721 resultados para Riduttore ordinario aeronautico elica


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En el presente trabajo intentaremos analizar cierta serie o tradición de reflexiones sobre el conocimiento científico que lo caracterizan por su discontinuidad en relación al conocimiento ordinario o sentido común. El origen de esta serie puede localizarse en la obra de Gaston Bachelard y su peculiar estudio de los actos epistemológicos con los que se rompe con el pasado en una disciplina científica. Estos actos contrastan con lo que este autor califica como el "mito continuista" del empirismo. Esta posición será apropiada por Althusser y desarrollada por sus discípulos Balibar y Pêcheux. Intentaremos mostrar que el factor común de la discontinuidad no constituye ;una posición monolítica, sino que cabe reconocer, en las posiciones que consideramos, maneras diversas de entender la naturaleza de la misma. En este sentido, la revisión de las posiciones que Althusser efectuó en su "autocrítica" constituye un punto de observación privilegiado del abanico de alternativas que algunos de sus discípulos desarrollarían sobre bases diversas

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En el presente trabajo intentaremos analizar cierta serie o tradición de reflexiones sobre el conocimiento científico que lo caracterizan por su discontinuidad en relación al conocimiento ordinario o sentido común. El origen de esta serie puede localizarse en la obra de Gaston Bachelard y su peculiar estudio de los actos epistemológicos con los que se rompe con el pasado en una disciplina científica. Estos actos contrastan con lo que este autor califica como el "mito continuista" del empirismo. Esta posición será apropiada por Althusser y desarrollada por sus discípulos Balibar y Pêcheux. Intentaremos mostrar que el factor común de la discontinuidad no constituye ;una posición monolítica, sino que cabe reconocer, en las posiciones que consideramos, maneras diversas de entender la naturaleza de la misma. En este sentido, la revisión de las posiciones que Althusser efectuó en su "autocrítica" constituye un punto de observación privilegiado del abanico de alternativas que algunos de sus discípulos desarrollarían sobre bases diversas

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Includes laws of October 1900 and December 1901 appropriating national funds to railway construction and "Ferro-carril de Guaqui á La Paz, extractos de la memoria presentada por el ministro de fomento é instrucción pública ... ante el Congreso ordinario de 1903".

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"Con una parte dedicata al diritto aeronautico," 1926-

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Apendice : Examen del escrito de los señores Allignol, hermanos, tocante al estado actual del clero en Francia.

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Mode of access: Internet.

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Pt. 2, Executive decrees, discontinued with 1928/29.

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En el presente trabajo intentaremos analizar cierta serie o tradición de reflexiones sobre el conocimiento científico que lo caracterizan por su discontinuidad en relación al conocimiento ordinario o sentido común. El origen de esta serie puede localizarse en la obra de Gaston Bachelard y su peculiar estudio de los actos epistemológicos con los que se rompe con el pasado en una disciplina científica. Estos actos contrastan con lo que este autor califica como el "mito continuista" del empirismo. Esta posición será apropiada por Althusser y desarrollada por sus discípulos Balibar y Pêcheux. Intentaremos mostrar que el factor común de la discontinuidad no constituye ;una posición monolítica, sino que cabe reconocer, en las posiciones que consideramos, maneras diversas de entender la naturaleza de la misma. En este sentido, la revisión de las posiciones que Althusser efectuó en su "autocrítica" constituye un punto de observación privilegiado del abanico de alternativas que algunos de sus discípulos desarrollarían sobre bases diversas

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Report published in the Proceedings of the National Conference on "Education in the Information Society", Plovdiv, May, 2013

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T he socio - economy of the coastal municipalities of Rio Grande do Norte semiarid coast was analyzed th r ou g h by the actors, ant hropogenic implications, fishing environment and composition of its fish fauna, as well as the trend of product ion landed by the artisanal fleet with the aim of identifying the sustainability and management. In this study, were used participatory methodologies, monthly data of rainfall between September 2001 and December 2010; landings of the artisanal fleet during January 2001 to December 2010; and socioeconomic (IBGE, 2002/2010), (IDEMA, 2011/2012), (MPA, 2010; 2012), UNDP and MS (2013). Based on these data, we performed analysis of variance were performed using the method of Analytic Hierarchy Process (HAP) and s tatistical models of multiple regression and time series. It was identified that the occupation of the coastal and marine zone through salt industry, tourism, shrimp farming, oil and gas and wind energy reconfigured the environment and attracted new actors . Rainfall influenced the catches, of which 35% occur in the rainy season, 40% in the dry season and 25% independent. Production increased 55%, in the period analyzed , being landed in 31 ports spread over 11 municipalities, cap tured in environments mangrov e/ estuarine (23%), coastal (46%) and oceanic (31%). Despite market up 41 species, were commercialized in the region production concentrated in eight, mainly landed in Macau and Caiçara North, by vessels of small and medium - sized (motorized and sailboats) . Highlights included three species ( Hirundichthys affins , Coryphaena hippurus and Opisthonema oglinum ), which together accounted for 63.3% of the whole volume. It was found that the motorized vessels tripled in number while sailboats reduced by half. Landin gs by different types of vessels tend to increase over time, while the small sailboats vessels, decrease. The introduction of more new motorized vessels and sailboats also tend to increase production. The study concluded that GDP and HDI of coastal countie s increased however inequality persisted. The potential of artisanal fishing is in the stage “ unfavorable ” of development and the trend in fish production is to grow over time and with the entry of more vessels. However, it is urgent that the state actions to promote and enhance planning to restore fish stocks in a sustainable and profitable fisheries standards. Therefore, it is recommend the strategic use of natural resources in a sustainable development perspective.

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The constant necessity for new sources of renewable energy is increasingly promoting the increase of investments in this area. Among other sources, the wind power has been becoming prominent. It is important to promote the search for the improvement of the technologies involved in the topologies of the wind turbines, seeking for alternatives which enhance the gotten performance, despite the irregularity of the wind speed. This study presents a new system for speed control, in this case applied to the wind turbines - the Electromagnetic Frequency Regulator (EFR). One of the most used devices in some topologies is the mechanical gearboxes which, along with a short service life, often represent sources of noise and defects. The EFR does not need these transmission boxes, representing a technological advancement, using for that an adapted induction machine, in which the stator becomes mobile, supportive to the axis of the turbine. In the topology used in this study, the EFR also allows us to leave out the usage of the eletronic converters to establish the coupling between the generator and the electrical grid. It also the reason why it provides the possibility of obtaining the generation in alternating current, with constant voltage and frequency, where there is no electrical grid. Responsable for the mechanical speed control of the generator, the EFR can be useful in other transmission systems in which the mechanical speed control output is the objective. In addition, the EFR operates through the combination of two inputs, a mechanical and other electrical. It multiplies the possibilities of application because it is able to synergistic coupling between different arrays of energy, and, for such reasons, it enables the various sources of energy involved to be uncoupled from the network, being the synchronous generator responsible for the system connection with the electrical grid, simplifying the control strategies on the power injected in it. Experimental and simulation results are presented through this study, about a wind turbine, validating the proposal related to the efficience in the speed control of the system for different wind conditions.