Efeitos por comparações e por experimento em interações de experimentos fatoriais

Avaliar efeitos de interações é um dos principais objetivos dos experimentos fatoriais. em experimentos com dois fatores A e B, com m e n níveis de cada fator, respectivamente, há m x n possíveis interações e (m-1)(n-1) graus de liberdade associados. Freqüentemente somente parte dessas interações contribui efetivamente para a Soma de Quadrados da Interação e pode ser interessante examiná-las. O uso de nível de significância menos rigoroso para interpretação do efeito da interação por experimento, em relação às demais fontes de variação da análise de variância, pode captar efeitos importantes. Recomenda-se o uso de p = 0,25 para a interpretação do efeito da interação por experimento, mantendo-se o usual p = 0,05 para efeitos por comparações. Mesmo no caso de interações significativas, comparações selecionadas, em lugar de apenas cortes, podem auxiliar a interpretação de interações complexas.

Escrever o movimento: o cinema itinerante como reinvenção de uma estética do viver

La tesis parte del presupuesto que el cine ofrece la imensa capacidad de entretejer de forma compleja realidad e imaginación. Con eso sugerimos que tal cual una "escuela de vida", según la definición de Edgar Morin (2003), el cine, por medio de sus producciones y exibiciones, pude ser capaz de operar un movimiento de reinvención de una estética del vivir en el espacio de lo improbable. De ahi surge la pregunta: ¿Cómo un fenómeno artístico, estético e imagético puede realizar tal movimiento? Tomando como referencia el guión de vida del personaje de la vida real José Isaias de Lucena Filho, más conocido por Zezeco, encontramos pistas de esa reinvención. Residente de una pequeña ciudad del interior de la província de Rio Grande do Norte, llamada Ouro Branco, en la década del 1960, se desplazó hacia el centro-sur de Brasil y retornó a su lugar de partida con la idea de trabajar proyectando peliculas. De manera singular y plural, este sujeto asumió el riesgo y la incertidumbre de enfrentar determinismos sociales, climáticos y culturales para proponer nuevas simbolizaciones por medio del cine itinerante. La presencia del séptimo arte en pequeñas ciudades de hábitos rurales marcadas por la miséria, el hambre, la negligéncia, el coronelismo político y los problemas climáticos, alteró escenários, actualizó mitos y proporcionó nuevas interacciones entre los sujetos. Zezeco entró en las cifras del éxodo rural y emigró hacia Rio de Janeiro, pero su éxodo fue cinematográfico, porque le sirvió como base para la inserción de efectos especiales fantásticos y poéticos en guiones de vidas inmersas en lo trivial y lo contingente. Tal cual un cinematógrafo vivo, capturó el escenário cultural efervescente de Rio de Janeiro y lo proyectó en la pequeña ciudad de Ouro Branco y en otras ciudades del interior de las províncias de Rio Grande do Norte y Paraiba. Con ello le atribuyó un nuevo uso a la vida de su lugar de partida y de retorno. Actuó en la ambiguedad, la ambivalencia y la complejidad entre el sapiens e el demens; real e imaginario; prosa y poesia de la vida; razón y pasión; racional y simbólico; lógico y mítico. El alcance de la investigación contempla entrevistas, memória, registros manuscritos y fotografías de colección particular de habitantes de la ciudad de Ouro Branco-RN. Como referenciales teóricos principales, tenemos las obras de Edgar Morin sobre el cine y de otros autores como Giorgio Agamben y Maria da Conceição de Almeida que expanden la comprensión sobre el entreejido de realidad e imaginación, vida e ideas

Uso da biodiversidade por populações humanas na caatinga e na Mata Atlântica, Rio Grande do Norte, Nordeste do Brasil

