The non-mesonic weak decay of Λ–hypernuclei is studied within a one-mesonexchange potential supplemented by a chirally motivated two-pion-exchange mechanism. The effects of final state interactions on the outgoing nucleons are also taken into account. In view of the severe discrepancies between theoretical expectations and experimental data, particular attention is payed to the asymmetry of the...

Searching images based on descriptions of image attributes is an intuitive process that can be easily understood by humans and recently made feasible by a few promising works in both the computer vision and multimedia communities [4,7,9,11]. In this report, we describe some experiments of image retrieval methods that utilize weak attributes [11].

An approach to the acceleration of parametric weak classifier boosting is proposed. Weak classifier is called parametric if it has fixed number of parameters and, therefore, can be represented as a point in multidimensional space. Genetic algorithm is used to learn parameters of such classifier. Proposed approach also takes cases when effective algorithm for learning some of the classifier para...

I hereby present two different methods that will allow weak lensing shape measurements of galaxies combined with redshift information – 3D weak lensing – to constrain the dark energy equation of state. The two methods are the geometric ratio test (Taylor et al. 2007) and a shear harmonic test (Heavens et al. 2006). The results presented here use a Fisher matrix approach for each method to place...

This study explores three alternative econometric interpretations of dynamic, stochastic general equilibrium (DSGE) models. Under a strong econometric interpretation, these models provide likelihood functions for observed sequences of prices and quantities. Given this interpretation, most DSGE models are rejected using classical econometrics and assigned zero probability in a Bayesian approach....

There are a large number of problems of physical interest that can be formulated in the abstract setting in which the Lax-Milgram lemma is applied to an equation expressed in terms of an appropriate bilinear form to prove existence of a unique solution. The selection of the solution space and the bilinear form controls the PDE and boundary conditions that the solution will satisfy. We will give...

We construct a new type of q-Euler numbers and polynomials with weak weight α : E α n,q , E α n,q x , respectively. Some interesting results and relationships are obtained. Also, we observe the behavior of roots of the q-Euler numbers E α n,q and polynomials E α n,q x with weak weight α. By means of numerical experiments, we demonstrate a remarkably regular structure of the complex roots of q-E...

This paper tests how subjects behave in an intertemporal consumption/saving experiment when borrowing is allowed and whether subjects treat debt differently than savings. Two treatments create environments where either saving or borrowing is required for optimal consumption. Since both treatments share the same optimal consumption levels, observed consumption choices can be directly compared ac...

We take an approach to the Λ non-mesonic weak decay in nuclei based on the exchange of mesons. The one pion and one kaon exchange are considered, together with the exchange of two pions, either correlated, leading to an important scalar-isoscalar exchange (σ-like exchange), or uncorrelated (box diagrams). Constraints of chiral dynamics are used to generate these exchanges. A drastic reduction o...

abstract the association between neotyphodium spp. endophytes and cool-season grasses, particularly tall fescue (festuca arundinacea, schreb), represents a widespread type of mutualism in nature. numerous researches were performed about positive effect of symbiosis on plant resistance to different stresses but the role of symbiosis on nutrients uptake particularly potassium uptake and k-bearing...