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International Symposium on object-oriented Real-Time Distributed Computing

作者： F. Schon W. Schroder-Preikschat O. Spinczyk U. Spinczyk German Nat. Res. Center for Inf. Technol. Berlin Germany GMD-German National Research Center of Information Technology Berlin Germany

A crucial aspect in the design of (embedded real-time) operating systems concerns interrupt handling. This paper presents the concept of a modularized interrupt-handling subsystem that enables the synchronization of interrupt-driven, non-sequential code without the need to disabling hardware interrupts. The basic idea is to use nonblocking/optimistic concurrency sequences for synchronization inside an operating-system kernel. Originally designed for the PURE embedded operating system, the presented object-oriented implementation is highly portable not only regarding the CPU but also operating systems and yet efficient.

关键词： Operating systems Synchronization Concurrent computing Kernel Pipelines Information technology object oriented modeling Hardware Delay Real time systems

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Deadline handling in real-time distributed objects

Deadline handling in real-time distributed objects

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International Symposium on object-oriented Real-Time Distributed Computing

作者： K.H. Kim Juqiang Liu Moon-Hae Kim University of California Irvine CA USA University of California Irvine Irvine CA US

Deadline handling is a fundamental part of real-time computing but has been practiced in ad hoc forms for decades. A general framework for systematic deadline handling in real-time distributed computer systems is proposed in this paper. The notions of hard deadlines and hard-real-time program components are discussed along with the advantages of a hard-real-time component based construction approach. To present approaches for implementation of systematic deadline handling in concrete forms, we use the time-triggered message triggered object (TMO) network structuring as the basic design framework in which deadline handling approaches are incorporated. The TMO structuring scheme is a general-style component structuring scheme and supports design of all types of components including hard-real-time objects and non-real-time objects within one general structure. An augmentation of the TMO structure with statistical performance indicators is also proposed.

关键词： Distributed computing Real time systems Concrete Timing systems engineering and theory object oriented modeling Fault tolerant systems Costs Power generation economics Economic forecasting

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An approach to a synthesis of formal and visual description techniques for the development of real-time reactive systems

An approach to a synthesis of formal and visual description ...

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IEEE International Conference on Embedded and Real-Time Computing systems and Applications (RTCSA)

作者： D. Muthiayen V.S. Alagar F. Khendek A. Sefidcon Department of Computer Science Concordia University Montreal QUE Canada Department of Electrical and Computer Engineering Concordia University Montreal QUE Canada

The paper presents notations for modeling real time reactive systems at different abstraction levels and provides mappings between these levels. The wide acceptance of UML in industry, as a unified notation applicable to the development of object based systems in a broad spectrum of domains, and the use of SDL for design analysis and verification in large scale applications have motivated us to use them respectively for user level modeling and at the implementation level. The object oriented notation Timed Reactive object Model (TROM) provides the semantic basis for adapting UML to model real time reactive systems. Mechanical translations have been developed from UML to TROM and from TROM to SDL.

关键词： object oriented modeling Unified modeling language Real time systems Computer science Large-scale systems Process control Aerospace electronics Time factors Computer industry Computer interfaces

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Simulation of hardware support for OpenGL graphics architecture

Simulation of hardware support for OpenGL graphics architect...

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International Conference on Information Technology: Coding and Computing (ITCC)

作者： T. Paltashev N. Govind G. Abla Department of Electrical and Computer Engineering SD School of Mines and Technology Computing Enhancement Architecture Laboratory Intel Corporation

The growing number of applications for 3D graphics and imaging systems in the mass market requires the customized approach to the design of high-performance 3D graphics and imaging system architectures. That fact coupled with the strong trends to industrial standardization of graphics API, such as OpenGL, leads to enhanced portability for imaging and graphics applications. The progress on the hardware support of API functionality gives a real possibility to use a top-down approach in the design of custom graphics/imaging systems based on the mixed hardware/software implementation of the OpenGL architecture. Software simulation is a relatively cheap and fast way for initial graphics architecture template development and evaluation to acquire the structure and parameters that can be used later for HDL elaboration and simulation. This paper discusses a 3D graphics and imaging system architecture model implementation based on OpenGL API hardware support simulation. The object-oriented approach has been used for this development of analytic and software models simulating hardware units on different stages of the graphics pipeline. The Interactive Imaging System Architecture Composer has been developed in this project for fast run-time simulation management, data acquisition and interpretation. The expandable set of architecture templates uses a reconfigurable shared library of "virtual hardware units" simulating the different hardware structures for graphics and image processing.

关键词： Graphics object oriented modeling Computer architecture Standardization Application software Hardware design languages Analytical models Pipelines Runtime Project management

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Developing Flexible and High-performance Web Servers with Frameworks and Patterns

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ACM Computing Surveys 2000年第1期32卷 39-39页

作者： Schmidt, Douglas C. Hu, James C. UC Irvine Department of Electrical & Computer Engineering Irvine CA 92697-2625 616E Engineering Tower United States

The goal of this paper is to illustrate how frameworks and patterns address complexities that arise in the design and implementation of high-performance distributed software systems. These complexities are both inherent (e.g., latency reduction and throughput preservation), and accidental (e.g., the continuous reinvention of key concepts and components). This paper explains how complexities occurring in the development of high-performance Web servers can be alleviated with the use of design patterns and object-oriented application frameworks. These techniques were applied to the development our high-performance adaptive Web server framework, JAWS. JAWS exemplifies how a framework can remain flexible without sacrificing performance. © 2000, ACM. All rights reserved.