The use of animals is a common activity but it can be really variable between human populations. This work analyzed the knowledge about useful animal species between human communities in Caatinga and Atlantic Forest considering the influence of socioeconomics and environmental factors on the species selection. Forty people were interviewed in Caraúbas community (Atlantic Forest) and thirty were interviewed in Barrocas community (Caatinga). A total of 193 animals were cited. The communities showed a low degree of similarity (20%) and the general diversity of mentioned species was significantly bigger in Caraúbas. Men cited a diversity of species greater than women for food category in Caraúbas and pet category in Caraúbas and Barrocas. Women cited greater species diversity for medicinal use in Caraúbas. In general, in both communities, the age group >60 years showed a greater knowledge than the others. The multiple regression analysis showed the age as the only socioeconomic factor which influenced significantly the knowledge about animals for the food category in both communities. Considering the richness of known species, there were differences only between gender for sum of uses and food category in Caraúbas and for the pet category in Barrocas with men showing a greater knowledge than women. The results showed that local environmental differences are fundamental at the species selection but they also showed that within communities there are other factors like gender and age that tend to influence the knowledge about species. It is important to consider cultural, economic, social and environmental factors to understand better the interactions between people and animals so that this information can be used to facilitate the implementation of conservation measures

A perda de grupos funcionais em comunidades virtuais: efeito das interações entre espécies e grupos funcionais

High levels of local, regional, and global extinctions has progressively simplified communities in terms of both species and ecosystem functioning. Theoretical models demonstrated that the degree of functional redundancy determines the rates of functional group loss in response to species extinctions. Here, we improve the theoretical predictions by incorporating in the model interactions between species and between functional groups. In this study, we tested the effect of different scenarios of interspecific interactions and effects between functional groups on the resistance to loss of community functional groups. Virtual communities have been built with different distribution patterns of species in functional groups, both with high and low evenness. A matrix A was created to represent the net effect of interspecific interactions among all species, representing nesting patterns, modularity, sensitive species, and dominant species. Moreover, a second matrix B was created to represent the interactions between functional groups, also exhibiting different patterns. The extinction probability of each species was calculated based on community species richness and by the intensity of the interspecific interactions that act upon it and group to which it belongs. In the model, successive extinctions decrease the community species richness, the degree of functional redundancy and, consequently, the number of functional groups that remain in the system. For each scenario of functional redundancy, A, and B, we ran 1000 simulations to generate an average functional extinction curve. Different model assumptions were able to generate remarkable variation on functional extinction curves. More extreme variations occurred when the matrix A and B caused a higher heterogeneity in the species extinction probability. Scenarios with sensitive species, positive or negative, showed a greater variation than the scenarios with dominant species. Nested interactions showed greater variation than scenarios where the interactions were in modules. Communities with maximal functional evenness can only be destabilized by the interactions between species and functional groups. In contrast, communities with low functional evenness can have its resistance either increased or decreased by the interactions. The concentration of positive interactions in low redundancy groups or negative interactions in high redundancy groups was able to decrease the functional extinction rates. In contrast, the concentration of negative interactions in low redundancy groups or positive interactions in high redundancy groups was able to increase the functional extinction rates. This model shows results that are relevant for species priorization in ecosystem conservation and restoration

O papel de interações positivas entre plantas na regeneração de áreas degradadas na caatinga

Conselho Nacional de Desenvolvimento Científico e Tecnológico

Natal como destino turístico : um estudo das imagens (re)veladas pela mídia, pelos turistas e suas implicações educacionais e culturais

