Showing 2012Show all

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astro-ph.HE2012★ 40 cited

Variable pulse profiles of Her X-1 repeating with the same irregular 35d clock as the turn-ons

R. Staubert, D. Klochkov, D. Vasco +4

The accreting X-ray pulsar Her X-1 shows two types of long-term variations, both with periods of ~35 days: 1) Turn-on cycles, a modulation of the flux}, with a ten-day long Main-On…

cs.IT2012★ 111 cited

Energy-Efficient Resource Allocation in Multiuser OFDM Systems with Wireless Information and Power Transfer

Derrick Wing Kwan Ng, Ernest S. Lo, Robert Schober

In this paper, we study the resource allocation algorithm design for multiuser orthogonal frequency division multiplexing (OFDM) downlink systems with simultaneous wireless informa…

cs.IT2012★ 239 cited

The PAPR Problem in OFDM Transmission: New Directions for a Long-Lasting Problem

Gerhard Wunder, Robert F. H. Fischer, Holger Boche +2

Peak power control for multicarrier communications has been a long-lasting problem in signal processing and communications. However, industry and academia are confronted with new c…

astro-ph.HE2012★ 200 cited

Measurement of the extragalactic background light imprint on the spectra of the brightest blazars observed with H.E.S.S

H. E. S. S. Collaboration, :, A. Abramowski +195

The extragalactic background light (EBL) is the diffuse radiation with the second highest energy density in the Universe after the cosmic microwave background. The aim of this stud…

nucl-ex2012★ 128 cited

Isospin Decomposition of the Basic Double-Pionic Fusion in the Region of the ABC Effect

P. Adlarson, W. Augustyniak, W. Bardan +111

Exclusive and kinematically complete high-statistics measurements of the basic double pionic fusion reactions pn -> dpi0pi0, pn -> d pi+pi- and pp -> dpi+pi0 have been carried out…

cond-mat.mtrl-sci2012★ 137 cited

Contribution of the buffer layer to the Raman spectrum of epitaxial graphene on SiC(0001)

F. Fromm, M. H. Oliveira, A. Molina-Sánchez +5

We report a Raman study of the so-called buffer layer with periodicity which forms the intrinsic interface structure between epitaxial graphene…

nucl-ex2012★ 20 cited

The neutron-proton charge-exchange amplitudes measured in the dp -> ppn reaction

D. Mchedlishvili, S. Barsov, J. Carbonell +41

The unpolarised differential cross section and the two deuteron tensor analysing powers A_{xx} and A_{yy} of the pol{d}p -> (pp)n charge-exchange reaction have been measured with t…

nucl-th2012★ 76 cited

On the toroidal nature of the low-energy E1 mode

A. Repko, P. -G. Reinhard, V. O. Nesterenko +1

The nature of E1 low-energy strength (LES), often denoted as a "pygmy dipole resonance", is analyzed within the random-phase-approximation (RPA) in Pb using Skyrme forces i…

physics.ins-det2012★ 26 cited

The Polarized H and D Atomic Beam Source for ANKE at COSY-Jülich

M. Mikirtychyants, R. Engels, K. Grigoryev +12

A polarized atomic beam source was developed for the polarized internal storage-cell gas target at the magnet spectrometer ANKE of COSY-Jülich. The intensities of the beams injecte…

cs.IT2012★ 69 cited

Non-Systematic Complex Number RS Coded OFDM by Unique Word Prefix

Mario Huemer, Christian Hofbauer, Johannes B. Huber

In this paper we expand our recently introduced concept of UW-OFDM (unique word orthogonal frequency division multiplexing). In UW-OFDM the cyclic prefixes (CPs) are replaced by de…

astro-ph.SR2012★ 61 cited

Temperature, gravity and bolometric correction scales for non-supergiant OB stars

Maria-Fernanda Nieva

Context. Precise and accurate determinations of effective temperature and surface gravity are mandatory to derive reliable chemical abundances and fundamental parameters like dista…

astro-ph.HE2012★ 25 cited

A Suzaku X-ray observation of one orbit of the supergiant fast X-ray transient IGR J16479-4514

