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International Symposium on Parallel and Distributed Processing (IPDPS)

作者： P.M. Miller A.R. Hurson Computer Engineering Program Department of Electrical and Computer Engineering Pennsylvania State University University Park PA USA

VLSI technology has created the opportunity for designers to develop special-purpose application-specific architectures based on associative processing techniques. However the diversity of these applications creates a need for a generalized methodology to quickly produce high-capacity associative chips with different functionalities. The paper introduces such a scheme for designing special-purpose content-addressable memories (CAMs). An overall CAM organization suitable for most special-purpose associative chips is presented and the design, layout, and performance of its modular components is discussed. An example CAM is examined to show the performance and area efficiency of CAMs designed using the proposed scheme. The paper also introduces an improved, highly compact theta -search associative cell. Finally, the testing of CAMs using this organization is discussed.< >

关键词： Testing computer aided manufacturing CADCAM Cams Random access memory Very large scale integration Application software Read-write memory Associative memory Logic

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FAULT TOLERANCE ANALYSIS OF THE CLASS OF REARRANGEABLE INTERCONNECTION NETWORKS

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JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING 1989年第1期7卷 148-164页

作者： PAKZAD, S Computer Engineering Program Department of Electrical Engineering The Pennsylvania State University University Park Pennsylvania 16802 USA

The issue of the fault tolerance of interconnection networks has received considerable attention since the last decade. The theoretical framework developed by J. P. Shen and J. P. Hays ( IEEE Trans. Comput. C-33 , 3 (Mar. 1984), 241–248) and extended by S. Pakzad and S. Lakshmivarahan ( Internat. J. Comput. Syst. Sci. Engrg. 3 , 2 (April 1988), 91–99) can be used as a guideline to analyze the fault tolerance behavior of the interconnection networks in a multicomputer environment. This paper analyzes the fault tolerance characteristics of a range of rearrangeable β-networks based on the concepts and the framework developed by S. Pakzad and S. Lakshmivarahan (cited earlier). These rearrangeable β-networks include the Benes network, the Waksman network, the Joel network, and the serial network. In addition, this paper presents a comparative analysis of the aforementioned networks according to their hardware cost, performance, and degree of fault tolerance.

关键词： computer Systems, Digital

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An analytical model for computing hypercube availability

An analytical model for computing hypercube availability

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International Symposium on Fault-Tolerant Computing (FTCS)

作者： C.R. Das J. Kim Computer Engineering Program De artment of Electrical Engineering Pennsylvania State University University Park PA USA

An analytical model is presented for computing the availability of an n-dimensional hypercube. The model computes the probability of j connected working nodes in a hypercube by multiplying two probabilistic terms. The first term is the probability of x connected nodes (x>or=j) working out of 2/sup n/ fully connected nodes. This is obtained from the numerical solution of the well-known machine repairman model, modified to capture imperfect coverage and imprecise repair. The second term, which is the probability of having j connected nodes in a hypercube, is computed from an approximate model of the hypercube. The approximate model, in turn, is based on a decomposition principle, where an n-cube connectivity is computed from a two-cube base model using a recursive equation. The availability model studied in this paper is known as task-based availability, where a system remains operational as long as a task can be executed on the system. Analytical results from n-dimensional cubes are given for various task requirements. The model is validated by comparing the analytical results with those from simulation.< >

关键词： Analytical models Hypercubes Availability Steady-state Packaging Equations Power system modeling Government Parallel architectures Performance analysis

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THE AEGIS DATA BUS EXPERIMENT

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NAVAL ENGINEERS JOURNAL 1989年第5期101卷 53-58页

