检索结果-内蒙古大学图书馆

International Workshop on Database and Expert systems Applications

作者： A. Pasala D. Janaki Ram Distributed & Object Systems Group Department of Computer Science and Engineering Indian Institute of Technology Chennai India

In mobile collaborative applications, collaborators may move across heterogeneous environments. This paper proposes object models for seamless transition of collaborators across heterogeneous environments. This is achieved by framing the various limitations of the environment as constraints and abstracting them into a constraint meta-object. Collaborator objects are dynamically customized by attaching the appropriate constraint meta-object based on the environment in which the collaborators are working. Remote customization of objects is achieved by 'distributed glue model'.

关键词： Collaborative work Collaboration Mobile computing computer science Application software Joining processes Wireless communication Physics computing Wireless networks Error analysis

来源：评论

学校读者我要写书评

暂无评论

The prototype of continuous media file system, CrownFS

The prototype of continuous media file system, CrownFS

引用

International Conference on Information Networking

作者： Se-Jin Hwang Jin-Uok Kim Myong-Soon Park Oh-Young Kwon Tae-Geun Kim Computer Systems Laboratory Computer Science Department Korea University Seoul South Korea Distributed Computing Laboratory Network Computing Department Systems Engineering Research Institute Daejeon South Korea

ISBN: (纸本)0818672250

Currently, many multimedia or continuous media server system is under development on top of either workstations or high-end PCs clustered with high speed networking facilities. In this paper we introduce Crown, a continuous media server on clustered high performance PCs with Myrinet, fast network switching equipment, and then address CrownFS, a file system on top of Crown, to offer continuous media streams to many subscribers at the same time. For easy and rapid tuning of the performance of CrownFS, we prototyped it. Prototyping requires less efforts and costs than direct implementation. Also, more reliable system optimization is obtainable rather than simulation. By using the prototype, we measured the scalability of CrownFS according to disk access strategies.

关键词： Prototypes File systems Streaming media Network servers Personal communication networks Multimedia systems Workstations High-speed networks File servers Costs

来源：评论

学校读者我要写书评

暂无评论

Constraint meta-object: A new object model for distributed collaborative designing

引用

IEEE TRANSACTIONS ON systems MAN AND CYBERNETICS PART A-systems AND HUMANS 1997年第2期27卷 208-221页

作者： Ram, DJ Vivekananda, N Rao, CS Mohan, NK Distributed and Object Systems Group Department of Computer Science and Engineering Indian Institute of Technology Chennai India

object databases have been recognized as providing rich data modeling capabilities for the next generation applications, especially CAD/CAM, software engineering, and multimedia, The core object model consisting of objects, messages and inheritance, however, is not adequate to tackle all the requirements of these applications, Since collaborative activity is one of the key features of next-generation applications, it is essential that the basic object model be extended to support collaborative activity, We propose an object model for collaborative designing based on objects and constraint meta-objects. Each design object has an associated constraint space consisting of one or more constraint meta objects. The object/constraint meta-object separation achieves a clear distinction between design object and its associated design environment and provides a framework for supporting collaboration among members of a design team, Collaboration is modeled as dependencies among multiple constraint spaces on different nodes, and collaborative activity as design transactions satisfying local constraints and propagating constraints among interrelated constraint spaces, We propose language extensions to C++ for capturing the object/constraint meta-object paradigm. The extensions are implemented using filters, a special mechanism for capturing messages sent to an object, Our model has been applied to the case of a mechanical CAD problem.

关键词： collaborative designing computer-aided design (CAD) computer-supported collaborative work (CSCW) constraint meta-object distributed object databases

来源：评论

学校读者我要写书评

暂无评论

PolyConstraints: A design pattern for flexible collaboration in heterogeneous mobile environments 24

PolyConstraints: A design pattern for flexible collaboration...

引用

24th International Conference on Technology of object-Oriented Languages and systems, TOOLS 1997

作者： Pasala, Anjaneyulu Ram, D. Janaki Distributed and Object Systems Group Department of Computer Science and Engineering Indian Institute of Technology Madras India

ISBN: (纸本)0818685514

In mobile collaborative applications, collaborating agents can move across heterogeneous networks. The collaborating agents also keep changing their roles depending on the work to be performed at that time. I n such situations, it requires a simple and flexible handling of transition between heterogeneous environments and roles. This paper proposes PolyConstraints, a design pattern to handle the generic problem of transition across multiple network environments and roles. © 1998 IEEE.

