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IEEE International Conference on e-Technology, e-Commerce and e-Service

作者： A.B. Waluyo R. Hsieh D. Taniar W. Rahayu Bala Srinivasan School of Computer Science and Software Engineering Monash University Australia Department of Computer Science and Computer Engineering La Trobe University Australia School of Business Systems Monash University Australia

The emerging of wireless computing motivates radical changes of how information is derived. Our paper concerns with developing push and pull based application in wireless environment. We use a simplified e-health (hospital) context to demonstrate some effective uses of pull-based and push-based mechanisms. The pull mechanism involves information retrieval from a database, and update information in the database. The push mechanism is classified into three scenarios, (i) aperiodic push, (ii) periodic push - global recipients and (iii) periodic push - selective recipients.

关键词： Hospitals Databases Network servers Context computer science Information retrieval Unicast Broadcasting Communication system control software engineering

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A replicated experiment of usage-based and checklist-based reading

A replicated experiment of usage-based and checklist-based r...

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International Symposium on software Metrics

作者： T. Thelin C. Andersson P. Runeson N. Dzamashvili-Fogelstrom Department of Communication Systems Lund University Lund Sweden Department of Software Engineering and Computer Science Blekinge Institute of Technology Ronneby Sweden

software inspection is an effective method to detect faults in software artefacts. Several empirical studies have been performed on reading techniques, which are used in the individual preparation phase of software inspections. Besides new experiments, replications are needed to increase the body of knowledge in software inspections. We present a replication of an experiment, which compares usage-based and checklist-based reading. The results of the original experiment show that reviewers applying usage-based reading are more efficient and effective in detecting the most critical faults from a user's point of view than reviewers using checklist-based reading. We present the data of the replication together with the original experiment and compares the experiments. The main result of the replication is that it confirms the result of the original experiment. This replication strengthens the evidence that usage-based reading is an efficient reading technique.

关键词： Inspection Fault detection Testing Communication system software computer science software metrics Bioreactors Springs software engineering

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An authorization model for multimedia digital libraries

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International Journal on Digital Libraries 2004年第3期4卷 139-155页

作者： Kodali, Naren Farkas, Csilla Wijesekera, Duminda Department of Information and Software Engineering George Mason University Fairfax VA 22030-4444 United States Center for Secure Information Systems George Mason University Fairfax VA 22030-4444 United States Information Security Laboratory University of South Carolina Columbia SC 29208 United States Department of Computer Science and Engineering University of South Carolina Columbia SC 29208 United States

In this paper we present a generalized authorization model for multimedia digital libraries. Our aim is to support the enforcement of access control requirements of the original data sources without the need to create a new, unified model for the digital library. We integrate the three most widely used access control models (i.e., mandatory, discretionary, and role-based) within a single framework, allowing seamless accesses to data protected by these security models. In particular, we address the access control needs of continuous media data while supporting quality of service (QoS) requirements and preserving operational semantics. The technical core of the paper focuses on the development of metadata and the corresponding metastructure to represent authorization policies and QoS requirements and shows their applicabilty to continuous media. We define our security objects based on the Synchronized Multimedia Integration Language (SMIL), which controls multimedia presentations. Following the synchronization constructs 〈par〉 and 〈seq〉 of SMIL, we define a normal form for multimedia streams, called SMIL normal form. SMIL normal form provides a syntax-independent representation of semantically equivalent multimedia data. SMIL normal form compositions are extended (decorated) with RDF statements, representing security and QoS metadata. Interpretation of these statements and, therefore, the authorization and QoS requirements of the decorated multimedia object are defined by the metastructure, represented as a DAML+OIL ontology. We propose the concept of generalized subject that encompasses all access permissions of a given user regardless of the multiple permissions in different access control models. Finally, we develop methods to generate secure views for each generalized subject and retrieve them using a secure multimedia server. © Springer-Verlag 2004.

关键词： Access control Continuous media Digital library Metadata Semantics

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Planar orthogonal drawing of complete binary trees inside rectilinear polygons

Planar orthogonal drawing of complete binary trees inside re...

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IEEE International Conference on Multi Topic

作者： A. Bagheri M. Razzazi Software Systems Research & Development Lab Department of Computer Engineering & IT Amirkabir University of Technology슠 Tehran Iran Software Systems Research & Development Lab Department of Computer Engineering & IT Institute for Studies in Theoretical Physics and Mathematics (I.P.M) Amirkabir University of Technology슠 Tehran Iran

In this paper we introduce a new algorithm for planar orthogonal drawing of complete binary trees on the surface of a given simple rectilinear polygon. Our algorithm aims to uniformly distribute the vertices of the given tree on the given surface and to reduce the total number of edge bends as much as possible. We also introduce a new linear time algorithm for bisecting simple (rectilinear) polygons, assuming the straight skeletons of the polygons are given. To our knowledge, this paper and the previous works of the authors are the first attempts for developing algorithms that draw trees on 2D surfaces which are bounded by simple (rectilinear) polygons.

