{"title":"A transfluxor analog memory using frequency modulation","authors":"W. Karplus, J. A. Howard","doi":"10.1145/1464052.1464117","DOIUrl":"https://doi.org/10.1145/1464052.1464117","url":null,"abstract":"The accurate storage of a continuous voltage has always proven to be a difficult and challenging problem to the designers of electronic analog systems. Most modern analog computer installations include a number of \"sample-hold\" devices, utilizing high-quality operational amplifiers in combination with special electronic switching circuitry. In such units the voltage is stored as charge on a capacitor, so that leakage and grid currents must be extremely carefully controlled to permit long-time storage with high accuracy. Recently introduced hybrid computer systems have placed an additional requirement upon the analog memory unit: economy. For example, in the discrete-space-discrete-time hybrid computer system now under development at UCLA, 1,000 sample-hold circuits will be required in order to accommodate 1,000 parallel digital-analog channels. Furthermore, hold times of several minutes are desired. Under these conditions conventional capacitor-type analog memories become economically unfeasible. These considerations have stimulated a search for a rapid, accurate and economic analog memory and have resulted in the development of the FM-transfluxor unit described in this paper. Since their introduction by Rajchman in 1955, multiaperture magnetic devices (MAD) have assumed an important place as magnetic logic and memory devices in digital computer applications. The extension of this technique to analog systems has been proposed from time to time, but no fully satisfactory transfluxor analog memory has been described to date.","PeriodicalId":126790,"journal":{"name":"AFIPS '64 (Fall, part I)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125482706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The compilation of natural language text into teaching machine programs","authors":"L. Uhr","doi":"10.1145/1464052.1464056","DOIUrl":"https://doi.org/10.1145/1464052.1464056","url":null,"abstract":"Programmed instruction, via digital computers, must be made as painless as possible, both in the writing and the changing of programs, for the author of the programmed text. Otherwise we will only slowly accumulate a body of expensive programs that we will never succeed in testing adequately. It is crucial, given that we are investigating programmed instruction at all, that it become easy to write and rewrite the programs.","PeriodicalId":126790,"journal":{"name":"AFIPS '64 (Fall, part I)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116248877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The 4102-s space track program","authors":"E. Garner, J. Oseas","doi":"10.1145/1464052.1464100","DOIUrl":"https://doi.org/10.1145/1464052.1464100","url":null,"abstract":"There are five functions which the <u>SPA</u>ce <u>T</u>rack <u>SE</u>nsor <u>C</u>omputer (SPASEC) real time program performs as part of an effective satellite surveillance system. It locates new satellites soon after launching; keeps up to date records of known satellite orbits; provides positional data of high accuracy for use by other systems; provides information on object size, shape and stability; indicates orbital change. The radar associated with this system can operate in both a surveillance mode to provide data on orbiting objects passing through the volume scanned or in a tracking mode to provide more accurate orbital data on observed objects. The computer program senses, identifies and discriminates among the objects penetrating the surveillance volume and then gathers the required data. This information then undergoes evaluation and the results are forwarded to the Spacetrack Center for additional analysis and correlation.","PeriodicalId":126790,"journal":{"name":"AFIPS '64 (Fall, part I)","volume":"42 11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125749812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The use of a job shop simulator in the generation of production schedules","authors":"D. R. Trilling","doi":"10.1145/1464052.1464074","DOIUrl":"https://doi.org/10.1145/1464052.1464074","url":null,"abstract":"The following describes some techniques under development at the Steam Division of the Westinghouse Electric Corporation. This plant, located at Lester, Pennsylvania, manufactures large Steam Turbines, and its main facility is an exceptionally large job shop. It is the locale where many of the concepts discussed below underwent development. However, it should be made clear that this paper is not in any way intended to be a progress report on their use there. The nature of these techniques remains highly experimental, and they are described here as a matter of interest to those who are concerned with the potential of computers in management applications.","PeriodicalId":126790,"journal":{"name":"AFIPS '64 (Fall, part I)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132613747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The IBM Hypertape system","authors":"B. Cunningham","doi":"10.1145/1464052.1464089","DOIUrl":"https://doi.org/10.1145/1464052.1464089","url":null,"abstract":"The IBM Hypertape system was designed as a high-speed I/O device for the IBM 7074-7080-7090-7094 computers. It is composed of a two-channel control unit, the IBM 7640 (Figure 1), and IBM 7340 tape drives (Figure 2). Ten 7340s can be attached to each 7640 channel.","PeriodicalId":126790,"journal":{"name":"AFIPS '64 (Fall, part I)","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122741477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Progress of hybrid computation at United Aircraft Research Laboratories","authors":"G. Paquette","doi":"10.1145/1464052.1464119","DOIUrl":"https://doi.org/10.1145/1464052.1464119","url":null,"abstract":"Many of the present day simulation problems utilizing analog equipment exclusively require large, expensive computing facilities. The non-linear calculations involved in modern simulations require a large portion of the all analog system. Increase in operation speed and reliability coupled with reduction in purchase cost have made the digital computer desirable for these nonlinear computations.","PeriodicalId":126790,"journal":{"name":"AFIPS '64 (Fall, part I)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1899-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123662069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}