Search results for "47"
showing 10 items of 1382 documents
Slotted Blades Savonius Wind Turbine Analysis by CFD
2013
In this paper a new bucket configuration for a Savonius wind generator is proposed. Numerical analyses are performed to estimate the performances of the proposed configuration by means of the commercial code COMSOL Multiphysics® with respect to Savonius wind turbine with overlap only. Parametric analyses are performed, for a fixed overlap ratio, by varying the slot position; the results show that for slot positioned near the blade root, the Savonius rotor improves performances at low tip speed ratio, evidencing a better starting torque. This circumstance is confirmed by static analyses performed on the slotted blades in order to investigate the starting characteristic of the proposed Savoni…
A Mixed Approach for Determination of Initial Cable Forces in Cable-Stayed Bridges and the Parameters Variability
2015
The determination of initial cable forces in cable-stayed bridges is an important first step in design and analysis of the structure under external loads. Adjustments of stay forces are often required during construction in order to assure the requested behaviour of the bridge in terms of final geometrical configuration and internal force distribution. An accurate assessment of the stay tensioning system allows designers to obtain a good result at the end of construction, by considering the parameters involved as deterministic quantities, assuring the observance of the execution tolerances during works. Actual loads and their variations need instead a stochastic approach which can give usef…
Evaluation of the Safety Performance of Turbo Roundabouts by Means of a Potential Accident Rate Mode
2015
Turbo roundabouts are a particular road intersection layout, designed to increase the safety of double-lane roundabouts, while maintaining their excellent capacity. The main feature of this new concept of roundabout is the impossibility to move from one lane to another, provided by physical barriers marking the lanes. The paper shows an application to turbo roundabouts of a potential accident rate model, aiming to evaluate their safety improvement. Themodel is based on the concept of potential conflict: each vehicle involved in a general intersection performs a series of maneuvers which potentially imply a crash, according to the actual traffic. The number of accidents related to each criti…
Post Feed-in Scheme Photovoltaic System Feasibility Evaluation in Italy: Sicilian Case Studies
2014
: Thanks to national energy policies, over recent years the Italian photovoltaic (PV) sector has undergone an extraordinary growth, also affecting the primary sector. In this context, Mediterranean greenhouses are well-adapted to photovoltaic systems because they represent one of the most energy-intensive sectors in agriculture. The Italian feed-in scheme ended at the beginning of 2013, making it necessary to investigate the feasibility of photovoltaic systems devoid of any electricity production-related incentives. In this paper, production cost and profitability analyses of photovoltaic electricity have been conducted, considering Mediterranean solar greenhouses in which, thanks to net me…
Las fisuras de la nación : tensiones y lecturas político-religiosas sobre la conquista de América en el siglo XVIII
2020
La conquista de América generó una notable cantidad de discursos épicos, de carácter político y literario, que contribuyeron al reforzamiento de los tópicos imperiales, religiosos y patrióticos. Preocupada por la mala imagen del país en el extranjero, las élites políticas e intelectuales al servicio de Carlos III y Carlos IV promocionaron la defensa de los conquistadores, pese a la difusión de una corriente crítica con el heroísmo militar, tangible en la opinión pública europea. En el marco del reformismo borbónico, se reconstruyen los grupos e individuos que, desde lugares y posturas muy diferentes, posibilitaron el éxito de este discurso preponderante, que subrayaba la estrecha colaboraci…
Mujeres ilustradas en el debate de la educación : Francia y España
2004
Isabel.Morant@uv.es Anne Thérèse de Lambert (1647-1733) y Josefa Amar y Borbón (1749-¿1808?), vivieron en contextos diferentes y en momentos distintos de la Ilustración. Su obra educativa sin embargo, permite seguir la polémica europea sobre Mujeres, Ilustración y Educación. En la obra de la marquesa de Lambert, como en Josefa Amar, encontramos los ecos —y la influencia— de los autores que las precedieron, así como de sus contemporáneos. El análisis comparativo de ambas autoras, permite marcar sus particularidades; las similitudes y diferencias que sus obras tienen entre sí y en relación con las ideas circulantes en otros textos y autores significativos. Se destaca su particular defensa de …
Crónica del Rey Enrico otavo de Ingalaterra
1874
Índex
Historia del cisma de Enrique VIII de Inglaterra
Ms Títol donat pel catalogador, tot atenent el contigut de l'explicit del f. 85v Col·lació: Paper, f. i (paper) + 110 + i (paper) ; numeració original (f. 1-82) i moderna a llapis (f. 1-110) Composició: Escrit a línia tirada a 43 línies (f. 7v) Escriptura: Humanística rodona i cursiva Decoració: Rúbriques i caplletres en color vermell i blau Enquadernació: Del segle XVIII en pergamí. Al llom: "La cisma de Inglaterra" Origen: Escrit a Espanya, probablement a la corona de Castella a començaments del segle XVII Signatura anterior: 87-6-17 Signatura actual: València, Universitat de València. Biblioteca Històrica, BH Ms. 155 A la fi de la primera obra, sota la rúbrica, es llegeix: "Melchor de Va…
Historia verdadera, y exemplar del Gran Cisma de Inglaterra, con sus factores Henrico Octavo, y Ana Bolena. Sacada de Don Fray Diego de Yepes ... el …
Data presa de Palau Sign.: [A]-B2, C[8 Reclams Grav. xil. a la port. avant del tít., representant la mort decapitada d'Anna Bolena Frisos
Losing DNA methylation at repetitive elements and breaking bad
2021
Abstract Background DNA methylation is an epigenetic chromatin mark that allows heterochromatin formation and gene silencing. It has a fundamental role in preserving genome stability (including chromosome stability) by controlling both gene expression and chromatin structure. Therefore, the onset of an incorrect pattern of DNA methylation is potentially dangerous for the cells. This is particularly important with respect to repetitive elements, which constitute the third of the human genome. Main body Repetitive sequences are involved in several cell processes, however, due to their intrinsic nature, they can be a source of genome instability. Thus, most repetitive elements are usually meth…