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Now showing items 145 - 160 of 21864

  • Recent progress in understanding the L–H transition physics from ASDEX Upgrade

    E Wolfrum   P Sauter   M Willensdorfer   F Ryter   F Aumayr   L Barrera–Orte   A Burckhart   E Fable   R Fischer   B Kurzan   T Pütterich   S K Rathgeber   W Suttrop   E Viezzer   the ASDEX Upgrade Team  

    Kinetic edge profiles are measured with high spatial and temporal resolution and their behaviour before and after the time of the L–H transition is analysed. It is shown that at low densities electron and ion channels are strongly decoupled and that the ion kinetic profiles determine the transition to H-mode.
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  • E n l o e A w a r d 2 0 1 2 h o n o r a b l e m e n t i o n

    Wilcox, Lauren  

    The bodies produced by the violent practice of suicide bombing are a source of horror and disgust. They are, in feminist psychoanalyst Julia Kristeva's concept, abject: that which defies borders and is expelled to create the self. As abject bodies', suicide bombers' bodies frustrate attempts at calculation and rational control of security risks, and, in their mutilated flesh, expose as unstable the idea of the body as a whole with clearly defined boundaries between inside and outside. Female suicide bombers, whose bodies are already considered abject', produce a politics of the body that exceeds narratives of victimhood, and whose very monstrosity symbolically threatens the foundations of the nation-state. Attempts at constructing subjects out of the mutilated bodily remains of victims and perpetrators of suicide bombings are key practices in the production of the state and gendered subjects. The practice of suicide bombing and efforts to recover and resignify bodies reveals how power molds and constitutes the border of the body and state simultaneously. The explosive body of the suicide bomber thus has destabilizing effects beyond the motivations of its perpetrators and exposes the political work necessary to maintain the illusion of secure, bounded bodies and states.
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  • Support vector machine-based feature extractor for L/H transitions in JET

    Gonzalez, S.   Vega, J.   Murari, A.   Pereira, A.   Ramirez, J. M.   Dormido-Canto, S.  

    Support vector machines (SVM) are machine learning tools originally developed in the field of artificial intelligence to perform both classification and regression. In this paper, we show how SVM can be used to determine the most relevant quantities to characterize the confinement transition from low to high confinement regimes in tokamak plasmas. A set of 27 signals is used as starting point. The signals are discarded one by one until an optimal number of relevant waveforms is reached, which is the best tradeoff between keeping a limited number of quantities and not loosing essential information. The method has been applied to a database of 749 JET discharges and an additional database of 150 JET discharges has been used to test the results obtained. [doi:10.1063/1.3502327]
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  • Anomalous Higgs couplings in angular asymmetries of H -> Z l(+)l(-) and e(+)e(-) -> H Z

    Beneke, Martin   Boito, Diogo   Wang, Yu-Ming  

    We study in detail the impact of anomalous Higgs couplings in angular asymmetries of the crossing-symmetric processes H -> Zl(+)l(-) and e(+)e(-) -> HZ. Beyond Standard Model physics is parametrized in terms of the SU(3) x SU(2)(L) x U(1)(Y) dimension-six effective Lagrangian. In the light of present bounds on d = 6 interactions we study how angular asymmetries can reveal non-standard CP-even and CP-odd couplings. We provide approximate expressions to all observables of interest making transparent their dominant dependence on anomalous couplings. We show that some asymmetries may reveal BSM effects that are hidden in other observables. In particular, CP-even and CP-odd d = 6 H Z gamma couplings as well as (to a lesser extent) HZl(+)l(-)contact interactions can generate asymmetries at the several percent level, while having small or no effects on the di-lepton invariant mass spectrum of H -> Zl(+)l(-). Finally, the higher di-lepton invariant mass probed in e(+)e(-) -> HZ leads to interesting differences in the asymmetries with respect to those of H -> Zl(+)l(-) that may lead to complementary anomalous coupling searches at the LHC and e(+)e(-) colliders.
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  • A converse of H?rmander’s L~2-estimate and new positivity notions for vector bundles

    Genki Hosono;Takahiro Inayama  

    We study conditions of H?rmander’s L~2-estimate and the Ohsawa-Takegoshi extension theorem.Introducing a twisted version of the H?rmander-type condition, we show a converse of H?rmander’s L~2-estimate under some regularity assumptions on an n-dimensional domain. This result is a partial generalization of the one-dimensional result obtained by Berndtsson(1998). We also define new positivity notions for vector bundles with singular Hermitian metrics by using these conditions. We investigate these positivity notions and compare them with classical positivity notions.
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  • Campanus of Novara and Euclid\"s \"Elements\"by H. L. L. Busard

    Review by: John N. Crossley  

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  • Syndromes hémolytiques et urémiques de l’adulte

