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IBM Journal of Research and Development

Issue 5 • Date Sep. 1966

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Displaying Results 1 - 13 of 13
  • Design of Monolithic Circuit Chips

    Publication Year: 1966 , Page(s): 370 - 376
    Cited by:  Papers (2)
    Click to expandAbstract | PDF file iconPDF (585 KB)  

    The influence of semiconductor chip design on the logic partitioning of a computer is discussed and some design rules are given. A chip size of 60 × 60 mils with 24 terminals and 168 components was shown to be optimum. RF-sputtered quartz insulation was used for multilevel wiring and a hermetic seal. Using a master chip technique, a 9-part-number logic set was successfully fabricated. Propa... View full abstract»

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  • Theory of Domain-Wall Structure in Multiple Magnetic Films

    Publication Year: 1966 , Page(s): 377 - 387
    Cited by:  Papers (12)
    Click to expandAbstract | PDF file iconPDF (758 KB)  

    This paper derives analytically a two-dimensional wall-structure applying to the case of two identical magnetic films separated by a non-magnetic film. It applies also to a variety of other multilayer problems. The calculation is based on the usual micro-magnetic principle of energy minimization and all approximations are justified. The wall-structure is found to consist of two “flankȁ... View full abstract»

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  • On Multi-Head Finite Automata

    Publication Year: 1966 , Page(s): 388 - 394
    Cited by:  Papers (8)
    Click to expandAbstract | PDF file iconPDF (495 KB)  

    Let Mn be the class of languages defined by n-head finite automata. The Boolean and Kleene closure properties of Mn are investigated, and a relationship between Mn and the class of sets of n-tuples of tapes defined by n-tape finite automata is established. It is shown that the classes Mi form a hierarchy; and that, moreover, for all n, there is a context... View full abstract»

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  • The Quantum Mechanical Extension of the Boltzmann Equation

    Publication Year: 1966 , Page(s): 395 - 400
    Cited by:  Papers (1)
    Click to expandAbstract | PDF file iconPDF (438 KB)  

    It is shown that the method of Kohn and Luttinger may be applied to obtain a generalized Boltzmann equation, for electrons in a solid, when the driving field has nonzero wavevector as well as frequency. By means of this equation, the behavior of the electrons in response to the field may be followed from the quasi-classical limit at small rates of change to the quantal limit at large rates of chan... View full abstract»

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  • End-Pumped Stimulated Emission from a Thiacarbocyanine Dye

    Publication Year: 1966 , Page(s): 401
    Cited by:  Papers (2)  |  Patents (1)
    Click to expandAbstract | PDF file iconPDF (189 KB)  

    Using the same technique employed1 in obtaining stimulated emission from chloro-aluminum phthalocyanine (CAP) solutions (where the beam from a giant-pulse ruby laser was caused to impinge transversely upon a cell filled with a dye solution and located within a secondary resonating cavity), we recently observed intense stimulated emission from a commercially available photosensitizing dy... View full abstract»

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  • The Kantorovich Theorem and Two-Point Boundary Value Problems

    Publication Year: 1966 , Page(s): 402 - 406
    Click to expandAbstract | PDF file iconPDF (421 KB)  

    Two-point boundary value problems for nonlinear ordinary differential equations occur naturally and frequently in applied mathematics, physics and engineering. for example, many problems in flight mechanics, optimization, and control theory, when attacked by the calculus of variations, lead to two-point boundary value problems View full abstract»

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  • Digital Simulation of Image-Forming Systems

    Publication Year: 1966 , Page(s): 407 - 411
    Click to expandAbstract | PDF file iconPDF (359 KB)  

    In this communication we discussed briefly the difference between spatial and dynamic systems. Because the impulse response of a dynamic block and the impulse response (spread function) of a spatial block differ in a fundamental way, spatial systems cannot be simulated by applying the techniques developed for dynamic systems simulation. Therefore, there is a need for spatial systems simulation pro... View full abstract»

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  • Design of a Moiré Fringe Torque Transducer

    Publication Year: 1966 , Page(s): 412 - 415
    Cited by:  Papers (1)
    Click to expandAbstract | PDF file iconPDF (341 KB)  

    This transducer has advantages for certain applications where conventional techniques are not adequate. One such application is the measurement of torque variation in a rotating shaft when a physical connection to the shaft is undesirable. The transducer could also be useful when used with high speed movies. This use can give the engineer a visual indication of torque while the mechanism action th... View full abstract»

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  • Influence of Non-ideal Filters on the Transmission Characteristics of Resonant Transfer Switching Systems

    Publication Year: 1966 , Page(s): 416 - 419
    Click to expandAbstract | PDF file iconPDF (386 KB)  

    This communication analyzes the influence of non-ideal practical filters with finite cutoff slope on the transmission characteristics of general resonant transfer systems. Lowpass-to-lowpass resonant transfer transmission systems have been used in the past1–5 as means for efficiently implementing time-division switching systems. A basic transmission path in these systems consists... View full abstract»

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  • Surface Attack in Chromium-Iron Alloys

    Publication Year: 1966 , Page(s): 420 - 421
    Click to expandAbstract | PDF file iconPDF (227 KB)  

    Welchner and Roush1 used the term “surface attack” to describe supposed grain-boundary oxide deposits which they observed at and immediately beneath the surface of case-carburized steel parts. Hultgren and Hägglund2 proposed that grain-boundary oxides could form during carburizing, provided certain alloying elements (such as chromium) having a greater aff... View full abstract»

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  • Technical Papers by IBM Authors Published Recently in Other Journals

    Publication Year: 1966 , Page(s): 422 - 431
    PDF file iconPDF (774 KB)  
    Freely Available from IEEE
  • Recent Issued Patents Assigned to IBM

    Publication Year: 1966 , Page(s): 432 - 434
    PDF file iconPDF (229 KB)  
    Freely Available from IEEE
  • Authors

    Publication Year: 1966 , Page(s): 435 - 436
    PDF file iconPDF (247 KB)  
    Freely Available from IEEE

Aims & Scope

The IBM Journal of Research and Development is a peer-reviewed technical journal, published bimonthly, which features the work of authors in the science, technology and engineering of information systems.

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Meet Our Editors

Editor-in-Chief
Clifford A. Pickover
IBM T. J. Watson Research Center