Desenvolviment(ism)o, descolonialidade e a geo-história da administração no Brasil: a atuação da CEPAL e do ISEB como instituições de ensino e pesquisa em nível de pós-graduação

O objetivo desta tese é investigar a atuação da Comissão Econômica para a América Latina (CEPAL) e do Instituto Superior de Estudos Brasileiros (ISEB) na história da educação em administração no Brasil. Esta tese partiu de uma metodologia historiográfica consolidada na área, mas utilizou a abordagem descolonial para problematizar o termo história e, assim, propor uma nova agenda de pesquisa. A importação de temas de pesquisa historiográfica como americanização e Guerra Fria provoca um mimetismo de agendas de investigação e termina por subalternizar outros eventos locais que contribuíram para a historiografia da administração. A investigação geo-histórica desta tese é feita a partir da interação entre dois conceitos de desenvolviment(ism)o – o que emerge a partir da realidade da América Latina e o que é recebido de fora via americanização – que ora se aproximam, ora se afastam, e que estão inseridos na long durée da modernidade/colonialidade da América Latina. A busca pela ciência da administração se iniciou, no Brasil, vinculada ao processo de modernização e desenvolvimento do país, que levou à criação, durante a década de 1950, das primeiras escolas de ensino de graduação em administração e dos cursos objetos desta tese, que formaram 1.316 profissionais em nível de pós-graduação. Neste período deve ser minimizado o papel da americanização e relativizada a atuação destas escolas de ensino de graduação na geo-história da administração. Devemos, portanto, descolonizar a atuação da CEPAL e do ISEB como instituições de ensino e pesquisa para trazer à tona conhecimentos da tradição do pensamento social crítico latino-americano que foram subalternizados na literatura de administração, para que possam informar a área no Brasil e no exterior. Este é um caminho para descolonizar a agenda de pesquisa historiográfica e escapar da tendência de reproduzir acriticamente conhecimento recebido do exterior.

História em catálogos: um estudo da política editorial Zahar de 2001 a 2014

O presente trabalho versa sobre as políticas editoriais da Jorge Zahar Editor, em especial de 2001 a 2014, discutindo os desafios enfrentados por uma editora que construiu sua marca através do ideal de publicar livros que se mantivessem no mercado editorial ao longo do tempo. Foi apresentado um histórico da editora, desde sua fundação, como Zahar Editores, nos anos 1950, descrevendo as propostas editoriais situadas em conjunturas sociais e mercadológicas específicas. Detectaram-se alguns momentos críticos, em que tanto as políticas editoriais quanto a estrutura de gestão da empresa foram reavaliados, redimensionados e sofreram mudanças importantes. Analisaram-se diferentes catálogos da Zahar: o de 1985, período em que a editora passou a ser gerida por Jorge Zahar e filhos, e os de 2001 a 2014, observando o que neles permaneceu dos anos 1980 e também as transformações e permanências do fundo editorial entre os anos 2001 e 2014. As categorias “independência” e “livros clássicos” foram identificadas como elementos discursivos estratégicos na auto-concepção e identificação pública da editora, apontando sua percepção dos livros como bens culturais, bem como da função do editor como agente cultural. A performance da Zahar tem desafiado dois tipos de diagnósticos difundidos no senso comum e mesmo na literatura acadêmica. O primeiro é que as editoras precisam publicar livros que alcançam alta vendagem rapidamente, mesmo que eles tenham uma sobrevivência efêmera, como forma de garantir sua lucratividade e sobrevivência no mercado. O segundo é que as editoras, em geral, pequenas e médias, ainda autônomas, tendem a precisar vender seus direitos para empresas maiores e mais capitalizadas, pois não terão como enfrentar as políticas mercadológicas agressivas dessas organizações. As conclusões da pesquisa sugerem que a Zahar tem insistido na manutenção de sua auto-identificação como editora de clássicos, direcionando suas políticas editoriais para a publicação de livros que tenham longa duração, demonstrando que é possível seguir um caminho próprio, em termos de exercício da função própria do editor, marcada pela independência na escolha do que, como, quando e quanto publicar – e conservar seu espaço no mercado.

