Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-06-15T00:10:32Z No. of bitstreams: 1 FranciscoCleitonVieiraSilvaDoRego_DISSERT.pdf: 2705933 bytes, checksum: 88e89b8f22a3c54377529c42d32df520 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-17T22:08:00Z (GMT) No. of bitstreams: 1 FranciscoCleitonVieiraSilvaDoRego_DISSERT.pdf: 2705933 bytes, checksum: 88e89b8f22a3c54377529c42d32df520 (MD5) / Made available in DSpace on 2016-06-17T22:08:00Z (GMT). No. of bitstreams: 1 FranciscoCleitonVieiraSilvaDoRego_DISSERT.pdf: 2705933 bytes, checksum: 88e89b8f22a3c54377529c42d32df520 (MD5) Previous issue date: 2015-11-25 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Esta pesquisa busca entender como homens trans constroem suas identidades e vivenciam a experi?ncia transexual nas rela??es que estabelecem cotidianamente para entrada na categoria homem . Foi poss?vel perceber que para isso engendram uma transi??o de g?nero espec?fica em meio a transexualidade masculina. Apesar de estarem sob um am?lgama complexo de rela??es de explora??o e domina??o disciplinares, formas de ser homem s?o agenciadas para uma viv?ncia e entrada nos espa?os onde s?o expulsos por n?o conformarem os corpos que as normas de g?nero demandam. Compreende-se que a transi??o de g?nero ? um processo ao mesmo tempo de manejo org?nico e prot?tico do corpo e de assun??o da pr?pria identidade. Com isso, constroem uma pol?tica de identidade que fixa criativamente uma categoria de pessoa detentora de direitos. A transi??o trata, portanto, de transicionar de uma inexist?ncia a um lugar de humanidade. A disserta??o descreve como esse processo se realiza nas experi?ncias dos interlocutores, observando as pr?ticas de fazer emergir o masculino diante de posi??es de classe quanto ao mercado de trabalho, ao acesso a sa?de, a hormorniza??o e a pr?pria identidade. Desse modo, teorias que os fixem como expressando masculinidades femininas ou marginais ? hegemonia n?o encontram exatid?o em suas vidas. A pesquisa partiu metodologicamente da realiza??o de etnografias multissituadas em diferentes meios que deram espa?o a entrevistas em profundidade com 14 interlocutores provenientes do Nordeste, Centro-Oeste, Sudeste e Sul do Brasil. Entre os anos de 2014 e 2015, partindo da aplica??o de t?cnica de rede ?s primeiras interlocu??es em pesquisa, p?de-se construir uma observa??o participante junto ao cotidiano de homens trans, de suas atividades privadas, p?blicas em meio a um coletivo de ativismo trans no Nordeste, e ao acompanhamento de a??es nas quais estiveram envolvidos durante o XII Encontro Nacional em Universidades de Diversidade Sexual e de G?nero (ENUDSG) realizado em Mossor?/RN. Dessa forma, o trabalho tenta descrever e compreender as diferentes formas de construir as transi??es de g?nero de homens trans no acesso ? transexualidade e, portanto, a uma forma de explicar as pr?prias trajet?rias em termos de pessoas que existem enquanto tais, em meio a narrativas marcadas por emo??es ligadas ao n?o viver , ao sofrimento e desumaniza??o. / This work seeks to understand how trans men build their identities and live the transsexual experience in the relationships they establish daily onto ?man? category. It could be observed that for it they engenders a specific gender transition in the midst of male transsexuality. Despite being under a complex amalgam of relations of exploitation and disciplinary domination, ways of being man are brokered for a living and entry into spaces where they are expelled for not conform the bodies that gender norms require. It is understood that gender transition is a process at the same time of organic and prosthetic body management and the assumption of your own identity. Thus, they build a politic of identity that creatively fixes a person's category as rights holder. The "transition" is therefore to transact from nonexistence to a place of humanity. This dissertation describes how this process takes place in the experiences of the speakers, observing the practices that bring out the male, front of class positions on the labor market, access to health, hormonization and own identity. Thereby, theories that fix them as expressing female masculinities or marginal to the hegemony do not find exactitude in their lives. The research methodologically started performing "multilocated ethnographies" that gave possibilities to in-depth interviews with 15 stakeholders from the Northeast, Midwest, Southeast and South of Brazil. Between 2014 and 2015, from the applying of network technique to the first dialogues in research, it was possible to build a participant observation by the trans men?s everyday life. Wherewith I was capable to behold their own private activities, as well as their public agency amid a trans activism collective in northeast, and the follow-up actions in which they were involved during the XII Encontro Nacional em Universidades de Diversidade Sexual e de G?nero (ENUDSG) held in Mossor?/RN. Therefore, the thesis engages to describe and understand the different ways of constructing trans male gender transitions in access to transsexuality and therefore a way of explaining their own trajectories in terms of people that exist as such, even though in the midst of narratives marked by emotions linked to "not live", to suffering and dehumanization.

