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19th International Conference on Software engineering and Knowledge engineering, SEKE 2007

作者： Arbuckle, Tom Balaban, Adam Peters, Dennis K. Lawford, Mark Department of Computer Science and Information Systems CSIS Building University of Limerick Plassey Park Limerick Ireland Institute of Informatics Warsaw University Banacha 2 02-097 Warsaw Poland Electrical and Computer Engineering Faculty of Engineering and Applied Science Memorial University of Newfoundland St. John's NL A1B 3X5 Canada Department of Computing and Software Faculty of Engineering McMaster University Hamilton ON L8S 4K1 Canada

ISBN: (纸本)9781627486613

For some time now, researchers have been seeking to place software measurement on a more firmly grounded footing by establishing a theoretical basis for software comparison. Although there has been some work on trying to employ information theoretic concepts for the quantification of code documents, particularly on employing entropy and entropy-like measurements, we propose that employing the Similarity Metric of Li, Vit´anyi, and coworkers for the comparison of software documents will lead to the establishment of a theoretically justifiable means of comparing and evaluating software artifacts. In this paper, we review previous work on software measurement with a particular emphasis on information theoretic aspects, we examine the body of work on Kolmogorov complexity (upon which the Similarity Metric is based), and we report on some experiments that lend credence to our proposals. Finally, we discuss the potential advantages derived from the application of this theory to areas in the of software engineering. Copyright © (2007) by Knowledge Systems Institute (KSI).

关键词： Entropy

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A simulation-based methodology for evaluating the DPA-resistance of cryptographic functional units with application to CMOS and MCML technologies

A simulation-based methodology for evaluating the DPA-resist...

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2007 International Conference on Embedded computer Systems: Architectures, Modeling and Simulation, IC-SAMOS 2007

作者： Regazzoni, Francesco Badel, Stéphane Eisenbarth, Thomas Großschädl, Johann Poschmann, Axel Toprak, Zeynep Macchetti, Marco Pozzi, Laura Paar, Christof Leblebici, Yusuf Ienne, Paolo ALaRI University of Lugano Lugano Switzerland School of Engineering EPFL Lausanne Switzerland Horst Görtz Institute for IT Security Ruhr University Bochum Germany Department of Computer Science University of Bristol United Kingdom Milan Italy Faculty of Informatics University of Lugano Lugano Switzerland School of Computer and Communication Sciences EPFL Lausanne Switzerland

ISBN: (纸本)1424410584

This paper explores the resistance of MOS Current Mode Logic (MCML) against Differential Power Analysis (DPA) attacks. Circuits implemented in MCML, in fact, have unique characteristics both in terms of power consumption and the dependency of the power profile from the input signal pattern. Therefore, MCML is suitable to protect cryptographic hardware from DPA and similar side-channel attacks. In order to demonstrate the effectiveness of different logic styles against power analysis attacks, the non-linear bijective function of the Kasumi algorithm (known as substitution box S7) was implemented with CMOS and MCML technology, and a set of attacks was performed using power traces derived from SPICE-level simulations. Although all keys were discovered for CMOS, only very few attacks to MCML were successful. ©2007 IEEE.

关键词： Side channel attack

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BIST analyzer: A training platform for SoC testing

BIST analyzer: A training platform for SoC testing

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Frontiers in Education (FIE) Conference

作者： A. Jutman A. Tsertov A. Tsepurov I. Aleksejev R. Ubar H.-D. Wuttke Department of Computer Engineering Tallinn University of Technology Tallinn Estonia Faculty of Informatics and Automation Ilmenau Technical University Ilmenau Germany

Linear feedback shift registers (LFSR) and other pseudo-random pattern generators (PRPG) have become one of the central elements used in testing and self testing of contemporary complex electronic systems like processors, controllers, and high-performance integrated circuits. The current paper describes a training and research tool for learning basic and advanced issues related to PRPG-based test pattern generation. Unlike other similar systems, this tool facilitates study of various test optimization problems, allows fault coverage analysis for different circuits and with different LFSR parameters. The main didactic aim of the tool is presenting complicated concepts in a comprehensive graphical and analytical way. The multi-platform JAVA runtime environment allows for easy access and usage of the tool both in a classroom and at home. The BIST analyzer represents an integrated simulation, training, and research environment that supports both analytic and synthetic way of learning. Due to the above mentioned facts the tool provides a unique training platform to use in courses on electronic testing and design for testability. The BIST Analyzer has got a positive feedback from students of Darmstadt TU (Germany) and Tallinn TU (Estonia).