O ensino da história e o pensamento reflexivo-crítico da professora no 3º ano do Ensino Fundamental

This collaborative research is a qualitative approach, from historical and cultural perspective, made about a teacher of third grade of basic education in the area of history, in the municipality of Caicó / RN. It has as objective to investigate, in a collaborative action, if the design process of teaching and learning the discipline of history based on the relationship before / after allows the development of critical reflective thinking of the teacher in school practices. The theoretical and methodological approaches are supported in the postulates of Vygotsky (1998), Rubinstein (1973) and Linblinskaia (1979), among others, whose understanding has led us to reflect if the teacher develops the reflective critical-thinking in history discipline classes. The complexity of the study led us to an analysis exercise, using different methodological procedures, such as: bibliographic review of the literature, considering also the literature of the history area, interviews, observation in the classroom, video recordings and reflective sessions, enabling clarify the construction and reconstruction of thought that the teacher had been developing during the process of teaching and learning. The test results point to a dichotomy between theory and practice, and also to a certain fragility in the position of professor in teaching and learning the discipline of history, at the third grade of basic education. The teacher recognizes that she requires a theoretical deepening with more intensity, as a process of continuous training to improve the practice of teaching in history school, though, stating in her speech that her teaching practice is based on critical reflection. However, she presents serious limitations in classroom practices. We conclude that, although she has shown willing to work on a critical perspective of reality, showed also poor change at school practices, starting to reflect about her own actions, pointing her limits and the changes needed that didn t become reality yet. It s necessary a formative process for her. The study therefore showed that even with the sessions and reflective of deepening theoretical studies, the teacher does not change its profile, while maintaining its traditional vision in any pedagogical action. This research recommends the formation of school groups for further studies and discussion on the practices of education in history area from a reflective-critical thought perspective as a mean of personal and professional development

Anayde Beiriz e a escrita de si: (Educação, história e relações de gênero)

Le thème de cette dissertation est l Histoire de l éducation de la femme. Une analyse des pratiques culturelles de la professeur Anayde da Costa Beiriz (1905-1930), dans le contexte paraibanais du début du XXe siècle, est proposée. Le référentiel théoricométhodologique de l Histoire Culturelle est utilisé, pour aller contre l histoire passée sous silence dans le canon traditionnel. Basée sur le concept de représentation (Chartier, 1990), rompant avec les anciennes idées de sens intrinsèque, absolu, unique, liée aux pratiques complexes, multiples et différenciées, qui construisent le monde comme représentation. Basée aussi sur le concept de configuration (Elias, 1980), en comprenant que apparemment individu et société sont deux objets qui existent indépendamment, mais en vérité, se rapportent à deux niveaux inséparables du monde social, sont unis par des liens d interdépendance. Un dialogue est recherché entre le passé et le présent et les différentes dimensions: historique, sociale, politique et culturelle vécues par la professeur Anayde Beiriz. Pour obtenir des informations sur ses pratiques culturelles, une recherche des marques de cette histoire dans de multiples sources est effectuée: dans la bibliographie disponible parmi les domaines de la littérature, de l histoire, dês sciences sociales et de l éducation; dans des archives de l Institut Historique et Géographique de la Paraiba et de Natal; dans les Bibliothèques de l Université Fédérale de la Paraiba et du Rio Grande do Norte et chez des bouquinistes. L inventaire comprend: des périodiques, la législation en vigueur, des écrits de contemporains, dês témoignages oraux de parents, des lettres et des photos. On comprend de cette façon, que l idée d éplucher au travers de cette étude, des aspects qui n ont pas encore été vus et rappelés, peut non seulement répondre à nos doutes, mais, peut à partir de la réflexion qui se fait, se traduire par une nouvelle compréhension de cette histoire. En conclusion, des significations multiples sont contenues dans le processus d insertion de la femme dans l éducation à partir des Écoles Normales, qui englobent les relations de genre, l histoire du pouvoir, de la morale, de surpassement, des luttes et insatisfactions. On perçoit l héritage de résistances et de conquêtes. Cela a été sous l inspiration des airs de la modernité avec la Belle Époque, en répercutant dans le monde et aussi dans la Parahyba du Nord, que s est concrétisée la formation sociale de la professeur Anayde Beiriz et des femmes de son temps. L analyse de l écriture de soi confirme le discours normatif du contrôle moral social, le joug et les préjugés soufferts par Anayde Beiriz et l éducation différencié de genre qui ont déterminé ses habitudes et coutumes. C est-àdire, pour la femme, la permanence dans l espace privé, la retenue, l anoblissement des tâches ménagères et de la maternité comme sa plus haute aspiration, le support moral de la famille, la préservation de la tradition et la perpétuation des règles religieuses

