2,709 research outputs found

    Boundary states for a free boson defined on finite geometries

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    Langlands recently constructed a map that factorizes the partition function of a free boson on a cylinder with boundary condition given by two arbitrary functions in the form of a scalar product of boundary states. We rewrite these boundary states in a compact form, getting rid of technical assumptions necessary in his construction. This simpler form allows us to show explicitly that the map between boundary conditions and states commutes with conformal transformations preserving the boundary and the reality condition on the scalar field.Comment: 16 pages, LaTeX (uses AMS components). Revised version; an analogy with string theory computations is discussed and references adde

    Form-factors computation of Friedel oscillations in Luttinger liquids

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    We show how to analytically determine for g1/2g\leq 1/2 the "Friedel oscillations" of charge density by a single impurity in a 1D Luttinger liquid of spinless electrons.Comment: Revtex, epsf, 4pgs, 2fig

    Innervation of the Forearm and Foot of the Domestic Pig

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    In order to accomplish various nerve blocks to perform satisfactory surgery a comprehensive knowledge about the innervation of the forearm and foot of the domestic pig is of prime importance. This study will also enable us to have a better understanding of the domestic species differences, if any

    Innervation of the Forearm and Foot in the Ox (Bos taurus), Sheep (Ovis aries) and Goat (Capra hircus)

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    From a comparative standpoint and for the sake of applied or practical anatomy to satisfactorily accomplish the nerve block for various surgical procedures for both the fore- and hind extremities of the ox, sheep and goat, a comprehensive knowledge regarding the innervation and disposition of various nerves supplying the appendages in these species is essential

    Comparative Study on the Nomenclature of the Nerves of the Forearm and Forefoot of the Domestic Animals

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    A review of the textbooks of the anatomy of domestic animals, applied anatomy, operative surgery and various other publications pertaining to these regions, both in English and foreign literature, indicate that a variety of terms which are often very confusing are used to designate nerves, especially in the digital region. Therefore, the purpose of this paper is to summarize and compare the various terminologies of the nerves of the forearm (antebranchium) and forefoot (manus) in our domestic animals

    The Arterial Supply to Appendages of the Goat (Capra hircus)

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    The arterial blood supply of both the thoracic and the pelvic limbs of the goat are seldom described in the standard textbooks or in articles, especially in English literature (see bibliography). The assumption has been, perhaps, that there is no significant difference between the vascular patterns in the appendages of the goat and those of the ox and sheep

    Innervation of the Forearm and Foot of the Horse

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    In order to accomplish various nerve blocks to perform satisfactory surgery and for the diagnosis of lameness in the horse, a comprehensive knowledge regarding the nerve supply of different nerves in the region of the forearm and foot is essential. A specific knowledge about the innervation of a particular region many, in turn, aid in the diagnosis of the area of involvement when certain nerves are affected by fracture, trauma, tumor, etc. Therefore, this investigation has both academic and practical application

    Exact noncommutative solitons in p-adic strings and BSFT

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    The tachyon field of p-adic string theory is made noncommutative by replacing ordinary products with noncommutative products in its exact effective action. The same is done for the boundary string field theory, treated as the p -> 1 limit of the p-adic string. Solitonic lumps corresponding to D-branes are obtained for all values of the noncommutative parameter theta. This is in contrast to usual scalar field theories in which the noncommutative solitons do not persist below a critical value of theta. As theta varies from zero to infinity, the solution interpolates smoothly between the soliton of the p-adic theory (respectively BSFT) to the noncommutative soliton.Comment: 1+14 pages (harvmac b), 1 eps figure, v2: references added, typos correcte

    Structural and physical properties of Sm3+ doped magnesium zinc sulfophosphate glass

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    Samarium (Sm3+ ) doped magnesium zinc sulfophosphate glass system of composition (60-x)P2O5-20MgO-20ZnSO4-xSm2O3 (x = 0.0, 0.5, 1.0, 1.5 and 2.0 mol%) were synthesized using melt-quenching technique. The structure and physical properties of prepared glass samples were characterized. The X-ray diffraction pattern verified their amorphous nature. The physical properties such as density, refractive index, molar volume, rare earth ion concentration, etc. were calculated. The decrease in the optical bandgap energy with increasing Sm2O3 contents was attributed to the alteration in the glass network structures. Fourier transformed infrared spectra and Raman analyses manifested the depolymerization of ZnSO4 in the phosphate host matrix. The present findings may be beneficial for the advancement of functional glasses
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