نتایج جستجو برای: s sign
تعداد نتایج: 761734 فیلتر نتایج به سال:
Using both two orbital and five orbital models, we investigate the quasiparticle interference QPI patterns in the superconducting SC state of iron-based superconductors. We compare the results for nonmagnetic and magnetic impurities in sign-changed s-wave cos kx · cos ky and sign-unchanged cos kx · cos ky SC states. While the patterns strongly depend on the chosen band structure details, the se...
Streptococcus pneumoniae is a microorganism that frequently causes serious infections in children, the elderly, and immunocompromised patients. We studied whether the specific intracellular adhesion molecule-grabbing nonintegrin R1 (Sign-R1) receptor, involved in the uptake of capsular polysaccharides (caps-PS) by antigen-presenting cells, is necessary for the antibody response to pneumococcal ...
The origin of superconductivity in the iron pnictides remains unclear. One suggestion is that superconductivity in these materials has a magnetic origin, which would imply a sign-reversal s(±) pairing symmetry. Another suggests it is the result of orbital fluctuations, which would imply a sign-equal s(++) pairing symmetry. There is no consensus yet which of these two distinct and contrasting pa...
We consider the eigenvalue-eigenvector problem where p 1 p m?1 = r. We prove an analogue of the classical Gantmacher{Krein Theorem for the eigenvalue-eigenvector structure of STP matrices in the case where p i 1 for each i, plus various extensions thereof. A matrix A is said to be strictly totally positive (STP) if all its minors are strictly positive. STP matrices were independently introduced...
We introduce a generalization of alternating sign matrices (ASMs) called multiASMs and develop some their properties. Classes with specified row column sum vectors $R$ $S$ extend the classes $(0,1)$-matrices $S$. The special case when $R=S$ is constant vector, in particular all 2's, treated more detail. also investigate polytope spanned by class multiASMs. Finally, we discuss possibility defini...
We consider a family of s polynomials, P = fP ; . . . ; P g; in k variables with coefficients in a real closed field R; each of degree at most d; and an algebraic variety V of real dimension k which is defined as the zero set of a polynomial Q of degree at most d. The number of semi-algebraically connected components of all non-empty sign conditions on P over V is bounded by s (O(d)) . In this ...
The lectins DC-SIGN and DC-SIGNR can augment viral infection; however, the range of pathogens interacting with these attachment factors is incompletely defined. Here we show that DC-SIGN and DC-SIGNR enhance infection mediated by the glycoprotein (GP) of Marburg virus (MARV) and the S protein of severe acute respiratory syndrome coronavirus and might promote viral dissemination. SIGNR1, a murin...
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