Search results for " GRADE"

showing 10 items of 178 documents

Elaboration of metal / ceramic functionally graded materials by SPS for ballistic protection

2016

The objective is to improve ballistic performance of armors. A perfect armor combines ductility to resistto the impact and high hardness to stop projectile’s fragments. However, such an association of properties is inconsistent witha single material. The solution is to perform a functionally graded material (FGM) with a ductile metal at the back side of thesample and a hard ceramic on the top side. Non-conventional technologies like Spark Plasma Sintering allow joining orsintering all types of materials with different and additional properties. Furthermore, with this technique, high heating ratescan be achieved, limiting grain growth and resulting in a fine microstructure. The goal is to st…

Ceramic/metalMatériau à gradient de fonction[CHIM.THEO] Chemical Sciences/Theoretical and/or physical chemistryFunctionally graded materialSpark Plasma SinteringCéramique/métal
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Y-proper graded cocharacters and codimensions of upper triangular matrices of size 2, 3, 4

2012

Abstract Let F be a field of characteristic 0. We consider the upper triangular matrices with entries in F of size 2, 3 and 4 endowed with the grading induced by that of Vasilovsky. In this paper we give explicit computation for the multiplicities of the Y -proper graded cocharacters and codimensions of these algebras.

CombinatoricsSettore MAT/02 - AlgebraAlgebra and Number TheoryMathematics::Commutative AlgebraGraded identitiesComputationPolynomial identities graded identitiesTriangular matrixPolynomial identitiesMathematicsJournal of Algebra
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Impact of Metabolic Syndrome on Coronary Microvascular Dysfunction: A Single Center Experience

2023

Coronary microvascular dysfunction (CMD) represents a widespread condition and a prevalent cause of ischemic heart disease. Total TIMI frame count (TTFC) can be a good indicator of CMD in different populations. The aim of our study was to evaluate the incidence of CMD in different populations such as METS patients compared with diabetic and hypertensive patients. The study was carried out on patients with chest pain and/or positive stress test and angiographically undamaged coronary arteries. Our CMD population was divided into three subgroups; patients with arterial hypertension, patients with type II diabetes mellitus and patients with metabolic syndrome. TIMI Frame Count (TFC) and Myocar…

Coronary microvascular disfunctionTIMI frame CountHypertensiveMyocardial blush grade.Metabolic syndrome
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Impact des allocations en ressources sur l'efficacité des écoles primaires en Côte d'Ivoire

2011

The quality of primary education in Côte d'Ivoire has deteriorated sharply over the past three decades. This situation is the result of an approximate management of the education system, which is characterized by a lack of educational support, a misallocation of resources, a congestion of classrooms (42 students for a teacher in primary school) and a lack of skilled and well trained teachers. In addition, the military-political conflict in September 2002 did not allow to improve this situation; on the contrary, it has further deteriorated the situation. Thus, the aim of this thesis is first to analyze the influence of resource endowments on the effectiveness of primary schools in Cote d'Ivo…

Côte d'IvoireConflictEducation Pour Tous[SHS.EDU]Humanities and Social Sciences/EducationAccess to primary education[SHS.EDU] Humanities and Social Sciences/EducationMéthode de l’enveloppe des donnéesDotation en ressourcesEfficiencyEstimation of Double and Triple DifferencesConflitAfriqueBorder efficiencyModèle Tobit[ SHS.ECO ] Humanities and Social Sciences/Economies and finances[SHS.ECO] Humanities and Social Sciences/Economics and FinanceEstimation par les doubles et triples différencesEfficacitéCôte d’IvoireAchèvement d’un grade de l’enseignement primaireFrontière d’efficience[ SHS.EDU ] Humanities and Social Sciences/Education[SHS.ECO]Humanities and Social Sciences/Economics and FinanceResourcingCompletion of a degree in primary educationData Envelopment AnalysisAfricaAccès à l’enseignement primaireEducation for AllTobit model
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Circolazione e sviluppo di un modello metodologico. La critica testuale delle fonti giuridiche romane fra Otto Gradenwitz e Salvatore Riccobono

2018

La ricerca delle interpolazioni, cominciata con la Scula culta, viene ripresa in Germania alla fine del XIX secolo. Fra quanti misero a punto un metodo storico-critico per lo studio delle fonti giuridiche romane va menzionato anche Gradenwitz, che – insieme ad altri studiosi tedeschi – sarebbe stato uno dei maestri di Riccobono. La prima produzione scientifica di Riccobono, che si riconosce nel nuovo indirizzo storico-critico affermatosi in Germania, si avvale dei metodi appresi dai maestri tedeschi. Lungo questo solco, tuttavia, comincia l’elaborazione di un metodo più raffinato, che distingue fra interpolazioni formali e interpolazioni sostanziali e recupera gradualmente altri strumenti d…