A leitura de literatura na escola: por uma educação emocional de crianças na educação infantil

This dissertation examines the contributions of juvenile literature reading for the problematization of the emotional experiences and conflicts of children at infant education. Its importance consists in providing useful information for the pedagogic work orientated to literature reading at the initial series of basic education, in order to increase the teacher s ability to explore the literary text from its instigating and enriching nature in view of the child s emotional experiences and conflicts. It is methodologically based on the principles of the qualitative research, what characterizes it as a case study. The research focused a level V-infant education class with 28 students in 5-6 age group, at a public school of Natal, State of Rio Grande do Norte (Brazil). The used resources were: audio recording, field diary, and interviews. Seventeen classes were carried out and they consisted in reading sessions of classic and contemporaneous tales, fables, and legends which used different didactic strategies. These sessions were developed in accordance with the reading experience through scaffolding instructions as it was described by Graves & Graves. The theoretical references were the studies of Amarilha (1997/ 2006), Bettelheim (2004), Coelho (1987/2000), Damásio (2005), Del Nero (2003), Eco (1994/2006), Held (1980), Iser (1996), Jauss (2002), Stierle (2002), Wallon (2007), Telles (2006), Yunes (2003), and Zilberman (1987). The analyses showed that literary reading in class is a special environment for inclusion of the reader s subjectivity; as well as the inclusion of their emotional experiences and their conflicts within the story by way of helping children think and become suitable for dealing with their inner feelings. The literary reading is presented as an experiential and formative activity which helps children understand their emotions through a process of identification, exteriorization, and catharsis; what implies that the esthetic experience from the text makes possible the reader s self-knowledge and increases the perception of his inner feelings and objective reality so that this reader has emotional capital to deal with life difficulties. It is important to highlight that the discussions carried out in the class represented a field of sharing experiences through which each reader had the chance to present their experience of life to the others, including their sorrows and sufferings, in order to help them to develop best strategies to deal with the social environment

O cuidador familiar de pessoa com doença de Alzheimer: história oral de vida

The aim of the present study was to understand the feelings and the difficulties faced by the family caregiver in the care of the person affected by Alzheimer`s Disease (AD). It is a descriptive, exploratory study with a qualitative approach, using the oral life history proposed by Bom Meihy as the method. Data collection was conducted in the Basic Health Unit of Candelaria, located in Natal -RN, with five collaborators that carry out the role of family caregivers for people affected by Alzheimer`s disease (AD) and are members of the Group "Caring for those who Care". Caregi vers who resided with the affected family member for at least one year were selected for the study, and as a collection tool, it was opted to use semi-structured interviews via a script of open questions, recorded by permission of the collaborators, then t ranscribed and subsequently returned to respondents for checking the contents described. To analyze the results, the collaborators narrative technique was used in conjuction with the specific literature on the subject.The discussions were organized around five themes inherent to the guiding questions, and defined as follows: the incorporation of the role of the family caregiver; life before and after assuming the role of caregiver, the caregiver`s feelings and attitudes after assuming the care, difficulti es in caring, participation of the group as a foundation for caregivers. The stories showed many difficulties in the daily routine of the caregivers, and also that their participation in the group "Caring for those who Care" helps them in maintaining the q uality of their lives. The results open possibilities for the construction of new forms of approach and care for the people who fulfill the role of family caregiver contributing to strengthening of subsidies that help them better face the daily difficulti es.This study helped shed light on the fact that being a family caregiver of a person affected by AD is a suffered, exhausting and stressful condition involving much self-denial in one´s life. The situation experienced by these collaborators is considered a public health issue, and thus highlights the urgency for governmental political -social actions, besides the programs of care and health promotion for this target group.

