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Search Results: 1 - 10 of 199561 matches for " Alejandro D. "
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Energy Subsidies in Argentina Lead to Inequalities and Low Thermal Efficiency
Alejandro D. González
Energies , 2009, DOI: 10.3390/en20300769
Abstract: Natural gas is the main energy resource for buildings in Argentina. Since 2002, subsidies have kept the prices of this fuel between 9 and 26 times lower than regular prices in other countries. The lowest prices are the result of climate-related subsidies. In cold areas, heating uses several times more energy than locations in Europe with a similar climate. A potential for consumption reductions of up to 70% suggests a very low building thermal performance. The main barriers to finding a solution are the heavy subsidies and public unawareness. Users, government officials, and construction professionals do not identify the very low thermal efficiency. Energy policies to encourage improvements are proposed.
Una estimación de una ecuación gravitacional para los flujos bilaterales de manufacturas Mercosur-Unión Europea
Jacobo, Alejandro D.;
Economia Aplicada , 2010, DOI: 10.1590/S1413-80502010000100005
Abstract: this paper explores the determinants of mercosur-eu bilateral trade flows for 28 manufacturing sectors. in doing so, a gravity equation is estimated for 16 countries for the period 1991-2004. asexpected, the combined output of trade partners, the distance between them, their population and a number of other control variables seem to explain the bilateral trade flows of manufactures.
Analysis by Fourier transform infrared spectroscopy of Johnstonia (Corystospermales, Corystospermaceae) cuticles and compressions from the Triassic of Cacheuta, Mendoza, Argentina
D`angelo,José Alejandro;
Ameghiniana , 2006,
Abstract: spectroscopic information (functional groups and semi-quantitative data) of corystosperm cuticles and compressions from the triassic of cacheuta, mendoza, argentina, is reported for the first time. fossil leaves of johnstonia spp. (corystospermales, corystospermaceae) were analyzed by fourier transform infrared spectroscopy (ft-ir) in an attempt to identify spectroscopic patterns that would characterize these taxa. infrared spectra obtained from cuticles and compressions of johnstonia spp. showed a relatively rich aliphatic structure as well as hydroxyl, carbonyl and some other oxygen-containing functional groups. semi-quantitative data derived from ft-ir spectra were statistically analyzed using one-way analysis of variance test (anova). in the three taxa studied herein, one-way anova revealed significant differences between cuticles and their corresponding compressions regarding the ch2/ch3 ratio (p < 0.05). considering the ft-ir-derived ratios ch2/ch3, al/ox, ox1/ox2 and c-h/c=o, there were not significant differences (p > 0.05) between abaxial and adaxial surfaces in the cuticular samples of johnstonia coriacea var. coriacea (johnston) walkom here studied. infrared-derived ratios here considered (ch2/ch3, al/ox and ar/al) in compression samples did not differ significantly from one taxon to the other (p > 0.05). however, cuticular specimens of johnstonia spp. showed statistical differences (p < 0.05) among the taxa studied, considering ch2/ch3, ox1/ox2 and c-h/c=o ratios. although these results are suggestive of the likely application of ft-ir technique to the chemotaxonomic study of the corystospermaceae, more data are needed before obtaining definitive conclusions.
Los clusters industriales del noreste de México (1993-2003): Perspectivas de desarrollo en el marco de una mayor integración económica con Texas
Dávila Flores, Alejandro;
Región y sociedad , 2008,
Abstract: using the methodology developed by feser and bergman (2000), the industrial clusters of northeast mexico are identified. the economic performance of clusters between 1993 and 2003 is analyzed using regional economic analysis techniques. finally, the opportunities of cluster development are explored within the framework of a greater commercial integration with the state of texas.
México: concentración y localización del empleo manufacturero, 1980-1998
Alejandro Dávila Flores
Economía Mexicana , 2004,
Abstract: Mediante la aplicación de una variante del índice de Gini, se mide la evolución de la concentración geográfica del empleo manufacturero en México. Inicialmente se define el procedimiento para derivar, de una función de distribución regional del empleo manufacturero, la curva de Lorenz. Posteriormente, se calculan los valores del coeficiente de Gini para cada una de las 54 ramas de actividad económica que integran la industria manufacturera. Mediante la utilización de técnicas estadísticas de agrupamiento (cluster analysis), se identifican los niveles de concentración del empleo en cada rama. Así mismo, se calculan los índices de concentración del empleo manufacturero y los coeficientes de localización por rama, para cada una de las 32 entidades federativas que integran la república mexicana. Los datos se agrupan en regiones más amplias, con el propósito de identificar los patrones sectoriales y regionales de localización de la manufactura y su evolución entre 1980 y 1998.
