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OALib Journal期刊

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Discursive Textual Analysis of Brazil’s National Curricular Guidelines for Youth and Adult Education: Meanings and Senses  [PDF]
Romilda Teodora Ens, Marciele Stiegler Ribas, Elizabeth Dantas de Amorim Favoreto
Creative Education (CE) , 2016, DOI: 10.4236/ce.2016.712179
Abstract: Youth and Adult Education (EJA) faces great challenges in the beginning of the 21st century. Among its basic issues, it can be highlighted the need to specific teachers’ professional and education policies. Regarding Brazil, since 1996 its educational system is ruled by the National Education Guidelines and Framework Law (LDBN No. 9394/1996) which included Youth and Adult Education as a specific type of Basic Education. Many studies have been developed since then, debating about the appropriate adult-teacher learning approach towards students in a wide age-range, stressing their singularities in meaningful contexts. Our study aims to analyze the National Curricular Guidelines for Youth and Adult Education applying the discursive textual analysis methodology path in order to interpret and understand the meanings and senses of this type of educational phenomenon. We will also evaluate the goals of its proposal for teachers’ work outlined in the text content of this policy. The significance of our studies is to provide new understandings and contributions for further policy making that may address the peculiarities and singularities in the field of teacher education for Youth and Adult Education (EJA) target audience.
Análise de mapas de represas publicados na web usando imagens orbitais CCD/CBERS no estado de Minas Gerais
Ferreira, Elizabeth;Dantas, Antonio A. A.;
Engenharia Agrícola , 2010, DOI: 10.1590/S0100-69162010000100012
Abstract: in this work some public databases from the world wide web (web) were used to find the area of the furnas and funil dams in minas gerais state. the purpose of this work was to compare the web public databases values and the real values obtained from the ccd camera images on board cbers2 and cbers2b satellites. the furnas dam area obtained from ccd/ cbers2b images, in 2008, was 1.138 km2, but in the consulted databases this area ranged from 1.182 to 1.503 km2. the dam of the funil, built in 2003, with a water surface of 29.37 km2 and an island with 1.93 km2 area, did not appear in atlas, geominas, igam and ibge databases. the results revealed some problems in the web public databases like differences in the areas of dams and discrepancies like any non-existing border lines and sometimes extra areas. this suggested that some brazilian web databases publishers have not been so far rigorous and the databases are outdated. the ccd/cbers images that are web public databases showed to be suitable data for determining and updating the published information.
Estimativa da radia？？o solar global para a regi？o de Lavras, MG
Dantas, Antonio Augusto Aguilar;Carvalho, Luiz Gonsaga de;Ferreira, Elizabeth;
Ciência e Agrotecnologia , 2003, DOI: 10.1590/S1413-70542003000600008
Abstract: the objective of this work was the determination of the "a" and " b" constants of the angstrom linear model in order to estimate the global solar radiation in lavras, mg. the work was carried out in the climatological station of lavras (ecp/inmet/ufla), at the federal university of lavras, from december 2001 to november 2002, through insolation daily data and global solar radiation daily records. the "a" and " b" constants, that express the atmospheric transmitance, were obtained by regression analysis of those data. the obtained equation, qg/qt = 0,23 + 0,49 presented a determination coefficient of 0,89. the results are smaller than those suggested by the recomendations that uses the local latitude. according to the results, its possible to indicate the values of 0,23 and 0,49 to be used as the "a" and " b" constants on the angstrom equation to estimate the global solar radiation in lavras, mg.
