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Proceedings of the IEEE

Issue 8 • Aug. 1975

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Displaying Results 1 - 25 of 37
  • [Front cover and table of contents]

    Publication Year: 1975, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1975, Page(s):1092 - 1095
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    Freely Available from IEEE
  • Projections of data processing memory usage

    Publication Year: 1975, Page(s):1096 - 1103
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (867 KB)

    An overview of the demand for various types of memory used with computer systems is presented. The types of memory and the major memory applications are discussed and analyzed for trends which will affect the amount and type of memory required for future computer systems. General business and scientific computers are by far the largest users of memory. This trend will continue with the advent of c... View full abstract»

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  • Computer storage structure and utilization at a large scientific laboratory

    Publication Year: 1975, Page(s):1104 - 1113
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1141 KB)

    The Octopus computer network at the Lawrence Livermore Laboratory, University of California, Livermore, ties together one of the largest concentrations of computing capability in the world, serving about 1500 users. The network's information storage capacity is large in every range of access speed. There are computers with main memories of 30 Mbits and secondary storage of 10 Gbits, a shared terti... View full abstract»

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  • Space and time savings through large data base compression and dynamic restructuring

    Publication Year: 1975, Page(s):1114 - 1122
    Cited by:  Papers (10)  |  Patents (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (944 KB)

    The conventional general-purpose data management system tends to make inefficient use of storage space. By reducing the physical size of the data, substantial savings are available in the area of storage cost. Reduction ratios of 4:1 and more are realizable. This also reduces the amount of I/O time required to physically transfer data between secondary and primary memories. Since I/O time tends to... View full abstract»

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  • Cost/performance perspectives of paging with electronic and electromechanical backing stores

    Publication Year: 1975, Page(s):1123 - 1128
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (457 KB)

    An analysis is made of the cost/performance effectiveness of virtual memory systems employing paging disks or drums and those employing electronic backing stores such as charge coupled devices (CCD), MOS shift registers, or bubbles. The analysis is based on a multiprogrammed job stream and a simplified queuing model employing page-fault rates suitable for a variety of multiprogrammed environments.... View full abstract»

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  • The cost and performance tradeoffs of buffered memories

    Publication Year: 1975, Page(s):1129 - 1135
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    An analysis of the performance enhancement achieved and the incremental costs accrued in buffering (using a cache memory) memory systems is made. Buffering is found to be cost-effective even for minicomputer memories. The study indicates that the flagged registered swap algorithm is superior to three other common algorithms used. It is shown that when jobs are switched, a substantial number of mem... View full abstract»

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  • A review and projection of semiconductor components for digital storage

    Publication Year: 1975, Page(s):1136 - 1147
    Cited by:  Papers (10)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1456 KB)

    Evolution of present integrated-circuit technology over the remainder of the decade should result in semiconductor memories which are competitive with moving-surface memories and other alternatives in many digital storage applications requiring 107-1010bits capacity. This paper considers MOS, MNOS, CCD, and bipolar component approaches to this objective. Cost, reliability, an... View full abstract»

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  • An overview of disk storage systems

    Publication Year: 1975, Page(s):1148 - 1152
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (527 KB)

    After nearly three decades, magnetic recording is still the principal means for storing data in computer systems. This success has resulted from continued progress in cost reduction per byte, higher densities, and better operating performance. Further efforts in these same areas will extend the popularity of magnetic recording throughout the near future. View full abstract»

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  • An analysis of tape drive technology

    Publication Year: 1975, Page(s):1153 - 1159
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (690 KB)

    A history of the half-inch digital magnetic tape drives as viewed through the development improvements in the various component subsystems within the tape drive is given. View full abstract»

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  • Terabit memory systems: A design history

    Publication Year: 1975, Page(s):1160 - 1165
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (910 KB)

    The TBM memory system development effort is described, starting with initial concepts in 1965, through feasibility experiments in 1966, engineering model in 1968, manufacturing prototype in 1971, first delivered system in 1972, and system developments that have occurred in the last three years. The evolution of the initial concepts is illustrated by examining the features incorporated in these suc... View full abstract»

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  • The IBM 3850: A mass storage system with disk characteristics

    Publication Year: 1975, Page(s):1166 - 1170
    Cited by:  Papers (6)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (497 KB)

    The IBM 3850 is a hierarchical storage system that provides capacities of up to 472 billion bytes and offers disk-access capabilities by use of a virtual direct-access storage concept. The architecture of the system is described in terms of control and data flow within the mass storage system (MSS). An example of tape/disk I/O work load on a current system is analyzed to indicate the data-transfer... View full abstract»

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  • The IBM 3850 mass storage system: Design aspects

