Pirólise termoquímica de pós da fibra de coco seco em um reator de cilindro rotativo para produção de bio-óleo

This master thesis aims at developing a new methodology for thermochemical degradation of dry coconut fiber (dp = 0.25mm) using laboratory rotating cylinder reactor with the goal of producing bio-oil. The biomass was characterized by infrared spectroscopy with Fourier transform FTIR, thermogravimetric analysis TG, with evaluation of activation energy the in non-isothermal regime with heating rates of 5 and 10 °C/min, differential themogravimetric analysis DTG, sweeping electron microscopy SEM, higher heating value - HHV, immediate analysis such as evaluated all the amounts of its main constituents, i.e., lignin, cellulose and hemicelluloses. In the process, it was evaluated: reaction temperature (450, 500 and 550oC), carrier gas flow rate (50 and 100 cm³/min) and spin speed (20 and 25 Hz) to condensate the bio-oil. The feed rate of biomass (540 g/h), the rotation of the rotating cylinder (33.7 rpm) and reaction time (30 33 min) were constant. The phases obtained from the process of pyrolysis of dry coconut fiber were bio-oil, char and the gas phase non-condensed. A macroscopic mass balance was applied based on the weight of each phase to evaluate their yield. The highest yield of 20% was obtained from the following conditions: temperature of 500oC, inert gas flow of 100 cm³/min and spin speed of 20 Hz. In that condition, the yield in char was 24.3%, non-condensable gas phase was 37.6% and losses of approximately 22.6%. The following physicochemical properties: density, viscosity, pH, higher heating value, char content, FTIR and CHN analysis were evaluated. The sample obtained in the best operational condition was subjected to a qualitative chromatographic analysis aiming to know the constituents of the produced bio-oil, which were: phenol followed by sirigol, acetovanilona and vinyl guaiacol. The solid phase (char) was characterized through an immediate analysis (evaluation of moisture, volatiles, ashes and fixed carbon), higher heating value and FTIR. The non-condensing gas phase presented as main constituents CO2, CO and H2. The results were compared to the ones mentioned by the literature.

Práticas clientelistas e dádivas como estratégias de hegemonia política: uma análise sobre o campo da saúde em Mossoró-RN

The reality experienced by many families and individuals who seek and require the services of the Unified Health System - SUS, the relationships between users, health professionals, and political representatives, establishes the core of the issue that guides the choice and interest of this study concerning the prominence of clientelist practices and gifts that permeate the health field. The research is based on the analysis and reflection of the intrinsic relationship between the health and political fields. It analyses the health field and its relationship with the dynamics and developments of the local political scenario relating it to the implementation of the Family Health Program and Community Health Agents Program (PACS/PSF health programs) in the city of Mossoró, State of Rio Grande do Norte which refers to the period 1991-2010; and falls into a methodological perspective of qualitative approach. The methodological tools and techniques used were based on semi-structured interviews, direct observation of the field, journalistic texts and documentary sources. The construction and questioning of the object of the research were based on theoretical contributions from authors discussing the social field and symbolic power: Bourdieu (2005); clientelist relationships and gifts from asymmetric exchanges: Rouland (1997), Lanna (1995), Martins (1999), Carvalho (1999), Diniz (1982); exercise of hegemony and political strategy from authors who analyse this subject: Gramsci (1995), Coutinho (1981), and Gruppi (1978). Furthermore, the research has established dialogues with authors who address the dynamics of Brazilian politics such as Baquero (2001) and Weffort (1993). The collected data were subjected to qualitative content analysis. The results showed that with the implementation of the PACS/PSF programs in the aforementioned city, the health field has established itself as a key scenario for the exercise of political hegemony of the factions that dominate this socio-political context, resizing clientelist practices, however, without modifying the power structures within this social scenario

Avaliação do programa escola ativa como política pública para escolas do campo com turmas multisseriadas: a experiência em jardim do seridó/rn (1998-2009)