Tijuana′s Dynamic Unemployment and Output Growth
Alejandro Díaz Bautista
Frontera norte , 2003,
Abstract: En la década pasada, México estableció un programa de reformas económicas y de libre comercio encaminadas a la completa reestructuración de su economía. Sorprendentemente, el proceso de reforma tiene poco impacto en el desempleo. Un análisis de las tendencias indica que, aun en los peores trimestres de la crisis económica, la tasa de desempleo promedio no fue mayor de 7.4%. La tasa de desempleo trimestral de la ciudad de Tijuana en 2001 alcanzó en promedio 0.725%, en un período donde inició una recesión en la economía. Estas cifras son bajas al ser comparadas con las de otros países. El objetivo del estudio es evaluar los choques transitorios de la demanda y los permanentes de la oferta en el desempleo en Tijuana en diferentes períodos. Para ello utiliza la restricción de identificación y la metodología de raíz unitaria con corte estructural. La ley de Okun también es verificada para conocer la evolución del desempleo en Tijuana.
Caso Quirúrgico: SCREW 2 mm.
Carranza, Alejandro D.
REDVET , 2008,
Abstract: Quisiera compartir con ustedes una cirugía realizada el Viernes de lasemana pasada. Se trata de una paciente Yorkshire de 3 meses de edad llamada "Lilo" que acusó en la balanza (de cocina), la impresionante cifra de 1 kilo 200gr. (puro pelo resultó).
Los clusters industriales del noreste de México (1993-2003). Perspectivas de desarrollo en el marco de una mayor integración económica con Texas
Alejandro Dávila Flores
Región y sociedad , 2008,
Abstract: Con la metodología de Feser y Bergman (2000), se identifican los clusters industriales del noreste de México. Con técnicas de análisis económico regional, se evalúa su desempe o económico de 1993 a 2003. Finalmente, se exploran sus oportunidades de desarrollo en el marco de una mayor integración comercial con el estado de Texas.
Trapping with biased diffusion species
Alejandro D. Sanchez
Physics , 1999, DOI: 10.1016/S0378-4371(00)00196-5
Abstract: We analyze a trapping reaction with a single penetrable trap, in a one dimensional lattice, where both species (particles and trap) are mobile and have a drift velocity. We obtain the density as seen from a reference system attached to the trap and from the laboratory frame. In addition we study the nearest neighbor distance to the trap. We exploit a stochastic model previously developed, and compare the results with numerical simulations, resulting in an excellent agreement.
Molecular Phylogeny of the Philippine Endemic Genus Antherostele Bremek. (Rubiaceae) Inferred from ITS Data (nrDNA) and Its Conservation Status  [PDF]
Jasper John A. Obico, Grecebio Jonathan D. Alejandro
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.310169
Abstract: Antherostele Bremek. is an understudied genus of Rubiaceae endemic to the Philippines formerly comprising four species of shrubs or small trees distributed in Luzon and Visayas. In this first molecular study of the genus, the ITS (nrDNA) was utilized to determine the monophyly of Antherostele, reconstruct its phylogeny, and resolve its placement in Rubiaceae. Furthermore, an update on the assessment of its conservation status of the included species in the genus was done. Antherostele is monophyletic and is nested within the tribe Urophylleae of subfamily Rubioideae which confirms its segregation from Urophyllum and its placement within Urophylleae as proposed by earlier authors based on morphology. However, the relationships of Urophylleae members remain unresolved. Antherostele is united by reflexed corolla, hairs on upper side of the corolla lobes and syngenesious stamens. The montane A. luzoniensis with small leaves is found to be sister to the rest of Antherostele species. Antherostele is hypothesized to originate from montane regions and diversified by forming larger leaves following dispersal to the shaded forest understory. From the five species of Antherostele currently recognized in the study, two are endangered (A. banahaensis, A. grandistipula) and three are critically endangered including a new species (A. callophylla, A. luzoniensis, A. sp. nov.) following the criteria of IUCN.
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