关键词： Heterogeneous networks

来源：评论

学校读者我要写书评

暂无评论

Banyan: a language for scalable parallel programming on loosely coupled distributed systems

Banyan: a language for scalable parallel programming on loos...

引用

International Conference on High Performance Computing in the Asia-Pacific Region

作者： D. Janaki Ram M.V. Sudhakiran T.N. Srikanta Distributed and Object Systems Group Department of Computer Science and Engineering Indian Institute of Technology Chennai India

Parallel programming on loosely coupled distributed systems is becoming a viable approach with the rapid increase in network speeds and availability of large amounts of unused CPU capacity on individual workstations. Parallel programs are often written for a specific configuration of the distributed system such as the number of nodes, their relative speeds and their network connections. These programs perform poorly when there is a change in the configuration or when they are taken to a system other than what they are intended for. We propose a new paradigm which can express the scale of a program as a part of the program itself. The scale of the program is specified in an abstract manner for an arbitrary number of nodes, their relative speeds and their network connections. The runtime system uses this information to decide the actual scale of program on a given distributed system.

关键词： Parallel programming Workstations Writing Runtime Concurrent computing computer science Availability computer networks Communication networks computer architecture

来源：评论

学校读者我要写书评

暂无评论

PolyConstraints: a design pattern for flexible collaboration in heterogeneous mobile environments

PolyConstraints: a design pattern for flexible collaboration...

引用

Technology of object-Oriented Languages and systems (TOOLS)

作者： A. Pasala D.J. Ram Distributed & Object Systems Group Department of Computer Science and Engineering Indian Institute of Technology Chennai India

In mobile collaborative applications, collaborating agents can move across heterogeneous networks. The collaborating agents also keep changing their roles depending on the work to be performed at that time. In such situations, a simple and flexible handling of the transition between heterogeneous environments and roles is required. This paper proposes PolyConstraints, a design pattern to handle the generic problem of transitions across multiple network environments and roles.

关键词： Collaboration object oriented modeling Wireless LAN Mobile computing Collaborative work Vehicles Context modeling Local area networks Error analysis Wide area networks

来源：评论

学校读者我要写书评

暂无评论

An efficient local address generation for the block-cyclic distribution

An efficient local address generation for the block-cyclic d...

引用

IEEE International Conference on Algorithms and Architectures for Parallel Processing (ICAP)

作者： Oh-Young Kwon Tae-Geun Kim Tack-Don Han Sung-Bong Yang Shin-Dug Kim Distributed Computing Laboratory Systems Engineering Research Institute Taejon South Korea Parallel Processing System Laboratory Department of Computer Science Yonsei University Seoul South Korea

ISBN: (纸本)0780342291

In order to generate local addresses for an array section A(l:h:s) with block-cyclic distribution, an efficient compiling method is required. In this paper, two local address generation methods for the block-cyclic distribution are presented. One is a simple local address generation method that is modified from the virtual-block scheme. The other is a linear-time /spl Delta/M table construction method. The array elements of A(l:h:s) to be accessed at run-time build up a family of lines. By using the equation of the lines, a /spl Delta/M table can be generated in O(k) time. Experimental results show that a simple local address generation method has poor performance but a linear-time /spl Delta/M table generation method is faster than other algorithms in /spl Delta/M table generation time and access time for 10,000 array elements.

关键词： Runtime Equations distributed computing systems engineering and theory Parallel processing Laboratories computer science Parallel languages Upper bound Automata

来源：评论

学校读者我要写书评

暂无评论

Scalable hardware priority queue architectures for high-speed packet switches

Scalable hardware priority queue architectures for high-spee...

