13,977 research outputs found

    Challenging US Country of Origin Labelling at the World Trade Organization: The Law, The Issues and The Evidence

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    Canada and Mexico are formally challenging US country of origin (COOL) legislation at the World Trade Organization. The industries most affected by COOL are beef and pork. The effect of COOL on North American cross border supply chains is outlined. The areas of international trade law upon which a challenge could be mounted are explained and the key issues that a disputes panel would have to determine indicated. The nature of the evidence that may be required to bolster Canada’s case is outlined.country of origin, marks of origin, protectionism, Technical Barriers to Trade, supply chains, WTO, Agribusiness, Agricultural and Food Policy, Demand and Price Analysis, International Relations/Trade, Marketing,

    Challenging US Country of Origin Labelling at the WTO: The Law, the Issues and the Evidence

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    COOL, WTO, labelling, despite, Agricultural and Food Policy, International Relations/Trade,

    Clusters of Entrepreneurship

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    Employment growth is strongly predicted by smaller average establishment size, both across cities and across industries within cities, but there is little consensus on why this relationship exists. Traditional economic explanations emphasize factors that reduce entry costs or raise entrepreneurial returns, thereby increasing net returns and attracting entrepreneurs. A second class of theories hypothesizes that some places are endowed with a greater supply of entrepreneurship. Evidence on sales per worker does not support the higher returns for entrepreneurship rationale. Our evidence suggests that entrepreneurship is higher when fixed costs are lower and when there are more entrepreneurial people.Entrepreneurship, Industrial Organization, Chinitz, Agglomeration, Clusters, Cities.

    Light-curve modelling constraints on the obliquities and aspect angles of the young Fermi pulsars

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    In more than four years of observation the Large Area Telescope on board the Fermi satellite has identified pulsed γ\gamma-ray emission from more than 80 young pulsars, providing light curves with high statistics. Fitting the observations with geometrical models can provide estimates of the magnetic obliquity α\alpha and aspect angle ζ\zeta, yielding estimates of the radiation beaming factor and luminosity. Using γ\gamma-ray emission geometries (Polar Cap, Slot Gap, Outer Gap, One Pole Caustic) and radio emission geometry, we fit γ\gamma-ray light curves for 76 young pulsars and we jointly fit their γ\gamma-ray plus radio light curves when possible. We find that a joint radio plus γ\gamma-ray fit strategy is important to obtain (α\alpha, ζ\zeta) estimates that can explain simultaneous radio and γ\gamma-ray emission. The intermediate-to-high altitude magnetosphere models, Slot Gap, Outer Gap, and One pole Caustic, are favoured in explaining the observations. We find no evolution of α\alpha on a time scale of a million years. For all emission geometries our derived γ\gamma-ray beaming factors are generally less than one and do not significantly evolve with the spin-down power. A more pronounced beaming factor vs. spin-down power correlation is observed for Slot Gap model and radio-quiet pulsars and for the Outer Gap model and radio-loud pulsars. For all models, the correlation between γ\gamma-ray luminosity and spin-down power is consistent with a square root dependence. The γ\gamma-ray luminosities obtained by using our beaming factors not exceed the spin-down power. This suggests that assuming a beaming factor of one for all objects, as done in other studies, likely overestimates the real values. The data show a relation between the pulsar spectral characteristics and the width of the accelerator gap that is consistent with the theoretical prediction for the Slot Gap model.Comment: 90 pages, 80 figures (63 in Appendices), accepted for publication in Astronomy and Astrophysic

    Crystal structures of four indole derivatives as possible cannabinoid allosteric antagonists

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    Acknowledgements We thank the EPSRC National Crystallography Service (University of Southampton) for the data collections and the EPSRC National Mass Spectrometry Service (University of Swansea) for the HRMS data. We thank John Low for carrying out the Cambridge Database survey.Peer reviewedPublisher PD

    Clinical and service implications of a cognitive analytic therapy model of psychosis

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    Cognitive analytic therapy (CAT) is an integrative, interpersonal model of therapy predicated on a radically social concept of self, developed over recent years in the UK by Anthony Ryle. A CAT-based model of psychotic disorder has been developed much more recently based on encouraging early experience in this area. The model describes and accounts for many psychotic experiences and symptoms in terms of distorted, amplified or muddled enactments of normal or ‘neurotic’ reciprocal role procedures (RRPs) and of damage at a meta-procedural level to the structures of the self. Reciprocal role procedures are understood in CAT to represent the outcome of the process of internalization of early, sign-mediated, interpersonal experience and to constitute the basis for all mental activity, normal or otherwise. Enactments of maladaptive RRPs generated by early interpersonal stress are seen in this model to constitute a form of ‘internal expressed emotion’. Joint description of these RRPs and their enactments (both internally and externally) and their subsequent revision is central to the practice of CAT during which they are mapped out through written and diagrammatic reformulations. This model may usefully complement and extend existing approaches, notably recent CBT-based interventions, particularly with ‘difficult’ patients, and generate meaningful and helpful understandings of these disorders for both patients and their treating teams. We suggest that use of a coherent and robust model such as CAT could have important clinical and service implications in terms of developing and researching models of these disorders as well as for the training of multidisciplinary teams in their effective treatment

    Photon rockets and gravitational radiation

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    The absence of gravitational radiation in Kinnersley's ``photon rocket'' solution of Einstein's equations is clarified by studying the mathematically well-defined problem of point-like photon rockets in Minkowski space (i.e. massive particles emitting null fluid anisotro\-pically and accelerating because of the recoil). We explicitly compute the (uniquely defined) {\it linearized} retarded gravitational waves emitted by such objects, which are the coherent superposition of the gravitational waves generated by the motion of the massive point-like rocket and of those generated by the energy-momentum distribution of the photon fluid. In the special case (corresponding to Kinnersley's solution) where the anisotropy of the photon emission is purely dipolar we find that the gravitational wave amplitude generated by the energy-momentum of the photons exactly cancels the usual 1/r1/r gravitational wave amplitude generated by the accelerated motion of the rocket. More general photon anisotropies would, however, generate genuine gravitational radiation at infinity. Our explicit calculations show the compatibility between the non-radiative character of Kinnersley's solution and the currently used gravitational wave generation formalisms based on post-Minkowskian perturbation theory.Comment: 21 pages, LATEX, submitted to Class. Quant. Gra

    Contemporary France

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    First published in 1984. Routledge is an imprint of Taylor & Francis, an informa company

    Network-aware Evaluation Environment for Reputation Systems

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    Parties of reputation systems rate each other and use ratings to compute reputation scores that drive their interactions. When deciding which reputation model to deploy in a network environment, it is important to find the most suitable model and to determine its right initial configuration. This calls for an engineering approach for describing, implementing and evaluating reputation systems while taking into account specific aspects of both the reputation systems and the networked environment where they will run. We present a software tool (NEVER) for network-aware evaluation of reputation systems and their rapid prototyping through experiments performed according to user-specified parameters. To demonstrate effectiveness of NEVER, we analyse reputation models based on the beta distribution and the maximum likelihood estimation
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