196,329 research outputs found

    Uma análise da didática de gasparin: possibilidade de práxis pedagógica?

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    The aim of the article is to analyze the didactic proposal of Gasparin (2013) from the work titled "A didactic for historical-critical pedagogy", embodied in the methodology proposed by Professor Dermeval Saviani, which addresses this pedagogy as being An alternative to overcoming the liberal approaches of teacher training in recent decades. The work brings the explanation of the five steps of the pedagogical method proposed by Saviani (2011), synthesized in the didactics of João Luiz Gasparin. As a central question: how to work the pedagogical praxis that promotes the integral education of the students based on the contributions of the didactics of Gasparin grounded in the principles of historical-critical pedagogy (PHC)? The methodology is part of the bibliographic research pertinent to the proposed theme and its epistemological foundations in Marx's historical-dialectical materialism, with a qualitative approach. It seeks as a goal to obtain theoretical knowledge to reach the teaching practice in a historical-critical perspective based on didactic contributions that evidence the feasibility of social transformation of professors and students. The results show that there is a possibility of applying the method that attempts to work the teaching proposal based on the historical-critical pedagogy, thus breaking with the models of liberal approaches and it was also found that through the Socialization of systate knowledge is possible to succeed in integral human formation and social transformation of students. We conclude that in the Gasparin method the teaching work is more dynamic and the dialectical process of practice-theory-practice leads the student to perceive that the contents to be studied establish a relationship with reality and with the totality of social and historical practice. El objetivo del artículo es analizar la propuesta didáctica de Gasparin (2013) a partir de la obra titulada "Una didáctica para la pedagogía histórico-crítica", plasmada en la metodología propuesta por el profesor Dermeval Saviani, que aborda esta pedagogía como Una alternativa a la superación de los enfoques liberales de la formación de profesores en las últimas décadas. La obra aporta la explicación de los cinco pasos del método pedagógico propuesto por Saviani (2011), sintetizado en la didáctica de Joao Luiz Gasparin. Como pregunta central: ¿cómo trabajar la praxis pedagógica que promueve la educación integral de los estudiantes basada en las contribuciones de la didáctica de Gasparin basadas en los principios de la pedagogía histórico-crítica (PHC)? La metodología forma parte de la investigación bibliográfica pertinente al tema propuesto y sus fundamentos epistemológicos en el materialismo histórico-dialéctico de Marx, con un enfoque cualitativo. Busca como objetivo obtener conocimientos teóricos para llegar a la práctica docente desde una perspectiva histórico-crítica basada en aportaciones didácticas que demuestren la viabilidad de la transformación social de profesores y estudiantes. Los resultados muestran que existe la posibilidad de aplicar el método que intenta trabajar la propuesta didáctica basada en la pedagogía histórico-crítica, rompiendo así con los modelos de enfoques liberales y también se encontró que a través de la La socialización del conocimiento de systate es posible tener éxito en la formación humana integral y la transformación social de los estudiantes. Concluimos que en el método Gasparin el trabajo didáctico es más dinámico y el proceso dialéctico de la práctica-teoría-práctica lleva al estudiante a percibir que los contenidos a estudiar establecen una relación con la realidad y con la totalidad de la práctica social e histórica.O objetivo do artigo é analisar a proposta didática de Gasparin (2013) a partir da obra intitulada “Uma Didática para a Pedagogia Histórico-Crítica”, consubstanciado na metodologia proposta pelo professor Dermeval Saviani, o qual aborda essa pedagogia como sendo uma alternativa para superar as abordagens liberais da formação docente nas últimas décadas. O trabalho traz a explanação dos cinco passos do método pedagógico proposto por Saviani (2011), sintetizado na didática de João Luiz Gasparin. Como questão central tem-se: como trabalhar a práxis pedagógica que promova a formação integral dos educandos partindo das contribuições da Didática de Gasparin fundamentada nos princípios da Pedagogia Histórico-Crítica (PHC)? A metodologia parte da pesquisa bibliográfica pertinente à temática proposta e seus fundamentos epistemológicos no Materialismo Histórico-Dialético de Marx, com abordagem qualitativa. Busca enquanto objetivo obter conhecimento teórico para chegar à prática docente numa perspectiva histórico-crítica a partir de aportes didáticos que evidenciam a viabilidade de transformação social dos docentes e discentes. Os resultados obtidos demonstram que há possibilidade de aplicação do método que intenta trabalhar a proposta de ensino fundamentada na pedagogia histórico-crítica, rompendo assim com os modelos de abordagens liberais e também verificou-se que através da socialização do saber sistematizado é possível ter êxito na formação humana integral e transformação social dos discentes. Concluímos que no método de Gasparin o trabalho docente é mais dinâmico e o processo dialético de prática-teoria-prática leva o educando a perceber que os conteúdos a serem estudados estabelecem relação com a realidade e com a totalidade da prática social e histórica.