This work aims at developing an evaluation of the implementation of the Program Escola Ativa as a public policy for rural schools with combined grade classrooms in Jardim do Seridó RN (1998 2009) focusing on the following dimensions: school s physical environment, training, follow up, and didactic usage of the methodology. In order to develop this research we refer to the literature that analyzes the cycle of policies (FREY, 2000). In this approach, evaluation represents an important step in the process of analyzing the implementation of public policies, as a way of measuring up their performance, as well as a guide for realignments and redefinitions (PRESSMAN; WILDAVSKY, 1998). In order to accomplish this function, the evaluator of policies must be acquainted with scientific concepts and methods that consist of describing, interpreting and analyzing the policies in the governmental sphere (MENY; THOENIG, 1992; LIMA JÚNIOR, 1978). In this perspective, we intend to investigate whether in its proposition of minimizing the blanks in the Brazilian educational system, the implementation of the Program would be contributing to the improvement of the political-pedagogical practices in the rural schools with combined grade classrooms in Jardim do Seridó RN. In order to do this research, we have developed a theoretical-methodological matrix made of analysis dimensions, variables, indicators and instruments, such as literary revision, documental analysis, semi-structured interviews with four teachers and three supervisors that work and/or have worked in Escola Ativa in that town in the period comprised among 1998 2009, besides notes taken from field observation and photographs from four rural schools with combined grade classrooms. With this research we have identified that the Program, at a national level, has gone through different phases in its implementation process, for the town was not ready to fully take the responsibilities of the autonomous expansion, in 2002. From that period on, the execution of Escola Ativa has suffered several discontinuities, such as the lack of professional training and supervising. It is also noted that the methodology contributes to the dynamization of the didactic-pedagogical activities and promotes the cooperation and autonomy of the students in the organization and the applicability of the components of the curriculum, especially of Governo Estudantil and Cantinhos de Aprendizagem. Although the directions of the Program (BRASIL, 2005) point out that Escola Ativa has among its principles social transformation, we identified that, isolated, the initiative is not capable of promoting the changes that the rural schools need, namely investments in the physical, material, pedagogical and technological infra-structure, besides the estimation and a career plan for the teachers. In a general draft of the results of this research, we realized that some aspects presented about the peculiarities of Escola Ativa in Jardim do Seridó as a governmental Program, reinforce the need for the public policies to be evaluated, in order to confront critic and operationally the planning with the practice, revising action, whenever necessary

Mudanças nos modelos de gestão: a política educacional e dos (des)acertos da experiência no Rio Grande do Norte (1995-1999)

This work focuses on the educational policies, on the necessity of adopting new models of administration of the education, as well as the implementation of reforms in this filed during the 1990 s. It analyzes the strategies of decentralization of the education in Rio Grande do Norte, disclosing practices conceived in the governmental plans and programs. It also aims to evidence the aspects of the decentralization proposed in the educational system management model, adopted by the Department of Education and Culture of Rio Grande do Norte from 1995 to 1999. Bibliographic researches and documental analysis were used as sources and semi-structured interviews were held in order to collect data. This work also highlights the concepts of participation, autonomy and democratic management intrinsic to the process of decentralization in the education field. It is clear that decentralization, as the vector of democracy, requires not only certain conditions that assure the universal access to the necessary information, but also that all segments of the institution have a voice in the collegiates and that the management and decision-making processes be transparent. This analysis reveals the importance of creating means to promote autonomy, participation and democratic management in order to consolidate a decentralized system. It is also clear that these mechanisms have been proposed in a vague way by the governmental guidelines, which makes it harder to consolidate a democratic management model. Having this perspective as a parameter, it is possible to realize that the adoption of a management model prompted by the law hasn t established effective means of participation that, consequently, should provide decision centralizers which opposed to the democratic actions

A dimensão espacial e o proceder pedagógico

This research was conducted at the Post Graduate Program in Education at the Federal University of Rio Grande do Norte. It had the aim to understand the spatial conception associated with the pedagogical action. It promoted a historical-scientific approach to concepts of space to emphasize the spatiality from the geographical and educational theoretical referential. In it empiria situated in a university student universe, has utilized a quantitative measuring instrument as a subsidy to a qualitative dialogical analysis. It showed a synthetic framework arising from the interaction and the reflection focused into problems, challenges and potential of a pedagogical vision that considers the spatiality of teaching education. It seeks to promote delineations of paths pedagogical to a integrate approach of heterotopic space conception, as a necessary critical condition to the appropriation of social reality without doing the epistemological dichotomy, enhancing it signification to the learning academic teaching ambience; as well the scientific and teaching formation in the geography course

