One of the important issues in the study of steel frames is to find a suitable formulation for semi-rigid connections. In this paper, the explicit stiffness matrix for a two-dimensional beam-column element having end-flexibilities is derived. The effects of the lateral uniformly distributed load on the deflection are considered. Both tensile and compressive axial loads are also taken into accou...

The rpoN gene (encoding the sigma factor sigma 54) of Escherichia coli was cloned and its nucleotide sequence determined. Promoter probe analysis confirmed the presence of a promoter in a 350 bp fragment covering the start of rpoN. The likely promoter was identified. The nucleotide sequence of the region extending 2.1 kb downstream of rpoN was also determined. This region contained four open re...

Spontaneous breakdown of the continuous symmetry is studied in the framework of discretized light-front quantization. We consider linear sigma model in 3+1 dimension and show that the careful treatment of zero modes together with the regularization of the theory by introducing NG boson mass leads to the correct description of Nambu-Goldstone phase on the light-front. Recently the light-front (L...

The recent and surprising discovery of widespread NIRVs (non-retroviral integrated RNA viruses) has highlighted the importance of genomic interactions between non-retroviral RNA viruses and their eukaryotic hosts. Among the viruses with integrated representatives are the rhabdoviruses, a family of negative sense single-stranded RNA viruses. We identify sigma virus-like NIRVs of Drosophila spp. ...

We study the two loop quantum equivalence of sigma models related by Buscher’s T-duality transformation. The computation of the two loop perturbative free energy density is performed in the case of a certain deformation of the SU(2) principal sigma model, and its T-dual, using dimensional regularization and the geometric sigma model perturbation theory. We obtain agreement between the free ener...

We review some results concerning the properties of static, spherically symmetric solutions of multidimensional theories of gravity: various scalar-tensor theories and a generalized string-motivated model with multiple scalar fields and fields of antisymmetric forms associated with p-branes. A Kaluza-Klein type framework is used: there is no dependence on internal coordinates but multiple inter...

In this paper we will look at the connection of frames and finite dimensionality. We develop algorithms, which are avaiable online. The main result is a way to ’switch’ between different frames, giving an algorithm to calculate the coefficients of one frame given the analysis of another frame using their cros-Gramm matrix. This is a canonical extension of the basic transformation matrix used fo...