Estudo das propriedades magnéticas e estruturais do composto (Sm1 - xMMx)2Fe17 e seus nitretos

Conselho Nacional de Desenvolvimento Científico e Tecnológico

Processamento Inteligente de Sinais de Pressão e Temperatura Adquiridos Através de Sensores Permanentes em Poços de Petróleo

Originally aimed at operational objectives, the continuous measurement of well bottomhole pressure and temperature, recorded by permanent downhole gauges (PDG), finds vast applicability in reservoir management. It contributes for the monitoring of well performance and makes it possible to estimate reservoir parameters on the long term. However, notwithstanding its unquestionable value, data from PDG is characterized by a large noise content. Moreover, the presence of outliers within valid signal measurements seems to be a major problem as well. In this work, the initial treatment of PDG signals is addressed, based on curve smoothing, self-organizing maps and the discrete wavelet transform. Additionally, a system based on the coupling of fuzzy clustering with feed-forward neural networks is proposed for transient detection. The obtained results were considered quite satisfactory for offshore wells and matched real requisites for utilization

Análises clínicas, radiográfica e microscópica de molares permanentes sem ou com lesão de cárie na superfície oclusal

O presente trabalho, objetivou avaliar comparativamente o diagnóstico clínico, radiógráfico e histológico de molares permanentes humanos sem ou com lesão de cárie na superfície oclusa!. Vinte e quatro dentes que estavam armazenados em formalina a 10% foram selecionados e em seguida submetidos a um exame clínico, através da inspeção visual, onde foram separados em 3 grupos: grupo 1 (G1), formado por dentes hígidos; grupo 2(G2), por dentes com pigmento na superfície oclusal e grupo 3(G3), aqueles com lesão de cárie na oclusal. Este exame foi realizado com auxílio de luz artificial proveniente de um refletor odontológico, sem qualquer manipulação da superfície. Para cada dente foram realizados duas tomadas radiográficas com e sem tela milimetrada, no sentido vestibulo lingual por um dos avaliadores, simulando uma radiografia interproximal, onde o feixe incidiu perpendicular ao longo eixo do dente. Em seguida os dentes foram preparados histomorfologicamente para coloração com hematoxilina e eosina e análise microscópica. Pela avaliação dos resultados a partir da amostra de 100%, foi possível concluir: 1) Os dentes clinicamente considerados hígidos (G1) apresentaram radiograficamente 74,99% de ausência de imagem radiolúcida e em 25% presença desta imagem na Junção Amelo¬dentinária e microscopicamente ausência de cárie em 100%; 2) os dentes que clinicamente apresentaram fissura pigmentada' (G2) notou-se em 33,33%, ausência da imagem radiolúcida e em 66,66% presente esta imagem na junção amelodentinária, 100% de ausência de cárie através da análise microscópica; 3) clinicamente, os dentes que apresentaram lesão de cárie (G3), radiograficamente foram comprovados 100% de imagem radiolúcida sugestiva de cárie e microscopicamente dos 100% destas, foram considerados cáries rasa (16,66%), média (61,10%) e profunda (22,22%) respectivamente

A integração do tutorial interativo TryLogic via IMS Learning Tools Interoperability: construindo uma infraestrutura para o ensino de Lógica através de estratégias de demonstração e refutação

Logic courses represent a pedagogical challenge and the recorded number of cases of failures and of discontinuity in them is often high. Amont other difficulties, students face a cognitive overload to understand logical concepts in a relevant way. On that track, computational tools for learning are resources that help both in alleviating the cognitive overload scenarios and in allowing for the practical experimenting with theoretical concepts. The present study proposes an interactive tutorial, namely the TryLogic, aimed at teaching to solve logical conjectures either by proofs or refutations. The tool was developed from the architecture of the tool TryOcaml, through support of the communication of the web interface ProofWeb in accessing the proof assistant Coq. The goals of TryLogic are: (1) presenting a set of lessons for applying heuristic strategies in solving problems set in Propositional Logic; (2) stepwise organizing the exposition of concepts related to Natural Deduction and to Propositional Semantics in sequential steps; (3) providing interactive tasks to the students. The present study also aims at: presenting our implementation of a formal system for refutation; describing the integration of our infrastructure with the Virtual Learning Environment Moodle through the IMS Learning Tools Interoperability specification; presenting the Conjecture Generator that works for the tasks involving proving and refuting; and, finally to evaluate the learning experience of Logic students through the application of the conjecture solving task associated to the use of the TryLogic