    Exploratory study into the acceptance of 'on farm' automated traceability systems

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    The increasing pressure from retailers and consumers require that all farmers collect traceability data regarding the crops they produce and the name and application rate of the agrochemicals that they have used to produce them. In order to achieve this, automated traceability systems could be used to assist farmers in collecting the data required throughout the food chain to the market place. An Automated Agrochemical Traceability System (AACTS) was designed and developed at Cranfield University (Peets, 2009). This system is capable of automatically identifying and assisting in the precise weighing of the agrochemical loaded into a sprayer. The actual amount applied to crops growing in any given section of the field would then be recorded from the application maps obtained using precision farming methods. This work aims to identify the factors that inform the development of and the potential market uptake of the AACTS. Interviews with representatives of the interest groups in the food chain were conducted in order to identify their perceptions regarding traceability systems. Moreover, ten farm sprayer operators were asked to judge the sprayer with AACTS against sprayer without AACTS in terms of ease of filling, data management, investment cost, operator safety and accuracy of the data. The food industry supports the need for the AACTS and will accept the new technology if it reduces cost, time, business risk and increases value of certified produce. It was found that the weighted ranking of the sprayer with AACTS was greater than the sprayer without the AACTS at 0.68 opposed to 0.32 respectively. Peets (2009) showed that the AACTS has a resolution within 1 g with the engine switched off and 3.6 g when it is not. Furthermore, there is no significant difference in speed of operation between the AACTS and the manual method including loading and record creation time at the 5% probability level. The system would also automatically create the record of the agrochemicals used, their application rate and field distribution pattern. The price that a farmer would be willing to pay for the AACTS is positively related to the size of arable holding land, the cost of sprayer and the perception of the need towards the AACTS as found using an online questionnaire. Out of 119 respondents, 42% of the respondents perceived the need for the AACTS. This study estimated thedemand curve of the AACTS, according to this curve 4% of the farmers would buy the AACTS if it costs £3,500, 54% would buy if it cost £1,500 and 100% would buy it if it cost £200. According to the demand curve and production cost, the highest profit for the manufacturer of the AACTS could be obtained with retail price of £2,000 in Europe. Twenty seven face to face interviews were conducted with farmers in England to identified the perceived main benefits, these were; the potential improvement of stock control in the chemical store, the avoidance of use of incorrect agrochemicals, the reduction of time in the office for record keeping and improved accuracy when filling the sprayer in terms of both the correct chemical and the dilution rate. However, in order to fulfil the farmers’ requirements the AACTS should allow more rinsing space to wash out 10 and 20 litre containers. Furthermore the software and appropriate database should be programmed to enable the identification and loading of the corresponding generic agrochemical products. The existing traceability systems of three different types of farm enterprise: fresh produce, onion production and a conservation grade cereal farm were analysed and suggestions for improvements were explored. It was demonstrated that the AACTS can avoid market and financial loss for relatively small cost. The operation cost of the AACTS for an area of 900 hectares is £1.29 per hectare. Furthermore, there is a potential time and financial saving if the agrochemical application records are received electronically. However, the savings will depend on the capability of the computer and its reliability. At Clements, the production manager spends around 600 hours per year typing the agrochemical application records into the computer. A range of social science methods were used to estimate the market uptake of the AACTS. These included face-to-face semi-structured interviews with members of the food chain and farmers, the Analytical Hierarchy Process (AHP) to evaluate the prototype system of AACTS, and a Contingent Valuation (CV) questionnaire to estimate the farmers’ willingness to pay for the AACTS. The information gathered from their collective use showed that they provided a valuable suite of methods for product development

