Showing papers by "University of Oviedo published in 1970"

Cover and Basement Tectonics in the Cordillera Oriental of Colombia, South America, and a Comparison with Some Other Folded Chains

Abstract: The Cordillera Oriental of Colombia is built of Mesozoic and Tertiary strata, deformed chiefly during Tertiary orogenesis. These materials form a sedimentary cover, overlying a basement of lower Paleozoic (and Precambrian?) metamorphic and igneous rocks, and of little deformed and nonmetamorphic Upper Paleozoic rocks, which often behaved mechanically as part of the cover. No metamorphism took place during the Tertiary orogenesis, and the main structural features of the chain are determined by the relationship between basement and cover. The basement crops out within the chain in two massifs, Santander and Quetame-Garzon, arranged en echelon. The general structure of the chain is that of a raised block between the Magdalena Valley and Los Llanos of eastern Colombia. Tilting, differential lift, and faulting produced differences in height of the order of 10,000 m in the upper surface of the basement. The faults in the basement are reverse faults, often high-angle reverse faults (some of them reactivated normal faults of pre-Cretaceous age), some of which have been active until Quaternary times (Suarez fault). It is possible that strike-slip occurred along some faults, as has been suggested for the Santa Marta (= Bucaramanga) fault and for many faults in the Caribbean area. A rather narrow strip in the central part of the chain, between the two massifs shows a more tightly folded structure. The sedimentary cover shows different reactions to basement tectonics: (1) passive behavior (undeformed or tilted cover on basement blocks); (2) simple draping structures (monoclinal flexures overlying basement faults; asymmetrical gentle folds); (3) more complex, tight structures, where the basement has a less rigid behavior; (4) independent behavior of the cover, due to gravity (collapse structures), to injection (salt of the “Sabana de Bogota”), and to disharmonic relationships. Thus, the Cordillera Oriental of Colombia shows a series of different examples of the relationship between basement and cover structures. The Cordillera Oriental constitutes the external zone of the Andean System in Colombia, in sharp contrast to the internal zones (eugeo-syncline), with their volcanism of Cretaceous age, their plutonism, and their metamorphism. Such mountain chains as the Appalachians, the Cantabrian Chain, the Alps and the Betic System are characterized by tangential tectonics (nappes), structures facing regularly toward the outside of the chain, and a general decollement of the cover. However, the Cordillera Oriental shows a fan structure, more related to the structure of such mountain chains as the Pyrenees.

La programación por competencias básicas: hacia un cambio metodológico interdisciplinar

Abstract: The inclusion of the competences in the Curriculum is generating certain problems, in the programming as well as in its development in the classroom. Its inclusion should not be understood as just another element, but, precisely, the conceptual and methodological change comes from the consideration of the competences as the axis around which all curricular elements must spin. In this paper, a methodological-prospective proposal is shown according to which this change in the process will have to be planned in two levels: inside and outside the classroom, through cooperative and interdisciplinary teachers’ work.

Genetics and conservation of rare and endemic plants: the case of "Genista sanabrensis" (Fabaceae) in the Iberian Peninsula

Abstract: Genista sanabrensis Valdes Berm., Castrov. & Casaseca (Fabaceae) is an endemic and rare species of the Northwestern Iberian Peninsula. Despite its limited distribution, the species is locally abundant and therefore not categorized by the IUCN criteria as threatened at the national level. However, comprehensive studies on the genetic diversity and structure of rare and endemic species from Iberian Peninsula are urgently needed to promote effective conservation and management activities. Therefore, we conducted amplified fragment length polymorphism (AFLP), nuclear rDNA (ITS, ETS) and plastid regions ( trnL, trnL-F , matK , rbcL ) analyses to characterize the genetic diversity and variation of this species within and between populations. Our results confirm the monophyly of the species compared to closely related taxa. The presence of insertions/deletions together with point mutations makes the northern populations indispensable in the elaboration of conservation strategies. Genetic diversity was moderate/low, although the survival of these populations at the genetic level shows no signs of being threatened. This study provides important insights into the genetic structure of G. sanabrensis with potential applications to its effective conservation.

