3,951 research outputs found
Edmund Husserl y José Blanco Regueira: paralelismo de críticas fundamentales
El título del presente escrito a primera vista a algunos lectores parecerá
osado, se pensará que posiblemente la distancia entre ambos pensadores
es inconmensurable, uno de ellos —caso de Husserl— es considerado
un hito del pensamiento filosófico de occidente. El otro, y debido a la cercanía
tanto en tiempo como en afectos se creerá que se plantea al lado del hito más
por el susodicho afecto que por sus méritos como pensador. Cabe hacer mención
que el autor de estas líneas está consiente de las posibles críticas por la supuesta
diferencia de estatura entre los dos pensadores aquí traídos a colación, sin
embargo, espero mostrar que la legitimidad de la compaginación entre ambos
pensadores no se funda en el afecto —que en realidad esta implícito y del cual
me sería imposible despojarme, pues José Blanco aparte de mi maestro fue y
sigue siendo para mí una persona entrañable— tal compaginación la fundo en
la idea expresada por Eduardo Nicol: cuando un pensador proclama no sólo lo
hace para su crecimiento particular, sino que lo hace para contribuir con un
grano más para el desarrollo de la historia de la Filosofía, en la cual están
inmersos todos aquellos que de modo serio y riguroso trabajan sobre tales
pensamientos y proclamas consideradas como filosóficas. Así pues; al seguir
esta idea se parte del supuesto de que lo importante son los hilos de pensamiento
que los filósofos tienden entre sí, —hilos conductores por los cuales corre la
tradición y sus problemas—. De esta manera; la distancia entre un pensador
considerado un hito, sin el cual sería imposible concebir la Filosofía contemporánea
tal como la conocemos —caso de Husserl— y un filósofo contemporáneo
aquejado por el mismo tábano filosófico y también pendiente de los mismosproblemas y vectores por los cuales se conduce la Filosofía contemporánea —
caso de José Blanco— es realmente nula. De modo que, si la empatía o intento
de compaginación entre el pensamiento de ambos filósofos se ve bajo la luz
que revela los motivos que propician la reflexión de tales pensadores, se
observará que el puente tendido entre ellos mediante el presente artículo intenta
ser de una legitimidad plenamente filosófica
La destrucción de la ontología clásica en la obra de Heidegger y Merlau-Ponty
Se desarrolla la superación de la metafísica clásica a través del tópico de la deconstrucción ontológica a partir de dos autores fundamentales del siglo XX tales como son Heidegger y el francés Merleau-Pont
Study on differential expression of 1-aminocyclopropane-1-carboxylic acid oxidase genes in table grape cv. Thompson Seedless
As a consequence of the non-climacteric status of grapes (Vitis vinifera), ethylene biosynthesis and signal transduction have scarcely been studied in this fruit. In spite this drawback, the available information suggests a role for ethylene in ripening grape berries. In this work, we report the identification of three homologous genes that encode 1-aminocyclopropane-1-carboxylic acid oxidase (ACO), a key component of ethylene biosynthesis. A comparison of protein sequences revealed that all three VvACOs harbor a 2OG-Fe(II) oxygenase domain, which is typical of the ACO gene family; however, VvACO1 showed a higher amino acid sequence homology with VvACO2 than with VvACO3. The expression pattern of VvACOs and the effect of exogenous ethylene on their transcript accumulation were evaluated during table grape berry development in the “Thompson Seedless” cultivar. A peak in VvACO1 transcript accumulation levels was registered around veraison that was 4-fold higher than at harvest, and this peak was confirmed during a second season in grapes that were harvested from three different vineyards. An enhancement in ethylene production and VvACO genes transcript levels was observed in grapes sprayed with ethephon during berry development. However, VvACO1 transcripts reached the highest accumulation earlier than VvACO2 and VvACO3. Altogether, these data confirmed that ethylene may have a role in some aspects of the grape ripening process, and they also highlighted the potential use of some VvACO genes as molecular markers for identifying grape veraison stages in grapes
Gas Hydrate and Free Gas Concentrations in Two Sites inside the Chilean Margin (Itata and Valdivia Offshores)
Two sectors, Itata and Valdivia, which are located in the Chilean margin were analysed by using seismic data with the main purpose to characterize the gas hydrate concentration. Strong lateral velocity variations are recognised, showing a maximum value in Valdivia offshore (2380 ms−1 above the BSR) and a minimum value in the Itata offshore (1380 m·s−1 below the BSR). In both of the sectors, the maximum hydrate concentration reaches 17% of total volume, while the maximum free gas concentration is located Valdivia offshore (0.6% of total volume) in correspondence of an uplift sector. In the Itata offshore, the geothermal gradient that is estimated is variable and ranges from 32 °C·km−1 to 87 °C·km−1, while in Valdivia offshore it is uniform and about 35 °C·km−1. When considering both sites, the highest hydrate concentration is located in the accretionary prism (Valdivia offshore) and highest free gas concentration is distributed upwards, which may be considered as a natural pathway for lateral fluid migration. The results that are presented here contribute to the global knowledge of the relationship between hydrate/free gas presence and tectonic features, such as faults and folds, and furnishes a piece of the regional hydrate potentiality Chile offshore
Applications of low enthalpy geothermal energy: the case of the Faculty of Physical and Mathematical Sciences at the University of Chile
In recent decades, the industry has observed a significant shift towards the use of renewable energy, such as solar, wind and geothermal. The Chilean scenario has not been an exception, and much progress has been made in sustainable energy prospection and implementation, especially in the electricity sector, where solar and wind power amount 2300 MW, and since April 2017, the first geothermal power plant (48 MW) has come into operation. In the area of low enthalpy geothermal energy, the use is around 19 MW. The Faculty of Physical and Mathematical Sciences at the University of Chile has been contributing to this transformational process, with its Sustainable Campus initiative. The first step of this initiative is the introduction of renewable energy on site, which has been achieved through the installation of a solar photovoltaic plant of 15 kW. Along this line, the design and implementation of a geothermal air conditioning system (HAVC) is underway, which will serve the classrooms and offices in the traditional engineering building of the campus. The technology to be used in this project is the Ground Heat Pump (GHP). The present paper includes an introduction of the applications of low enthalpy geothermal energy in Chile, a description of the Office of Engineering for Sustainable Development at the Faculty of Physical and Mathematical Sciences, and the design of a geothermal HAVC system in the university campus, considering economic, environmental, technical and social aspects. Besides the operation of the GHP, the system will be used for teaching purposes to incorporate sustainable development in the curriculum of the university. The expected savings of the geothermal system versus an aerothermal design are 41,070 kWh annually, considering both cooling and heating.This research was partially funded by the Andean Geothermal Center of Excellence (CEGA) and the Complex Engineering Systems Institute, ISCI (Project CONICYT: FB0816)
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