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Search Results: 1 - 10 of 7089 matches for " Daniela Mihailescu "
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Exploring the Nature of Information Systems Development Methodology: A Synthesized View Based on a Literature Review  [PDF]
Daniela Mihailescu, Marius Mihailescu
Journal of Service Science and Management (JSSM) , 2010, DOI: 10.4236/jssm.2010.32033
Abstract: New Information Systems Development Methodologies (ISDMs) are suggested in the belief that their deployment would be beneficial to consultants in their work. A large number of ISDMs already exist but their value has been questioned and at the same time new methodologies continue to be introduced in an attempt to support and improve the practice of information systems development work. What is not always clear from current studies is that ISDM is a multi-perspective and cross-discipline phenomenon. Although a large amount of knowledge of ISDM is available, different disciplinary interests have resulted in fragmented assessments of it. This paper intends to identify theoretical perspectives applied in the conceptualization of ISDM. A review of the literature on ISDM was conducted and four different theoretical perspectives were identified: 1) system, 2) structure, 3) innovation, and 4) knowledge. While each perspective provides various overarching depictions of ISDM, the synthesized view of ISDM provided in this study reveals the complexities and ambiguities of a multifaceted phenomenon such as ISDM. Suggestions for an alternative conceptualization of ISDM are provided in an attempt to facilitate the investigation of ISDM.
Liliana Mihailescu,Nicolae Mihailescu
Citius Altius Fortius , 2009,
Abstract: The pedagogic concept of “education” represents the psychosocial activity which has a basic function the permanent formation – development of the personality with a view to its social integration, value orientated in accordance with the assumed purposes, achieved at the level of the correlation between the teacher and the subject, by contents and general forms in an open context (S., Cristea, 2004, p.15). Education is a system of actions exerted consciously and systematically concerning some persons or gropes of persons, in order to transform their personality according to some purposes to which they joined”.(I., Jinga, 2006, p.131)From the perspective of the psychological meaning, education is a human process of formation – development by using the internal resources of the human personality: cognitive, emotional and volitional structures, emotional ability and character resources. From the social point of view, education is seen as a product. It reflects a need of social nature which orientates the personality formation – development activity.Education is an indubitable social determination because it takes place in a social frame, expresses the ideal of the social system from the instructive prospect, answers to the social needs and is achieved with the help of the educational politics in special institutions. The concept and the functions of the education represent the social consequences of the engaged human formation-development activity (S., Cristea, 2004, p. 17). In the action of education all these can be expressed, from pedagogic prospect, in purposes terms of education:education’s ideal, education’s purposes (mission) and education’s objectives. From the perspective of thesociological sciences, the analysis of the education functions (C., Zamfir, 1987, 71-77) leads, by analogicaljudgment, to three categories of functions: general/basic function of the education, main functions of theeducation and derived functions of the education.On the base of the previous reference points, we can say that education manifests as an activity generated simultaneously biosocial and psycho-pedagogic needs, an activity engaged as a product and as aformation – development permanent process of the human personality.
Citius Altius Fortius , 2010,
Abstract: In the context that the management “in spreading everywhere in the modern society” (T. Gavril , V.Lefter, 2002) and that is “part of the every social institution” (P. Drucker) gets a major importance concerning the elaboration and promotion of the scientific research projects from superior education. The promotion of the managerial thinking in the framework of the (multiannual) scientific research projects fulfills major roles and generates a remarkable potential impact to some essential components, having effects in the positive and decisive influence of the work processes realized in systemic and synergic context in order to achieve the goal.Starting from the previous expressed premise that the management is part of any social institution, the promotion of the managerial thinking within the framework of the scientific research project concept realized by us was reflected by the content elements that will be revealed forward. In the framework of the conceptualization phase, by the promotion of the management through objectives, there were formulated five objectives that wereconsidered by us as necessary in order to achieve the purpose that results from the research project theme
Higher derivative free energy terms and interfacial curvatures
M. Mihailescu
Physics , 2007,
Abstract: High derivative terms do not play a major role in field theories because of the associated complexity and inherent difficulty in connecting these terms to physically measurable quantities. A role for higher derivative terms is analyzed for the case of field theories used to describe phase separated systems. In these theories, higher derivative terms are directly connected to an interfacial free energy which contains the mean and the Gaussian curvature and are shown to determine explicitly the shape of the interface.
