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Search Results: 1 - 10 of 425704 matches for " Jorge M. Romero "
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Development of a “Space-Saving Model” for a One-Family Dwelling Case Study of Japanese Architecture with Space Limitations  [PDF]
Jorge Romero
Journal of Building Construction and Planning Research (JBCPR) , 2015, DOI: 10.4236/jbcpr.2015.34020
Abstract: The rapid globalization of building standards and codes in regards of contemporary housing and the growth of populations during this century demands an immediate response from designers in terms of space rationalizing to fulfill the forthcoming lack of architectural habitat on earth. The differences in culture imply a difference in the way of living, and the way of living indicates a contrast in the way of designing houses. A western house does not need an extra room covered with tatami mats for relaxation as a modern Japanese home would most likely do, as a separate living-like space. Organizations, among others, like CABO (Council of American Building Officials) and, in our specific case study, BCJ (Building Center of Japan) together with BRI (Building Research Institute) try to overcome these differences to provide better housing conditions to the world through the formulation of global designing and building standards. International publications like UBC (Uniform Building Code), IBC (International Building Code), OTFDC (One and Two Family Dwelling Code) and BSLJ (Building Standard Law of Japan) have also played an important role to globalize safety and design codes to better understand global housing under normal conditions. However, space limitations and concentration of human masses in mega cities result in a crucial new consideration: the urgent need of investigating the possibilities of rationally living within less space. Minimums provided by most codes do not take into account the space issue and overpopulation of large cities. Providing with some design recommendations for one-family dwellings has been the departure point and main motivation to carry out this case study based on actual buildings with the lack of space conditioning in a country where these conditions turn into reality.
Speech Assessment for UIDE EFL Students: The IPA Case
—General-American English IPA Transcription to Assess Universidad Internacional del Ecuador EFL Students
 [PDF]

Jorge Romero
Open Journal of Modern Linguistics (OJML) , 2016, DOI: 10.4236/ojml.2016.62005
Abstract: This Teaching English as the target second language involves several considerations which have to do with both the source language of speakers and the kind of training these students go through. In this particular case study, I have considered native speakers of Spanish who study English as a second language and identified, through two vowel sounds forming a minimal pair, that phonemes of General American English which are more likely to be mispronounced, is not only due to the fact that the English vowel system is more complex than that of Spanish, but also, and most important for this particular case study, that training is not consistent in contrastive exercising as it is in distribution exercising. In fact the English system has 20 vowel phonemes in Received Pronunciation, from 14 to 16 vowel phonemes in General American English and even 20 to 21 vowel phonemes in Australian English, while Spanish has only 5 vowel phonemes. The findings of this research account for the conclusion that exercising reinforcement need to be addressed and focused not only on the phonemes of the English vowel system which native speakers of Spanish have more trouble with, but also and more relevant in this research, that new and creative distribution exercising must be included in textbooks to help students master the English vowel sounds in order to avoid accent due to Spanish interference through quality English teaching.
Thermal Decomposition of Diphenyl Tetroxane in Chlorobenzene Solution  [PDF]
Alexander G. Bordon, Andrea N. Pila, Mariela I. Profeta, María J. Jorge, Lilian C. Jorge, Jorge M. Romero, Nelly L. Jorge
International Journal of Organic Chemistry (IJOC) , 2019, DOI: 10.4236/ijoc.2019.91001
Abstract: The thermal decomposition of Cyclic Diperoxide of Benzaldehyde 3,6-diphenyl-1,2,4,5-tetroxane, (DFT) in chlorobenzene solution in the studied temperature range (130°C - 166°C) satisfactorily satisfies a first order law up to 60% conversions of diperoxide. DFT would decompose through a mechanism in stages and initiated by the homolytic breakdown of one of the peroxidic bonds of the molecule, with the formation of the corresponding intermediate biradical. The concentration studied was very low, so that the effects of secondary reactions of decomposition induced by free radicals originated in the reaction medium can be considered minimal or negligible. The activation parameters for the unimolecular thermal decomposition reaction of the DFT are ΔH# = 30.52 ± 0.3 kcal·mol-1 and ΔS# = -6.38 ± 0.6 cal·mol-1 K-1. The support for a step-by-step mechanism instead of a process concerted is made by comparison with the theoretically calculated activation energy for the thermal decomposition of 1,2,4,5-tetroxane.
