3,558 research outputs found

    Part I: the effects of the nature of respired gases on the pulmonary vascular bed with reference to the effects of carbon dioxide, oxygen and nitrogen; Part II: changes in renal function due to the action of certain drugs upon the hypothalamus

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    Variations in the amount of antidiuretic hormone secreted from the neurohypophysis are reflected as changes in the rate of urine flow from the kidneys. The evidence has already been discussed in the introduction to this thesis for the belief that the neurohypophysis is innervated from cells in the supraoptic nucleus; and that the integrity of the nervous connections between the supraoptic nucleus and the neurohypophysis is essential for the normal control of the rate of 'urine secretion.Stimuli applied to the supraoptic nucleus, either directly, or indirectly, cause changes in the rate of urine excretion; thus these changes can be used to indicate the state of activity of the supraoptic nuclear cells.The experiments reported in this thesis have lent further support to the view that acetyl choline stimulates the cells of the supraoptic nucleus. The results also give rise to many interesting speculations, the exact origin of which is obscure at present.The supraoptic nucleus is a comparatively easily accessible central synapse, and in recording variations of the rate of urine secretion a reliable index of the state of activity of the cells is present.It is likely that further work on these lines may provide important information as to the behaviour of central synapses

    RAISE UP LAKEFOG, DIVE

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    Configurations of Extremal Even Unimodular Lattices

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    We extend the results of Ozeki on the configurations of extremal even unimodular lattices. Specifically, we show that if L is such a lattice of rank 56, 72, or 96, then L is generated by its minimal-norm vectors.Comment: 8 pages. To appear, International Journal of Number Theor

    Modelling and testing of long range battery electric vehicle performance

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    There are two significant issues facing road transport in the medium to long term: the depletion of cheap oil reserves and the need to reduce carbon emissions. A long term solution for passenger cars could be the introduction of battery electric vehicles (BEVs). However, one of the main problems associated with the current generation of BEVs is their short range relative to conventional internal combustion engine (ICE) cars.To investigate this issue, a long range battery electric vehicle, the UltraCommuter (UC), was constructed by the University of Waikato in partnership with HybridAuto Ltd. This paper describes the development, modelling and testing of the UC and its performance in the 2007 World Solar Challenge.<br /

    Writing an accounting or business history: Notes toward a methodology

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    Historical research in accounting and business includes many subject areas, including the writing of histories of accounting and business firms. Each subject area of historical research must be undertaken by utilizing appropriate research methodology. In this article, a research methodology is presented to assist those interested in writing an accounting or business history

    Object orientation without extending Z

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    The good news of this paper is that without extending Z, we can elegantly specify object-oriented systems, including encapsulation, inheritance and subtype polymorphism (dynamic dispatch). The bad news is that this specification style is rather different to normal Z specifications, more abstract and axiomatic, which means that it is not so well supported by current Z tools such as animators. It also enforces behavioural subtyping, unlike most object-oriented programming languages. This paper explains the proposed style, with examples, and discusses its advantages and disadvantages

    Report of the Terrestrial Bodies Science Working Group. Volume 4: The moon

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    A rationale for furture exploration of the moon is given. Topics discussed include the objectives of the lunar polar orbiter mission, the mission profile, and general characteristics of the spacraft to be used
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