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2006 International Conference on Collaborative Computing: Networking, Applications and Worksharing最新文献

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An Integrated Framework for Trust-Based Access Control for Open Systems 基于信任的开放系统访问控制集成框架
Michael Chuang, S. Phoomvuthisarn, J. Joshi
An important requirement of systems or application domains in emerging open environments is the capability to share information and services with other application domains that have different sets of protection requirements. When a domain needs to allow entities from previously unknown domains to access its resources, mechanisms should be in place to allow negotiating trust and services based on the sharing requirements of the interacting domains. We emphasize that a holistic framework for requirements-driven trust based secure interoperation is needed to facilitate interacting domains to access each other's local resources through access control policy mapping between the domains. In this paper, we present our ongoing work on developing a comprehensive framework for a trust based access control for secure interoperation, which tightly integrates role-based access control and inter-domain policy mapping mechanism with an integrated, game-theory based trust and service negotiation process. The framework being developed aims to address the complex requirements of an environment that represents the convergence of grid, peer-to-peer and mobile environments and workflow and multimedia technologies.
在新兴的开放环境中,系统或应用程序域的一个重要需求是能够与具有不同保护需求集的其他应用程序域共享信息和服务。当一个域需要允许来自以前未知域的实体访问其资源时,应该设置机制,允许基于交互域的共享需求协商信任和服务。我们强调需要一个需求驱动的基于信任的安全互操作的整体框架,以促进相互作用的域通过域之间的访问控制策略映射访问彼此的本地资源。在本文中,我们介绍了我们正在进行的开发基于信任的安全互操作访问控制的综合框架的工作,该框架将基于角色的访问控制和域间策略映射机制与集成的基于博弈论的信任和服务协商过程紧密集成。正在开发的框架旨在解决环境的复杂需求,该环境代表网格、点对点和移动环境以及工作流和多媒体技术的融合。
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引用次数: 7
Data Mediation Support for Triple Space Computing 三空间计算的数据中介支持
M. O. Shafiq, F. Scharffe, Reto Krummenacher, Ying Ding, D. Fensel
Triple space computing is an emerging technology for communication and coordination of different semantic technologies. It has been achieved by extending tuple space computing to support RDF as triple space computing. It can play an important role by acting as global middleware providing support for collaboration of different semantic technologies. Several participants from semantic Web and semantic Web services applications, distributed worldwide communicate with each other via triple space due to which the possibility of heterogeneity in the RDF schemas and instances among the communicating participants may arise. In order to resolve this heterogeneity issue, data mediation becomes an important part of the triple space computing architecture. In this paper we introduce data mediation support for triple space computing and further explain how mismatches occur in RDF data, presents an abstract mapping language to specify mapping to cover the heterogeneity, defines architecture of the mediation engine and its interfaces, processing of mediation mapping rules, grounding of mediation rules as RDF triples and finally evaluates with examples
三空间计算是不同语义技术之间的通信和协调的一种新兴技术。它是通过扩展元组空间计算来支持RDF作为三重空间计算来实现的。它可以充当全局中间件,为不同语义技术的协作提供支持,从而发挥重要作用。来自分布在世界各地的语义Web和语义Web服务应用程序的几个参与者通过三重空间相互通信,因此可能会出现通信参与者之间RDF模式和实例的异构性。为了解决这种异构性问题,数据中介成为三重空间计算体系结构的重要组成部分。本文介绍了对三重空间计算的数据中介支持,并进一步解释了不匹配是如何在RDF数据中发生的,提出了一种抽象映射语言来指定映射以覆盖异构性,定义了中介引擎及其接口的体系结构,中介映射规则的处理,中介规则作为RDF三元组的基础,最后用实例进行了计算
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引用次数: 4
Increasing Awareness in Collaborative Authoring through Edit Profiling 通过编辑分析提高协作创作的意识
S. Papadopoulou, C. Ignat, G. Oster, M. Norrie
Awareness of the activities of other users and also document evolution is an important part of collaborative authoring. We introduce the concept of an editing profile that can be used to maintain and visualise measures of the changes made across a document by different users in both synchronous and asynchronous collaborative editing. It provides a simple means of making users aware of ¿hot areas¿ and also who is or has been active in various parts of the document, as well as a quick access point into parts of the document that have been changed. The profile can be adapted to display the most relevant information based on both user preference and situation.
