518,393 research outputs found

    Directory of American Missionaries of the Church of Christ: Spring, 1959

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    A directory of American missionaries overseas. Entries include name, address, year of entry, city, state, and source of support.https://digitalcommons.acu.edu/crs_books/1459/thumbnail.jp

    THE STATUS OF THE COMMON CRANE (\u3ci\u3eGRUS GRUS\u3c/i\u3e) IN EUROPE - BREEDING, RESTING, MIGRATION, WINTERING, AND PROTECTION

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    At present, about 160,000 and 100,000 cranes are migrating on the West-European and on the Baltic-Hungarian routes, respectively, from the northern, middle, and northeastern parts of Europe. On both routes, the resting maxima, simultaneously determined since the 1980’s, has increased three-fold. This increase in migratory cranes is the result of shorter migration routes with higher return rates, a growing passage from the northwestern part of Russia beginning in the 1990’s, and a protected status in the European Union at breeding as well as at many resting and wintering sites. Hence, the cranes learn to find and use new breeding and resting locations. Further changes in the migratory behaviour are a 2 to 4 weeks earlier return of the brood-birds in spring and a likewise delayed departure of the last crane groups in autumn. Wintering locations in Western Europe have been shifted to the north: in 1980/81 some 100 cranes wintered in France, whereas in 2000/2001 there were about 68,000 birds doing so. In several European countries there are working groups for the protection of cranes. Every year, the German group organizes an internal meeting to co-ordinate activities. Its mostly honorary members supervise the protection of the breeding and resting places over the whole country. About 50 autumn resting places with 200 up to 50,000 cranes at maximum, are systematically watched by the experts. The state co-ordinator enters the data obtained into an annual synopsis. A survey of crane resting in Germany over 25 years is available. The European Crane Working Group co-ordinates the protective strategies, data acquisition, and ringing of birds. It supports public relations, the exchange of information, scientific research, and European Crane Workshops. The positive development of the crane population in Europe is the result of the cooperation of all parties concerned. It convincingly shows that intense cultivation of the land can be consistent with successful execution of essential protective measures

    Misplaced Fidelity

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    This paper is a review essay of W. Bradley Wendel\u27s Lawyers and Fidelity to Law, part of a symposium on Wendel\u27s book. Parts I and II aim to situate Wendel\u27s book within the literature on philosophical or theoretical legal ethics. I focus on two points: Wendel\u27s argument that legal ethics should be examined through the lens of political theory rather than moral philosophy, and his emphasis on the role law plays in setting terms of social coexistence in the midst of moral pluralism. Both of these themes lead him to reject viewing legal ethics as an instance of the problem of role morality. In part III I note the similarity between Wendel\u27s view and that of legal process theorists, and I argue that the view involves too much complacency about the American legal system. Part IV examines the central metaphor of Wendel\u27s book, fidelity to law. I distinguish between two forms of fidelity, personal and interpretive. The former is a relation between persons, while the latter means mimetic accuracy in interpretation, translation, performance of music, portraiture, or other forms of representation. I agree with Wendel\u27s views on the requirement that lawyers exhibit interpretive fidelity toward law, but not personal fidelity. I argue that law is not the kind of thing toward which one can have personal fidelity; rather, the fidelity must be toward other members of the community rather than toward norms as such; and in cases where the law systematically discriminates, or is otherwise systematically unjust, the bonds of reciprocity grounding such a relation are absent, and the kind of unconditional obedience to law that Wendel supports is unjustified. Part V asks where, on Wendel’s view, the morality went. I argue that Wendel\u27s view, which derives from but modifies Joseph Raz\u27s analysis of legal authority as exclusionary reasons, does not succeed—either it begs the question of whether law actually provides exclusionary reasons or, if (as Wendel suggests) the reasons are not wholly exclusionary, Raz’s two levels of reasoning collapse into one, and acting on moral grounds is not in fact excluded by legal authority. I then turn to Wendel\u27s ideas about moral remainders —the moral costs that acting on his view of legal ethics may inflict on others. Wendel suggests that some form of atonement can cancel the moral remainder, but I am skeptical that his proposal—atoning through law reform activities—can do the job

