4,114 research outputs found

    EMERGING COMPETITIVE DEVELOPMENTS IN THE FOOD SERVICE INDUSTRY

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    Discussed growth in the 1960's, current problems, and trends in the food service industry for the 1970's.Marketing,

    Twin CWG systems Final report

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    Construction, operation, and maintenance of twin control moment gyroscope system for space vehicle motion simulato

    A direct-execution parallel architecture for the Advanced Continuous Simulation Language (ACSL)

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    A direct-execution parallel architecture for the Advanced Continuous Simulation Language (ACSL) is presented which overcomes the traditional disadvantages of simulations executed on a digital computer. The incorporation of parallel processing allows the mapping of simulations into a digital computer to be done in the same inherently parallel manner as they are currently mapped onto an analog computer. The direct-execution format maximizes the efficiency of the executed code since the need for a high level language compiler is eliminated. Resolution is greatly increased over that which is available with an analog computer without the sacrifice in execution speed normally expected with digitial computer simulations. Although this report covers all aspects of the new architecture, key emphasis is placed on the processing element configuration and the microprogramming of the ACLS constructs. The execution times for all ACLS constructs are computed using a model of a processing element based on the AMD 29000 CPU and the AMD 29027 FPU. The increase in execution speed provided by parallel processing is exemplified by comparing the derived execution times of two ACSL programs with the execution times for the same programs executed on a similar sequential architecture

    Efficient parallel architecture for highly coupled real-time linear system applications

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    A systematic procedure is developed for exploiting the parallel constructs of computation in a highly coupled, linear system application. An overall top-down design approach is adopted. Differential equations governing the application under consideration are partitioned into subtasks on the basis of a data flow analysis. The interconnected task units constitute a task graph which has to be computed in every update interval. Multiprocessing concepts utilizing parallel integration algorithms are then applied for efficient task graph execution. A simple scheduling routine is developed to handle task allocation while in the multiprocessor mode. Results of simulation and scheduling are compared on the basis of standard performance indices. Processor timing diagrams are developed on the basis of program output accruing to an optimal set of processors. Basic architectural attributes for implementing the system are discussed together with suggestions for processing element design. Emphasis is placed on flexible architectures capable of accommodating widely varying application specifics

    An intelligent processing environment for real-time simulation

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    The development of a highly efficient and thus truly intelligent processing environment for real-time general purpose simulation of continuous systems is described. Such an environment can be created by mapping the simulation process directly onto the University of Alamba's OPERA architecture. To facilitate this effort, the field of continuous simulation is explored, highlighting areas in which efficiency can be improved. Areas in which parallel processing can be applied are also identified, and several general OPERA type hardware configurations that support improved simulation are investigated. Three direct execution parallel processing environments are introduced, each of which greatly improves efficiency by exploiting distinct areas of the simulation process. These suggested environments are candidate architectures around which a highly intelligent real-time simulation configuration can be developed

    Some Comments on the Revenue Act of 1950

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    Blunt Injuries of the Abdomen

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    Management of closed abdominal injuries, produced by blunt violence, is one of the most challenging problems that the surgeon has to meet. It is usually made difficult by presence of associated injuries of the head, chest, or extremities, and the obvious severity of these may largely or completely mask the early evidences of abdominal visceral injury. It should be emphasized that, in general, injuries of the head and chest take precedence over those of the abdomen, and it is in the multipleinjury cases that intra-abdominal injuries are most frequently overlooked or undertreated. Blows to the abdomen received in sports or industrial accidents are promptly recognized and the patient carefully observed. It is those sustained in a serious automobile crash, a fall from a height, or a blast that present the diagnostic problem

    Some Comments on the Revenue Act of 1950 Part II

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    Some Comments on the Revenue Act of 1950

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