This thesis is a result of a research on Natal/RN as a tourist destination. We understand that cities are chosen as tourist destinations beyond its cartographic localization, from other dimensions of meanings that, in its set, constitute images. These images are, probably, very different of the images constructed by native and resident populations, who possess relations of identity with the place. The knowledge of the meanings that others attribute to this city as tourist destination, bring us near to the symbolic bonds established by individuals or social groups on the act of their choices, as well as bring us near to the interaction process city-tourists where the expectations are confirmed or not. The images divulgated by the media also participate of the complex formation of the tourist image that is being constructed and available for the different public, in different social contexts. The tourism constitutes a symbolic asset of the modern society, being considered by the studious, as one of the most expressive phenomena of the modernity, for involving each year displacement and the interaction of thousand of people of different cultures in the entire world. All this people s mobilization points to practical social related to personal motivations, to the entailed desired to the idea to travel and to exceed borders. It is already consensus that tourism is a phenomenon of economic growth, generating jobs, income, professional, qualification, bringing improvements for the host cities. Since 1995, in Brazil, the tourism as a sector of the economy, passed to be considered one of the national priorities, and in this perspective, the national politics of the tourism invested in infrastructure of Brazilian cities with high tourist potential, objecting to increase the flows of Brazilian and foreign tourists. Owing to this fact, the country still invests in programs of tourist marketing, mainly divulging the images of the natural beauties of Brazil abroad. And for Brazilians, the campaigns appeal to rescue the feeling to be Brazilian, associating the idea to travel and know its country. Natal city possesses an excellent positioning in the tourist marketing, being predominantly divulgated in national and international level, for its naturalistic singularity, where the images of its natural enchantments as warm water beaches, white dunes, warm weather, constant breeze and an always blue sky are shown as the favorite scene on this city. From what was viewed above that the choice of a tourist destination articulates from a determined imaginary of a place, already constructed or in process of construction, we consider the knowledge of this imaginary a basic learning for the population of the city and especially, for educators, in the formation of professionals in this area and for tourism managers, elaborators of public politics. Based on this estimative, we developed this research that had as a general objective to identify the images that illustrate Natal city as a tourist destination - our objective of study, particularly the meanings and senses attributed by the tourist marketing (hotel s folders) and by the tourists that visited the city during this study. The discussions and reflections that had guided this research had been given from the theoretical link between imaginary and social representation, also considering some interfaces between the fields of communication and symbol. From the studied authors, Baczko (1985) clarifies that the study of social imaginary is directed for the mechanisms and structures of the social life, especially for the intervention accomplishes and efficient of the representations and symbols in the practical collectives, as well as in its direction and orientation . Following this same thought, Moscovici (1978) says that the social representation are produced in communicational and symbolic contexts, and these representations once that already constituted circulate socially as almost tangible entities. Based on this fundament and on the analyze of Barthes (1990), particularly in the approach given to the reading of photographic image, we could observe on hotel s folders that each page evidences senses and meanings of functionality of internal and external spaces, pointing to the way of leisure offered by the keepers of city which is the hotels. About, the leisure that they offer, it is directed to young public, giving meaning to the young myth of personalized leisure tourism on children, young and adults images. The image about security that hotels offer and the singular image of Natal city as a paradise place, provide an idealization of pleasure through the sun, dunes, and beaches and also due to the hospitability of the natives who are assigned as educated . For the tourist that participated on this research, Natal city is tied only by the imaginary of leisure and nature which constitute the emotional link of the relation media-city-tourist. And with such force and fullness of directions the city discloses without tensions and contradictions as a place protected by a mythical and sacred aura. The study also demonstrates us that the potiguar culture remains (almost) forgotten, due to the silenced in this imaginary. In this perspective, we highlight that this culture silence is very close related to the disvalue of education in its general meaning. We defend that the imaginary apprehended constitutes a new reading and a new looking and understanding the tourist reality that comes historically consolidating in this city. In this direction, we glimpse that this study and its future dismemberments can collaborate with the process of rescue the cultural values of the potiguar people, in the way that the meaning of tourist may be redefined, and the tourist image of the city can be also disclosed for its identities particularities of its culture

Integração de práticas culturais e redução da dose do bentazon na cultura da soja: I - efeitos sobre o crescimento da cultura