Pre-Operational Analysis of a Prototype Downdraft Gasifier Fueled by Bamboo  [PDF]
Julia Salovaara, Hipólito Romero-Tehuitzil, M. Consolación Medrano Vaca, Jorge Huacuz Villamar
Journal of Sustainable Bioenergy Systems (JSBS) , 2015, DOI: 10.4236/jsbs.2015.52006
Abstract: Biomass gasification is a thermochemical conversion process that dates back to the 19th century. Nevertheless, designing and operating a gasifier system is not an easy task. Every biomass feedstock has different characteristics and the gasifier needs to be designed according to those qualities. Hence, many laboratory analyses on bamboo were carried out for this study. This study also concentrates on finding the best possible process variables for a bamboo fueled downdraft gasifier through a sensitivity analysis. A software program called Thermoflex was used for this purpose and the effect of gasifier temperature, air-fuel-ratio, moisture content of the fuel and temperature of pre-heated air on the syngas composition were simulated. The results show that bamboo is a decent gasification feedstock because of its low ash and sulfur content and satisfactory energy value. The simulations reveal that the best gas quality is obtained with the gasifier temperature between 700 and 800, A/F-ratio of 1.25 - 1.75 and dry basis moisture content between 10% and 15%.
Diffuse Large B-Cell Lymphoma with Anaplastic Clear Cells: A Rare Variant  [PDF]
Mónica Belinda Romero-Guadarrama, Leslie Elizmara Aguilar-Ayala, German Ott, Jorge Pérez-Espinosa
Open Journal of Pathology (OJPathology) , 2012, DOI: 10.4236/ojpathology.2012.24028
Abstract: Introduction: Diffuse Large B-Cell Lymphoma (DLBCL) is a heterogeneous group conformed by morphological and clinical varieties of neoplasms; it originates from peripheral B-cells and is distinguished into three groups: germinal center (GC), activated B lymphocyte (ABL), and the third type. The existence of DLBCL with anaplastic morphology and expression of CD30 without t (2; 5) translocation is rare. The aim of the present article is to describe this morphologic variant in a 54-year-old woman and a 74-year-old man, respectively. Materials and Methods: Patients diagnosed with DLBCL with anaplastic variant were identified from the surgical pathology records. Results: Out of 357 biopsies with this diagnosis, 11 (3%) corresponded to the anaplastic variant, 2 presented morphological clear cells; they became visible because of an increase in volume in the cervical area of 4 months of evolution, usually associated to diaphoresis and weight loss with clinical fulminating progression. An autopsy study was performed to one patient and it showed infiltration in supraclavicular lymph nodes, thyroid, and lung. The neoplastic cells presented abundant clear cytoplasm and pleomorphic nuclei that expressed CD20, CD30 and CD45. Conclusion: This variation is rare. The clinical presentation and prognosis are controversial; we present the morphological and immunophenotype changes of this variant. The differential diagnosis from other clear cell neoplasms should be made.
COMPORTAMIENTO REFRACTARIO DE PROBETAS DE MORTEROS CONFORMADAS CON DIATOMITAS COMO AGREGADO MINERAL
Rodríguez,Ana M; Romero,Jorge W; Castro Olivares,Eleodoro;
Revista Colombiana de Química , 2005,
Abstract: on the search of new applications for regional mining resources the aim of this work is to study the pozzolanic properties of some minerals which may potentially react with the protlandite contained in portland cement pastes and mortars. the possibility that these mineral additions may also increase thermal resistance and refractarity is also studied by measuring, as a parameter, the mechanical strength variations of standardized probe. in this search, natural silico-aluminates minerals resources (diatomites) are selected and chemical compositions of which are very similar to the natural pozzolanes, referred to as "active" in the literature. the programmed experimental development consists in thermal treatment of the mineral and size reduction so that it became compatible with cement grain size, pozzolanity analysis, construction of mortar probes. mechanical residual properties of the probes are measured after exposure to high temperature. by analyzing the experimental results it may be concluded that the aggregate under study certainly shows pozzolanic properties and in addition, it improves the residual mechanical resistance of the probes.
Rese a de "Autobiografía. Volúmenes 1, 2 y 3" de B.F. Skinner
Jorge Romero
Revista Latinoamericana de Psicología , 1982,
Abstract:
Veneno de Latrodectus mactans de Chile (Araneae, Theridiidae): su efecto sobre músculo liso
Romero M.,Fernando; Altieri M.,Elena; Urrutia A.,Mauricio; Jara H.,Jorge;
Revista de Biología Tropical , 2003,
Abstract: the venoms of latrodectus sp. have been reported to induce contraction probably mediated by adrenergic and cholinergic transmitters. we have demonstrated that the venom of chilean latrodectus mactans contains neurotoxins that induce a contraction partially independent of transmitters release. transmembrane mobility of na+ and ca2+ ions and more specifically, the increase of cytoplasmic calcium concentration are responsible for tonic contraction in smooth muscle. calcium may enter the cell by several ways, such as the voltage-dependent ca2+ l-type channels and the na+ /ca2+ exchanger. this study aimed to examine the participation of this exchanger in the tonic contraction of smooth muscle in vas deferent of rat induced by the venom of the chilean spider l. mactans. blockers of na+ channels (amiloride) and ca2+ l-type channels (nifedipine), and a stimulator of the exchanger (modified tyrode, na+ 80 mm) were used. simultaneously, variations of the cytoplasmic concentration of ca2+ were registered by microfluorimetry (fura-2 indicator) in the presence of nifedipine. in presence of amiloride, dose-dependent inhibition of venom-induced contraction was observed, suggesting the participation of voltage-dependent ca2+ l-type channels. the contraction was only partially inhibited by nifedipine and the ca2+ cytoplasmic concentration increased, as assessed by the microfluorimetric registration. finally, the venom-induced contraction increased in the presence of modified tyrode, probably due to the action of the na+ /ca2+ exchanger. taken together, our results support the idea that the na+ /ca2+ exchanger is active and may be, at least in part, responsible for the contraction induced by the venom of chilean l. mactans.