Made available in DSpace on 2014-12-17T15:14:54Z (GMT). No. of bitstreams: 1 CarlosAPA_DISSERT.pdf: 1792164 bytes, checksum: c068b57b0c1bbf2aae1fd72062ef9b14 (MD5) Previous issue date: 1999-08-06 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / In this work we have studied, by Monte Carlo computer simulation, several properties that characterize the damage spreading in the Ising model, defined in Bravais lattices (the square and the triangular lattices) and in the Sierpinski Gasket. First, we investigated the antiferromagnetic model in the triangular lattice with uniform magnetic field, by Glauber dynamics; The chaotic-frozen critical frontier that we obtained coincides , within error bars, with the paramegnetic-ferromagnetic frontier of the static transition. Using heat-bath dynamics, we have studied the ferromagnetic model in the Sierpinski Gasket: We have shown that there are two times that characterize the relaxation of the damage: One of them satisfy the generalized scaling theory proposed by Henley (critical exponent z~A/T for low temperatures). On the other hand, the other time does not obey any of the known scaling theories. Finally, we have used methods of time series analysis to study in Glauber dynamics, the damage in the ferromagnetic Ising model on a square lattice. We have obtained a Hurst exponent with value 0.5 in high temperatures and that grows to 1, close to the temperature TD, that separates the chaotic and the frozen phases / Neste trabalho estudamos, atrav?s de simula??es computacionais de Monte Carlo, v?rias propriedades que caracterizam a propaga??o de danos no modelo de Ising, definido em redes de Bravais (quadrada e triangular) e na junta de Sierpinski (que ? um arranjo fractal). Inicialmente, investigamos o modelo antiferromagn?tico na rede triangular com campo magn?tico uniforme, atrav?s da din?mica de Gl?uber; a fronteira cr?tica ca?tica-congelada que obtivemos coincide, dentro dos limites de precis?o num?rica, com a fronteira paramagn?tica-ferromagn?tica da transi??o est?tica. A seguir, estudamos o modelo ferromagn?tico na junta de Sierpinski, por meio da din?mica de heat-bath; mostramos que existem dois tempos que caracterizam a relaxa??o do dano: um deles satisfaz ? teoria de escala generalizada proposta por Henley (expoente cr?tico z ~ A/T, para baixas temperaturas) enquanto o outro tempo n?o obedece nenhuma das teorias de escala conhecidas. Finalmente, utilizamos m?todos de an?lise de s?ries temporais para estudar o dano na din?mica de Gl?uber no modelo de Ising ferromagn?tico em rede quadrada: Obtivemos um expoente de Hurst que vale 0,5 em altas temperaturas e que cresce, tendendo para um valor 1, ? medida que T se aproxima de To, que ? a temperatura que separa as fases ca?tica e congelada

Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2016-01-25T23:08:09Z No. of bitstreams: 1 Disserta??o de Milena Rodrigues - PPGE - UEFS .pdf: 1087289 bytes, checksum: 8b01def2b023a023f5899132acceb316 (MD5) / Made available in DSpace on 2016-01-25T23:08:09Z (GMT). No. of bitstreams: 1 Disserta??o de Milena Rodrigues - PPGE - UEFS .pdf: 1087289 bytes, checksum: 8b01def2b023a023f5899132acceb316 (MD5) Previous issue date: 2015-08-28 / Funda??o de Amparo ? Pesquisa do Estado da Bahia - FAPEB / This research focuses on understanding the life trajectories of young people linked to the african-Brazilian religions of the Bonfim de Feira district from crossings social, cultural and religious that circumscribe their ways of life. The work has outlined in order to broaden the discussions on the topic of youth, enhancing the look and the voice of young people in approaching with their own social experiences. Thus, the theoretical categories were addressed: youths and trajectories concomitantly with the concepts of temporality and transitions. the theoretical categories religiosity and belonging were also discussed, seeking to evidences how these two dimensions are articulated in the configuration of hybrid identities. The methodology adopted was of qualitative nature and the cartographic method was chosen as research strategy, focusing on the interactions with the place (Bonfim de Feira) and the subjects, in the apprehension of intersubjective processes between the researcher and the researched. The analysis of narrative interviews were organized so as to highlight the singularities present in each trajectory of young people interviewed as well as show discussions about the transition from the common aspects of their careers such as school, work, employability, community experiences, cultural and religiosity. Thus, this research has allowed us to understand that young people are inserted in a context marked by strong cultural and religious tradition, that offer to them anchors in preparing for the future. They Experience tensions in the relationship between school and work, migrate and stay, while seeking to negotiate other forms of sociability as well as reinventing forms of belonging and to give continuing to the traditions of the place. / A presente pesquisa tem como foco compreender as trajet?rias de vida dos jovens vinculados ?s religi?es afro-brasileiras do distrito de Bonfim de Feira a partir dos atravessamentos sociais, culturais e religiosos que circunscrevem seus modos de vida. O trabalho delineou-se com vistas a ampliar as discuss?es sobre a tem?tica da juventude, valorizando o olhar e a voz dos jovens na aproxima??o com as suas pr?prias viv?ncias sociais. Sendo assim, foram abordadas as categorias te?ricas: juventudes e trajet?rias concomitantemente com os conceitos de temporalidade e transi??es. As categorias te?ricas religiosidade e pertencimento tamb?m foram abordadas, buscando-se evidenciar como estas duas dimens?es articulam-se na configura??o das identidades h?bridas. A metodologia adotada foi a de cunho qualitativo e o m?todo cartogr?fico foi escolhido como estrat?gia investigativa, focando sobre as intera??es com o lugar (Bonfim de Feira) e os sujeitos, na apreens?o dos processos intersubjetivos entre a pesquisadora e os pesquisados. As an?lises das entrevistas narrativas foram organizadas de modo a evidenciar as singularidades presentes em cada trajet?ria dos jovens entrevistados, bem como apresentar discuss?es acerca das transi??es a partir dos aspectos comuns de suas trajet?rias tais como escolariza??o, trabalho, inser??o profissional, vivencia comunit?ria, cultural e religiosidade. Assim, esta pesquisa nos permitiu compreender que os jovens est?o inseridos dentro de um contexto marcado por uma forte tradi??o cultural e religiosa, que lhes oferecem ancoragens na prepara??o para o futuro. Vivenciam tens?es na rela??o entre escola e trabalho, o migrar e o ficar, ao mesmo tempo em que buscam negociar outras formas de sociabilidade, bem como reinventam formas de pertencer e de dar continuidade ?s tradi??es do lugar.