作者： FRINK, JG VERVEN, DM John G. Frink is an assistant group supervisor in the Fleet Systems Department of The Johns Hopkins University Applied Physics Laboratory. He received his B.S. degree in physics from Michigan State University in 1968 and the M.S. degree in computer science from the University of Maryland in 1971. Mr. Frink worked at the Naval Surface Weapons Center White Oak Laboratory on a variety of weapons systems before joining the Applied Physics Laboratory in 1978. Mr. Frink has supervised the development of a large scale battle group simulation that successfully employs the receiver selection paradigm described herein on a hardware suite composed of an extensible number of (currently 15) processors. David M. Verven is a senior electrical engineer in the Fleet Systems Department of The Johns Hopkins University Applied Physics Laboratory. He received the B.S. degree in electrical engineering from the University of Maryland College Park in 1979 and the M. S. degree in the same discipline from The Johns Hopkins University in 1984. Mr. Verven joined the Applied Physics Laboratory in 1979 and initially worked on analysis of Navy sensor systems. In 1981 he was the AN/SPS-49 test team leader for the New Threat Upgrade (NTU) combat system land-based test. In 1982 he became involved in the development of the BBWRS system. Currently he is involved in real-time computer program development for the CEP project.

This paper documents an experiment performed by The Johns Hopkins University Applied Physics Laboratory to measure the effect of inserting a data bus into a combat system. The experiment was conducted at the Aegis computer Center located at the Naval Surface Weapons Center in Dahlgren, Virginia (NSWC/DL). The purpose of the experiment was to determine whether or not the Aegis Weapon System (the core of the Aegis Combat System) could be operated with a portion of its point-to-point interelement cables replaced by a data bus. The data bus chosen for the experiment employs message broadcasting with receiver selection. A primary goal of the experiment was to minimize the amount of Aegis computer program changes required to accommodate the data bus. The results presented in this paper will show that the experiment was a success. Key certification tests were passed with no computer program changes to the tactical elements and minimal changes in the Aegis tactical executive (ATES) program (less than 110 words changed).

关键词： Data Transmission Equipment

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Modification operations in data base machines: Where are they? 88

Modification operations in data base machines: Where are the...

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16th ACM Annual Conference on computer Science, CSC 1988

作者： Hurson, A.R. Miller, L.L. Department of Electrical Engineering Computer Engineering Program Pennsylvania State University University ParkPA16802 United States Department of Computer Science Iowa State University AmesIA50011 United States

ISBN: (纸本)0897912608

Advances in technology coupled with the inefficiency of the conventional von-Neumann type architecture in handling database systems have motivated the design and implementation of the so called database machines. Unfortunately, a majority of the proposed database machines have neglected to address proper procedures for modification operations. This negligence is partially due to the complexity of the operations and low performance of the database architectures in handling modification operations. First, the implementation of the modification operations in some database machines is overviewed. Second, we will address the mechanisms in which the relational database machine ASLM handles the modification operations. Finally, our approach is compared against the other proposed approaches in the literature. © 1988 ACM.

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A quadtree communication structure for fast data searching and distribution

A quadtree communication structure for fast data searching a...

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IEEE Annual International computer Software and Applications Conference (COMPSAC)

作者： W. Lin T.-L. Sheu C.R. Das Computer Engineering Program Department of Electrical Engineering Pennsylvania State University University Park PA USA

Presents a quadtree communication structure and two associated procedures for efficient, contention-free data searching and distribution on the BBN Butterfly parallel processor and its family. The proposed quadtree structure suggests a general approach to mapping a class of parallel algorithms with intensive communication requirements for performing two primitive operations: selecting data from many different sources and distributing data from a single source. While performing these two operations through the quadtree structure, the 'ascend' and 'descend' procedures incur no link conflicts in the Butterfly network. A concrete example of mapping the linear programming algorithm is given to show the effectiveness of the proposed quadtree communication structure.< >

关键词： Switches Linear programming Communication switching Hardware Concurrent computing Distributed computing Parallel algorithms Broadcasting Data engineering Merging

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Design and implementation of a distributed transaction processing system

Design and implementation of a distributed transaction proce...

