177,669 research outputs found
Embarazos ectópicos y hematoceles pelvianos : Tesis presentada para optar al grado de doctor en medicina
No full textFil: Cirio, Carlos R. Universidad de Buenos Aires. Facultad de Medicina. Buenos Aires, Argentina.A la cabeza de portada: Universidad Nacional de Buenos Aires. Facultad de Ciencias Médicas. - Incluye nómina de Catedráticos y Asignaturas. Tesis con dedicatoria
Algebraic deformations of toric varieties I. General constructions
No full textWe construct and study noncommutative deformations of toric varieties by combining techniques from toric geometry, isospectral deformations, and noncommutative geometry in braided monoidal categories. Our approach utilizes the same fan structure of the variety but deforms the underlying embedded algebraic torus. We develop a sheaf theory using techniques from noncommutative algebraic geometry. The cases of projective varieties are studied in detail, and several explicit examples are worked out, including new noncommutative deformations of Grassmann and flag varieties. Our constructions set up the basic ingredients for thorough study of instantons on noncommutative toric varieties, which will be the subject of the sequel to this paper
Design of a 64 channels current-to-frequency converter ASIC, front-end electronics for high intensity particle beam detectors
No full textConoscenza e conservazione di un’opera del moderno: il restauro dell’ex fabbrica Cirio a Napoli
No full textIl contributo affronta lo studio dello ex stabilimento Cirio al forte di Vigliena, nell’area orientale del porto di Napoli, realizzato negli anni vento del Novecento dall’architetto Angelo Trevisan, precisandone inediti aspetti conoscitivi e puntualizzando l’attenzione sulle attuali problematiche di conservazione della fabbrica architettonica in cemento armato
Conoscenza e conservazione di un’opera del moderno: il restauro dell’ex fabbrica Cirio a Napoli
No full textIl contributo affronta lo studio dello ex stabilimento Cirio al forte di Vigliena, nell’area orientale del porto di Napoli, realizzato negli anni vento del Novecento dall’architetto Angelo Trevisan, precisandone inediti aspetti conoscitivi e puntualizzando l’attenzione sulle attuali problematiche di conservazione della fabbrica architettonica in cemento armato
Algebraic deformations of toric varieties II. Noncommutative instantons
No full textWe continue our study of the noncommutative algebraic and differential geometry of a particular class of deformations of toric varieties, focusing on aspects pertinent to the construction and enumeration of noncommutative instantons on these varieties. We develop a noncommu- tative version of twistor theory, which introduces a new example of a non- commutative four-sphere. We develop a braided version of the ADHM construction and show that it parameterizes a certain moduli space of framed torsion free sheaves on a noncommutative projective plane. We use these constructions to explicitly build instanton gauge bundles with canonical connections on the noncommutative four-sphere that satisfy appropriate anti-selfduality equations. We construct projective moduli spaces for the torsion free sheaves and demonstrate that they are smooth. We define equivariant partition functions of these moduli spaces, finding that they coincide with the usual instanton partition functions for super- symmetric gauge theories on C
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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