3,670 research outputs found

    An Account of the Loss of the Country Ship Forbes and Frazer Sinclair, Her Late Commander

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    This paper reports on the life of the English Country trader Captain Frazer Sinclair leading up to and following the loss of the Forbes in the Karimata Strait in 1806. It examines the adventure and tenuous times of trading around the Indonesian archipelago after the fall of the VOC and subsequent transfer to the British. Included are the details of Captain Sinclair\u27s trading history, multiple prizes as a privateer, and shipwrecks

    Critical loads for nutrient nitrogen for soil-vegetation systems

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    Members of the UK Critical Loads Advisory Group (CLAG) have calculated critical loads for nutrient nitrogen to produce maps for Great Britain. The results of three methods, based upon the conclusions from the Lokeberg workshop are described below. Two of these methods use the empirical approachand the other the steady state equation ("mass balance") for nitrogen saturation

    Phase II of the ASCE Benchmark Study on SHM

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    The task group on structural health monitoring of the Dynamic Committee of ASCE was formed in 1999 at the 12 th Engineering Mechanics Conference. The task group has designed a number of analytical studies on a benchmark structure and there are plans to follow these with an experimental program. The first phase of the analytical studies was completed in 2001. The second phase, initiated in the summer of 2001, was formulated in the light of the experience gained on phase I and focuses on increasing realism in the simulation of the discrepancies between the actual structure and the mathematical model used in the analysis. This paper describes the rational that lead the SHM task group to the definition of phase II and presents the details of the cases that are being considered

    An ergonomic study of apartment kitchen work space

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    Thesis (M.S.)--University of Oklahoma, 1975.Includes bibliographical references (leaves 59-63

    Thermodynamics of an attractive 2D Fermi gas

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    Thermodynamic properties of matter are conveniently expressed as functional relations between variables known as equations of state. Here we experimentally determine the compressibility, density and pressure equations of state for an attractive 2D Fermi gas in the normal phase as a function of temperature and interaction strength. In 2D, interacting gases exhibit qualitatively different features to those found in 3D. This is evident in the normalized density equation of state, which peaks at intermediate densities corresponding to the crossover from classical to quantum behaviour.Comment: Contains minor revision

    Transformation optics for antennas: why limit the bandwidth with metamaterials?

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    This work is part funded by the Ministry of Defence and is published with the permission of the Defence Science and Technology Laboratory on behalf of the Controller of HMSO

    Fast-slow asymptotic for semi-analytical ignition criteria in FitzHugh-Nagumo system

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    We study the problem of initiation of excitation waves in the FitzHugh-Nagumo model. Our approach follows earlier works and is based on the idea of approximating the boundary between basins of attraction of propagating waves and of the resting state as the stable manifold of a critical solution. Here, we obtain analytical expressions for the essential ingredients of the theory by singular perturbation using two small parameters, the separation of time scales of the activator and inhibitor, and the threshold in the activator's kinetics. This results in a closed analytical expression for the strength-duration curve.Comment: 10 pages, 5 figures, as accepted to Chaos on 2017/06/2

    Sequoyah v. TVA, 6th Circuit, Docket No. 79-1633: Motion for Leave to Appear and to File Memorandum as Amici Curiae

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    Motion to submit amicus brief filed by the Sisseton-Wahpeton Sioux Tribe, Zuni Tribe, Americans for Indian Opportunity, North American Indian Museum Association and Hui Malama Aina O\u27Koolau in support of the Cherokee groups suing to prevent competition of the Tellico Project

    Re-evaluating the Relevance of Vegetation Trimlines in the Canadian Arctic as an Indicator of Little Ice Age Paleoenvironments

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    The origin of trimlines associated with the so-called “lichen-free” areas in the Canadian Arctic has been attributed both to perennial snowfield expansion during the Little Ice Age (LIA) and to seasonally persistent snow cover in more recent times. Because of the disparate hypotheses (ecological versus paleoclimatic) regarding the formation of these trimlines, their use as a paleoclimatic indicator has been abandoned for more than two decades. We re-examine this debate and the validity of the opposing hypotheses in the light of new regional mapping of trimlines across the Queen Elizabeth Islands (QEI). The ecological hypothesis—insufficient duration of the growing season resulting from seasonally persistent snow cover—fails to account for the poikilohydric nature of lichens and their ability to endure short growing seasons. It cannot adequately explain the existence of sharp trimlines or account for the occurrence of those trimlines on sparsely vegetated carbonate terrain. Furthermore, trimlines outlining the former extent of thin plateau ice caps are accordant with trimlines associated with former perennial snowfields, indicating that these trimlines record snow and ice expansion during the LIA rather than the seasonal persistence of more recent snow cover. We suggest that these features represent an important LIA climate indicator and should therefore be used for paleoclimatic reconstruction.L’origine des épaulements propres aux zones dites sans lichen de l’Arctique canadien a été attribuée tant à l’expansion des champs de neige pérenne pendant le petit âge glaciaire qu’à la couverture de neige longévive d’époques plus récentes. Puisqu’il existe des hypothèses disparates (écologiques par opposition à paléoclimatiques) quant à la formation de ces épaulements, on a arrêté de s’en servir à titre d’indicateur paléoclimatique depuis plus d’une vingtaine d’années. Ici, ce débat fait l’objet d’un nouvel examen où l’on se penche sur la validité des hypothèses divergentes à la lumière du nouveau mappage régional des épaulements des îles de la Reine-Élisabeth. L’hypothèse d’ordre écologique —durée insuffisante de la saison de croissance découlant de la couverture de neige longévive en saison —omet de tenir compte de la nature poecilitique du lichen et de son aptitude à endurer de courtes saisons de croissance. Cette hypothèse ne permet pas d’expliquer adéquatement l’existence d’épaulements précis ou de tenir compte de la présence de ces épaulements en terrain carbonaté à végétation éparse. Par ailleurs, les épaulements qui délimitent l’ancienne étendue des minces calottes glaciaires des plateaux correspondent aux épaulements associés aux anciens champs de neige pérenne, ce qui indique que ces épaulements dénotent les expansions de neige et de glace du petit âge glaciaire et non pas de la couverture de neige longévive saisonnière plus récente. On suggère que ces caractéristiques représentent un important indicateur climatique du petit âge glaciaire et par conséquent, qu’on devrait s’en servir à des fins de reconstruction paléoclimatique
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