A common feature of survival data is the presence of censoring and non-normality. It is inappropriate to analyze survival data by the conventional statistical methods such as linear regression or logistic regression, because of the characteristics of the survival data. When censoring, survival time can’t be considered as a continuous variable. Linear regression, in which to compare mean time-to...

Current fragmentation in semiinclusive deep inelastic leptoproduction offers, besides refinement of inclusive measurements such as flavor separation and access to the chiral-odd quark distribution functions hq1(x) = δq(x), the possibility to investigate intrinsic transverse momentum of hadrons via azimuthal asymmetries. LEADING QUARK DISTRIBUTION FUNCTIONS In deep-inelastic leptoproduction (DIS...

We consider a symmetric Anderson impurity model with a soft-gap hybridization vanishing at the Fermi level, ∆I ∝ |ω|r with r > 0. Three facets of the problem are examined. First the non-interacting limit, which despite its simplicity contains much physics relevant to the U > 0 case: it exhibits both strong coupling (SC) states (for r < 1) and local moment states (for r > 1), with characteristic...

We construct, using fermionic functional integrals, thermodynamic Green's functions for a weakly coupled fermion gas whose Fermi energy lies in a gap. Estimates on the Green's functions are obtained that are characteristic of the size of the gap. This prepares the way for the analysis of single scale renormalization group maps for a system of fermions at temperature zero without a gap.

Complicated potential structure formed at a constriction of positive column of a DC discharge with heated cathode in He at low discharge currents is investigated. According to the potential structure, electrons and ions are accelerated by the electric field and their energy distribution functions acquire multi humped shapes. Additional maximums on distribution functions quickly disappear due to...

Recent measurements for F2(x, Q ) have been analyzed in terms of the ‘dynamical’ and ‘standard’ parton model approach at NLO and NNLO of perturbative QCD. Having fixed the relevant NLO and NNLO parton distributions, the implications and predictions for the longitudinal structure function FL(x,Q ) are presented. It is shown that the previously noted extreme perturbative NNLO/NLO instability of F...