Classifica？？o e tendências climáticas em Lavras, MG
Dantas, Antonio Augusto Aguilar;Carvalho, Luiz Gonsaga de;Ferreira, Elizabeth;
Ciência e Agrotecnologia , 2007, DOI: 10.1590/S1413-70542007000600039
Abstract: the purpose of this study was to evaluate the climatic data tendency in the last 14 years of monthly rainfall and temperatures in lavras region, mg state , compared to those of the historical series of 1961-1990 period. the thornthwaite's water balance method was employed for the climatological data of 1961-1990 and for the last observed data of 1991-2004. the thornthwaite's & mather′s water balance method considers the potential evapotranspiration, the rainfall, the storage of water in the ground and its subsequent use. this method also shows hidric excess and deficiency periods, then used on the thornthwaite's climatic classification method to determine the moisture and aridity index of the climate. the index resulted on the thornthwaite's climatic formula wich changed from b3 r b'3 a' to b2 r b'3 a' in the most recent reiod. the k？ppen climatic classification method, also employed in this work, showed no changes, remaining cwa for both periods.
Cadastral maps of irrigated areas by center pivots in the State of Minas Gerais, using CBERS-2B/CCD satellite imaging
Ferreira, Elizabeth;Toledo, Joice H. de;Dantas, Antonio A. A.;Pereira, Rafael M.;
Engenharia Agrícola , 2011, DOI: 10.1590/S0100-69162011000400015
Abstract: medium-resolution satellite images have been widely used for the identification and quantification of irrigated areas by center pivot. these areas, which present predominantly circular forms, can be easily identified by visual analyses of these images. in addition to identifying and quantifying areas irrigated by center pivot, other information that is associated to these areas is fundamental for producing cadastral maps. the goal of this work was to generate cadastral mapping of areas irrigated by center pivots in the state of minas gerais, brazil, with the purpose of supplying information on irrigated agriculture. using the satellite cbers2b/ccd, images were used to identify and quantify irrigated areas and then associate these areas with a database containing information about: irrigated area, perimeter, municipality, path row, basin in which the pivot is located, and the date of image acquisition.3,781 center pivots systems were identified. the smallest area irrigated was 4.6 hectares and the largest one was 192.6 hectares. the total estimated value of irrigated area was 254,875 hectares. the largest number of center pivots appeared in the municipalities of unaí and paracatu, with 495 and 459 systems, respectively. cadastral mapping is a very useful tool to assist and enhance information on irrigated agriculture in the state of minas gerais.
Identifica？？o de fragmentos de floresta nativa, por diferentes intérpretes, com a utiliza？？o de imagens landsat e cbers em lavras, MG
Ferreira, Elizabeth;Santos, Jacinto Pereira;Barreto, Ant？nio Carlos;Dantas, Antonio Augusto Aguilar;
Ciência e Agrotecnologia , 2005, DOI: 10.1590/S1413-70542005000300021
Abstract: in this work two images from landsat 7 and cbers 2 were analyzed in order to identify small areas of semideciduous forest and to evaluate the classification accuracy made by three different analysts. the study was carried out in lavras region, mg, using the spring gis with the appropriate functions to jufil the digital classification and visual inspection. the comparisons between the classifications and accuracy assessment procedures employed the overall accuracy, the user's accuracy, the producer's accuracy and the kappa coefficient. the results showed that the overall accuracy were higher than 90% and the kappa coefficient ranged from 50% to 77% when the landsat and cbers images were compared by different analysts. the fragments vegetation maps made from digital classification of cbers and landsat satellites images presented high percentage of common areas and analysts made different maps but, those one produced from cbers satellite images were better than the other classifications.
Algoritmos evolucionários na determina？？o da configura？？o de custo mínimo de sistemas de co-gera？？o de energia com base no gás natural
Goldbarg, Marco César;Goldbarg, Elizabeth Ferreira Gouvêa;Medeiros Neto, Francisco Dantas de;
Pesquisa Operacional , 2005, DOI: 10.1590/S0101-74382005000200005
Abstract: this work presents a special case of the general problem of determining the configuration of cogeneration systems in which the primary source of energy is natural gas. the objective is to determine the configuration with the minimum cost. technical, operational and economic features impose constraints to the problem making it computationally hard to solve. evolutionary algorithms based upon genetic, memetic and transgenetic algorithms are presented to solve the problem. a computational experiment with thirty-five instances generated in accordance with five distinct cogeneration cycles is reported. the results show that the transgenetic algorithm exhibits an overall best performance.
