Influência da interação dipolar nas fases magnéticas de nanopartículas esféricas com estrutura núcleo@camada

Bi-magnetic core@shell nanoparticle has attracted attention several researchers because great applicability that they offer. The possibility of combining different functionalities of magnetic materials make them a key piece in many areas as in data processing permanent magnets and biomagnetics sistems. These nanoparticles are controlled by intrinsic properties of the core and shell materials as well as the interactions between them, besides size and geometry effects. Thus, it was developed in this thesis a theoretical study about dipolar interaction contribution between materials different magnetic properties in bi-magnetic core@shell nanoparticles conventional spherical geometry. The materials were analyzed CoFe2O4, MnFe2O4 e CoFe2 in various combinations and sizes. The results show that the impact of the core dipole field in the shell cause reverse magnetization early its, before of the core, in nanoparticle of CoFe2O4(22nm)@CoFe2(2nm), thereby causing a decrease coercivity field of 65% in comparection with simple nanoparticle of CoFe2O4 (HC=13.6 KOe) of same diameter. The large core anisotropy in conventional nanoparticle makes it the a stable dipolar field source in the shell, that varies length scale of the order of the core radius. Furthermore, the impact of dipolar field is greatly enhanced by the geometrical constraints and by magnetics properties of both core@shell materials. In systems with core coated with a thin shell of thickness less than the exchange length, the interaction interface can hold reversal the shell occurring an uniform magnetization reversal, however this effect only is relevant on systems where the dipole field effects is weak compared with the exchange interaction.

Influência da interação dipolar nas fases magnéticas de nanopartículas esféricas com estrutura núcleo@camada

Bi-magnetic core@shell nanoparticle has attracted attention several researchers because great applicability that they offer. The possibility of combining different functionalities of magnetic materials make them a key piece in many areas as in data processing permanent magnets and biomagnetics sistems. These nanoparticles are controlled by intrinsic properties of the core and shell materials as well as the interactions between them, besides size and geometry effects. Thus, it was developed in this thesis a theoretical study about dipolar interaction contribution between materials different magnetic properties in bi-magnetic core@shell nanoparticles conventional spherical geometry. The materials were analyzed CoFe2O4, MnFe2O4 e CoFe2 in various combinations and sizes. The results show that the impact of the core dipole field in the shell cause reverse magnetization early its, before of the core, in nanoparticle of CoFe2O4(22nm)@CoFe2(2nm), thereby causing a decrease coercivity field of 65% in comparection with simple nanoparticle of CoFe2O4 (HC=13.6 KOe) of same diameter. The large core anisotropy in conventional nanoparticle makes it the a stable dipolar field source in the shell, that varies length scale of the order of the core radius. Furthermore, the impact of dipolar field is greatly enhanced by the geometrical constraints and by magnetics properties of both core@shell materials. In systems with core coated with a thin shell of thickness less than the exchange length, the interaction interface can hold reversal the shell occurring an uniform magnetization reversal, however this effect only is relevant on systems where the dipole field effects is weak compared with the exchange interaction.

Utilização de jogos no desenvolvimento do sentido espacial

Relatório de Estágio apresentado para obtenção do grau de Mestre na área de Ensino do 1.º ciclo e do 2.º ciclo do Ensino Básico

A escrita da escrita em (d)enunciação no espaço sócio-escolar: um espaço (em vão) para a (cri)atividade escrita