Veneno de Latrodectus mactans de Chile (Araneae, Theridiidae): su efecto sobre músculo liso
Fernando Romero M.,Elena Altieri M.,Mauricio Urrutia A.,Jorge Jara H.
Revista de Biología Tropical , 2003,
Abstract: El veneno de ara as del género Latrodectus induce contracción de músculo liso de mamíferos, postulándose como posible mecanismo la liberación de mediadores adrenérgicos y colinérgicos. El veneno de Latrodectus mactans de Chile contiene neurotoxinas que inducen actividad contráctil en músculo liso en forma parcialmente independiente de actividades adrenérgicas y colinérgicas, lo que deja abiertas interrogantes sobre el mecanismo de acción del veneno. La respuesta tónica en músculo liso depende de la movilidad de los iones sodio (Na+ )y calcio (Ca2+) y, más es-pecíficamente, de la concentración de Ca2+ citoplasmático. Una de las vías de ingreso del calcio al músculo liso, además de los canales tipo L de Ca2+ , es el intercambiador Na+/Ca2+ . En el presente trabajo se estudia la posible participación de este intercambiador en la respuesta tónica inducida por el veneno sobre músculo liso del conducto deferente de rata, en un modelo de órgano aislado. Utilizando bloqueadores de canales de Na+ (amiloride) y Ca2+ (nifedipina) y una solución estimuladora del intercambiador (Tyrode pobre en sodio), se realizaron registros de tensión isométrica inducida por el veneno. Simultáneamente al uso de nifedipina, se registraron las variaciones de la [Ca2+] citoplasmática mediante microfluorimetría. Se observó que la inhibición de la contracción en presencia de amiloride depende de su concentración, mostrando una participación de los canales de Ca2+ dependientes de voltaje en la contracción. En presencia de nifedipina, la contracción inducida por el veneno sólo fue parcialmente inhibida, y la microfluorimetría mostró un aumento de la concentración de Ca2+ citoplasmático en presencia del bloqueador, lo que indica una participación de otros mecanismos para el ingreso de Ca2+ a la célula. Por último, al disminuir la concentración de Na+ extracelular se estimuló la contracción tónica en un 30.7%, atribuible, al menos en parte, al intercambiador Na+/Ca2+ . Estos resultados permiten proponer que el intercambiador Na+/Ca2+ se encuentra activo durante la contracción tónica inducida por el veneno de L. mactans de Chile y podría ser uno de los responsables del desarrollo de tensión. The venoms of Latrodectus sp. have been reported to induce contraction probably mediated by adrenergic and cholinergic transmitters. We have demonstrated that the venom of Chilean Latrodectus mactans contains neurotoxins that induce a contraction partially independent of transmitters release. Transmembrane mobility of Na+ and Ca2+ ions and more specifically, the increase of cytoplasmic calcium concentrat
Molecular Beam Dumps as Tracers of Hadronic Cosmic Ray Sources: the Case of SNR IC443
Yousaf M. Butt,Diego F. Torres,Jorge A. Combi,Thomas M. Dame,Gustavo E. Romero
Physics , 2002,
Abstract: The gamma-ray & neutrino visibility of cosmic ray (CR) accelerators will be dramatically increased by the presence of molecular material abutting such sites due to the increased probability of pion production -- and, in the case of neutral pions, subsequent gamma-decay. This was recognized by Pinkau, Montmerle, and Black & Fazio, and others in the 1970's. In an effort to examine the long-standing -- but unproven -- conjecture that galactic supernova remnants (SNRs) are indeed the sites of nucleonic CR acceleration to <~300TeV/n we have carried out a 3-way coincidence search between the SNRs in Green's (2001) catalog, the GeV range unidentified sources from the third EGRET catalog (Hartman et al.,1999), and molecular clouds, at low Galactic latitudes (|b|<~5 deg). In order to be quantitative regarding the distribution and amount of the ambient molecular masses we have extracted the CO(J=1->0) mm wavelength data from the compilation of Dame, Hartmann & Thaddeus (2001), at the best estimates of the various SNR distances. We outline the overall correlative study and examine the interesting case of SNR IC443, a likely accelerator of CR nuclei.
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