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IEEE Compcon

作者： D.N. Mannai A.K. Elmagarmid Computer Engineering Program Electrical Engineering Department Pennsylvania State University University Park PA USA

The extension of the transaction concept to the distributed environment has introduced problems not present in centralized systems. Some of these new problems are due to the communication network, which has become the major speed limitation factor. This suggests that minimizing communication in distributed transactions is as crucial as minimizing disk access for centralized systems. A system for distributed transaction processing that reflects this concern is presented. A novel construct called 'execute' is used that allows the initiation and execution of a group of remote operations with one command.< >

关键词： Communication networks Transaction databases Distributed computing computer networks Communication system control Power engineering computing Reliability engineering Power engineering and energy Power system reliability Fault tolerant systems

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Evaluation of system BIST using computational performance measures

Evaluation of system BIST using computational performance me...

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IEEE International Test Conference

作者： D.L. Landis D.C. Muha Department of Electrical Engineering Computer Engineering Program Pennsylvania State University University Park PA USA

The impact of built-in self-test (BIST) techniques and system maintenance strategies on the performance of a VLSI processor system is examined. The specific BIST technique used was shown to have a significant influence upon instantaneous and cumulative system reward. It was shown that the additional overhead of the distributed and BILBO approaches is justified for this model when area utilization and cumulative area utilization are considered. For the assumed design parameters, the results presented allow a VLSI system designer to choose an optimal configuration based on system requirements and individual component parameters. The optimal performance will also depend on system and component parameters such as processor failure rates and fault coverage. These results are relevant to the design, evaluation, and optimization of highly reliable, high-performance digital processing systems.< >

关键词： Built-in self-test Circuit testing computer applications Fault tolerant systems Semiconductor device measurement Application software Circuit faults Fault detection Very large scale integration Area measurement

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When will we have true heterogeneous databases? 87

When will we have true heterogeneous databases?

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Proceedings of the 1987 Fall Joint computer Conference on Exploring technology: today and tomorrow

作者： A. K. Elmagarmid Computer Engineering Program 121 Electrical Engineering East Building The Pennsylvania State University University Park PA

ISBN: (纸本)9780818608117

A heterogeneous distributed database is a system of interconnected DBMSs that use different strategies for data and transaction management. Though issues such as universal query languages, and global view and schema integration have been investigated, transaction management issues introduced by the integration of separate database management systems into one global database have not been widely addressed in the *** most disturbing to me is the general misunderstanding in the database community as to what a heterogeneous database really is. Many people seem to refer to distributed databases as heterogeneous *** interest to me are questions relating to transaction support in the heterogeneous database environment. Two basic approaches are possible in order to integrate differing DBMS's. The first approach integrates transaction management policies into one global transaction manager that handles subtransactions accessing the heterogeneous database. The second is based on hierarchical composition of transaction management policies. In the latter approach, software is added on top of existing systems whenever needed (Gligor and Luckenbaugh, Interconnecting Heterogeneous Database Management Systems, IEEE computer January 1984).The heterogeneous database research group at Penn State consists of three students along with myself. We are looking at concurrency control (Y. Leu), recovery (D. Mannai), and deadlock issues (I. Mahgoub). In this panel I would like to discuss the following set of related questions:Which of the problems are due to DBMS integration and not due to heterogeneity?How is the consistency of heterogeneous databases defined?How does serializability apply to heterogeneous databases?How strict must the definition of database autonomy be? How does it complicate transaction management issues?How important are atomic updates in this environment? How often are they expected?Are we likely to have generalized solutions to the problem of co

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Abstracts

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Environmental Management 1977年第1期1卷 67-96页

