Thesis (MSc (Mathematics))--University of Stellenbosch, 2010. / ENGLISH ABSTRACT: This thesis is a study of a generalisation, due to R. Harte (see [9]), of Fredholm theory in the context of bounded linear operators on Banach spaces to a theory in a Banach algebra setting. A bounded linear operator T on a Banach space X is Fredholm if it has closed range and the dimension of its kernel as well as the dimension of the quotient space X/T(X) are finite. The index of a Fredholm operator is the integer dim T−1(0)−dimX/T(X). Weyl operators are those Fredholm operators of which the index is zero. Browder operators are Fredholm operators with finite ascent and descent. Harte’s generalisation is motivated by Atkinson’s theorem, according to which a bounded linear operator on a Banach space is Fredholm if and only if its coset is invertible in the Banach algebra L(X) /K(X), where L(X) is the Banach algebra of bounded linear operators on X and K(X) the two-sided ideal of compact linear operators in L(X). By Harte’s definition, an element a of a Banach algebra A is Fredholm relative to a Banach algebra homomorphism T : A ! B if Ta is invertible in B. Furthermore, an element of the form a + b where a is invertible in A and b is in the kernel of T is called Weyl relative to T and if ab = ba as well, the element is called Browder. Harte consequently introduced spectra corresponding to the sets of Fredholm, Weyl and Browder elements, respectively. He obtained several interesting inclusion results of these sets and their spectra as well as some spectral mapping and inclusion results. We also convey a related result due to Harte which was obtained by using the exponential spectrum. We show what H. du T. Mouton and H. Raubenheimer found when they considered two homomorphisms. They also introduced Ruston and almost Ruston elements which led to an interesting result related to work by B. Aupetit. Finally, we introduce the notions of upper and lower semi-regularities – concepts due to V. M¨uller. M¨uller obtained spectral inclusion results for spectra corresponding to upper and lower semi-regularities. We could use them to recover certain spectral mapping and inclusion results obtained earlier in the thesis, and some could even be improved. / AFRIKAANSE OPSOMMING: Hierdie tesis is ‘n studie van ’n veralgemening deur R. Harte (sien [9]) van Fredholm-teorie in die konteks van begrensde lineˆere operatore op Banachruimtes tot ’n teorie in die konteks van Banach-algebras. ’n Begrensde lineˆere operator T op ’n Banach-ruimte X is Fredholm as sy waardeversameling geslote is en die dimensie van sy kern, sowel as di´e van die kwosi¨entruimte X/T(X), eindig is. Die indeks van ’n Fredholm-operator is die heelgetal dim T−1(0) − dimX/T(X). Weyl-operatore is daardie Fredholm-operatore waarvan die indeks gelyk is aan nul. Fredholm-operatore met eindige styging en daling word Browder-operatore genoem. Harte se veralgemening is gemotiveer deur Atkinson se stelling, waarvolgens ’n begrensde lineˆere operator op ’n Banach-ruimte Fredholm is as en slegs as sy neweklas inverteerbaar is in die Banach-algebra L(X) /K(X), waar L(X) die Banach-algebra van begrensde lineˆere operatore op X is en K(X) die twee-sydige ideaal van kompakte lineˆere operatore in L(X) is. Volgens Harte se definisie is ’n element a van ’n Banach-algebra A Fredholm relatief tot ’n Banach-algebrahomomorfisme T : A ! B as Ta inverteerbaar is in B. Verder word ’n Weyl-element relatief tot ’n Banach-algebrahomomorfisme T : A ! B gedefinieer as ’n element met die vorm a + b, waar a inverteerbaar in A is en b in die kern van T is. As ab = ba met a en b soos in die definisie van ’n Weyl-element, dan word die element Browder relatief tot T genoem. Harte het vervolgens spektra gedefinieer in ooreenstemming met die versamelings van Fredholm-, Weylen Browder-elemente, onderskeidelik. Hy het heelparty interessante resultate met betrekking tot insluitings van die verskillende versamelings en hulle spektra verkry, asook ’n paar spektrale-afbeeldingsresultate en spektraleinsluitingsresultate. Ons dra ook ’n verwante resultaat te danke aan Harte oor, wat verkry is deur van die eksponensi¨ele-spektrum gebruik te maak. Ons wys wat H. du T. Mouton en H. Raubenheimer verkry het deur twee homomorfismes gelyktydig te beskou. Hulle het ook Ruston- en byna Rustonelemente gedefinieer, wat tot ’n interessante resultaat, verwant aan werk van B. Aupetit, gelei het. Ten slotte stel ons nog twee begrippe bekend, naamlik ’n onder-semi-regulariteit en ’n bo-semi-regulariteit – konsepte te danke aan V. M¨uller. M¨uller het spektrale-insluitingsresultate verkry vir spektra wat ooreenstem met bo- en onder-semi-regulariteite. Ons kon dit gebruik om sekere spektrale-afbeeldingsresultate en spektrale-insluitingsresultate wat vroe¨er in hierdie tesis verkry is, te herwin, en sommige kon selfs verbeter word.