This thesis is a writing of (d)enunciation because it reveals the language experiencies of those individuals who take, in social school space, the social role of the teacher and of the student, for some reason, they feel restrained by a demand which prevents them of teaching and learning how to write – and, even, their own writing. On this basis, we consider some questions concerning Benveniste‘s theory of enunciation and the teaching and learning process in Portuguese from the triad among teacher – teaching of writing/ knowledge – student, making this theoretical area closer to the pedagogical one. We support in the working hypothesis that is based on the position of the loosening of this triad has its effects in the process of intervention-interference to the point where it does not leave a scar which can remain working on productive effects on the student‘s writing. As a consequence, we show two findings which allow us to think the teaching of writing in Portuguese is a space for writing creativity in such a way it reveals itself as a sine qua non condition for the institutionalized and subjective writing. The first finding is that taking genre as a model has some implications in the teaching and learning process of writing according to the instructions of the official documents. The second finding, as a result of the first one, is the assumption that genre is at the same time a model and a transgression and taking it as a (ex)sample opens space for writing creativity which ―is a transposition of the interior language‖ (BENVENISTE, 2014 [1968-1969], p. 132) in a way this creativity makes it intelligible and highlights what is a model (interactiveness) and a transgression (inventiveness). From such findings, we organize our heterogeneous corpus according to these procedures: recording the classes in audio; recording the interviews we made with teachers and students in audio; and constituting an archive with the students‘ writing production. From this corpus, we analyzed the (d)enunciative mo(ve)ments in the teacher – teaching of writing/ knowledge – student triad and the history of (d)enunciations, of language experiences. Besides, we analyzed the teacher‘s discourse in relation to the way he plans his classes based on the knowledge that must be taught and his own way of managing this knowledge in order to understand his interference in his students‘ writings. Our analyses (re)affirm that when the loosening of the triad happens, the students become lost, what makes them unable of working upon their own writing epilinguisticaly. Because of it, schools have lost their specificity as a place for teaching students how to read and write as they open space for training, only. On this basis, we consider that the effect of such a loosening generates complaints and denunciations. Therefore, based on such (d)enunciations, we present the Primary sketches of a proposition for intervention-interference in teaching how to write and we aim at introducing much knowledge to teachers and students in order to allow them to think about possible ways out.

Sexualidade e saúde mental: construindo sentidos entre pessoas usuárias de um CAPS

When expressed by mental health services users, sexuality is typically denied by professionals, viewed as another symptom or as if these people are not capable of practicing it. Once Brazilian health professionals haven’t shown lots of investment in this theme, and few are the studies in this field, it is necessary the attention to be focused on researches involving this public. Therefore, the main goal of this study was understand the meanings of sexuality of the mental health services users, which were negotiated in sexuality workshops. The secondary goals were: a) understand the meanings of themes about sexuality brought by users through their experiences of everyday life; b) to evaluate the facilitating experience of the workshops on sexuality at CAPS. Thus, 10 workshops on sexuality were held, with an average of an hour and twenty minutes each, distributed from December 2014 and April 2015. There were 43 participants, 29 women and 14 men. The meetings had the following central themes: sexuality; sexuality and mental health; myths, beliefs and sexual taboos; gender identity; sexual orientation; sexual and reproductive rights; safe sex; and STD/AIDS. The data collection was through audio-recording of these meetings. Later, was made the transcript of the workshops, a careful reading of these transcripts and then its analysis. It was identified categories to analyze the interfaces that permeate the focus of the study. Initially, the categories relating to mental health and sexuality: meanings about sexuality; gender issues; gender and religion; sexual rights, STD/AIDS prevention and attention or denial of sexuality at CAPS. Later, those relating to the workshops facilitating process: challenges in facilitating the workshops; and the perception of the participants. A variety of meanings about sexuality could be noticed in the users’ statements, relating it more with affection and respect than with intercourse. The gender issues that emerged during the workshops were related to marital relationship, sexism, domestic violence, psychological violence and male and female roles in society. Moreover, were also revealed some situations that associated gender differences with religious issues, such as the submission of women and homosexuality. It was also noticed some experiences of the participants involving worrying situations of family violence, suicidal ideation and chemical castration, were often mismanaged or ignored by the service professionals. With regard to the facilitation of the workshops, it was possible to legitimize it as places where users were able to talk openly about the suggested themes and highlight its importance to the study site. Besides, it’s possible to list a few challenges of its facilitation in a mental health service, which was in general positively evaluated by the participants. Thus, the research highlights the need for sexuality theme discussion in mental health services, in order to understand, discuss and inform the users. Also, it’s important to problematize the stigma created in the theme relation with the users, the professionals and the society, working its specificities and avoiding a pathological bias.