Processamento Inteligente de Sinais de Pressão e Temperatura Adquiridos Através de Sensores Permanentes em Poços de Petróleo

Originally aimed at operational objectives, the continuous measurement of well bottomhole pressure and temperature, recorded by permanent downhole gauges (PDG), finds vast applicability in reservoir management. It contributes for the monitoring of well performance and makes it possible to estimate reservoir parameters on the long term. However, notwithstanding its unquestionable value, data from PDG is characterized by a large noise content. Moreover, the presence of outliers within valid signal measurements seems to be a major problem as well. In this work, the initial treatment of PDG signals is addressed, based on curve smoothing, self-organizing maps and the discrete wavelet transform. Additionally, a system based on the coupling of fuzzy clustering with feed-forward neural networks is proposed for transient detection. The obtained results were considered quite satisfactory for offshore wells and matched real requisites for utilization

Efeitos da simpaticotomia endoscópica sobre as artérias carótidas e vertebrais na terapêutica cirúrgica da hiperidrose primária

Analisar, em pacientes submetidos a simpaticotomia videotoracoscópica para tratamento da Hiperidrose Primária (HP), as conseqüências hemodinâmicas da desnervação vascular das artérias carótidas e vertebrais após a trans-secção cirúrgica da cadeia simpática torácica (simpaticotomia), através da mensuração de parâmetros ultra-sonográficos. Método: Vinte e quatro pacientes portadores de HP submetidos a quarenta e oito simpaticotomias torácicas endoscópicas foram avaliados através da mensuração da velocidade de pico sistólico (VPS), velocidade de pico diastólico (VPD), índice de pulsatibilidade (IP) e índice de resistência (IR) nas artérias carótidas comuns, internas e externas, além da artéria vertebral bilateralmente usando o eco-doppler duplex scan. As avaliações foram realizadas antes da intervenção cirúrgica e trinta dias após o procedimento. O teste de Wilcoxon foi usado na análise das diferenças entre as variáveis antes e depois da simpaticotomia. Resultados: A simpaticotomia no nível de T3 foi a trans-secção mais realizada (95,83%), seja isoladamente (25%) ou associada a T4 (62,50%) ou a T2 (8,33%). Houve aumento significativo no IR e no IP da artéria carótida comum bilateralmente (p<0,05). A VPD da artéria carótida interna diminuiu em ambos os lados (p<0,05). A VPS e a VPD da artéria vertebral direita também aumentaram (p<0,05). Achados assimétricos foram observados, de modo que artérias do lado direito foram as mais freqüentemente afetadas. Conclusões: Alterações hemodinâmicas foram observadas nas artérias vertebral e carótida após simpaticotomia para tratamento de HP. VPS foi o parâmetro mais freqüentemente alterado, principalmente nas artérias do lado direito, representando alterações assimétricas significantes nas artérias carótida e vertebral. Entretanto, são necessárias pesquisas subseqüentes para verificar se essas alterações são definitivas ou temporárias, uma vez que as inferências clínicas somente terão validação se as alterações forem permanentes

Natal qual é a sua cara?: análise do perfil edilício da avenida Eng. Roberto Freire (Natal/RN) à luz da acessibilidade

