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12th International Symposium on software Reliability engineering

作者： Briand, Lionel C. Labiche, Yvan Wang, Yihong Software Quality Eng. Laboratory Carleton University Systems and Computer Engineering 1125 Colonel By Drive Ottawa Ont. K1S 5B6 Canada

The issue of ordering class integration in the context of integration testing has been discussed by a number of researchers. More specifically, strategies have been proposed to generate a test order while minimizing stubbing. Recent papers have addressed the problem of deriving an integration order in the presence of dependency cycles in the class diagram. Such dependencies represent a practical problem as they make any topological ordering of classes impossible. This paper proposes a strategy that integrates two existing methods aimed at "breaking" cycles so as to allow a topological order of classes. The first one was proposed by Tai et al and is based on assigning a higher-level order according to aggregation and inheritance relationships and a lower-level order according to associations. The second one was proposed by Le Traon et al and is based on identifying strongly connected components in the dependency graph. Among other things, the former approach may result into unnecessary stubbing whereas the latter may lead to breaking cycles by "removing" aggregation or inheritance dependencies, thus leading to complex stubbing. We propose here an approach that combines some of the principles of both approaches and addresses some of their shortcomings. All approaches (principles, benefits, drawbacks) are thoroughly compared by the means of a case study, based on a real system written in Java.

关键词： software engineering

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A classification scheme for studies on fault-prone components

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Lecture Notes in computer Science

作者： Runeson, Per Ohlsson, Magnus C. Wohlin, Claes Dept. of Communication Systems Lund University Box 118 LundSE-221 00 Sweden Dept. of Software Engineering & Computer Science Blekinge Institute of Technology RonnebySE-372 25 Sweden

ISBN: (纸本)3540425713

Various approaches are presented in the literature to identify faultprone components. The approaches represent a wide range of characteristics and capabilities, but they are not comparable, since different aspects are compared and different data sets are used. In order to enable a consistent and fair comparison, we propose a classification scheme, with two parts, 1) a characterisation scheme which captures information on input, output and model characteristics, and 2) an evaluation scheme which is designed for comparing different models’ capabilities. The schemes and the rationale for the elements of the schemes are presented in the paper. Important capabilities to evaluate when comparing different models are rate of misclassification, classification efficiency and total classification cost. Further, the schemes are applied in an example study to illustrate the use of the schemes. It is expected that applying these schemes would help researchers to compare different approaches and thereby enable building of a more consistent knowledge base in software engineering. In addition it is expected to help practitioners to choose a suitable prediction approach for a specific environment by filling out the characterisation scheme and making an evaluation in their own environment. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Classification (of information)

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CORBA based approach to the development of an advanced architecture in TINA service management system

CORBA based approach to the development of an advanced archi...

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International Workshop on Database and Expert systems Applications

作者： HeaSook Park O-Hoon Choi Doo-Kwon Baik Software Systems Laboratory Department of Computer Science & Engineering Korea University Seoul South Korea

ISBN: (纸本)0769512305

In order to satisfy, the complex and various demands of the customers, telecommunication networks must provide their services rapidly and flexibly, with the support of efficient service and network management systems. To fulfill these requirements, TINA has appeared as a concept for the advanced telecommunication system using information technology such as distributed processing, object oriented modeling. We mention some problems of developing applications in the TINA service management layer. To solve the problems, we propose the advanced architecture called OMS (object management system), which consists of three managers (data manager, data access manager and metadata registry manager). OMS separates the application layer and the middleware such as ODBC and JDBC. And the application layer and OMS are connected by distributed object middleware based on CORBA. Also in order to manage efficiently managed objects stored in different repositories, we have implemented metadata registry by using the metadata concept.

关键词： Distributed computing computer architecture computer network management Object oriented modeling Middleware Application software Telecommunication network management Distributed processing Environmental management Hardware

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The impact of design properties on development cost in object-oriented systems

The impact of design properties on development cost in objec...

