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Search Results: 1 - 10 of 353946 matches for " Emerson Luís; "
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Educa??o física, ciência e cultura
Velozo, Emerson Luís;
Revista Brasileira de Ciências do Esporte , 2010, DOI: 10.1590/S0101-32892010000300006
Abstract: this paper discusses some characteristics of modern science, which have influenced the academic practice in physical education and contributed that some of its sub-areas become hegemonic. this has entailed a fragmented, naturalised and universalised view of the human being and of the social reality. some tenets defended by anthropological thinking - the comprehension of reality as a cultural and symbolic dimension; the notion of total social fact and the synthetic conception of man - may contribute to unfragment, unnaturalise and un-universalise the scientific knowledge on social reality. these tenets may provide support for the comprehension of the physical education's academic tradition and its epistemological discussion
A Técnica Esportiva como Constru o Cultural: implica es para a pedagogia do esporte Sport Technique as a Cultural Construction: Implications to Sport Pedagogy La técnica deportiva como construcción cultural: implicaciones hacia la pedagogía del deporte
Jocimar Daolio,Emerson Luís Velozo
Pensar a Prática , 2008, DOI: 19806183/rpp.v11i1.1794
Abstract: O texto discute a técnica esportiva a partir de alguns referenciais das ciências sociais e humanas, fazendo um contraponto ao conceito tradicional de técnica utilizado pela área de Educa o Física e Esporte, cuja base teórica é composta primordialmente por contribui es das ciências da natureza. Considerando a técnica como o conjunto de modos de fazer e a tática como as raz es do fazer, o texto trata das implica es para a pedagogia do esporte, propondo o ensino da cultura esportiva de forma mais democrática, singular e autoral, respeitando as especificidades culturais e as constantes ressignifica es do esporte. PALAVRAS-CHAVE: esporte - cultura esportiva - pedagogia do esporte - técnica esportiva This text discusses technique in sport based on references from the social and human sciences and it questions the traditional concept of technique used in the field of physical education and sports, which is taken primarily from contributions of the natural sciences. By considering technique as a set of procedures to do something, and tactics as the reasons for doing something, the text discusses its possible implications for sport pedagogy and argues for a teaching of sport culture that is more democratic, singular, and authoral, with a respect for cultural specificities and for the constant resignifications of sports. Keywords: sport – sport culture – sport pedagogy – sport technique. El texto discute la técnica deportiva partiendo de algunos referenciales de las ciencias sociales y humanas, y hace un contrapunto al concepto tradicional de técnica utilizado por el área de Educación Física y Deporte, cuya base teórica se compone primordialmente por contribuciones de las ciencias naturales. Considerando la técnica como el conjunto de maneras de hacer, y la táctica como las razones de hacer, el texto trata de las implicaciones para la pedagogía deportiva, y propone la ense anza de la cultura deportiva de manera más democrática, singular y autoral, respetando las especificidades culturales y las constantes resignificaciones del deporte. PALABRAS-CLAVE: deporte – cultura deportiva – pedagogía del deporte – técnica deportiva.
GPR Tomographic Imaging of Concrete Tubes and Steel/Plastic Tanks Buried in IAG/USP Geophysical Test Site, Brazil  [PDF]
Jorge Luís Porsani, Emerson Rodrigo Almeida, Bruno Poluha, Vinícius Rafael Neris dos Santos
International Journal of Geosciences (IJG) , 2017, DOI: 10.4236/ijg.2017.85035
Abstract: In this paper, the Ground Penetrating Radar (GPR) method was used to characterize concrete tubes and steel/plastic tanks buried in IAG/USP test site. The microwave tomography was used to improve the GPR images, aiming to retrieve the geometry of the targets. The numerical modeling studies also were done in order to predict the GPR results of the buried targets and to give more reliability to the results interpretation. The targets were installed in the first shallow geophysical test site of the Brazil located at Institute of Astronomy, Geophysics, and Atmospheric Science (IAG) of the University of S?o Paulo (USP). GPR profiles of 200 MHz (shielded bistatic antennas) were acquired along three lines containing concrete tubes and steel/plastic tanks buried in subsoil. The concrete tubes show a hyperbolic reflector for the top, and the vertical tube also presented a reflection on its bottom. The horizontal steel tanks were characterized by a strong GPR reflection on their top. The empty plastic tank shows a strong reflector for the top with normal polarity. On the other hand, the plastic tank filled with water shows a weaker reflector for its top characterized by the inverted polarity of GPR signal when compared with empty plastic tank. The plastic tank filled with water also went characterized by the strong reflection to its bottom, being a good indicative to interpret GPR data on target in subsoil with some types of fluid inside of tank. The results of polarity difference for the top of tank can be used as guide pattern to identify buried tank empty or filled with water. The application of microwave tomography to the GPR data permitted to determine the position and get a good identification of the edges of the targets studied. The numeric modeling presented a good accordance with real data reducing the ambiguities in interpretation of results. These results can be used as a reference, and they can be extrapolated for areas where there is no subsurface information.