This study focuses on the building ensemble of Avenida Roberto Freire, a main road in Natal, Brazil, as a material expression of the confluence of various factors among which the following may be emphasized: high level of accessibility due to urban spatial re-structuring and the growth of the real estate market, in view of the increasing number of consumers, who arrived in Natal within the last decades. The intense urban modification process that has been going on in Natal since at least the 1980s, has engendered the formation of long axial lines which express the expansion dynamics and some of the forces subjacent to it. Avenida Roberto Freire has been an iconic example of an urban thoroughfare where architecture becomes primarily a communication support that can be perceived by fast moving passers-by, what brings it close to the venturian concept of strip (Venturi at al, 1972). The building types that line the road not only respond to the dynamics in process but also contribute to intensify it, as they house a variety of uses which attract people and generate more movement. The dynamics is further strengthened by the action of the real estate business which benefits from the increase of highly accessible locations, and from the private and public investments and incentives to tourism that aim to insert this city into the globalized world. Although the intention of reconstituting part of the history of density increase on this avenue in a diachronical perspective was attempted within the limits of the available references and documentation, the central contribution of this study is to understand the relations between topological accessibility and the typological nature of the building ensemble. By observing the synchronic morphological frame resulting from the spatial configuration analysis pertinent to this avenue (cf. Hillier and Hanson,1984) and the inventory and classification of the building ensemble there existing, this study aims to understand how architecture responds to accessibility in view of the real estate pressure, boosted by a cosmopolitanizing process brought about by the continuous flow of foreign and Brazilian arrivals as visitors, temporary or permanent residents

Obtenção de nanopartículas de hexaferrita de bário pelo método pechini

In this study barium hexaferrite was (general formulae BaFe12O19) was synthesized by the Pechini method under different conditions of heat treatment. Precursors like barium carbonate and iron nitrate were used. These magnetic ceramic, with magnetoplumbite type structure, are widely used as permanent magnet because of its excellent magnetic properties, such as: high Curie temperature, good magnetic anisotropy, high coercivity and corrosion resistance. The samples were characterized by thermal analysis (DTA and TG), X- ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM) end Vibrating sample Magnetometer (VSM). The results confirm the expected phase, which was reinforced according to our analysis. A single phase powder at relatively high temperatures with particle sizes around 100 nm was obtained. The characteristic magnetic behavior one of the phases has been noted (probably superparamagnetic material), while another phase was identified as a ferrimagnetic material. The ferrimagnetic phase showed vortex configuration with two central and slightly inclined plateaus. In general, increase of heat treatment temperature and time, directly influenced the technological properties of the samples

O impacto do programa do leite na vda familiar dos beneficiários do Rio Grande do Norte - Natal

This present study aims to identify and evaluate the impacts caused by the state Programa do Leite in the familiar life of the ones that get this benefit in Natal, from 2003 to 2008. The interviews were done in the four areas of the city and show the high level of poverty of the ones registered in the benefit. The introduction of the families in the program changed their habits. The study also shows the fragility of the poor population inside social welfare works like this one. Some of these programs become permanent by the politicians and by the lack of economic independence of the ones that get the benefit, causing much more dependence of these people on the social program

Políticas Culturais e Gestão Cultural: a Secretaria Municipal da Cultura e do Turismo SEMUC (2005-2010) de Limoeiro do Norte-CE

The study analyzed regarding cultural policies developed in the city of North-EC Limoeiro by the Municipal Culture and Tourism (Semuc) in the period between the years 2005 and 2010. Period that marks the resumption of the figure of the State Ministry of Culture (MinC) as a major factor in formulating and implementing public policies in the area of culture in the country, especially with the creation of the National Culture System (CNS) and the preparation of National Culture Plan (NCP). The work was through research documents (laws) about what had legislated on culture in the city, the reports of consultation activities undertaken by Semuc and interviews with former managers, a former - employee and the Secretary of that folder. Thus, given the contemporary context where the culture is replaced by increasing visibility, the analysis undertaken on policies developed by cultural Semuc revealed the most diverse forms of action: investment in events (capture and promotion), the institution permanent cultural policies, cultural background, the appreciation of local culture, and specific actions

A organização do processo legislativo na Assembléia Legislativa do Rio Grande do Norte