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International Symposium on software Metrics

作者： L.C. Briand J. Wust Systems and Computer Engineering Carleton University Ottawa ONT Canada Experimental Software Engineering Fraunhofer Institute Kaiserslautern Germany

ISBN: (纸本)0769510434

In the context of software cost estimation, system size is widely taken as a main driver of system development effort, but other structural design properties, such as coupling, cohesion and complexity, have been suggested as additional cost factors. In this paper, using effort data from an object-oriented development project, we empirically investigate the relationship between class size and the development effort for a class, and what additional impact structural properties such as class coupling have on effort. We use Poisson regression and regression trees to build cost prediction models from size and design measures, and use these models to predict the system development effort. We also investigate a technique to combine regression trees with regression analysis, which aims at building more accurate models. The results indicate that fairly accurate predictions of class effort can be made based on simple measures of the class interface size alone; mean MREs (magnitudes of relative error) are below 30%. Effort predictions at the system level are even more accurate as, using bootstrapping, the estimated 95% confidence interval for MREs is 3%-23%, but more sophisticated coupling and cohesion measures do not help to improve these predictions to a degree that would be practically significant. However, the use of hybrid models, combining Poisson regression and CART (classification and regression trees) clearly improves the accuracy of the models as compared to using Poisson regression alone.

关键词： Costs Size measurement Regression tree analysis Object oriented modeling software measurement Time measurement Predictive models software engineering systems engineering and theory Drives

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Adaptive cluster computing using JavaSpaces

Adaptive cluster computing using JavaSpaces

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Annual IEEE Symposium on Foundations of computer Science

作者： J. Batheja M. Parashar The Applied Software Systems Laboratory Department of Electrical and Computer Engineering Rutgers University Piscataway NJ USA

We present the design, implementation and evaluation of a framework that uses JavaSpaces [1] to support this type of opportunistic adaptive parallel/distributed computing over networked clusters in a non-intrusive manner. The framework targets applications exhibiting coarse-grained parallelism and has three key features: (1) portability across heterogeneous platforms, (2) minimal configuration overheads for participating nodes, and (3) automated system state monitoring (using SNMP) to ensure nonintrusive behavior. Experimental results presented in this paper demonstrate that for applications that can be broken into coarse-grained, relatively independent tasks, the opportunistic adaptive parallel computing framework can provide performance gains. Furthermore, the results indicate that monitoring and reacting to the current system state minimizes the intrusiveness of the framework.

关键词： Java Parallel processing Concurrent computing Distributed computing Application software software systems Resource management Laboratories engineering profession computerized monitoring

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Middleware support for global access to integrated computational collaboratories

Middleware support for global access to integrated computati...

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International Symposium on High Performance Distributed Computing

作者： V. Mann M. Parashar The Applied Software Systems Laboratory Department of Electrical and Computer Engineering Rutgers University Piscataway NJ USA

The growth of the Internet and the advent of the computational "Grid" have made it possible to develop and deploy advanced computational collaboratories. These systems build on high-end computational resources and communication technologies underlying the Grid, and provide seamless and collaborative access to particular resources, services or applications. Integrating these "focused" collaboratories presents significant challenges. Key among these is the design and development of robust middleware support that addresses scalability, service discovery, security and access control, and interaction and collaboration management for consistent access. The authors first investigate the architecture of such a middleware that enables global (Web-based) access to collaboratories. They then present the design and implementation of a middleware substrate that enables a peer-to-peer integration of and global (collaborative) access to geographically distributed instances of the DISCOVER computational collaboratory for interaction and steering.

关键词： Middleware Grid computing International collaboration Peer to peer computing Internet Communications technology Robust control Scalability Communication system security Access control

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Inconsistency tolerance across enterprise solutions

Inconsistency tolerance across enterprise solutions

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IEEE Workshop on Future Trends of Distributed Computing systems

作者： P. Henderson R.J. Walters S. Crouch Declarative Systems and Software Engineering Group Department of Electronics and Computer Science University of Southampton Southampton UK

As every information system becomes connected to every other information system, they form the so-called "information utility". This is the domain in which contemporary distributed systems have to operate. New applications have to be evolved on this platform of existing systems that may hold inconsistent information. Consequently, solutions need to be able work in a world of only partially correct information. In this paper, we discuss means whereby architects, designers and engineers may, in this context of information inconsistency, develop new business solutions and reason about their validity. In particular we describe the properties of inter-enterprise system architectures for applications working with partially replicated and partially consistent information. These must be able to operate under reversible assumptions and to undo operations as a consequence of reversing assumptions. We have developed exemplary architectures that exhibit these properties, used them to investigate the concept of inconsistency-tolerant components and begun to devise methods of building inter-enterprise applications from such components. This approach, we conjecture, makes reasoning about the validity of proposed inter-enterprise scale solutions more straightforward and thus increases the speed with which new solutions can be deployed. We are evaluating these ideas now, by building, along with our industrial collaborators, realistic enterprise-scale demonstrations in the domains of Finance and Defence.