了解其他用户的活动以及文档的演变是协作创作的重要组成部分。我们介绍了编辑配置文件的概念,它可用于维护和可视化不同用户在同步和异步协作编辑中跨文档所做的更改的度量。它提供了一种简单的方法,让用户了解“热点区域”,以及谁在文档的各个部分活跃,以及快速访问已更改的文档部分。该配置文件可以根据用户偏好和情况进行调整,以显示最相关的信息。
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引用次数: 30
Synchronous Collaborative Information Retrieval with Relevance Feedback 基于关联反馈的同步协同信息检索
Colum Foley, A. Smeaton, Hyowon Lee
Collaboration has been identified as an important aspect in information seeking. People meet to discuss and share ideas and through this interaction an information need is quite often identified. However the process of resolving this information need, through interacting with a search engine and performing a search task, is still an individual activity. We propose an environment which allows users to collaborate to satisfy a shared information need. We discuss ways to divide the search task amongst collaborators and propose the use of relevance feedback, a common information retrieval process, to enable the transfer of knowledge across collaborators during a search session. We describe the process by which co-searchers can collaborate effectively with little redundancy and how we can combine relevance judgements from multiple searchers into a coherent model for synchronous collaborative information retrieval
协作已被确定为信息查找的一个重要方面。人们聚在一起讨论和分享想法,通过这种互动,通常可以确定信息需求。然而,通过与搜索引擎交互并执行搜索任务来解决这种信息需求的过程仍然是一个单独的活动。我们提出了一个允许用户协作以满足共享信息需求的环境。我们讨论了在协作者之间划分搜索任务的方法,并建议使用相关反馈(一种常见的信息检索过程)来实现在搜索会话期间跨协作者的知识转移。我们描述了协同搜索者在少冗余的情况下有效协作的过程,以及如何将来自多个搜索者的相关判断组合成一个同步协同信息检索的连贯模型
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引用次数: 11
WORKPAD: 2-Layered Peer-to-Peer for Emergency Management through Adaptive Processes 基于自适应过程的2层对等应急管理
T. Catarci, F. Rosa, M. Leoni, Massimo Mecella, M. Angelaccio, S. Dustdar, Begoña Gonzalvez, G. Iiritano, A. Krek, G. Vetere, Zdenek M. Zalis
In this paper, we present a recently funded European research project, namely WORKPAD, that aims at designing and developing an innovative software infrastructure (software, models, services, etc.) for supporting collaborative work of human operators in emergency/disaster scenarios. In such scenarios, different teams, belonging to different organizations, need to collaborate with one other to reach a common goal; each team member is equipped with handheld devices (PDAs) and communication technologies, and should carry on specific tasks. In such a case we can consider the whole team as carrying on a process, and the different teams (of the different organizations) collaborate through the "interleaving" of all the different processes (macro-process). Each team is supported by some back-end centre, and the different centres need to cooperate at an inter-organizational level to reach an effective coordination among teams. The project investigates a 2-level framework for such scenarios: a back-end peer-to-peer community, providing advanced services requiring high computational power, data & knowledge & content integration, and a set of front-end peer-to-peer communities, that provide services to human workers, mainly by adaptively enacting processes on mobile ad-hoc networks
在本文中,我们介绍了最近资助的一个欧洲研究项目,即WORKPAD,旨在设计和开发创新的软件基础设施(软件、模型、服务等),以支持紧急/灾难场景下人类操作员的协同工作。在这种情况下,属于不同组织的不同团队需要相互协作以达到共同目标;每个团队成员都配备了手持设备(pda)和通信技术,并应执行特定的任务。在这种情况下,我们可以将整个团队视为执行一个过程,而不同的团队(来自不同组织)通过所有不同过程(宏观过程)的“交织”进行协作。每个团队由某个后端中心提供支持,不同的中心需要在组织间进行合作,以实现团队之间的有效协调。该项目针对这些场景研究了一个两级框架:一个后端点对点社区,提供需要高计算能力、数据、知识和内容集成的高级服务;一组前端点对点社区,主要通过在移动自组织网络上自适应地制定流程,向人类工作者提供服务
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引用次数: 14
