1,420 research outputs found

    Bergman kernel and complex singularity exponent

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    We give a precise estimate of the Bergman kernel for the model domain defined by ΩF={(z,w)∈Cn+1:Imw−∣F(z)∣2>0},\Omega_F=\{(z,w)\in \mathbb{C}^{n+1}:{\rm Im}w-|F(z)|^2>0\}, where F=(f1,...,fm)F=(f_1,...,f_m) is a holomorphic map from Cn\mathbb{C}^n to Cm\mathbb{C}^m, in terms of the complex singularity exponent of FF.Comment: to appear in Science in China, a special issue dedicated to Professor Zhong Tongde's 80th birthda

    A computer aided teleoperator system Final report

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    Computer aided teleoperator system for remote handling task

    Fellhanera gyrophorica, a new European species with conspicuous pycnidia

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    Fellhanera gyrophorica SĂ©rus., Coppins, Diederich & Scheidegger is described as new from Europe Austria, Lithuania, Luxembourg, Poland, Switzerland and Ukraine. It is a sterile corticolous species with conspicuous and sometimes shortly stalked pycnidia whose outer walls produce gyrophoric acid. Its position in the genus Fellhanera (Pilocarpaceae) is tentative and further studies may necessitate its transfer to another genu

    Trimmatostroma commonii, a new lichenicolous hyphomycete inhabiting Graphidaceae hosts

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    The new lichenicolous hyphomycete Trimmatostroma commonii is described from Réunion, the USA (Florida) and Vietnam. It strongly resembles the generic type T. salicis, from which it is distinguished by much looser conidiomatal tufts, less septate conidia and the lichenicolous habitat, growing over species of Graphidaceae in the tropics

    A comparison of the clinical populations of the Oregon Optometric Center and the Pacific University Optometric Clinics

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    This is a study comparing the populations of two optometric clinics. The purpose of this study is to present a statistical comparison of the Oregon Optometric Center and the Pacific University Optometric Clinic. A questionnaire was completed by Junior and Senior Optometry. Students to record these differences. The results showed significant differences between the two populations as to the patient\u27s last visual examination, last medical or dental examination, residence, education, entrance habitual visual acuity, presbyopic near prescripti on, and the near nonpresbyopic prescription. Recommendations are included for present use and further study

    Random replicators with high-order interactions

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    We use tools of the equilibrium statistical mechanics of disordered systems to study analytically the statistical properties of an ecosystem composed of N species interacting via random, Gaussian interactions of order p >= 2, and deterministic self-interactions u <= 0. We show that for nonzero u the effect of increasing the order of the interactions is to make the system more cooperative, in the sense that the fraction of extinct species is greatly reduced. Furthermore, we find that for p > 2 there is a threshold value which gives a lower bound to the concentration of the surviving species, preventing then the existence of rare species and, consequently, increasing the robustness of the ecosystem to external perturbations.Comment: 7 pages, 4 Postscript figure

    Hindered Coulomb explosion of embedded Na clusters -- stopping, shape dynamics and energy transport

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    We investigate the dynamical evolution of a Na8_8 cluster embedded in Ar matrices of various sizes from N=30 to 1048. The system is excited by an intense short laser pulse leading to high ionization stages. We analyze the subsequent highly non-linear motion of cluster and Ar environment in terms of trajectories, shapes, and energy flow. The most prominent effects are: temporary stabilization of high charge states for several ps, sudden stopping of the Coulomb explosion of the embedded Na8_8 clusters associated with an extremely fast energy transfer to the Ar matrix, fast distribution of energy throughout the Ar layers by a sound wave. Other ionic-atomic transfer and relaxation processes proceed at slower scale of few ps. The electron cloud is almost thermally decoupled from ions and thermalizes far beyond the ps scale.Comment: 12 pages, 10 figures, accepted in Euro. Phys. J.
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