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Search Results: 1 - 10 of 565823 matches for " E. Carrasco Pi?a "
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Alimentación y diabetes Food and diabetes
S. Durán Agüero,E. Carrasco Pia,M. Araya Pérez
Nutrición Hospitalaria , 2012, DOI: 10.3305/nh.2012.27.4.5859
Abstract: Una dieta con bajo índice glicémico puede mejorar el control metabólico en la diabetes tipo 2, pero el debate aún continúa. Las frutas a pesar de la fructosa que contienen, también puede bajar el índice glicérico, además su consumo se ha asociado con una reducción de los niveles de A1c y pueden influir positivamente en el colesterol HDL, presión arterial y riesgo de enfermedad coronaria en general. Con respecto a la ingesta de grasa no se observa una relación entre ella y la A1c. Con respecto al consumo de alcohol se ha reportado que el consumo moderado de alcohol se asocia con una menor prevalencia de síndrome metabólico, aunque no hay información que lo relacione con el A1c. En este artículo se revisa la evidencia publicada sobre el efecto del consumo de frutas, grasas y alcohol sobre el control metabólico en diabéticos. A low glycemic diet may improve metabolic control in type 2 diabetes, but the debate continues. Fruits, despite the fructose they contain, may also lower the glycemic index, as well as its consumption has been associated with a reduction in A1c levels and can positively influence HDL cholesterol, blood pressure and risk of coronary heart disease in general. There is no relationship between fat intake and A1c. On the consumption of alcohol has been reported that moderate alcohol consumption is associated with a lower prevalence of metabolic syndrome, although there is information that relates to the A1c. This article reviews the published evidence on the effect of consumption of fruits, fats and alcohol on metabolic control in diabetics.
El profesor Pedro Carrasco Garrorena
Pia, E;
Revista mexicana de física E , 2008,
Abstract: this is a relation about the most important facts in the profesor pedro carrasco garrorena's academic life, head of the astronomical observatory at madrid, and dean of the faculty of sciences of the university of madrid during the civil war. he left spain next to the franco's triumph as he was pursued in exceptionally form. he arrived to mexico in 1939, when physics was borning in this country, and served to science by teaching and through the publication of his scientific books
Fuentes para la biografía del profesor de física Ladislao de la Pascua Martínez (1815-1891)
Pia, E;
Revista mexicana de física E , 2010,
Abstract: ladislao de la pascua was a teacher of physics in mexico city between 1838 and 1872 at the military academy, school of medicine, the preparatoria nacional and other schools. he wrote a text to teach physics in 1853. he had a rich life with important activities as a physician and as a priest. there is a large amount of literature on his life, however his biographies are incomplete and some with inexact legend. in this work emphasis is given to original documents and sources of the xix century completed by some few sources from the xx and xxi centuries.
New coordinates for the four-body problem
Pia, E.;
Revista mexicana de física , 2010,
Abstract: a new coordinate system is defined to study the physical four-body dynamical problem with general masses, with the origin the of coordinates at the center of mass. the transformation from the frame of inertial coordinates involves a combination of a rotation to the system of principal axis of inertia, followed by three changes of scale modifying the principal moments of inertia yield to a body with three equal moments of inertia, and finally a second rotation that leaves unaltered the equal moments of inertia. these three transformation steps yield a mass-dependent, rigid, orthocentric tetrahedron of constant volume in the baricentric inertial coordinates. each of those three linear transformations is a function of three coordinates that produce the nine degrees of freedom of the physical four-body problem, in a coordinate system with the center of mass as origin. the relation between the well-known equilateral tetrahedron solution to the gravitational four-body problem and the new coordinates is exhibited, and the planar case of central configurations with four different masses is computed numerically in these coordinates.
New coordinates for the four-body problem
E. Pia
Revista mexicana de física , 2010,
Abstract: Se define un sistema de coordenadas nuevo para el problema dinámico de cuatro cuerpos con masas diferentes, con origen de coordenadas en el centro de masa. La transformación desde el sistema de coordenadas inercial incluye una combinación de una rotación al sistema de ejes principales de inercia, seguida por tres cambios de escala que modifican los tres momentos principales de inercia para producir un cuerpo con los tres momentos principales de inercia iguales, y finalmente otra rotación que deja inalterados los momentos de inercia iguales. Estas tres transformaciones llevan un tetraedro rígido, ortocéntrico, función de las masas, con tres momentos principales de inercia iguales, de volumen constante al tetraedro que forman las coordenadas inerciales. Cada una de estas tres transformaciones lineales es una función de tres coordenadas que producen los nueve grados de libertad del Problema de Cuatro Cuerpos en este sistema de coordenadas, con el centro de masa en el origen. Se exhibe la relación entre la solución muy conocida de tetrahedro equilátero del problema gravitacional de Cuatro Cuerpos y las coordenadas nuevas, y después el caso plano de configuraciones centrales, con cuatro masas diferentes, se calculó numéricamente en estas coordenadas.
