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Adjusted probabilistic packet marking for IP traceback 2nd

2nd International IFIP-TC6 Networking Conference, NETWORKING 2002

作者： Peng, Tao Leckie, Christopher Ramamohanarao, Kotagiri ARC Special Research Center for Ultra-Broadband Information Networks Department of Electrical and Electronic Engineering The University of Melbourne VIC3010 Australia Department of Computer Science and Software Engineering The University of Melbourne VIC3010 Australia

ISBN: (纸本)3540437096

Distributed denial-of-service attack is one of the greatest threats to the Internet today. One of the biggest difficulties in defending against this attack is that attackers always use incorrect, or "spoofed" IP source addresses to disguise their true origin. In this paper, we present a packet marking algorithm which allows the victim to traceback the approximate origin of spoofed IP packets. The difference between this proposal and previous proposals lies in two points. First, we develop three techniques to adjust the packet marking probability, which significantly reduces the number of packets needed by the victim to reconstruct the attack path. Second, we give a detailed analysis of the vulnerabilities of probabilistic packet marking, and describe a version of our adjusted probabilistic packet marking scheme whose performance is not affected by spoofed marking fields. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Denial-of-service attack

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Adaptive QoS management for collaboration in heterogeneous environments 16

Adaptive QoS management for collaboration in heterogeneous e...

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16th International Parallel and Distributed Processing Symposium, IPDPS 2002

作者： Chowdhury, R. Bhandarkar, P. Parashar, M. Applied Software Systems Laboratory Department of Electrical and Computer Engineering CAIP Center Rutgers the State University of New Jersey 94 Brett Road PiscatawayNJ08854 United States

ISBN: (纸本)0769515738

Adaptive Quality-of-Service management is critical for enabling effective collaboration between distributed clients in a heterogeneous (wired and wireless) environment. This is because both client profiles (capabilities, interests and resources) and system resources can be significantly different and highly dynamic. This paper presents the design and prototype implementation of an adaptive QoS management framework for collaborative multimedia applications in distributed, heterogeneous environments. The overall goal of the framework is to locally adapt the shared information to meet the capabilities, interests and current state of each collaborating client while preserving the semantic content of the information to maintain effective sharing. Transformations investigated in this paper include gradual gradations and modality transformations. The framework builds on a publisher-subscriber messaging substrate that uses semantic profiles and provides each client with direct and immediate access to all information defined by its needs and capabilities, without having to maintain and update global rosters. It interfaces with the Simple Network Management Protocol (SNMP) to determine the state of the network by directly querying network elements. An experimental evaluation of the framework for wired and wireless clients is also presented. © 2002 IEEE.

关键词： Adaptive QoS management collaboration heterogeneity multimedia network management publisher-subscriber paradigm

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Polygonal mesh simplification with face color and boundary edge preservation using quadric error metric 4

Polygonal mesh simplification with face color and boundary e...

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4th International Symposium on Multimedia software engineering, MSE 2002

作者： Fahn, Chin-Shyurng Chen, Hung-Kuang Shiau, Yi-Haur Department of Computer Science and Information Engineering National Taiwan University of Science and Technology Taipei106 Taiwan Department of Electronic Engineering National Taiwan University of Science and Technology Taipei106 Taiwan Software and Development Division National Center for High-Performance Computing Hsinchu300 Taiwan

ISBN: (纸本)0769518575

In applications such as scientific and medical visualization, highly detailed polygonal meshes are needed. Rendering these polygonal meshes usually exceeds the capabilities of graphics hardware. To improve rendering efficiency and maintain proper interactivity, the polygonal mesh simplification technique is commonly used to reduce the number of polygons of the mesh and construct a multiresolution representation. We propose a new and simple constraint scheme based on the quadric error metric proposed by Garland and Heckbert (1997, 1998) to preserve face colors and boundary edges during the simplification process. In addition, our method generates progressive meshes that store the polygonal mesh in a continuous multi-resolution representation. According to our experimental results, this new method is successful in preserving face colors and boundary edges. Moreover, we compare the latency of resolution changes for progressive meshes of various models. © 2002 IEEE.

