4,867 research outputs found
Compressive Sensing for PAN-Sharpening
Based on compressive sensing framework and sparse reconstruction technology, a new pan-sharpening method, named Sparse Fusion of Images (SparseFI, pronounced as sparsify), is proposed in [1]. In this paper, the proposed SparseFI algorithm is validated using UltraCam and WorldView-2 data. Visual and statistic analysis show superior performance of SparseFI compared to the existing conventional pan-sharpening methods in general, i.e. rich in spatial information and less spectral distortion. Moreover, popular quality assessment metrics are employed to explore the dependency on regularization parameters and evaluate the efficiency of various sparse reconstruction toolboxes
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Rad54: the Swiss Army knife of homologous recombination?
Homologous recombination (HR) is a ubiquitous cellular pathway that mediates transfer of genetic information between homologous or near homologous (homeologous) DNA sequences. During meiosis it ensures proper chromosome segregation in the first division. Moreover, HR is critical for the tolerance and repair of DNA damage, as well as in the recovery of stalled and broken replication forks. Together these functions preserve genomic stability and assure high fidelity transmission of the genetic material in the mitotic and meiotic cell divisions. This review will focus on the Rad54 protein, a member of the Snf2-family of SF2 helicases, which translocates on dsDNA but does not display strand displacement activity typical for a helicase. A wealth of genetic, cytological, biochemical and structural data suggests that Rad54 is a core factor of HR, possibly acting at multiple stages during HR in concert with the central homologous pairing protein Rad51
O(\alpha_s) QCD Corrections to Spin Correlations in process at the NLC
Using a Generic spin basis, we present a general formalism of one-loop
radiative corrections to the spin correlations in the top quark pair production
at the Next Linear Collider, and calculate the O(\alpha_s) QCD corrections
under the soft gluon approximation. We find that: (a) in Off-diagonal basis,
the QCD corrections to () scattering
process increase the differential cross sections of the dominant spin component
() by
and depending on the scattering angle for
and 1 TeV, respectively; (b) in {Off-diagonal basis}
(Helicity basis), the dominant spin component makes up 99.8% () of
the total cross section at both tree and one-loop level for ,
and the Off-diagonal basis therefore remains to be the optimal spin basis after
the inclusion of QCD corrections.Comment: 12 pages, 4 figures, revised version (a few print mistakes are
corrected, some numerical results are modified, and Fig.4 is added
Diagnosis and treatment of intraocular tuberculosis
Tuberculosis(TB)is a chronic infectious disease with high rate of morbidity and mortality world wide, and it is easy to relapse. TB can involve multiple organs, when it infects eye, it can cause lesions in anterior segment, posterior segment and the accessory organs of the eye. The purpose of this paper is to describe the clinical manifestation of intraocular TB, its diagnosis and treatment
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