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The OORHS: a conceptual framework that provides easy and reversible distributed programming

COMPUTER SYSTEMS SCIENCE AND ENGINEERING 1998年第5期13卷 289-301页

作者： Yeung, DS Wong, AKY Hong Kong Polytech Univ Dept Comp Kowloon Peoples R China

In the proposed OORHS (object-oriented reciprocal hypercomputing system) conceptual framework, the user provides only a highlevel APPL program, which is, in effect, a specification. With this specification, the system automatically performs all the necessary distributed computing steps: (a) precompile, transform and then normalize the specification into its compilable form, (b) construct a program descriptor to represent the running parallel program. (c) distribute the program objects of the parallel program for the local compilation process, and (d) capture the dynamic behaviour of a running program by its program descriptor. program visualization, which is based on the contents of the program descriptors, is an integral part of the OORHS, The user can choose to monitor and debug any running APPL program in the system via the interface of the program visualizer. Invoking the program visualizer is the first step of the reversible programming process in the OORHS framework. Preliminary experience with the OORHS prototype shows that distributed programming in this framework is simple and straightforward.

关键词： precompilation transformation normalization local compilation program visualization and reversible programming

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JCAT: Collaborative active textbooks using Java

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COMPUTER NETWORKS AND ISDN SYSTEMS 1997年第14期29卷 1577-1586页

作者： Brown, MH Raisamo, R UNIV TAMPERE DEPT COMP SCIFIN-33101 TAMPEREFINLAND DEC SYST RES CTR PALO ALTOCA 94301

This paper describes JCAT, a Java-based system for building Web-based collaborative active textbooks on algorithms. JCAT augments the expressive power of Web pages for publishing passive multimedia information with a full-fledged interactive algorithm animation system. The system is built in such a way that views of a running program may reside on different machines, thereby making JCAT particularly well-suited for electronic classrooms. In such a setting, an instructor controls the animation, while students view the animation by painting their Web browsers at the appropriate page. (C) 1997 Elsevier Science B.V.

关键词： algorithm animation program visualization BALSA Java electronic textbooks electronic classrooms applets remote objects

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Visual debugging of data and operations for concurrent programs

Visual debugging of data and operations for concurrent progr...

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Conference on Visual Data Exploration and Analysis IV

作者： Erbacher, RF Univ. of Massachusetts/Lowell (United States)

ISBN: (纸本)0819424285

Symmetric multiprocessor systems (SMPs) are the desktop systems of the future. As they become more widely used, application developers will need to make better use of them. Merely providing threading will be insufficient. Companies will need to provide applications that parallelize portions of code and use the processors in SMPs To their full extent. This will have a much more dramatic effect on improving performance. Before this can be achieved however, tools must be developed which aid programmers, who may have little or no experience in programming parallel systems, to debug and performance tune their applications. Our goal is to improve the technology available through interactive computational steering and to develop techniques that will be valuable for all types of concurrent systems not just SMPs. This will be done through integrated operation visualization, data highlighting, interactive computational steering, and by concentrating an the data in a parallel system rather than on the processors or code.

关键词： visualization interactive computational steering program visualization concurrent systems

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Using visualization for architectural localization and extraction

Using visualization for architectural localization and extra...

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4th Working Conference on Reverse Engineering

作者： Jerding, D Rugaber, S Georgia Inst of Technology Atlanta United States

ISBN: (纸本)0818681624

Understanding the architecture of a program requires determining both the major components into which the system is broken and the ways in which the components interact to accomplish the program's goals. Both static and dynamic analyses of the software can aid in obtaining this understanding. This paper describes an analysis technique Sor gaining such understanding and a visualization tool, called ISVis, that supports it. The technique is applied to The problem of enhancing the Mosaic web browser by both visualizing its architecture and finding the components of the browser into which an enhancement should be inserted.

关键词： software architecture extraction program visualization dynamic analysis program understanding

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A Prototypical 3D Graphical Visualizer for Object-Oriented Systems

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Journal of Computer Science & Technology 1996年第5期11卷 489-496页

作者：华庆一董诚 Integrated Publication and Information Systems Institute (IPSI) German National Research Center for Computer Science (GMD) Darmstadt F.R. Germany

This paper describes a framework for visualizing object-oriented systems within a 3D interactive environment. The 3D visualizer represents the structure of a program as Cylinder Net that simultaneously specifies two relationships between objects within 3D virtual space. Additionally it represents additional relationships on demand when objects are moved into local focus. The 3D visualizer is implemented using a 3D graphics toolkit, TOAST, that implements 3D widgets and 3D graphics to ease the programming task for 3D visualization.

关键词： Object-oriented system program visualization 3D graphics

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A TAXONOMY OF program visualization SYSTEMS

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COMPUTER 1993年第12期26卷 11-24页

作者： ROMAN, GC COX, KC Dept. of Comput. Sci. Washington Univ. St. Louis MO

Pictorial representations of program structure, control flow, and data have always been part of the programmer's repertoire of tools and techniques. Such representations can simplify and enhance the explanation of specific aspects of a program. Now that workstations are equipped with powerful graphics capabilities, interest has shifted from simple, static representations to dynamic representations of program behavior. Generating and using graphical program representations has become a recognized scientific endeavor called program visualization. This field is attracting considerable attention from researchers who hope to put their results to practical use in areas as diverse as software design, performance monitoring, and soft-ware training. However, a significant gap exists between program visualization research and its practical application to programming environments and design tools. To remedy this situation, the authors present a taxonomy of program visualization systems (excluding related work in visual programming and scientific visualization). The authors illustrate the taxonomy with three program visualization systems representative of research trends: Zeus, Tango, and Pavane. They represent examples of their taxonomic criteria, generating color images by using Pavane, except as noted.