O conceito de motivação em dizeres de professores de língua inglesa

This work aimed at analyzing the speeches constructed about motivation by English teachers who teach at public state schools in the interior of Minas Gerais. We aimed at delineating the concept of subject underlying the subjects’ notion of motivation and identifying the role that the English teacher attributes to himself and to the student when he/she enunciates on motivational issues, problematizing the possible consequences of these issues for some English teachers while working in public schools. In order to do so, our investigation made use of theoretical assumptions from Applied Linguistics and Discourse Analysis. The theoretical fundamentation deriving from Bakhtin Circle as well as from Michel Pecheux’s theoretical basis were also very relevant for this research. The intersection of these studying fields entails a theoretical construction that considers the voices of those who live the social practice (MOITA LOPES, 2006), which allows one to see the subjects through their heterogeneity, fluidity and fragmentation. Moreover, it generates knowledge about language in its political, ideological, social and historical aspects. AREDA (SERRANI, 1998) was used as a theoretical and methodological framework for data collection. In our analysis, we considered the voices and the conditions of production that constitute 5 English teachers and, from some selected speeches extracted from their discursive production, some notions as intra and interdiscourse, discursive resonance, discursive memory, among others, can be seen interwoven. We hypothesize that the production of meaning deriving from these English teachers comes from a cleavage between the interdiscursivity about motivation and their position in relation to the English language. Some of these teachers’ discursive inscriptions were delineated as they follow: i) the silenced motivation, in which the teachers come up with several voices, repeating what that has already been said about motivation through silence by excess; also, through an inscription in a process of anomy, the English teachers silence motivation, as they come up with other sayings, in an anomic order, denying their identification with their mother tongue and culture because of a desire to learn the foreign language and culture; ii) the motivation in/from/ by others that resounds, in the way the teachers speak, a relation of alterity on what, in/from desire of other relations (colleagues, students, teaching materials, media, etc.), other forms and alternatives are established as a guarantee of students’ motivation; the teachers are also inscripted in in-service practice training as a space of educational development, because they imagine that the experience of the in-service practice alone, which excludes the educational instruction from the Languages course in which they graduated/were graduating at, taught them how to motivate the students; iii) the motivation as a will of power/knowledge, which means there seems to be teachers’ inscription in the relationship between power and knowledge (Foucault, 1996), disconsidering the conflicts that constitute the English classroom to say that there is a control of the English teaching and learning process and, as a result, they also sustain that they hold control over how to motivate; furthermore, the presence of a resonant voice, whose effect is given by an inscription on the (illusion of) completeness can be seen, because the English teachers believe that while motivating their students, this motivation will provide them with all the missing elements, which would mean that when they motivate students, they would be able to fulfill all the gaps in their learning process.

Luz e vida: uma proposta de formação continuada de professores

The Course “Light and Life”, which is a product of the present research, is a mediator in helping Science Teachers on how to deal with the Physics classes in secondary school. The aim of the present study was to propose a course which can help Science Teachers with their difficulties in the teaching of Physics in the later years of secondary school, mainly about topics related to the theme Light. The elaboration of the product of this research involved structuring and applying a course of continued formation through the “Fun with Science and Art Museum-DICA, under the theme Light, to Science Teachers of the later years of secondary school, in order to promote an environment of dialogue and problem raising as means of disseminating and discussing the teaching of topics related to Light in the teaching of Sciences. The formation course presented a flexible structure in order to widen the relation between the researcher and the teachers participating in the course, aiming to give an answer to the formative needs of the teachers in relation to the theme proposed. In order to know and discuss the problems and challenges of the teaching of Physics in the Science classes, an approach of insertion and integration of concepts related to the theme Light was conducted, mainly on topics relating to the contents of Physics, Chemistry and Biology, according to the curriculum and the abilities of Sciences worked on in class, through the approach of concepts and practice which approximate the practical and theoretical reality of the formative needs of the teachers involved in this study. This work aimed to understand the relation of Science Teachers with the theme Light and comprehend the relation of the teachers with the present proposal of continued formation promoted by the Museum DICA. The methodological option of this research remained in the domains of qualitative research whose analysis was based on the content analysis. The data collection was carried out through questionnaires and group discussions recorded in audio, besides the participative observation of the researcher. As the research product, the structuring and application of a course of continued formation of Science Teachers of secondary school was proposed, under the thematic Light, and a later restructuring of the course under the same thematic based on the data collected after the application of the referred course, which will be later promoted by the Museum DICA.

