Sensitivity Analysis Of The Dimensionless Parameters In Scaling A Polymer Flooding Reservoir

A set of scaling criteria of a polymer flooding reservoir is derived from the governing equations, which involve gravity and capillary force, compressibility of water, oil, and rock, non-Newtonian behavior of the polymer solution, absorption, dispersion, and diffusion, etc. A numerical approach to quantify the dominance degree of each dimensionless parameter is proposed. With this approach, the sensitivity factor of each dimensionless parameter is evaluated. The results show that in polymer flooding, the order of the sensitivity factor ranges from 10(-5) to 10(0) and the dominant dimensionless parameters are generally the ratio of the oil permeability under the condition of the irreducible water saturation to water permeability under the condition of residual oil saturation, density, and viscosity ratios between water and oil, the reduced initial oleic phase saturation and the shear rate exponent of the polymer solution. It is also revealed that the dominant dimensionless parameters may be different from case to case. The effect of some physical variables, such as oil viscosity, injection rate, and permeability, on the dominance degree of the dimensionless parameters is analyzed and the dominant ones are determined for different cases.

Numerical Study Of Pile-Up In Bulk Metallic Glass During Spherical Indentation

Pile-up around indenter is usually observed during instrumented indentation tests on bulk metallic glass. Neglecting the pile-up effect may lead to errors in evaluating hardness, Young's modulus, stress-strain response, etc. Finite element analysis was employed to implement numerical simulation of spherical indentation tests on bulk metallic glass. A new model was proposed to describe the pile-up effect. By using this new model, the contact radius and hardness of Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass were obtained under several different indenter loads with pile-up, and the results agree well with the data generated by numerical simulation.

Carta Apostólica : por la que Santa Hildegarda de Bingen, Monja Profesora de la Orden de San Benito, es proclamada Doctora de la Iglesia universal

“Luz de su pueblo y de su tiempo”: con estas palabras el beato Juan Pablo II, nuestro venerado predecesor, definió a santa Hildegarda de Bingen en 1979, en ocasión del octavo centenario de la muerte de la mística alemana. Y en verdad, sobre el horizonte de la historia esta mujer se destaca con límpida claridad, por la santidad de su vida y la originalidad de su doctrina. Como sucede en toda auténtica experiencia humana y teologal, su autoridad sobrepasa decididamente los límites de una época y de una sociedad y, a pesar de la distancia cronológica y cultural, su pensamiento se manifiesta con perenne actualidad...

Notas sobre un jurista olvidado : Julio Herrera y su intervención parlamentaria con motivo de la reforma del código penal en la República Argentina (1902-1903)

Resumen: Este trabajo pretende contribuir a una producción historiográfica en desarrollo en los últimos años cuyo objetivo es el estudio de los discursos y prácticas de un conjunto de juristas argentinos adherentes al positivismo penal que desde fines del siglo XIX impulsaron una serie de iniciativas de reforma penal y penitenciaria (creación y dirección de instituciones carcelarias y post penitenciarias; renovación de la producción científica y universitaria; elaboración de propuestas legislativas; etc.). En esta ocasión, analizaremos la figura de Julio Herrera, uno de los más distinguidos penalistas argentinos, aunque paradójicamente ignorado por los estudios históricos e histórico-jurídicos, centrándonos en su intervención parlamentaria con motivo del proyecto de reforma del código penal presentado en la Cámara de Senadores en 1903.

La contribución del matrimonio al bien común : perspectivas y desafíos

Resumen: Este artículo se propone estudiar la vinculación entre matrimonio y bien común, a partir del debate en la Argentina de la ley 26.618 de legalización de las uniones homosexuales como matrimonio y de los lineamientos propuestos por Benedicto XVI en Caritas in Veritate. Se advierte una claudicación en la búsqueda del bien común que obedece a diferentes factores, sobre todo el relativismo cultural. Se propone una noción de bien común que respeta la dignidad de la persona y su dimensión social y se consideran las contribuciones del matrimonio al bien común. Se advierte cómo la ley 26.618 concede a las uniones de personas del mismo sexo beneficios propios del matrimonio entre varón y mujer sin que se cumplan las funciones sociales de esa institución. También se proponen algunas condiciones de la vida social que favorecen al matrimonio para que así contribuya al bien común, con especial referencia al ámbito de la legislación, las políticas públicas, los medios de comunicación, la empresa y el mundo del trabajo y la ciencia y la tecnología. Finalmente, se consideran los obstáculos que surgieron en el reciente debate legislativo por la aparición de un laicismo militante y la contribución de las religiones al bien común desde una sana laicidad en esta materia.

Nonlinear dynamics of atomic force microscopy with intermittent contact

When the atomic force microscopy (AFM) in tapping mode is in intermittent contact with a soft substrate, the contact time can be a significant portion of a cycle, resulting in invalidity of the impact oscillator model, where the contact time is assumed to be infinitely small. Furthermore, we demonstrate that the AFM intermittent contact with soft substrate can induce the motion of higher modes in the AFM dynamic response. Traditional ways of modeling AFM (one degree of freedom (DOF) system or single mode analysis) are shown to have serious mistakes when applied to this kind of problem. A more reasonable displacement criterion on contact is proposed, where the contact time is a function of the mechanical properties of AFM and substrate, driving frequencies/amplitude, initial conditions, etc. Multi-modal analysis is presented and mode coupling is also shown. (c) 2006 Published by Elsevier Ltd.

Validation of component assembly model and extension to plasticity

Material potential energy is well approximated by '' pair-functional '' potentials. During calculating potential energy, the orientational and volumetric components have been derived from pair potentials and embedding energy, respectively. Slip results in plastic deformation, and slip component has been proposed accordingly. Material is treated as a component assembly, and its elastic, plastic and damage properties are reflected by different components respectively. Material constitutive relations are formed by means of assembling these three kinds of components. Anisotropy has been incorporated intrinsically via the concept of component. Theoretical and numerical results indicate that this method has the capacity of reproducing some results satisfactorily, with the advantages of physical explicitness, etc. (c) 2007 Elsevier Ltd. All rights reserved.

A ordem do dia e o sistema de trocas : os atos de fala no debate parlamentar

Análise linguístico-discursiva dos atos de fala presentes nas manifestações dos Parlamentares, especialmente no período da sessão denominado Ordem do Dia, incluídas aí as trocas conversacionais. Apresenta como base teórica a Linguística Sistêmico-Funcional, de Halliday – especificamente o Sistema de Troca da Linguagem –, a teoria dialógica de Bakhtin e o sistema estrutural conversacional proposto por Martin e Rose.

Experimental investigation on low-temperature fatigue crack propagation in offshore structural steel A131 under random sea ice loading

An apparatus of low-temperature controlling for fatigue experiments and its crack measuring system were developed and used for offshore structural steel A131 under conditions of both low temperature and random sea ice. The experimental procedures and data processing were described, and a universal random data processing software for FCP under spectrum loading was written. Many specific features of random ice-induced FCP which differed with constant amplitude FCP behaviours were proposed and temperature effect on ice-induced FCP was pointed out with an easily neglected aspect in designing for platforms in sea ice emphasized. In the end, differences of FCP behaviours between sea ice and ocean wave were presented.