This work evaluates the organization of the legislative activities and the decision-making process within the Legislative Assembly of RN, emphasizing the role of ruling institutions on the Legislative Power working, as well as the structure of its decisions. The organization and the production of the decision-making process inside the Legislative Assembly will be seen along with how institutional norms determine the nature of the legislative process and influence his legal production. The period under study extends from 1990/94 to 1994/97 legislatures. The work is divided in three parts. The first analyzes the legislative process, the role of legal production, the nature of the legislation produced during the time referred and the role of the decisory instances: the directive Table, the leaders collegiate and the permanent commissions; the second part will present the results of questionnaires made to the deputies about their perspective concerning the actual power structure, as well as a more desirable power distribution among different decisory instances in the Assembly. At last, part three will focus on the Executive power role exerted on the legislative process, analyzing how it makes use of his initiating and veto prerogatives, via the study of some laws sanctioned in 1990-1997

Universo encantado do cuidado na autopoiese docente: uma viagem epistemológica transdisciplinar

The health transition experienced in Brazilian health care model requires a metamorphosis in human and society, placing new demands on health and education. The Faculty of Science, Culture and Extension of Rio Grande do Norte (Facex), aware of their responsibilities to the Health System, which brings the principle of comprehensiveness as its structural axis, dared to implement a course of nursing in complex thinking and Experiential Pedagogy Humanescente with curriculum inter / transdisciplinary. For deployment of proprosta was not enough to reform thinking of educators, there was a need corporalizar new teaching practices that are aimed at the integral formation of human beings. In this context, emerged the workshop on Human Education autopoietic, self-forming area of the educator, where he developed an Action Research Existential (PA-E) which enabled experience, describe and analyze how the human autopoietic educators could contribute to the practice educational humanescente transdisciplinary curriculum project. Were worked out in meetings, knowledge necessary to practice the transdisciplinary 1st Meeting - learn to create; 2nd Meeting - learn to recognize the laws of nature with emphasis on complexity theory, 3rd Meeting - learn to organize, 4th meeting - namely autoestruturar themselves; 5th Meeting - know how to choose, 6th Meeting - knowing innovate 7th Meeting - namely exchange. Next an autobiographical perspective, we chose the metaphorical possibility to narrate the ways and strategies covered by the author and apprentice in the company of the Little Prince de Saint-Exupery, in search of a sensible pedagogical practice complex, which promotes re-enchant transdisicplinar education. The route involved five methodological connections: a literature review which relate to training for care in undergraduate nursing: the study of learning processes that drive the formation humanopoiética, emphasizing the relationship that involves the complexity and embodiment in the educational process transdisciplinary, highlighting the analysis of what is to learn from the findings of biosciences and recent cognitive theories of Maturana and Varela, the description of the interdisciplinary curriculum of the nursing course of Facex and Training Workshop, Human autopoietic, with emphasis on Experiential Education Humanescente; the report of seven meetings of the Workshops (cocoon), recording the experiences and listening to educators (luminescent butterflies), the final reflections with learning opportunized. Experientiality lived through, the expressions and words, educators say the influence of workshops for their teaching practices, highlighting it as a space for selforganizing, creating, learning and enchantment, and can identify the workshop as a place of transformation necessary for deployment an interdisciplinary curriculum. The knowledge emerging from the study indicate the need for permanent spaces of self, in which the educator learns from its body, between cognitive processes and vital, and in the experiences of their formative process the opportunity to act on the dimensions of knowing and being

O Programa Pró-Letramento e a formação de alfabetizadores: repercussões nas concepções e práticas de professores cursistas

