Robert L. Ashenhurst

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The need for education related to information systems in organizations is discussed, and a curriculum is proposed for graduate professional programs in universities, at the Master's level. Material necessary for such programs is identified, and courses incorporating it are specified. Detailed course descriptions are presented, program organization(More)
Information modeling (also known as conceptual modeling or semantic data modeling) may be characterized as the formulation of a model in which information aspects of objective and subjective reality are presented (“the application”), independent of datasets and processes by which they may be realized (“the system”). A methodology for information modeling(More)
Consider the switching function ~ of three variables for which f2 = f4 = f7 = l, and all other fi = O. That is, f(x,y,z) = x,yz' + xy,z' + xyz. Let this function be transformed by the rearrangement xyz->zxy, followed by the inversion of the variables y and z. The rearrangement gives ?(x,y,z) = z,xy' + zx'y' + zxy = xVylz + xylz t + XyZ. Here f(x,y,z) has(More)
Unlike most computers, for which there is a formal distinction between "fixed-point" and "floating-point" numbers, the University of Chicago Maniac III computer handles all numbers in a single format (exponent and coefficient, with the coefficient in general not normalized). This permits several types of arithmetic to be defined, which differ in that(More)
The ACM Curriculum Committee on Computer Education for Management last year issued a report containing a variety of curriculum recommendations for graduate professional programs in information systems [1]. The work of the Committee has been supported by the National Science Foundation.* A brief summary of the recommendations is given in the Proceedings of(More)