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COMPUTER NETWORKS-thE international JOURNAL OF COMPUTER AND TELECOMMUNICATIONS networking 2000年第1-6期33卷 593-+页

作者： Spreitzer, M Janssen, B Xerox Corp Palo Alto Res Ctr Palo Alto CA 94304 USA

We report on the results of the Protocol Design Group of the W3C9;s HTTP 9;Next Generation9; Activity. the group produced and measured a prototype that shows that it is possible, largely using familiar engine... 详细信息

We report on the results of the Protocol Design Group of the W3C's HTTP 'Next Generation' Activity. the group produced and measured a prototype that shows that it is possible, largely using familiar engineering principles, to make simultaneous improvements in the following problem areas of HTTP/1.1: (1) the layering of other application protocols over HTTP;(2) modularity and extensibility;(3) networking performance and fairness;(4) the rigid binding between identifiers and protocol stacks;and (5) the opacity of layered traffic to firewalls. the prototype also suggests that these can be done in a way that may lead to unifying the Web with related middleware systems such as COM, CORBA, and Java RMI. (C) 2000 Published by Elsevier Science B.V. All rights reserved.

关键词： HTTP-NG type system web applications distributed objects RPC

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Focused Web searching with PDAs

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COMPUTER NETWORKS-thE international JOURNAL OF COMPUTER AND TELECOMMUNICATIONS networking 2000年第1-6期33卷 213-230页

作者： Buyukkokten, O Garcia-Molina, H Paepcke, A Stanford Univ Digital Libraries Lab Stanford CA 94305 USA

the Stanford Power Browser project addresses the problems of interacting with the World Wide Web through wirelessly connected Personal Digital Assistants (PDAs). these problems include bandwidth limitations, screen real-estate shortage, battery capacity, and the time costs of pen-based search keyword input. As a way to address bandwidth and battery life limitations, we provide local sire search facilities for all sites. We incrementally index Web sites in real time as the PDA user visits them. these indexes have narrow scope at first, and improve as the user dwells on the site, or as more users visit the site over time. We address the keyword input problem by providing site specific-keyword completion, and indications of keyword selectivity within sites. the system is implemented on the Palm Pilot platform, using a Metricom radio link. We describe the user level experience, and then present the analyses that informed our technical decisions. (C) 2000 Published by Elsevier Science B.V. All rights reserved.

关键词： personal digital assistants handheld computers mobile computing palm pilot

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Scalable realization of Sparse distributed Memory on a multiprocessor system 9

Scalable realization of Sparse Distributed Memory on a multi...

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9th international conference on Intelligent Systems

作者： Kolinummi, P Tikkanen, KN Hämäläinen, T Saarinen, J Tampere Univ Technol Digital & Comp Syst Lab FIN-33101 Tampere Finland

ISBN: (纸本)1880843331

Parallel mappings of Sparse distributed Memory (SDM) are presented for a partial tree shape neurocomputer. the implemented partial tree shape neurocomputer called PARNEU is a scalable co-processor system to speed up soft computing applications. the used SDM algorithm benefits from the improved reading method and mask based activation. Two different mapping strategies are presented and analysed in detail the effect of SDM size is analysed and the system scalability is verified with speedup figures of different SDM networks. Almost linear speedup is achieved with reasonable size SDM algorithm.

关键词： Sparse distributed Memory neurocomputer parallel mapping

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Running the Web backwards: appliance data services

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COMPUTER NETWORKS-thE international JOURNAL OF COMPUTER AND TELECOMMUNICATIONS networking 2000年第1-6期33卷 619-631页

作者： Huang, AC Ling, BC Barton, JJ Fox, A Stanford Univ Dept Comp Sci Stanford CA 94305 USA Hewlett Packard Labs Palo Alto CA 94304 USA

9;Appliance9; digital devices such as handheld cameras, scanners, and microphones generate data that people want to put on Web pages. Unfortunately numerous complex steps are required. Contrast this with Web out... 详细信息

