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Symposium on Problems in the Optimization of Data Communications Systems最新文献

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Computers and privacy: A proposal for self-regulation 计算机与隐私:一项自我监管的建议
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1969-10-13 DOI: 10.1145/800165.805245
E. J. Grenier
{"title":"Computers and privacy: A proposal for self-regulation","authors":"E. J. Grenier","doi":"10.1145/800165.805245","DOIUrl":"https://doi.org/10.1145/800165.805245","url":null,"abstract":"The purpose of this paper is to analyze some of the legal problems faced by the computer industry in the area of assuring privacy and security of data both during transmission and storage and to propose a solution. The focus of the paper is upon recent trends in the law of privacy generally and a theoretical projection of possible future developments in view of the computer revolution and the ever increasing automation of data handling, processing, storage and retrieval. In view of these trends and likely future developments, and in order to assure continued operation of the computer industry in the public interest, the author proposes that the computer industry embark on a program of self-regulation modeled on the highly successful National Association of Securities Dealers. Such a program must be fashioned under the auspices of the federal government and pursuant to express federal statutory authority.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1969-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128963844","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}
引用次数: 5
A model for the local area of a data communication network objectives and hardware organization 数据通信网络目标和硬件组织的局部区域模型
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1969-10-13 DOI: 10.1145/800165.805243
R. Scantlebury
{"title":"A model for the local area of a data communication network objectives and hardware organization","authors":"R. Scantlebury","doi":"10.1145/800165.805243","DOIUrl":"https://doi.org/10.1145/800165.805243","url":null,"abstract":"This paper, together with its companions(1)(2) describes the experimental data communication network being implemented at the National Physical Laboratory. The purpose of the work is two-fold.\u0000 Firstly, it will act as a model of the 'local area' network assumed, but never analysed in detail, in the NPL proposal for a possible National Data Communication System(3)(4)(5).\u0000 Secondly, it will provide data communications between a wide variety of devices. These range from computers to teletypes and are spread over the 78 acres of the Laboratory site.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1969-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131858916","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}
引用次数: 18
A model for the local area of a data communication network software organization 一个数据通信网络软件组织的局部区域模型
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1969-10-13 DOI: 10.1145/800165.805242
P. T. Wilkinson
{"title":"A model for the local area of a data communication network software organization","authors":"P. T. Wilkinson","doi":"10.1145/800165.805242","DOIUrl":"https://doi.org/10.1145/800165.805242","url":null,"abstract":"A general purpose store-and-forward data communication network is under development at NPL. The background to this work is described in companion papers(1)(2) which also detail the hardware environment in which the software of the central message switching computer (MSC) operates.\u0000 A user of this system sees it as a star-connected network by means of which his terminal may exchange data with any other terminal via the MSC. Because this centre is stored-program controlled, it is possible to offer the user other communications-oriented facilities in addition to the basic data transmission function. The MSC may be described as a multi-access computer controlled by a timesharing operating system.\u0000 Section 2 gives a description of the way in which terminals use the network, illustrating the main principles of operation of the system as a whole and outlining the features provided by software. Section 3 is a description of the operating system of the MSC.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1969-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115921759","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}
引用次数: 7
Graf/Pen 坟墓/笔
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1969-10-13 DOI: 10.1145/800165.805250
A. Whetstone
{"title":"Graf/Pen","authors":"A. Whetstone","doi":"10.1145/800165.805250","DOIUrl":"https://doi.org/10.1145/800165.805250","url":null,"abstract":"The Graf/Pen is a digitizing or data gathering device in which the operator simply holds a pen to point or to create graphical input for digital systems. Previous attempts to provide a natural graphical input have suffered from one or more disadvantages. The method in which strings extend from the cursor to mechanical or optical encoders (mangiospago) does not allow the operator to sketch as naturally as with a pen. The method of crossed wire grids and capacitive sensing known as the Rand Tablet is inherently expensive while being limited in size and format. Other methods using resistive sheets and capacitive sensing suffer from poor integral linearity, and in addition, require ADC's.\u0000 Our own R & D group has long had all of the technology needed to solve the problems, but we were in a different area of science and were unaware of the need for a natural man-machine interface. A little accidental cross-fertilization between us and computer scientists prompted us to develop the extremely simple and versatile device I am about to describe.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1969-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129178768","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}
引用次数: 1
Data transmission over FDM/FM troposcatter systems FDM/FM对流层散射系统上的数据传输
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1969-10-13 DOI: 10.1145/800165.805239
L. Yeh
{"title":"Data transmission over FDM/FM troposcatter systems","authors":"L. Yeh","doi":"10.1145/800165.805239","DOIUrl":"https://doi.org/10.1145/800165.805239","url":null,"abstract":"There are more than one hundred troposcatter systems of various sizes in existence all over the world.1 As the transmission of computer data becomes more and more in common and popular demand, such systems are certain to be involved in these services.\u0000 Two methods are generally used for transmitting data over troposcatter channels: direct transmission and FDM/FM technique. In the latter, the individual data channels are combined into an FDM baseband to frequency or phase modulate a common radio carrier—the same technique used conventionally for the carrier transmission of multiplex telephone channels.\u0000 In this study, only FDM/FM techniques are investigated as it is of immediate and primary interest. It was found that both theoretically and experimentally, troposcatter systems can support data transmission of various rates from 2.4 to 40.8 kbps for path lengths of nominally from 100 to 400 statute miles in smooth earth geometry with diversity reception, if proper path and equipment parameters were chosen.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1969-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131688408","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}