Ensinando sobre a natureza da ciência: uma abordagem explícita e contextualizada a partir da história do vácuo

In last decades, the importance of including the contents of the Nature of Science (NOS) in Science Education has been emphasized. Several studies have focused on investigating the conceptions of NOS, supported by students and teachers, as well as design, implement and evaluate proposals that aim to provide a reflection on this theme in the educational context. Considering the complexity of such content, studies indicate the need for explicit and contextualized approaches and the History of Science (HS) is one of the possible paths to this inclusion. We started from the premise that, through a historical study, that aims to discuss the meaning and the basis of our "beliefs", we can know the process of building on what we "believe" and better understand its meaning. This thesis is part of this perspective, proposing to explore the History of the Vacuum, a themed high didactic potential still little used, in order to collaborate with the teaching content of NOS. We present actions on different fronts that originated three products in the context of this research. On the first front, we insert the research and production of instructional materials (three historical texts) to subsidize people interested in the implementation of HPS for educational context through this material. The relevance of this front is justified by the existence of gaps with regard to the production of such material for the context of teacher training. However, we consider that the preparation of instructional material of good quality and accessible does not guarantee that these resources will be used, if they will not be accompanied by discussions in teacher training, on how to use them, contexts and obstacles to be faced. The second part presented refers to the organization and implementation of a workshop for undergraduate students in physics and physics teachers, considering the instrumentalization of these individuals to the preparation and use of teaching strategies to approach aspects of NOS through episodes of History of the Vacuum, as well as the preparation of the text orientation for people interested in implementing the instructional material for secondary education. This guidance text contemplates the difficulties anticipated by the literature of the area and the main challenges faced by the participants about the didactic transposition of HPS for the educational context they were noted during the workshop. The relevance of this second front, in particular, is justified by the existence of gaps with regard to the inclusion of the theme of NOS and the HPS teacher training

Fontes primárias da história do vácuo e da pressão atmosférica na sala de aula: cartas e jornais históricos em articulação com o livro-texto do ensino médio

The use of the History and the Philosophy of Science (HPS) for the teaching of science and scientific subjects has been advocated in recent decades. It has been pointed out that the History of Science could make for a deeper learning of scientific concepts, since it would promote a contact with the problems which that knowledge has set out to solve. Furthermore, historical episodes would serve to put the discussions about the nature of scientific knowledge into context. With a view to explore those potentialities, the literature in the field has sought to identify the challenges and obstacles for the didactic transposition of subjects from the History of Science. Amongst many aspects, the deficiencies in the training of teachers, so that they can work with the insertion of HPS in the classroom have been highlighted. Another aspect that has been mentioned to be a challenge has to do with the didactic transposition of the Primary Sources, that is, of the original texts on the History of Science. The Primary Sources have significant potentialities: making a connection possible between scientists and concepts, showing the difficulties faced during scientific endeavors, perceiving the role of mistakes as obstacles to be surpassed, not as defeat, etc. On the other hand, there has been little exploration of these concepts in an educational context, due to their own peculiarities. The original texts are often hard to understand and their interpretation demands knowledge of the historical and scientific context in which they were written, as well as skills pertaining to the conduction of research in the field of the History of Science. With this scenario in mind, the research towards this Professional MSc degree starts from the challenge of elaborating and discussing proposals which could enable the didactical transposition of the Primary Sources. We have worked specifically with Primary Sources on the History of the Vacuum and of the Atmospheric Pressure, because of the insertion of these subjects in the Brazilian High School curriculum, in connection with the didactical textbooks. "Historic Journals" were made up from clippings of the original historical texts, as was a Didactical Unit, which takes the usual textbooks as a basis and contemplates using the Journals and the entire Primary Sources in High School. At last, we have elaborated and implemented a course designed for the preparation of teachers and for being an opportunity for the discussion of the feasibility of putting these kinds of proposal into practice

Uma história de vida e uma vida de histórias: memória e oralidade no Romanceiro de Dona Militana

Este estudio trata de establecer relaciones sobre la importancia del fenómeno sociocultural que emerge de Doña Militana para la cultura potiguar. Para tanto tomamos sus recuerdos de los romances como parte de un contexto social, relacionados con el tiempo y el espacio, que afecten a la vida material y moral de su grupo social. Resaltamos, por lo tanto, el fenómeno de la memoria individual en su relación con la memoria colectiva. Proponemos, en este sentido, suponer que el mantenimiento y permanencia de estos romances en la memoria de la romancera revelan una dinámica de su grupo social para la formación de su identidad. En este sentido, nos servimos como referencial teórico de los estudios de Maurice Halbwachs, en lo que respecta a los debates sobre la memoria colectiva, en paralelo a los estudios de Paul Zunthor cuando se trata de las funciones de la oralidad para la formación de la identidad. Para llevar a cabo los trabajos es de fundamental importancia, por supuesto, el relato de vida de la propia Doña Militana en confronto con los simbolismo culturales contenidos en los romances, con el objetivo que flagremos las (co)incidencias que demarquen la identidad de sus vínculos de identidad con el universo cultural en que está insertado. Como resultado, se tomó como objeto de análisis desde la deposición presentadas en las entrevistas, hasta los romances en sus aspectos poéticos, lingüísticos y mitológicos, incluyendo los significados que el desempeño de la romancera muestra. Objetivamos, por lo tanto, una comprensión dialógica de la relación entre la memoria individual (el caso de Doña Militana) con la memoria colectiva, sobre la base de un hipotético concepto que subyace a la aparente singularidad de este fenómeno - un hecho aislado en cierta medida - una razón intrínseca y compleja que se revela como la punta de un iceberg, al que convergen motivos históricos inconscientes de un patrimonio cultural

