background: there is a conserved portion in the 16s rrna gene of bacteria which can be amplified by the universal pcr method. this fragment is 996 bp in length. in this method, only one set of universal primers is used for the amplification of the conserved region of the 16s rrna gene, in common bacterial pathogens. therefore, using the universal pcr method, these bacteria are detectable only b...

the dopamine has been studied theoretically at the b3lyp/6-31g* level were performed in gasphase. we calculated physical parameters like atomic charges, energy (=>), asymmetry parameter(?), chemical shift @iso, dipole moment and isotropic nmr determinant and in this work we usedgaussian 03 at nmr and calculation by using b3lyp methods with 6-31g* basis set.

A non-standard bifurcation, similar to a transcritical one, in a model of a bioreactor has been detected. This happens in a periodically-forced system with restrictions on the state space. The bioreactor is periodically fed with substrate. In the mathematical model, a periodic orbit approaches (without hitting) the restriction surface as a bifurcation parameter is varied. The way the orbit appr...

The question if a given partial solution to problem can be extended reasonably occurs in many algorithmic approaches for optimization problems. For instance, when enumerating minimal vertex covers of graph G=(V,E), one usually arrives at the decide set U?V (pre-solution), there exists cover S (i.e., S?V such that no proper subset is cover) with U?S (minimal extension U). We propose general, par...

We develop a specification test for the independent instrument assumption in the sample selection model. We test the emptiness of the identification region of Manski (2003): the set of outcome distributions that are compatible with data and the restriction of statistical independence between the instrument and outcome. The size of the identification region is characterized by a scalar parameter...

This paper considers a method of image recognition, which is produced by the transformation of the object into a set of functions representing the area of intersection of the figure and its copy at its shift in one direction. The object of this research is image shapes of individual objects in the visual picture. The efficiency of different methods of optical image recognition has been conducte...

Settling a ten years open question, we show that the NPcomplete Feedback Vertex Set problem is deterministically solvable in O(c ·m) time, where m denotes the number of graph edges, k denotes the size of the feedback vertex set searched for, and c is a constant. As a second result, we present a fixed-parameter algorithm for the NPcomplete Edge Bipartization problem with runtime O(2 ·m).

Let (U,S, d) be an instance of Set Cover Problem, where U = {u1, ..., un} is a n element ground set, S = {S1, ..., Sm} is a set ofm subsets of U satisfying ⋃m i=1 Si = U and d is a positive integer. In STOC 1993M. Bellare, S. Goldwasser, C. Lund and A. Russell proved the NPhardness to distinguish the following two cases of GapSetCoverη for any constant η > 1. The Yes case is the instance for wh...

We propose a solution strategy for parameter estimation, where we combine adaptive multiscale estimation (AME) and level-set estimation (LSE). The approach is applied to the nonlinear inverse problem of recovering a coefficient function in a system of differential equations from spatially sparsely distributed measurement data. The specific equations considered in this paper describe two-phase p...

Complementing recent progress on classical complexity and polynomial-time approximability of feedback set problems in (bipartite) tournaments, we extend and partially improve fixed-parameter tractability results for these problems. We show that Feedback Vertex Set in tournaments is amenable to the novel iterative compression technique. Moreover, we provide data reductions and problem kernels fo...