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Conference Report: 1978 Summer Computer Simulation Conference

IP.com Disclosure Number: IPCOM000131250D
Original Publication Date: 1978-Oct-01
Included in the Prior Art Database: 2005-Nov-10
Document File: 8 page(s) / 32K

Publishing Venue

Software Patent Institute

Related People

Ware Myers: AUTHOR [+3]

Abstract

Simulation is a tool that is being used to extend the limits of the human mind in more and more professions. The expanding range of difficult problems to which it is now being applied is suggested by the Table 1 classification of papers presented at the 1978 Summer Computer Simulation Conference, held June 24-26 in Newport Beach, California. Even so, the entire range is not fully represented by the summer conference because it focuses on the simulation of continuous processes. The Winter Simulation Conference, which is also sponsored by the Society for Computer Simulation, emphasizes discrete processes.

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THIS DOCUMENT IS AN APPROXIMATE REPRESENTATION OF THE ORIGINAL.

This record contains textual material that is copyright ©; 1978 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Contact the IEEE Computer Society http://www.computer.org/ (714-821-8380) for copies of the complete work that was the source of this textual material and for all use beyond that as a record from the SPI Database.

Conference Report: 1978 Summer Computer Simulation Conference

Ware Myers

Computer staff

Simulation is a tool that is being used to extend the limits of the human mind in more and more professions. The expanding range of difficult problems to which it is now being applied is suggested by the Table 1 classification of papers presented at the 1978 Summer Computer Simulation Conference, held June 24-26 in Newport Beach, California. Even so, the entire range is not fully represented by the summer conference because it focuses on the simulation of continuous processes. The Winter Simulation Conference, which is also sponsored by the Society for Computer Simulation, emphasizes discrete processes.

Digital vs analog controversy reaches high ground

Simulation started out a generation ago in the design of aircraft with an analog computer to represent the

equations of motion. Then, as digital computers became larger and faster, they took over part of the simulation workload and extended the technique to new fields. Without attempting to recount the history of this controversy, suffice it to say that at this conference Electronic Associates, Inc., West Long Branch, New Jersey, seemed to be on the analog side, while Applied Dynamics International of Ann Arbor, Michigan, represented the digital side. In truth, however, both companies have reached the "high ground" of making extensive use of digital techniques in their products.

EIA Hyshare.

The larger company's latest product is the hybrid computer system diagrammed in Figure 1 (see May Computer, p. 92, for product announcement). The system bus of the 32-bit digital processor is extended to serve as the data communications/transfer medium for all digital elements of the

system. The 32 data lines and 24 address lines are bidirectional with transfers requiring 150 nanoseconds. Aggregate data rate for the bus is 26.67 megabytes per second, only 6.4 megabytes of which are required for maximum memory transfers. Digital units connected to the bus, in addition - to the CPU, memory, and peripherals, include a series of controllers which interface between the digital and analog domains.' The bus is time~multiplexed, permitting communication to the many digital units without overloading.

The parallel analog multiplexer transmits control instructions to as many as six analog computers. For example, one instruction causes the analog computers to enter the initial condition mode. When an analog computer completes a function, it transmits an interrupt to the CPU's real-time monitor via the i...