discussion, we have built a prototype to simulate instruments and to record the notes played into a modified music editing application. The prototype allows remote users to cooperate by playing music and recording the result of the composition. Potential applications of our prototype include music playing and training, computer aided composition, education, and recreational usage.","PeriodicalId":232795,"journal":{"name":"2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing","volume":"497 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132217756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploiting tags for concept extraction and information integration","authors":"Martha Escobar-Molano, A. Badia, Rafael Alonso","doi":"10.4108/ICST.COLLABORATECOM2009.8330","DOIUrl":"https://doi.org/10.4108/ICST.COLLABORATECOM2009.8330","url":null,"abstract":"The use of tags to annotate content creates an opportunity to explore alternatives to automate the process of extracting semantics from data sources. Semantic information is needed for many complex tasks like Concept Extraction and Information Integration. In order to establish the value of user-generated annotation, this paper presents two experiments on which only user tags are used as input. At the core of semantic extraction is the identification of concepts and relationships that are present in the data. We show, through an experimental study on tagged photographs, how to extract concepts associated with photographs and their relationships. Our experiments demonstrate that supervised machine learning techniques can be used to extract a concept associated with a photograph with an overall precision score of 80%. Our experiments also show that a variation of the Jaccard similarity coefficient on sets of tags can be used to determine equivalence relationships between the concepts associated with these sets.","PeriodicalId":232795,"journal":{"name":"2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134347604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Status messages for the right audience with an ontology-based approach","authors":"M. Stanković, Alexandre Passant, Philippe Laublet","doi":"10.4108/ICST.COLLABORATECOM2009.8371","DOIUrl":"https://doi.org/10.4108/ICST.COLLABORATECOM2009.8371","url":null,"abstract":"In this paper we explore the problems of dedicating status messages to their intended audience on the Web. We present the results of our qualitative user study aimed at revealing the nature of the problem. We then present the existing solutions for directing status messages to their audience and consider their weaknesses. Then, we discuss how Semantic Web technologies can be elegantly used to address the problem and what benefits can be driven from their use. Particularly, we rely on the Online Presence Ontology and a way to semantically describe the intended audience of a status message through the notion of Sharing Space - a group of people bound by a shared property (e.g., a common interest, membership in a certain organization, location, etc.). Apart from ontology extensions, we present a prototype that demonstrates the use of Semantic Web technologies in directing status messages to their intended audiences.","PeriodicalId":232795,"journal":{"name":"2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132882656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An analytical study of GWAP-based geospatial tagging systems","authors":"Ling-Jyh Chen, Yu-Song Syu, Bo-Chun Wang, Wang-Chien Lee","doi":"10.4108/ICST.COLLABORATECOM2009.8322","DOIUrl":"https://doi.org/10.4108/ICST.COLLABORATECOM2009.8322","url":null,"abstract":"Geospatial tagging (geotagging) is an emerging and very promising application that can help users find a wide variety of location-specific information, and facilitate the development of future location-based services. Conventional geotagging systems share some limitations, such as the use of a two-phase operating model and the tendency to tag popular objects with simple contexts. To address these problems, geotagging systems based on the concept of ‘Games with a Purpose’ (GWAP) have been developed recently. In this study, we use analysis to investigate these new systems. Based on our analysis results, we design three metrics to evaluate the system performance, and develop five task assignment algorithms for a GWAP-based system. Using a comprehensive set of simulations under both synthetic and realistic mobility scenarios, we find that the Least-Throughput-First Assignment algorithm (LTFA) is the most effective approach because it can achieve competitive system utility, while its computational complexity remains moderate. We also find that, to improve the system utility, it is better to assign as many tasks as possible in each round. However, because players may feel annoyed if too many tasks are assigned at the same time, it is recommended that multiple tasks be assigned one by one in each round in order to achieve higher system utility.","PeriodicalId":232795,"journal":{"name":"2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128954884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Building a stateful reference monitor with coloured petri nets","authors":"Basel Katt, M. Hafner, Xinwen Zhang","doi":"10.4108/ICST.COLLABORATECOM2009.8375","DOIUrl":"https://doi.org/10.4108/ICST.COLLABORATECOM2009.8375","url":null,"abstract":"The need for collaboration and information sharing has been recently growing dramatically with the convergence of outsourcing and offshoring, the increasing need to cut costs through cooperative agreements between partners as well as competitors, and the rise in the demand for a high-quality healthcare from different healthcare actors. New access control requirements have emerged in these modern collaborative and distributed environments, such as continuous control of resource usage considering temporal and cardinal rules, execution of additional tasks to compensate violation of security policies or enforce obliged actions, and constraints for concurrent access and usage of shared resources. These new requirements stipulate the need for new policy models and advanced enforcement mechanisms. Towards these we aim at developing a formal framework based on Coloured Petri Nets theory for the specification of enforcement mechanisms of a resource-centric reference monitor.","PeriodicalId":232795,"journal":{"name":"2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123475669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards automatic privacy management in Web 2.0 with semantic analysis on annotations","authors":"Nitya Vyas, A. Squicciarini, Chih-Cheng Chang, D. Yao","doi":"10.4108/ICST.COLLABORATECOM2009.8340","DOIUrl":"https://doi.org/10.4108/ICST.COLLABORATECOM2009.8340","url":null,"abstract":"Sharing personal information and documents is pervasive in Web 2.0 environments, which creates the need for properly controlling shared data. Most existing authorization and policy management systems are for organizational use by IT professionals. Average Web users, however, do not have the sophistication to specify and maintain privacy policies for their shared content. In this paper, we aim to utilize personal and social annotations to develop automatic tools for managing content sharing, and demonstrate a new application of social annotations in access control. We use annotation data to predict privacy preferences of users and automatically derive policies for shared content. We carry out a series of user studies to evaluate the accuracy of our predicted techniques. We also perform extensive analysis on static and dynamic approaches of analyzing semantic similarities of tags, which is of independent interest. Our analysis gives encouraging results on the feasibility of using annotations for privacy management in Web 2.0.","PeriodicalId":232795,"journal":{"name":"2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122540566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GColl group-to-group videoconferencing system: design and first experiences","authors":"P. Slovák, Pavel Troubil, P. Holub","doi":"10.4108/ICST.COLLABORATECOM2009.8344","DOIUrl":"https://doi.org/10.4108/ICST.COLLABORATECOM2009.8344","url":null,"abstract":"We present a videoconferencing tool, GColl, which aims to support collaboration among remote groups of participants. GColl supports mutual gaze as well as partial gaze awareness for all participants, while still retaining a modest technical requirements: a camera and an echo-canceling microphone at each site; and a laptop with two USB cameras for each user. The environment is also easily deployed and allows quick changes in numbers of participants at individual sites. It is therefore suitable even for ad-hoc groups or teams with small budgets. A quantitative user study has been conducted in order to evaluate functionality of GColl with promising results. Additionally, the tool is available for download as an open-source project.","PeriodicalId":232795,"journal":{"name":"2009 5th International Conference on Collaborative Computing: Networking, Applications and Worksharing","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127845939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}