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作者： Song, Jiqiang Cai, Min Lyu, Michael R. Cai, Shijie Dept. Computer Science and Engineering Chinese University of Hong Kong Hong Kong Hong Kong State Key Lab. of Novel Software Technology Nanjing University Nanjing China

Recognizing graphic objects from binary images is an important task in many real-life applications. Generally, there are two ways to do the graphics recognition: one-step methods and two-step methods. The former recognizes graphic objects from binary images directly, while the latter consists of vectorization and postprocessing. Neither of them is perfect enough to handle all difficulties. This paper first reviews popular graphics recognition methods to understand their advantages and disadvantages. Next, the performance comparison between two classes of methods is made in two important aspects: the time efficiency and the graphics quality, and the experimental results of time-efficiency comparison of 7 popular methods are also reported. Finally, we propose a new hybrid graphics-recognition paradigm to integrate the advantages of both one-step methods and two-step methods and minimize their disadvantages. The proposed paradigm is capable of recognizing straight lines, arcs, circles and curves efficiently, and is helpful for extracting text images in text-graphics touching cases. © 2002 IEEE.

关键词： Character recognition

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Information Leakage from Optical Emanations

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ACM Transactions on Information and System Security 2002年第3期5卷 262-289页

作者： Loughry, Joe Umphress, David A. Lockheed Martin Space Systems Denver Dept. 3740 Mail Stop X3741 P.O. Box 179 CO 80201 United States Auburn University Department of Computer Science and Software Engineering AL 215 Dunstan Hall 36849 United States

A previously unknown form of compromising emanations has been discovered. LED status indicators on data communication equipment, under certain conditions, are shown to carry a modulated optical signal that is significantly correlated with information being processed by the device. Physical access is not required;the attacker gains access to all data going through the device, including plaintext in the case of data encryption systems. Experiments show that it is possible to intercept data under realistic conditions at a considerable distance. Many different sorts of devices, including modems and Internet Protocol routers, were found to be vulnerable. A taxonomy of compromising optical emanations is developed, and design changes are described that will successfully block this kind of “Optical TEMPEST” attack. © 2002, ACM. All rights reserved.

关键词： Comint Communication Compromising emanations COMSEC Covert channel EMSEC Encryption Experimentation Fiber optics Information displays Light emitting diode (LED) Security SIGINT TEMPEST

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The flow-service-quality framework: Unified engineering for large-scale, adaptive systems 35

The flow-service-quality framework: Unified engineering for ...

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35th Annual Hawaii International Conference on System Sciences, HICSS 2002

作者： Hevner, A. Linger, R. Sobel, A. Walton, G. Information Systems and Decision Sciences Dept. University of South Florida TampaFL United States Computer Science and Systems Analysis Dept. Miami University OxfordOH United States CERT Coordination Center Software Engineering Institute Carnegie Mellon University PittsburghPA United States School of Electrical Engr. and Computer Science University of Central Florida OrlandoFL United States

ISBN: (纸本)0769514359

Modern enterprises are irreversibly dependent on large-scale, adaptive, component-based information systems whose complexity frequently exceeds current engineering capabilities for intellectual control, resulting in persistent difficulties in system development, management, and evolution. We propose an innovative framework of engineering representation and reasoning methods for developing these complex systems: the flow-service-quality (FSQ) framework. In dynamic network information systems with constantly varying function and usage, workflows and their corresponding traces of system services act as stable foundations for functional and non functional (quality attribute) specification, design, and operational control. Our objective is to provide theoretical foundations, language representations, and rigorous yet practical unified engineering methods to represent and reason about system flows as essential artifacts of system specification, design, and operation. © 2002 IEEE.

