检索结果-内蒙古大学图书馆

Volume Visualization III: Polygonally Based Volume Rendering

computer in Physics 1993年第2期7卷 158-161页

作者： Robert S. Wolff Manager of Advanced Applications in Apple Computer's Advanced Technology Group.

Robert S. Wolff; Volume Visualization III: Polygonally Based Volume Rendering, computer in Physics, Volume 7, Issue 2, 1 March 1993, Pages 158–161, https://doi.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Performance studies of digital video in a client/server environment 3rd

Performance studies of digital video in a client/server envi...

引用

3rd International Workshop on Network and Operating System Support for Digital Audio and Video, 1992

作者： Nichols, Kathleen M. Advanced Technology Group Apple Computer Inc. One Infinite loop MS 301-4J CupertinoCA95014 United States

ISBN: (纸本)9783540571834

Networked multimedia services cover a wide spectrum of possible applications. One system architecture of interest is that of a fileserver delivering prerecorded digital movie clips for continuous time playback to clients. This problem is similar to that of delivery of real-time live video to clients, but is more forgiving in that some amount of the movie clip may be prebuffered at both fileserver and client to smooth out variations in the system. On the other hand, such a service requires fileservers capable of maintaining continuous streams of data, or their equivalent. The "fileserver delivering movie clips" is also at the heart of many proposed applications. Although, it is unlikely that all clients would be playing movie clips at once, it is important to understand how many simultaneously active clients a given network architecture can support. Delivery of stored digital video from a shared fileserver to remote clients is a systems architecture problem with many interacting components. Key items include the physical network, the network protocols, the architecture of both client and server, filesharing and operating system software, and the characteristics of the disk drives used in video storage. If components of the system are not well-matched, we would like to locate the bottleneck components, find how they interact in the system, and explore means of correcting the problem. This paper presents a study of a commercial system, apple’s QuickTime™ version 1.1, employed in a client/server environment. The measurements studies show clearly the pitfalls of a system that is "out of balance". Bottlenecks and upper bounds are identified, first a simple analytical model is employed to examine small improvements, then simulation is employed to further explore the space of possible system enhancements. © Springer-Verlag Berlin Heidelberg 1993.

关键词： Network architecture

来源：评论

学校读者我要写书评

暂无评论

Blind models as minimal artifacts 93

Blind models as minimal artifacts

引用

1993 Human-computer Interaction, INTERACT 1993 and IFIP TC13 International Conference on Human-computer Interaction, CHI 1993

作者： Mander, Richard Arent, Michael Human Interface Group Advanced Technology Apple Computer Inc. 20525 Mariani Ave. MS CupertinoCA301-3H United States

No abstract available.

ISBN: (纸本)0897915747

No abstract available.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A principled taxonomy of software visualization

引用

Journal of Visual Languages and Computing 1993年第3期4卷 211-266页

作者： Price, Blaine A. Baecker, Ronald M. Small, Ian S. Human Cognition Research Lab The Open University Milton Keynes MKZ6AA United Kingdom Dynamic Graphics Project CSRI University of Toronto Toronto ON M5S 1A1 Canada Advanced Technology Group Apple Computer Inc. Cupertino CA 95014 United States

In the early 1980s researchers began building systems to visualize computer programs and algorithms using newly emerging graphical workstation technology. After more than a decade of advances in interface technology, a large variety of systems has been built and many different aspects of the visualization process have been investigated. As in any new branch of a science, a taxonomy is required so that researchers can use a common language to discuss the merits of existing systems, classify new ones (to see if they really are new) and identify gaps which suggest promising areas for further development. Several authors have suggested taxonomies for these visualization systems, but they have been ad hoc and have relied on only a handful of characteristics to describe a large and diverse area of work. Another major drawback of these taxonomies is their inability to accommodate expansion: there is no clear way to add new categories when the need arises. In this paper we present a detailed taxonomy of systems for the visualization of computer software. This taxonomy was derived from an established black-box model of software and is composed of a hierarchy with six broad categories at the top and over 30 leaf-level nodes at four hierarchical levels. We describe 12 important systems in detail and apply the taxonomy to them in order to illustrate its features. After discussing each system in this context, we analyse its coverage of the categories and present a research agenda for future work in the area. © 1993 Academic Press, Inc.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Wide area information servers: An executive information system for unstructured files