Evaluación de las percepciones del alumnado sobre la utilización del inglés como lengua de instrucción en la universidad

Abstract: Este articulo analiza el nivel de satisfaccion de los estudiantes de grados impartidos en ingles en una universidad espanola. En concreto, la investigacion se centra en el estudio de las percepciones de los estudiantes sobre la implementacion de los grados bilingues y el impacto que estos programas puedan tener en tres ambitos: la competencia de los alumnos en ingles, la promocion de su dimension internacional, y la mejora de sus perspectivas profesionales. La muestra se compone de 255 estudiantes matriculados en grados bilingues. En el trabajo se utiliza una metodologia cuantitativa y descriptiva y los datos fueron analizados con SPSS. Aunque el grado de satisfaccion general de los alumnos es bastante alto, las conclusiones del estudio permiten identificar propuestas de mejora para la implementacion de programas bilingues en contextos similares.

Origen y consolidación de los conventus iuridici en el noroeste peninsular

Abstract: Toda una serie de hechos fechados en torno a la decada de los 50 del siglo I de nuestra era nos llevan a pensar que seria el emperador Claudio quien no solo pondria en explotacion los recursos mineros del norte peninsular con cierta intensidad, sino tambien el funcionamiento de los conventus iuridici como subdivisiones provinciales en dicho suelo. Sobresalen entre ellos la desmilitarizacion del norte peninsular (con la desaparicion de los distritos), el aprovechamiento agricola de los prados militares, la reconversion de funciones de los soldados establecidos en dicho espacio geografico, la presencia de militares (legionarios y auxiliares) en zonas mineras, el cese de las acunaciones monetarias en suelo hispano y el funcionamiento de los conventus juridicos con todas sus consecuencias.

La heterogeneidad estructural de las pseudopartitivas en español

Abstract: The classic difference between partitive and pseudo-partitive constructions (Selkirk 1977) is fully stablished in today’s linguistics. In the literature, however, they do not notice that the group of pseudo-partitives ―as it has been described in grammatical studies of Spanish― is heterogeneous from a structural point of view. The aim of this paper is to show that two radically different syntactic schemes underlie the label of pseudo-partitives. This systematic lack of differentiation is because of the fact that both structures have the same distribution of semantic-pragmatic components: a quantifier and a quantified (in that order) plus the preposition de in between (‘quantifier + de + quantified’).

Desigualdade e crecemento económico: círculos viciosos ou virtuosos?

Abstract: As relacions entre desigualdade e crecemento economico foron obxecto dun amplo debate conceptual e empirico que se prolongou ao longo do tempo sen alcanzar un consenso. O efecto do crecemento sobre a desigualdade foi estudado por Kuznets (1955), cuxa hipotese postula que a desigualdade aumenta inicialmente co crecemento para posteriormente diminuir tras un punto de retorno. Este modelo de U-invertido foi estendido por Anand e Kanbur (1993), e o seu contraste empirico conduce a conclusions dispares segundo a informacion, os indicadores e os metodos empregados. Con respecto ao impacto da desigualdade sobre o crecemento, os traballos de Lewis (1954) e Kaldor (1956) defenden a existencia de efec-tos positivos, mentres que os de Alesina e Rodrick (1994), Persson e Tabellini (1994) ou Deininger e Squire (1998) postulan relacions negativas. Dado que a diversidade de hipoteses e resultados empiricos impide obter conclusions sobre a existencia de circulos viciosos ou virtuosos entre desigualdade e crecemento, neste traballo proporcionamos nova evidencia incorporando a analise a renda nun dobre sentido: como criterio de clasificacion de paises e, desde unha optica socioeconomica, distinguindo entre a desigualdade relativa a rendas baixas e altas.

