2,531 research outputs found
External Corporate Social Capital and Technology Innovation Performance: Conceptual Model and Empirical Analysis
Based on the research of relationship between corporate social capital and technology innovation, this paper raised conceptual models and theoretical assumptions of corporate social capital influencing technological innovation performance, and analyzed in depth how the corporate social capital affected corporate technology innovation performance by using resource acquisition, according to questionnaire survey and multiple regression analysis from 210 Chinese companies in Zhejiang Province
Jet fragmentation functions in proton-proton collisions using soft-collinear effective theory
The jet fragmentation function describes the longitudinal momentum
distribution of hadrons inside a reconstructed jet. We study the jet
fragmentation function in proton-proton collisions in the framework of
soft-collinear effective theory (SCET). We find that, up to power corrections,
the jet fragmentation function can be expressed as the ratio of the fragmenting
jet function and the unmeasured jet function. Using renormalization group
techniques, we are able to resum large logarithms of jet radii R in the
perturbative expansion of the cross section. We use our theoretical formalism
to describe the jet fragmentation functions for light hadron and heavy meson
production measured at the Large Hadron Collider (LHC). Our calculations agree
very well with the experimental data for the light hadron production. On the
other hand, although our calculations for the heavy meson production inside
jets are consistent with the PYTHIA simulation, they fail to describe the LHC
data. We find that the jet fragmentation function for heavy meson production is
very sensitive to the gluon-to-heavy-meson fragmentation function.Comment: 26 pages, 7 figures, published version at JHE
rMAPS: RNA map analysis and plotting server for alternative exon regulation.
RNA-binding proteins (RBPs) play a critical role in the regulation of alternative splicing (AS), a prevalent mechanism for generating transcriptomic and proteomic diversity in eukaryotic cells. Studies have shown that AS can be regulated by RBPs in a binding-site-position dependent manner. Depending on where RBPs bind, splicing of an alternative exon can be enhanced or suppressed. Therefore, spatial analyses of RBP motifs and binding sites around alternative exons will help elucidate splicing regulation by RBPs. The development of high-throughput sequencing technologies has allowed transcriptome-wide analyses of AS and RBP-RNA interactions. Given a set of differentially regulated alternative exons obtained from RNA sequencing (RNA-seq) experiments, the rMAPS web server (http://rmaps.cecsresearch.org) performs motif analyses of RBPs in the vicinity of alternatively spliced exons and creates RNA maps that depict the spatial patterns of RBP motifs. Similarly, rMAPS can also perform spatial analyses of RBP-RNA binding sites identified by cross-linking immunoprecipitation sequencing (CLIP-seq) experiments. We anticipate rMAPS will be a useful tool for elucidating RBP regulation of alternative exon splicing using high-throughput sequencing data
The anomalous top quark coupling tqg and tW production at the LHC
Many new physics models beyond the standard model () can give rise to the
large anomalous top couplings ( and ). We focus our attention on
these couplings induced by the topcolor-assisted technicolor () model and
the littlest Higgs model with -parity (called model), and consider
their contributions to the production cross section and the charge asymmetry
for production at the . We find that the anomalous top coupling
induced by these two kinds of new physics models can indeed generate sizable
charge asymmetry. The correction effects of the model on the production
cross sections of the processes and are significant large, which might be detected at the .Comment: Typos corrected, a few discussions adde
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