关键词： Binary trees Tree graphs Skeleton engineering drawings Application software Very large scale integration Graphical user interfaces Research and development Optical computing Physics computing

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Web-based platform for multimedia programming

Web-based platform for multimedia programming

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IEEE International Conference on Multimedia and Expo (ICME)

作者： A.P. Vazhenin Ying-Hong Wang D.A. Vazhenin Department of Computer Software University of Aizu Fukushima Japan Department of Computer Science and Information Engineering Tamkang University Tamsui Taiwan Graduate School Department of Information Systems University of Aizu Fukushima Japan

This paper describes basic elements of the Web-based platform for multimedia programming which is designed in the framework of the WWW-oriented workplace of applied programmer (W4AP). The proposed platform hides the insignificant features of software and hardware from the applied programmers and provides a unified style for different programming development tools; a comfortable environment combining visual and multimedia programming technologies. The architecture of the W4AP server is shown supporting a programming process and manipulations with multimedia data. Examples are demonstrated of the practical use of the proposed platform as well as user interface features

关键词： Programming profession Electronic mail computer architecture Application software computer interfaces Resource management Large-scale systems Web and internet services Information systems systems engineering and theory

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Approximate caches for packet classification

Approximate caches for packet classification

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IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： F. Chang Wu-chang Feng Kang Li Systems Software Laboratory OGI School of Science and Engineering at OHSU Beaverton OR USA Department of Computer Science University of Georgia Athens GA USA

Many network devices such as routers and firewalls employ caches to take advantage of temporal locality of packet headers in order to speed up packet processing decisions. Traditionally, cache designs trade off time and space with the goal of balancing the overall cost and performance of the device. We examine another axis of the design space that has not been previously considered: accuracy. In particular, we quantify the benefits of relaxing the accuracy of the cache on the cost and performance of packet classification caches. Our cache design is based on the popular Bloom filter data structure. This paper provides a model for optimizing Bloom filters for this purpose, as well as extensions to the data structure to support graceful aging, bounded misclassification rates, and multiple binary predicates. Given this, we show that such caches can provide nearly an order of magnitude cost savings at the expense of misclassifying one billionth of packets for IPv6-based caches.

关键词： Filters Costs Aging Data structures Cache storage System software Laboratories Modems Protocols Classification algorithms

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Generic Environment for Full Automation of Benchmarking 1

Generic Environment for Full Automation of Benchmarking

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Testing of Component-Based systems and software Quality, 1st International Workshop on software Quality, SOQUA 2004 and Workshop Testing Component-Based systems, TECOS 2004

作者： Kalibera, Tomáš Bulej, Lubomír Tůma, Petr Distributed Systems Research Group Department of Software Engineering Faculty of Mathematics and Physics Charles University Malostranské nám. 25 Prague118 00 Czech Republic Institute of Computer Science Czech Academy of Sciences Pod Vodárenskou věží 2 Prague182 07 Czech Republic

ISBN: (纸本)3885793873

Regression testing is an important part of software quality assurance. We work to extend regression testing to include regression benchmarking, which applies benchmarking to detect regressions in performance. Given the specific requirements of regression benchmarking, many contemporary benchmarks are not directly usable in regression benchmarking. To overcome this, we present a case for designing a generic benchmarking environment that will facilitate the use of contemporary benchmarks in regression benchmarking, analyze the requirements and propose architecture of such an environment. © 2004 Gesellschaft fur Informatik (GI). All rights reserved.

关键词： Benchmarking

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Automated data mapping specification via schema heuristics and user interaction 04

Automated data mapping specification via schema heuristics a...

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IEEE International Conference on Automated software engineering (ASE)

作者： S. Bossung H. Stoeckle J. Grundy R. Amor J. Hosking Software Systems Group Technical University Hamburg-Harburg Hamburg Germany Department of Computer Science University of Auckland Auckland New Zealand Department of Electrical and Computer Engineering University of Auckland Auckland New Zealand

ISBN: (纸本)9780769521312

Data transformation problems are very common and are challenging to implement for large and complex datasets. We describe a new approach for specifying data mapping transformations between XML schemas using a combination of automated schema analysis agents and selective user interaction. A graphical tool visualizes parts of the two schemas to be mapped and a variety of agents analyze all or parts of the schema, voting on the likelihood of matching subsets. The user can confirm or reject suggestions, or even allow schema matches to be automatically determined, incrementally building up to a fully-mapped schema. An implementation of the mapping specification can then be generated.

关键词： XML Voting Java computer science Data engineering Buildings Programming software tools Data visualization Prototypes

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Assertions in object oriented software maintenance: analysis and case study

Assertions in object oriented software maintenance: analysis...

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International Conference on software Maintenance (ICSM)

作者： M. Satpathy N.T. Siebel D. Rodriguez Applied Software Engineering Group Department of Computer Science University of Reading Reading UK COGNITIVE Systems Group Institute of Computer Science and Applied Mathematics Christian-Albrechts University Kiel Germany

Assertions had their origin in program verification. For the systems developed in industry, construction of assertions and their use in showing program correctness is a near-impossible task. However, they can be used to show that some key properties are satisfied during program execution. We first present a survey of the special roles that assertions can play in object oriented software construction. We then analyse such assertions by relating them to the case study of an automatic surveillance system. In particular, we address the following two issues: What types of assertions can be used most effectively in the context of object oriented software? How can you discover them and where should they be placed? During maintenance, both the design and the software are continuously changed. These changes can mean that the original assertions, if present, are no longer valid for the new software. Can we automatically derive assertions for the changed software?.

关键词： software maintenance computer aided software engineering

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Regression benchmarking with simple middleware benchmarks

Regression benchmarking with simple middleware benchmarks

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IEEE International Conference on Performance, Computing and Communications (IPCCC)

作者： L. Bulej T. Kalibera P. Tuma Distributed Systems Research Group Department of Software Engineering Charles University Prague Czech Republic Institute of Computer Science Academy of Sciences슠of the슠Czech Republic Prague Czech Republic

The paper introduces the concept of regression benchmarking as a variant of regression testing focused at detecting performance regressions. Applying the regression benchmarking in the area of middleware development, the paper explains how regression benchmarking differs from middleware benchmarking in general. On a real-world example of TAO, the paper shows why the existing benchmarks do not give results sufficient for regression benchmarking, and proposes techniques for detecting performance regressions using simple benchmarks.

关键词： Middleware Benchmark testing software testing System testing Quality assurance software systems software engineering Mathematics Physics computer science

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