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Search Results: 1 - 10 of 675 matches for " Gergely Feher "
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Clinical importance of aspirin and clopidogrel resistance
Gergely Feher,Andrea Feher,Gabriella Pusch,Katalin Koltai
World Journal of Cardiology , 2010,
Abstract: Aspirin and clopidogrel are important components of medical therapy for patients with acute coronary syndromes, for those who received coronary artery stents and in the secondary prevention of ischaemic stroke. Despite their use, a significant number of patients experience recurrent adverse ischaemic events. Interindividual variability of platelet aggregation in response to these antiplatelet agents may be an explanation for some of these recurrent events, and small trials have linked “aspirin and/or clopidogrel resistance”, as measured by platelet function tests, to adverse events. We systematically reviewed all available evidence on the prevalence of aspirin/clopidogrel resistance, their possible risk factors and their association with clinical outcomes. We also identified articles showing possible treatments. After analyzing the data on different laboratory methods, we found that aspirin/clopidogrel resistance seems to be associated with poor clinical outcomes and there is currently no standardized or widely accepted definition of clopidogrel resistance. Therefore, we conclude that specific treatment recommendations are not established for patients who exhibit high platelet reactivity during aspirin/clopidogrel therapy or who have poor platelet inhibition by clopidogrel.
Lucr?ri ?tiin?ifice : Management Agricol , 2009,
Abstract: Because Romania is an EU-member country since 2007, obviously it must, in concordance with the adhesion agreement, align” to the financing systems of agriculture and rural development practised in the European Union. Under the context of the financial PAC reforms, available for our country, too, the financing of the Romanian agriculture is made with European Union funds, and also with funds from the state budget (public funds) directed in supporting programs for farmers. In the conditions mentioned above, PAC implementation in Timi County aim at the adoption of farmer-supporting mechanisms at territorial level and their impact on holding development.
Generalized Drinfeld-Sokolov Hierarchies and W-Algebras
L. Feher
Physics , 1992,
Abstract: We review the construction of Drinfeld-Sokolov type hierarchies and classical W-algebras in a Hamiltonian symmetry reduction framework. We describe the list of graded regular elements in the Heisenberg subalgebras of the nontwisted loop algebra based on $gl_n$ and deal with the associated hierarchies. We exhibit an $sl_2$ embedding for each reduction of a Kac-Moody Poisson bracket algebra to a W-algebra of gauge invariant differential polynomials.
KdV type systems and W-algebras in the Drinfeld-Sokolov approach
Laszlo Feher
Physics , 1995,
Abstract: The generalized Drinfeld-Sokolov construction of KdV systems is reviewed in the case of an arbitrary affine Lie algebra paying particular attention to Hamiltonian aspects and $\W$-algebras. Some extensions of known results as well as a new interpretation of the construction are also presented.
Wakimoto realizations of current and exchange algebras
L. Feher
Physics , 1998, DOI: 10.1023/A:1021684501505
Abstract: Working at the level of Poisson brackets, we describe the extension of the generalized Wakimoto realization of a simple Lie algebra valued current, J, to a corresponding realization of a group valued chiral primary field, b, that has diagonal monodromy and satisfies $Kb'=Jb$. The chiral WZNW field b is subject to a monodromy dependent exchange algebra, whose derivation is reviewed, too.
Dynamical r-matrices and Poisson-Lie symmetries in the chiral WZNW model
L. Feher
Physics , 2002,
Abstract: We briefly review the possible Poisson structures on the chiral WZNW phase space and discuss the associated Poisson-Lie groupoids. Many interesting dynamical r-matrices appear naturally in this framework. Particular attention is paid to the special cases in which these r-matrices satisfy the classical dynamical Yang-Baxter equation or its Poisson-Lie variant.
Poisson-Lie dynamical r-matrices from Dirac reduction
L. Feher
Physics , 2004, DOI: 10.1007/s10582-004-9788-9
Abstract: The Dirac reduction technique used previously to obtain solutions of the classical dynamical Yang-Baxter equation on the dual of a Lie algebra is extended to the Poisson-Lie case and is shown to yield naturally certain dynamical r-matrices on the duals of Poisson-Lie groups found by Etingof, Enriquez and Marshall in math.QA/0403283.
Dynamical r-matrices and the chiral WZNW phase space
L. Feher
Physics , 2001, DOI: 10.1134/1.1490103
Abstract: The dynamical generalization of the classical Yang-Baxter equation that governs the possible Poisson structures on the space of chiral WZNW fields with generic monodromy is reviewed. It is explained that for particular choices of the chiral WZNW Poisson brackets this equation reduces to the CDYB equation recently studied by Etingof--Varchenko and others. Interesting dynamical r-matrices are obtained for generic monodromy as well as by imposing Dirac constraints on the monodromy.
An application of the reduction method to Sutherland type many-body systems
L. Feher
Physics , 2013,
Abstract: We study Hamiltonian reductions of the free geodesic motion on a non-compact simple Lie group using as reduction group the direct product of a maximal compact subgroup and the fixed point subgroup of an arbitrary involution commuting with the Cartan involution. In general, we describe the reduced system that arises upon restriction to a dense open submanifold and interpret it as a spin Sutherland system. This dense open part yields the full reduced system in important special examples without spin degrees of freedom, which include the BC(n) Sutherland system built on 3 arbitrary couplings for m
Action-angle map and duality for the open Toda lattice in the perspective of Hamiltonian reduction
L. Feher
Mathematics , 2013, DOI: 10.1016/j.physleta.2013.09.008
Abstract: An alternative derivation of the known action-angle map of the standard open Toda lattice is presented based on its identification as the natural map between two gauge slices in the relevant symplectic reduction of the cotangent bundle of $GL(n,{{\mathbb R}})$. This then permits to interpret Ruijsenaars' action-angle duality for the Toda system in the same group-theoretic framework which was established previously for Calogero type systems.
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