O Evangelho segundo a Pastoral da Criança :por uma pedagogia da sobrevivência

This work aims to analyze social and educational actions at Pastoral da Criança, using education as a survival tool. This was done at Parque dos Coqueiros, a neighborhood in Natal, Rio Grande do Norte. The methodology for data collection was composed of comprehensive interview (Jean Kaufmann), participant observation (Robert Bogdan) and documental analysis (Le Goff); all os which bring reflections related to concepts such as strategies, tatics and know how (Michel de Certeau), configuration (Nobert Elias), and control technology (Michel de Foucault), care ethics (Leonardo Boff) and etno-theories (Natália Ramos). Pastoral da Criança is a social action organism that belongs to the National Conference of Bishops of Brazil, originated at Florestópolis, Londrina (Paraná), in the year of 1983. These actions have been an expression of a new logic of actions of the Catholic Church. It values the participation of laymen in the activities of the Pastoral. Thus, the parish is seen as a nucleus that irradiates the Church s Social Doctrine. At Rio Grande do Norte this institution has guided poverty stricken families on issues related to children s health as well as working with laymen for volunteer work. This is considered devotion, that is firmed by an individual and group mystique. The social and educational actions are done in three axes: 1) Monthly home visits, where there is mother-child support; 2) Life Celebration Day, where they weigh children and promote nutritional surveillance; 3) Meeting for Evaluation and Reflection, that aims to articulate community leaders to think about problems attached to the social actions they realize. This action tripod , as it is called by the Pastoral Agents are the types of actions that fundament survival education for poor children ranging from 0 to 6 years old. The families learn to deal with prevention, the essential, the alternative and probabilities of survival tactics due to exclusion matters or even social extermination. The Pastoral da Criança aims to recover childhood emotions in poverty stricken areas. It also has influence in the diminishing of malnutrition and mother and child mortality. This education for survival is the base on the art of teaching and learning of poverty stricken children. It is a social educational action, non assistencialist, but considered a shy action in order to promote mobilization of the communities that are accompanied for the emancipation and change of social conditions

Metodologia de análise e diagnóstico de fratura em um componente automotivo sujeito a cargas cíclicas alternadas

The competitiveness of the trade generated by the higher availability of products with lower quality and cost promoted a new reality of industrial production with small clearances. Track deviations at the production are not discarded, uncertainties can statistically occur. The world consumer and the Brazilian one are supported by the consumer protection code, in lawsuits against the products poor quality. An automobile is composed of various systems and thousands of constituent parts, increasing the likelihood of failure. The dynamic and security systems are critical in relation to the consequences of possible failures. The investigation of the failure gives us the possibility of learning and contributing to various improvements. Our main purpose in this work is to develop a systematic, specific methodology by investigating the root cause of the flaw occurred on an axle end of the front suspension of an automobile, and to perform comparative data analyses between the fractured part and the project information. Our research was based on a flaw generated in an automotive suspension system involved in a mechanical judicial cause, resulting in property and personal damages. In the investigations concerning the analysis of mechanical flaws, knowledge on materials engineering plays a crucial role in the process, since it enables applying techniques for characterizing materials, relating the technical attributes required from a respective part with its structure of manufacturing material, thus providing a greater scientific contribution to the work. The specific methodology developed follows its own flowchart. In the early phase, the data in the records and information on the involved ones were collected. The following laboratory analyses were performed: macrography of the fracture, micrography with SEM (Scanning Electron Microscope) of the initial and final fracture, phase analysis with optical microscopy, Brinell hardness and Vickers microhardness analyses, quantitative and qualitative chemical analysis, by using X-ray fluorescence and optical spectroscopy for carbon analysis, qualitative study on the state of tension was done. Field data were also collected. In the analyses data of the values resulting from the fractured stock parts and the design values were compared. After the investigation, one concluded that: the developed methodology systematized the investigation and enabled crossing data, thus minimizing diagnostic error probability, the morphology of the fracture indicates failure by the fatigue mechanism in a geometrically propitious location, a tension hub, the part was subjected to low tensions by the sectional area of the final fracture, the manufacturing material of the fractured part has low ductility, the component fractured in an earlier moment than the one recommended by the manufacturer, the percentages of C, Si, Mn and Cr of the fractured part present values which differ from the design ones, the hardness value of the superior limit of the fractured part is higher than that of the design, and there is no manufacturing uniformity between stock and fractured part. The work will contribute to optimizing the guidance of the actions in a mechanical engineering judicial expertise

Inclusão do aluno com dismotria cerebral ontogenética: analise das práticas pedagógicas

