396 research outputs found

    Simulacija porarizacijskih mjerenja u elektrotvorbi kaona Monte Carlo metodom

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    Kaon electro-production experiments with polarized electron beam are planed at the Thomas Jefferson National Accelerator Facility (Virginia, USA) in order to complete the information on polarization response functions for the kaon electro-production reactions. The experiment uses the self analyzing property of the Λ recoil. The scattered electrons will be detected in coincidence with the kaons and the decay protons. This paper presents the simulation of this experiment which takes into account the spectrometer acceptances, multiple scattering and radiative corrections. The phase space distribution of the decay protons in the Λ center-of-mass system are generated in order to extract information on the polarization on the three directions. An experimental test with an unpolarized beam has been performed to estimate the efficiency of the method.U Thomas Jefferson National Accelerator Facility (Virginia, USA) predlaĆŸu se mjerenja elektrotvorbi s polariziranim elektronima radi cjelovitosti podataka o polarizacijskim funkcijama odziva u elektrotvorbi kaona. Mjerenje rabi samoanalizacijsko svojstvo odboja Λ čestice. RasprĆĄeni elektroni opaĆŸat će se sudesno s kaonima i protonima. Ovaj rad predstavlja simulaciju tog eksperimenta u kojoj se uzimaju u obzir prihvati spektrometara, viĆĄestruko rasprĆĄenje i radijativne popravke. Izvodi se fazna raspodjela protona u centru mase Λ čestice radi dobivanja podataka o polarizaciji u trima smjerovima. Mjerenjem pomoću nepolariziranog snopa ocijenili smo učinkovitost metode

    Bending strain-tunable magnetic anisotropy in Co2FeAl Heusler thin film on Kapton

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    Bending effect on the magnetic anisotropy in 20 nm Co2_{2}FeAl Heusler thin film grown on Kapton\textregistered{} has been studied by ferromagnetic resonance and glued on curved sample carrier with various radii. The results reported in this letter show that the magnetic anisotropy is drastically changed in this system by bending the thin films. This effect is attributed to the interfacial strain transmission from the substrate to the film and to the magnetoelastic behavior of the Co2_{2}FeAl film. Moreover two approaches to determine the in-plane magnetostriction coefficient of the film, leading to a value that is close to λCFA=14×10−6\lambda^{CFA}=14\times10^{-6}, have been proposed.Comment: 4 pages, 4 figure

    Puerperal uterine inversion: a new case report

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    Puerperal uterine inversion is a rare and severe affection which the uterine fundus collapses into the endometrial cavity. The diagnosis is essentially made on clinical examination, which also allows to determinate the gravity. The management must be done early, which can be surgical or non-surgical. Through a case study we will review the literature

    Amniotic band syndrome: a new case report

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    Amniotic band syndrome is a pathology affecting the extremities of the fetus. It is uncommon with rates around 1 per 10,000 births. The pathophysiology is poorly understood until now with several theories reported in the literature. The diagnosis is most often made at birth. We reported a case of a 40 year old patient with no particular history who had consulted for spontaneous premature rupture of membranes in a 20 weeks pregnancy. The diagnostic of amniotic band syndrome was made after the delivery with amputation of a limb, amniotic syndactilia and deformation of the right foot in equinovarus

    Codes affines-invariants lineaires de longueur impaire sur Z4

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    Etude de la productivitĂ© et de la sensibilitĂ© de diverses variĂ©tĂ©s de tomate (Lycopersicon esculentum Mill) Ă  la virose du jaunissement et de l’enroulement en cuillĂšre des feuilles au SĂ©nĂ©gal

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    AprĂšs l’oignon, la tomate est le plus important lĂ©gume au SĂ©nĂ©gal. Elle est trĂšs sensible au virus Tomato Yellow Leaf Curl (TYLCV). Quatorze variĂ©tĂ©s de tomate ont Ă©tĂ© testĂ©es pour Ă©valuer leur productivité et leur rĂ©sistance au TYLC Ă  diffĂ©rents stades phĂ©nologiques (floraison, fructification et maturitĂ©) dans un dispositif en blocs complets randomisĂ©s comptant trois rĂ©pĂ©titions. Les rĂ©sultats ont montrĂ© que le nombre de fruits/grappe a variĂ© entre les variĂ©tĂ©s. La masse unitaire des fruits Ă©tait plus Ă©levĂ©e pour Bybal, Roma VF et Lety F1. La longueur des fruits de Thoriya et Lety F1 Ă©tait plus importante. Roma VF et Bybal ont prĂ©sentĂ© les plus gros fruits. TY75 et Ponchita ont produit les rendements en fruits consommables les plus Ă©levĂ©s. Roma VF et Lety F1 ont produit les rendements non consommables les plus Ă©levĂ©s. Globalement, TY75 et Roma VF ont étĂ© plus productives. Une rĂ©sistance au virus a Ă©tĂ© observĂ©e chez douze variĂ©tĂ©s et une forte sensibilitĂ© chez deux autres (Roma VF et Xina). Ces rĂ©sultats pourraient intĂ©resser les sĂ©lectionneurs, les firmes semenciĂšres et les agriculteurs dans leur choix de variĂ©tĂ©s de tomate Ă  cultiver.Mots clĂ©s : Tomate, Lycopersicon esculentum, TYLCV, SĂ©nĂ©ga

    Interaction of (3-Aminopropyl)triethoxysilane with Pulsed Ar-O 2 Afterglow: Application to Nanoparticles Synthesis

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    International audienceThe interaction of (3-Aminopropyl)triethoxysilane (APTES) with pulsed late Ar-O 2 afterglow is characterized by the synthesis of OH, CO and CO 2 in the gas phase as main by-products. Other minor species like CH, CN and C 2 H are also produced. We suggest that OH radicals are produced in a first step by dehydrogenation of APTES after interaction with oxygen atoms. In a second step, the molecule is oxidized by any O 2 state, to form peroxides that transform into by-products, break thus the precursor CC bonds. If oxidation is limited, i.e. a low duty cycle, fragmentation of the precursor is limited and produced nanoparticles keep the backbone structure of the precursor, but contain amide groups produced from the amine groups initially available in APTES. At high duty cycle, silicon-containing fragments contain some carbon and react together and produce nanoparticles with a non-silica-like structure

    Ternary Syndrome Decoding with Large Weight

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    The Syndrome Decoding problem is at the core of many code-based cryptosystems. In this paper, we study ternary Syndrome Decoding in large weight. This problem has been introduced in the Wave signature scheme but has never been thoroughly studied. We perform an algorithmic study of this problem which results in an update of the Wave parameters. On a more fundamental level, we show that ternary Syndrome Decoding with large weight is a really harder problem than the binary Syndrome Decoding problem, which could have several applications for the design of code-based cryptosystems
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