oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 4 )

2018 ( 13 )

2017 ( 4 )

2016 ( 9 )

Custom range...

Search Results: 1 - 10 of 6495 matches for " Jaime Klapp "
All listed articles are free for downloading (OA Articles)
Page 1 /6495
Display every page Item
Arqueoastronomía y la traza urbana en Teotihuacan
Salvador Galindo,Jaime Klapp
Ciencia Ergo Sum , 2009,
Abstract: Al examinar la orientación de trazas urbanas a lo largo de México se puede observar una alineación particular al este de la dirección norte que coincide con la alineación de la antigua ciudad de Teotihuacan. Este trabajo recoge las distintas explicaciones surgidas sobre el origen de esta característica peculiar de Teotihuacan.
Simulations of Colliding Uniform Density H2 Clouds  [PDF]
Guillermo Arreaga-García, Jaime Klapp, Julio Saucedo Morales
International Journal of Astronomy and Astrophysics (IJAA) , 2014, DOI: 10.4236/ijaa.2014.41018
Abstract: In this paper we present a set of numerical simulations designed to study the interaction process of HII molecular clouds. For the initial conditions we assume head-on and oblique collisions of binary identical clouds placedadjacent to one another, with their surfaces just in contact. The colliding initial clouds are uniform density molecular gas spheres with rigid body rotation. The cloud initial conditions are chosen to favor its gravitational collapse as an isolated system. To study the effect of the self-gravity of the cloud in the collision process, we consider several models in which the approaching speed of the colliding clouds increases from zero up to several times the initial sound speed of the barotropic gas. We present the outcome of these collision models for several values of the impact parameter b, which depends on
Collapse and fragmentation models of cloud cores with magnetic field support
Jaime Klapp,Leonardo Di G. Sigalotti
Revista mexicana de astronomía y astrofísica , 2000,
Abstract: En este trabajo presentamos modelos num ericos del colapso y fragmentaci on de n ucleos de nubes moleculares con baja rotaci on ( 0:037) y con energ a t ermica moderada ( 0:36), incluyendo los efectos de soporte magn etico, difusi on am- bipolar y una interacci on de marea debida a un encuentro gravitacional con otra protoestrella. Las fuerzas magn eticas retrasan el inicio del colapso din amico y por consiguiente de la fragmentaci on por un lapso de tiempo que depende de la raz on entre la masa y el ujo magn etico en el centro de la protoestrella. Los resultados muestran que los modelos son susceptibles a fragmentarse en sistemas binarios y en algunos casos en sistemas triples o cuadruples dependiendo de la intensidad del soporte magn etico y de la interacci on de marea.
El burro cuántico de Sancho Panza (Los Nobel en Física 2003)
Salvador Galindo Uribarri,Jaime Klapp Escribano
Ciencia Ergo Sum , 2004,
Abstract: EL premio Nobel en Física 2003 fue compartido por Leggett, Abrikosov y Ginzburg, por sus contribuciones al entendimiento de fenómenos a bajas temperaturas. Este ensayo explica, a un nivel elemental, sus teorías. Además este trabajo presenta una serie de eventos relacionados con las teorías mencionadas que forman una historia de tres animales cuánticos: un gato, un calamar y un burro.
Fluids in cosmology
Jorge L. Cervantes-Cota,Jaime Klapp
Physics , 2013, DOI: 10.1007/978-3-319-00191-3_4
Abstract: We review the role of fluids in cosmology by first introducing them in General Relativity and then by applying them to a FRW Universe's model. We describe how relativistic and non-relativistic components evolve in the background dynamics. We also introduce scalar fields to show that they are able to yield an inflationary dynamics at very early times (inflation) and late times (quintessence). Then, we proceed to study the thermodynamical properties of the fluids and, lastly, its perturbed kinematics. We make emphasis in the constrictions of parameters by recent cosmological probes.
Numerical Simulation of the Blood Flow through a Brain Vascular Aneurysm with an Artificial Stent Using the SPH Method  [PDF]
Leonardo Di G. Sigalotti, Jaime Klapp, Karla Pedroza, Edgar Nathal, Carlos E. Alvarado-Rodríguez
Engineering (ENG) , 2018, DOI: 10.4236/eng.2018.1012062