关键词： Pavane Tango Zeus data visualisation graphical representations program visualization programming environments taxonomy visual programming

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A PROCEDURAL INTERFACE FOR program DIRECTING

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SOFTWARE-PRACTICE & EXPERIENCE 1995年第7期25卷 767-787页

作者： SOSIC, R School of Computing and Information Technology Griffith University Nathan Queensland 4111 Australia

Debugging and performance measurement tools are becoming more important in the development and maintenance of increasingly complex software, These tools belong to a class of programs, called directors, Directors are programs that monitor and control other programs, Through monitoring, directors analyze program execution at runtime, Monitoring provides tracing primitives as well as access to program's variables, dynamic data structures, and its internal state, Results of the monitoring analysis can be used by the director itself to change the future program behavior or presented to a human user for an interactive review and possible feedback actions. The future program behavior is changed through controlling primitives which provide an organized way to modify data values as well as the program code. This paper presents a library of directing commands which enable the construction of powerful directors, The interface has been implemented in a Unix environment as a runtime subsystem running in the directed program's address space, The paper provides the description of the interface and the basic programming techniques in building directors, Examples of novel applications, illustrating the use of the directing interface, are demonstrated by the directors for the visualization of program control and structured snapshots.

关键词： DEBUGGING DIRECTING MONITORING PROCEDURAL INTERFACE program visualization

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Guiding Data Analysts With Visual Statistical Strategies

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Journal of Computational and Graphical Statistics 1995年第4期4卷 229-250页

作者： Young, Forrest W. Lubinsky, David J. Psychometric Laboratory University of North Carolina Chapel Hill NC United States Department of Computer Science University of Witwatersrand Johannesburg South Africa

The concept of statistical strategy is introduced and used to develop a structured graphical user interface for guiding data analysis. The interface visually represents statistical strategies that are designed by expert data analysts to guide novices. The representation is an abstraction of the expert’s concepts of the essence of a data analysis. We argue that an environment that visually guides and structures data analysis will improve data analysis productivity, accuracy, accessibility, and satisfaction in comparison to an environment without such aids, especially for novice data analysts. Our concepts are based on notions from cognitive science, and can be empirically evaluated. The interface consists of two interacting windows—the guidemap and the workmap. Each window contains a graph that has nodes and edges. The guidemap graph represents the statistical strategy for a specific statistical task (such as describing data). Nodes represent potential data analysis actions that can be taken by the system. Edges represent potential actions that can be taken by the analyst. The guidemap graph exists prior to the data analysis session, having been created by an expert. The workmap graph represents the complete history of all steps taken by the data analyst. It is constructed during the data analysis session as a result of the analyst’s actions. Workmap nodes represent data sets, data models, or data analysis procedures that have been created or used by the analyst. Workmap edges represent the chronological sequence of the analyst’s actions. One workmap node is highlighted to indicate which statistical object is the focus of the strategy. We illustrate our concepts with ViSta, the Visual Statistics system that we have developed. © 1995 Taylor and Francis Group, LLC.

关键词： Artificial intelligence Cognitive science Hypertext Lisp-Stat program visualization Statistical system design ViSta Visual programming

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A FRAMEWORK FOR EXECUTION MONITORING IN ICON

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SOFTWARE-PRACTICE & EXPERIENCE 1994年第11期24卷 1025-1049页

作者： JEFFERY, CL GRISWOLD, RE UNIV ARIZONA DEPT COMP SCITUCSONAZ 85721

Execution monitors are widely used during software development for tasks that require an understanding of program behavior, such as debugging and profiling. The Icon programming language has been enhanced with a framework that supports execution monitoring. Under the enhanced translator and interpreter, neither source modification nor any special compiler command-line option is required in order to monitor an Icon program, Execution monitors are written in the source language, instead of the implementation language. Performance, portability, and detailed access to the monitored program's state are achieved using a coroutine model and dynamic loading rather than the separate-process model employed by many conventional monitoring systems.

关键词： EXECUTION MONITORS programMING LANGUAGES INTERPRETERS COROUTINES program visualization program BEHAVIOR

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Algorithm animation using 3D interactive graphics 93

Algorithm animation using 3D interactive graphics

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Proceedings of the 6th Annual Symposium on User Interface Software and Technology

作者： Brown, Marc H. Najork, Marc A. Systems Research Center Digital Equipment Corporation 130 Lytton Ave. Palo Alto CA Digital Equipment Corporation Palo Alto CA

ISBN: (纸本)089791628X

This paper describes a variety of 3D interactive graphics techniques for visualizing programs. The third dimension provides an extra degree of freedom for conveying information, much as color adds to black-and-white images, animation adds to static images, and sound adds to silent animations. The examples in this paper illustrate three fundamental uses of 3D: for providing additional information about objects that are intrinsically two-dimensional, for uniting multiple views, and for capturing a history of execution. The application of dynamic three-dimensional graphics to program visualization is largely unexplored.

关键词： program visualization 3D graphics information visualization algorithm animation

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