2D TEM Modeling for a Hydrogeological Study in the Paraná Sedimentary Basin, Brazil  [PDF]
Emerson Rodrigo Almeida, Jorge Luís Porsani, F. A. M. dos Santos, Cassiano Antonio Bortolozo
International Journal of Geosciences (IJG) , 2017, DOI: 10.4236/ijg.2017.85038
Abstract: This work uses 2D TEM (Transient Electromagnetic) modeling for a hydrogeological study in the Paraná sedimentary basin. The study area is located at the northern region of the state of S?o Paulo, Brazil, where groundwater is exploited from two aquifer systems: one sedimentary, shallow, and the other crystalline, deep. The interest in applying the TEM method in this area owes to the high exploitation rates of groundwater from the crystalline aquifer system for irrigation, which is triggering considerable seismic activity locally. This aquifer system is composed of fractured basalt within the Serra Geral Formation and is about 120 m deep. Eighty-six TEM soundings were acquired at this location, but in nine cases the data did not fit the modelled curve for 1D geoelectrical models due to the geological complexity of the area. This paper shows 2D geoelectrical modeling results based on the FDTD (Finite Differences in Time Domain) method to explain the lateral resistivity variation within the geological setting. A 2D model was generated for each sounding and compared with 1D inversion models as well as with direct information from wells. The results show some vertical variations of about 10 to 30 meters on the upper interface of the basalt layer from Serra Geral Formation. They are located at approximately 60 meters from the center of the soundings. The existence of these 2D structures in the subsurface can be related to the drainage system in the study area. The presence of these structures may indicate a connection between the shallow and deep aquifer systems, acting like a conduit that may contribute to the seismic activity reported.
Depth Estimates of Buried Utility Systems Using the GPR Method: Studies at the IAG/USP Geophysics Test Site  [PDF]
Bruno Poluha, Jorge Luís Porsani, Emerson Rodrigo Almeida, Vinicius Rafael Neris dos Santos, Scott Joseph Allen
International Journal of Geosciences (IJG) , 2017, DOI: 10.4236/ijg.2017.85040
Abstract: Identifying underground utilities and predicting their depth are fundamental when it comes to civil engineering excavations, for example, to install or repair water, sewer, gas, electric systems and others. The accidental rupture of these systems can lead to unplanned repair costs, delays in completing the service, and risk injury or death of workers. One way to detect underground utilities is using the GPR-Ground Penetrating Radar geophysical method. To estimate depth, the travel time (two-way travel time) information provided by a radargram is used in conjunction with ground wave velocity, which depends on the dielectric constant of materials, where it is usually assumed to be constant for the area under investigation. This procedure provides satisfactory results in most cases. However, wrong depth estimates can result in damage to public utilities, rupturing pipes, cutting lines and so on. These cases occur mainly in areas that have a marked variation of water content and/or soil lithology, thus greater care is required to determine the depth of the targets. The present work demonstrates how the interval velocity of Dix (1955) can be applied in radargram to estimate the depth of underground utilities compared to the conventional technique of constant velocity applied to the same data set. To accomplish this, synthetic and real GPR data were used to verify the applicability of the interval velocity technique and to determine the accuracy of the depth estimates obtained. The studies were carried out at the IAG/USP test site, a controlled environment, where metallic drums are buried in known positions and depths allowing the comparison of real to estimated depths. Numerical studies were also carried out aiming to simulate the real environment with variation of dielectric constant in depth and to validate the results with real data. The results showed that the depths of the targets were estimated more accurately by means of the interval velocity technique in contrast to the constant velocity technique, minimizing the risks of accidents during excavation.
GPR Tomography as Support for an Archaeological Excavation in Aripuan? Indigenous Cemetery, Amazon Region, Brazil  [PDF]
Jorge Luís Porsani, Renato Kipnis, Vinícius Rafael Neris dos Santos, Emerson Rodrigo Almeida, Iris Fernandes
International Journal of Geosciences (IJG) , 2017, DOI: 10.4236/ijg.2017.810073
Abstract:
We present here a series of Ground Penetrating Radar (GPR) survey carried out in different areas of the Dardanelos 1 archaeological site in order to generate information about subsurface anomalies associated with archaeological material that could be use in decision making within the environmental licensing process of the Dardanelos Hydroelectric Power Plant, located near of the Aripuan? city, Mato Grosso State, northwest region of Brazil. GPR surveys with 200 MHz antenna were carried out in two blocks aiming to locate archaeological resources and features. The analysis of GPR 2D and 3D results allowed detecting anomalous regions characterized by hyperbolic reflections, shallow elongated continuous targets with high amplitudes, as well as sub-horizontal reflectors. Microwave tomography allowed estimating the geometry of the GPR anomalies sources. Excavations were done by archaeologists at the locations where hyperbolic anomalies were found, revealing interesting structures related to urns in the middle of a rich in organic matter consisting of black and ceramic materials up to about 1 m deep. The first sub-horizontal reflector at approximately 1 m depth is related to the base of the black soil layer rich in organic matter and the second sub-horizontal reflector between 2 and 3 m deep suggests a lithological change or may be related to presence of the water table. The continuous elongated shallow targets observed in the depth slices are related to tree roots in the middle of the archaeological strata. The GPR results guided archaeological excavations, reduced the time and costs involved in research, and contributed to the preservation of Brazilian historical heritage.