Submitted by Caroline Xavier (caroline.xavier@pucrs.br) on 2017-08-07T13:36:00Z No. of bitstreams: 1 DIS_OTAVIO_CANOZZI_CONCEICAO_COMPLETO.pdf: 1480241 bytes, checksum: 6c742bea6a2e5e1360c0f6751123d488 (MD5) / Made available in DSpace on 2017-08-07T13:36:00Z (GMT). No. of bitstreams: 1 DIS_OTAVIO_CANOZZI_CONCEICAO_COMPLETO.pdf: 1480241 bytes, checksum: 6c742bea6a2e5e1360c0f6751123d488 (MD5) Previous issue date: 2017-03-23 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The present dissertation evaluates the Science without Borders program focusing on three outcome variables. To achieve this goal, the work is divided into two essays. The first essay addresses the causal impact of the program on the performance of CsF alumni from the 2013 National Student Performance Exam (ENADE) microdata. The results are compared with two control groups: the first composed by students who also made international academic mobility, but through other initiatives and the second by the non-exchange students. The strategy of comparing the CsF?s alumni with the exchange students aims to mitigate the problems of self-selection, because we can expect more similar characteristics between these groups, both with regard to motivation to study abroad and observable characteristics. The methodology used was the Propensity Score Matching (PSM), using different pairing algorithms to check the validity of the findings. The results show that the alumni of the program present better grades than the exchange students, both in the general formation part and in the specific component of the ENADE exam. The second essay examines dropout and completion rates in the CsF students? course from the microdata of the Higher Education Census of 2014 and 2015. For this purpose, a panel of students was constructed, divided into the same groups of the first essay, which allowed to identify their trajectories in the course. The methodology used involved two techniques: a multinomial logit and the Markov transition matrices. The evidence found shows that CsF students evades more the course and conclude it at lower rates in the expected time, according to the serial grade of the course, than both comparison groups. The results of the multinomial logit model, controlling characteristics of individuals, institutions, courses and regions, suggest that the program has a ceteris paribus effect on the extension of student time in the university. / A presente disserta??o avalia o programa Ci?ncia Sem Fronteiras (CsF) com foco em tr?s vari?veis de resultado. Para atingir esse objetivo, o trabalho est? dividido em dois ensaios. O primeiro ensaio trata do impacto causal do programa sobre o desempenho dos ex-bolsistas do CsF a partir dos microdados do Exame Nacional de Desempenho dos Estudantes (ENADE) de 2013. Os resultados s?o analisados comparativamente a dois grupos de controle: o primeiro composto por estudantes que tamb?m realizaram interc?mbio acad?mico internacional, por?m por interm?dio de outras iniciativas e o segundo por n?o intercambistas. A estrat?gia de compar?-los com os intercambistas visa mitigar os problemas de autossele??o, porque se espera caracter?sticas mais semelhantes entre esses grupos, tanto no que tange ? motiva??o para estudar no exterior quanto em caracter?sticas observ?veis. A metodologia empregada foi o Propensity Score Matching (PSM), sendo utilizados diferentes algoritmos de pareamento para conferir validade aos achados. Os resultados revelam que os ex-bolsistas do programa apresentam melhores notas que os intercambistas, tanto na parte de forma??o geral quanto no componente espec?fico da prova do ENADE. O segundo ensaio analisa a evas?o e a taxa de conclus?o no curso de alunos do CsF a partir dos microdados do Censo da Educa??o Superior de 2014 e 2015. Para tanto, construiu-se um painel de estudantes, divididos de acordo com os mesmos grupos do primeiro ensaio, que permitiu identificar suas trajet?rias no curso. A metodologia utilizada envolveu duas t?cnicas: um logit multinomial e as matrizes de transi??o de Markov. As evid?ncias encontradas mostram que os alunos do CsF trancam mais o curso e se formam a menores taxas no tempo esperado, de acordo com a grade seriada do curso, do que ambos os grupos de compara??o. Os resultados do modelo logit multinomial, controlando caracter?sticas dos indiv?duos, das institui??es, cursos e regi?es, sugerem que o programa tem um efeito ceteris paribus sobre a prorroga??o do tempo do aluno na universidade.