El profesor Pedro Carrasco Garrorena
E Pia
Revista mexicana de física E , 2008,
Abstract: Relación de los aspectos más importantes de la vida académica del profesor Pedro Carrasco Garrorena, Director durante la Guerra Civil del Observatorio Astronómico de Madrid y Decano de la Facultad de Ciencias de la Universidad de Madrid. Tuvo que dejar Espa a al triunfo de Francisco Franco por haber sido perseguido de forma excepcional. Llegó en 1939 al México que empezaba a nacer científicamente y sirvió a la ciencia en su plena madurez por medio de su cátedra y sus libros científicos This is a relation about the most important facts in the profesor Pedro Carrasco Garrorena's academic life, Head of the Astronomical Observatory at Madrid, and Dean of the Faculty of Sciences of the University of Madrid during the Civil War. He left Spain next to the Franco's triumph as he was pursued in exceptionally form. He arrived to Mexico in 1939, when Physics was borning in this country, and served to Science by teaching and through the publication of his scientific books
Fuentes para la biografía del profesor de física Ladislao de la Pascua Martínez (1815-1891)
E Pia
Revista mexicana de física E , 2010,
Abstract: Ladislao de la Pascua fue profesor de física en la Ciudad de México entre 1838 y 1872 en el Colegio Militar, la Escuela de Medicina, la Preparatoria Nacional y otras instituciones. Escribió un libro de física general, cuya primera edición es de 1853. Tuvo una vida muy rica, donde destaca también su labor como médico y como presbítero. Se ha escrito mucho sobre él y sin embargo muchas de sus biografías están incompletas y en algunas de ellas se han sustituido datos históricos por leyendas inexactas. En este trabajo se ha puesto algún énfasis en buscar fuentes originales de documentos de sus expedientes y fuentes contemporáneas del siglo XIX donde se le menciona. Algunas lagunas se completan con pocas fuentes de historiadores de los siglos XX y XXI. Ladislao de la Pascua was a Teacher of Physics in Mexico City between 1838 and 1872 at the Military Academy, School of Medicine, the Preparatoria Nacional and other schools. He wrote a text to teach Physics in 1853. He had a rich life with important activities as a physician and as a priest. There is a large amount of literature on his life, however his biographies are incomplete and some with inexact legend. In this work emphasis is given to original documents and sources of the XIX Century completed by some few sources from the XX and XXI Centuries.
Canonical Formalism in Special Relativity
E. Pia
Physics , 2009,
Abstract: A covariant Hamiltonian description was introduced in the dynamics of charges and electromagnetic interaction. By a canonical transformation this Hamiltonian formalism was transformed to obtain the Dirac generators for any form of relativistic dynamics, as coefficients of a first degree polynomial in the ten translation and rotation velocities of the Poincar\'e transformation. The Currie's world line conditions were generalized to any form of the dynamics. The explicit relation between the covariant field variables and the more usual 3-dimensional Fourier variables was derived.
New coordinates for the Four-Body problem
E. Pia
Physics , 2009,
Abstract: A new coordinate system is defined for the Four-Body dynamical problem with general masses, having as its origin of coordinates the center of mass. The transformation from the inertial coordinate system involves a combination of a rotation to the principal axis of inertia, followed by three changes of scale leading the principal moments of inertia to yield a body with three equal moments of inertia, and finally a second rotation that leaves unaltered the equal moments of inertia. These three transformations yield a mass-dependent rigid orthogonal tetrahedron of constant volume in the inertial coordinates. Each of those three linear transformations is a function of three coordinates that produce the nine degrees of freedom of the Four-Body problem, in a coordinate system with the center of mass as origin. The relation between the well known equilateral tetrahedron solution of the gravitational Four-Body problem and the new coordinates is exhibited, and the plane case of central configurations with four different masses is computed numerically in these coordinates.
Computing collinear 4-Body Problem central configurations with given masses
E. Pia
Physics , 2011,
Abstract: An interesting description of a collinear configuration of four particles is found in terms of two spherical coordinates. An algorithm to compute the four coordinates of particles of a collinear Four-Body central configuration is presented by using an orthocentric tetrahedron, which edge lengths are function of given masses. Each mass is placed at the corresponding vertex of the tetrahedron. The center of mass (and orthocenter) of the tetrahedron is at the origin of coordinates. The initial position of the tetrahedron is placed with two pairs of vertices each in a coordinate plan, the lines joining any pair of them parallel to a coordinate axis, the center of masses of each and the center of mass of the four on one coordinate axis. From this original position the tetrahedron is rotated by two angles around the center of mass until the direction of configuration coincides with one axis of coordinates. The four coordinates of the vertices of the tetrahedron along this direction determine the central configuration by finding the two angles corresponding to it. The twelve possible configurations predicted by Moulton's theorem are computed for a particular mass choice.
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