Há poucas investigações quanto às práticas educativas escolas, ou seja, os procedimentos que são utilizados pelo educador para promover a aprendizagem de seus alunos. Deste modo, o objetivo deste trabalho é analisar as práticas educativas escolares, e verificar em que medida essas práticas contribuem para a inclusão do aluno com Necessidades Educacionais Especiais. O presente estudo optou pelo estudo exploratório contemplando observações em sala de aula, bem como, no ambiente escolar. As observações ocorriam semanalmente sem datas fixas, e em horários diferentes, a fim de que fosse possível observação num ambiente típico. Utilizou-se também a entrevista e a análise de documentos do aluno (redação, provas, atividades acadêmicas) e da escola. Participaram do presente estudo um aluno que apresenta dismotria cerebral ontogenética, sua mãe, bem como, as professoras que lecionaram à ele durante os anos de 2000 e 2001. Os dados coletados auxiliaram para definir a categoria que foi foco da presente pesquisa: desempenho e rendimento escolar e percepção do aluno sobre seu processo de aprendizagem. Como conclusão o presente estudo constatou que o processo de inclusão do aluno, no tocante à inclusão física social, responde até certo grau às suas necessidades. No entanto, do ponto de vista de aprendizagem, não houve inclusão educacional, as práticas educativas observadas não contemplavam a especificidade curricular e de aprendizagem a fim de atender às necessidades do aluno.

Avaliação da usabilidade de um sistema informatizado de controle acadêmico: um estudo com coordenadores e secretários de cursos stricto sensu da UFRN

The aim of this study is to assess the usability of the Integrated Management System for Academic Activities (SIGAA) for the sensu stricto postgraduate programs at Universidade Federal do Rio Grande do Norte. The study was based on ergonomic criteria proposed by Bastien and Scapin (1993) and the Federal Government s Handbook of Usability (2010). The methodology used was a descriptive data survey involving an online questionnaire, and a sample of 46 system users, composed of coordinators and secretaries from the sensu stricto postgraduate programs. In addition to this procedure, open interviews were held with the users as well as a documental analysis of calls registered by them at the SIGAA between May 2012 and June 2013. Data analysis showed that a number of additional usability criteria need to be implemented, primarily related to ergonomic problems of orientation, error management and workload. Based on the analyses, several changes were proposed that may streamline secretarial activities, as well as provide greater satisfaction and interaction between the SIGAA and its users

A Psicologia do trabalho e das organizações na formação do psicólogo no Brasil

This research has aimed to analyze the presence of the Work and Organizational Psychology (WOP) at the psychologist s undergraduate education after 2004 s National Curricular Guidelines in Brazil. It has investigated in 43 Brazilian undergraduate courses of Psychology how their Course Pedagogical Projects (CPPs) approach the WOP issues. For that investigation, the CPPs, the subjects programmes related to the WOP and the curriculum grid have been accurately read and analyzed. Categories created by similar studies have also been used. The studied knowledge field has been cited by 41 courses, mainly on the definition of the egress s professional profile, on the expected competences and on the psychologist s formation process lines. Moreover, 28 courses have disposed curricular emphasis on the WOP and 12 have provided professional practices on that Psychology s field. All the courses have displayed, at least, one subject related to the WOP and in 29 cases there have been found between two and six subjects concerned to that field of Psychology, occupying nearby 10% of the whole courses credit hours. It has been verified that the Work and Organizational Psychology is allied to discussions about Quality of Life and Health of the Worker, bonded to work prescriptions at the Personnel Management departments and in other places such as syndicates. Additionally, 37% (147) of the WOP s subjects concerns to the contents of the Work Psychology, 21% (81) relates to the Organizational Psychology, 18% (71) are about Industrial Psychology s topics and 14% (55) debates the field generically. The most often issues are: Recruitment and Selection (25 courses); Training, Development, Learning and Education (24); and Work and Mental Health (24). Those topics have assumed three functions: providing principles for the acting at the WOP field; tutoring psychologists to analyze their own workplaces; and offering a comprehension of the human being mediated by the Work. It has been concluded that the WOP is incorporated on the psychologist s undergraduate education by considering the increasing of its presence and the occurrence of its traditional and emergent topics

O cotidiano do(a) Assistente Social frente as demandas apresentadas pela paciente portadora do câncer de mama em tratamento no Hospital Doutor Luiz Antônio em Natal/RN