关键词： design patterns distributed software systems object-oriented application frameworks WWW

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Platforms for agent-oriented software engineering

Platforms for agent-oriented software engineering

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Asia-Pacific Conference on Software Engineering

作者： M. Nowostawski G. Bush M. Purvis S. Cranefield Department of Information Science University of Otago Dunedin New Zealand

The use of modelling abstractions to map from items in the real-world to objects in the computational domain is useful both for the effective implementation of abstract problem solutions and for the management of software complexity. This paper discusses the new approach of agent-oriented software engineering (AOSE), which uses the notion of an autonomous agent as its fundamental modelling abstraction. For the AOSE approach to be fully exploited, software engineers must be able to gain leverage from an agent software architecture and framework, and there are several such frameworks now publicly available. At the present time however there is little information concerning the options that are available and what needs to be considered when choosing or developing an agent framework. We consider three different agent software architectures that are (or will be) publicly available and evaluate some of the design and architectural differences and trade-offs that are associated with them and their impact on agent-oriented software development. Our discussion examines these frameworks in the context of an example in the area of distributed information systems.

关键词： Software engineering object oriented modeling Software architecture Autonomous agents Programming Distributed information systems Computer architecture Telecommunications Information science Hardware

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UML distilled : a brief guide to the standard object modeling language

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2000年

作者： Fowler Martin 1963-

ISBN: (纸本)020165783X

Now widely adopted as the de facto industry standard and sanctioned by the object Management Group, the Unified Modeling Language (UML) is a notation all software developers need to know and understand. However, the UML is a big language, and not all of it is equally important. The award-winning first edition of UML Distilled was widely praised for being a concise guide to the core parts of the UML and has proved extremely successful in helping developers get up and running quickly. UML Distilled, Second Edition, maintains the concise format with significantly updated coverage of use cases and activity diagrams, and expanded coverage of collaborations. It also includes a new appendix detailing the changes between UML *** for those with a basic understanding of object-oriented analysis and design, this book begins with a summary of UML's history, development, and rationale and then moves into a discussion of how the UML can be integrated into the object-oriented development process. The primary author profiles the various modeling techniques in the UML--such as use cases, class diagrams, and interaction diagrams--and describes the notation and semantics clearly and succinctly. He also outlines useful non-UML techniques such as CRC cards and patterns. These descriptions are made even more relevant with a collection of best practices based on the primary author's experience and a brief Java programming example demonstrating the implementation of a UML-based design. With this tour of the key parts of the UML, readers will be left with a firm foundation upon which to build models and develop further knowledge of the Unified Modeling *** for the First Edition"UML Distilled is a recipient of the prestigious 1997 Software Development Magazine Productivity Award in the Books category. Addison-Wesley congratulates authors Martin Fowler and Kendall Scott for their outstanding work.""UML Distilled is well written, knowledgeable about both systems develo

关键词： object-oriented methods (Computer science) Computer software Development. UML (Computer science)

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基于可执行对象模型的通信系统软件开发过程

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武汉测绘科技大学学报 2000年第4期25卷 368-373页

作者：边学工胡瑞敏喻占武李德仁武汉测绘科技大学多媒体网络通信工程研究所武汉市珞喻路129号430079 武汉测绘科技大学校长办公室武汉市珞喻路129号430079

讨论了使用可执行对象模型开发通信系统的相关概念、方法和技术 ,提出了一个利用可执行对象模型进行通信系统开发的过程 ,以提高通信软件质量 ,缩短开发周期。

关键词：通信系统可执行对象模型软件过程

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Introduction to algorithms and problem solving

Introduction to algorithms and problem solving

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Frontiers in Education (FIE) Conference

作者： M.L. Nelson D. Rice School of Advancing Computer Information Technology International College Fort Myers FL USA

Language and paradigm choice for teaching computer programming is an on-going debate. We have been using Visual Basic for the introductory course and C++ for the advanced course. Unfortunately, many of our students struggle in the introductory course. We are currently re-engineering our degree. While our introductory course should ideally be language-independent, we feel that students will gain a better understanding if their algorithms are executable. Therefore, we have decided to use the procedural paradigm, with C++ as the implementation language for this course.

关键词： Problem-solving Visual BASIC Visual databases Programming Education Algorithm design and analysis object oriented databases Educational institutions Information systems Computational Intelligence Society

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An object oriented approach to web-based applications design

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Theory and Practice of object systems 2000年第4期4卷

作者： Daniel Schwabe Gustavo Rossi Departamento de Informática. PUC-RIO Brazil LIFIA Fac Cs. Exactas UNLP CONICET UNLM Argentina

In this paper we discuss the use of an object-oriented approach for web-based applications design, based on a method named object-oriented Hypermedia design Method (OOHDM). We first motivate our work discussing the problems encountered while designing large scale, dynamic web-based applications, which combine complex navigation patterns with sophisticated computational behavior. We argue that a method providing systematic guidance to design is needed. Next, we introduce OOHDM, describing its main activities, namely: conceptual design, navigational design, abstract interface design and implementation, and discuss how OOHDM designs can be implemented in the WWW. Finally, related work and future research in this area are further discussed. © 1998 John Wiley & Sons, Inc.

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