21 research outputs found

    On Dual Formulation for Higher Spin Gauge Fields in (A)dSd(A)dS_d

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    We obtain dual actions for spin s2s \geq 2 massless fields in (A)dSd(A)dS_d by solving different algebraic constraints in the same first-order theory. Flat space dual higher spin actions obtained by Boulanger, Cnockaert and Henneaux \cite{BH} by solving differential constraints are shown to result from our formulation in a sort of quasi-classical approximation for the flat limit. The case of s=2s=2 is considered in detail.Comment: LaTeX, 13 pages, no figure

    Discovery of Middle Jurassic mammals from Siberia

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    Mammal remains from the Middle Jurassic (Bathonian) Berezovsk Quarry on the south of Krasnoyarsk Territory, West Siberia, Russia are referred to Docodonta indet. (two edentulous fragmentary dentaries) and Mammalia indet. (a single−rooted tooth). The dentaries exemplify a unique combination of plesiomorphic characters found among stem mammals only in Docodonta and Morganucodon: well developed Meckel’s groove, trough for postdentary bones with overhanging medial ridge and a diagonal ridge on the floor separating the “adductor fossa” and angular facet, and well developed and posteroventrally directed pseudangular process with facet for the reflected lamina of angular. Both specimens share with Docodonta the prearticular facet placed ventral to the angular facet and extending posteriorly to the mandibular foramen. This facet is not present in Morganucodon, where the prearticular lies medial to the angular. Medial position of the prearticular in Morganucodon is connected with the compound jaw articulation in this genus, in which a rudimentary articular−quadrate mandibular joint is present medially to the dentary−squamosal joint. In Docodonta indet. from Berezovsk Quarry, Haldanodon and Docodon the position of the prearticular ventral to the angular is connected with the position of the articular complex ventral to the dentary condyle. Such articular complex could not function as a mandibular joint and postdentary bones in Docodonta were used solely for sound transmission. One specimen from Berezovsk Quarry shares with Morganucodon a groove for replacement dental lamina, which was not reported previously for Docodonta. Mammal remains from Berezovsk Quarry are among the oldest occurrences for Docodonta, the first record of Jurassic mammals for Siberia, and only second such record for the whole of Russia

    Consensus of Russian experts on the evaluation of arterial stiffness in clinical practice [Согласованное мнение российских экспертов по оценке артериальной жесткости в клинической практике]

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    Recently, there was plenty studies published on the arterial stiffness assessment, and importance of this was proved as an independent prediction parameter, together with standard cardiovascular risk factors. In current document, we collect and structure the available clinical and scientific data from abroad and Russian studies. The aim of current publication is the need to bring a reader the importance of demanded in clinical practice ways of arterial wall stiffness assessment, information about conditions when it is important to the assessment, and available restrictions, as the issues remaining unresolved. © 2016 Vserossiiskoe Obshchestvo Kardiologov. All rights reserved
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