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Search Results: 1 - 10 of 200315 matches for " MARIO SEPULVEDA G "
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Enfoque clínico del trastorno de conducta en el ni o mayor
MARIO SEPULVEDA
Revista chilena de pediatría , 1960,
Abstract:
La encopresis como manifestación de trastornos psíquicos en el ni o
CARLOS ALMONTE V,EVA RONA R,MARIO PEREZ U,MARIO SEPULVEDA G
Revista chilena de pediatría , 1973,
Abstract:
Consideraciones sobre problemáticas del adolescente a través de la patología
MARIO PEREZ,MARIO SEPULVEDA,CARLOS ALMONTE
Revista chilena de pediatría , 1973,
Abstract:
A Note on Time Discretion and the Welfare Cost of Lump-Sum Taxation  [PDF]
Cristian F. Sepulveda
Theoretical Economics Letters (TEL) , 2018, DOI: 10.4236/tel.2018.82013
Abstract: The lump-sum tax is broadly regarded by standard optimal tax theory as the only non-distortionary tax instrument; any other tax instrument distorts relative prices and thus creates a deadweight loss. This paper discusses an unintended effect of lump-sum taxation that can be considered a distortion of the time endowment. Whenever this tax exceeds the amount of non-labor income, it reduces the taxpayer’s ability to freely allocate her time endowment. As long as the taxpayer assigns a positive value to time discretion, the lump-sum tax creates a welfare cost that has not been identified in the relevant literature. The welfare cost of the lump-sum tax could plausibly be greater than the traditional measure of deadweight loss of an equal yield labor income tax, which does not affect time discretion. Since the lump-sum tax does not unambiguously lead to a greater welfare level, we can conclude that it is not a proper efficiency standard at low levels of non-labor income. The same argument can be used to call for caution in the use of taxes based on the value of assets that are not the source of income flows, like owner-occupied property taxes and some types of wealth taxes. At low levels of non-labor income, these tax instruments will also have a negative effect on time discretion.
Figures of Merit for High-Performance Transparent Electrodes Using Dip-Coated Silver Nanowire Networks
Sergio B. Sepulveda-Mora,Sylvain G. Cloutier
Journal of Nanomaterials , 2012, DOI: 10.1155/2012/286104
Abstract: Homogeneous, highly conductive, and transparent silver nanowire thin films were fabricated using a simple dip-coating technique and a subsequent annealing step. Silver nanowires with two different average lengths (11 μm and 19 μm) were used in the sample preparation to analyze the dependence of the sheet resistance on the length of the one-dimensional nanostructures. The best sample had a sheet resistance of 10.2  with optical transmittance of 89.9%. Two figures of merit, the electrical to optical conductivity ratio and , were obtained for all the samples in order to measure their performance as transparent conductive materials.
H?lder's inequality: some recent and unexpected applications
N. Albuquerque,G. Araujo,D. Pellegrino,J. Seoane-Sepulveda
Mathematics , 2014,
Abstract: H\"{o}lder's inequality, since its appearance in 1888, has played a fundamental role in Mathematical Analysis and it is, without any doubt, one of the milestones in Mathematics. It may seem strange that, nowadays, it keeps resurfacing and bringing new insights to the mathematical community. In this expository article we show how a variant of H\"{o}lder's inequality (although well-known in PDEs) was essentially overlooked in Functional Analysis and has had a crucial (and in some sense unexpected) influence in very recent and major breakthroughs in Mathematics. Some of these recent advances appeared in 2012-2014 and include the theory of Dirichlet series, the famous Bohr radius problem, certain classical inequalities (such as Bohnenblust--Hille or Hardy--Littlewood), or even Mathematical Physics.
