检索结果-内蒙古大学图书馆

Conference on Local computer networks (LCN)

作者： Marcel Waldvogel Tobias Kock Zurich Research Laboratory IBM Research USA Distributed Systems Laboratory Department of Computer and Information Science University of Konstanz Konstanz Germany

This paper proposes a first step into a common solution, where combined and extended interests will hopefully allow us to surpass this threshold. While there are still some open issues, we hope to not only propose a basic working mechanism but also provide fresh ideas to start thinking off the beaten path. Our main contribution is to create a lightweight, end-to-end binding between path and service, which is then used as a basis to associate further attributes and mechanisms to this binding.

关键词： Quality of service computer crime Proposals Laboratories Cryptography computer networks Electric shock Signal processing Customer satisfaction distributed computing

来源：评论

学校读者我要写书评

暂无评论

Access Control Enforcement for Web Services by Event-Based Security Token Processing

Access Control Enforcement for Web Services by Event-Based S...

引用

Communication in distributed systems - 15. ITG/GI Symposium

作者： Nils Gruschka Ralph Herkenhoener Norbert Luttenberger Department of Computer Science Communication Systems Research Group Christian-Albrechts-University of Kiel Germany

Access control and ensuring availability are important tasks for securing Web Services. Both requirements are not well studied on Web Services and especially not their interactions. However, considering this interaction is crucial. On one hand, access control is an established mechanism for protecting services from attacks targeting the service's availability. On the other hand, enforcing access control on Web Services is a complex task and therefore access control implementations potentially offer new possibilities for attacks. In this paper a solution for Web Service access control enforcement is presented using an event-based processing model focusing on ensuring Web Service availability.

关键词： Lead Ions Authentication Authorization

来源：评论

学校读者我要写书评

暂无评论

Editorial

引用

International Journal of Internet Protocol Technology 2007年第1期2卷 1-2页

作者： Mulvenna, Maurice Galis, Alex Dobson, Simon Karmouch, Ahmed School of Computing and Mathematics Faculty of Engineering University of Ulster Newtownabbey BT37 0QB United Kingdom Networks and Services Research Group Department of Electronic and Electrical Engineering University College London Torrington Place London WC1E 7JE United Kingdom Systems Research Group School of Computer Science and Informatics UCD Dublin Belfield Dublin 4 Ireland University of Ottawa 161 Louis Pasteur Ottawa ON K1N 6N5 Canada

来源：评论

学校读者我要写书评

暂无评论

Predicting the effect on performance of container-managed persistence in a distributed enterprise application

Predicting the effect on performance of container-managed pe...

引用

21st International Parallel and distributed Processing Symposium, IPDPS 2007

作者： Bacigalupo, David A. Xue, James W. J. Hammond, Simon D. Jarvis, Stephen A. Dillenberger, Donna N. Nudd, Graham R. High Performance Systems Group Department of Computer Science University of Warwick Coventry CV4 7AL United Kingdom IBM T.J. Watson Research Centre Yorktown Heights NY 10598 United States

ISBN: (纸本)1424409101

Container-managed persistence is an essential technology as it dramatically simplifies the implementation of enterprise data access. However it can also impose a significant overhead on the performance of the application at runtime. This paper presents a layered queuing performance model for predicting the effect of adding or removing container-managed persistence to a distributed enterprise application, in terms of response time and throughput performance metrics. Predictions can then be made for new server architectures - that is, server architectures for which only a small number of measurements have been made (e.g. to determine request processing speed). An experimental analysis of the model is conducted on a popular enterprise computing architecture based on IBM Websphere, using Enterprise Java Bean-based container-managed persistence as the middleware functionality. The results provide strong experimental evidence for the effectiveness of the model in terms of the accuracy of predictions, the speed with which predictions can be made and the low overhead at which the model can be rapidly parameterised. © 2007 IEEE.

关键词： distributed computer systems

来源：评论

学校读者我要写书评

暂无评论

Optimal Batch Scheduling in DVB-S2 Satellite networks

Optimal Batch Scheduling in DVB-S2 Satellite Networks

引用

IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference

作者： G. T. Peeters B. Van Houdt C. Blondia Department of Mathematics and Computer Science Performance Analysis of Telecommunication Systems Research Group-IBBT University of Antwerp Antwerp Belgium

In this paper we present a new theoretical model to assess the performance of a class of batch scheduling orders in a forward DVB-S2 satellite link. The scheduling order in a DVB-S2 link will determine the order in which IP packets are transmitted to the receivers and thus determines the amount of required padding and sub-optimal transmissions. The validity of the model is investigated by various simulation runs which show a very close agreement with the theoretical model. Using this model we also identify the optimal scheduling order within this class of orders, given that some mild and realistic conditions on the modulation and coding schemes apply.

关键词： Digital video broadcasting Optimal scheduling Modulation coding Processor scheduling Artificial satellites Communication standards Payloads Mathematics computer science Performance analysis

来源：评论

学校读者我要写书评

暂无评论

Last-Backlogged First-Served Deficit Round Robin (LBFS-DRR) Packet Scheduling Algorithm

Last-Backlogged First-Served Deficit Round Robin (LBFS-DRR) ...

