547 research outputs found
LNG_FEM: Generating graded meshes and solving elliptic equations on 2-D domains of polygonal structures
No full textLi, Hengguang; Nistor, Victor. (2007). LNG_FEM: Generating graded meshes and solving elliptic equations on 2-D domains of polygonal structures. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/5382
Pseudo-differential operators, heat calculus and index theory of groupoids satisfying the Lauter-Nistor condition
No full textIn this thesis, we study singular pseudo-differential operators defined by groupoids
satisfying the Lauter-Nistor condition, by a method parallel to that of manifolds
with boundary and edge differential operators. The example of the Bruhat sphere
is studied in detail. In particular, we construct an extension to the calculus of
uniformly supported pseudo-differential operators that is analogous to the calculus
with bounds defined on manifolds with boundary. We derive a Fredholmness criterion
for operators on the Bruhat sphere, and prove that their parametrices up to compact
operators lie inside the extended calculus; we construct the heat kernel of perturbed
Laplacian operators; and prove an Atiyah-Singer type renormalized index formula
for perturbed Dirac operators on the Bruhat sphere using the heat kernel method
A regularity result for the bound states of -body Schr\"odinger operators: Blow-ups and Lie manifolds
No full textWe prove regularity estimates in weighted Sobolev spaces for the
-eigenfunctions of Schr\"odinger type operators whose potentials have
inverse square singularities and uniform radial limits at infinity. In
particular, the usual -body Hamiltonians with Coulomb-type singular
potentials are covered by our result: in that case, the weight is
, where
is the usual euclidean distance to the union
of the set of collision planes . The
proof is based on blow-ups of manifolds with corners and Lie manifolds. More
precisely, we start with the radial compactification of the
underlying space and we first blow-up the spheres at infinity of the collision planes to
obtain the Georgescu-Vasy compactification. Then we blow-up the collision
planes . We carefully investigate how the Lie manifold
structure and the associated data (metric, Sobolev spaces, differential
operators) change with each blow-up. Our method applies also to higher order
differential operators, to certain classes of pseudodifferential operators, and
to matrices of scalar operators.Comment: Small changes, last preprint version before sending to publisher.
Appendices D and E only in preprint version, not publishe
Studiu privind posibilitatea implementarii balance scorecard-ului in universitati
No full textBalanced Scorecard is a new control tool in public entities, especially in universities. The aim of this paper is to analyze the possibility of implementation in Romanian universities. At an international level, this concept was used at the beginning by the private sector, followed by its usage by the public sector as well. In universities of the Anglo – Saxon states, there have been debates on the subject for a long period of time in relation to the opportunity of introducing this concept; these debates have been supported by pro and against arguments. At a national level, this concept is virtually unknown in the higher education state institution system. Through the present paper, we would like to test the opportunity of introducing the concept starting from the identification at a global level of the conditions and regulations specific to the Balanced Scorecard (BSC) concept. Our results will present the first overview of this new subject, which is not yet developed in Romania.Balanced Scorecard Concept, Public University, Managerial Accounting
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Public Services and the European Union ::Healthcare, Health Insurance and Education Services /
No full textPatients travelling abroad to receive medical treatment, healthcare providers wishing to establish their seat or to provide services abroad, and students travelling abroad for education were faced with different barriers which have been declared illegal by the Court of Justice of the European Union. Member States started to use market mechanisms in their welfare systems and this triggered the application of the European internal market and competition rules. Fears related to whether all these would endanger the well-functioning of the welfare services have been raised by Member States. Several conflicts took shape: between national social interests and European Union economic interests; between individual interests and national general interests; between regulation and deregulation, centralization and decentralization. The author shows that behind those fears actually protectionist measures are hidden and that the European Law provides sufficient safeguards for the national welfare systems. In particular academia professionals and practitioners will benefit from the approach taken in this book. Dr. Laura Nistor is a Policy Officer in the DG Enterprise and Industry of the European Commission, Brussels, Belgium
"On Approximation of the Solutions to Partial Differential Equations in Finance"
No full textThis paper proposes a general approximation method for the solutions to second-order parabolic partial differential equations (PDEs) widely used in finance through an extension of Léandre's approach(Léandre (2006,2008)) and the Bismut identiy(e.g. chapter IX-7 of Malliavin (1997)) in Malliavin calculus. We show two types of its applications, new approximations of derivatives prices and short-time asymptotic expansions of the heat kernel. In particular, we provide new approximation formulas for plain-vanilla and barrier option prices under stochastic volatility models. We also derive short-time asymptotic expansions of the heat kernel under general time-homogenous local volatility and local-stochastic volatility models in finance which include Heston (Heston (1993)) and (λ-)SABR models (Hagan et.al. (2002), Labordere (2008)) as special cases. Some numerical examples are shown.
Deep cranial epigastric artery perforator flap planning in pigs.
No full text(A) DCEAPf planning between the 2nd and 4th nipple line, centered on the deep cranial epigastric artery (DCEA) and including the medial and lateral row of skin perforators. ITA–internal thoracic artery; SCEV–superficial cranial epigastric vein; DIEA–deep inferior epigastric artery. (B) Dissection of lateral row of perforators. (C) Dissection of medial row perforators. Dotted line marks the incision along the anterior rectus muscle sheet. (D) Epigastric artery dissected and transected distal to the skeletonized perforators, with no sign of vessel spasm. Republished from personal archive under a CC BY license, with permission from Dr. Nistor Alexandru, original copyright 2016.</p
Valutare la vulnerabilità dei corpi idrici a scala locale
No full textIl progetto il progetto ha lo scopo di valutare la vulnerabilità delle risorse idriche potabili in funzione del cambiamento climatico e delle variazioni degli aspetti socio-economici della zona montana dell’Appennino della Regione Emilia Romagna. Tale vulnerabilità è intesa sia in termini quantitativi, come la disponibilità futura della risorsa idropotabile, che in termini qualitativi, intesa come futura potabilità della risorsa stessa.
Inoltre il progetto ha lo scopo di valutare la funzione dei servizi ecosistemici relativamente all’azione mitigatrice della vulnerabilità della risorsa idrica sotterranea e di fornire linee guida per una corretta regolamentazione dell’uso del suolo nelle zone di ricarica dei corpi idrici sotterranei in zone montane
Incorporating the Basic Elements of a First-degree Fuzzy Logic and Certain Elments of Temporal Logic for Dynamic Management Applications
No full textThe approximate reasoning is perceived as a derivation of new formulas with the corresponding temporal attributes, within a fuzzy theory defined by the fuzzy set of special axioms. For dynamic management applications, the reasoning is evolutionary because of unexpected events which may change the state of the expert system. In this kind of situations it is necessary to elaborate certain mechanisms in order to maintain the coherence of the obtained conclusions, to figure out their degree of reliability and the time domain for which these are true. These last aspects stand as possible further directions of development at a basic logic level. The purpose of this paper is to characterise an extended fuzzy logic system with modal operators, attained by incorporating the basic elements of a first-degree fuzzy logic and certain elements of temporal logic.Dynamic Management Applications, Fuzzy Reasoning, Formalization, Time Restrictions, Modal Operators, Real-Time Expert Decision System (RTEDS)
Should patients with CKD stage 5D and biochemical evidence of secondary hyperparathyroidism be prescribed calcimimetic therapy? An ERA-EDTA position statement
No full textThis paper reflects the position of the CKD-MBD workgroup, an official working group of ERA-EDTA and of the ERBP advisory board, the official guideline-producing body of ERA-EDTA, on the topic of the use of calcimimetics in patients with CKD stage 5D, as based on two recent meta-analysis
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