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Search Results: 1 - 10 of 401278 matches for " M.;Strauch "
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On the irreducibility of locally analytic principal series representations
S. Orlik,M. Strauch
Mathematics , 2006, DOI: 10.1090/S1088-4165-2010-00387-8
Abstract: Let G be a p-adic connected reductive group with Lie algebra g. For a parabolic subgroup P in G and a finite-dimensional locally analytic representation V of P, we study the induced locally analytic G-representation W = Ind^G_P(V). Our result is the following criterion concerning the topological irreducibility of W: if the Verma module U(g) \otimes_{U(p)} V' associated to the dual representation V' is irreducible then W is topologically irreducible as well.
An Updated “Historical” Algorithm for Hirschsprung Pa-tients Who Present Late or Severely Ill  [PDF]
Samuel M. Alaish, Eric D. Strauch, Steven Stylianos
International Journal of Clinical Medicine (IJCM) , 2013, DOI: 10.4236/ijcm.2013.47A2002
Abstract: Some children with previously undiagnosed Hirschprung’s disease present severely ill at an advanced age with markedly dilated bowel and enterocolitis. In this manuscript, the authors propose the following treatment algorithm: 1) a diverting transverse loop colostomy, 2) a transanal Soave endorectal pull-through, and 3) colostomy closure. The authors report their experience with five patients.
A precise extraction of the induced polarization in the 4He(e,e'p)3H reaction
S. P. Malace,M. Paolone,S. Strauch
Physics , 2010, DOI: 10.1103/PhysRevLett.106.052501
Abstract: We measured with unprecedented precision the induced polarization Py in 4He(e,e'p)3H at Q^2 = 0.8 (GeV/c)^2 and 1.3 (GeV/c)^2. The induced polarization is indicative of reaction-mechanism effects beyond the impulse approximation. Our results are in agreement with a relativistic distorted-wave impulse approximation calculation but are over-estimated by a calculation with strong charge-exchange effects. Our data are used to constrain the strength of the spin independent charge-exchange term in the latter calculation.
Hadrons in the Nuclear Medium
S. Strauch,S. Malace,M. Paolone
Physics , 2010,
Abstract: Nucleon properties are modified in the nuclear medium. To understand these modifications and their origin is a central issue in nuclear physics. For example, a wide variety of QCD-based models, including quark-meson coupling and chiral-quark soliton models, predict that the nuclear constituents change properties with increasing density. These changes are predicted to lead to observable changes in the nucleon structure functions and electromagnetic form factors. We present results from a series of recent experiments at MAMI and Jefferson Lab, which measured the proton recoil polarization in the 4He(e,e'p)3H reaction to test these predictions. These results, with the most precise data at Q^2 = 0.8 (GeV/c)^2 and at 1.3 (GeV/c)^2 from E03-104, put strong constraints on available model calculations, such that below Q^2 = 1.3 (GeV/c)^2 the measured ratios of polarization-transfer are successfully described in a fully relativistic calculation when including a medium modification of the proton form factors or, alternatively, by strong charge-exchange final-state interactions. We also discuss possible extensions of these studies with measurements of the 4He(e,e'p)3H and 2H(e,e'p)n reactions as well as with the neutron knockout in 4He(e,e'n)3He.
Environmental Influences on the Distribution of Mangroves on Bahamas Island
Ayron M Strauch,Sam Cohen,George S Ellmore
Journal of Wetlands Ecology , 2012, DOI: 10.3126/jowe.v6i0.6081
Abstract: Mangrove forests provide valuable ecosystem services but are declining in many tropical locations. The abundance of mangrove species in coastal fringe forests is related to biotic processes such as species succession or competition and abiotic factors, including nutrient availability, physiochemical water quality, soil composition, and tidal inundation. We examined the abundance of Rhizophora mangle and Avicennia germinans relative to environmental factors, including porewater chemistry, soil substrate, and distance from the ocean, on Bahamas Island. In this system, R. mangle were primarily found in litter-dominated soils and abundances were positively related to distance from the ocean, while A. germinans was only found in sandy soils closest to the ocean. Although phosphate, alkalinity, and salinity in porewater did not explain the distribution of species, free chloride varied significantly with distance from the ocean. These results suggest that soil conditions and tidal inundation may help determine the distribution of mangrove species on Caribbean islands. DOI: http://dx.doi.org/10.3126/jowe.v6i0.6081 J Wet Eco 2012 (6): 16-24
Multi-frequency control pulses for multi-level superconducting quantum circuits
Anne M. Forney,Steven R. Jackson,Frederick W. Strauch
Physics , 2009, DOI: 10.1103/PhysRevA.81.012306
Abstract: Superconducting quantum circuits, such as the superconducting phase qubit, have multiple quantum states that can interfere with ideal qubit operation. The use of multiple frequency control pulses, resonant with the energy differences of the multi-state system, is theoretically explored. An analytical method to design such control pulses is developed, using a generalization of the Floquet method to multiple frequency controls. This method is applicable to optimizing the control of both superconducting qubits and qudits, and is found to be in excellent agreement with time-dependent numerical simulations.