O trabalho foi desenvolvido no município de Jaboticabal, SP, no ano agrícola de 1990/91, onde testou-se a integração de práticas culturais e menor dose de herbicida aplicado em pósemergência na cultura da soja, cultivar Paraná. O delineamento experimental utilizado foi o de blocos ao acaso, com dezesseis tratamentos e quatro repetições, no esquema fatorial 4x2x2, sendo quatro tipos de manejos de plantas daninhas: testemunha infestada, 50% da dose recomendada (360 g ia/ha) do herbicida bentazon, dose recomendada do herbicida bentazon (720 g ia/ha) e testemunha capinada; dois espaçamentos entre-linhas: 30 cm e 60 cm; e duas densidades: normal e reduzida (média de 20 e 10 plantas por metro, respectivamente). Observou-se que a quantidade de matéria seca das plantas daninhas por época da colheita da soja, foi significativamente maior nos tratamentos com espaçamento maior e densidade reduzida. O arranjo proporcionado pela densidade normal (média de 20 plantas /m) e menor espaçamento (30 cm) entre-linhas, proporcionou sombreamento mais precoce do solo e foi a melhor opção de controle cultural das plantas daninhas em todos os tratamentos testados. Não foi observado sintomas de intoxicação e nem efeitos negativos sobre a nodulação das plantas de soja, por parte do herbicida aplicado, em ambas as doses testadas.

Integração de práticas culturais e redução da dose de bentazon na cultura da soja

O trabalho foi desenvolvido no município de Jaboticabal, SP, no ano agrícola de 1990/91, onde testou-se a integração de práticas culturais e menor dosagem de herbicida aplicado em pós-emergência na cultura da soja, cultivar Paraná. O delineamento experimental utilizado foi o de blocos ao acaso, com dezesseis tratamentos e quatro repetições, sendo quatro tipos de manejos de plantas daninhas: testemunha infestada, 50% da dose recomendada (360 g/ha do herbicida bentazon, dose recomendada do herbicida bentazon (720 g/ha) e testemunha capinada; dois espaçamentos entre-linhas: 30 cm e 60 cm; e duas densidades: normal e reduzida (em torno de 20 e 10 plantas por metro linear, respectivamente). Observou-se que a quantidade de matéria seca das plantas daninhas por época da colheita da soja, foi ligeiramente maior no tratamento com 50% do que no tratamento com 100% da dose do herbicida, porém a diferença não foi significativa. A produtividade no tratamento com 50% de redução na dose do herbicida foi 8,7% menor do que no tratamento com 100%. A redução de 50% na dose do herbicida testado, quando se interagiu com espaçamento e densidades adequadas (30 cm entre-linhas e densidade normal), é possível, considerando-se aceitável as perdas menores que 10% de grãos de soja em relação ao tratamento com dose normal e levando-se em conta os benefícios de tal redução da dose do herbicida.

O papel das interações no processo de inclusão de crianças com síndrome de Down

La inclusión actual está siendo orientada por diversos principios, tales como la cooperación, aceptación de las diferencias individuales, valoración de cada individuo y convivencia dentro de la diversidad. En esta perspectiva, se entiende la educación como un proceso, en que todos los alumnos con necesidades educativas especiales tienen el derecho de escolarización en el salón de clase general, visando el desarrollo máximo de su potencial. Es en la interacción con los otros que los niños desarrollan efectivamente sus capacidades, aprenden a descubrir al otro como portador de valores y, como consecuencia de esa relación, a tener más confianza en sí mismo. Es por lo tanto necesario que las influencias educativas sean recíprocas y que en la convivencia escolar, puedan ser constantes las relaciones interpersonales. Así, haciendo con que cada niño sea introducido a la vivencia de la ciudadanía, al aprendizaje que va más allá de los contenidos escolares y envolviendo también la construcción de valores, hábitos y actitudes. Con base en estos aspectos, nuestro trabajo tuvo como objetivo la interacción entre niños con síndrome de Down y sus compañeros, en dos clases regulares de una escuela pública em el nível de educación infantil, en la ciudad de Natal/RN. En este sentido, realizamos un estudio de caso con dos niños, envolviendo observación, aplicación de entrevistas y cuestionarios, además de la utilización de la sociometría. Los datos analizados apuntan la existencia de un espíritu de cooperación entre los niños, del respeto a la diversidad y también a sus limitaciones. Estos son valores que están siendo construidos y que son percibidos claramente en lo cotidiano de la escuela. De igual modo, de esta convivência resulta la construcción de vínculos afectivos y sociales entre los niños que presentan el síndrome de Down y sus compañeros, siendo estos similares a los desarrollados entre los niños en general. Sin embargo, se evidencia todavía, la necesidad de un incentivo mayor por parte de la comunidad escolar para que sean establecidos vínculos más significativos