'Appliance' digital devices such as handheld cameras, scanners, and microphones generate data that people want to put on Web pages. Unfortunately numerous complex steps are required. Contrast this with Web output: handheld Web browsers enjoy increasing infrastructural support such as user-transparent transformation proxies, allowing unmodified Web pages to be conveniently viewed on devices not originally designed for the task. We hypothesize that the utility of input appliances will be greatly increased if they too were 'infrastructure enabled'. Appliance Data Services attempts to systematically describe the task domain of providing seamless and graceful interoperability between input appliances and the Web. We offer an application architecture and a validating prototype that we hope will 'open up the playing field' and motivate further work. Our initial efforts have identified two main design challenges: dealing with device heterogeneity, and providing a 'no-futz' out-of-the-box user experience for novices without sacrificing expressive power for advanced users. We address heterogeneity by isolating device and protocol heterogeneity considerations into a single extensible architectural component, allowing most of the application logic to deal exclusively with Web-friendly protocols and formats. We address the user interface issue in two ways: first, by specifying how to tag input with commands that specify how data are to be manipulated once injected into the infrastructure;second, by describing a late-binding mechanism for these command-tags, which allows 'natural' extensions of the device's UI for application selection and minimizes the amount of configuration required before end-users benefit from Appliance Data Services. Finally, we describe how to leverage existing services in the infrastructure;our prototype is based on HTTP and Java but our architecture could also leverage services connected via Jini or CORBA. We also describe an implemented prototype of par

关键词： information appliances infrastructure enablement ubiquitous computing internet services

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A property oriented fault detection approach for link state routing protocol 9

A property oriented fault detection approach for link state ...

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9th international conference on Computer Communications and Networks

作者： Wang, FY Gong, FM Wu, FS MCNC Adv Networking Res Grp Res Triangle Pk NC 27709 USA

ISBN: (纸本)0780364945

this paper proposes a new approach to fault detection for link state routing system - property oriented analysis and detection (POD). A routing system is modeled as a set of distributed processes. A properly is defined as stare predicate(s) over system variables. For link state routing protocol, the high-level overall converging property P is defined as the "synchronization" among routing information bases maintained by all processes. We decompose routing protocol into different computation phases. For each phase, we use invariant stare predicates (safety property) and liveness property as our guide for observation and analysis the goal of the detection algorithm is to construct a validation path based on the history to determine if the fault is natural or malicious once the stable property P is rendered invalid by faults. the contribution of this paper is two fold: first, a new detection approach is proposed that differs from traditional signature based or profile based intrusion detection paradigms in the sense that it utilizes stable property as a starting point, and correlates the history and future to validate changes in the system;second, by exploring primary concerned system properties, we show that detection effort can be conducted in a more focused and systematic fashion.

关键词： Fault detection

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Advertising database capabilities for information sharing 12th

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12th international conference on Advanced Information Systems Engineering, CAiSE 2000

作者： Embury, Suzanne M. Shao, Jianhua Gray, W. Alex Fishlock, Nigel Department of Computer Science Cardiff University P.O. Box 916 CardiffCF24 3XF United Kingdom Pirelli Cables Limited Communication Cables Wednesbury Street NewportNP9 0WS United Kingdom

ISBN: (纸本)9783540676300

the development of networking technology has resulted in a computing environment which is highly distributed, heterogeneous and dynamic. In order for the autonomous software components in such an environment to share their information, and hence to collaborate with each other, they must be able to advertise their capabilities — that is, to express what they have got to offer — in a form that can be understood by other resources. In this paper, we study the problem of advertising the capabilities of an important class of resources within distributed information systems: namely, databases. We argue that current advertising mechanisms have limitations when applied to database systems, and propose an approach which overcomes these limitations. the resulting advertisement language is flexible and allows database components to advertise their capabilities in botha general and a specific way. We have demonstrated its utility by using it to advertise capabilities within a network of product databases created for Pirelli Cables Ltd. © Springer-Verlag Berlin Heidelberg 2000

关键词： Marketing

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A distributed Multi-Agent System for Collaborative Information Management and Sharing 00

A Distributed Multi-Agent System for Collaborative Informati...