    Maximum Fidelity

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    The most fundamental problem in statistics is the inference of an unknown probability distribution from a finite number of samples. For a specific observed data set, answers to the following questions would be desirable: (1) Estimation: Which candidate distribution provides the best fit to the observed data?, (2) Goodness-of-fit: How concordant is this distribution with the observed data?, and (3) Uncertainty: How concordant are other candidate distributions with the observed data? A simple unified approach for univariate data that addresses these traditionally distinct statistical notions is presented called "maximum fidelity". Maximum fidelity is a strict frequentist approach that is fundamentally based on model concordance with the observed data. The fidelity statistic is a general information measure based on the coordinate-independent cumulative distribution and critical yet previously neglected symmetry considerations. An approximation for the null distribution of the fidelity allows its direct conversion to absolute model concordance (p value). Fidelity maximization allows identification of the most concordant model distribution, generating a method for parameter estimation, with neighboring, less concordant distributions providing the "uncertainty" in this estimate. Maximum fidelity provides an optimal approach for parameter estimation (superior to maximum likelihood) and a generally optimal approach for goodness-of-fit assessment of arbitrary models applied to univariate data. Extensions to binary data, binned data, multidimensional data, and classical parametric and nonparametric statistical tests are described. Maximum fidelity provides a philosophically consistent, robust, and seemingly optimal foundation for statistical inference. All findings are presented in an elementary way to be immediately accessible to all researchers utilizing statistical analysis.Comment: 66 pages, 32 figures, 7 tables, submitte

    Critical Fidelity

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    Using a Wigner Lorentzian Random Matrix ensemble, we study the fidelity, F(t)F(t), of systems at the Anderson metal-insulator transition, subject to small perturbations that preserve the criticality. We find that there are three decay regimes as perturbation strength increases: the first two are associated with a gaussian and an exponential decay respectively and can be described using Linear Response Theory. For stronger perturbations F(t)F(t) decays algebraically as F(t)tD2F(t)\sim t^{-D_2}, where D2D_2 is the correlation dimension of the critical eigenstates.Comment: 4 pages, 3 figures. Revised and published in Phys. Rev. Let

    Some considerations regarding the use of multi-fidelity Kriging in the construction of surrogate models

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    Surrogate models or metamodels are commonly used to exploit expensive computational simulations within a design optimization framework. The application of multi-fidelity surrogate modeling approaches has recently been gaining ground due to the potential for further reductions in simulation effort over single fidelity approaches. However, given a black box problem when exactly should a designer select a multi-fidelity approach over a single fidelity approach and vice versa? Using a series of analytical test functions and engineering design examples from the literature, the following paper illustrates the potential pitfalls of choosing one technique over the other without a careful consideration of the optimization problem at hand. These examples are then used to define and validate a set of guidelines for the creation of a multi-fidelity Kriging model. The resulting guidelines state that the different fidelity functions should be well correlated, that the amount of low fidelity data in the model should be greater than the amount of high fidelity data and that more than 10\% and less than 80\% of the total simulation budget should be spent on low fidelity simulations in order for the resulting multi-fidelity model to perform better than the equivalent costing high fidelity model

    Fidelity susceptibility in the two-dimensional spin-orbit models

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    We study the quantum phase transitions in the two-dimensional spin-orbit models in terms of fidelity susceptibility and reduced fidelity susceptibility. An order-to-order phase transition is identified by fidelity susceptibility in the two-dimensional Heisenberg XXZ model with Dzyaloshinsky-Moriya interaction on a square lattice. The finite size scaling of fidelity susceptibility shows a power-law divergence at criticality, which indicates the quantum phase transition is of second order. Two distinct types of quantum phase transitions are witnessed by fidelity susceptibility in Kitaev-Heisenberg model on a hexagonal lattice. We exploit the symmetry of two-dimensional quantum compass model, and obtain a simple analytic expression of reduced fidelity susceptibility. Compared with the derivative of ground-state energy, the fidelity susceptibility is a bit more sensitive to phase transition. The violation of power-law behavior for the scaling of reduced fidelity susceptibility at criticality suggests that the quantum phase transition belongs to a first-order transition. We conclude that fidelity susceptibility and reduced fidelity susceptibility show great advantage to characterize diverse quantum phase transitions in spin-orbit models.Comment: 11 pages. 11 figure

    Fidelity approach to quantum phase transitions

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    We review briefly the quantum fidelity approach to quantum phase transitions in a pedagogical manner. We try to relate all established but scattered results on the leading term of the fidelity into a systematic theoretical framework, which might provide an alternative paradigm for understanding quantum critical phenomena. The definition of the fidelity and the scaling behavior of its leading term, as well as their explicit applications to the one-dimensional transverse-field Ising model and the Lipkin-Meshkov-Glick model, are introduced at the graduate-student level. In addition, we survey also other types of fidelity approach, such as the fidelity per site, reduced fidelity, thermal-state fidelity, operator fidelity, etc; as well as relevant works on the fidelity approach to quantum phase transitions occurring in various many-body systems.Comment: 41 pages, 31 figures. We apologize if we omit acknowledging your relevant works. Do tell. An updated version with clearer figures can be found at: http://www.phy.cuhk.edu.hk/~sjgu/fidelitynote.pd
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