    La comtesse Agénor de Gasparin et sa famille. Correspondance et Souvenirs (1813-1894). Par Mme J.-C. Barbey-Boissier. Préface de M. Aug. Filon, 1902

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    Bourgin Georges. La comtesse Agénor de Gasparin et sa famille. Correspondance et Souvenirs (1813-1894). Par Mme J.-C. Barbey-Boissier. Préface de M. Aug. Filon, 1902. In: Revue d'histoire moderne et contemporaine, tome 4 N°7,1902. pp. 487-489

    Caractéristiques des masses d'eau, transport de masse et variabilité de la circulation océanique en mer de corail (Pacifique sud-ouest)

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    Les eaux du gyre subtropical du Pacifique sud sont majoritairement transportées vers l'ouest par le Courant Equatorial Sud (SEC) situé entre 2°S et 30°S. Se dirigeant vers l'équateur via les courants de bord ouest, les eaux de thermocline (~300 m de profondeur) ont notamment été identifiées comme contribuant à la modulation basse fréquence du phénomène climatique El Niño-Oscillation Australe (ENSO). Initialement large et zonal, le SEC se divise en plusieurs jets et courants de bord ouest à la rencontre des archipels de Fidji (18° S-180° E), du Vanuatu (16°S-168° E), de la Nouvelle Calédonie (22° S-165° E) et des côtes australiennes. Entre 10° S et 20° S, ces eaux entrent en mer de Corail sous la forme de deux jets zonaux: le Jet Nord Calédonien (18° S-16° S) et le Jet Nord Vanuatu (14° S-11° S). Dans cette thèse, nous nous sommes consacrés à documenter la circulation océanique à l'aide de données hydrologiques issues de campagnes océanographiques (1993-2010) en adoptant deux méthodes d'inversion: le " modèle inverse en boite " et l'" analyse multi-paramétrique optimale ". Nous avons ensuite abordé la variabilité interannuelle pour replacer ces analyses et déterminer les impacts sur la circulation. Dans la première partie, nous avons étudié des situations synoptiques afin de mettre en évidence le Courant Est Calédonien alimentant le Jet Nord Calédonien. Ces deux courants similaires sont fins (100 km) et profonds (0-1000 m) et transportent environ 15 Sv (1 Sverdrup = 106 m3.s-1). Plus au nord, le Jet Nord Vanuatu est plus large (~300 km) et moins profond (0-500 m); il transporte environ 20 Sv. Ces eaux se dirigent vers l'Australie où elles alimentent la mer des Salomon par l'intermédiaire du Sous-courant Côtier de Nouvelle Guinée estimé à 30 Sv. Ces analyses, au cours desquelles nous avons appliqué la méthode du modèle inverse en boite, montrent que ces structures de courants sont caractérisées par les propriétés des masses d'eau. Dans une deuxième partie, à l'aide d'une analyse multi-paramétrique optimale avec les paramètres (T, S, et O2), nous nous sommes focalisés sur les masses d'eau en établissant un lien avec la circulation dynamique. Nous avons mis en évidence le tra jet et le mélange des eaux intermédiaires et des eaux de thermocline. Dans la thermocline, l'alimentation du Sous-courant Côtier de Nouvelle Guinée est essentiellement assurée par les masses d'eau transportées par le Jet Nord Vanuatu, tandis que les eaux intermédiaires sont issues du Jet Nord Calédonien. Cette vision complémentaire de la circulation océanique alimentant la bande équatoriale montrent que les eaux intermédiaires sont principalement transportées par les courants profonds tandis que les eaux de thermocline sont issues majoritairement du Jet Nord Vanuatu. Dans une troisième partie, la variabilité de la circulation océanique est analysée sur la période 1993-2010 à l'aide d'une