关键词： Color

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Partition-based similarity join in high dimensional data spaces 13th

Partition-based similarity join in high dimensional data spa...

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13th International Conference on Database and Expert Systems Applications, DEXA 2002

作者： Shin, Hyoseop Moon, Bongki Lee, Sukho Software Center Samsung Electronics Co. LTD Seoul Korea Republic of Department of Computer Science University of Arizona TucsonAZ85721 United States School of Computer Science and Engineering Seoul National University Seoul Korea Republic of

ISBN: (纸本)3540441263

It is not desirable in the performance perspective of search algorithms to partition a high dimensional data space by dividing all the dimensions. This is because the number of cells resulted from partitioning explodes as the number of partitioning dimensions increases, thus making any search method based on space partitioning impractical. To address this problem, we propose an algorithm to dynamically select partitioning dimensions based on a data sampling method for efficient similarity join processing. Futhermore, a disk-based plane sweeping method is proposed to minimize the cost of joins between the partitioned cells. The experimental results show that the proposed schemes substantially improve the performance of the partition-based similarity joins in high dimensional data spaces. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Clustering algorithms

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A new mathematical notation for describing notion and thought in software design

A new mathematical notation for describing notion and though...

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IEEE International Conference on Cognitive Informatics

作者： Yingxu Wang Department of Electrical & Computer Engineering Theoretical and Empirical Software Engineering Research Center University of Calgary Calgary AB Canada

ISBN: (纸本)0769517242

Conventional software description is algorithm-based. However, a large part of things in software description are nonalgorithmic and nonfunctional, such as those of system architectures, dynamic behaviors, performance, and quality. Therefore, contemporary concept in software description has been shifted from algorithms to software architectures and behaviors. software behaviors can be modeled as a 3D representation comprising mathematical operations, event/process timing, and memory manipulation. This paper introduces the real-time process algebra (RTPA) that serves as an expressive notation system for describing thoughts and notions in software design. RTPA is used to address the 3D problem in component-based software description and specification. Case studies on applications of RTPA in component-based software engineering are demonstrated with real-world examples.

关键词： software design software algorithms software performance software quality computer architecture software architecture Mathematical model Timing Real time systems Algebra

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On cognitive informatics

On cognitive informatics

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IEEE International Conference on Cognitive Informatics

作者： Yingxu Wang Theoretical and Empirical Software Engineering Research Center Department of Electrical & Computer Engineering University of Calgary Calgary AB Canada

ISBN: (纸本)0769517242

Information is the third essence in modeling the natural world. This paper attempts to explore an emerging discipline know as cognitive informatics. Cognitive Informatics is a profound interdisciplinary research area that tackles the common root problems of modern informatics, computation, software engineering, artificial intelligence (AI), neural psychology, and cognitive science. Cognitive informatics studies the internal information processing mechanisms and natural intelligence of the brain. This paper describes historical development of informatics from the classical information theory, contemporary informatics, to cognitive informatics. The domain of cognitive informatics and its interdisciplinary nature are explored. Foundations of cognitive informatics, particularly the brain vs. the mind, the acquired life functions vs. the inherited ones, and generic relationships between information, matter and energy are investigated. The potential engineering applications of cognitive informatics and perspectives on future research are discussed. It is expected that the investigation into cognitive informatics will result in fundamental findings towards the development of next generation IT and software technologies, such as neural computers, bioinformatics, quantum information processing, new software development approaches, and new architectures of information systems.