Made available in DSpace on 2014-12-17T15:41:48Z (GMT). No. of bitstreams: 1 AngelaMFC_DISSERT.pdf: 3041149 bytes, checksum: da19cf62f4f0b41c6e086f7a2d3bd1ab (MD5) Previous issue date: 2010-08-21 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / In this work the organosilanes aminopropyltriethoxysilane, 3-mercaptopropyltryethoxisilane and n[-3-(trimetoxisilyl)propyl]ethylenetriamine, as well as tetraethylortosilicate (TEOS), were employed to produce, by sol-gel method, organofuncionalized silicon samples. The prepared samples were characterized by elementar analys by thermogravimetry and infrared spectroscopy. Those samples were employed to adsorb Cd2+, Pb2+, Ni2+ and Zn2+ from aqueous solutions (10, 20, 40, 60 and 80 mg L-1). In typical experiments, 50 mg of the organometrix was suspended in 20 mL of metal cation solutions at four different contact times: 30, 60, 90 and 120 minutes. The total amount of adsorbed cations were measured by atomic absorption spectrometry. To all investigated matrices, the following adsorption capacity was observed: Ni2+ > Zn2+ > Cd2+ > Pb2+. Such sequence is closely related with the cation radius, as well as the cation hardness / No presente trabalho, cinco matrizes de s?lica organofuncionalizadas foram sintetizadas com os agentes sililantes aminopropiltrietoxisilano, 3-mercaptopropiltrietoxissilano e n[-3- (trimetoxissilil)propil]etilenotriamina. As matrizes h?bridas foram sintetizadas e caracterizadas por an?lise elementar, por an?lise t?rmica e espectroscopia na regi?o do infravermelho. Ap?s sua caracteriza??o as matrizes foram utilizadas como adsorventes para as esp?cies qu?micas Cd2+, Pb2+, Ni2+ e Zn2+ em solu??o aquosa. Para os testes utilizou-se 50 mg de cada matriz h?brada de s?lica-gel organofuncionalizada para adsor??o dos ?ons em solu??o aquosa com concentra??es de 10, 20, 40, 60 e 80 mg L-1. Os tempos de contato foram de 30, 60, 90 e 120 min, nos quais as misturas eram mantidas sob agita??o. Decorrido cada tempo, as concentra??es de equil?brio eram determinadas a partir de medidas de espectrometria de absor??o at?mica. A partir dessas medidas foi poss?vel determinar a quantidade de ?ons adsorvidos para cada um dos elementos em estudo e relacionar essas quantidades em rela??o ao tempo de contato e ao tipo de matriz. Para todas as matrizes investigadas seguiu-se a ordem de adsor??o: Ni2+ > Zn2+ > Cd2+ > Pb2+. A sequ?ncia de adsor??o ocorre de acordo como raio e dureza do c?tion

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2017-04-24T14:13:26Z No. of bitstreams: 1 2012 - Ana Carolina Bello de Souza.pdf: 1911170 bytes, checksum: 62c70571aeb2100b8313dc1ef44eac2b (MD5) / Made available in DSpace on 2017-04-24T14:13:26Z (GMT). No. of bitstreams: 1 2012 - Ana Carolina Bello de Souza.pdf: 1911170 bytes, checksum: 62c70571aeb2100b8313dc1ef44eac2b (MD5) Previous issue date: 2012-10-03 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / In this work, the theoretical study of the gas-phase bimolecular nucleophilic substitution reaction, CH3Cl + OH- CH3OH + Cl-, is introduced, aiming the description of the potential energy surface, the calculation of rate constants and the investigation of the effect of increasing the side chain (changing the CH3 radical in the reaction cited above by the radicals ethyl, n-propyl, i-propyl, n-butyl, s-butyl e t-butyl). The theoretical calculations have been first performed at the MP2/6-31+G(d) level for the geometry optimizations and vibrational frequencies calculations. Single point calculations at the CCSD(T)/6-31+G(d) level have also been performed in order to improve the total energies for the stationary points. However, the relative energies of these stationary points at both MP2 and CCSD(T) level shown close results, so that the single point calculations at the CCSD(T) level have not been proved strictly necessary and have therefore not been performed for all the points along the potential energy surface. The minimum energy path has been described by the intrinsic reaction coordinate method, calculated at the MP2/6-31+G(d) by performing sequential geometry optimizations starting from the saddle point. The calculated enthalpy difference at 298K for the reaction has been determined as -49.5 kcal/mol, in good agreement with the literature value: -50.5 kcal/mol. The calculated rate constant has been obtained as 1.41 x 10-9 cm3.molecule-1.s-1, at 298,15K, in excellent agreement with the experimental data: 1.3 ? 1.6 x 10-9 cm3.molecule-1.s-1.Moreover, the rate constants show non-Arrhenius behavior, decreasing as the temperature increases, which is consistent with the experimental expectation. In this way, the performance of the variational transition state theory for this reaction can be considered satisfactory. By increasing the side chain of the reactant, other reaction channels have been observed: the bimolecular elimination E2 channel and the attack of the nucleophile from the same plane of the exit group (the front-SN2).For these reactions of the alkyl chlorides on n carbon atoms (1 < n ? 4), the B3LYP/6-31+G(d,p) level has been adopted for geometry optimizations and vibrational frequencies. Then, single point calculations at the CCSD(T)/6-31+G(d,p)//B3LYP/6- 31+G(d,p) level have been performed. A comparison of the reaction channels, back- SN2 and E2, shows that the E2 channel is kinetically favored, whereas the SN2 products are thermodynamically more stable. As expected, high values for the potential height have been observed for the front-SN2, being these channels disfavored in all cases. In general, the energy of the saddle points in respect to the isolated reactants slightly depend upon the size of the side chain. / Este trabalho trata do estudo te?rico das rea??es de substitui??o nucleof?lica de segunda ordem, CH3Cl + OH- CH3OH + Cl-, em fase gasosa, visando estudar a superf?cie de energia potencial, obter as constantes de velocidade e ainda verificando o efeito do aumento da cadeia lateral (trocando o radical CH3 na rea??o descrita acima por radicais etil, n-propil, i-propil, n-butil, s-butil e t-butil). Primeiramente, c?lculos te?ricos para otimiza??es de geometria e frequ?ncia foram realizados em n?vel MP2/6-31+G(d) para a rea??o CH3Cl + OH- CH3OH + Cl- e, em seguida, c?lculos single-point em n?vel CCSD(T)/6-31+G(d) foram realizados para corrigir os valores da energia eletr?nica dos pontos estacion?rios obtidos no caminho de rea??o. Entretanto, os valores obtidos para as energias relativas em n?veis MP2 e CCSD(T) foram muito pr?ximos, n?o sendo estritamente necess?rio refinar,atrav?s de c?lculos single-point em n?vel CCSD(T)/6- 31+G(d),os valores de energia de todos os pontos obtidos na superf?cie de energia potencial. O caminho de rea??o menor energia foi descrito pela coordenada de rea??o intr?nseca, calculada por otimiza??es de geometrias de uma sequ?ncia de configura??es ao redor do ponto de sela em n?vel MP2/6-31+G(d). A diferen?a de entalpia a 298K calculada para a rea??o foi de -49,5 kcal/mol, em bom acordo com o dado da literatura, -50,5 kcal/mol. A constante de velocidade da rea??o obtida foi de 1,41 x 10-9 cm3.mol?cula-1.s-1, a 298,15K, em excelente acordo com o dado experimental: 1,3 ? 