56 research outputs found
Hypergeometric Reduction Formulas Involving Roots of Unity
AbstractA special F(n−1)D, with variables (ω, ω2, ..., ω(n−1)), where ω = exp(2πi/n), is expressed in terms of gamma functions. This formula is used in the proof of a reduction formula for a certain n-dimensional power series with variables (x, ωx, ω2x, ..., ωn−1x). Further generalizations of the results are established. Similar results for F(n−1)C are discussed for n ≤ 4; the general case is an open problem
Neural correlates of coherence-break detection during reading of narratives
Article / Letter to editorInstituut Pedagogische Wetenschappe
Neural correlates of coherence-break detection during reading of narratives
Development Psychopathology in context: schoo
Plasmonic excitations in noble metals: The case of Ag
The delicate interplay between plasmonic excitations and interband
transitions in noble metals is described by means of {\it ab initio}
calculations and a simple model in which the conduction electron plasmon is
coupled to the continuum of electron-hole pairs. Band structure effects,
specially the energy at which the excitation of the -like bands takes place,
determine the existence of a subthreshold plasmonic mode, which manifests
itself in Ag as a sharp resonance at 3.8 eV. However, such a resonance is not
observed in the other noble metals. Here, this different behavior is also
analyzed and an explanation is provided.Comment: 9 pages, 8 figure
A study of the efficiency of the class of -states as a quantum channel
Recently, a new class of -states has been defined by Agarwal and Pati
\cite{agarwal} and it has been shown that they can be used as a quantum channel
for teleportation and superdense coding. In this work, we identify those
three-qubit states from the set of the new class of -states which are most
efficient or suitable for quantum teleportation. We show that with some
probability is best suited for
teleportation channel in the sense that it does not depend on the input state.Comment: 7 pages, Late
Genome-wide meta-analysis uncovers novel loci influencing circulating leptin levels.
Leptin is an adipocyte-secreted hormone, the circulating levels of which correlate closely with overall adiposity. Although rare mutations in the leptin (LEP) gene are well known to cause leptin deficiency and severe obesity, no common loci regulating circulating leptin levels have been uncovered. Therefore, we performed a genome-wide association study (GWAS) of circulating leptin levels from 32,161 individuals and followed up loci reaching P<10(-6) in 19,979 additional individuals. We identify five loci robustly associated (P<5 × 10(-8)) with leptin levels in/near LEP, SLC32A1, GCKR, CCNL1 and FTO. Although the association of the FTO obesity locus with leptin levels is abolished by adjustment for BMI, associations of the four other loci are independent of adiposity. The GCKR locus was found associated with multiple metabolic traits in previous GWAS and the CCNL1 locus with birth weight. Knockdown experiments in mouse adipose tissue explants show convincing evidence for adipogenin, a regulator of adipocyte differentiation, as the novel causal gene in the SLC32A1 locus influencing leptin levels. Our findings provide novel insights into the regulation of leptin production by adipose tissue and open new avenues for examining the influence of variation in leptin levels on adiposity and metabolic health
Multiwavelength observations of a TeV-Flare from W comae
We report results from an intensive multiwavelength campaign on the intermediate-frequency-peaked BL Lacertae object W Com (z = 0.102) during a strong outburst of very high energy gamma-ray emission in 2008 June. The very high energy gamma-ray signal was detected by VERITAS on 2008 June 7-8 with a flux F(>200 GeV) =(5.7 0.6) × 10-11 cm-2 s -1, about three times brighter than during the discovery of gamma-ray emission from W Com by VERITAS in 2008 March. The initial detection of this flare by VERITAS at energies above 200 GeV was followed by observations in high-energy gamma rays (AGILE; E γ≥ 100 MeV), X-rays (Swift and XMM-Newton), and at UV, and ground-based optical and radio monitoring through the GASP-WEBT consortium and other observatories. Here we describe the multiwavelength data and derive the spectral energy distribution of the source from contemporaneous data taken throughout the flare. © 2009. The American Astronomical Society. All rights reserved
Individual differences in reading comprehension. Reading Comprehension Symposium for Teachers, Driestar
Development Psychopathology in context: schoo
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