simulation numérique au 1/10 et d'une méthode de reconstruction de profils hydrologiques utilisant les données satellitaires. Nous montrons que la variabilité interannuelle du SEC suit de trois mois le phénomène ENSO, et qu'elle est dominée par la variabilité du Jet Nord Vanuatu. Contrôlée par les vents, la variabilité du SEC est associée à une modulation de la pente de la thermocline, qui induit une intensification de 6 ± 4 Sv suite à un évènement El Niño et un ralentissement de 4 ± 4 Sv après un évènement La Niña. Nous montrons également que la modulation de la thermocline entraîne l'apparition d'anomalies de température et de salinité, susceptibles d'être transmises vers la bande équatoriale. Ce travail de thèse a ainsi permis d'augmenter la compréhension de la circulation régionale et fournit de nouvelles pistes d'investigations pour l'étude de la dynamique de la mer de Corail.Waters from the South Equatorial Current, the northern branch of the South Pacific subtropical gyre, have been identified as having an important contribution to climate variability and El Niño-Southern Oscillation. Initially a broad westward current extending from 2°S to 30°S, the South Equatorial Current splits upon the major archipelagos of Fiji (18°S, 180°E), Vanuatu (16°S, 168°E), New Caledonia (22°S, 165°E) and Australian coasts resulting in two main zonal jets entering the Coral Sea: the North Caledonian Jet (18°S, 180°E) and the North Vanuatu Jet (16°S, 168°E). In this work, we focus on the oceanic circulation using hydrographic data from sea cruises and we apply two inverse methods: the "inverse box model" and the "optimal multi-parametric analysis". Then, we report interannunal variability and its impacts on the Coral Sea circulation. We first study the East Caledonian Current which runs along the east coast of New Caledonia and feeds the North Caledonian Jet. Both currents extend about 100 km horizontally, to at least 1000 m depth vertically and transport 15 Sv (1 Sv = 106 m3.s-1). In the northern part, the North Vanuatu Jet is larger (~300 km) and shallower (0-500 m) and transports around 20 Sv. A part of these waters reaches Australia and supplies the Solomon Sea via its western boundary current, the New Guinea Coastal Undercurrent estimated at 30 Sv. These structures are characterized by water mass properties. Secondly, we emphasize the thermocline and intermediate waters to depict water mass pathways and mixing. In the thermocline, the New Guinea Coastal Undercurrent is mainly supplied by North Vanuatu Jet waters at the thermocline level while in the intermediate level, waters come from the North Caledonian Jet. This complementary approach shows that intermediate waters are mainly carried by deep currents and subsurface waters by the North Vanuatu Jet. In the last part, interannual variability is analyzed on the 1993-2010 period with a 1/10° numerical simulation and a proxy method based on altimetric data. Interannual variability of the South Equatorial Current mass transport follows the El Niño-Southern Oscillation with a 3-months lag. The North Vanuatu Jet leads this variability. Controlled by winds, the South Equatorial Current variability is associated with thermocline depth modulation, which involves intensification after an El Niño event (6 ±4 Sv) and a decrease after La Niña (4 ±4 Sv). We also show that temperature and salinity anomalies are the result of thermocline depth modulation

    Mémoire sur le métayage / par M. A.-E.-P. de Gasparin,...

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