1,487 research outputs found

    Singular random matrix decompositions: distributions.

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    Assuming that Y has a singular matrix variate elliptically contoured distribution with respect to the Hausdorff measure, the distributions of several matrices associated to QR, modified QR, SV and Polar decompositions of matrix Y are determined, for central and non-central, non-singular and singular cases, as well as their relationship to the Wishart and Pseudo-Wishart generalized singular and non-singular distributions. We present a particular example for the Karhunen-Lòeve decomposition. Some of these results are also applied to two particular subfamilies of elliptical distributions, the singular matrix variate normal distribution and the singular matrix variate symmetric Pearson type VII distribution

    Singular random matrix decompositions: Jacobians.

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    For a singular random matrix Y, we find the Jacobians associated with the following decompositions; QR, Polar, Singular Value (SVD), L'U, L'DM and modified QR (QDR). Similarly, we find the Jacobinas of the following decompositions: Spectral, Cholesky's, L'DL and symmetric non-negative definite square root, of the cross-product matrix S = Y'Y

    SINGULAR RANDOM MATRIX DECOMPOSITIONS: DISTRIBUTIONS.

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    Assuming that Y has a singular matrix variate elliptically contoured distribution with respect to the Hausdorff measure, the distributions of several matrices associated to QR, modified QR, SV and Polar decompositions of matrix Y are determined, for central and non-central, non-singular and singular cases, as well as their relationship to the Wishart and Pseudo-Wishart generalized singular and non-singular distributions. We present a particular example for the Karhunen-Lòeve decomposition. Some of these results are also applied to two particular subfamilies of elliptical distributions, the singular matrix variate normal distribution and the singular matrix variate symmetric Pearson type VII distribution.

    SINGULAR RANDOM MATRIX DECOMPOSITIONS: JACOBIANS.

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    For a singular random matrix Y, we find the Jacobians associated with the following decompositions; QR, Polar, Singular Value (SVD), L´U, L´DM and modified QR (QDR). Similarly, we find the Jacobinas of the following decompositions: Spectral, Cholesky´s, L´DL and symmetric non-negative definite square root, of the cross-product matrix S = Y´Y.

    Estancia acadĂŠmica en Lyon, Francia

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    Fil: GarcĂ­a Crimi, Graciela Edith. Universidad Nacional de Cuyo. Facultad de OdontologĂ­

    Dental fluorosis : conservative alternative for its treatment : clinical case

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    La fluorosis dental es una alteraciĂłn irreversible de la estructura dentaria caracterizada por zonas de hipomineralizaciĂłn, resultado de la ingesta excesiva de flĂşor durante la odontogĂŠnesis. En el Departamento de Lavalle, Provincia de Mendoza (Argentina) la concentraciĂłn de flĂşor es superior a la que deberĂ­a tener el agua potable de uso domiciliario. Existen diversos mĂŠtodos para clasificar la severidad de la fluorosis dental. Actualmente se puede elegir entre diversas tĂŠcnicas clĂ­nicas, sin embargo, la correcta selecciĂłn del tratamiento depende principalmente de una adecuada valoraciĂłn de la severidad de la patologĂ­a. Se describe un caso clĂ­nico de un paciente con antecedentes de fluorosis severa y como alternativa de tratamiento se optĂł por una tĂŠcnica de restauraciĂłn directa con resinas compuestas.Dental fluorosis is an irreversible alternation of the tooth structure, characterized by areas with hypomineralization, as a result of the excessive intake of fluoride during the odontogeny. In the department of Lavalle, Mendoza (Argentina), fluoride concentration in domestic water is higher than it should. There are several methods for classifying the severity of dental fluorosis. Actually, different clinical techniques can be chosen; however, the correct choice of the treatment depends mainly on the suitable assessment of the severity of the pathology. For a clinical case about a patient with severe fluorosis background, it was chosen, as an alternative of the treatment, a technique of direct restauration with composite resinFil: GarcĂ­a Crimi, Graciela Edith. Universidad Nacional de Cuyo. Facultad de OdontologĂ­

    Social commitment of the Faculty of Dentistry. Uncuyo. Mendoza. Argentina

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    Fil: GarcĂ­a Crimi, Graciela Edith. Universidad Nacional de Cuyo. Facultad de OdontologĂ­

    Get beauty function in the back sector with composite resins : case report

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    La operatoria dental actual cuenta con un conocimiento mĂĄs profundo de las diferentes estructuras dentarias que sumado al gran adelanto tecnolĂłgico y cientĂ­fico en la ciencia de los biomateriales; fruto de innumerables investigaciones, nos permiten contar hoy, con una nueva generaciĂłn de materiales restauradores, lo que hace mĂĄs crĂ­tico y exigente el conocimiento y anĂĄlisis por parte del profesional, de las tĂŠcnicas a efectuar, la realizaciĂłn depurada de procedimientos y los biomateriales a utilizar, con el fin de realizar tratamientos que sean biocompatibles, eficientes y de importante longevidad.The operative dentistry current account with a more in-depth knowledge of the different dental structures that joined the great technological advancement and scientific in the science of the biomaterials; fruit of countless research, provide us today with a new generation of restorative materials, which makes it more critical and demanding knowledge and analysis on the part of the professional and the techniques to carry out, the realization of purified procedures and biomaterials to use, in order to perform treatments that are biocompatible, efficient and important longevity.Fil: GarcĂ­a Crimi, Graciela Edith. Universidad Nacional de Cuyo. Facultad de OdontologĂ­

    RelaciĂłn entre perĂ­metro y ĂĄrea: el caso de Patricia y las interacciones

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    Presentamos un estudio de caso de una niĂąa de 5Âş de EducaciĂłn Primaria en el que se aborda la relaciĂłn entre ĂĄrea y perĂ­metro partiendo de una unidad didĂĄctica basada en la resoluciĂłn de problemas, cuyo objetivo es construir el concepto de ĂĄrea. El anĂĄlisis de cuestionarios, observaciĂłn de aula, protocolos e interacciones nos permiten reflejar aspectos cognitivos y sociolĂłgicos inherentes al proceso de construcciĂłn mencionado
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