Pesquisa qualitativa em Educa??o Física: possibilidades de constru??o de conhecimento a partir do referencial cultural
Silva, Cinthia Lopes da;Velozo, Emerson Luís;Rodrigues Jr, José Carlos;
Educa??o em Revista , 2008, DOI: 10.1590/S0102-46982008000200003
Abstract: this work indicates presuppositions for the qualitative research in physical education, starting with a literature review based on the cultural frame of reference. firstly, we introduce the debate concerning the natural and the human sciences and implications for the physical education; we then use a cultural axis as a ground basis for the research in the area, proposing the 'dense description' as a possibility for knowledge building; finally, we bring up examples of studies conducted with such an approach. this theoretical methodological approach allows the study of the human being as a cultural being, thus opposed to the naturalised view of a human - predominant in physical education.
A??o de herbicidas sistémicos n?o-seletivos sobre a progénie de soja quando aplicados durante a fase reprodutiva das plantas-m?e
Neves, Rodrigo;Fleck, Nilson Gilberto;Silveira, Cristiane Amaro da;Costa, Emerson Luís Nunes;
Ciência Rural , 1998, DOI: 10.1590/S0103-84781998000300003
Abstract: the purpose of ?his research was to evaluate germination of soybean seeds and initial development of seediings, whose mother plants were treated with sub-rates of svstemic nonselective herbicides during late stages of development. field, laboratory, and greenhouse experiments were carried ou? a? agronomy school of ufrgs, in porto alegre, rs, during the period 1995/97. treatments consisted offield appiications of the herbicides 2,4-d at rates of 5 and l0g/ha a. e., imazapvr at 25 and 50g/ha a.e., and sulfosate at 25 and 50g/ha a.e. the se herbicides were sprayed ei?her at beginning of flowering (r1 stage) or at beginning ofpod development (r3 stage) of soybean plants. it was proved that appiication of imazapyr on sovbean plants at beginning of pod development decreased germination of seeds formed on those plants. the appiication of 2,4-d and sulfosate did not ajfect soybean seed germination, at tested rates, independentiy if appiied ei?her at beginning of flowering or pod development of the mother plants. seediing ?zeight, dry matter of shoots, of roots and total dry matter of seediings of the progeny were not affected by herbicides appiied at ri and rs stages of sovbean plants. however, sprayings of herbicides 2,4-d (at 5 and l0g/ha a.e.), imazapyr (at 25 and 50g/ha a.e.), and sulfosate (at 25 and 50g/ha a.e.), appiied at beginning of pod development of mother plants, in general reduced hvpocotyl and root lengtli of sovbean seed-lings of tire progeny.
Influência de variáveis operacionais no desempenho de classificador aerodinamico
Tavares, Luís Marcelo Marques;Cunha, Emerson Reikdal da;Almeida, Salvador Luiz de;
Rem: Revista Escola de Minas , 2007, DOI: 10.1590/S0370-44672007000300010
Abstract: dynamic air classification occupies a central position in the grinding circuits of cement and several other industrial minerals. an important recent application of this device is in the reduction of the proportion of fine (< 75 μm) material contained in fine aggregate for construction that is produced by crushing. the present paper analyzes the influence of a number of variables on the performance of a pilot-scale sturtevant classifier, aiming at providing data for mathematical modeling. it is demonstrated that the performance of the classifier is significantly influenced by feed moisture content, rotor frequency and the position of the rejection elements, being just marginally influenced by particle shape and the feed rate, within the range of the studied conditions.
Evidências empíricas da lei de Kaldor-Verdoorn para a indústria de transforma??o do Brasil (1985-1997)
Marinho, Emerson Luís Lemos;Nogueira, Cláudio André Gondim;Rosa, Ant?nio Lisboa Teles da;
Revista Brasileira de Economia , 2002, DOI: 10.1590/S0034-71402002000300004
Abstract: in this paper, we have tried to discuss theoretically kaldor-verdoorn's law, showing its relevance to the determination of how dynamic an industry of country on region can be. furthermore, we have made an empirical test of such theoretical proposition for the brazilian industry during the period 1985 to 1997, using an error correction model (mce), whose results indicate that the brazilian industry has been reasonably dynamic, specially after the opening process of its economy had begun, in 1990, when a combination of short and long run effects made productivity grow more intensively than production.
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