Sindroma de Mikulicz
DARIO SEPULVEDA
Revista chilena de pediatría , 1946,
Abstract:
Efecto de la Aplicación de Láser de Baja Potencia Sobre la Mucosa Oral Lesionada
Suazo Galdames,Iván Claudio; Lara Sepulveda,María Constanza; Cantín López,Mario Gonzalo; Zavando Matamala,Daniela Alejandra;
International Journal of Morphology , 2007, DOI: 10.4067/S0717-95022007000300008
Abstract: the laser use has had a constant evolution and development; the bioestimulantion effects have been verified in numerous studies that the irradiation laser of fall promotes produces on having interacted with cells and tissues this study tries to determine the morphologic differences in the oral mucous injured, after the application of low-level laser, across changes in the vascular density of the subpapilar plexus of the mucous oral. fifteen sprague dawley mice were used, which formed three groups, in the total number of animals the oral mucous was injured, in the average zone of the labial low frenum. group i was taken as a control; in group ii a low-level laser was applied on the mucous immediately the oral injury, then, at 48 after 24 hours in a dose of 6 joule/cm2 for application; group iii a low-level laser in a single dose of 18 joule/cm2 was applied immediately the oral injury. the unit of sample and analysis they were the histological cuts obtained of the section of the oral mucous injured. the results show a major vascular density in the group the ii with regard to the group i and the iii, with a density i mediate of 4,07 vassels/25mm2, while the group i of 2,47 vassels/25mm2 and group ii of 1,87 vassels/25mm2. no find differences between groups i and iii. these results indicate that the application of low-level laser in low dose originate an increase in the vascular density in the oral mucous injured
Efecto de la Aplicación de Láser de Baja Potencia Sobre la Mucosa Oral Lesionada Effect of the Low-power Laser on the Oral Mucous Injured
Iván Claudio Suazo Galdames,María Constanza Lara Sepulveda,Mario Gonzalo Cantín López,Daniela Alejandra Zavando Matamala
International Journal of Morphology , 2007,
Abstract: La utilización del láser ha tenido una constante evolución y desarrollo. Se ha comprobado en numerosos estudios los efectos bioestimulantes que la irradiación láser de baja potencia produce al interactuar con los tejidos y células. Este estudio pretende determinar la existencia de diferencias morfológicas en la mucosa oral lesionada, posterior a la irradiación con láser de baja potencia, a través de cambios en la densidad vascular del plexo subpapilar de la mucosa oral. Se utilizaron 15 ratas Sprague Dawley, las cuales se dividieron en tres grupos. A la totalidad de los animales se les lesionó la mucosa oral, en la zona media del frenillo labial inferior. El grupo I se tomó como control; al grupo II se le aplicó láser de baja potencia sobre la mucosa oral inmediatamente realizada la lesión, luego, a las 24 y 48 horas, en una dosis de 6 Joule/cm2 por aplicación; al grupo III se le aplicó láser de baja potencia en una dosis única de 18 Joule/cm2 inmediatamente efectuada la lesión. La unidad de muestra y análisis fueron los cortes histológicos obtenidos de la sección de la mucosa oral lesionada. Los resultados muestran una mayor densidad vascular en el grupo II con respecto a los grupos I y III, con una densidad promedio de 4,07 vasos sanguíneos/25mm2, mientras el grupo I de 2,47 vasos sanguíneos/25mm2 y el grupo III de 1,87 vasos sanguíneos/25mm2. No se observó diferencia entre las densidades obtenidas para los grupos I y III. Estos resultados indican que la aplicación de láser de baja potencia en dosis baja produce un aumento en la densidad vascular en la mucosa oral lesionada The laser use has had a constant evolution and development; the bioestimulantion effects have been verified in numerous studies that the irradiation laser of fall promotes produces on having interacted with cells and tissues This study tries to determine the morphologic differences in the oral mucous injured, after the application of low-level laser, across changes in the vascular density of the subpapilar plexus of the mucous oral. Fifteen Sprague Dawley mice were used, which formed three groups, in the total number of animals the oral mucous was injured, in the average zone of the labial low frenum. Group I was taken as a control; in group II a low-level laser was applied on the mucous immediately the oral injury, then, at 48 after 24 hours in a dose of 6 Joule/cm2 for application; Group III a low-level laser in a single dose of 18 Joule/cm2 was applied immediately the oral injury. The unit of sample and analysis they were the histological cuts obtained of the section of the oral
Synaptotoxicity of Alzheimer Beta Amyloid Can Be Explained by Its Membrane Perforating Property
Fernando J. Sepulveda,Jorge Parodi,Robert W. Peoples,Carlos Opazo,Luis G. Aguayo
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0011820
Abstract: The mechanisms that induce Alzheimer's disease (AD) are largely unknown thereby deterring the development of disease-modifying therapies. One working hypothesis of AD is that Aβ excess disrupts membranes causing pore formation leading to alterations in ionic homeostasis. However, it is largely unknown if this also occurs in native brain neuronal membranes. Here we show that similar to other pore forming toxins, Aβ induces perforation of neuronal membranes causing an increase in membrane conductance, intracellular calcium and ethidium bromide influx. These data reveal that the target of Aβ is not another membrane protein, but that Aβ itself is the cellular target thereby explaining the failure of current therapies to interfere with the course of AD. We propose that this novel effect of Aβ could be useful for the discovery of anti AD drugs capable of blocking these “Aβ perforates”. In addition, we demonstrate that peptides that block Aβ neurotoxicity also slow or prevent the membrane-perforating action of Aβ.
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