Das saudades que se tem: a representação paterna na escrita autobiográfica de Bartolomeu Campos de Queirós

In our work, we analyze some works of Bartolomeu Campos de Queirós that compose the “autobiographical cycle”, especially those ones that bring the image of father’s absence/presence, the relationship between life and writing, as well as the father’s figurations and his intermediates and substitutes. We especially investigated the aspect of repetition about how the family relations are articulated, highlighting those ones that happen between father and son and that appear in these texts. This problematic interested us as a research object, a priori, because the works of Bartholomeu Campos de Queirós are an exponent of literature for children field, as far as they show that the childhood is not always “colorful”, happy and perfect as several productions supposedly made “for children” seek to have us believe. In addition, the selected texts that have an autobiographical characteristic and put the issue of child suffering because of the father’s absence are configured as a very rich corpus for studies related to the relation between life/work and investigations in the dialogue between Literature and Psychoanalysis. These aspects will permit us to understand why the pain of missing father be repetitive and insistent in these books. Thus, we problematize, by the selected works for this study, the concept of literature for children and young people and the notion of literary reading. We also analyzed in the “statements” given by the author the relationship between life and writing and we investigated, based on psychoanalytic studies, the literary writing as a possibility of both unconscious development of memory marked by the father’s absence – remedy – as of a perpetuation of this same conflict – poison. Furthermore, we analyzed how the relationship between son and father are processed considering the mother’s absence, since the works that have this person’s presence, she seems to mediate such relationships in a certain way.

Contributos para a participação e aprendizagens de mulheres reformadas da Batalha

O estágio investigativo foi desenvolvido na Associação Cultural, Recreativa, Desportiva e Social Artelemniscata - Arte Sem Fim, no Concelho da Batalha e teve como destinatários a população reformada do mesmo concelho. O objetivo do estágio centra-se em conhecer a comunidade do concelho da Batalha para, de uma forma mais concreta, favorecer o desenvolvimento de diversas atividades socioculturais e educativas possibilitando uma participação ativa das pessoas reformadas nas dinâmicas comunitárias locais. Para tal, a metodologia centra-se numa abordagem qualitativa, em que foram usadas como principais técnicas de investigação/intervenção a entrevista semiestruturada, e o inquérito por questionário. O grupo que se constituiu para a realização das atividades socioculturais e educativas foi de sete (7) seniores, mulheres, de idades entre os 77 e os 59 anos, residentes em aldeias vizinhas do Concelho da Batalha. Realizaram-se quatro (4) atividades que foram ao encontro dos interesses e motivações das idosas. As atividades centraram-se em áreas como: exercício físico, artes plásticas, informática e culinária. Concluiu-se que as participantes se sentiram satisfeitas com a participação nas atividades. Partindo dos depoimentos das próprias, contatou-se que, através das atividades, descobriram capacidades que desconheciam ter, tiveram acesso a novas experiências que, inclusivamente, contribuíram para o seu bem-estar.

