12,445 research outputs found

    Travel and Online Review Behavior

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    Understanding the generation of online reviews is a fundamental issue for firms to gain benefits from online reviews. Our study tries to investigate the antecedents of online review characteristics by figuring out the following two research questions: (1) Will travel influence consumers’ post-consumption behavior (i.e., consumers’ review behavior)? And if so, (2) will consumers’ social capital moderate the influence of travel on consumers’ review behavior? The results show that consumers on travel tend to give higher review ratings and are more possible to post pictures while writing online reviews; consumers’ social capital level exacerbates the positive influence of travel on review ratings and mitigates the positive impact of travel on review richness

    Instanton Effects in QCD Sum Rules for the 0++0^{++} Hybrid

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    In this paper, we study instanton contributions to the correlator of the hybrid current gqˉσμνGνμaTaqg\bar q \sigma_{\mu\nu}G^a_{\nu\mu}T^a q. These contributions are then included in a QCD sum-rule analysis of the isoscalar 0++0^{++} hybrid mass. We find a mass at 1.83 GeV for the (uˉug+dˉdg)/2(\bar uug+\bar ddg)/\sqrt{2} hybrid. However, for the sˉsg\bar ssg hybrid, we find the sum rules are unstable. We also study non-zero width effects, which affect the mass prediction. The mixing effects between these two states are studied and we find QCD sum rules support the existence of a flavor singlet hybrid with mass at around 1.9 GeV. Finally, we study the mixing effects between hybrid and glueball currents. The mixing between the (uˉug+dˉdg)/2(\bar uug+\bar ddg)/\sqrt{2}(sˉsg\bar ssg) and the glueball causes two states, one in the region 1.4-1.8 GeV(1.4-2.2 GeV), and the other in the range 1.8-2.2 GeV(2.2-2.6 GeV).Comment: 12 pages, revised versio

    Note on a non-critical holographic model with a magnetic field

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    We consider a noncritical holographic model constructed from an intersecting brane configuration D4/D4ˉ\bar{\rm{D4}}-D4 with an external magnetic field. We investigate the influences of this magnetic field on strongly coupled dynamics by the gauge/gravity correspondence.Comment: 18 pages, references added and typos revise

    (E)-N-Benzyl­ideneadamantan-1-amine

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    In the title compound, C17H21N, the dihedral angle between the benzene ring and the imine group (—N=) is 5.1 (4)°. In the adamantane group, the C—C—C bond angles range from 107.88 (19) to 111.33 (17)°. Only weak van der Waals inter­actions contribute to the contribute to the packing of the molecules in the crystal.
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