关键词： Built-in self-test Circuit testing Test pattern generators Electronic equipment testing Automatic testing System testing Linear feedback shift registers Integrated circuit testing Centralized control Linear feedback control systems

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A virtual type for a multiple-type object and its implementation

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Systems and computers in Japan 2007年第11期38卷 25-35页

作者： Sato, Hideki Aritsugi, Masayoshi School of Informatics Daido Institute of Technology Nagoya 457-8530 Japan Department of Computer Science Faculty of Engineering Gunma University Kiryu 376-8515 Japan

To deal with the evolution of data and applications and with the existence of multiple views for the same data, the object data model needs to be extended with the object extension functionality to allow an object to dynamically change its type, and the object viewing functionality to allow an object to be seen as if it had a different structure and behavior. This paper proposes the virtual type facility which provides a persistent object of INADA, an enhanced C++ persistent programming language compliant with the ODMG standard, with a different structure and behavior from those of its base types. Additionally, it presents the implementation details of the facility. The virtual type facility gives a different interface of an object to redefine its structure and behavior without affecting the behavior of a base type, while the multiple-type object of INADA allows an object to be dynamically extended to model an entity which changes its behavior with time. The virtual type facility integrates the object extension functionality and the object viewing functionality for dealing with the database evolution. © 2007 Wiley Periodicals, Inc.

关键词： Data reduction

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Towards Content Oriented Integration of Product and Robot System Models

Towards Content Oriented Integration of Product and Robot Sy...

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International Symposium on Logistics and Industrial informatics, LINDI

作者： Laszlo Horvath Imre J. Rudas Karel Jezernik John von Neumann Faculty of Informatics Budapest Technology Institute of Intelligent Engineering Systems Budapest Hungary Faculty of Electrical Engineering and Computer Science Institute of Robotics University of Maribor Maribor Slovenia

An approach and method to integrate virtual engineering and robot systems is introduced. The main idea is extended application of the principle of shape aspect that is well-proven in part modeling. Shape intensive robot system is engineered by using of shape modeling. Shapes are connected by special aspects in a shape aspect oriented model system. The main purpose of the proposed approach and method is better communication between product modeling and robot related engineering. Associativity definitions integrate part level functions into product level functions while behaviors and adaptivities are also handled as aspects. Paper starts with introduction and comparison of classical industrial product modeling and the proposed integrated product and robot system modeling. Following this, extended application of shape aspects and definition of connective aspects are detailed. Finally, implementation in open architecture industrial modeling systems is explained and future work is outlined.

关键词： Service robots Systems engineering and theory Robotics and automation Intelligent robots Solid modeling informatics Shape control computer aided manufacturing Logistics Electrical products industry

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A framework like a tool for specify motivating collaborative learning participatory simulations

A framework like a tool for specify motivating collaborative...

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11th International Conference on computer Supported Cooperative Work in Design, CSCWD 2007

作者： Zurita, Gustavo Baloian, Nelson Baytelman, Felipe Farias, Antonio Antunes, Pedro Universidad de Chile Information Systems Department Business School Santiago Chile Universidad de Chile Computer Science Departments Engineering School Santiago Chile Department of Informatics Faculty of Sciences University of Lisboa Bloco C6 Campo Grande 1700 Lisboa Portugal

ISBN: (纸本)1424409632

Several research efforts suggest that collaborative participatory simulations improve teaching and learning, increasing motivation inside the classroom. Currently, it has been mainly applied with students of primary and secondary educational levels, leaving higher level students aside. This paper presents a framework for implementing Participatory Simulations, where social interactions and motivational effects are the main facilitators. An instance of this framework was implemented for business school undergraduate students. Its implementation is simple, lightweight, fully based on pen-based, and designed to work with handhelds over an ad-hoc wireless network. ©2007 IEEE.

关键词： Students

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Efficient Algorithms for Mining Closed Multidimensional Sequential Patterns

Efficient Algorithms for Mining Closed Multidimensional Sequ...

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Veera Boonjing Panida Songram Software Systems Engineering Laboratory Department of Mathematics and Computer Science Faculty of Science King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand Department of Computer Science Faculty of Informatics Mahasarakham University Mahasarakham Thailand

A combination of closed sequential pattern mining and closed itemset pattern mining was proposed to mine closed multidimensional sequential patterns. There are two ways for this combination; (1) mining closed itemset patterns from multidimensional information followed by mining closed sequential patterns from sequences associated with closed itemset patterns, and (2) mining closed sequential patterns from sequences followed by mining closed itemset patterns from multidimensional information associated with closed sequential patterns. In the first way the major cost is mining all sequences associated with closed itemset patterns. A similar problem occurs with the second way, the major cost is mining all multidimensional information associated with closed sequential patterns. Therefore, this paper proposes two new combinations that don't need to mine all sequences in the first combination, and all multidimensional information in the second combination. Both combinations can be effected by exploiting two concepts. In the first combination, any closed sequential patterns associated with a closed itemset patten I can be found from a set of closed sequential patterns associated with a closed itemset pattern I' if I sup I'. In the second combination, any closed itemset patterns associated with a closed sequential pattern s can be found from a set of closed sequential patterns associated with a closed itemset pattern s' if s sup s'.