Educação - Corporeidade - Lazer: saber da experiência cultural em prelúdio

In the passage of life, the labyrinth of songs and corners are propitious ways for a better comprehension, perception and incorporation of learnings that emerge from our subjectiveness in a magic caught by senses. Eyesight, taste, hearing, touch and smell in communication with the world, put us in front of cultural diversities. The ludicity accumulated by experiences promote the flow of hilarious and concrete discoveries that express themselves in work and leisure demonstrations. Such reflections emerge indicators to the problematic construction centralized in the incorporation of cultural experience knowledge to the formation process and professional interventions in this rule and area. From this significant problematic, aiming to deepen studies, we favored leisure as field of investigative production in full expansion. This, for sure, was an exercise of qualification that guided us through meander of education and made us dip into studies about the corporeity. A research in which the scenery was painted and constructed with the complicity of the culture lived with shine, colors, rhythm and drummings of one of the most present cultural cycles: carnival. Recognized as a stimulant for beauty, participation, socialization, and helped us to enter in the essence of gestures and expressions of corporeity, to think, elaborate and socialize a critic-scientific knowledge which, appropriating from the rhythm of colors, of sounds, of tonalities, of senses and of meanings impregnated in the web of life. All these things seduced the researcher, making imagination flow amid ludic-creative dialogues with the imaginary of researchers creation and production in the rule and area of leisure, education and corporeity. Option that made us outline as objective to investigate and interpret how leisure teachers-researchers, from their studies, researches and interventions, locate and incorporate the knowledge from cultural experience to the formation process and intervention of professionals in this rule and in this area, emphasizing the contributions from this knowledge to fence and qualify this praxis. So, as living each cultural scenery, each epistemological contribution was feeding the production with images of the different versions of the Brazilian breedings, creating and raising expectations and new discoveries and newcomers. With the seriousness of a scientific study, we lived an xxiii academic experience with complex intensity, rigor and coherence, eliminating, step by step, the risks and limitations always present in a work of this magnitude. However, we weren t, even for one moment, alone. Our epistemic regard always maintained mediated by the principles of a methodological approach - the Etnomethodology, that while central guide provided us clues to unveil the lived world by our people-playful , in a universe of 15 members, that allowed themselves to comprehend, comment, analyze. This way, grasping the object in interactions arised and provoked by narrative interview, it was systematically dialected by (re) interpretation of images and formulations of people-playful, enriched by their beliefs, myths, conceptions and rituals inherent to knowledge from cultural experience, which each one attuned with Brazilian and international history, in a mixture of senses echoed from songs and tales. Inspired in drummings and percussions, clothing and choreographies of gestures and expressions, in mixtures produced in unit interactions in the multiplicity shown as necessary requests to the totality of life, with ludicity the rescue of the past, the conquest of present and the construction of future was the axle guide. This rich process of scientific creation made us realize that is possible qualify and empower the praxis in the rule and area of leisure incorporating the knowledge from cultural experience. What also becomes possible is the recuperation of objective revolutionaries and changing conditions of praxis itself with the view of strengthening and triggerment of vital elements in the rule and area of leisure. We also reaffirm that from this praxis emerge elements necessary to human formation in plenitude, by the appropriation of knowledge that guide the facing of challenges of a complex and plural world that valorize education, corporeity and leisure

O livro de leitura da campanha de pé no chão também se aprende a ler/RN: um estudo dos pressupostos histórico-culturais

