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International Conference on Autonomic Computing (ICAC)

作者： S.M. Sadjadi P.K. McKinley Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI USA

This paper addresses the design of adaptive middleware to support autonomic computing in pervasive computing environments. The particular problem we address here is how to support self-optimization to changing network connection capabilities as a mobile user interacts with heterogeneous elements in a wireless network infrastructure. The goal is to enable self-optimization to such changes transparently with respect to the core application code. We propose a solution based on the use of the generic proxy, which is a specific CORBA object that can intercept and process any CORBA request using rules and actions that can be introduced to the knowledge base of the proxy during execution. To explore its design and operation, we have incorporated the generic proxy into ACT (Sadjadi and McKinley, 2004), an adaptive middleware framework we designed previously to support adaptation in CORBA applications. Details of the generic proxy are presented. A case study is described in which a generic proxy is used to support self-optimization in an existing image retrieval application, when executed in a heterogeneous wireless environment.

关键词： Middleware Communication system security computer networks Pervasive computing Wireless networks Military computing Intelligent networks Application software software engineering computer science

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Generation of self-optimizing wireless network applications

Generation of self-optimizing wireless network applications

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International Conference on Autonomic Computing (ICAC)

作者： S.M. Sadjadi P.K. McKinley R.E.K. Stirewalt B.H.C. Cheng Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI USA

Adaptable applications are difficult to develop and maintain especially if adaptive code, which implements the adaptive behavior, is tangled into functional code, which implements the imperative behavior. Our work investigates how to wrap existing applications transparently to generate such management components. Developing manageable components requires some mechanism to support adaptation in behavior. The predominant mechanism for implementing adaptation in object-oriented software is behavioral reflection, which can be used to modify how an object responds to a message. This work describes the application of TRAP/J to a multicast audio application. The audio-streaming application (ASA) is designed to deliver interactive audio from a microphone at one network node to multiple receiving nodes.

关键词： Wireless networks Reflection Application software Quality of service Adaptive coding Wireless LAN software engineering Laboratories computer science Environmental management

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Automated analysis of timing information in UML diagrams 04

Automated analysis of timing information in UML diagrams

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IEEE International Conference on Automated software engineering (ASE)

作者： S. Konrad L.A. Campbell B.H.C. Cheng Software Engineering and Network Systems Laboratory Department of Computer Science and Engineering Michigan State University East Lansing MI USA

ISBN: (纸本)9780769521312

This work introduces an approach to adding timing information to UML diagrams for modeling embedded systems. In order to perform automated formal analysis of these UML diagrams with timing information, we extend a previously developed UML formalization framework to provide Promela semantics for the timing elements of the UML diagrams. The paper describes the application of our approach to an electronically controlled steering system obtained from one of our industrial collaborators.

关键词： Information analysis Timing Unified modeling language Embedded system Performance analysis Automatic control Control systems Steering systems Electrical equipment industry Electronics industry

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A taxonomy of broadcast indexing schemes for multi channel data dissemination in mobile databases

A taxonomy of broadcast indexing schemes for multi channel d...

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International Conference on Advanced Information Networking and Applications (AINA)

作者： A.B. Waluyo B. Srinivasan D. Taniar School of Computer Science and Software Engineering Monash University Australia School of Business Systems Monash University Australia

Data broadcasting strategy is known as a scalable way to disseminate information to mobile users. However, with a very large set of broadcast items, the query access time of mobile clients raise accordingly, due to high waiting time for mobile clients to find their data of interest. One possible solution is to split the database information into several broadcast channels. In this paper, we introduce taxonomy of index dissemination for multibroadcast channel based on B* tree structure. We consider three indexing schemes namely: (i) nonreplicated indexing scheme (NRI), (ii) partially-replicated indexing scheme (PRI), and (iii) fully-replicated indexing scheme (FRI). Simulation model is developed to find out the access time performance of each scheme.

关键词： Taxonomy Broadcasting Indexing Databases Mobile computing Portable computers Batteries Energy consumption Switches computer science

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Constraint-guided dynamic reconfiguration in sensor networks

Constraint-guided dynamic reconfiguration in sensor networks

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International Symposium on Information Processing in Sensor Networks (IPSN)

作者： S. Kogekar S. Neema B. Eames X. Koutsoukos A. Ledeczi M. Maroti Institute for Software integrated Systems Department of Electrical Engineering and Computer Science Vanderbilt University Nashville TN USA

This work presents an approach for dynamic software reconfiguration in sensor networks. Our approach utilizes explicit models of the design space of the embedded application. The design space is captured by formally modeling all the software components, their interfaces, and their composition. System requirements are expressed as formal constraints on QoS parameters that are measured at runtime. Reconfiguration is performed by transitioning from one point of the operation space to another based on the constraints. We demonstrate our approach using simulation results for a simple sensor network that performs one-dimensional tracking.

