35,034 research outputs found

    Central and local government and the provision of municipal medicine, 1919-39

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    This article examines the relationship between central and local government - and specifically the County Boroughs - in interwar England and Wales with respect to the provision of municipal health services. It is argued that this relationship was complex, with different local authorities being compliant to a greater or lesser degree with the aspirations of the Ministry of Health. The latter, it is further suggested, started off its life as a relatively dynamic, well-run and farsighted part of central government, but for a range of reasons lost authority and influence as the interwar era progressed. This was not helped by the limited powers the Ministry held. The local authorities, meanwhile, differed widely in their aspirations for municipally-provided health care. Some were reluctant to do much, others had ambitions somewhat in advance of those of the Ministry of Health. What did unite local authorities was their collective desire to preserve the longstanding tradition of a high degree of local independence. As is also shown, specifically local factors and personnel - for example the political dynamics of the council or the standing of the Medical Officer of Health - could significantly shape a County Borough's approach to health care. The article thus contributes to the history of English and Welsh local government and, especially, to the relatively neglected period in the history of the health services which falls between the demise of the Poor Law and the coming of the National Health Service

    Multi-calculation rate simulations

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    It is common in real time simulations of large aerospace systems to separate the high and low frequency subsystems within the simulation and perform the integrations of the subsystems at different calculation rates. This is done to strike a balance between accuracy of calculation and capacity of the digital computer. Questions arising as to the accuracy of this structure compared to single calculation rates were studied using a linear aircraft model. Also investigated were interactions arising to cause errors worse than those expected. Problems are specifically identified and guidelines are given for selection of sample rates for multiple rate simulations

    Detection of nanoparticles by means of reflection electron energy loss spectroscopy depth profiling

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    The various studies of nanoparticles are of great importance because of the wide application of nanotechnology. The shape and structure of the nanoparticles can be determined by transmission electron microscopy (TEM) and their chemistry by electron energy loss spectroscopy. TEM sample preparation is an expensive and difficult procedure, however. Surface sensitive, analytical techniques, such as Auger electron spectroscopy (AES) and x-ray photoelectron spectroscopy (XPS) are well applicable to detect the atoms that make up the nanoparticles, but cannot determine whether particle formation occurred. On the other hand, reflection electron energy loss spectroscopy (REELS) probes the electronic structures of atoms, which are strongly different for the atoms being in solution or in precipitated form. If the particle size is in the nm range, plasmon resonance can be excited in it, which appears as a loss feature in REELS spectrum. Thus, by measuring AES (XPS) spectra parallel with those of REELS, besides the atomic concentrations the presence of the nanoparticles can also be identified. As an example, the appearance of nanoparticles during ion beam induced mixing of C/Si layer will be shown

    EFFECTS OF CHIGGER MITE (ACARI: TROMBICULIDAE) INFECTIONS ON AMEIVA (SQUAMATA: TEIIDAE) FROM THE ANGUILLA BANK

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    We examined 152 Ameiva plei from four sites on Anguilla and from Scrub Island, a nearby satellite, and 12 A. corax from Little Scrub Island, another Anguillian satellite, generated indices of condition by dividing mass (g) by SVL (mm), and quantified degrees of eutrombiculid chigger mite infections by measuring the total areas (mm2) of each lizard covered by one or more clusters of mites. Prevalence in infected A. plei (N = 77) varied significantly by site, but frequencies of infected males and females within sites did not differ signifi cantly. Indices of condition of infected and mite-free lizards did not differ significantly, nor was area covered by mites significantly correlated with condition, suggesting that mite infections are relatively asymptomatic. All Ameiva corax were infected, and area covered by mites was not significantly correlated with condition. Indices of condition for A. corax were signifi cantly lower than for infected A. plei, probably refl ecting the poorer condition of lizards occupying a food-deficient habitat

    Flesh on the Bones: Animal Bodies in Atlantic Roundhouses

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    This volume presents the state of research across Europe to illustrate how comparable interpretative frameworks are used by archaeologists working with both prehistoric and historical societies

    Level crossing in the three-body problem for strongly interacting fermions in a harmonic trap

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    We present a solution of the three-fermion problem in a harmonic potential across a Feshbach resonance. We compare the spectrum with that of the two-body problem and show that it is energetically unfavorable for the three fermions to occupy one lattice site rather than two. We also demonstrate the existence of an energy level crossing in the ground state with a symmetry change of its wave function, suggesting the possibility of a phase transition for the corresponding many-body case.Comment: 5 pages, 6 figures, typos corrected, references adde

    Aircraft digital control design methods

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    Variations in design methods for aircraft digital flight control are evaluated and compared. The methods fall into two categories; those where the design is done in the continuous domain (or s plane) and those where the design is done in the discrete domain (or z plane). Design method fidelity is evaluated by examining closed loop root movement and the frequency response of the discretely controlled continuous aircraft. It was found that all methods provided acceptable performance for sample rates greater than 10 cps except the uncompensated s plane design method which was acceptable above 20 cps. A design procedure based on optimal control methods was proposed that provided the best fidelity at very slow sample rates and required no design iterations for changing sample rates
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