introduction: today the prevalence of teeth decays has considerably decreased. related organizations and institutions mention several reasons for it such as improvement of decay diagnostic equipment and tools which are even capable of detecting caries in their initial stages. this resulted in reduction of costs for patients and remarkable increase in teeth life span. there are many methods for ...

In this research, a semi empirical approach has been suggested for calculating the activation energyof unimolecular thermal decomposition of vinyl ethers yielding saturated products. The calculationprocedure is based on the use of molecular mechanics (MM) methods. These methods which involvethe construction of the transition state for a molecule mainly consider the formation of a “HydrogenBridg...

Martin Beneke, 2 Yuichiro Kiyo, Peter Marquard, Alexander Penin, Jan Piclum, 2 Dirk Seidel, and Matthias Steinhauser Physik Department T31, James-Franck-Straße 1, Technische Universität München, 85748 Garching, Germany Institut für Theoretische Teilchenphysik und Kosmologie, RWTH Aachen, 52056 Aachen, Germany Department of Physics, Juntendo University, Inzai, Chiba, Japan Deutsches Elektronen S...

In the Minimal Supersymmetric Standard Model, neutralinos lighter than 50 GeV are compatible with all accelerator, precision, and cosmological bounds. Such neutralinos might constitute a relevant decay channel for the Higgs boson, modifying its expected signatures at hadron colliders. We study the branching ratio h → χχ and determine the region in the supersymmetric parameter space where it is ...

Marketing strategists should create, maintain, and arrest the decay of causally ambiguous resource competences that lead to competitiveness and thus performance. However, competence causal ambiguity, which helps create competitiveness, is also implicated in competitiveness decay. In this study we test a model of specializationcompetitiveness-performance using primary and secondary data from 169...

We present preliminary results for the decay constant of the Bs meson, fBs , at three values of β = 5.7, 6.0 and 6.2 using NRQCD and clover fermions for the heavy and light quarks respectively. As a consistency check the decay constant has also been extracted from the axial-vector current at finite momentum. In addition, we discuss the cancellation of O(α/(aM0)) terms and the remaining uncertai...

We propose to study factorization breaking effects in exclusive b decays where they are strongly enhanced over the factorizing contributions. This can be done by selecting final-state mesons with a small decay constant or with spin greater than one. We find a variety of decay modes which could help understand the dynamical origin of factorization and the mechanisms responsible for its breaking....

We present a detailed study, done in the framework of the INFN 2006 Roadmap, of the prospects for e + e − physics at the Frascati National Laboratories. The physics case for an e + e − collider running at high luminosity at the φ resonance energy and also reaching a maximum center of mass energy of 2.5 GeV is discussed, together with the specific aspects of a very high luminosity τ-charm factor...