We use the vector wedge product in geometric algebra to show that Poisson commutator brackets measure preservation of phase space areas. We also use the vector dot product to define the Poisson anticommutator bracket that measures the preservation of phase space angles. We apply these brackets to the paraxial meridional complex height-angle ray vectors that transform via a 2×2 matrix, and we sh...

In this paper, we present a comparison of two implementations of our proposed MDA approach for managing variability in a software product line. The implementations correspond to two representative frameworks based on the Model Driven Engineering (MDE) principles. These frameworks are the Graphical Modeling Framework (GMF) and the Generic Model Environment (GME). We built the core assets of the ...

The c-abl proto-oncogene encodes a cytoplasmic tyrosine kinase which is homologous to the src gene product in its kinase domain and in the upstream kinase regulatory domains SH2 (src homology region 2) and SH3 (src homology region 3). The murine v-abl oncogene product has lost the SH3 domain as a consequence of N-terminal fusion of gag sequences. Deletion of the SH3 domain is sufficient to rend...

M odel-driven software product lines (MD-SPLs) are created from domain models w hich are transformed, merged and composed w ith reusable core assets, until software products are produced. Model transformation chains (MTCs) must be specified to generate such M D-SPLs. This paper presents a framew ork for creating platform-independent M D-SPLs; such framew ork includes a domain specific language ...

The mesophile Acinetobacter sp. strain BD413 and the extreme thermophile Thermus thermophilus HB27 display high frequencies of natural transformation. In this study we identified and characterized a novel competence gene in Acinetobacter sp. strain BD413, comA, whose product displays significant similarities to the competence proteins ComA and ComEC in Neisseria and Bacillus species. Transcript...

ClpC of Bacillus subtilis, controlling competence gene expression and survival under stress conditions, is encoded by the fourth gene of a six-gene operon. The product of orf1 contains a potential helix-turn-helix motif, but shows no significant similarities with known protein sequences. The second and third genes encode proteins with similarities to zinc-finger proteins (orf2) and arginine kin...

The Tensor Product model transformation is a numerical method that is capable of uniformly transforming LPV (linear parameter-varying) dynamic models into polytopic forms, both in a theoretical and algorithmic context. Using the TP model transformation, different optimization and convexity constraints can be considered, and transformations can be executed without any analytical interactions, wi...

In this paper, a novel algorithm is proposed to transform a ROM diagram obtained from a design text into a FBS model. Each state of the transformation process is defined by four features: ROM (Recursive Object Model), POS (Part of Speech), PES (Product–Environment System), and FBS (Function–Behavior–State). The transformation algorithm is thus constituted by transition rules which change one tr...

cacl2 treatment followed by heat shock is the most common method for artificial transformation. here, the cells were transformed using cacl2 treatment either with heat shock (standard protocol) or without heat shock (lab protocol) to comprehend the difference in transformation efficiency. the bl21 strain of escherichia coli (e. coli) was being susceptible using cacl2 treatment. some cells were ...