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Search Results: 1 - 10 of 344692 matches for " J.; Martínez González "
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EL MODELO DE INVESTIGACIóN EN BIOéTICA
Oscar J Martínez González
Acta Bioethica , 2007,
Abstract:
La educación del poder a través del teatro: El hijo del águila, de Luis Vélez de Guevara
Javier J. González Martínez
Impossibilia : Revista Internacional de Estudios Literarios , 2012,
Abstract: Theater and literature share aesthetic, educational and entertaining purposes. Sometimesthe balance is tilted towards one of them. Through Luis Vélez de Guevara’s El hijo del águila, we discussthe pedagogical function of theater in the political education of the Spanish young King Philip IV. Theconclusion is that the favorite Count-Duke of Olivares wants John of Austria to become the model forthe two conflicts facing Philip IV at the beginning of his reign: the pacification of the Netherlands andthe hostility with England.
Influencia de la longitud del recipiente y la ubicación de las sillas en los esfuerzos circunferenciales de recipientes horizontales usando el método de elementos de contorno
GONZáLEZ D,MARCO; MARTíNEZ,MANUEL J;
Revista de la Facultad de Ingeniería Universidad Central de Venezuela , 2006,
Abstract: in this article, a stress analysis based on the 3-d boundary element method to determine the influence of the parameters:vessel length and saddles location, on the values of circumferential stress at horn of the saddles in horizontal pressure vessels on two saddles, is presented. the ntegral equation obtained for this problem includes the volume integral of the body forces, represented by self-weight of vessel. the domain integral is transformed into boundary integral using the method recommended by beer. in this work, three different saddle locations (a/r1 ratio) and five different tangent-totangent lengths of vessel are used. the numerical results obtained are compared to zick analysis, most popular method to design horizontal vessels, obtaining agreed results.
Mediadores alérgicos en lágrimas de ni os con conjuntivitis alérgica estacional y perenne Allergic mediators in tear from children with seasonal and perennial allergic conjunctivitis
R. Martínez,A. Acera,J. Soria,N. González
Archivos de la Sociedad Espa?ola de Oftalmología , 2011,
Abstract: Objetivo: Evaluar la concentración de diferentes moléculas mediadoras de alergia en lágrima de ni os con conjuntivitis alérgica estacional (CAE) y conjuntivitis alérgica perenne (CAP) frente a controles. Métodos: Se incluyeron 20 ni os con conjuntivitis alérgica (17 CAE y 3 CAP), y 16 ni os sanos utilizados como controles. Las muestras de lágrima se obtuvieron mediante una hemosteta de acetato de polivinilo (OASIS, 0525) colocándola en el canto externo. Se eluyó la lágrima de la hemosteta utilizando un tampón y centrifugación a 20.000 rpm durante 30 minutos a 4oC. Una vez cuantificadas las muestras se determinaron las concentraciones de histamina (HIS), triptasa (TPS), factor quimiotáctico del eosinófilo (ECF), proteína básica (MBP), proteína catiónica del eosinófilo (ECP), neurotoxina (EDN), IgE y E-selectina mediante la técnica ELISA (enzyme-linked immunosorbent assay). Los resultados se compararon con el test no paramétrico U de Mann-Whitney (p<0,05) y se realizaron análisis multivariantes mediante regresión logística. Resultados: Presentaron diferencias estadísticamente significativas la TPS (p=0.014), MBP (p=0,032), ECP (p=0,0041), IgE (p=0,014) y EDN (p=0,00077), cuando se comparó la lágrima de ni os con CAE y CAP frente a la de ni os control. Conclusiones: El análisis simultáneo de mediadores alérgicos en la lágrima de ni os con CAE y CAP indica que existe una alteración en la lágrima referida principalmente a un aumento significativo de la concentración de EDN, ECP, MBP, y disminución de IgE y TPS. Los análisis estadísticos revelan una exactitud diagnóstica del 94,4% usando el panel de las 8 moléculas analizadas. Purpose: To evaluate the concentration of allergic mediators in tears of children with seasonal allergic conjunctivitis (SAC) and perennial allergic conjunctivitis (PAC) compared with controls. Methods: Twenty children with allergic conjunctivitis (17 SAC, and 3 PAC) and sixteen healthy children were included in this study. Tear samples were collected using a Merocel sponge (Oasis, 0525), and immediately eluted by incubation in elution buffer and subsequent centrifugation at 20,000 rpm for 30 min at 4oC. Concentrations of histamine (HIS), tryptase (TPS), eosinophil chemotactic factor (ECF), major basic protein (MBP), eosinophil cationic protein (ECP), eosinophil-derived neurotoxin (EDN), IgE and E-selectin were measured using enzyme linked immunosorbent assays (ELISA). Data were compared with the Mann-Whitney U test (P<.05), and multivariate analyses were also performed. Results: Tear levels of TPS (P=.014), MBP (P=.032), ECP (P=.0041),
