Aurelio Fernández, La libertad en el pensamiento griego. Crisis, Revista Española de Filosofía, Nº 85, enero-marzo 1975; ps . 100-115.

Fil: Rego, Francisco

La filosofía de Benjamin Aybar

Fil: Rego, Francisco

Neotectonics in northeastern Brazil

The thesis describes neotectonic deformation in the continental intraplate region of northeastern Brazil and explores its links with modern seismicity. The region, which is under E-W-oriented compression and N-S-oriented extension, shows shallow earthquake swarms which last for several years and include 5.0-5.2 mb events. Remote sensing, borehole and geophysical data, in conjunction with field structural information, indicate a continuous faulting process since the Miocene which has reactivated Cretaceous faults and Precambrian shear zones or in places generated new faults which cut across existing structures. Three main sets of faults are recognised across the area: a NE-striking set, a NW-striking set and a N-striking set. The first and the second sets are pervasive and their cross-cutting relationships show that they locally form a conjugate set and display both a strike-slip and a dip-slip component of movement. They have generated troughs filled by as much as 260 m of Cainozoic sediments. Radiocarbon dating shows that some of the faults slipped as recently as 4,041-3,689 cal. yr BP. Although the elevation of coastal deposits is consistent with the predictions of glacioisostatic models for the area, tectonic influence can be detected notably near the Carnaubais fault, where rapid emergence by at least 5 m to the east of São Bento occurred 4,080-2,780 cal. yr BP. Secondary ground failure, which includes hydroplastic deformation, liquefaction and landslides, can be seen in Quaternary alluvial sediments and is reported in the historical record. The present data show that the potential for large earthquakes in northeastern Brazil has been underestimated. Empirical relationships using liquefaction and surface rupture point to events of at least Ms=6.8 compared to a maximum mb = 5.2 recorded instrumentally. The finding that NE- and NW-trending faults are favourably orientated for reactivation in relation to the current stress field is of potential value for seismic hazard assessment

Size-dependent pattern of wilfire ignitions in Portugal: when do ignitions turn into big fires ?

Not all wildfire ignitions result in burned areas of a similar size. The aim of this study was to explore whether there was a size-dependent pattern (in terms of resulting burned area) of fire ignitions in Portugal. For that purpose we characterised 71,618 fire ignitions occurring in the country in the period 2001–2003, in terms of population density in the local parish, land cover type and distance to roads. We then assigned each ignition into subsets of five classes according to the resulting burned area:[5 ha, [50 ha,[100 ha,[250 ha,[500 ha. The probability of an ignition resulting in different burned area classes was modelled using binary logistic regression, and the relative importance, strength and signal (positive or negative) of the three explanatory variables compared across the models obtained for the different classes. Finally, we explored the implications of land cover and population density changes during the period 1990–2000 in Portugal for the likelihood of ignitions resulting in wildfires[500 ha. Population density was the more important variable explaining the resulting burned area, with the probability of an ignition resulting in a large burned area being inversely related to population density. In terms of land cover, ignitions resulting in large burned areas were more likely to occur in shrubland and forest areas. Finally, ignitions farther away from roads were more likely to result in large burns. The current land cover trends (decrease of agricultural land and increase in shrublands) and population trends (decline in population densities except near the coast) are increasing the probability that ignitions will result in large fires in vast regions of the country

Characterizing and modelling the spatial patterns of wildfire ignitions in Portugal: fire initiation and resulting burned area

Modelling, Monitoring and Management of Forest FiresAccording to the statistics Portugal has the highest density of wildfire ignitions among southern European countries. The ability to predict ignition occurrence constitutes an important tool for managers, helping to improve the effectiveness of fire prevention, detection and fire fighting resources allocation. In this study we used a database with information about 127 490 fire ignitions that occurred in Portugal during a five year period. We performed frequency analysis to characterize the occurrence of wildfire ignitions in relation to both human and environmental variables and compared the spatial patterns of ignitions which originated fires larger or smaller than 500 ha. We also used logistic regression models to predict the relative probability of ignition occurrence, as a function of the resulting fire size. Results show that fire ignitions are strongly related to human presence and activity, and that the spatial patterns of ignitions are different for larger or smaller wildfires. Larger wildfires started in areas with lower population density, more distant from the main roads and at higher elevations, when compared to smaller fires, and also started more frequently in shrublands and forested areas. The results obtained can be useful in decision making for fire danger managementinfo:eu-repo/semantics/publishedVersio

Regeneration of Pinus pinaster forests after wildfire

Wildfires are of extreme importance in Pinus pinaster forests of central and northern Portugal. Reforestation plans after wildfires are generally made without consideration for the possibility of natural regeneration. This paper addresses the question of the factors responsible for the occurrence of natural regeneration and concludes that litter accumulation, rock outcrops, slope, aspect, harvest, fire characteristics, and stand age are well related to the regeneration observed. Limitations of the model proposed are discussed

El concepto de persona en el Scriptum super Sententiis Petri Lombardi de Santo Tomás

El Aquinate, en su Comentario a los cuatro libros de las Sentencias de Pedro Lombardo, se pregunta si es aplicable en el campo teológico la definición de persona sostenida por Boecio para iluminarla naturaleza de los sujetos trinitarios sin caer por ello en un politeísmo, y para afirmar además la encarnación del Verbo sin negar la doble naturaleza de Cristo. Teniendo en cuenta que dicha cuestión fue objeto de agudas controversias tanto antes como después del Concilio de Nicea, y que, luego de Boecio, también lo fue para los más destacados maestros medievales; es conveniente por tanto efectuar un breve seguimiento histórico del problema, deteniéndose así en los antecedentes más próximos a Santo Tomás, para luego, a partir del Scriptum super Sententiis Petri Lombardo, indagar sobre las razones que movieron al Aquinate a insistir sobre la aplicación del concepto de persona en el ámbito teológico.Thomas Aquinas, in his Scriptum super Sententiis Petri Lombardi, wonders if, in the theological field there is applicable the definition of person supported by Boecio to illuminate the nature of the trinitarian subjects, without falling down in a polytheism, and to affirm the embodiment of the Verb, without denying Christ’s double nature. If it is born in mind that the above mentioned question was an object of sharp controversies so much earlier as after the Council of Nicea, and that, after Boecio, also it was for the most out-standing medieval teachers, it becomes suitable to carry out a brief historicalpursuit of the problem, stopping in the precedents of Saint Thomas, for then, from the Scriptum super Lombard Sententiis Petri, to investigate on the reasons that they moved to the Aquinate to insist on the application of the person’s concept in the theological ambience.Fil: Rego, Francisco

El concepto de persona en el Scriptum super Sententiis Petri Lombardi de Santo Tomás

El Aquinate, en su Comentario a los cuatro libros de las Sentencias de Pedro Lombardo, se pregunta si es aplicable en el campo teológico la definición de persona sostenida por Boecio para iluminar la naturaleza de los sujetos trinitarios sin caer por ello en un politeísmo, y para afirmar además la encarnación del Verbo sin negar la doble naturaleza de Cristo. Teniendo en cuenta que dicha cuestión fue objeto de agudas controversias tanto antes como después del Concilio de Nicea, y que, luego de Boecio, también lo fue para los más destacados maestros medievales; es conveniente por tanto efectuar un breve seguimiento histórico del problema, deteniéndose así en los antecedentes más próximos a Santo Tomás, para luego, a partir del Scriptum super Sententiis Petri Lombardo, indagar sobre las razones que movieron al Aquinate a insistir sobre la aplicación del concepto de persona en el ámbito teológico