This work is about the historical and cultural assumptions inserted in the contents of literacy of the Campanha de Pé no Chão Também se Aprende a Ler, a movement of culture and popular education, developed in the State of Rio Grande do Norte in the period between 1961 and 1964. The hypothesis is the one of the existence of a romantic-political ideology which permeated a national developmentalist conception sited in its didactic-pedagogic instrument of literacy, the Book of Lecture of De Pé no Chão Também se Aprende a Ler/RN (1963). It has the aim to understand how the popular critical consciousness marked by conceptions of culture and popular education in its social, cultural and ideological relations, happened. Analyses the object of study by the symbolical cartography, methodological procedures which have as principles to retire from an antecedent source implicit meanings that can discover new realities, articulating the keywords of that document to the ideology that surrounded the Campanha de Pé no Chão Também se Aprende a Ler /RN. As results, the research showed that, considering the historical-cultural assumptions of the national developmentalist thought sited in the studied Book of Lecture, the conditions of the political-cultural context and of the advance of the Brazilian national industry on the beginning of the 1960th , admitted a process of social integration lavished by the popular literacy on the Campanha de Pé no Chão/RN, linked with the possibility of transition of the popular conscience, in a romantic-political perspective of the culture and the popular education

Interações comunicativas entre uma professora e um aluno com transtorno invasivo do desenvolvimento na escola regular

Inclusion of students with autism in regular education settings is a topic that has not been much explored by the national scientific literature. This matter is complex and, due to the extent of various aspects involved, it is essential to delimitate a focus of investigation. The direction taken by this study was to evaluate the effects of an intervention program in the communicative interactions between a student with autism and his teacher in a regular classroom. Data were collected in an elementary private school, located in the city of Natal, Rio Grande do Norte during the 2010 academic school year. The study included a teacher and a non-vocal, 10-year-old student diagnosed with autism. A quasi-experimental A-B research design was employed. During the intervention program the teacher was trained to use Naturalistic Teaching Strategies and Alternative and Augmentative Communication (AAC) resources to increase the frequency of interactions with the student during three classroom routines (entry time, snack and pedagogical activity). The results indicated qualitative and quantitative changes in the interactions of the dyad after the implementation of the intervention program. The student began to use pictograms to communicate with the teacher in two of the three routines investigated. The frequency of AAC use was also observed in the teacher‟s repertoire, especially when the student failed to understand gestures and words. The teacher positively evaluated the intervention program

O estágio supervisionado como contexto de formação docente específica para educação infantil: o que dizem os formandos sobre suas aprendizagens?

Kindergarten teachers training gains the spotlight with the passing of Law number 9.394/96 (Guidelines and Basis Law) that defines this segment as the initial step of basic education, with pedagogical function. In this spectrum, the discussion about teacher training unravels to ensure social quality to education as well as the teacher s specificities towards child singularities. Adding to that, the growing propagation of Pedagogy in an undergraduate level, given that such course has been continually transformed by the National Curriculum Guidelines for Pedagogy (2006), highlighting the addition of curriculum components that are specific to upbringing. The complex debate circa kindergarten teachers training has advancements and hardships that need to be unveiled in order to improve both formation and social quality of education in the 0- 5 years old range. This investigation inserts itself in said context and aims to analyze which knowledge, specific to kindergarten teaching are constructed, according to undergraduate trainees, in Pedagogy s supervised internship. The study was conducted alongside the discipline: Supervised Internship in Child Education ministered by the Advanced Campus of Rio Grande do Norte s State University s in the municipality of Patu-RN (CAP-UERN-Patu) and was conducted through 2012 by accompanying four undergraduate interns. We first assumed that the development of teaching knowledge is a complex process of appropriation of cultural-social practices and is symbolically mediated by interactions that occur in the formation context, and the supervised internship can be understood as a space for the articulation and enlargement of theoretical and practical knowledge, directly related to the specificities of child education. The theoretical-methodological foundation was based upon the historiccultural approach of L. S. Vygotsky and M. Bakhtin s dialogism on human sciences research, as well as his postulates on learning and developmental processes, conceived as both essentially social and discursive. The investigation approached the principles of the qualitative perspective and to the construction and analysis of data, involved documental analysis and, specially, semi-structured interviews, both individual and collective, whose fundamental premise was the production-comprehension of meanings in a dialogical perspective. The participants texts/speeches produced a synthesis that points to the occurrence, within the supervised internship at CAP/UERN, of internalization/appropriation processes and, as such, of formulation of meanings that are pertinent to child education: child, childhood, kindergarten and teacher signification and this stage s specific teaching knowledge. It stood out that the internship, alongside other curriculum components, is, in fact, one of the primeval formation environment for the teachers, in which the interns interact with their colleagues, supervisor professor, collaborator professor, and of course, the children to construct their erudition. Such interactions allow the undergraduate interns to develop attitudes and procedures to reflect on what they know, what they ve done and what they can achieve. We have concluded that the undergraduate internship can constitute itself as an articulatorconsolidator environment in the future teacher s formation process and, since well oriented, can provide the effective initiation, not only to the practice, but to the praxis as a movement of non dissociability between theory and practice