1,6 x 10-9 cm3.mol?cula-1.s-1. Al?m disso, as constantes de velocidade globais apresentam comportamento n?o-Arrhenius, diminuindo conforme a temperatura aumenta, em um perfil consistente com a observa??o experimental. Dessa forma, a aplica??o da teoria de estado de transi??o se mostra satisfat?ria para essa rea??o. A partir do aumento da cadeia lateral, outros canais de rea??o foram observados, em prov?vel competi??o ? substitui??o nucleof?lica de ordem 2: a elimina??o de segunda ordem, E2. O ataque do nucle?filo pela frente da cadeia tamb?m foi obtido e investigado. Para as rea??es dos cloretos de alquila com cadeia lateral de n carbonos (1 < n ? 4), o n?vel B3LYP/6- 31+G(d,p) foi adotado para c?lculos de otimiza??es e frequ?ncias. Posteriormente, c?lculos em n?vel CCSD(T)/6-31+G(d,p)//B3LYP/6-31+G(d,p) foram realizados. Comparando os canais de rea??o de substitui??o nucleof?lica back e de elimina??o, o canal cineticamente favorecido foi o de elimina??o, por?m os produtos termodinamicamente mais est?veis s?o os de substitui??o nucleof?lica. Como esperado, observa-se uma barreira de potencial muito alta para as rea??es substitui??o pela frente, sendo esses canais desfavorecidos em todos os casos.Em geral, a diferen?a de energia dos pontos de sela em rela??o aos reagentes isolados mostra pequena depend?ncia com o aumento da cadeia lateral linear

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-09-25T19:07:18Z No. of bitstreams: 1 2017 - Gisele Almeida Ferreira Bentes.pdf: 1306978 bytes, checksum: 93e521ee8ae3d5f96ac3ef5491ae3d6e (MD5) / Made available in DSpace on 2018-09-25T19:07:18Z (GMT). No. of bitstreams: 1 2017 - Gisele Almeida Ferreira Bentes.pdf: 1306978 bytes, checksum: 93e521ee8ae3d5f96ac3ef5491ae3d6e (MD5) Previous issue date: 2017-03-24 / The present study had as objective to evaluate the durability of eight systems of production of vegetables in agroecological transition in the municipalities of Capim Branco and Matozinhos, belonging to the metropolitan region of Belo Horizonte, with the application of the IDEA method. In the IDEA (Indicators of Durability of Exploitations Agricole) method, the durability quantification is proposed through a matrix with 41 indicators, grouped into 10 components, which comprise three dimensions: agro-environmental (19 indicators), socio-territorial (16) and economic (6). The combination of the values of the indicators allows measuring the durability of each dimension, which can vary from zero to 100 points. The structure of the method defines that the durability of the production system is limited by the dimension that presents the lowest score. The conceptual model involves aspects of the natural, social and human sciences that, by adapting some indicators to the reality of local agroecosystems, allows the quantitative measurement of durability. The selected properties were the certified organic family farmers, non-certified and with SAT certified (without pesticides), whose main economic activity was the cultivation of vegetables. In these units, the IDEA method was applied in January 2016 through interviews conducted at the production units. In the evaluations, some obstacles were observed that limit the potential of the region as an important producer of organic vegetables. These limitations range from the lack of local inputs to lack of governmental incentive, as well as a precarious process of social organization. From the results found, it can be reported that the durability of the municipalities studied is limited by the socio-territorial dimension, which presented an average score of 65%. In addition, the economic dimension can be improved because, although it is not the limiting factor, according to the method, it presented an average score of 71%. On the other hand, the agri-environmental dimension showed a high score, above 87%. / O presente estudo teve como objetivo avaliar a durabilidade de oito sistemas de produ??o de oler?colas em transi??o agroecol?gica nos munic?pios de Capim Branco e Matozinhos, pertencentes ? regi?o metropolitana de Belo Horizonte, atrav?s da aplica??o do m?todo IDEA. No m?todo IDEA (Indicateurs de Durabilit? des Exploitations Agricole), postula-se a quantifica??o da durabilidade por meio de uma matriz com 41 indicadores, agrupados em 10 componentes, que comp?em tr?s dimens?es: agroambiental (19 indicadores), s?cio territorial (16) e econ?mica (6). A combina??o dos valores dos indicadores permite aferir durabilidade de cada dimens?o, que pode variar de zero a 100 pontos. A estrutura do m?todo define que a durabilidade em sistemas de produ??o ? limitada pela dimens?o que apresentar o menor escore. O modelo conceitual envolve aspectos das ci?ncias naturais, sociais e humanas, que mediante a adapta??o de alguns indicadores ? realidade dos agroecossistemas locais, permite a mensura??o quantitativa da durabilidade. As propriedades selecionadas foram de agricultores familiares org?nicos certificados, n?o certificados e com a certifica??o SAT (sem agrot?xicos), que tinham como principal atividade econ?mica o cultivo de hortali?as. Nessas unidades, o m?todo IDEA foi aplicado em Janeiro de 2016 por meio de entrevistas realizadas nas unidades produtivas. Nas avalia??es, foram observados alguns entraves que limitam o potencial da regi?o como importante produtora de hortali?as org?nicas. Essas limita??es compreendem desde a falta de insumos locais at? a falta de incentivo governamental, al?m de prec?rio processo de organiza??o social. A partir dos resultados encontrados, pode-se relatar que a durabilidade dos munic?pios estudados est? limitada pela dimens?o socioterritorial, a qual apresentou um escore m?dio de 65%. Al?m disso, a dimens?o econ?mica pode ser melhorada, pois, apesar de n?o ser o fator limitante, de acordo com o m?todo, apresentou escore m?dio de 71%. Por outro lado, observa-se que a dimens?o agroambiental apresentou escore elevado, acima de 87%.