引用

Real-Time Technology and Applications Symposium

作者： S.-W. Moon K.G. Shin J. Rexford Real-Time Computing Laboratory Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor MI USA Network Mathematics Research Networking and Distributed Systems AT and T Research Laboratories Murray Hill NJ USA

In packet-switched networks, queueing of packets at the switches can result when multiple connections share the same physical link. To accommodate a large number of connections, a switch can employ link-scheduling algorithms to prioritize the transmission of the queued packets. Due to the high-speed links and small packet sizes, a hardware solution is needed for the priority queue in order to make the link schedulers effective. But for good performance, the switch should also support a large number of priority levels (P) and be able to buffer a large number of packets (N). So a hardware priority queue design must be both fast and scalable (with respect to N and P) in order to be implemented effectively. In this paper we first compare four existing hardware priority queue architectures, and identify scalability limitations on implementing these existing architectures for large N and P. Based on our findings, we propose two new priority queue architectures, and evaluate them using simulation results from Verilog HDL and Epoch implementations.

关键词： Packet switching Switches Traffic control Scheduling algorithm Asynchronous transfer mode Hardware design languages Communication system traffic control computer architecture Moon Real time systems

来源：评论

学校读者我要写书评

暂无评论

PARALLEL AND distributed TLM COMPUTATION WITH SIGNAL-PROCESSING FOR ELECTROMAGNETIC-FIELD MODELING

引用

INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第3-4期8卷 169-185页

作者： SO, PPM ESWARAPPA, C HOEFER, WJR NSERC/MPR Teltech Research Chair in RF Engineering Department of Electrical and Computer Engineering University of Victoria Victoria British Columbia V8W 3P6 Canada Poman So received his B.Sc. degree in computer science and physics from the University of Toronto Toronto Onatario Canada in 1985. He obtained his B.A. Sc. and M.A.Sc. degrees in electrical engineering (summa cum laude) from the University of Ottawa Ottawa Ontario Canada in 1987 and 1989 respectively. Mr So was a research engineer in the University of Ottawa from January 1989 to October 1991 his research interests included CAD techniques of microwave circuits and numerical methods for electromagnetic wave modelling. He specialized in the development of electromagnetic engineering CAD software and successfully implemented a number of electromagnetic wave simulators based on the two-dimensional and three-dimensional transmission-line matrix methods. From August 1990 to February 1991 he accompanied Professor W. J. R. Hoefer to Rome Italy and Sophia Antiopolas France. During that time he implemented a parallel version of the 3D-TLM simulator for the CM-2 Connection Machine using C-Star and X Windows Library. He is a research engineer and a Ph.D. student at the University of Victoria Victoria British Columbia Canada. He ported the 2D- and 3D-TLM simulators to DECmpp 1200 massively parallel computer using MPL C and C++. He also combined OSA90/hope a commercially available microwave CAD program with a 2D-TLM simulation module for geometry optimization using the Datapipe technique of OSA90/hope. Recently he has developed a distributed client-server computing technique for the TLM method this technique could accelerate the TLM simulation by more than an order of magnitude. Channabasappa Eswarappa received the M.Tech. degree in electrical engineering from the Indian Institute of Technology Kanpur India in 1983 and Ph. D. degree from the University of Ottawa Canada in 1990. He worked as an Assistant Executive Engineer and later as

This paper describes the implementation of transmission-line matrix (TLM) method algorithms on a massively parallel computer (DECmpp 12000), the technique of distributed computing in the UNIX environment, and the combination of TLM analysis with Prony's method as well as with autoregressive moving average (ARMA) digital signal processing for electromagnetic field modelling. By combining these advanced computation techniques, typical electromagnetic field modelling of microwave structures by TLM analysis can be accelerated by a few orders of magnitude.

关键词： Mathematical models

来源：评论

学校读者我要写书评

暂无评论

A distributed Lisp programming system: Implementation and usage 12

A distributed Lisp programming system: Implementation and us...

引用

12th International Conference on distributed Computing systems, ICDCS 1992

作者： Pearson, Mark P. Dasgupta, Partha Distributed Systems Laboratory College of Computing Georgia Institute of Technology AtlantaGA30332-0280 United States Department of Computer Science and Engineering Arizona State University TempeAZ85287-5406 United States

The implementation details of a Lisp environment built on top of a distributed operating system are presented. The system provides transparent distribution, protected large-grain persistent heaps, concurrency within e... 详细信息

ISBN: (纸本)0818628650

关键词： distributed computer systems

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：