Valida？？o de metodologia analítica para determina？？o de mercúrio total em amostras de urina por espectrometria de absor？？o at？mica com gera？？o de vapor frio (CV-AAS): estudo de caso
Guilhen, Sabine Neusatz;Pires, Maria Aparecida Faustino;Dantas, Elizabeth Sonoda Keiko;Xavier, Fernanda Villibor;
Química Nova , 2010, DOI: 10.1590/S0100-40422010000600013
Abstract: mercury is a toxic metal used in a variety of substances over the course history. one of its more dubious uses is in dental amalgam restorations. it is possible to measure very small concentrations of this metal in the urine of exposed subjects by the cold vapor atomic absorption technique. the present work features the validation as an essential tool to confirm the suitability of the analytical method chosen to accomplish such determination. an initial analysis will be carried out in order to evaluate the environmental and occupational levels of exposure to mercury in 39 members of the auxiliary dental staff at public consulting rooms in the city of araguaína (to).
Dinamica do uso e cobertura da terra no campus da Universidade Federal de Lavras de 1964 a 2009
Ferreira, Elizabeth;Dantas, Antonio Augusto Aguilar;Oliveira, Alcione de;Machado, Rodrigo Villela;
CERNE , 2013, DOI: 10.1590/S0104-77602013000100005
Abstract: this study identified, quantified and analyzed changes in land use and cover on the campus of federal university of lavras campus, located in lavras city (minas gerais state). the 2009 quickbird satellite imagery and 1985, 1979, 1971, 1964 vertical aerial photographs were used to produce a set of land use and land cover maps. the work started with the orthorectification of the quickbird satellite imagery and vertical aerial photographs. the identification and definition of land cover and land use classes were obtained from field surveys in 2009. first, the land cover and land use maps were made from that information. finally, the quantification and analysis of changes were performed at the imagery time range. the results showed that in 2009 the "urbanized area class" of the campus reached 65.79 ha and that the most significant increase of this class occurred between the years 1964 (6.24 ha) and 1971 (24.4 ha). the smallest area of "forest land class" found on the campus was 38.38 ha in 1971, and from 1979 on this situation has been improved reaching 113.18 ha of "forest land class" in 2009. for the "water class" there was not any dam constructed yet in the campus before 1971. most of the campus area, previously used for "agricultural land class" had a significant reduction within this category, from 384.19 ha in 1964 to 271.16 ha in 2009.
Efeito do NaCI sobre o crecimento ea multiplica？？o in vitro de bananeira
Macêdo, Cristiane Elizabeth Costa de;Barroso, Paulo Augusto Vianna;Moura, Gioconda Emanuella Diniz de Dantas;Alloufa, Magdy Ahmed Ibrahim;
Revista Brasileira de Fruticultura , 2005, DOI: 10.1590/S0100-29452005000200003
Abstract: soil salinity is an important factor of stress that occurs in many semi-arid and arid regions of brazil where the bananeira is cultivated. the effect of different sodium chloride (nacl) concentrations, in vitro, on the growth and shoot multiplication derived from explants of "grand naine" variety was studied. the shoot-tips of the bananeira were inoculated in ms media in the absence: t0=0 (control) and in the presence of three nacl treatments: t1=50mm, t2=75mm e t3=100mm and sub cultured five times in the respective treatments. the subcultures were carried out every 30 days and the number of shoots multiplicated on each inoculated shoot, length and total number leaves of inoculated shoot and production of fresh weight were observed at 0; 30; 60; 90; 120 e 150 days after salt exposition. the results showed that the presence of nacl in the media affects the shoot's production in vitro. the increase of nacl concentration in the media is proportional to the decrease in the number of shoots produced. the multiplication of bananeira's shoot reduced about 80% in the treatment t1, while the treatments t2 and t3 achieved 90% of reduction. on the other hand the two saline treatments 75 and 100 mm interfered at the same form in the growth of shoots, production of fresh weight, length and total number of leaves. under experimental conditions the best dose among the different sodium chloride was 50 mm because this dose showed intermediary effects on the characters evaluated.
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