Abstract: We present numerical simulations of blood flow through a brain vascular aneurysm with an artificial stent using Smoothed Particle Hydrodynamics (SPH). The aim of this work is to analyze how the flow into an aneurysm changes using different stent configurations. The initial conditions for the simulations were constructed from angiographic images of a real patient with an aneurysm. The wall shear stresses, pressure and highest velocity within the artery, and other particular quantities are calculated which are of medical specific interest. The numerical simulations of the cerebral circulation help doctors to determine if the patient’s own vascular anatomy has the conditions to allow arterial stenting by endovascular method before the surgery or even evaluate the effect of different stent structure and materials. The results show that the flow downstream the aneurysm is highly modified by the stent configuration and that the best choice for reducing the flow in the aneurysm is to use a completely extended Endeavor stent.
Numerical simulation of 226Ra migration and decay in a saturated porous medium
DE LA CRUZ, Eduardo;GONZALEZ, Roberto;KLAPP, Jaime;LONGORIA, Luis Carlos;MAYORAL, Estela;DUARTE, Ricardo;
Revista internacional de contaminación ambiental , 2011,
Abstract: numerical simulation of transport and radioactive decay of 226ra as a constant product of 238u decay from a simulated storage facility containing uranium tailings is presented in this work. the simulation domain consists of six subsoil layers through which one of the uranium daughters 226ra is migrating as well as decaying. the methodology consists in first calculating the 226ra velocity field through the computational domain by solving the momentum and mass conservation equation using darcy′s law. the transport equation is then solved to obtain the extent of the contaminant′s migration. the solution is obtained with the finite-element method. results showed that the estimated 226ra migration time through 200 meters of soil was about five hundred years.
Numerical simulation of 226Ra migration and decay in a saturated porous medium
Eduardo DE LA CRUZ,Roberto GONZALEZ,Jaime KLAPP,Luis Carlos LONGORIA
Revista internacional de contaminación ambiental , 2011,
Abstract: En este trabajo se presenta una simulación numérica de la migración y del decaimiento de 226Ra como un producto constante del decaimiento del 238U a través del subsuelo de un almacén modelado que contiene jales de uranio. El dominio de simulación para modelar el transporte de 226Ra consiste en seis diferentes capas de tierra a través de las cuales los productos del 226Ra van migrando y decayendo. La metodología calcula el campo de velocidades por medio de la ecuación de momento y de conservación de masa usando la ley de Darcy. Posteriormente se utiliza este resultado para resolver la ecuación de transporte. La solución es obtenida con el método de elementos finitos. Los resultados muestran que el tiempo estimado de migración del 226Ra a lo largo de 200 metros de tierra fue de alrededor de 500 a os.
Numerical simulations of the Kelvin-Helmholtz instability with the Gadget-2 SPH code
Ruslan F. Gabbasov,Jaime Klapp-Escribano,Joel Suarez-Cansino,Leonardo Di G. Sigalotti
Physics , 2013,
Abstract: The method of Smoothed Particle Hydrodynamics (SPH) has been widely studied and implemented for a large variety of problems, ranging from astrophysics to fluid dynamics and elasticity problems in solids. However, the method is known to have several deficiencies and discrepancies in comparison with traditional mesh-based codes. In particular, there has been a discussion about its ability to reproduce the Kelvin-Helmholtz Instability in shearing flows. Several authors reported that they were able to reproduce correctly the instability by introducing some improvements to the algorithm. In this contribution, we compare the results of Read et al. (2010) implementation of the SPH algorithm with the original Gadget-2 N-body/SPH code.
A Newtonian approach to the cosmological dark fluids
Alejandro Aviles,Jorge L. Cervantes-Cota,Jaime Klapp,Orlando Luongo,Hernando Quevedo
Physics , 2014,
Abstract: We review the hydrodynamics of the dark sector components in Cosmology. For this purpose we use the approach of Newtonian gravitational instability, and thereafter we add corrections to arrive to a full relativistic description. In Cosmology and Astrophysics, it is usual to decompose the dark sector into two species, dark matter and dark energy. We will use instead a unified approach by describing a single unified dark fluid with very simple assumptions, namely the dark fluid is barotropic and its sound speed vanishes.
Page 1 /6495
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.