Austeridad y reforma del bienestar en la Europa del Sur. Transformación y heterogeneidad institucional

Abstract: Esta nota de investigacion examina comparativamente el cambio institucional reciente de los Estados del bienestar en los paises del Sur de Europa. La irrupcion de la crisis economica y financiera en 2008 dispuso un nuevo escenario para la reforma del bienestar. Los sistemas de proteccion social se enfrentaron a una coyuntura de transformacion bajo condiciones de elevada presion politica y economica. La respuesta a la crisis se asocio a la austeridad en el gasto publico y al rediseno institucional de las provisiones de bienestar, con el objetivo de recuperar la estabilidad fiscal, la solvencia del sector publico y la competitividad exterior. El efecto de las politicas de austeridad ha sido la aparicion de senderos de transformacion institucional diferenciados dentro del modelo de bienestar Mediterraneo.

El contenido, la forma y la palabra. El debate obrerista en torno a la democracia y el parlamentarismo en el período de entreguerras

Abstract: This article seeks to explore the connections between the process of democratization and the labor movement from the dictatorship of Primo de Rivera to the Second Republic. Contrary to commonly considered, here we will defend that the process leading to April 14th started from bottom up, maturing for a long time during the dictatorship, being its hegemonic agent (at least in Barcelona) the workerism. In order to do this, we will discuss the interpretation of democracy in studies, and review some consensus historiography of the period, while we will try to analize the democratic conception present in the labor movement.

La construcción de una memoria del linaje regio. La noción de panteón dinástico de la dinastía asturleonesa (ss. IX-XI)

Abstract: The Kingdom of Asturias founded after the Muslim invasion developed a legitimizing ideological discourse in which “continuity” played a fundamental role. Continuity both with the lost Hispano- Goth ideal and with the dynastic line itself. Among the elements that would play an important role in the political vision and ideological construction of the fledgling kingdom is the design of a royal memory through the use of royal burial spaces as a propagandistic instrument for maintaining the stability of the lineage and for legitimising continuism. Constructing a royal pantheon dating back to early times contributes towards crystallising the idea of a “lineage” or “royal dynasty” that was conscious, stable and enduring. This makes the pantheon a material deposit of Astur legitimacy and a true monument to the lineage. The article focuses on architectural styles, models of behaviour for royalty and even types of art that would endure, subsequently repeating themselves and associating themselves in people’s minds with funerary memorial buildings, even surviving the court’s change of location (which would mean new pantheons had to be built) and the occupation of the throne by new dynasties.

Application of Mexican Management Method for Unevenaged Forests (MMOBI) to natural mixed stands in Asturias (northern Spain)

Abstract: El Metodo Mexicano de Ordenacion de Bosques Irregulares (MMOBI) es el sistema de gestion forestal de cubierta forestal continua empleado habitualmente en el estado de Durango (Mexico). La selvicultura que se aplica en el MMOBI consiste en cortas de seleccion individual (o entresaca arbol a arbol), buscando una distribucion diametrica en forma de J invertida. En este trabajo se analiza la aplicacion del MMOBI en las masas naturales mixtas de Asturias (norte de Espana) representadas en los estratos numeros 4 y 9 del Tercer Inventario Forestal Nacional, formados mayoritariamente por frondosas caducifolias. Se ha calculado para cada genero la distribucion diametrica real y se ha estimado la ideal segun el MMOBI. El porcentaje de intensidad de corta (IC%) fue generalmente bajo en el estrato 4, siendo inferior al 20% en la mayoria de los generos excepto en Fraxinus y Acer con IC >50%. En el estrato 9 la IC% fue generalmente mas alta que en el estrato 4, aunque tambien fue de baja a intermedia, excepto para el genero Tilia con IC >50%, cuyos arboles se suelen incluir en el Green Tree Retention. El MMOBI se presenta como una alternativa de gestion para masas con un caracter preferente protector.