This paper intents to investigate the repercussions of the Pró-Letramento - Alphabetization and Language Course Program in the practices and conceptions of alphabetization of learning teachers, according to their own perspectives. The program, part of the National Formation Network of the Education Ministry, in partnership with public universities since 2006, is destined to aid the formation of teachers acting in the first three years of public basic education, with the goal of qualifying them to work with alphabetization and improve quality of learning processes and results. This investigation adopted the qualitative research paradigm as well as the Case Study methodology, being our empirical field a Belém do Brejo do Cruz/PB public school. The subjects are five Program graduation female teachers, including the tutor-trainer and four graduated teachers that already teach in the first three years of basic education. The data, gathered with documental analysis, individual and collective semi-structured interview, and non-participant observation, were analyzed according with Speech Analysis principals. Based on those principals, we intersected teachers enunciations, observation sessions registries and the Program s propositions and built interpretations based on theorization taken as fundaments of the investigation, among which we highlight: studies on a criticalreflexive perspective of a teacher s formation; continued formation as a permanent development process; the principals of historical-cultural approach on alphabetization processes and development with the centrality of language; alphabetization in a interactionist approach. The analysis focused on the Program s repercussions: 1) in the teachers conceptions about: 1.1) learning; 1.2) Alphabetization and literacy; and in the practices and conceptions related to: 1.3) alphabetization in a literacy perspective and 1.4) appropriation of the writing system. The corpus analysis evidenced relations of continuity and discontinuity, approach and distancing between the teachers conceptions and the Program s propositions, as well as conceptions/significance of their speeches and related or observed practices. Observing teachers elaborations evidences the repercussion of the Program s formation, whilst also showing gaps and mismatches in their appropriation process in concepts/assumptions as well as teaching propositions. These mismatches involve interaction relationships between teachers and students, with their possibilities and limitations surrounding the Program s knowledge objects complexity, also linking to the social, economical, political, and cultural conditions that involve both the implementation of the Program in each context and the conditions in which alphabetization in public schools are developed, demanding permanent and accompanied formation processes, investments to improve work conditions and valuing teaching

Educar para o lar, educar para a vida :cultura escolar e modernidade educacional na Escola Doméstica de Natal (1914-1945)

La recherche propose un nouveau regard sur l Institution Scolaire École Doméstica de Natal, en essayant de tenir compte de la multiplicité des auteurs et des pratiques développées à l école qui définissaient le mieux et expliquaient les phénomènes de cette réalité éducative et des rapports avec le temps et le lieu où elle s insérait. Pour ce faire, les concepts de mémoire et culture scolaire ont été fondamentaux pour la compréhension de ces pratiques, parce qu ils ont contribué à notre lecture historique-culturelle de l ensemble d aspects institutionnalisés à l école, comme son curriculum, ses finalités, ses façons d enseigner et d apprendre, ses règles de conduite, ses normes, enfin, ce qui caractérisait son organisation et ses pratiques quotidiennes. C était l École Doméstica de Natal l institution pionnière dans le modèle d éducation féminine au Brésil, nous le reconnaissons en priorité et nous visons à le circonscrire à son indélébile contribution à l Histoire de l Éducation de Rio Grande do Norte. Conçue par un modèle d organisation scolaire européen pour l éducation féminine, l École Doméstica de Natal a été inaugurée en 1914, en ayant comme créateur l intelectuel de Rio Grande do Norte Henrique Castriciano de Souza. Sa singularité, s opposant aux écoles féminines existantes au Rio Grande do Norte et au Brésil en ce temps-là, était dû au modèle scolaire adopté, qui appuyait sur la formation d une femme préparée à répondre aux aspirations modernes surgissant avec l avènement de la République. Ce contexte exigeait de l école la formation d un modèle de femme dans les aspects moral, physique, culturel et intelectuel modelés sur les idéaux de l ordre et du progrès. Ce serait une nouvelle méthode d éducation scolaire qui pourrait favoriser la modernisation des anciennes méthodes d enseignement, provoquant le surgissement de modèles qui impliqueraient une nouvelle organisation pédagogique aux écoles de l`État et conduiraient la ville à de nouveaux et hauts paliers de culture et civilité. Avec cela, l école contribuerait à ce que la femme joue un rôle dans la société d une manière plus active, sociale et mieux adaptée. Les mots ordre, nouveau, civilité, moderne et progrès se répandaient et s entrecroisaient avec des valeurs archaïques toujours permanentes et enracinées dans la vision de vie et l idée de monde d alors. Ainsi, on voyait que l École Doméstica était une institution modèle, spécifique dans sa fonction, qui apporterait à la ville et, particulièrement au Rio Grande do Norte, des idées de civilité, ordre et progrès