A combinatorial identity for studying Sato-Tate type problems
Steven J. Miller,M. Ram Murty,Frederick W. Strauch
Mathematics , 2010,
Abstract: We derive a combinatorial identity which is useful in studying the distribution of Fourier coefficients of L-functions by allowing us to pass from knowledge of moments of the coefficients to the distribution of the coefficients.
Der rheinische Beitrag zur Entstehung des BGB
Dieter Strauch
Forum Historiae Iuris , 2005,
Abstract: Dieter Strauch -------------------------------------------------------------------------------- Der rheinische Beitrag zur Entstehung des BGB - Zusammenfassung - Die Verfasser des BGB haben die durch die franz sische Revolution errungenen drei gro en Freiheiten der Person, des Eigentums und des Rechtsverkehrs (liberté, propriété, autonomie contractuelle) zu sch tzen gewu t. Sie haben sich aber vornehmlich im Strafrecht und im Verfahrensrecht ausgewirkt und hier gro e Fortschritte bewirkt. Die Verfasser des BGB haben sich dieser Freiheiten auch bei der Gestaltung einiger Normen des BGB bedient. Franz sischem Vorbild folgen die Regelungen über lebenslange Dienstvertr ge, Kauf bricht nicht Miete, der sittenwidrigen Sch digung und der Haftung für Hilfspersonen. Auch das holographische Testament hat das Parlament letztlich – wie in Frankreich – durchgesetzt. Aber insgesamt ist der Code civil nicht das bestimmende Vorbild des BGB gewesen. Das lag einmal an den Mitgliedern der ersten Kommission, deren Kenner des franz sischen Rechts eine Minderheit gegenüber den Vertretern des gemeinen Rechts bildeten. Zudem haben die verschiedenen Kommissionen den Liberalismus ihrer Zeit in ihre Entwürfe eingebracht. Auch wo der Code civil veraltet war oder als unzureichend empfunden wurde, hat man seine L sungen nicht übernommen. - English Summary - The jurists who prepared the German Civil Code (BGB) have appreciated the three great freedoms which the French revolution had gained: personal liberty, liberty of property and liberty of conclusion of contracts. These liberties concerned however mainly the penal law and the law of procedure and have brought about there great progress. The autors of the BGB used those liberties while shaping the regulations of this codification. The rules and regulations of lifelong contracts of employment, the rule "contract of sale doesn’t break tenancy agreement", the rule concerning immoral injuries and the rule of the deptors liability for his auxiliary personnel are due to French model. The holographic will the parliament has finally put through after French example too. But in the whole the French Code civil wasn’t taken as a model for the BGB, because the experts in French law were a minority opposed to the representatitives of Roman common law. Furthermore the various commissions introduced liberal ideas of the times into the drafts of the law. In the points where the Cc had become obsolete or was judged inadaequate, the commissions however did not follow this code.
Hadron Medium Modifications
Strauch Steffen
EPJ Web of Conferences , 2012, DOI: 10.1051/epjconf/20123600016
Abstract: Proton recoil polarization in quasielastic electron scattering is a powerful tool to study properties of nucleons bound in the nuclear medium. The most precise results have been obtained at Jefferson Lab in the 4He(e, e′ p)3 H reaction at four momentum transfers of Q2 = 0.8 (GeV/c)2 and at 1.3 (GeV/c)2. The ratio of polarization-transfer components, P′x/P′z, is significantly reduced compared to the ratio obtained in elastic 1H(e, e′ p) scattering. This depletion is well described with models which include in-medium modifications of the proton form factor or, alternatively, by strong charge-exchange final-state interactions. A future experiment will measure the dependence of this effect on the momentum of the struck nucleon in both, the 4He(e, e′ p)3H and 2H(e, e′ p)n reactions.
Medium Modification of the Proton Form Factor
S. Strauch
Physics , 2003, DOI: 10.1140/epjad/s2004-03-025-9
Abstract: I argue that the double ratio of proton-recoil polarization-transfer coefficients, P'_x and P'_z, of the quasielastic 4He(e,e'p)3H reaction with respect to the elastic 1H(e,e'p) reaction is sensitive to possible medium modifications of the proton form factor in 4He. Recent measurements at both Mainz and Jefferson Lab of this double ratio at four-momentum transfers squared between between 0.4 GeV2 and 2.6 GeV2 are discussed. I show that the data challenge state-of-the-art conventional meson-nucleon calculations, as these are unable to describe the results. The data hint at the need to include medium modifications of the proton form factor, as predicted by a quark-meson-coupling model, in the calculations. A recently approved follow-up experiment at a Q2 of 0.8 GeV2 and 1.3 GeV2 with unprecedented precision will provide one of the most stringent tests of the applicability of various calculations.
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