关键词： Multidimensional systems Data mining Itemsets Costs computer science Software algorithms Software systems Systems engineering and theory Laboratories Mathematics

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Communication and Knowledge Intensive engineering Modeling in Virtual Spaces

Communication and Knowledge Intensive Engineering Modeling i...

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International Symposium on Applied Computational Intelligence and informatics ( SACI)

作者： Laszlo Horvath Imre J. Rudas Simona Vaivoda Zsuzsa Preitl Institute of Intelligent Engineering Systems John von Neumann Faculty of Informatics Budapest Hungary Department of Automation and Applied Informatics Fac. of Automation and Computer Science Polytechnic University of Timisoara Timisoara Romania

engineering for development, production, and other product related company activities are being organized in virtual systems for lifecycle management of product data. This new age of engineering is a result of the continuous development for step-by-step moving of product design, analysis and other production engineering activities from conventional environments to modeling environments during the eighties and nineties. However, more developments were needed in knowledge based decision assistance in order to realize modeling of human intent, increasingly complex product structures, and efficient communication of product data. In recent years, a great change of engineering methodology and software produced program products in knowledge technology and advanced local and global communication. Group work of engineers is increasingly organized around special portals for engineering on the Internet. Although intensive research activities produced outstanding methods in knowledge-based solutions for engineering, these methods have not widespread in the industrial modeling practice. This paper attempts to evaluate the possibility that recent communication and knowledge intensive engineering modeling can be developed into communication and knowledge intensive virtual space technology. Paper starts with a discussion on integrated application of different groups of product modeling techniques. Following this, methods are evaluated for the management of product data (PDM). Next section emphasizes aspects, contexts, and intents as primary issues in modeling for relationships in product data and decisions by engineers. Finally, methods for the management of engineering activities for lifecycle of products are summarized, considering communities of engineers around Internet portals.

关键词： Knowledge engineering Data engineering engineering management Portals Internet Production systems Design engineering Product design Production engineering Humans

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A Novel Subband Decomposition Based Speckle Noise Reduction Algorithm for SAR Images

A Novel Subband Decomposition Based Speckle Noise Reduction ...

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International Conference on Recent Advances in Space Technologies (RAST)

作者： Gokhan Karasakal I. Erer Informatics Institute Advanced Technologies in Engineering Computer Science and Engineering Istanbul Technical University Istanbul Turkey Faculty of Electrical and Electronic Engineering Electronics and Communication Department Istanbul Technical University Istanbul Turkey

A new speckle reduction algorithm based on subband decomposition and multiscale edge detection is presented. The subband decomposition is performed using a DFT/RDFT-based symmetric, zero-phase, nonoverlapping digital filter bank. The noisy images are decomposed into sub-images using RDFT transform based subband decomposition, an edge image is obtained for each level using these sub-images, then a threshold value is estimated according to noise variance in each subband and soft-thresholding is applied on the non-edge regions of the subband images. The despeckled image is obtained from the thresholded subband images using the inverse RDFT transform. The proposed speckle reduction method is applied to several test images corrupted by speckle noise as well as experimental RADARSAT/SAR images. Despeckled images show that this method has better performance than the case where no edge information is used.

关键词： Speckle Noise reduction Discrete wavelet transforms Discrete Fourier transforms Noise level Image edge detection Radar polarimetry Digital filters Microwave filters Filtering

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Content Orientation in Integrated Product Modeling

Content Orientation in Integrated Product Modeling

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IEEE International Conference on Intelligent engineering Systems (INES)

作者： Laszlo Horvath Imre J. Rudas Gerhard P. Hancke John von Neumann Faculty of Informatics Budapest Technology Institute of Intelligent Engineering Systems Budapest Hungary Department of Electrical Electronic and Computer Engineering University of Pretoria Pretoria South Africa

Changes in engineering for development of product in the direction of increased complexity, more variants, and customer demand orientation stimulates implementation of advanced information technology in the form of virtual space. For this reason, concept of integrated product model has been implemented in comprehensive descriptions for lifecycle management of product information. Communication between engineer and modeling procedure is a critical factor. The authors identified data orientation of the recent integrated product modeling as a barrier for more efficient communication on user interfaces of product modeling systems. As a possible contribution to development of solution for this problem in industrial professional modeling systems, they propose content oriented layers between human and data oriented models in this paper. Following this, integration issues in content oriented product model are discussed. Next, relevant functions and modeling techniques for the handling of modeled object information are introduced and evaluated. Finally, a method is shown for the propagation of changes initiated for modeled objects in their affect zones.

关键词： Humans ISO standards Information technology User interfaces computer aided manufacturing CADCAM Automation Standards development Intelligent systems Systems engineering and theory

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