Conhecimento do enfermeiro sobre o processo de cuidar do paciente com traumatismo cranioencefálico

Estudo de caráter exploratório e descritivo, de abordagem quantitativa, realizado num hospital de urgência hospitalar referência em traumatologia, em Natal/RN, com o objetivo de identificar o conhecimento do enfermeiro a respeito da ECGl para avaliação do nível de consciência e do processo de cuidar na fase pré-hospitalar e hospitalar às vítimas de TCE. A população constou de 44 enfermeiros e os dados foram coletados entre abril e maio de 2010. Os resultados mostram que, 35 (79,5%) dos enfermeiros eram do sexo feminino; 17 (38,64%) estavam na faixa etária entre 24 a 30 anos e 12 (27,27%) entre 51 a 60 anos; 25(56,82%) solteiros, 30 (68,18%) católicos e 25 (56,82%) sem filhos; 40 (90,90%) eram formados por instituições públicas, 18 (40,92%) tinham tempo de serviço na enfermagem acima de 21 anos e 14 (31,82%) até quatro anos; 18 (40,91%) estavam alocados nas UTIs e 13 (29,55%) atuavam em mais de um setor e 20 (65,90%) possuíam especialização. Dos que estavam mais especializados, 18 (40,92%) tinham tempo de serviço até quatro anos e 08 (34,48%) acima de 21 anos. Todos relataram ter prestado assistência às vítimas de TCE e 36 (81,82%) sentiam-se preparados; 35 (46,67%) adquiriram essas informações na prática e apenas 8 (10,67%) na graduação. Em relação a opinião dos pesquisados sobre os empecilhos que dificultam esta assistência, 23 (23,01%) relataram déficit de recursos humanos e 19 (20,65%) despreparo da equipe de enfermagem, estrutura física inadequada e recursos materiais precários. Como propostas de solução para os problemas, 26 (47,27%) sugeriram reforma na gestão e 13 (23,63%) referiram educação continuada. Em relação a ECGl, 40 (90,1%) afirmaram conhecê-la, 33 (82,50%) a utilizavam, 32 (80%) conheciam sua finalidade, 25 (62,5%) acertaram os indicadores fisiológicos e 36 (90%) classificaram corretamente a gravidade do TCE. Dos enfermeiros que utilizam a ECGl, 23 (92%) conheciam seus indicadores e classificação e 20 (60,61%) utilizavam uma vez por plantão. Em relação às dificuldades no manejo da ECGl, 11 (21,58%) não tinham nenhum problema; 10 (19,60%) citaram a falta de tempo e com o mesmo percentual responderam interpretação da resposta verbal nos pacientes intubados. Quanto ao conhecimento dos enfermeiros na descrição do processo de cuidar, 31 (70,45%) das respostas da fase pré e 35 (79,55%) da hospitalar não possuíam etapas importantes, sendo consideradas como incorretas. Quanto à afirmativa dos enfermeiros em estar, e realmente estar preparados para esta assistência, detectamos que daqueles que disseram estar preparados, apenas 12 (33,33%) acertaram todos os passos do atendimento pré hospitalar e 6 (16,67%) no atendimento hospitalar. Concluímos que diante dos resultados obtidos, os enfermeiros conhecem a ECGl, no entanto, necessitam de capacitação para sua melhor compreensão e utilização. Quanto ao conhecimento do processo de cuidar aos pacientes com TCE, é necessário modificar urgente esta realidade, especialmente na atenção às ações desenvolvidas pelo enfermeiro no âmbito hospitalar, onde as consequências das lesões secundárias, muitas delas evitadas com diagnóstico precoce e intervenções imediatas, podem acarretar incapacidades permanentes e prejudicar a qualidade de vida desses indivíduos