A cultura organizacional influenciando o comportamento do capital humano na biblioteca universitária

DUARTE, E. N. ; CARVALHO, Andréa Vasconcelos ; PINHEIRO, E. G. ; CARVALHO, Luciana Moreira ; NOGUEIRA, N. M. F. . A cultura organizacional influenciando o comportamento do capital humano na biblioteca universitária. Informação & Sociedade. Estudos, João Pessoa - PB, v. 10, n. 2, p. 190-210, 2000

Literaturas africanas de expressão portuguesa : o movimento da claridade

Enquadramento do movimento e da revista Claridade. Constituição do grupo. Suas principais obras. Incidências socio-históricas na estética do grupo. Principais vertentes temáticas. Depoimentos do escritor Manuel Lopes, da investigadora Elsa Rodrigues dos Santos e do Professor Alberto Carvalho.

Avaliação da política pública de acessibilidade no período de 1992 a 2002 na Cidade do Natal

Este estudio tiene como objetivo evaluar los avances y límites de las políticas de accesibilidad en la ciudad de Natal. Se investigan las políticas publicas municipales de accesibilidad implantadas en los diez años subsecuentes, a partir de la sanción de la Ley Municipal de Accesibilidad Nº 4.090 del 03 de junio de 1992, que torna obligatorio la eliminación de las barreras arquitectónicas para personas con discapacidades en los lugares de circulación de peatones y edificios de uso público de la ciudad. Accesibilidad, en los proyectos de arquitectura y urbanismo es la condición esencial para asegurar a cualquier ciudadano su derecho a ir y venir con seguridad, dignidad y autonomía. Esta investigación se concentra en los barrios de: ciudad alta, Petrópolis y Ribeira, ya que esta área, en el período ya mencionado, fue la que tuvo una mayor concentración del presupuesto de inversiones públicas municipales de la ciudad de Natal, en la eliminación de barreras arquitectónicas en vías urbanas. El método adoptado fue el hipotético deductivo, a partir de la formulación de dos hipótesis de trabajo: la primera, una divergencia entre los objetivos propuestos por la Ley Nº 4.090 y sus aplicaciones prácticas y, la segunda, de las diferencias que existen en el grado de entendimiento del concepto de accesibilidad, para eso, se realizó una colecta y análisis de datos tanto empíricos como teóricos. Este estudio también retrata en el año de 2004, con el uso de la técnica de la fotografía, la realidad actual de la ciudad sirviendo como un parámetro comparativo con los proyectos asociados a la Coordinación para integración de las personas con discapacidades. Se utiliza la técnica de entrevista con especialistas en accesibilidad envueltos a lo largo del proceso de implantación de las políticas públicas en la ciudad de Natal, durante los años mencionados, obteniendo así un testimonio sobre las directrices adoptadas en ese período, con base en la legislación vigente. En la investigación documental y fotográfica se realiza una evaluación de la dimensión real de lo propuesto y ejecutado en un periodo de diez años, y se concluye sobre todos los avances y retrocesos de las políticas de gestiones públicas adoptadas con relación a la accesibilidad en la ciudad de Natal

Context-awareness privacy in data communications

Internet users consume online targeted advertising based on information collected about them and voluntarily share personal information in social networks. Sensor information and data from smart-phones is collected and used by applications, sometimes in unclear ways. As it happens today with smartphones, in the near future sensors will be shipped in all types of connected devices, enabling ubiquitous information gathering from the physical environment, enabling the vision of Ambient Intelligence. The value of gathered data, if not obvious, can be harnessed through data mining techniques and put to use by enabling personalized and tailored services as well as business intelligence practices, fueling the digital economy. However, the ever-expanding information gathering and use undermines the privacy conceptions of the past. Natural social practices of managing privacy in daily relations are overridden by socially-awkward communication tools, service providers struggle with security issues resulting in harmful data leaks, governments use mass surveillance techniques, the incentives of the digital economy threaten consumer privacy, and the advancement of consumergrade data-gathering technology enables new inter-personal abuses. A wide range of fields attempts to address technology-related privacy problems, however they vary immensely in terms of assumptions, scope and approach. Privacy of future use cases is typically handled vertically, instead of building upon previous work that can be re-contextualized, while current privacy problems are typically addressed per type in a more focused way. Because significant effort was required to make sense of the relations and structure of privacy-related work, this thesis attempts to transmit a structured view of it. It is multi-disciplinary - from cryptography to economics, including distributed systems and information theory - and addresses privacy issues of different natures. As existing work is framed and discussed, the contributions to the state-of-theart done in the scope of this thesis are presented. The contributions add to five distinct areas: 1) identity in distributed systems; 2) future context-aware services; 3) event-based context management; 4) low-latency information flow control; 5) high-dimensional dataset anonymity. Finally, having laid out such landscape of the privacy-preserving work, the current and future privacy challenges are discussed, considering not only technical but also socio-economic perspectives.

