The framework of an approach to distributed computing system software design is presented. In this approach, the data and functional components are considered separately and all interactions among the functional compo...
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The framework of an approach to distributed computing system software design is presented. In this approach, the data and functional components are considered separately and all interactions among the functional components are allowed only through the access of shared resources. A precise description of all aspects of software design, including the data and functional components, their structural relations and interactions, is developed. A possible way of estimating the performance of the software design is suggested. Finally, a design example is given to illustrate this approach.
An interactive, computer-controlled, crt image digitizer is being used for bubble chamber analysis in the field of high energy physics. The software architecture has been designed as a virtual computer, the instructio...
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An interactive, computer-controlled, crt image digitizer is being used for bubble chamber analysis in the field of high energy physics. The software architecture has been designed as a virtual computer, the instructions of which are related as much as possible to elementary operations on the picture. A special purpose language allows easy programming of this virtual computer. A prototype of the system has been developed on a multi-computer architecture. For the actual system, the choice has been a multiprocessor architecture (CDC CYBER 72). The advantages of this solution are emphasized and a comparison between the two architectures made which emphasize parallel processing and task distribution, debugging conditions, reliability, self test, maintenance, and adaptability.
A non-queueing model of a multiprogrammed interactive system substantially more sophisticated and more accurate than the deterministic models previously proposed is presented in tabular, graphical, and equation form.
A non-queueing model of a multiprogrammed interactive system substantially more sophisticated and more accurate than the deterministic models previously proposed is presented in tabular, graphical, and equation form.
A new programmable logic controller is proposed with which a complex control system can be designed without resorting to an intuitive solution. In the present programmable logic controller, a number of simple, basic m...
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A new programmable logic controller is proposed with which a complex control system can be designed without resorting to an intuitive solution. In the present programmable logic controller, a number of simple, basic modules of sequential mechanism can be combined to form a complex sequence system; the complete system is synthesized during executions of programs by a multiprogramming method in which a number of parts sequence programs are controlled by scanning. Thus, even a complex system can be designed with ease, and the design time of a sequence control system can be reduced greatly.
A design Automation System for the RT level of design is described. The System explores the design space by finding alternative implementations for a user given behavioral specification. The alternative solutions are ...
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A design Automation System for the RT level of design is described. The System explores the design space by finding alternative implementations for a user given behavioral specification. The alternative solutions are obtained by transformations on a graph model. These transformations effect trade-offs between the cost of the hardware and the speed of the algorithm. Heuristic routines are used to reduce the design space by exploring only those alternatives whose characteristics approach a user given set of goals.
An approach to the analysis of concurrent software is discussed. The approach, called anomaly detection, involves the algorithmic derivation of information concerning potential errors and the subsequent, possibly non-...
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An approach to the analysis of concurrent software is discussed. The approach, called anomaly detection, involves the algorithmic derivation of information concerning potential errors and the subsequent, possibly non-algorithmic determination of whether or not the reported anomalies are actual errors. Overviews are given of algorithms for detecting data-usage and synchronization anomalies and discuss how this technique may be integrated within a general software development support system.
This paper outlines an approach to the production of microprocessor-based systems which meliorates the emerging productivity crisis by providing system designers with a specialized environment rich in high-level devel...
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This paper outlines an approach to the production of microprocessor-based systems which meliorates the emerging productivity crisis by providing system designers with a specialized environment rich in high-level development tools. The approach emphasizes the use of an integrated development facility, transportability of software between machines, and the use of high-level languages tailored to particular applications domains.
The general characteristics, writing and development and applications of decisions which provide a graphical representation of complex procedures in a way that is easy to visualize and understand are described. Detail...
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The general characteristics, writing and development and applications of decisions which provide a graphical representation of complex procedures in a way that is easy to visualize and understand are described. Details of case studies for the implementation of decision table applications in manufacturing systems are indicated.
Automated Structured Design/I (ASD/I) is a system specification processor which generates IBM or Burroughs ANS Cobol programs. An integral part of ASD/I are forms which enable the development of specifications in a st...
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Automated Structured Design/I (ASD/I) is a system specification processor which generates IBM or Burroughs ANS Cobol programs. An integral part of ASD/I are forms which enable the development of specifications in a structured (Top-Down) manner. From the specifications a program ″super-structure″ is created by ASD/I. Transaction processing logic is developed separately and integrated into the program ″super-structure″ by ASD/I. This paper presents the principles and techniques used in program development with ASD/I.
The main function and features essential to a simple but effective operating system for real-time applications on microcomputers, called ″microEx-99″ are described. The Micro EX-99 is already running in several syst...
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The main function and features essential to a simple but effective operating system for real-time applications on microcomputers, called ″microEx-99″ are described. The Micro EX-99 is already running in several systems based either on TI standard hardware (900/4 CPU) or Soft Power developed microcomputer boards.
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