Made available in DSpace on 2014-12-17T14:13:57Z (GMT). No. of bitstreams: 1 MariaSMM_DISSERT.pdf: 2097672 bytes, checksum: a8d12b585bf2f2d8634db421fbda96fc (MD5) Previous issue date: 2011-07-14 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / Embora a Transi??o Menopausal e a menopausa sejam eventos biol?gicos normais, podem ser acompanhadas de agravos que aumentam o risco de morbidade e mortalidade com destaque para os sintomas agudos da S?ndrome Climat?rica(SC). O tratamento visa o controle destes sintomas para evitar as consequ?ncias tardias da defici?ncia estrog?nica, sempre considerando a seguran?a e a tolerabilidade ao f?rmaco empregado e os fatores de risco para complica??es futuras. Objetivo: Avaliar a efic?cia, o perfil de seguran?a e tolerabilidade do uso da tibolona na transi??o menopausal. Material e m?todos: Estudo randomizado, duplo-cego, controlado com placebo, envolvendo 65 mulheres saud?veis com idade m?dia de 48,5(?3.5) anos. Crit?rios de Inclus?o: a) idade entre 40 e 55 anos; b) ?tero sem anormalidades avaliado por ultrassonografia transvaginal e com espessura endometrial&#8804;10 mm; c) irregularidade menstrual nos ?ltimos 6 meses e amenorreia inferior a 12 meses; d) n?veis s?ricos de Horm?nio Fol?culo Estimulante(FSH)>30mIU/ml; e) SC avaliada pelo ?ndice Menopausal de Blatt e Kupperman (IMK) com escore de pontos>14; f) ?ndice de Massa Corporal<30Kg/m2; g) mamografia com BI-RADS igual a 1 e 2; e ) valores de bioqu?mica sangu?nea, p?s jejum de 12 horas, dentro dos limites de normalidade. Crit?rios de exclus?o: a) fumo; b) uso nos 90 dias que antecederam a entrada no estudo de qualquer medica??o hormonal, psicotr?pica ou que interfiram com metabolismo glic?dico e lip?dico; c) qualquer doen?a neopl?sica anterior ou atual; d) hipertens?o arterial(press?o sist?lica&#8805;160 mmHg e diast?lica&#8805;105 mmHg); e) doen?as hep?ticas e renais; f)desordens cerebrovasculares, tireoideanas, cardiovasculares e 1-xiv tromboemb?licas; g) doen?as mentais; e h) diabetes mellitus. Trinta participantes foram escolhidas pelo m?todo rand?mico para o Grupo Tibolona (GT) que recebeu 2,5 mg/dia de tibolona por via oral durante 12 semanas cont?nuas; as demais 35 foram inclu?das no Grupo Placebo (GP) que recebeu 1 c?psula/lactose/dia, por igual per?odo. Medidas utilizadas: A efic?cia da tibolona foi avaliada pelo IMK e a Escala Climat?rica de Greene (GSC). Na avalia??o da seguran?a e tolerabilidade utilizou-se par?metros bioqu?micos (perfil lip?dico, glicemia e fun??o hep?tica), medida da espessura endometrial, o registro di?rio de queixas relacionadas com o tratamento e a evolu??o de medidas antropom?tricas {?ndice de Massa Corporal(IMC), Circunfer?ncia da Cintura(CC) e Raz?o cintura/quadril(RCQ)}.Resultados: Cinquenta e sete participantes (87,7%) conclu?ram o estudo. Ao final de 12 semanas, ao se comparar os dois grupos, em rela??o aos valores basais, observa-se: no GT uma diminui??o significativa nos sintomas climat?ricos: IMK (35,5 + 6,7 vs. 11,3 + 6,5) e GSC (31,9?4.6 vs. 19,8 + 10,5) p<0,001; melhora do perfil lip?dico com redu??o do Triglicer?deos (152,2 + 53,0 vs. 105,2 + 26,8)p<0,001, colesterol total (220,7 + 38,5 vs. 193,3 + 37,9) p=0,001 e LDL colesterol (144,7 + 36,9 vs. 129,0 + 43,6)p=0,03; redu??o em 25,7% na rela??o Triglicerideos/HDL-c, fator preditor de resist?ncia insul?nica e de risco para doen?a arterial coronariana. No mesmo grupo, observou-se redu??o de 21% na espessura endometrial em rela??o ao valor basal (8.1 ? 2.6 vs 6.4 ? 1.9; p<0,05), compat?vel com atrofia; n?o houve altera??es nos marcadores hep?ticos e nem relatos de efeitos colaterais que levassem a interrup??o do tratamento. Conclus?es: A tibolona mostrou-se eficaz para reduzir a sintomatologia climat?rica de mulheres na transi??o menopausal, com boa tolerabilidade e melhora no perfil lip?dico. A 1-xv atrofia endometrial sugere prov?vel seguran?a para o seu uso como agente terap?utico da transi??o menopausal.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-06T20:38:09Z No. of bitstreams: 1 TiagoSiebertAltavini_TESE.pdf: 2131166 bytes, checksum: e6857312ffe2ac0d8a4cdc18238707e4 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-08T17:47:44Z (GMT) No. of bitstreams: 1 TiagoSiebertAltavini_TESE.pdf: 2131166 bytes, checksum: e6857312ffe2ac0d8a4cdc18238707e4 (MD5) / Made available in DSpace on 2016-07-08T17:47:44Z (GMT). No. of bitstreams: 1 TiagoSiebertAltavini_TESE.pdf: 2131166 bytes, checksum: e6857312ffe2ac0d8a4cdc18238707e4 (MD5) Previous issue date: 2016-01-29 / A atividade cerebral espont?nea exibe padr?es que lembram o de coativa??o de conjuntos neuronais em resposta a est?mulos ou tarefas. Estes padr?es tem sido atribu?dos a arquitetura funcional do c?rebro, e.g. conex?es de longo alcance em patches (manchas, fragmentos). N?s investigamos diretamente a contribui??o destas conex?es em patches entre hemisf?rios para mapas espont?neos e evocados na ?rea 18 pr?xima a borda 17/18 de gatos. Registramos mapas com imageamento por votage-sensitive dye (VSD) e atividade despiking enquanto manipulamos o input interhemisf?rico pela desativa??o revers?vel das ?reas correspondentes contralaterais. Durante a desativa??o os mapas espont?neos continuaram sendo gerados com frequ?ncia e qualidade semelhante ao da rede intacta, mas um vi?s de orienta??es cardinais desapareceu. Neur?nios com prefer?ncia por orienta??es horizontais (HN) ou verticais (VN), ao contr?rio dos de prefer?ncia obl?qua, diminuiram sua atividade de repouso, no entanto, HN tiveram a atividade diminu?da mesmo