Hierarchical analysis of the quiet Sun magnetism
A. Asensio Ramos,M. J. Martínez González
Physics , 2014, DOI: 10.1051/0004-6361/201423860
Abstract: Standard statistical analysis of the magnetic properties of the quiet Sun rely on simple histograms of quantities inferred from maximum-likelihood estimations. Because of the inherent degeneracies, either intrinsic or induced by the noise, this approach is not optimal and can lead to highly biased results. We carry out a meta-analysis of the magnetism of the quiet Sun from Hinode observations using a hierarchical probabilistic method. This model allows us to infer the statistical properties of the magnetic field vector over the observed field-of-view consistently taking into account the uncertainties in each pixel due to noise and degeneracies. Our results point out that the magnetic fields are very weak, below 275 G with 95% credibility, with a slight preference for horizontal fields, although the distribution is not far from a quasi-isotropic distribution.
Analytical calculation of Stokes profiles of rotating stellar magnetic dipole
M. J. Martínez González,A. Asensio Ramos
Physics , 2012, DOI: 10.1088/0004-637X/755/2/96
Abstract: The observation of the polarization emerging from a rotating star at different phases opens up the possibility to map the magnetic field in the stellar surface thanks to the well-known Zeeman Doppler Imaging. When the magnetic field is sufficiently weak, the circular and linear polarization profiles locally in each point of the star are proportional to the first and second derivatives of the unperturbed intensity profile, respectively. We show that the weak-field approximation (for weak lines in the case of linear polarization) can be generalized to the case of a rotating star including the Doppler effect and taking into account the integration on the stellar surface. The Stokes profiles are written as a linear combination of wavelength-dependent terms expressed as series expansions in terms of Hermite polynomials. These terms contain the surface integrated magnetic field and velocity components. The direct numerical evaluation of these quantities is limited to rotation velocities not larger than 8 times the Doppler width of the local absorption profiles. Additionally, we demonstrate that, in a rotating star, the circular polarization flux depends on the derivative of the intensity flux with respect to the wavelength and also on the profile itself. Likewise, the linear polarization depends on the profile and on its first and second derivative with respect to the wavelength. We particularize the general expressions to a rotating dipole.
Hanle effect for stellar dipoles and quadrupoles
R. Manso Sainz,M. J. Martínez González
Physics , 2012, DOI: 10.1088/0004-637X/760/1/7
Abstract: We derive exact expressions for the degree of lineal polarization over a resolved or integrated stellar disc due to resonance scattering and the Hanle effect from a dipolar or quadrupolar distribution of magnetic fields. We apply the theory of scattering polarization within the formalism of the spherical tensors representation for the density matrix and radiation field. The distribution of linear polarization over the stellar disk for different configurations of the magnetic field is studied and its topology discussed. For an unresolved dipole, the resulting polarization can be expressed in terms of just three functions (of the inclination angle and effective dipole strength), that are calculated numerically and their behaviour discussed. Dipolar and (aligned) quadrupoles are considered in some detail, but the techniques here ---in particular, the extensive use of the spherical tensor formalism for polarization---, can easily be applied to more general field configurations.