作者： Frankenfeld, John W. Schulz, Wolfgang McMurty, George J. Petersen, Gary W. May, G. A. Hering, F. S. Schwartz, J. I. Heywood, J. B. Chigier, N. A. Grohse, E. W. Walker, J. D. Colwell, R. R. Petrakis, L. Pergament, H. S. Thorpe, R. D. Schoepf, Richard W. Krzyczkowski, Roman Henneman, Suzanne S. Hudson, Charles L. Putnam, Evelyn S. Thiesen, Donna J. parks, G. A. McCarty, Perry L. Leckie, J. O. Schrumpf, Barry J. Simonson, G. H. Paine, D. P. Lawrence, R. D. Pyott, W. T. Leh, M. Elders, W. Combs, J. Caplen, T. Harrison, F. L. Wong, K. M. Heft., R. E. Charnell, Robert L. Lehmann, Edward J. Mallon, Lawrence G. Hatfield, Cecile Adams, Gerald H. Johanning, James Talvitie, Antti Noll, Kenneth E. Miller, Terry Smiarowski, Joseph F. Willis, Cleve E. Foster, John H. Schlesinger, Benjamin Daetz, Douglas Lear, Donald U. Smith, Mona F. Hundemann, Audrey S. Crockett, Pernell W. Werner, Kirk G. Carroll, Thomas E. Maase, David L. Genco, Joseph E. Ifeadi, Christopher N. Lowman, F. G. Christensen, S. W. Van Winkle, W. Mattice, J. S. Harrison, Elizabeth A. Barker, James C. Chesness, Jerry L. Smith, Ralph E. Shaheeen, Donald G. Raney, R. Keith Borton, T. Wezernak, C. T. Raney, R. K. Sherwani, Jabbor K. Moreau, David H. Eisenberg, Norman A. Lynch, Cornelius J. Breeding, Roger J. Johnson, J. D. Foster, K. E. Mouat, D. A. Clark, R. Hyden, John William Owen, Wilfred Bayfield, Neil G. Barrow, Graham C. Stolz, Stephanie B. Wienckowski, Louis A. Brown, Betram S. Keyfitz, Nathan Wilson, W. L. Newman, Peter W. G. Bammi, Deepak Bammi, Dalip Goddard, James E. Chisholm, Tony Walsh, Cliff Brennan, Geoffrey Thompson, K. S. Richardson, R. Jensen, Clayton E. Brown, Dail W. Mirabito, John A. Cowing, Thomas G. Binghamton, Suny Siehl, George H. Albrecht, O. W. Alexander, Ariel Barde, Jean -Philippe Darby, William P. McMichael, Francis Clay Dunlap, Robert W. Muckleston, Keith W. Frankenhoff, Charles A. Giulini, Lorenzo T. Wyatt, T. Black, Peter E. Keating, William Thomas Leonard, M. E. Fisher, E. L. Brunelle, M. F. Dickinson, J. E. Pethig, Rudiger Clapham Exxon Research & Engineering Co. Linden Government Research Lab Coast Guard Washington D.C. Department of Transportation Washington D.C. Office For Remote Sensing of Earth Resources. NASA Earth Resources Survey Program Pennsylvania State University Washington D.C. Department of the Navy Washington D.C. Cambridge. Dept. of Mechanical Engineering Massachusetts Inst. of Technology USA Huntsville. School of Graduate Studies and Research Alabama Univ. USA Dept. of Microbiology. Office of Naval Research Maryland Univ. Arlington Research and Development Co. Pittsburgh AeroChem Research Labs. Inc. Princeton Dept. of the Interior Office of Library Services. Bibliographic Series (Final) Washington D.C. Interplan Corp. Santa Barbara Urban Mass Transportation Adm. Washington D.C. Naval Underwater Systems Center Newport Calif. Mercury Project. National Science Found Stanford Univ Washington D.C. Div. of Advanced Environmental Research & Tech. USA Corvallis. NASA Earth Resources Survey Program Oregon State Univ. Washington D.C. Riverside. Inst. of Geophysics and Planetary Physics National Science Foundation California Univ. Washington D.C. Livermore Lawrence Livermore Lab. California Univ. USA Atlantic Oceanographic and Meteorological Labs. National Oceanic and Atmospheric Administration Miami National Technical Information Service Springfield Miami Univ. Coral Gables School of Law National Oceanic and Atmospheric Administration Rockville National Academy of Sciences Office of Sea Grant Washington D. C. School of Law National Oceanic and Atmospheric Administration Office of Sea Grant. Rockville Norman. Dept. of Civil Engineering and Environmental Science. Urban Mass Transportation Administration Oklahoma Univ. Washington D. C. Knoxville.Dept. of Civil Engineering. Federal Highway Administration Tennessee Univ. Washington D. C. Amherst.Water Resources Research Center. Office of Water Research and Technology Massachusetts Univ. Washington D. C. Calif. Dept. of Industria

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