quando estimulados visualmente. Conclu?mos que mapas espont?neos estruturados s?o primariamente gerados por conex?es t?lamo- e/ou intracorticais. Entretanto, conex?es de longo alcance pelo corpo caloso - como um prolongamento da rede de longo alcance intracortical - contribui para um vi?s cardinal, possivelmente porque estas conex?es s?o mais fortes ou mais frequentes entre neur?nios preferindo orienta??es horizontais e/ou cardinais. Estes contornos s?o mais f?ceis de perceber e aparecem com mais frequ?ncia no ambiente natural, cone x?es de longo alcance podem prover o c?rtex visual com um grid de opera??es probabil?sticas de agrupamento em uma cena visual maior. / In the primary visual cortex, neurons with similar physiological features are clustered together in columns extending through all six cortical layers. These columns form modular orientation preference maps. Long-range lateral fibers are associated to the structure of orientation maps since they do not connect columns randomly; they rather cluster in regular intervals and interconnect predominantly columns of neurons responding to similar stimulus features. Single orientation preference maps ? the joint activation of domains preferring the same orientation - were observed to emerge spontaneously and it was speculated whether this structured ongoing activation could be caused by the underlying patchy lateral connectivity. Since long-range lateral connections share many features, i.e. clustering, orientation selectivity, with visual inter-hemispheric connections (VIC) through the corpus callosum we used the latter as a model for long-range lateral connectivity. In order to address the question of how the lateral connectivity contributes to spontaneously generated maps of one hemisphere we investigated how these maps react to the deactivation of VICs originating from the contralateral hemisphere. To this end, we performed experiments in eight adult cats. We recorded voltage-sensitive dye (VSD) imaging and electrophysiological spiking activity in one brain hemisphere while reversible deactivating the other hemisphere with a cooling technique. In order to compare ongoing activity with evoked activity patterns we first presented oriented gratings as visual stimuli. Gratings had 8 different orientations distributed equally between 0? and 180?. VSD imaged frames obtained during ongoing activity conditions were then compared to the averaged evoked single orientation maps in three different states: baseline, cooling and recovery. Kohonen self-organizing maps were also used as a means of analysis without prior assumption (like the averaged single condition maps) on ongoing activity. We also evaluated if cooling had a differential effect on evoked and ongoing spiking activity of single units. We found that deactivating VICs caused no spatial disruption on the structure of either evoked or ongoing activity maps. The frequency with which a cardinally preferring (0? or 90?) map would emerge, however, decreased significantly for ongoing but not for evoked activity. The same result was found by training self-organizing maps with recorded data as input. Spiking activity of cardinally preferring units also decreased significantly for ongoing when compared to evoked activity. Based on our results we came to the following conclusions: 1) VICs are not a determinant factor of ongoing map structure. Maps continued to be spontaneously generated with the same quality, probably by a combination of ongoing activity from local recurrent connections, thalamocortical loop and feedback connections. 2) VICs account for a cardinal bias in the temporal sequence of ongoing activity patterns, i.e. deactivating VIC decreases the probability of cardinal maps to emerge spontaneously. 3) Inter- and intrahemispheric long-range connections might serve as a grid preparing primary visual cortex for likely junctions in a larger visual environment encompassing the two hemifields.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-11T17:51:54Z No. of bitstreams: 1 ElianaMesquitaDaSilva_DISSERT.pdf: 3246519 bytes, checksum: 6c088e76cfe91f1f780680d007b22351 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-18T21:28:43Z (GMT) No. of bitstreams: 1 ElianaMesquitaDaSilva_DISSERT.pdf: 3246519 bytes, checksum: 6c088e76cfe91f1f780680d007b22351 (MD5) / Made available in DSpace on 2016-07-18T21:28:43Z (GMT). No. of bitstreams: 1 ElianaMesquitaDaSilva_DISSERT.pdf: 3246519 bytes, checksum: 6c088e76cfe91f1f780680d007b22351 (MD5) Previous issue date: 2015-08-28 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / No contexto do enfrentamento das consequ?ncias da transi??o demogr?fica, o envelhecimento populacional se caracteriza como um importante desafio para a sociedade brasileira. Nesse sentido, este estudo foi desenvolvido em dois objetivos principais. No primeiro artigo, foram empregadas vari?veis de contextos socioecon?micos e demogr?ficos para a identifica??o de perfis multidimensionais dos idosos residentes nas capitais do Nordeste, a partir de indicadores espec?ficos provenientes das informa??es do Censo Demogr?fico 2010. Para tanto, foi utilizado o m?todo Grade of Membership (GoM), cujo delineamento de perfis admite que um indiv?duo perten?a a diferentes graus de pertin?ncia a m?ltiplos perfis, de modo a identificar fatores socioecon?micos e demogr?ficos associados ?s condi??es de vida dos idosos das capitais nordestinas, e mostrar diferen?as na combina??o entre eles. Os principais resultados mostram a forma??o de tr?s perfis extremos: Perfil 