    Publication Year: 1975, Page(s):1171 - 1176
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    The IBM 3850 mass storage system is a new concept in large data base storage. This paper explores the principal design objectives and the options chosen in designing the hardware and the data flow for the system. The 3850 is an approach that provides up to 472 × 109bytes of storage, gives reasonable on-line storage cost comparable to manually loaded flexible media products such as ... View full abstract»

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  • Magnetic bubbles—An emerging new memory technology

    Publication Year: 1975, Page(s):1176 - 1195
    Cited by:  Papers (52)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3279 KB)

    Magnetic bubbles-an emerging storage technique-promise to bridge the capacity-data retrieval time gap left vacant by magnetic core and semiconductor devices on one side and the electromechanical magnetic tape and disk on the other. Improvements in bubble materials, circuit processing, and device design have advanced bubble technology to where it is a solid candidate for applications requiring 10 View full abstract»

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  • The frontiers of magnetic bubble technology

    Publication Year: 1975, Page(s):1196 - 1206
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1441 KB)

    Two areas of major emphasis in the development of magnetic bubble memories are discussed: the effort to increase the bit-packing density and the effort to increase the operating speed of these memories. It is pointed out that increasing the density by scaling down an existing chip design involves consideration of not only lithographic and fabrication problems, but also magnetic materials problems.... View full abstract»

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  • An overview of optical data storage technology

    Publication Year: 1975, Page(s):1207 - 1230
    Cited by:  Papers (18)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2959 KB)

    Optical techniques for data storage have advanced rapidly during the last decade. Optical data storage presents many unique advantages, notably the high storage density and low access time, not attainable by conventional recording techniques. The special features of optical recording, the proposed materials and techniques, the components for optical storage as well as some representative optical b... View full abstract»

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  • A semiconductor nonvolatile electron beam accessed mass memory

    Publication Year: 1975, Page(s):1230 - 1240
    Cited by:  Papers (16)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1758 KB)

    BEAMOS-beam addressed metal-oxide-semiconductor is a new technology for fast auxiliary memories which is expected to find important applications in military and commercial data systems. The concept is based on electron beam accessing, using a matrix lens, of a simple MOS memory chip. It has performance features which include large bit capacity per module (> 30 × 106bits), short ... View full abstract»

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  • Reciprocity theorem for a region with inhomogeneous anisotropic media and with surface impedance

    Publication Year: 1975, Page(s):1245 - 1246
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    The validity of the reciprocity theorem for a region bounded by inhomogeneous anisotropic impedance surface and composed of regions with lossless inhomogeneous anisotropic media whose parameters vary with position is discussed. View full abstract»

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  • On geometric progression ladder RC networks

    Publication Year: 1975, Page(s):1246 - 1247
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (181 KB)

    The possibility of an approach to the analysis of nonrecurrent RC ladder networks by means of recurrent RCG ladder networks is presented. View full abstract»

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  • Corrections to "The electromagnetic field in rotating coordinate frames"

    Publication Year: 1975, Page(s): 1246
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  • On the integration of unstable linear systems

    Publication Year: 1975, Page(s):1247 - 1249
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (277 KB)

    An efficient approach to the problem of numerically computing the solution to a system of ordinary autonomous differential equations has been proposed by Davison and Maki. In this letter, their algorithm is modified to effectively treat the problem of integrating in unstable system whose forcing function is a constant. View full abstract»

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  • Superconducting-cavity stabilized oscillators with improved frequency stability

    Publication Year: 1975, Page(s):1249 - 1250
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (254 KB)

    X-band microwave oscillators stabilized with superconducting niobium cavities with loaded Q's of about 1010achieved short-term frequency stabilities as low as σy=6 × 10-16, and typical long-term fractional frequency drifts of ± 2 × 10-13per day. View full abstract»

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  • Generation of cyclic sequences using D and T flip-flops

    Publication Year: 1975, Page(s):1250 - 1251
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (259 KB)

    A general polynomial is derived for cyclic sequences generrated by circuits employing only D and T flip-flops. For specific combinations of the flip-flops, a simple method of expanding the polynomial using a mod-2 Pascal's triangle is given. View full abstract»

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  • The E cell—A global CAD model and a new VLF oscillator

    Publication Year: 1975, Page(s):1251 - 1253
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (299 KB)

    A model of an inexpensive microcoulombmeter device is introduced which is globally valid and capable of being handled by most general-purpose circuit analysis programs available today. The model is validated by the computer analysis of a new very low frequency oscillator circuit. View full abstract»

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  • The active medium propagation device

    Publication Year: 1975, Page(s):1253 - 1254
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (283 KB)

    A novel device concept for materials which exhibit the Gunn effect is presented. An active solid-state transmission line has been achieved on n-type GaAs using a coplanar design. View full abstract»

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North Carolina State University