关键词： Intelligent networks Runtime Power system modeling software design Algorithm design and analysis Permission Embedded software software systems Sensor systems Application software

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Utilising push and pull mechanism in wireless e-health environment

Utilising push and pull mechanism in wireless e-health envir...

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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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Principal flow for tubular objects with non-circular cross-sections

Principal flow for tubular objects with non-circular cross-s...

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International Conference on Pattern Recognition

作者： G. Baker N. Barnes Department of Computer Science & Software Engineering University of Melbourne VIC Australia Department of Computer Science & Software Engineering University of Melbourne Canberra VIC Australia Autonomous Systems and Sensing Technologies Programme NICTA Canberra Australia

Various anatomical objects are tubular in shape. These structures can be modeled by describing their curvilinear path and the cross-sectional shape along the path. However, most research on tubular object segmentation has focused on vascular systems, and often assumes a circular cross-section. These techniques are not readily applicable to anatomy such as the cochlea, which has a non-circular cross-sectional shape. We present the principal flow filter, which calculates the flow vector (tangential to the path) in a local region of a tubular object with a non-circular cross-section. It can be used to extract the centerline orientation and thus incrementally track along the tube. We present results from generated data with a variety of cross-sectional shapes. The filter is shown to rapidly and robustly converge to the true orientation. We also analyse a CT scan of a human cochlea, with promising results.

关键词： Shape Computed tomography Filters Data mining Object segmentation Humans Electrodes Principal component analysis computer science software engineering

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Configuring real-time aspects in component middleware

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On the Move to Meaningful Internet systems 2004: International Conference on Cooperative Information systems, CoopIS 2004, International Conference on Distributed Objects and Applications, DOA 2004 and International Conference on Ontologies, Databases and Applications of Semantics, ODBASE 2004

作者： Wang, Nanbor Gill, Chris Schmidt, Douglas C. Subramonian, Venkita Tech-X Corp Boulder United States Dept. of Computer Science and Engineering Washington University St. Louis United States Institute for Software Integrated Systems Vanderbilt University Nashville United States

ISBN: (纸本)3540236627

This paper makes two contributions to the study of configuring real-time aspects into quality of service (QoS)-enabled component middleware for distributed real-time and embedded (DRE) systems. First, it compares and contrasts the integration of real-time aspects into DRE systems using conventional QoS-enabled distributed object computing (DOC) middleware versus QoS-enabled component middleware. Second, it presents experiments that evaluate real-time aspects configuredin The ACE ORB (TAO) versus in the Component-Integrated ACE ORB (CIAO). Our results show that QoS-enabled componentmiddleware can offer real-time performance that is comparable to DOCmiddleware, while giving greater flexibility to compose and configure key DRE system aspects. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Quality of service

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Graphical representation of XML schema

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2004年 3007卷 234-245页

作者： Salim, Flora Dilys Price, Rosanne Indrawan, Maria Krishnaswamy, Shonali School of Computer Science and Software Engineering Monash University Vic. Australia School of Business Systems Monash University Vic. Australia

XML is becoming the de-facto standard for exchanging information in distributed applications and services. This has resulted in the development of a large number of XML documents with their associated schemas, such as DTD and XML Schema. A major challenge in using XML Schema is the difficulty in reading and understanding even a relatively small XML Schema because of its textual nature and its XML syntax. In this paper, we present transformations from textual XML Schema to graphical UML to facilitate understanding of XML Schema. Our transformation approach is unique in that we focus on all thirteen building blocks of XML Schema and is based on existing UML notation without introducing new stereotypes that would require additional user training. © Springer-Verlag Berlin Heidelberg 2004.

关键词： XML

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A component-based programming model for autonomic applications

A component-based programming model for autonomic applicatio...

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International Conference on Autonomic Computing (ICAC)

作者： Hua Liu M. Parashar S. Hariri The Applied Software Systems Laboratory Department of Electrical and Computer Engineering Rutgers University Piscataway NJ USA Department of Electrical and Computer Engineering University of Arizona Tucson AZ USA

The emergence of pervasive wide-area distributed computing environments, such as pervasive information systems and computational grids, has enabled new generations of applications that are based on seamless access, aggregation and interaction. However, the inherent complexity, heterogeneity and dynamism of these systems require a change in how the applications are developed and managed. In this paper we present a component-based programming framework to support the development of autonomic self-managed applications. The framework enables the development of autonomic components and the formulation of autonomic applications as the dynamic composition and management of autonomic components. The operation of the proposed framework is illustrated using a forest fire application.

关键词： Grid computing Distributed computing Pervasive computing Crisis management Application software Management information systems Mesh generation Disaster management Programming profession Fires

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