161,818 research outputs found

    Personal Papers (MS 80-0002)

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    Letter from Isaac H. Kempner to W. L. Vogler informing that he would be selling a portion of his property

    Personal Papers (MS 80-0002)

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    Letter from Isaac H. Kempner to W. L. Vogler informing that he went to the chairman board regarding the insurance companies

    Personal Papers (MS 80-0002)

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    Letter from Isaac H. Kempner to W. L. Vogler thanking for including him in the insurance statement

    Measuring the performance of asynchronous systems with PAFAS

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    Based on PAFAS (Process Algebra for Faster Asynchronous Systems), a testing-based faster-than relation has been developed that compares asynchronous systems according to their worst-case efficiency. While the testing definition is qualitative, we point out that it can also be seen as considering quantitative performance measures. Then we adapt the PAFAS-approach to a setting, where user behaviour is known to belong to a very specific, but often occurring class of request-response behaviours, and show how to determine an asymptotic performance measure for finite-state processes. We discuss a number of examples showing the usefulness of this setting and demonstrating the effect of asynchronicity on the performance measure

    Personal Papers (MS 80-0002)

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    Letter from W. Vogler to Harris L. Kempner inviting him to a dinner being put on by the American National Insurance Company

    Performance of pipelined asynchronous systems

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    AbstractA testing-based faster-than relation has previously been developed that compares the worst-case efficiency of asynchronous systems. This approach reveals that pipelining does not improve efficiency in general; that it does so in practice depends on assumptions about the user behaviour. Accordingly, the approach was adapted to a setting where user behaviour is known to belong to a specific, but often occurring class of request–response behaviours; some quantitative results on the efficiency of the respective so-called response processes were given. In particular, it was shown that in the adapted setting a very simple case of a pipelined process with two stages is faster than a comparable atomic processing of the two stages.In this paper, we determine the performance of general pipelines, which is not so easy in an asynchronous setting. Pipelines are built with a chaining operator; we also study whether the adapted faster-than relation is compatible with chaining and two other parallel composition operators, and give results on the performance of the respective compositions. These studies also demonstrate how rich the request–respond setting is

    W. T. Vogler and Son's Jewelry Store

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    William T. Vogler and Son moved their jewelry store to 322 Liberty Street in Winston around 1902. The man standing behind the fenced area is William T. Vogler

    Personal Papers (MS 80-0002)

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    Letter from W. L. Vogler to I. H. Kempner asking for donations to the Boys' Club of America

    Personal Papers (MS 80-0002)

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    Letter from W. L. Vogler to Harris L. Kempner discussing his methods for determining if an insurance company is worth purchasing
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