A dimensão social do desenho: um estudo sobre as interações no processo de (re) construção imagética da criança no Ensino Fundamental

In the historical-cultural perspective, the drawing is processed by means of a shared and complex way, under diverse relations with the other and with the immersed signs of the culture. That is, something constituted by the social interactions and that can modify the structure of the psychological functions, therefore as socialized sign, propitiates the incorporation of the functions socially. In this way, the figuration carrier sensitive and established meanings historically disclosing the shared experiences and the ways of the subject to think and perceive the world. Such reflections gave shape to the main problem of this research: how to think over about the drawing at the school to incide in the reconstruction of the childs imaginative language? Under such perspective, this work deals with the interactions in the production process of the drawing of the children in a context of teach-Iearning of the elementary school having as goal to analyze the interactions established in the cIassroom in the process of production of the drawings; to propose situations of learnings that favor the advance graphical expression of the students; and to identify in the interactive games some relations between body expression and drawing. For its accomplishment, it was opted for the construction process based in the collaborative investigation by the fact to propitiate negotiations, sharing and confrontation of ideas, becoming possible a joint construction of the knowledge. For this research, the researcher and the collaborating teacher, as well as the involved children, become themselves into co-authors of the context studied. As locus of the research, it was chosen a first cycle class, with 30 students, from Municipal School Profª. Emília Ramos (Natal/RN - Brazil), whose election took in account the fact of this school to constitute in a promotional space of reflections and professional development of teachers in service and, at the same time, for presentinglimitations theoretic- methodological in the field of teaching for Arts. In the process of the research, it was perceived that the children with the support of the verbal language formulates meanings on the seen and imagined object, printing lines and forms that if overlap to the physiological aspects of the visual perception. That is, the drawing discloses a reality appraised, enriched for the picked up vision of the image, but the meanings established for the author, or observer who becomes it perceivable and identified. In the systemizing situations, it was observed that the teaching-Iearning process of the drawing, implies a co-construction between teachers and learners. And, moreover, the necessity to interlace emotion and cognition by means of plastic-corporal interactions that foment drawing experiences, whose process concurs for the imagenative reconstruct of the apprentices

Decomposição e liberação de nitrogênio de resíduos culturais de plantas de cobertura em um solo de cerrado

A produção de massa seca, a taxa de decomposição e a liberação de nitrogênio (N) foram avaliadas em um experimento com sete tipos de cobertura vegetal: milheto pérola (Pennisetum americanum sin. tiphoydes), braquiária (Brachiaria brizantha), sorgo forrageiro (Sorghum bicolor L. Moench), guandu (Cajanus cajan (L.) Millsp), crotalária juncea (Crotalarea juncea) e aveia-preta (Avena strigosa Schreb), em pousio e em área de cultivo convencional (testemunha), em solo de cerrado, em Uberaba, região do Triângulo Mineiro. Dentre as coberturas avaliadas, o milheto e a crotalária foram as que apresentaram a maior produção de massa seca, maior acúmulo e a maior liberação de N. A braquiária foi a cobertura que apresentou a maior taxa de decomposição. Todas as coberturas apresentaram a maior taxa de liberação de N até 42 dias após dessecação.