关键词： Cognitive informatics Artificial intelligence Information processing Quantum computing software engineering Psychology Cognitive science Information theory Power engineering and energy Application software

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On the informatics laws of software

On the informatics laws of software

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IEEE International Conference on Cognitive Informatics

作者： Yingxu Wang Theoretical and Empirical Software Engineering Research Center (TESERC) Department of Electrical & Computer Engineering University of Calgary Calgary AB Canada

ISBN: (纸本)0769517242

A fundamental finding in computer science is that software, as an artifact of human creativity, is not constrained by the laws and principles discovered in the physical world. Thus, a natural question we have to ask is: What are the constraints that software obeys? This paper attempts to demonstrate that software obeys the laws of informatics, because software is a mathematical entity, a coded solution, and a special type of information at a certain abstract level. Based on the above argument, another fundamental question is introduced that asks: What are the laws and principles of informatics that constrain software in software engineering? This paper explores a set of informatics, cognitive, psychological, and linguistic properties and laws, which are developed to answer the above profound question.

关键词： software engineering Cognitive informatics computer science Humans Psychology Communication system software Manufacturing Physics computing Drives Constraint theory

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Formal specification of a real-time lift dispatching system

Formal specification of a real-time lift dispatching system

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Canadian Conference on Electrical and computer engineering (CCECE)

作者： Yingxu Wang F.C. Ngolah Department of Electrical & Computer Engineering Theoretical and Empirical Software Engineering Research Center University of Calgary Calgary AB Canada Department of Computer Science University of Buea Cameroon

This paper describes the formal specification of a lift dispatching system (LDS) by the real-time process algebra (RTPA). It is recognized that the specification of a real-time system is a hard problem because the specification has to address the 3D behaviors of software where timing, logic and dynamic memory allocation functionalities are very critical. The real-time process algebra (RTPA) is a descriptive formal notation system designed for real-time software system specification, and is able to address the 3D properties of real-time software systems. The aim of this paper is to demonstrate the use of RTPA in describing a lift dispatching system (LDS). The case study on LDS illustrates the applications of RTPA in real-time system specification and refinement. This case study on the realtime LDS system shows the features and advantages of the algebra-based approach to real-time system specification and refinement in RTPA.

关键词： Formal specifications Real time systems Dispatching Algebra Timing Control systems Hardware software systems computer interfaces Drives

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Open Authentication Model Supporting Electronic Commerce in Distributed Computing

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Electronic Commerce Research 2002年第1-2期2卷 135-149页

作者： Chang, Kyung-Ah Lee, Byung-Rae Kim, Tai-Yun Software Center Samsung Electronics Co. Ltd. Apkujong Bd 599-4 Shinsa-dong Kangnam-gu Seoul135-120 Korea Republic of Department of Computer Science and Engineering Korea University 1 5-ga Anam-dong Sungbuk-ku Seoul136-701 Korea Republic of

In this paper, based on CORBA security service specification [14], we propose the open authentication model for electronic commerce with an extension to the Kerberos authentication framework using public key cryptosystem. This proposed structure, by Kerberos [Kohl, Neuman and Ts'o, 9] for the authentication of peer entities, assures not only the identification of peer entities and the confidence of origin of business item for negotiations. Since our deployed Kerberos is extended to the PKC [Sirbu and Chung-I Chuang, 20] systems in distributed computing, it provides the flexibility of key management and the ability to leverage the certification infrastructure. © 2002, Kluwer Academic Publishers.

关键词： Authentication

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A component model for field devices 1

引用

IFIP/ACM Working Conference on Component Deployment, CD 2002

作者： Nierstrasz, Oscar Arévalo, Gabriela Ducasse, Stéphane Wuyts, Roel Black, Andrew P. Müller, Peter O. Zeidler, Christian Genssler, Thomas van den Born, Reinier Software Composition Group Institut für Informatik und Angewandte Mathematik University of Bern Switzerland Department of Computer Science and Engineering Oregon Health and Science University United States ABB Research Center Germany FZI Research Center for Information Technologies Germany OTI Netherlands

ISBN: (数字)9783540454403

ISBN: (纸本)3540438475

Component-based software development is becoming mainstream for conventional applications. However, components can be difficult to deploy in embedded systems because of non-functional requirements. PECOS is a collaborative project between industrial and research partners that seeks to enable component-based technology for a class of embedded systems known as "field devices". In this paper we introduce a component model for field devices that captures a range of non-functional properties and constraints. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Embedded systems

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