    Alex,re Hertig, Christophe Ridel, É   ric Rondeau  

    Hemolytic uremic syndrome (HUS) is related to a renal thrombotic microangiopathy, inducing hypertension and acute renal failure (ARF). Its pathogenesis involves an activation/lesion of microvascular endothelial cells, mainly in the renal vasculature, secondary to bacterial toxins, drugs, or autoantibodies. An overactivation of the complement alternate pathway secondary to a heterozygote deficiency of regulatory proteins (factor H, factor I or MCP) or to an activating mutation of factor B or C3 can also result in HUS. Less frequently, renal microthrombi are due to an acquired or a constitutional deficiency in ADAMTS-13, the protease cleaving von Wilebrand factor. Hemolytic anemia with schistocytes, thrombocytopenia without evidence of disseminated intravascular coagulation, and renal failure are consistently found. In typical HUS, a prodromal diarrhea, with blood in the stools, is observed, related to pathogenic enterobacteria, most frequently E. Coli O157:H7. HUS may also occur in the post partum period, and is then related to a factor H or factor I deficiency. HUS may also occur after various treatments such as mitomycin C, gemcitabine, ciclosporin A, or tacrolimus, and as reported more recently bevacizumab, an anti VEGF antibody. Atypical HUS are not associated with diarrhea, may be sporadic or familial, and can be related to an overactivation of the complement alternate pathway. More recently, some of them have been related to a mutation of thrombomodulin, which also regulates the alternate pathway of complement. In adults, several HUS are encountered in the course of chronic nephropathies: nephroangiosclerosis, chronic glomerulonephritis, post irradiation nephropathy, scleroderma, disseminated lupus erythematosus, antiphospholipid syndrome. Overall the prognosis of HUS has improved, with a patient survival greater than 85%at 1 year. Chronic renal failure is observed as a sequella in 20 to 65%of the cases. Plasma infusions and plasma exchanges are effective in most of the cases to treat hemolysis and thrombocytopenia. Steroid therapy is debated, as well as immunosuppressive drugs, including rituximab, in autoimmune forms. A new monoclonal anti-C5 antibody is tested, and seems to be effective in atypical HUS with abnormal complement alternate pathway activation. If terminal renal failure occurs, renal transplantation can be performed but the risk of recurrence, which very low in post infectious forms of HUS, is about 70 to 80%in genetic forms of complement regulatory protein deficiency.
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  • Targeted Chromatin Profiling Reveals Novel Enhancers in Ig H and Ig L Chain Loci

    Predeus, A. V.   Gopalakrishnan, S.   Huang, Y.   Tang, J.   Feeney, A. J.   Oltz, E. M.   Artyomov, M. N.  

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  • Le bloc de l\"Est en question || ? Objectifs bulles ?... pour les historien(ne)s !

    Marc Bergère  

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  • H. L. Mencken and the Four Doctors: Osler, Halsted, Welch, and Kelly

    Roberts, Charles Stewart  

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  • Prévention de l’hépatite C : du retard ?

    Jean-Marie Manus  

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  • CORRECTION: PICKING WINNERS: W. H. AND W. L. BRAGG AT THE ROYAL INSTITUTION

    John Meurig Thomas  

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  • The alignment of L + H* pitch accents in Persian intonation

    Sadat-Tehrani   Nima  

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  • The Cali meteorite fall: A new H/L ordinary chondrite

    Josep M. TRIGO-RODRíGUEZ   Jordi LLORCA   Alan E. RUBIN   Jeffrey N. GROSSMAN   Derek W. G. SEARS   Mateo NARANJO   Stacy BRETZIUS   Mar TAPIA   Marino H. GUARíN SEPúLVEDA  

    The fall of the Cali meteorite took place on 6 July 2007 at 16 h 32 ± 1 min local time (21 h 32 ± 1 min UTC). A daylight fireball was witnessed by hundreds of people in the Cauca Valley in Colombia from which 10 meteorite samples with a total mass of 478 g were recovered near 3°24.3'N, 76°30.6'W. The fireball trajectory and radiant have been reconstructed with moderate accuracy. From the computed radiant and from considering various plausible velocities, we obtained a range of orbital solutions that suggest that the Cali progenitor meteoroid probably originated in the main asteroid belt. Based on petrography, mineral chemistry, magnetic susceptibility, thermoluminescence, and bulk chemistry, the Cali meteorite is classified as an H/L4 ordinary chondrite breccia.
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  • Bilder im Wechsel der T?ne: H?lderlins Elegien und \"Nachtges?nge\"by Uta Degner

    Review by: Kirk Wetters  

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  • Erwachsene im l?ndlichen Teil Nepals: Sind Atemwegserkrankungen h?ufig?

    Drews, A   Bergmann, T   John, G   Seibt, R   Devkota, J   Ram Giri, B   Scheuch, K  

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