关键词： Large scale systems

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Transition management of software process improvement 4th

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4th International Conference on Product Focused software Process Improvement, PROFES 2002

作者： Lee, Seon-Ah Choi, Byoungju Software Center Corporate RandD Center Samsung Electronics Co. Ltd 599-4 ShinSa-Dong KangNam-Gu Seoul135-120 Korea Republic of Dept. Of Computer Science and Engineering Ewha Womans University Seoul Korea Republic of

ISBN: (纸本)3540002340

Process improvement studies have tended to focus on software process improvement (SPI) framework such as the generic „best practices" models (e.g., CMM and SPICE), SPI Models (e.g., PDCA and IDEAL), and Quality Improvement Paradigm (QIP). However, there are still difficulties due to the resistance within the organization and the tendency to return to the previous state. In this study, we point out it is the transition part that is overlooked in the SPI Model and explain how we apply transition management to software process improvement in the software Center, Samsung Electronics Co. Ltd. The study also shows that considering transition management during SPI planning leads to more accurate estimation for time and goal achievement of SPI work. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Process engineering

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An Approach to Evolving Database Dependent Systems

An Approach to Evolving Database Dependent Systems

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Fifth International Workshop on Principles of software Evolution IWPSE 2002

作者： Grechanik, Mark Perry, Dewayne Batory, Don Dept. of Computer Sciences UT Ctr. Adv. Res. In Software Eng. University of Texas at Austin Austin TX 78712 United States Department of Electrical Engineering UT Ctr. Adv. Res. In Software Eng. University of Texas at Austin Austin TX 78712 United States

It is common in client/server architectures for components to have SQL statements embedded in their source code. Components submit queries to relational databases using such standards as Universal Data Access (UDA) and Open Database Connectivity (ODBC). The API that implements these standards is complex and requires the embedding of SQL statements in the language that is used to write the components. Such programming practices are widespread and result in increased complexity in maintaining systems. We propose an approach that eliminates the embedding of SQL in programming languages, thereby enabling the automation of important software maintenance tasks.

关键词： Relational database systems

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Abstraction and flow analysis for model checking open asynchronous systems

Abstraction and flow analysis for model checking open asynch...

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Asia-Pacific Conference on software engineering

作者： N. Ioustinova N. Sidorova Dept. of Software Engineering CWI (Centrum voor Wiskunde en Informatica) Amsterdam The Netherlands Dept. of Mathematics and Computer Science Eindhoven University of Technology Eindhoven The Netherland

Formal methods, especially model checking, are an indispensable part of the software engineering process. With large software systems currently beyond the range of fully automatic verification, however, a combination of decomposition and abstraction techniques is needed. To model check components of a system, a standard approach is to close the component with an abstraction of its environment. To make it useful in practice, the closing of the component should be automatic, both for data and for control abstraction. Specifically for model checking asynchronous open systems, external input queues should be removed, as they are a potential source of a combinatorial state explosion. In this paper we close a component synchronously by embedding the external environment directly into the system to avoid the external queues, while for the data, we use a two-valued abstraction, namely data influenced from the outside or not. This gives a more precise analysis than that investigated by Ioustinova et al. (2002). To further combat the state explosion problem, we combine this data abstraction with a static analysis to remove superfluous code fragments. The static analysis we use is reminiscent of that presented by Ioustinova et al., but we use a combination of a may and a must-analysis instead of a may-analysis.

关键词： Chaotic communication Explosions software engineering software systems Open systems Data analysis Mathematics computer science Mathematical model Automatic control

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A new approach for line recognition in large-size images using hough transform

Proceedings - International Conference on Pattern Recognitio...

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Proceedings - International Conference on Pattern Recognition 2002年第1期16卷 33-36页

The application of Hough Transform (HT) has been limited to small-size images for a long time. For large-size images, the peak detection and the line verification become much more time-consuming. Many HT-based line detection methods are not able to detect line width. This paper proposes a new approach for detecting line segments using HT, which makes HT applicable to large-size images, especially for those applications whose line width is critical. Our approach applies a boundary recorder to eliminate redundant analyses, and employs an image-analysis-based line-verification method to overcome the difficulty of using a threshold to distinguish short lines from noise. It avoids the overlapping lines by removing the pixels of detected line segments, which is more robust than only clearing the N×N neighborhood. This approach could be easily extended to improved HT methods that perform the global accumulation. The experimental result shows that this approach is very time-efficient for large-size images. © 2002 IEEE.