Correlation functions for chiral primaries in D=6 Supergravity on $AdS_3 \times S^3$
Mihail Mihailescu
Physics , 1999, DOI: 10.1088/1126-6708/2000/02/007
Abstract: Six dimensional supergravities on $ADS_3 \times S^3$ present interest due to the role they play in the $AdS/CFT$ correspondence. The correspondence in this case states the equivalence between supergravity on the given background and a still unknown conformal field theory. The conformal field theory in question is expected to appear by deforming of the free conformal field theory on $S^N(T^4)$ in a way which preserves the superconformal symmetry. The purpose of this paper is to compute the first nontrivial corrections to the equations of motion for the chiral primary fields coming from supergravity. Using the methods already developed which involve nontrivial redefinitions of fields, we compute three-point correlation functions for scalar chiral primaries and notice similarities between their expressions and those obtained in the orbifold conformal field theory.
Dual Elliptic Primes and Applications to Cyclotomy Primality Proving
Preda Mihailescu
Mathematics , 2007,
Abstract: Two rational primes p, q are called dual elliptic if there is an elliptic curve E mod p with q points. They were introduced as an interesting means for combining the strengths of the elliptic curve and cyclotomy primality proving algorithms. By extending to elliptic curves some notions of galois theory of rings used in the cyclotomy primality tests, one obtains a new algorithm which has heuristic cubic run time and generates certificates that can be verified in quadratic time. After the break through of Agrawal, Kayal and Saxena has settled the complexity theoretical problem of primality testing, some interest remains for the practical aspect of state of the art implementable proving algorithms.
Cyclotomy Primality Proofs and their Certificates
Preda Mihailescu
Mathematics , 2007,
Abstract: The first efficient general primality proving method was proposed in the year 1980 by Adleman, Pomerance and Rumely and it used Jacobi sums. The method was further developed by H. W. Lenstra Jr. and more of his students and the resulting primality proving algorithms are often referred to under the generic name of Cyclotomy Primality Proving (CPP). In the present paper we give an overview of the theoretical background and implementation specifics of CPP, such as we understand them in the year 2007.
Seminar Notes on Open Questions in Iwasawa Theory - SNOQIT I: The $Λ[ G ]$-modules of Iwasawa theory II: Units and Kummer theory in Iwasawa extensions
Preda Mihailescu
Mathematics , 2010,
Abstract: In Part I we review some specific properties of the $\Lambda$-modules in Iwasawa theory, which add structure to the general properties of Noetherian $\Lambda$-torsion modules. Part II deals with Kummer theory and gives a detailed construction of the Iwasawa linear space. This provides a new, simpler proof of the conjectures of Leopoldt and Gross for CM extensions. Using a construction of Thaine, we then prove that $\lambda^+ = 0$ in these fields, thus proving a part of Greenberg's conjecture - the fact $\mu^+ = 0$ still has to be shown. In the Appendices we give some elementary partial proofs of the main facts proved using Iwasawa's linear space. These two papers do not give proofs for non CM fields, and the reader interested in methods for dealing with this case is referred to the "$T and T^*$" paper on this arxive. This methods will be integrated in the Snoqit series.
Approximations for Gibbs states of arbitrary Holder potentials on hyperbolic folded sets
Eugen Mihailescu
Mathematics , 2010,
Abstract: In the case of smooth non-invertible maps which are hyperbolic on folded basic sets $\Lambda$, we give approximations for the Gibbs states (equilibrium measures) of arbitrary H\"{o}lder potentials, with the help of weighted sums of atomic measures on preimage sets of high order. Our endomorphism may have also stable directions on $\Lambda$, thus it is non-expanding in general. Folding of the phase space means that we do not have a foliation structure for the local unstable manifolds (they depend on the whole past and may intersect each other both inside and outside $\Lambda$), and moreover the number of preimages remaining in $\Lambda$ may vary; also Markov partitions do not always exist on $\Lambda$. Our convergence results apply also to Anosov endomorphisms, in particular to Anosov maps on infranilmanifolds.
The Gross - Kuz'min conjecture for CM fields
Preda Mihailescu
Mathematics , 2011,
Abstract: Let $A' = \varprojlim_n$ be the projective limit of the $p$-parts of the ideal class groups of the $p$ integers in the $\Z_p$-cyclotomic extension $\K_{\infty}/\K$ of a CM number field $\K$. We prove in this paper that the $T$ part $(A')^-(T) = 0$. This fact has been explicitly conjecture by Kuz'min in 1972 and was proved by Greenberg in 1973, for abelian extensions $\K/\Q$. Federer and Gross had shown in 1981 that $(A')^-(T) = 0$ is equivalent to the non-vanishing of the $p$-adic regulator of the $p$-units of $\K$.
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