引用

IEEE International Conference on networks

作者： Dessislava Nikolova Chris Blondia Department Math. and Computer Science Performance Analysis of Telecommunication Systems Research Group University of Antwerp Antwerp Belgium

ISBN: (纸本)9781424412297;1424412293

In this article we present a novel packet scheduling algorithm LBFS-DRR, which combines features from the Last-Come First-Served scheduling discipline and the Deficit Round Robin (DRR) algorithm. In comparison with DRR it provides lower average packet delay, while preserving the advantageous feature like O(l) complexity, fairness, bandwidth guarantee. The lower mean delay is realized by giving service in a round first to flows transmitting bellow their (weighted) fair share. The algorithm exploits the high variability in the typical user traffic pattern resulting in lower mean file transfer delay.

关键词： Round robin Scheduling algorithm Delay Processor scheduling Global Positioning System Traffic control Bandwidth computer science Performance analysis Bellows

来源：评论

学校读者我要写书评

暂无评论

A Comparative Study of Nomadic Mobile Service Provisioning Approaches

A Comparative Study of Nomadic Mobile Service Provisioning A...

引用

International Conference on Next Generation Mobile Applications, Services and Technologies (NGMAST)

作者： Pravin Pawar Satish Srirama Bert-Jan van Beijnum Aart van Halteren Architecture and Services for Networked Applications Group Department of Computer Science University of Twente Netherlands Information Systems Group RWTH Aachen University Germany Philips Research Eindhoven Netherlands

In today's world of pervasive computing, the mobile devices are enriched with a variety of features and being used as a personal information delivery platform. The increased processing, storage and communication capabilities of these devices combined with the latest developments in the area of service oriented architecture enables a new class of services, called nomadic mobile services (NMS). Recent research has resulted in different NMS provisioning approaches; each one employs/defines a different architecture and addresses a different mix of issues. This paper provides a comparative study of three NMS provisioning approaches based on their architectural design, development choices and prototyped applications. Each approach has its own merits considering the applications they aim at. However, in the future, a solution which uses Web services for better interoperability and employs proxy approach for better QoS could be a possible technical design.

关键词： Mobile computing Service oriented architecture Pervasive computing Prototypes Web services Middleware Application software IP networks Personal digital assistants computer architecture

来源：评论

学校读者我要写书评

暂无评论

Free Spectral Range Matched Scanning Interrogator

Free Spectral Range Matched Scanning Interrogator

引用

Conference on Lasers and Electro-Optics (CLEO)

作者： Fengguo Sun Patrick Tsai Gaozhi Xiao Zhiyi Zhang Dayan Ban Photonic Systems Group Institute for Microstructural Science National Research Council Ottawa Canada Department of Electrical and Computer Engineering University of Waterloo Waterloo Canada

A free spectral range matched scanning interrogator has been proposed and demonstrated with an ultra high wavelength resolution of 5 pm. This system has great applications for wavelength-modulated distributed sensors ... 详细信息

ISBN: (纸本)9781424436484

关键词： Band pass filters Arrayed waveguide gratings Fabry-Perot Fiber gratings Bragg gratings Optical sensors Sensor arrays Temperature sensors Bandwidth Optical reflection

来源：评论

学校读者我要写书评

暂无评论

DMC Workshop Final Report

DMC Workshop Final Report

引用

IEEE International Workshop on Enabling Technologies: Infrastructure for Collaborative Enterprises (WET ICE)

作者： Marco Aiello Schahram Dustdar Harald Gall Department of Mathematics and Computer Science University of Groningam Groningen Netherlands Distributed Systems Group Technical University of of Vienna Wien Austria Institut für Informatik Universität Zürich Zurich Switzerland

The latest trends in distributed and mobile collaboration technologies allow people to move across team forms and organizational boundaries as well as to collaborate among/in organizations and communities. The ability to query the company's distributed knowledge base and to cooperate with co-workers is still a requirement, but new paradigms such as service-oriented computing increased pervasiveness, and mobility enable new scenarios and lead to higher complexity of systems. Independently of the business domain, private "collaboration" has become a hot issue. Virtual communities, may these be social networks or virtual enterprises, have enjoyed a tremendous popularity recently and are starting to require functionalities for collaboration in the broadest sense similar to those in business environments. The wide-spread availability of mobile devices makes support for mobility an arising topic in this domain as well.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Transmission protocols for challenging networks: LTP and LTP-T

Transmission protocols for challenging networks: LTP and LTP...

引用

International Workshop on Satellite and Space Communications (IWSSC)

作者： Fahad Syed Muhammad Laurent Franck Stephen Farrell Communication Propagation and Radar IETR National Institute for Applied Sciences Rennes France Microwaves Department ENST de bretagne Toulouse France Distributed Systems Group Department of Computer Science Trinity College Dublin Dublin Ireland

Challenging networks require transmission protocols able to deal with the specificities of the environment. These adverse conditions include very long delays (delays in hours are normal), episodic connectivity, asymmetric data rates, higher bit error rate (The raw BERs are in the order of 10 -2 ), very high free space losses (around 250-300 dB) and power constraints that may severely compromise the effectiveness of standard transport protocols. Transmissions protocols must also relieve applications and other upper-layer protocols (like the bundle protocol from the Delay Tolerant Network architecture) from the need to deal with the characteristics of intervening communications networks and services. In this paper we analyse the impacts of parameters such as loss probability and propagation delay on Licklider Transmission Protocol (LTP) [1], [2] and the newly proposed Licklider Transmission Protocol-(LTP-T) [3] following a comparative study of both the protocols.

关键词： Propagation delay Bit error rate Propagation losses Earth Mars Delay effects Transport protocols Disruption tolerant networking Communication standards IP networks

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：