Pioderma gangrenoso superficial como complicación de mamoplastia
González de Vicente,R.; Amorrortu,J.; Gallo,S.; Folch,J.; González Martínez,R.;
Cirugía Plástica Ibero-Latinoamericana , 2011, DOI: 10.4321/S0376-78922011000100006
Abstract: pyoderma gangrenosum (pg) is a rare disease whose etiology is unknown, suspecting that could be due to autoimmune disorders. we present 2 cases of granulomatous pg in mediate postoperatory (3-6 weeks) in patients undergoing mammoplasty (mastopexy with prosthesis). both cases were solved by treatment with corticosteroids.
Doctor, quiero una talla 100
Amorrortu,J.; González de Vicente,R.; Gallo,S.; Folch,J.; González Martínez,R.;
Cirugía Plástica Ibero-Latinoamericana , 2009, DOI: 10.4321/S0376-78922009000300001
Abstract: when a patient consults a plastic surgeon for breast augmentation with mammary implants, most of the times, is difficult to know exactly what breast volume does she want. the method to value patient's breast volume and the one she would like to have is limited by technical problems and by the low accuracy in the psyco-social interpretation of measurements and calculation that can be done. the aim of this study was to find a way to relate patient's breast volume, the bra that she uses and the bra that she wants to use, with the volume of the breast implant needed to get the desired cup bra. we collected anthropomorphic thoracic and breast measures in 100 women between 18 and 32 years old candidates to a prosthetic breast augmentation and made an evaluation about the size of the bra they were wearing and the bra that they would like to use after surgery procedure. we studied the volume of the cup of the bras related to the calibration system of usual commercial measures. patients were asked for two questions: ?what volume of cup and contour bra does she use? and ?what volume of cup and contour bra does she want to use?, and the responses were related to the previous measurements. we looked for that breast implant that, complementing the volume of the breast cup, could fill the cup of the desired bras. knowing the commercial sizes of the bras, the bra size that the patients uses, which bra she would like to use, and knowing the measures of chest contour, breast contour (or thoracomammary contour), projection, diameter and mammary contour we can select the most adequate breast implant in every patient in order to get satisfactory results.
"Doctor, tengo un bulto en la axila". Adenomegalia siliconomatosa postmamoplastia de aumento: a propósito de ocho casos
Amorrortu,J.; González de Vicente,R.; Gallo,S.; Folch,J.; González Martínez,R.;
Cirugía Plástica Ibero-Latinoamericana , 2010, DOI: 10.4321/S0376-78922010000200004
Abstract: axillary lymphadenopathy associated with augmentation mammoplasty with silicone implants is a rare occurrence, not exceptional, and very worrying for patient and surgeon. we reviewed 1697 medical records of patients undergoing augmentation mammoplasty with silicone implants in order to study the relationship between implant rupture and axillary lymphadenopathy the 1697 patients were divided into groups having 1, 2, 3, 5 and 7 years after surgery. we reviewed the medical records and studied those who consulted for suspected implant rupture and axillary lymph nodes there were no implant rupture before 5 years after surgery. the percentage of rupture was 1.2% at 5 years and 2.3% at 7 years. silicon lymphadenopathy occurred in 55% of the ruptures detected at 5 years and 61.6% of the ruptures detected at 7 years. several studies have shown that breast implants will biodegrade over time leading in a more or less long time to rupture. in some cases rupture of the mammary implant filled with silicone gel, leads to the appearance of axillary lymphadenopathy. sometimes the primary symptom of rupture, specially when they are filled with high cohesiveness gel, is the appearance of lymphadenopathy. surgeons should think about keeping patients under periodic reviews and in an implants exchange program.
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