نتایج جستجو برای: su
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We discuss the phenomenological implications of an approximate SU(6) x SU(6) x U(1) symmetry of hadron physics which remains after dynamical symmetry breaking in the strong-coupling lattice gauge theory. This symmetry is similar to but differs in an essential fashion from . previous versions of SU(6) x SU(6) or SU(6)W. The difference resolves some of the problems of the older schemes-for exampl...
In this paper, we propose a new multiple-level power allocation strategy for the secondary user (SU) in cognitive radio (CR) networks. Different from the conventional strategies, where SU either stays silent or transmit with a constant/binary power depending on the busy/idle status of the primary user (PU), the proposed strategy allows SU to choose different power levels according to a carefull...
SU(3) and SU(4) recoupling are used to develop technique° for the calculation of norm and overlap matrix element° for properly antisymmetrized cluster wave function°. These techniques are illustrated in detail by the calculation of a and °13e cluster amplitude° for °fate° of a few ~ excitation in s-d shell nuclei. These extend earlier SU(3) strong coupling results for states of highest intrinsi...
The su x tree of a string is the fundamental data structure of combinatorial pattern matching. In this paper, we present a novel, deterministic algorithm for the construction of su x trees. We settle the main open problem in the construction of su x trees: we build su x trees in linear time for integer alphabet.
Abstract This paper introduces a novel technique that enables access by a cognitive secondary user (SU) to a spectrum occupied by an incumbent primary user (PU) that employs Type-I Hybrid ARQ. The technique allows the SU to perform selective retransmissions of SU data packets that have not been successfully decoded in the previous attempts. The temporal redundancy introduced by the PU ARQ proto...
BACKGROUND Factors influencing access to stroke unit (SU) care and data on quality of SU care in Germany are scarce. We investigated characteristics of patients directly admitted to a SU as well as patient-related and structural factors influencing adherence to predefined indicators of quality of acute stroke care across hospitals providing SU care. METHODS Data were derived from the German S...
BACKGROUND Establishing a stroke unit (SU) in every hospital may be infeasible because of limited resources. In Australia, it is recommended that hospitals that admit ≥100 strokes per year should have a SU. We aimed to describe differences in processes of care and outcomes among hospitals with and without SUs admitting at least 100 patients/year. METHODS National stroke audit data of 40 conse...
Pulmonary vasoreactivity could determine the responsiveness to vasodilators and, in turn, the prognosis of pulmonary hypertension (PH). We hypothesized that pulmonary vasoreactivity is impaired, and we examined the underlying mechanisms in the Sugen-hypoxia rat model of severe PH. Male Sprague-Dawley rats were injected with Sugen (20 mg/kg s.c.) and exposed to hypoxia (9% O2) for 3 weeks, follo...
I consider a class of Grand Unified models, in which E8 is broken to SU(3)× SU(2)× SU(2)× SU(2)×U(1)Y , then to SU(3)× SU(2)diag ×U(1)Y . The breaking of (SU(2)) to SU(2)diag reduces the SU(2) coupling constant, at unification, by a factor of 1/ √ 3, so that the ratio of the SU(3) and SU(2)diag coupling constants, at unification, is equal to the ratio observed at about 1 TeV. By choosing a suit...
Introduction: The capability of applying time management skill, is an important factor in academic and non-academic achievements. This study was performed to investigate the relationship between time management and academic achievement of master and bachelor students of Shiraz University (SU) and Shiraz University of Medical Sciences (SUMS). Methods: In this descriptive cross sectional study, 6...
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