Tombstone Transformation Functions for Ensuring Consistency in Collaborative Editing Systems 确保协同编辑系统一致性的墓碑转换功能
G. Oster, P. Molli, Pascal Urso, Abdessamad Imine
In collaborative editing, consistency maintenance of the copies of shared data is a critical issue. In the last decade, operational transformation (OT) approach revealed as a suitable mechanism for maintaining consistency. Unfortunately, none of the published propositions relying on this approach are able to satisfy the mandatory correctness properties TP1 and TP2 defined in the Ressel's framework. This paper addresses this correctness issue by proposing a new way to model shared state by retaining tombstones when elements are removed. An instantiation of the proposed model for a linear data structure and the related transformation functions are provided
在协同编辑中,共享数据副本的一致性维护是一个关键问题。在过去的十年中,操作转换(OT)方法作为一种维护一致性的合适机制被揭示出来。不幸的是,依靠这种方法发布的命题都不能满足Ressel框架中定义的强制性正确性属性TP1和TP2。本文提出了一种新的方法,通过在删除元素时保留墓碑来建模共享状态,从而解决了这个正确性问题。给出了线性数据结构模型的实例和相关的转换函数
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引用次数: 96
Joint Degrees in E-Learning Systems: A Web Services Approach 电子学习系统联合学位:网络服务方法
S. Aguirre, J. Salvachúa, J. Quemada, A. Fumero, A. Tapiador
In order to allow the development of joint degrees through heterogeneous e-learning systems, we propose a federation services architecture whose implementation will be based on Web services. Our main objective is to allow e-learning systems to be able to work in a collaborative way; combining their data and functionality through the integration of their services. These services will be combined and federated, according to collaboration agreements between Universities. Joint degrees through e-learning systems will allow the development of new joint curricula and the participation in the convergence of higher education
为了允许通过异构电子学习系统开发联合学位,我们提出了一个联邦服务体系结构,其实现将基于Web服务。我们的主要目标是让电子学习系统能够以协作的方式工作;通过集成他们的服务来组合他们的数据和功能。根据大学之间的合作协议,这些服务将被合并和联合。通过电子学习系统的联合学位将允许开发新的联合课程,并参与高等教育的融合
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引用次数: 7
Supporting Ad-hoc Collaboration with Group-based RBAC Model 支持基于组的RBAC模型的特别协作
Qi Li, Xinwen Zhang, S. Qing, Mingwei Xu
With the increasing accessibility of information and data, role-based access control (RBAC) has become a popular technique for security and privacy purposes. However, trusted collaboration between different groups in large corporate Intranets is still an unresolved problem. The challenge is how to extend existing access control model for efficient security management and administration to allow trusted collaboration between different groups. In this paper, we propose a group-based RBAC model (GB-RBAC) for this purpose. In particular, virtual group is proposed in our model to allow secure information and resource sharing in multi-group collaboration environments. All the members of a virtual group build trust relation between themselves and are authorized to join the collaborative work. The scheme and strategies provided in this paper meet the requirements of security, autonomy, and privacy for collaborations. As a result, our scheme provides an easy way to employ RBAC policies to secure ad-hoc collaboration
随着信息和数据的可访问性越来越高,基于角色的访问控制(RBAC)已成为一种用于安全和隐私目的的流行技术。然而,大型企业内部网中不同组之间的可信协作仍然是一个未解决的问题。挑战在于如何扩展现有的访问控制模型,以实现有效的安全管理和管理,从而允许不同组之间的可信协作。为此,我们提出了一种基于组的RBAC模型(GB-RBAC)。特别地,我们的模型中提出了虚拟组,以便在多组协作环境中实现信息和资源的安全共享。虚拟组的所有成员之间建立信任关系,并被授权加入协同工作。本文提出的方案和策略满足协作的安全性、自主性和隐私性要求。因此,我们的方案提供了一种使用RBAC策略来保护临时协作的简单方法
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引用次数: 10
How to Fit In Another Meeting 如何参加另一场会议
