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Iasi, Romania

The Alexandru Ioan Cuza University is a public university located in Iași, Romania. The University of Iași, as it was named at first, is the oldest higher education institution in Romania, founded one year after the establishment of the Romanian state, by an 1860 decree of Prince Alexandru Ioan Cuza, under whom the former Academia Mihăileană was converted to a university.Its coat of arms with the Y shaped heraldic pall simbolizes the three initiatives which led to the foundation of the University: the Trei Ierarhi Collegium, the Academia Mihăileană, the University of Iași. The central element is the Bible, the classic emblem of higher education. The three shiny stars stand for the three faculties of the University at its foundation moment, Philosophy, Law and Theology, on blue and argent background, the same colors used on the Cuza family shield.In 2008, for the third year in a row, the Alexandru Ioan Cuza University was placed first in the national research ranking compiled on the basis of Shanghai criteria. The University is a member of some of the most important university networks and associations: the Coimbra Group , Utrecht Network, European University Association , International Association of Universities , University Agency of Francophony , the Network of Francophone Universities and also of the Universitaria Consortium .In the 2012 QS World University Rankings, it was included in Top 700 universities of the world. Another three Romanian universities have entered the prestigious top. Wikipedia.

Mangalagiu I.I.,Al. I. Cuza University
Current Organic Chemistry

Recent studies have centred on 1,2-diazines derivatives, which proved to be invaluable materials in the fields of medicine, opto-electronics and agriculture. 1,2-diazines were found to have pharmaceutical applications including a wide range of biological activities, such as antiviral and anticancer, antituberculosis, antimicrobials, antifungus, anti-inflammatory, antihypertensive, diuretics, antithrombics, anticoagulants, antidepressant, anxiolytics, anticonvulsant, analgesic, and anti-multiple sclerosis. Their applications in the field of electronics are mainly focused on highly fluorescent derivatives (with potential as sensors and biosensors, electroluminescent materials, lasers, and other semiconductor devices) and compounds with liquid crystal properties. Herbicidal activity and the grow up factor for plants are also reviewed. Microwave assisted organic synthesis (MAOS) has during the last years become an invaluable tool within chemistry research, which has shown to be a very efficient way towards the synthesis of many compounds. In this review, microwave assisted reactions of 1,2-diazine derivatives have been discussed, outlining an introduction to MW chemistry, N-alkylations, dipolar cycloadditions, cyclocondensations, transition-metal catalysed reactions, and nucleophilic substitution of 1,2- diazines. © 2011 Bentham Science Publishers Ltd. Source

Vacaru S.I.,Al. I. Cuza University
Classical and Quantum Gravity

A consistent theory of quantum gravity (QG) at Planck's scale almost surely contains manifestations of Lorentz local symmetry violations (LV) which may be detected at observable scales. This can be effectively described and classified by models with nonlinear dispersions and related Finsler metrics and fundamental geometric objects (nonlinear and linear connections) depending on velocity/momentum variables. We prove that the trapping brane mechanism provides an accurate description of gravitational and matter field phenomena with LV over a wide range of distance scales and recovering in a systematic way the general relativity and local Lorentz symmetries. In contrast to the models with extra spacetime dimensions, the Einstein-Finsler-type gravity theories are positive with nontrivial nonlinear connection structure, nonholonomic constraints and torsion induced by generic off-diagonal coefficients of metrics, and determined by the fundamental QG and/or LV effects. © 2011 IOP Publishing Ltd. Source

Barbu V.,Al. I. Cuza University
IEEE Transactions on Automatic Control

In this note, a stabilizing feedback boundary controller for the equilibrium solutions to parabolic equations with Dirichlet boundary control is designed. The feedback controller is expressed in terms of the eigenfunctions φj corresponding to unstable eigenvalues λj-j= 1N of the linearized equation. For d=1, this stabilizing procedure is applicable for N=1 only, while for d>1 it is of conditional nature requiring the independence of φ j partial n on the part of the boundary where the control is applied. © 1963-2012 IEEE. Source

Vacaru S.I.,Al. I. Cuza University
International Journal of Modern Physics D

We study the geometric and physical foundations of Finsler gravity theories with metric compatible connections defined on tangent bundles, or (pseudo) Riemannian manifolds, endowed with nonholonomic frame structure. Several generalizations and alternatives to Einstein gravity are considered, including modifications with broken local Lorentz invariance. It is also shown how such theories (and general relativity) can be equivalently re-formulated in Finsler like variables. We focus on prospects in modern cosmology and Finsler acceleration of Universe. EinsteinFinsler gravity theories are elaborated following almost the same principles as in the general relativity theory but extended to Finsler metrics and connections. Finally, some examples of generic off-diagonal metrics and generalized connections, defining anisotropic cosmological EinsteinFinsler spaces are analyzed; certain criteria for the Finsler accelerating evolution are formulated. © 2012 World Scientific Publishing Company. Source

Vacaru S.I.,Al. I. Cuza University
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

I do not agree with the authors of papers arXiv:0806.2184 and arXiv:0901.1023v1 (published in [Zhe Chang, Xin Li, Phys. Lett. B 668 (2008) 453] and [Zhe Chang, Xin Li, Phys. Lett. B 676 (2009) 173], respectively). They consider that "In Finsler manifold, there exists a unique linear connection - the Chern connection ... It is torsion freeness and metric compatibility ...". There are well-known results (for example, presented in monographs by H. Rund and R. Miron and M. Anastasiei) that in Finsler geometry there exist an infinite number of linear connections defined by the same metric structure and that the Chern and Berwald connections are not metric compatible. For instance, the Chern's one (being with zero torsion and "weak" compatibility on the base manifold of tangent bundle) is not generally compatible with the metric structure on total space. This results in a number of additional difficulties and sophistication in definition of Finsler spinors and Dirac operators and in additional problems with further generalizations for quantum gravity and noncommutative/string/brane/gauge theories. I conclude that standard physics theories can be generalized naturally by gravitational and matter field equations for the Cartan and/or any other Finsler metric compatible connections. This allows us to construct more realistic models of Finsler spacetimes, anisotropic field interactions and cosmology. © 2010 Elsevier B.V. All rights reserved. Source

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