A letra escarlate como romance histórico: uma história de fragilidade humana e tristeza

The objective of this paper is to analyze the work of the American writer Nathaniel Hawthorne (1804 - 1864), The Scarlet Letter (1850), in the light of the contributions of Literature and History of the American people in the context of New England. Accordingly, we highlight aspects that justify the inclusion of the work as a historical novel, especially based on the reading of The Historical Novel (1936-37) written by Georg Lukács. The diversity of voices and social interrelationships that come out of the main characters of the plot of the novel, as well as their contextual buildings, constituted as important traces to understanding the novel as being of historical value. During our study, we found out that it is in the plots of the novels that the characters reflect, at the same time, the specific conditions of their singularities, the general trends of the historical process and the social conditions from which they arise. We also could see that it is in their singularities that lie special tendencies of human beings. Our references to this study came from scholars as Howard (1964), Bakhtin (1998), Eagleton (2006), Todorov (2009), Zabel (1947), Sellers (1985), Cunlife (1986), Candido (1993) and Schwarz (1981)

A História entre Tempos e Contratempos: Fontes Ibiapina e a obscura invenção do Piauí

Dans ce texte, nous prenons avec probleme le départment bresilien de Piauí comme espacialité de la Région « Nordeste », suivant les instants de son insertion politique et discursif dans l'identité régionale, qui s'est donnée entre la fin des années 1950 et débuts des années 1970. Pour ceci, nous proposons une analyse de discours identitaires de Piauí comme la littérature et le folklore produits alors, cherchant à rapporter telles discours avec les pratiques et intérêts politiques qui ont concouru pour la « nordestinization » de Piauí. Parmi ces discours et dans dialogue avec eux, nous prenons centralement l'oeuvre du juge et ecrivain João Nonon de Moura Fontes Ibiapina, emisseur de signes qui apparaît en ce moment. Notre objectif est discuter les images élaborées sur Piauí et son inclusion dans les stéréotypes cristallisés de Nordeste, comme la pauvreté et la nécessité, la vie dans le champs et la prédominance d'une « culture populaire » régionale. Dans une période d'importantes mutations dans la société brésilienne, dans la production culturelle, dans heurtes régionalistes Nordeste et dans les formes de penser et pratiquer les espaces, les intellectuels de Piauí que nous étudions ont essayé de recouvrir de mots et de sens la noirceur et l'incommode silence concernant le Piauí dans la Nation bresilienne, quand le déparment s'intégrait, au moyen de la Région, au Brésil urbain et industrialisé

O sertão virou verso, o verso virou sertão:sertão e sertanejos representados e ressignificados pela Literatura de Cordel (1900-1940)

Backland¹ are not only geographic spaces limited by physically established borders. It is a space composed by events, experiences, behavior, symbology, manners related to how to live and see the world. It is developed from historical processes and layers of discourses that contact each other, compete among themselves, establish agreement, promote consensus which define, resignify and update them over time. The present paper seeks to analyze and discuss the forms in which discourses produced by cordel literature² sold and consumed in popular locations, from backlands to coast cities, during the first four decades of 20th century, represented the environment, habits, moral codes, cultural traits, social types, rites and beliefs, related to northeastern backlands. The paper also aims to investigate the forms on how discourses produced by representations contributed to the constitution of backlands as a space culturally constructed. Poems from the poet and editor João Martins de Athayde will be used to establish dialogues between discourses produced by cordel and others discursive modalities, such as, newspapers, prose literature, painting, texts of memoirists and historiography, about backlands, analyzing how those representations circulated, were consumed and absorbed by backlands and other spaces inhabitants, contacted and agreed with other types of discourse, supporting the establishment of backlands as a space and countryside people as a social type