关键词： Distributed computing Internet software engineering computer science Information systems Design engineering Identity-based encryption Read only memory computer industry Finance

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Design and implementation of a CORBA commodity grid kit 2nd

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2nd International Workshop on Grid Computing, GRID 2001

作者： Vema, Snigdha Parashart, Manish Gawor, Jarek von Laszewski, Gregor The Applied Software Systems Laboratory Department of Electrical and Computer Engineering Rutgers University 94 Brett Road PiscatawayNJ08854-8058 United States Mathematics and Computer Science Division Argonne National Laboratory 9700 S. Cass Ave ArgonneIl60440 United States

ISBN: (纸本)3540429492

This paper reports on an ongoing research project aimed at designing and deploying a COMA Commodity Grid (COG) Kit. The overall goal of this project is to explore how commodity distributed computing technologies and state-of-the-art software engineering practices can be used for the development of advanced Grid applications. As part of this activity, we are investigating how CORBA can be integrated with the existing Grid infrastructure. In this paper, we present the design of a CORBA Commodity Grid Kit that provides a software development framework for building a CORBA "Grid domain." We then present our experiences in developing a prototype CORBA COG Kit that supports the development and deployment of CORBA applications on the Grid by providing them access to the Grid services provided by the Globus toolkit. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Common object request broker architecture (CORBA)

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Middleware for reactive components: An integrated use of context, roles, and event based coordination

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IFIP/ACM International Conference on Distributed systems Platforms, Middleware 2001

作者： Rakotonirainy, Andry Indulska, Jaga Loke, Seng Wai Zaslavsky, Arkady CRC for Distributed Systems Technology Level 7 General Purpose University of Queensland 4072 Australia School of Computer Science and Electrical Engineering The University of Queensland 4072 Australia School of Computer Science and Information Technology RMIT University GPO Box 2476V MelbourneVIC3001 Australia School of Computer Science and Software Engineering Monash University CaulfieldVIC3145 Australia

ISBN: (纸本)3540428003

The proliferation of mobile devices and new software creates a need for computing environments that are able to react to environmental (context) changes. To date insufficient attention has been paid to the issues of defining an integrated component-based environment which is able to describe complex computational context and handle different types of adaptation for a variety of new and existing pervasive enterprise applications. In this paper a run-time environment for pervasive enterprise systems is proposed. The associated architecture uses a component based modelling paradigm, and is held together by an event-based mechanism which provides significant flexibility in dynamic system configuration and adaptation. The approach used to describe and manage context information captures descriptions of complex user, device and application context including enterprise roles and role policies. In addition, the coordination language used to coordinate components of the architecture that manage context, adaptation and policy provides the flexibility needed in pervasive computing applications supporting dynamic reconfiguration and a variety of communication paradigms. © Springer-Verlag Berlin Heidelberg 2001.

关键词： Middleware

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An effective high-order interval method for validating existence and uniqueness of the solution of an IVP for an ODE

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Reliable Computing 2001年第6期7卷 449-465页

作者： Nedialkov, Nedialko S. Jackson, Kenneth R. Pryce, John D. Department of Computing and Software McMaster University Hamilton Ont. L8S 4L7 Canada Department of Computer Science University of Toronto Toronto Ont. M5S 3G4 Canada Computer Information Systems Engineering Department Cranfield University RMCS Shrivenham Swindon SN6 8LA United Kingdom

Validated methods for initial value problems for ordinary differential equations produce bounds that are guaranteed to contain the true solution of a problem. When computing such bounds, these methods verify that a unique solution to the problem exists in the interval of integration and compute a priori bounds for the solution in this interval. A major difficulty in this verification phase is how to take as large a stepsize as possible, subject to some tolerance requirement. We propose a high-order enclosure method for proving existence and uniqueness of the solution and computing a priori bounds.

关键词： Initial value problems

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