引用

Internet Research 1992年第1期2卷 59-68页

作者： Kahle, Brewster Morris, Harry Davis, Franklin Tiene, Kevin Hart, Clare Palmer, Robin Project Leader for Wide Area Information Servers at Thinking Machines Corporation 245 First Street Cambridge MA Scientist on the Wide Area Information Servers WAIS project team Project manager in the Advanced Information Systems Group at Thinking Machines Computer scientist in the Advanced Technology Group at Apple Computer Inc. 20525 Mariani Blvd. Cupertino CA Special Projects Manager for Dow Jones Information Services' Advanced Systems Group 5918 Red Coat Lane West Bloomfield Ml Senior Manager at Peat Marwick 50 W. San Fernando Street Suite 1200 San Jose CA

In this paper we present a corporate information system for untrained users to search gigabytes of unformatted data using quasi-natural language and relevance feedback queries. The data can reside on distributed servers anywhere on a wide area network, giving the users access to personal, corporate, and published information from a single interface. Effective queries can be turned into profiles, allowing the system to automatically alert the user when new data are available. The system was tested by twenty executive users located in six cities. Our primary goal in building the system was to determine if the technology and infrastructure existed to make end-user searching of unstructured information profitable. We found that effective search and user interface technologies for end-users are available, but network technologies are still a limiting cost factor. As a result of the experiment, we are continuing the development of the system. This article will describe the overall system architecture, the implemented subset, and the lessons learned. © 1992, MCB UP Limited. All rights reserved.

关键词：

来源：评论

学校读者我要写书评

暂无评论

CONDOR: constraint-based dataflow 92

CONDOR: constraint-based dataflow

引用

Proceedings of the 19th annual conference on computer graphics and interactive techniques

作者： Michael Kass Apple Computer Advanced Technology Group 20525 Mariani Ave. Cupertino CA

来源：评论

学校读者我要写书评

暂无评论

SMDS measurements and modeling to predict performance

SMDS measurements and modeling to predict performance

引用

IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： S.H. Low K.M. Nichols EECS Department University of California Berkeley CA USA Advanced Technology Group Apple Computer Inc. Cupertino CA USA

The authors describe a performance study of a trial switched multimegabit data service (SMDS) link (intended for inter-LAN connection) from the perspective of customers evaluating the feasibility of the link for some target applications. The goals were to take all measurements on the customer premises and to develop a methodology general enough to be used by customers to evaluate the link. The authors measured a lightly loaded system and developed a model of the SMDS connection suitable for evaluating applications via analysis or simulation. They document their methodology and present the SMDS connection delay values as well as a likely breakdown of the constituents of that delay. They used these data to create a simulation model and to simulate a simple application. In the trial configuration, where geographical distances were small, SMDS network delay was one of the notable components of end-to-end delay in the SMDS connection. However, for most packets, throughput is limited by the T1 capacity for transmitting SMDS cells, not by the SMDS network capacity.< >

关键词： Predictive models Ethernet networks Switches Performance evaluation Condition monitoring Communication system traffic control Delay estimation Delay effects Analytical models Bandwidth