关键词： Object recognition

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A dynamic bitmap for huge file system in SANs

Recent Advances in Computers, Computing and Communications

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Recent Advances in computers, Computing and Communications 2002年 229-234页

作者： Kim, G.B. Kang, D.J. Park, C.S. Lee, Y.J. Shin, B.J. Computer System Department Comp. and Software Technology Labs. ETRI 161 Gajong-Dong Yusong-Gu Daejon 305-350 Korea Republic of Dept. of Computer Engineering Miryang National University 1025-1 Naei-dong Miryang Gyeongnam Korea Republic of

ISBN: (纸本)9608052629

A storage area network (SAN) is a high-speed special-purpose network (or subnetwork) that interconnects different kinds of data storage devices with associated data servers on behalf of a larger network of users. In SAN, computers service local file requests directly from shared storage devices. Direct device access eliminates the server machines as bottlenecks to performance and availability. Communication is unnecessary between computers, since each machine views the storage as being locally attached. SAN provides us to very large physical storage up to 64-bit address space, but traditional file systems can't adapt to the file system for SAN because they have the limitation of scalability. In this paper we propose a new mechanism for file system using dynamic bitmap assignment. While traditional file systems rely on a fixed bitmap structures for metadata such as super block, inode, and directory entries, the proposed file system allocates bitmap and allocation area depend on file system features. Our approaches give a solution of the problem that the utilization of the file system depends on the file size in the traditional file systems. We show that the dynamic bitmap mechanism this improves the efficiency of disk usage in file system when compared to the conventional file systems.

关键词： computer networks

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engineering education innovation with software engineering projects

Engineering education innovation with software engineering p...

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32nd Annual Frontiers in Education;Leading a Revolution in engineering and computer Science Education

作者： Bagert, Donald J. Gregory, James M. Mengel, Susan A. Heinze, Lloyd R. Dept. Comp. Sci. and Software Eng. Rose-Hulman Inst. of Technology 5500 Wabash Avenue Terre Haute IN 47803 United States College of Engineering Texas Tech University Lubbock TX 79409-3103 United States Department of Computer Science Texas Tech University Lubbock TX 79409-3104 United States Department of Petroleum Engineering Texas Tech University Lubbock TX 79409-3111 United States

This paper discusses the development of software engineering class projects that have produced tools which have been used to enrich the educational experience of engineering students, the end users of the software. The projects have involved the creation, maintenance and evolution of software that helps the students determine their major, understand their learning style, develop a semester-by-semester plan of study, and formulate a class schedule each semester. The evolution of the structure of the software engineering project process is first presented. Having "internal" clients (i.e. those who are employees of the university) for projects that directly benefit engineering students is then compared to having "external" clients. The benefits gained by all stakeholders through these projects and data supporting the satisfaction levels of those stakeholders is presented. Finally, there is a discussion of funded research projects that have been spun off from of these projects, and the plans for the further educational software development through these grants.

关键词： engineering education

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Characteristics of successful collaborations to produce educated software engineering professionals

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International Journal of Phytoremediation 2002年第1期21卷 119-140页

作者： Ellis, Heidi J.C. Mead, Nancy R. Moreno, Ana Tanner, Cynthia D. Ramsey, Dawn Rensselaer at Hartford Hartford CT United States Software Engineering Institute Carnegie Mellon University Pittsburgh PA United States School of Computer Science Universidad Politenica de Madrid Madrid Campus de Montegancedo Boadilla del Monte Spain West Virginia University Morgantown WV United States Dept. of Continuing Education Southern Polytechnic State University Extended University Marietta GA United States

Currently, a large gap exists between the number of open software engineering positions and the number of qualified software engineers to fill those positions. The Industry/University (I/U) subgroup of the Working Group on software engineering Education and Training (WGSEET) is investigating active collaborations between companies and universities in which non-software professionals and practitioners without formal software education are reeducated to become software engineers. This paper describes the current status of work performed by the I/U subgroup in the investigation of reeducation collaborations. It is our goal to identify the common characteristics of successful collaborations in order to provide guidance to universities and companies when constructing a collaborative program, as well as to promote future collaborations. In this paper, we report on the current activity of the I/U subgroup, describe the features of successful collaborations identified so far in our research, and provide some conclusions as to the usefulness of such collaborations. © 2002, Taylor & Francis Group, LLC.

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