Mobilidade urbana sustentável em projetos estruturantes: analise urbanística e ambiental do corredor de transporte da Avenida Bernardo Vieira Natal/RN

The search for a sustainable urban mobility, has recast the public policy of transport and movement for all, in order to contribute to the welfare economic, social and environmental. Within this context, has as its main objective review here in the city of Natal in the state of Rio Grande Norte, the deployment of the new road infrastructure of the transport corridor of Bernardo Vieira Avenue and checking at least with regard to urban areas and environmental chosen here, as will indicators to assess sustainable urban mobility, that the theory has been well constructed, but in practice little way to apply the proposed guidelines for sustainability. To achieve this result, is initially a literature review with the principal investigators of the matter, since the concepts of indicators of sustainable urban mobility. And a second time, participating in to the case study, using the methodology of environmental awareness, through analysis photographs, notes and testimony in the study area ace to reach conclusions

Percepção Ambiental em Museus Paisagens de Arte Contemporânea: a legibilidade dos museus Inhotim/Brasil e em Serralves/Portugal avaliada pelo público/visitante

This thesis nalyzes the wayfinding in Landscape Museum of Contemporary Art (MPAC), based on the Institute of Contemporary Art CACI, Minas Gerais, Brazil and the Museum of Contemporary Art of the Serralves Foundation, Porto, Portugal. The study focuses on the interrelationship of the public/visitors with the landscape, architecture and contemporary art museums in these, in order to understand visual perception and apprehension of such an environment for their users. For both were confronted documentation (visual and written) and people talk. The main hypothesis put forward is that the audience/visitor MPAC appreciates the interrelationship between the natural environment (park/garden) and built environment (the works of contemporary art and the galleries), giving equal value to both. To complement this, a second hypothesis is that during the visit to MPACS, visitors define their paths spontaneously, but strongly influenced by existing visual indicators (maps, signage and striking landscape elements), which facilitate the readability of space, which also contribute to the offered services and the experiences of similar institutions. The analytical basis of the research used the concepts of legibility (LYNCH, 2009), wayfinding (GIBSON, 2009; ARTHUR, PASSINI, 2002; WEISMAN, 1982), Experiential Cotinnum (TUAN, 1985), Space Bound (CRUZ PINTO, 2007) and habitus (BOURDIEU, 1992). Methodologically was used qualitative research (DEMO 2000) by means of a case study (YIN, 2005; STAKE, 1999) and participant observation (WHYTE, 2005). In the two institutions interviews with researchers and curators, behavior observation and questionnaires from employees, trainees, monitors and the public/visitor of the two museums were performed. Although partially referende the initial hypothesis, the research showed that the public/visitor value appears more natural environments, they experience a greater intensity and in addition to the factors listed in the second case, your perception and definition of paths suffer significant influence of emotional relations established with space. Generally the audience/visitor adapts easily to different demands of contemporary art exhibition in the two museums and the built environment (park/garden and museum) interferes with your reading path during the visit, perceived by the public/visitor condition as a factor that favors the enjoyment of works on different mounts (wayfinding), though often become a factor that hinders the legibility of the building and its built environment