This work deals with an analysis related to the social worker s practice in the oncology area. It aims to identify demands, work conditions as well as current challenges related to this profession. It considers the specificities of breast cancer and relates it to political decisions in the health sector considering the concept of contemporary capitalism. The study analyzes professional action and the demands presented by breast cancer patients who are currently in treatment in Hospital Dr. Luiz Antônio em Natal-Rio Grande do Norte-Brazil. The methodological procedures considered of documental analysis, semi-structured interviews (with two social workers that work with fifteen breast cancer patients) as well as participant observation; which was done counting with my own professional practice in the oncology area. Thus, the research also discusses the breast cancer issue in the life of the users considering their social-economical, cultural and political determinants. Factors such as age in which the diagnosis was known, the relation user/social workers, number of children, rights of the oncology patient, place where he/she lives, education, civil status, (re)insertion of the professional in the work field, perception of self-esteem and bio-psycho-social representation of breast cancer in the lives of these women, all of which were dealt with in this research

Experiências de famílias na imunização de crianças brasileiras menores de dois anos

O objetivo foi descrever as experiências de famílias sobre imunização de crianças menores de dois anos. É estudo de natureza descritiva, com análise qualitativa dos dados, entrevistas não estruturadas com 22 sujeitos. Os resultados foram agrupados em: conhecimentos práticos sobre imunização, responsabilidade e obrigatoriedade na imunização e ampliação da prática de imunização. Foram destacados elementos que fortalecem a imunização: experiência e realização pessoal no papel de ser mãe, temor de adoecimento, reconhecimento como um bom cuidado, acesso, flexibilidade do horário, divulgação, cartão de vacinas, campanhas de vacinação e disponibilidade de vacinas, e elementos da não imunização: inexperiência dos pais, recusa de aplicações simultâneas de vacinas, assistência fragmentada, ausência de diálogo, discriminação, falsas contraindicações e obrigatoriedade. A imunização centrada no cumprimento do calendário vacinal, ou em situações autoritárias, está descolada do cuidado familiar. O vínculo com as famílias precisa ser fortalecido para ampliação da adesão às medidas de proteção e promoção da saúde da criança.

Concepções e práticas de educação ambiental de professores de uma escola pública

Os dados e análises que apresentaremos neste artigo resultam de investigação sobre a realização de projetos de educação ambiental na escola pública, cujo objetivo principal foi investigar as concepções e práticas de Educação Ambiental de professores que afirmam realizar tais ações. A coleta de dados foi feita por meio de análise documental, entrevistas semi-estruturadas e de observação. As concepções de professores acerca da Educação Ambiental orientam, de certa forma, a maneira como eles interpretam as finalidades atribuídas a ela e o tipo de práticas a que recorrem para alcançá-las. Na investigação feita, constatou-se que essas concepções e práticas eram de natureza comportamental e focavam-se na resolução de problemas de modo pragmático, revelando-se limitadas no desenvolvimento de atividades de Educação Ambiental por meio de projetos.

Effects of phonophoresis with Arnica montana onto acute inflammatory process in rat skeletal muscles: An experimental study

This study aimed at verifying the effects of phonophoresis associated with Arnica montana on the acute phase of an inflammatory muscle lesion. Forty Wistar male rats (300 +/- 50 g), of which the Tibialis Anterior muscle was surgically lesioned, were divided into four groups (n = 10 each): control group received no treatment; the ultrasound group (US) was treated in pulsed mode with 1-MHz frequency, 0.5 W/cm(2) intensity (spatial and temporal average - SATA), duty cycle of 1: 2 (2 ms on, 4 ms off, 50%), time of application 3 min per session, one session per day, for 3 days; the phonophoresis or ultrasound plus arnica (US+A) group was treated with arnica with the same US parameters plus arnica gel; and the arnica group (A) was submitted to massage with arnica gel, also for 3 min, once a day, for 3 days. Treatment started 24 h after the surgical lesion. on the 4th day after lesion creation, animals were sacrificed and sections of the lesioned, inflamed muscle were removed for quantitative (mononuclear and polymorphonuclear cell count) and qualitative histological analysis. Collected data from the 4 groups were statistically analyzed and the significance level set at p < 0.05. Results show higher mononuclear cell density in all three treated groups with no significant difference between them, but values were significantly different (p < 0.0001) when compared to control group's. As to polymorphonuclear cell density, significant differences were found between control group (p = 0.0134) and US, US+A and A groups; the arnica group presented lesser density of polymorphonuclear cells when compared (p = 0.0134) to the other groups. No significant difference was found between US and US+A groups. While the massage with arnica gel proved to be an effective anti-inflammatory on acute muscle lesion in topic use, these results point to ineffectiveness of Arnica montana phonophoresis, US having seemingly checked or minimized its anti-inflammatory effect. (C) 2008 Elsevier B. V. All rights reserved.

Y-TZP ceramic processing from coprecipitated powders: A comparative study with three commercial dental ceramics

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)