A história do intemperismo na Província Borborema Oriental, Nordeste do Brasil: implicações paleoclimáticas e tectônicas

Until some years ago, weathering geochronology was primarily based on the K-Ar and 40Ar/39Ar dating of supergene minerals. Recent advances in the analysis of supergene goethite by the (U-Th)/He method expanded the number of suitable minerals for such purpose, as well as the time of application for weathering geochronology. This study represents the first systematic approach in Brazil, combining both the 40Ar/39Ar e (U-Th)/He methodologies to improve the knowledge on the weathering and the age of nonfossiliferous sediments. Supported by geologic and geomorphologic correlations, we identified different types of weathering profiles occurring in the interior and coastal areas of northeastern Brazil. These profiles were correlated to main regional geomorphological domains: the Borborema Plateau , the Sertaneja Depression , and the Coastal Cuestas and Plains, and respective planation surfaces, which study is fundamental to understand the landscape evolution of the northern portion of the eastern Borborema Province. The depth and stratigraphic organization of the weathering profiles in each of the geomorphological domains permitted to establish that: (i) the profiles on the highlands that cap the Borborema Surface are deeper (up to 100 m) and can be considered as typical lateritic profiles; (ii) on the lowlands that form the Sertaneja Surface , the weathering profiles are shallow and poorly developed (2-5 m deep); (iii) the profiles along the coastal area are moderately developed (up to 25 m deep), and are characterized by thick saprolites and mottle zones. Aiming to establish the timing of the evolution of northeastern Brazil, we studied 29 weathering profiles representing distinct topographic levels of the Borborema Province, from the highlands to the coast, through the analysis of 248 grains of supergene manganese oxides using laser step-heating 40Ar/39Ar geochronology. Additionally, we applied the (U-Th)/He method in 20 weathering profiles, by dating 171 grains of supergene iron oxides and hydroxides. Geochronological results for 248 grains of manganese oxides analyzed by the 40Ar/39Ar method indicate that the weathering profiles in the study area record the history of weathering from the Oligocene to the Pleistocene, with ages in the order of 31.4 ± 1.0 Ma to 0.8 ± 0.4 Ma. Dating of 171 grains of goethite by the (U-Th)/He method yielded ages ranging from 43.2 ± 4.3 Ma to 0.8 ± 0.1 Ma, suggesting the weathering processes last from the Eocene to the Pleistocene. The precipitation of supergene goethite in this interval confirms the age of the weathering processes identified from the manganese oxides record. 105 goethite grains from 8 different occurrences of the Barreiras Formation were dated by the (U-Th)/He method. Five grains collected from the cement in the Barreiras Formation sandstones, in the Lagoa Salgada and Rio do Fogo coastal cuestas, yielded ages of 17.6 ± 1.8 Ma, 17.3 ± 1.7 Ma, 16.3 ± 1.6 Ma, 16.2 ± 1.6 Ma and 13.6 ± 1.4 Ma. Results of 69 goethite grains from authigenic pisoliths collected in 7 different localities also yielded concordant ages, varying from 17.8 ± 1.8 to 7.5 ± 0.8 Ma. Results obtained from 31 detrital grains are concordant in 3 distinct localities (Lagoa Salgada, Praia da Garças e Ponta Grossa); they vary in the range of 43.2 ± 4.3 to 21.6 ± 2.2 Ma, and indicate that the maximum age for the Barreiras Formation deposition is around 22 Ma. 40Ar/39Ar results for 15 manganese oxides grains associated with the Barreiras Formation weathering profiles, in 3 different localities, vary from 13.1 ± 0.9 to 7.7 ± 0.4 Ma, in the same range of ages obtained by the (U-Th)/He method. The systematic application of the 40Ar/39Ar and (U-Th)/He methods, respectively for manganese oxides and goethites, show that the Barreiras Formation sediments were already deposited since ca. 17 Ma, and that the weathering processes were active until ca. 7 Ma ago. The ages obtained from manganese oxides collected in the Cenozoic basalts (Macau Formation) also reveal a weathering history between 19 and 7 Ma, pointing to hot and humid conditions during most of the Miocene. 40Ar/39Ar ages yielded by manganese oxides associated with the Serra do Martins Formation vary from 14.1 ± 0.4 to 10.5 ± 0.3 Ma. On the other hand, (U-Th)/He ages from iron oxides/hydroxides collected in the Serra do Martins Formation mesas vary from 20.0 ± 2.0 to 5.5 ± 0.6 Ma, indicating that those sediments are older than 20 Ma. 40Ar/39Ar and (U-Th)/He results produced in this study are in agreement with paleoclimatic interpretations based on stable isotopes and clay index values measured in the Atlantic Ocean sediments, validating the use of weathering geochronology to investigate paleoclimatic variations. The direct dating of the Barreiras Formation permitted, for the first time, confident inferences on the age of the brittle deformation recorded by this sedimentary unit in the Rio Grande do Norte and Ceará states. The first event, syn-deposition, occurred during the early Miocene; an younger event, related to the post-depositional deformation of the Barreiras Formation, is associated with tectonic activity from the very early Miocene to the Holocene. In agreement with data from other areas, results obtained in this study reveal that the depth and complexity of the weathering profiles reflect the time of exposition of such areas to the weathering agents close to the surface. However, there is no clear relationship between ages vs. altitude. The depth and the stratigraphic organization of weathering profiles in northeastern Brazil, contrary to the southeastern Brazil pattern, do not vary toward the coast. In our study area, field observations reveal the presence of ancient, thick and complex lateritic profiles preserved in the sedimentary mesas on the Borborema Plateau, as younger, narrow and incipient ones occur in the dissected areas. Geochronological results obtained for these profiles yielded older ages on the high altitudes, and younger ages in the lowlands, suggesting the scarp retreatment is the most reliable model to explain the regional landscape evolution. However, in the coastal lowlands, the relatively older ages obtained indicate that more complexes processes were involved in the modeling of the local relief