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9th international conference on Information and Knowledge Management (CIKM 2000)

作者： Chen, James R. Wolfe, Shawn R. Wragg, Stephen D. NASA Ames Research Center Mail Stop 269-2 Moffett Field CA94035-1000 United States QSS Group Inc. NASA Ames Research Center Mail Stop 269-2 Moffett Field CA94035-1000 United States

ISBN: (纸本)9781581133202

In this paper, we present DIAMS, a system of distributed, collaborative agents to help users access, manage, share and exchange information. A DIAMS personal agent helps its owner find information most relevant to current needs. It provides tools and utilities for users to manage their information repositories with dynamic organization and virtual views. Flexible hierarchical display is integrated with indexed query search to support effective information access. Automatic indexing methods are employed to support user queries and communication between agents. Contents of a repository are kept in object-oriented storage to facilitate information sharing. Collaboration between users is aided by easy sharing utilities as well as automated information exchange. Matchmaker agents are designed to establish connections between users with similar interests and expertise. DIAMS agents provide needed services for users to share and learn information from one another on the World Wide Web. © 2000 Association for computing Machinery. All rights reserved.

关键词： Information management

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Middleware-based architecture to support transparent data access by mobile users in heterogeneous environments

Middleware-based architecture to support transparent data ac...

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the 10th international Workshop on 'Research Issues in Data Engineering (RIDE 2000)'

作者： Pissinou, Niki Makki, Kia Konig-Ries, Birgitta Univ of Louisiana at Lafayette Lafayette United States

Mobile computing is becoming more and more pervasive, liberating users from the confines of wired networks. At the same time, transparent access to heterogeneous, distributed information sources has become a reality in wired computing. Obviously, this kind of access is highly desirable for mobile users, too. However, current architectures for transparent information access do not take the specific needs of mobile users into account, while existing architectures for mobile computing do not support transparent access well. For the future growth of the usage of mobile computing it is of utmost importance that instead of individually developed, isolated extensions to the existing architectures, the research community agrees on a strong, standardized middleware platform extending both existing mobile architectures and existing information access architectures to ensure mobile access in heterogeneous environments. In this paper we propose such a platform.

关键词： Mobile computing

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Recent advances in distributed Systems Operations and Management: Report on DSOM '98

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Journal of Network and Systems Management 1999年第1期7卷 133-136页

作者： Sethi, Adarshpal S. DSOM '98 General and Program Chair Department of Computer and Information Sciences University of Delaware Newark DE 19716 United States Department of Computer and Information Sciences University of Delaware Newark DE United States IBM Research Laboratories Zurich Switzerland U.S. Army Research Laboratory Aberdeen MD United States

the 9th Annual IFIP/IEEE international Workshop on distributed Systems, Operations and Management (DSOM 9;98) held at the University of Delaware in Newark, Delaware, on October 26-28, 1998 was presented. the genera... 详细信息

the 9th Annual IFIP/IEEE international Workshop on distributed Systems, Operations and Management (DSOM '98) held at the University of Delaware in Newark, Delaware, on October 26-28, 1998 was presented. the general scope of the DSOM workshop series is the operations and management of application software or services within a distributed system and the impact of advanced computing and networking technologies on management. the workshop attracted over 75 participants from 16 countries. Emerging issues and problems in the theme area were explored.

关键词： Management information systems

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An algorithm for multipath computation using distance-vectors with predecessor information 8

An algorithm for multipath computation using distance-vector...

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8th international conference on Computer Communications and Networks, ICCCN 1999

作者： Vutukury, Srinivas Garcia-Luna-Aceves, J.J. Computer Sciences Department University of California Santa CruzCA95064 United States Computer Engineering Department University of California Santa CruzCA95064 United States Networking and Security Center Sun Microsystems Laboratories Palo AltoCA94303 United States

ISBN: (纸本)0780357949

Routing algorithms in the IP Internet provide a single path between each source-destination pair and where more than one path is provided, they are paths of equal length. Single-path routing is inherently slow in responding to congestion and temporary traffic bursts;multiple paths are better suited to handle congestion. Also the paths provided in RIP and OSPF are not free of loops during times of network transition, which can be debilitating to network performance. We present a distributed routing algorithm for computing multiple paths that need not have equal length between each source-destination pair in a computer network such that they are loop-free at every instant - in steady state as well as during network transitions. the algorithm is scalable to large networks as it uses only one-hop synchronization which is unlike diffusing computations that require internodal synchronization spanning multiple hops. the safety and liveness properties of the algorithm are proven and its complexity is analyzed. © 1999 IEEE.

关键词： Internet protocols

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