L. Sidoli, P. Esposito, V. Sguera +6

We report on a 250 ks long X-ray observation of the supergiant fast X-ray transient (SFXT) IGR J16479-4514 performed with Suzaku in 2012 February. About 80% of the short orbital pe…

physics.atm-clus2012★ 13 cited

Anion-radical oxygen centers in small (AgO)n clusters: density functional theory predictions

Egor V. Trushin, Igor L. Zilberberg

Anion-radical form of the oxygen centers O(-) is predicted at the DFT level for small silver oxide particles having the AgO stoichiometry. Model clusters (AgO)n appear to be ferrom…

astro-ph.SR2012★ 7 cited

Hot Subdwarf Formation: Confronting Theory with Observation

S. Geier

The formation of hot subdwarf stars is still unclear. Both single-star and binary scenarios have been proposed to explain the properties of these evolved stars situated at the extr…

hep-ex2012★ 69 cited

Leading and Next-to-Leading Order Gluon Polarisation in the Nucleon and Longitudinal Double Spin Asymmetries from Open Charm Muoproduction

C. Adolph, M. G. Alekseev, V. Yu. Alexakhin +217

The gluon polarisation in the nucleon was measured using open charm production by scattering 160 GeV/c polarised muons off longitudinally polarised protons or deuterons. The data w…

hep-ex2012★ 7 cited

D* and D Meson Production in Muon Nucleon Interactions at 160 GeV/c

C. Adolph, M. G. Alekseev, V. Yu. Alexakhin +217

The production of D* and D mesons in inelastic scattering of 160 GeV/c muons off a ^6LiD target has been investigated with the COMPASS spectrometer at CERN for 0.003 (GeV/c)^2 < Q^…

cond-mat.mtrl-sci2012★ 135 cited

Growth and Electronic Structure of Boron-Doped Graphene

J. Gebhardt, R. J. Koch, W. Zhao +7

The doping of graphene to tune its electronic structure is essential for its further use in carbon based electronics. Adapting strategies from classical silicon based semiconductor…

hep-ex2012★ 193 cited

Multiplicities of charged pions and kaons from semi-inclusive deep-inelastic scattering by the proton and the deuteron

HERMES Collaboration, A. Airapetian, N. Akopov +135

Multiplicities in semi-inclusive deep-inelastic scattering are presented for each charge state of π^\pm and K^\pm mesons. The data were collected by the HERMES experiment at the HE…

math.PR2012

Path-properties of the tree-valued Fleming-Viot process

Andrej Depperschmidt, Andreas Greven, Peter Pfaffelhuber

We consider the tree-valued Fleming-Viot process, , with mutation and selection as studied in Depperschmidt, Greven, Pfaffelhuber (2012). This process mod…

cond-mat.soft2012★ 42 cited

Analytical model for flux saturation in sediment transport

Thomas Pähtz, Eric J. R. Parteli, Jasper F. Kok +1

The transport of sediment by a fluid along the surface is responsible for dune formation, dust entrainment and for a rich diversity of patterns on the bottom of oceans, rivers, and…

math-ph2012★ 12 cited

Lyapunov spectra for all symmetry classes of quasi-one-dimensional disordered systems of non-interacting Fermions

Andreas W. W. Ludwig, Hermann Schulz-Baldes, Michael Stolz

A random phase property is proposed for products of random matrices drawn from any one of the classical groups associated with the ten Cartan symmetry classes of non-interacting di…

physics.flu-dyn2012★ 159 cited

Streamwise-localized solutions at the onset of turbulence in pipe flow

Marc Avila, Fernando Mellibovsky, Nicolas Roland +1

Although the equations governing fluid flow are well known, there are no analytical expressions that describe the complexity of turbulent motion. A recent proposition is that in an…

math.RT2012

Jantzen sum formula for restricted Verma modules over affine Kac-Moody algebras at the critical level

Johannes Kübel

For a restricted Verma module of an affine Kac-Moody algebra at the critical level we describe the Jantzen filtration and give an alternating sum formula which corresponds to the J…

physics.flu-dyn2012★ 101 cited

Permeability of porous materials determined from the Euler characteristic

Christian Scholz, Frank Wirner, Jan Götz +4

We study the permeability of quasi two-dimensional porous structures of randomly placed overlapping monodisperse circular and elliptical grains. Measurements in microfluidic device…