Die Suche nach Interpolationen begonnen im Humanismus wird in Deutschland im späten 19. Jh. wieder aufgenommen. Unter denen die eine historisch-kritische Methode für das Studium der römischen Quellen erarbeiten ist auch Gradenwitz zu nennen der – mit anderen deutschen Gelehrten – einer der Lehrer Riccobonos werden sollte. Die frühen Arbeiten Riccobonos der sich in der neuen Deutschland beherrschenden historisch-kritischen Richtung wiederfand bediente sich der bei den deutschen Lehrern erworbenen Methoden. In dieser Linie beginnt freilich die Erarbeitung einer differenzierteren Methode die zwischen formalen und sachlichen Interpolationen unterscheidet und Schritt für Schritt weitere Instrumente nutzbar macht. Mit dem Ausbruch des Ersten Weltkriegs ist eine Wendung zu noch größerer Selbständigkeit gegenüber den methodischen Modellen aus Deutschland zu beobachten in der mit der Zeit auch nationalistisch geprägte Momente Gewicht erlangt zu haben scheinen. Eine Untersuchung der späteren Arbeiten Riccobonos zeigt wie die neue Methode sich perfekt zu seinen politischen Aktivitäten fügt. In dieser Linie vertritt Riccobono eine ununterbrochene Entwicklung des römischen Rechts von der Republik bis zu den modernen Gesetzbüchern. Als der Faschismus sich die nationalistischen Anliegen zu eigen macht und Riccobono sich ohne Zögern an Aktivitäten des Regimes beteiligt stehen seine methodologischen Positionen bereits in Verbindung mit der Herausstellung eines kaiserlichen Rom das – über italienische Glossatoren und Kommentatoren – der Moderne ein substantiell nicht von außerrömischen Elementen getrübtes juristisches Erbe hinterlassen hat.Settore IUS/18 - Diritto Romano E Diritti Dell'Antichita'
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Graded polynomial identities and codimensions: Computing the exponential growth

2010

Abstract Let G be a finite abelian group and A a G-graded algebra over a field of characteristic zero. This paper is devoted to a quantitative study of the graded polynomial identities satisfied by A. We study the asymptotic behavior of c n G ( A ) , n = 1 , 2 , … , the sequence of graded codimensions of A and we prove that if A satisfies an ordinary polynomial identity, lim n → ∞ c n G ( A ) n exists and is an integer. We give an explicit way of computing such integer by proving that it equals the dimension of a suitable finite dimension semisimple G × Z 2 -graded algebra related to A.

Discrete mathematicsHilbert series and Hilbert polynomialPolynomialMathematics(all)Mathematics::Commutative AlgebraGeneral MathematicsGraded ringZero (complex analysis)GrowthPolynomial identityGraded algebraCodimensionssymbols.namesakepolynomial identity growthIntegerDifferential graded algebrasymbolsAbelian groupAlgebra over a fieldMathematicsAdvances in Mathematics
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Graded algebras with polynomial growth of their codimensions

2015

Abstract Let A be an algebra over a field of characteristic 0 and assume A is graded by a finite group G . We study combinatorial and asymptotic properties of the G -graded polynomial identities of A provided A is of polynomial growth of the sequence of its graded codimensions. Roughly speaking this means that the ideal of graded identities is “very large”. We relate the polynomial growth of the codimensions to the module structure of the multilinear elements in the relatively free G -graded algebra in the variety generated by A . We describe the irreducible modules that can appear in the decomposition, we show that their multiplicities are eventually constant depending on the shape obtaine…

Discrete mathematicsHilbert series and Hilbert polynomialPure mathematicsPolynomialMultilinear mapAlgebra and Number TheoryMathematics::Commutative AlgebraGraded ringGraded codimensionsymbols.namesakeSettore MAT/02 - AlgebraPI exponentDifferential graded algebrasymbolsMultipartitionGraded identitieVariety (universal algebra)Algebra over a fieldCodimension growthMathematics
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Ordinary and graded cocharacter of the Jordan algebra of 2x2 upper triangular matrices

2014

Abstract Let F be a field of characteristic zero and U J 2 ( F ) be the Jordan algebra of 2 × 2 upper triangular matrices over F . In this paper we give a complete description of the space of multilinear graded and ordinary identities in the language of Young diagrams through the representation theory of a Young subgroup of S n . For every Z 2 -grading of U J 2 ( F ) we compute the multiplicities in the graded cocharacter sequence and furthermore we compute the ordinary cocharacter.

Discrete mathematicsNumerical AnalysisSequenceMultilinear mapPure mathematicsAlgebra and Number TheoryJordan algebraZero (complex analysis)Triangular matrixField (mathematics)Space (mathematics)Representation theoryJordan algebras Polynomial identities Basis of identities Cocharacter Gradings Graded polynomial identitiesSettore MAT/02 - AlgebraDiscrete Mathematics and CombinatoricsGeometry and TopologyMathematics
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Polynomial identities on superalgebras: Classifying linear growth

2006

Abstract We classify, up to PI-equivalence, the superalgebras over a field of characteristic zero whose sequence of codimensions is linearly bounded. As a consequence we determine the linear functions describing the graded codimensions of a superalgebra.

Discrete mathematicsPolynomialPure mathematicsSequenceAlgebra and Number TheoryMathematics::Commutative AlgebraMathematics::Rings and AlgebrasZero (complex analysis)Field (mathematics)graded polynomial identity T_2-ideal graded codimensionsSuperalgebraSettore MAT/02 - AlgebraMathematics::Quantum AlgebraBounded functionMathematics::Representation TheoryLinear growthMathematicsJournal of Pure and Applied Algebra
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Identities of PI-Algebras Graded by a Finite Abelian Group

2011

We consider associative PI-algebras over an algebraically closed field of zero characteristic graded by a finite abelian group G. It is proved that in this case the ideal of graded identities of a G-graded finitely generated PI-algebra coincides with the ideal of graded identities of some finite dimensional G-graded algebra. This implies that the ideal of G-graded identities of any (not necessary finitely generated) G-graded PI-algebra coincides with the ideal of G-graded identities of the Grassmann envelope of a finite dimensional (G × ℤ2)-graded algebra, and is finitely generated as GT-ideal. Similar results take place for ideals of identities with automorphisms.

Discrete mathematicsPure mathematicsAlgebra and Number TheoryMathematics::Commutative AlgebraMathematics::Rings and AlgebrasGraded ringElementary abelian groupGraded Lie algebraFiltered algebraDifferential graded algebraIdeal (ring theory)Abelian groupAlgebraically closed fieldMathematicsCommunications in Algebra
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