来源：评论

学校读者我要写书评

暂无评论

IMPROVING THE SHIP DESIGN, ACQUISITION AND CONSTRUCTION PROCESS

引用

NAVAL ENGINEERS JOURNAL 1992年第2期104卷 39-57页

作者： RYAN, JC JONS, OP J. Christopher Ryan:earned his bachelor's and master's degrees in Naval Architecture from Webb Institute and MIT respectively. He spent three years at the Advanced Marine Technology Division of Litton Industries working on the DD-963 class ship design and related computer aided design projects. he subsequently went to the Navy Department concentrating on early stage design of surface combatants for 12 years including work on the FFG-7 Sea Control Ship CSGN and CVV aircraft carrier projects. He then shifted focus and became the technical director for the Computer Supported Design Program in NavSea for five years. Mr. Ryan has served in several supervisory positions within the Ship Design Group in NavSea since that time. He is currently the project manager for the Ship Design Acquisition and Construction Process Improvement Project. Otto P. Jons:received a Diplom Ing. in shipbuilding from the Technical University of Hannover W. Germany and an M.S. in naval architecture and marine engineering from the Massachusetts Institute of Technology in 1967. He then joined Litton Ship Systems where he was responsible for the preliminary design of the DD-963 hull structure and then for ship systems as manager LHA Ship Systems Engineering Department. From 1972 to 1974 he was principal research scientist at Hydronautics. In 1976 as technical director he helped establish the local office of Designers and Planners. Otto Jons was one of the co-founders of Advanced Marine Enterprises Inc. in 1976 where he is corporate vice president engineering.

In the spring of 1990, the NavSea Chief Engineer initiated a project to improve the design, acquisition and construction (DAC) of U.S. Navy ships. The project's objectives are to reduce the time and cost of acquiring and operating Navy ships while improving their quality, unlike previous studies on the subject, the project utilizes a rigorous process analysis approach and attempts to use quantitative measures as the basis for recommending improvements. The paper is, of necessity, a status report on the progress of this project. Topics covered include: the DAC process;a look at the current state of ship acquisition time, cost, and quality;the methodology for process improvements;and early findings.

关键词： Naval Vessels

来源：评论

学校读者我要写书评

暂无评论

A GENERAL-PURPOSE FRAMEWORK FOR CAD ALGORITHMS

引用

IEEE COMMUNICATIONS MAGAZINE 1991年第5期29卷 56-62页

作者： RUBIN, SM Advanced Technology Group Apple Computer

The demands imposed by large circuits on computer-aided design (CAD) systems are discussed, showing how each can be met. In particular, it is shown how a CAD system can handle many tools, accommodation different design environments, provide a flexible interface, provide user-specified constraints, and be platform independent. A complete system, called the Electric VLSI Design System which exhibits all of these features is described.< >

关键词： Design automation Databases Algorithm design and analysis Integrated circuit synthesis Fabrication Costs Integrated circuit layout Computational geometry Bipolar integrated circuits Gallium arsenide

来源：评论

学校读者我要写书评

暂无评论

DESK-TOP MULTIMEDIA COMMUNICATIONS - BREAKING THE CHAINS

DESK-TOP MULTIMEDIA COMMUNICATIONS - BREAKING THE CHAINS

引用

INTERNATIONAL CONF ON COMMUNICATIONS ( ICC 91 )

作者： SAMMARTINO, F BLACKKETTER, D Advanced Technology Group Apple Computer Inc. United States

ISBN: (纸本)0780300068

Multimedia is the integration of information that may be represented by several media types. Currently much effort has been placed on using video, audio, animation and other temporal media together in a desktop computer. Desktop multimedia is achievable today, but only if it is confined to a single personal computer using direct connections to laser disks, CD-ROMs, and other multimedia data sources. In order to make multimedia data and services available to individuals connected via local and wide-area networks, special operating system hardware and software are needed. Special network management and services will be required to support bandwidth allocation, time (latency & synchronization) control, and data format conversion. The large bandwidths and real time characteristics of multimedia affect network requirements. In addition, support in operating system software, dedicated hardware, application interfaces, and new internal buses are required to extend media off of the desktop and into the network. © 1991 IEEE.

关键词： Personal computers

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：