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Search Results: 1 - 10 of 299185 matches for " Ramon J. Moral "
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Experimental and Numerical Investigation of the Ground Shock Coupling Factor for Near-Surface Detonations
Timothy W. Shelton,John Q. Ehrgott Jr.,Ramon J. Moral,Michele Barbato
Shock and Vibration , 2014, DOI: 10.1155/2014/789202
Abstract: This paper presents the results of recent ground shock experiments conducted by the U.S. Army Engineer Research and Development Center to further investigate the adequacy of the coupling factor approach to shallow-buried or near-surface detonations. Comparisons between these recent experimental results and results of numerical simulations of the ground shock propagation in soil are presented. It was found that the coupling factor curve currently adopted in design of buried structures does not accurately represent the actual ground shock propagation in soil and that different coupling factor curves are needed for different physical quantities of interest in design. The results presented in this paper also suggest that the coupling factor curves are functions of several parameters in addition to the depth of burial and that numerical simulations can capture reasonably well the ground shock propagation of soil stresses and particle velocities. 1. Introduction The U.S. military has many important deeply buried hardened facilities that must be capable of surviving the effects of conventional weapon attacks, which can result in the detonation of buried explosives in close proximity to the buried structure. These structures are designed to withstand ground shock induced by an explosive event that could occur any distance from the structure, either aboveground or belowground, thereby providing safe harbor for personnel. To achieve a reliable design, accurate methods are needed to predict the ground shock (i.e., radial soil stresses and particle velocities) that propagates from the explosive source to the buried structure. For aboveground detonations, the ground shock induced to the buried structure is minimal, as the vast majority of the explosive energy is transmitted as airblast. As the detonation point moves towards and eventually below the ground surface, the energy transmitted into the ground, and hence the resulting ground shock, increases until a maximum ground shock is produced at a specific depth. The distance from the ground surface to the center of gravity of the detonating charge, considered as positive for below ground explosions, is called depth of burial (DOB). The maximum ground shock is produced at a DOB that is referred to as a “fully coupled” DOB. By definition, the fully coupled DOB is the depth at which burying the bomb any additional amount will not result in additional ground shock transmission. The ground shock for detonations occurring at depths at or below the fully coupled DOB (fully coupled detonations) is quite predictable and can
OIL GEOCHEMISTRY OF THE PUTUMAYO BASIM
RAMON,J.C.;
CT&F - Ciencia, Tecnología y Futuro , 1996,
Abstract: biomarker fingerprinting of 20 crude oils from putumayo basin, colombia, shows a vertical segregation of oil families. the lower cretaceous reservoirs (caballos and "u" villeta sands) contain oils that come from a mixture of marine and terrestrial organic matter, deposited in a marginal, "oxic" marine setting. the upper cretaceous ("t" and "n" sands) and tertiary reservoirs contain oils with marine algal input deposited in a reducing, carbonate-rich environment. lithology, environmental conditions and organic matter type of source rocks as predicted from oil biomarker differences correspond to organic composition of two cretaceous source rocks. vertical heterogeneity in the oils, even those from single wells, suggests the presence of two isolated petroleum systems. hydrocarbons from lower cretaceous source rocks charged lower cretaceous reservoirs whereas oils from upper cretaceous source rocks charged upper cretaceous and tertiary reservoirs. oil migration from mature source rocks into multiple reservoirs has been stratigraphically updip along the "regional" sandstone units and vertical migration through faults has been limited. biomarker maturity parameters indicate that all oils were generated from early thermal maturity oil window.
Nullification functors and the homotopy type of the classifying space for proper bundles
Ramon J. Flores
Mathematics , 2005, DOI: 10.2140/agt.2005.5.1141
Abstract: Let G be a discrete group for which the classifying space for proper G-actions is finite-dimensional. We find a space W such that for any such G, the classifying space PBG for proper G-bundles has the homotopy type of the W-nullification of BG. We use this to deduce some results concerning PBG and in some cases where there is a good model for PBG we obtain information about the BZ/p-nullification of BG.