1(35,5%), Perfil 2 (24,8%) e Perfil 3 (29,7%). De modo geral, os resultados apontam para perfis com condi??es de vida prec?rias que s?o expressos principalmente pelos baixos n?veis de escolaridade e pela renda mensal domiciliar per capita. O segundo artigo analisou rela??o entre a mortalidade por doen?as cr?nicas (Neoplasias, Doen?as Hipertensivas, Infarto Agudo do Mioc?rdio, Doen?as Cerebrovasculares, Pneumonia e Doen?as Cr?nicas das vias ?reas Inferiores) na popula??o de idosos, dos 137 bairros de Natal, desagregados por faixas et?rias decenais (60 a 69 anos, 70 a 79 anos e 80 anos e mais), e indicadores socioecon?micos. Foram utilizados os microdados do Sistema de Informa??o de Mortalidade (SIM), disponibilizados pela Secretaria de Sa?de de Natal, e as informa??es populacionais s?o provenientes do Censo Demogr?fico 2010. O m?todo utilizado refere-se ? l?gica de vizinhan?a do ?ndice Global e Local (LISA) de Moran, cuja espacializa??o a partir dos mapas coropl?ticos permitiu analisar a mortalidade dos idosos por bairros, segundo indicadores socioecon?micos e demogr?ficos, de acordo com a presen?a de signific?ncia espacial. Os resultados mostram maior propor??o de idosos concentrada nos bairros de melhor condi??o socioecon?mica, como Petr?polis e Lagoa Seca. As taxas de mortalidade, segundo as causas de morte e padronizadas pelo M?todo Bayesiano Emp?rico, distribu?ram-se localmente da seguinte forma: Neoplasias (Santos Reis, Nova Descoberta, Cidade Nova, Capim Macio e Ponta Negra); Doen?as Hipertensivas (Lagoa Azul, Potengi, Redinha, Santos Reis, Ribeira, Lagoa Nova, Capim Macio, Ne?polis e Ponta Negra); Infarto Agudo do Mioc?rdio (Nordeste, Guarap?s e Capim Macio); Doen?as Cerebrovasculares (Petr?polis e M?e Lu?za); Pneumonia (Ribeira, Praia do Meio, Nova Descoberta, Capim Macio e Ponta Negra); Doen?as Cr?nicas das Vias A?reas Inferiores (Igap?, Nordeste e Quintas). Os achados presentes no trabalho poder?o contribuir para outros estudos sobre o tema e fomento de pol?ticas espec?ficas para os idosos. / Population aging is a global demographic trend. This process is a reality that merits attention and importance in recent years, and cause considerable impact in terms of greater demands on the health sector, social security and special care and attention from families and society as a whole. Thus, in the context of addressing the consequences of demographic transition, population aging is characterized as a major challenge for Brazilian society. Therefore, this study was conducted in two main objectives. In the first article, variables of socioeconomic and demographic contexts were employed to identify multidimensional profiles of elderly residents in the Northeast capitals, from specific indicators from the 2010 Census information Therefore, we used the Grade of Membership Method (GoM), whose design profiles admits that an individual belongs to different degrees of relevance to multiple profiles in order to identify socioeconomic and demographic factors associated with living conditions of the elderly in the Northeastern capitals. The second article examined the possible relationship between mortality from chronic diseases and socio-economic indicators in the elderly population, of the 137 districts in Natal, broken down by ten-year age groups (60 to 69 years, 70-79 years and 80 and over. The microdata from the Mortality Information System (SIM), was used, provided by the Health Secretariat of Christmas, and population information came from the Population Census 2010. The method refers to the Global and Local Index neighborhood logic (LISA) Moran, whose spatial distribution from the choropleth maps allowed us to analyze the mortality of the elderly by neighborhoods, according to socioeconomic and demographic indicators, according to the presence of special significance. In the first article, the results show the identification of three extreme profiles. The Profile 1 which is characterized by median socioeconomic status and contributes 35.5% of elderly residents in the area considered. The profile 2 which brings together seniors with low socioeconomic status characteristics, with a percentage of 24.8% of cases. And the Profile 3 composing elderly with features that reveal better socioeconomic conditions, about 29.7% of the elderly. Overall, the results point to poor living conditions represented by the definition of these profiles, mainly expressed by the results observed in more than half of the northeastern elderly experience a situation of social vulnerability given the large percentage that makes up the Profile 1 and Profile 2, adding 60% of the elderly. In the second article, the results show a higher proportion of elderly concentrated in the neighborhoods of higher socioeconomic status, such as Petr?polis and LagoaSeca. Mortality rates, according to the causes of death and standardized by the empirical Bayesian method were distributed locally as follows: Neoplasms (Reis Santos, New Discovery, New Town, Grass Soft and Ponta Negra); Hypertensive diseases (Blue Lagoon, Potengi, Redinha, Reis Santos, Riverside, Lagoa Nova, Grass Soft, Ne?polis and Ponta Negra); Acute Myocardial Infarction (Northeast, Guarapes and grass Soft); Cerebrovascular diseases (Petr?polis and Mother Luiza); Pneumonia (Ribeira, Praia do Meio, New Discovery, Grass Soft and Ponta Negra); Chronic Diseases of the Lower Way Airlines (Igap?, Northeast and Thursdays). The present findings at work may contribute to other studies on the subject and development of specific policies for the elderly.