Leiomioma vascular bucal: relato de dois casos, revisão da literatura e estudo imuno-histoquímico

INTRODUÇÃO: Os leiomiomas são neoplasias benignas do músculo liso que ocorrem mais comumente nos tratos geniturinário e gastrintestinal, entretanto são raros na cavidade bucal, na qual provavelmente a maioria desses tumores tem sua origem a partir de músculo liso vascular. OBJETIVOS: Relatar dois casos com história clínica semelhante, confrontando seus aspectos com aqueles encontrados na literatura. RELATO DOS CASOS: Dois casos de mulheres na quinta e sexta décadas de vida apresentando nódulo submucoso em ventre lingual. Após exame microscópico que revelou numerosos vasos sangüíneos entremeados a células fusiformes, com núcleos ovalados ou alongados, e exame imuno-histoquímico com positividade para actina de músculo liso nos dois casos, o diagnóstico final foi leiomioma vascular. CONCLUSÃO: O estudo do leiomioma vascular bucal é de extrema importância devido à raridade e semelhança desse com outras lesões da cavidade bucal. A análise imuno-histoquímica é importante para o diagnóstico final do leiomioma.

A história da ciência na formação do professor de física: subsídios para um curso sobre o tema atração gravitacional visando às mudanças de postura na ação docente

O objetivo desta pesquisa foi estudar como a evolução histórica dos modelos de atração entre corpos, tendo como pano de fundo a evolução dos modelos de mundo, pode auxiliar na formação inicial do docente de Física. Para tanto, sugerimos um planejamento de curso sobre o tema atração gravitacional, destinado principalmente a docentes de Física que atuam no ensino médio. O planejamento do curso foi baseado: em dados sobre a evolução dos modelos de mundo, buscando evidenciar como o conceito de atração gravitacional desenvolveu-se historicamente; nas concepções alternativas mais comuns encontradas na literatura, incluindo um breve esboço de noções diagnosticadas em uma amostra de docentes de Física de ensino médio; e em sugestões de leituras de resultados de pesquisas recentes sobre os processos de ensino e aprendizagem de ciências. Pretende-se fornecer aos docentes elementos de reflexão que lhes proporcionem mudanças de postura, através do questionamento da visão de ciência enquanto processo de construção e sobre sua própria prática de ensino. Partindo de resultados recentes da pesquisa em Ensino de Ciências, a metodologia sugerida privilegia o trabalho coletivo, com a realização de debates e sínteses. As atividades mencionadas são acompanhadas de justificativas sobre a escolha do tema e objetivos.