Idoneidad del injerto corneal de donante neonato en la queratoplastia penetrante
Belmonte,J.; Moral,R.; Vallcanera,S.;
Archivos de la Sociedad Espa?ola de Oftalmología , 2008, DOI: 10.4321/S0365-66912008000400004
Abstract: objective: the lower recommended age of the donor cornea is a controversial matter. although newborn corneas have a high endothelial cell density, there are anatomical, refractive (myopic shift) and postoperative problems. two cases are analyzed; one had an atypical refractive result and the other an unexpectedly severe immune response. we also review the use of pediatric donor corneas in penetrating keratoplasty. methods: two young patients with keratoconus, in whom a penetrating keratoplasty was done using a 4-month-old newborn corneal donor with high endothelial cell density (4.500 cell/mm2) are reported. results: in the early postoperative period, both had high hypermetropy with weak astigmatism that improved over the next few months. in one patient a marked increase in the astigmatism after removal of the continuous suture was observed. one and a half years after the penetrating keratoplasty there was v=1 corrected vision and the endothelial population was almost unchanged (4,300 cell/mm2). the other patient suffered an allograft reaction with corneal oedema in the seventh postoperative month, and subsequent rupture of the continuous suture made its early removal necessary. the oedema partially diminished with high doses of steroids, but still persisted eighteen months later. conclusion: the newborn corneal graft might have led to an early strong hypermetropy as opposed to the supposed myopic shift referred to in the literature. the extremely rapid healing seen in young recipients may lead to early loosening of the continuous suture. high endothelial cell density increases the risk of irreversible graft failure probably due to a high antigenic response. the use of a newborn donor cornea is questionable due to unpredictable refractive and immunological responses.
Más Noticias Sobre la Depuración Política Universitaria de Catedráticos de Derecho en Espa?a: 1936-1943
Peláez,Manuel J; Zambrana Moral,Patricia;
Revista de estudios histórico-jurídicos , 2007, DOI: 10.4067/S0716-54552007000100016
Abstract: the objective is to provide new data about the political university purification of law professors during the period between 1936 and 1943. in particular, it refers to the cases of luis garcía de valdeavellano y arcimis, franciso gómez del campillo, eugenio cuello calón, blas pérez gonzález, gonzalo del castillo alonso, carlos sanz cid, ramón carande thovar, joseph maria caries pi sufier or jaume mans puigarnau.
Historia del derecho de minas en el Rosellón, Andorra y Catalu?a (1a parte)
Zambrana Moral,Patricia; Peláez,Manuel J.;
Revista de estudios histórico-jurídicos , 2006, DOI: 10.4067/S0716-54552006000100019
Abstract: this is a review of the historic mining legislation in rosellón, andorra and catalonia, from its remotest precedents until the dissemination of the castilian law from the xviii century in the ancient principality?s territory. the analysis focuses on the main problem: the ownership of mines and is broadened to address the ever-lasting need for franchising mining exploitation in the legislation of the south of france and in that of the territories to which this article refers.
Más noticias sobre la depuración política universitaria de catedráticos de Derecho en Espa?a (1936-1943) (2a parte)
Zambrana Moral,Patricia; Peláez,Manuel J;
Revista de estudios histórico-jurídicos , 2008, DOI: 10.4067/S0716-54552008000100019
Abstract: the aim is to continue supplying data about the university political purging of law professors in the period between 1936 and 1943, completing the first part published in this same school. until now we have analysed the concrete files; now we will talk about the rules and of some particular case of who would reach a professorship after their purging after the war.
Seminarios de 2008 de Historia del Derecho y de las Instituciones, de Derecho Romano y de Derecho Histórico Comparado en la Universitat Pompeu Fabra: Seminario permanente “Josep Maria Font Rius” 2008 seminars on History of Law and of Institutions, on Roman Law and on Historic Law Compared in the Universitat Pompeu Fabra: Permanent seminar “Josep Maria Font Rius”
Patricia Zambrana Moral,Manuel J Peláez
Revista de estudios histórico-jurídicos , 2008,
Abstract:
Historia del derecho de minas en el Rosellón, Andorra y Catalu a (1a parte)
Patricia Zambrana Moral,Manuel J. Peláez
Revista de estudios histórico-jurídicos , 2006,
Abstract: El artículo realiza un repaso de la legislación histórica de minas en el Rosellón, Andorra y Catalu a, desde sus más remotos precedentes hasta la difusión del derecho castellano a partir del siglo XVIII en el territorio del antiguo Principado. El examen se centra en el principal problema, que es el de la propiedad de las minas; y se extiende a la constante necesidad de dar en concesión la explotación minera en la legislación del Sur de Francia y de los territorios a que se refiere el trabajo. This is a review of the historic mining legislation in Rosellón, Andorra and Catalonia, from its remotest precedents until the dissemination of the Castilian law from the XVIII century in the ancient Principality’s territory. The analysis focuses on the main problem: the ownership of mines and is broadened to address the ever-lasting need for franchising mining exploitation in the legislation of the South of France and in that of the territories to which this article refers.
Seminarios de 2007 de Historia del Derecho y de las Instituciones, de Derecho Romano y de Derecho Histórico Comparado en la Universitat Pompeu Fabra: (Seminario permanente "Josep Maria Font i Rius")
Patricia Zambrana Moral,Manuel J Peláez
Revista de estudios histórico-jurídicos , 2007,
Abstract:
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