R. Klein, D. Nussbaum, J. Sack, Jiehua Yi
We are studying the problem of determining suitable meeting times and locations for a group of participants wishing to schedule a new meeting subject to already scheduled meetings possibly held at a number of different locations. Each participant must be able to reach the new meeting location, attend for the entire duration, and reach the next meeting location on time. In particular, we give a solution to the problem instance where each participant has two scheduled meetings separated by a free time interval. For a geometric model, where n participants can travel along straight paths in the Euclidean plane, we present an O(n log n) algorithm to determine the longest meeting duration and a location suitable to all participants. In a graph-based model, transportation is provided by a geometric network over m nodes and e edges in the plane. Participants can have individual weights. Moreover, there can be k groups of participants, such that only one member of each group must attend the meeting. In this model, a location for a meeting of longest possible duration can be determined in time O(enalpha(k) log k + n log n + mn log m), where alpha(k) denotes the extremely slowly growing inverse Ackermann function
我们正在研究为一组与会者确定合适的会议时间和地点的问题,这些与会者希望安排一次新的会议,但不包括可能在若干不同地点举行的已安排的会议。每个与会者必须能够到达新的会议地点,参加整个会议期间,并按时到达下一个会议地点。特别地,我们给出了一个问题实例的解决方案,其中每个参与者都有两个由空闲时间间隔分开的预定会议。对于一个几何模型,其中n个参与者可以沿着欧几里得平面上的直线路径行进,我们提出了一个O(n log n)算法来确定最长的会议持续时间和适合所有参与者的位置。在基于图的模型中,运输是由平面上m个节点和e条边的几何网络提供的。参与者可以有个人的体重。此外,可以有k组参与者,这样每个组中只有一名成员必须参加会议。在该模型中,可以在O(enalpha(k) log k + n log n + mn log m)时间内确定可能持续时间最长的会议地点,其中alpha(k)表示极其缓慢增长的逆Ackermann函数
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引用次数: 3
A Framework for Inter-referential Awareness in Collaborative Environments 协作环境中相互参照意识的框架
J. Chastine, Ying Zhu, J. Preston
For collaborative environments to be successful, a fundamental requirement is that they provide support for inter-referential awareness - or the ability for one participant to refer to a set of objects, and for that reference to be understood by others. Participants in co-located collaboration benefit from the availability of non-verbal communication, including gestures, eye gaze and body movements. However, when geographically separated, they can experience difficulty in communicating - as computer-mediated cues are often compromised. Given the heterogeneity of media and myriad of interaction techniques that exist in groupware, supporting inter-referential awareness can be difficult. We present a unified and systematic way of encapsulating the numerous factors related to this form of awareness through the creation of process-driven ontology. Our framework provides a formal method for describing inter-referential awareness, and serves as approach that interface designers can use to better comprehend the relevant factors involved. This research stems from our previous investigations in inter-referential awareness in collaborative augmented reality environments
协作环境要想取得成功,一个基本的要求是它们为相互参照意识提供支持——或者一个参与者引用一组对象的能力,并使该引用被其他人理解。同一地点协作的参与者受益于非语言交流的可用性,包括手势、目光和身体动作。然而,当地理位置分开时,他们可能会遇到沟通困难——因为计算机媒介的线索经常受到损害。鉴于媒体的异质性和群件中存在的无数交互技术,支持相互参照意识可能很困难。我们提出了一种统一和系统的方法,通过创建过程驱动的本体来封装与这种形式的意识相关的众多因素。我们的框架提供了一种描述相互参照意识的形式化方法,并作为界面设计师可以用来更好地理解相关因素的方法。本研究源于我们之前对协作增强现实环境中相互参照意识的研究
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引用次数: 16
期刊
2006 International Conference on Collaborative Computing: Networking, Applications and Worksharing
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