Abstract The quasi-SU(3) symmetry was uncovered in full pf and sdg shell-model calculations for both even-even [1] and odd-even nuclei [2]. It manifests itself through a dominance of single-particle and quadrupole-quadrupole terms in a Hamiltonian used to describe welldeformed nuclei. A practical consequence of the quasi-SU(3) symmetry is an efficient basis truncation scheme. In [3] it is shown...

INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 597 Linkage intensity between the factor pairs Su su and Ta tu in maize. .................... 598 The relative frequency of crossing over between S, su and Tu tu in megaspore and microspore development. ...................................................

Because of the problems arising from the fermion unification in the traditional Grand Unified Theory and the mass hierarchy between the 4-dimensional Planck scale and weak scale, we suggest the low energy gauge unification theory with low high-dimensional Planck scale. We discuss the non-supersymmetric SU(5) model on M × S/Z2 × S/Z2 and the supersymmetric SU(5) model on M × S/(Z2 × Z ′ 2) × S/(...

Starting from suitable maps of the form :S n !SU(m), for large m, we obtain functions :S n ?!SU(k) that generate n SU(k), for certain n and k. We have used this method in elementary algebraic topology courses for purposes of illustration, since it requires no machinery beyond the homotopy exact sequence of brations and provides an insight about the Bott periodicity theorems.

the main purpose of the study is determination of the pollutants hazard potential as well as environmental vulnerability of qarah su river. first the most significant pollutant sources in the qarah su river watershed were identified and then accordingly the pollution hazard potential rate was calculated in universal ranking system model setting. then, by generalizing the algebraic sum of the re...

Using split-quaternions, we find explicit SDYM SU(1, 1) instanton solutions in S2 −×S 2 + which is the conformal compactification of the semi-Euclidean 4-spacetime R 2+2 of split-signature (−,−,+,+). The noncompact Lie group SU(1, 1) is naturally introduced as an appropriate gauge group for SDYM instantons in S2 −×S 2 +. It is shown that SDYM and ASDYM SU(1, 1) instanton solutions in S2 −×S 2 +...

We present a composite model of quarks with the ‘effective supersymmetry’. The model is based on the gauge group (SU(2)S × SU(2)M) × (SU(2)U × SU(2)C × SU(2)T )× SU(5)SM , where SU(5)SM is the standard model gauge group. In the dynamical supersymmetry breaking sector based on the gauge group SU(2)S × SU(2)M , the supersymmetry is dynamically broken. The preon sector is constructed by the model ...

We present a new mechanism for baryogenesis by introducing a heavy vector-like SU(2)W singlet quark(s) with Qem = 2 3 quark U or Qem = −13 quark D. The lifetime of the heavy quark is assumed to be in the range 2 × 10−11 s < τ < 1 s. Being SU(2)W singlet, it survives the electroweak phase transition era. It mixes with SU(2)W doublet quarks with tiny mixing angles to satisfy the FCNC constraints,...

a m i t r a z, a n i ns e c t i c i d e /a ca ri c i de of the f o r m a m i d i n e p e st i c i d e s group, is a ? 2 a d r e n e r g i c ag on i st a nd of t he a m i d i ne c h e m i ca l f a m il y generally us e d to c o n t r ol animal e c top a r a s i t e s. poisoning due to am i t r a z i s r a r e and characterized by c e nt r a l n e r v ous s y st e m a nd r e sp ir a to r y d e p ...

We formulate models of complex scalar fields in the space-time that has a twodimensional sphere as extra dimensions. The two-sphere S is assumed to have the Dirac-Wu-Yang monopole as a background gauge field. The nontrivial topology of the monopole induces topological defects, i.e. vortices, in the scalar field. When the radius of S is larger than a critical radius, the scalar field develops a ...