引用次数: 0
Experience with the use of the British Standard Interface in computer peripherals and communication systems 有在计算机外围设备和通信系统中使用英国标准接口的经验
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1969-10-13 DOI: 10.1145/800165.805246
D. Barber
{"title":"Experience with the use of the British Standard Interface in computer peripherals and communication systems","authors":"D. Barber","doi":"10.1145/800165.805246","DOIUrl":"https://doi.org/10.1145/800165.805246","url":null,"abstract":"The new British Standard Specification(1) 4421 entitled “A Digital Input/Output Interface for Data Collection Systems” is gaining wide recognition in the United Kingdom and has been submitted to the International Standards Organisation for International appraisal.\u0000 Although the B.S. Interface has been described elsewhere (5)(6)(7) a brief outline is given here to facilitate the subsequent discussion of its applications to computer peripherals, small computers, and the NPL data network.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"116 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1969-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116569965","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}
引用次数: 3
Preprocessors in a data communication computer environment 数据通信计算机环境中的预处理器
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1969-10-13 DOI: 10.1145/800165.805247
D. Mills
{"title":"Preprocessors in a data communication computer environment","authors":"D. Mills","doi":"10.1145/800165.805247","DOIUrl":"https://doi.org/10.1145/800165.805247","url":null,"abstract":"Realizing the need for a highly adaptable transmission control unit to interface varied terminal equipment to the Michigan Timesharing System (MTS), the University of Michigan initiated in 1965 the development of a special control unit to be used in conjunction with the System/360 Model 67. Called the Data Concentrator\u0000 The design approach taken in the Data Concentrator has been to nucleate about a small general-purpose computer a number of special-purpose interfaces to the various data set equipment. An integral part of the design is an interface which connects directly to the Model 67 multiplexor channels on one hand and to the Data Concentrator computer on the other. This approach avoids the operational restrictions imposed by an off-the-shelf IBM control unit to interface the two machines.\u0000 In the next section several points will be raised concerning the design goals of this equipment, concerning general characteristics desirable in any terminal control unit and supporting supervisory system.\u0000 Following this is a detailed description of the Data Concentrator hardware and an overview description of its supervisory program system. Much of this material has appeared in [3 and 6].","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1969-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134477494","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}
引用次数: 2
Joint automatic equalization for data communication 联合自动均衡数据通信
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1969-10-13 DOI: 10.1145/800165.805249
R. Chang
{"title":"Joint automatic equalization for data communication","authors":"R. Chang","doi":"10.1145/800165.805249","DOIUrl":"https://doi.org/10.1145/800165.805249","url":null,"abstract":"In data transmission systems with transversal filter equalization, the adjustment of the demodulating carrier phase, the receiver sampling time, and the equalizer tap gains are critical to the system's performance. These parameters cannot be set optimally by independent adjustments. In this talk, a method of jointly setting these parameters based on a minimum mean-square error equalization criterion is described. The possible implementation of the method and its applications to data communication are discussed. Computer simulations show that, when compared with systems using independent settings, the method proposed may offer a reduction in mean-square equalization error of as much as 10 db.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1969-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132924917","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}
引用次数: 2
On-line communications and the computer 在线通讯和计算机
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1969-10-13 DOI: 10.1145/800165.805251
F. Morioka, R. Wainwright
{"title":"On-line communications and the computer","authors":"F. Morioka, R. Wainwright","doi":"10.1145/800165.805251","DOIUrl":"https://doi.org/10.1145/800165.805251","url":null,"abstract":"This paper contains information on the general characteristics of the Control Data Corporation, MDM Communications Division M1000 Communications Message Switching System.\u0000 It is the intent of this paper to discuss the analytic systems approach to the problem that led to the building of unique hardware and software to resolve the message handling functions. The M1000 hardware and software system features are discussed in the paper.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1969-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121612002","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}
引用次数: 0
Design considerations of statistical multiplexors 统计多路复用器的设计考虑
Symposium on Problems in the Optimization of Data Communications Systems Pub Date : 1969-10-13 DOI: 10.1145/800165.805238
W. Chu
{"title":"Design considerations of statistical multiplexors","authors":"W. Chu","doi":"10.1145/800165.805238","DOIUrl":"https://doi.org/10.1145/800165.805238","url":null,"abstract":"Design considerations for statistical multiplexors with Poisson message arrivals and the following three types of messages are considered: 1) constant length messages, 2) random length messages, and 3) segmented random length messages with fixed-size blocks. The operating costs of the multiplexors can be divided into transmission costs and storage costs. The transmission costs are dependent on the transmission rates of the lines and the number of lines used. The storage costs are dependent on the buffer length required, the cost of overhead in buffer management, and the cost of waste spaces of fixed-size block messages. The queuing delays imposed by multiplexors are dependent, for example, on delays due to buffering and computer scheduling algorithms. The trade-offs among transmission costs, storage costs, and delays are described. An optimal multiplexor is the one that yields minimum operating costs yet satisfies the required performances (e.g., delays, overflow probabilities). Some design considerations of multiplexing systems are then illustrated via examples.","PeriodicalId":383824,"journal":{"name":"Symposium on Problems in the Optimization of Data Communications Systems","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1969-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114228044","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}
引用次数: 14
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