Made available in DSpace on 2014-06-11T19:27:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-07-28Bitstream added on 2014-06-13T20:16:06Z : No. of bitstreams: 1 antonow_lm_me_rcla.pdf: 366751 bytes, checksum: adcb2380c3d0056c89dc0a6656d12c25 (MD5) / Este trabalho consistiu em coletar e desenvolver uma sequência didática para o ensino de Análise Funcional aos estudantes de iniciação científica. Neste sentido a dissertação foi escrita para ser utilizada como livro-texto, transmitindo uma introdução de Análise Funcional e com o objetivo que ao final os estudantes estejam aptos a estudar textos mais específicos / This work suggests a didatic road map for teaching Functional Analysis to un- dergraduated students who wish to initiate a scientific carrier. The dissertation was written an introductory text book of Functional Analysis ofter which students could migrate to more specific papers

Made available in DSpace on 2014-06-11T19:27:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-11-30Bitstream added on 2014-06-13T19:47:34Z : No. of bitstreams: 1 machado_lb_me_rcla.pdf: 1035969 bytes, checksum: aa3cdd04f049c7a6251e1a19935af959 (MD5) / O presente trabalho, intitulado Análise Funcional e Aplicações, tem por objetivo realizar um estudo sobre espaços de funções, principalmente, os espaços de dimensão infinita. Em particular, apresentar resultados sobre a teoria de funcionais lineares e espaço dual, conceitos de ortogonalidade e teoremas fundamentais em Análise Funcional como, por exemplo, o Teorema da Representação de Riesz e os Teoremas de Hahn- Banach / This work, entitled Functional Analysis and Applications, has by objective to carry an study on function spaces, mainly, spaces of infinite dimension. In particular, to present results on the theory of linear functionals and dual space, concepts of orthogonality and fundamental theorems in Functional Analysis as, for example, the Riesz Representation Theorem and the Hahn-Banach Theorems

Orientador: Marta Cilene Gadotti / Banca: Adilson José Vieira Brandão / Banca: Wladimir Seixas / Resumo: Neste trabalho, abordaremos os principais conceitos e propriedades sobre espaço de Banach e espaço de Hilbert com o objetivo de oferecer o conteúdo necessário para discutirmos algumas aplicações desses conceitos. Mostraremos a existência e unicidade de solução de Equações Diferenciais Ordinárias de Primeira Ordem, existência e unicidade de solução de certas Equações Integrais e existência e unicidade de melhor aproximação em espaços normados e de Hilbert / Abstract: In this work, we will discuss the main concepts and properties on Banach space and Hilbert space in order to offer the necessary content to discuss some applications of these concepts. We will show the existence and uniqueness of the solution of First Order Ordinary Differential Equations, existence and uniqueness of solution of certain Integral Equations and existence and uniqueness of better approximation in normed and Hilbert spaces / Mestre

Orientador: Jair Lopes Júnior / Banca: Aline Maria de Medeiros Rodrigues Reali / Banca: Nelson Antonio Pirola / Resumo: A literatura admite a relevância de diferentes modalidades de saberes ou de conhecimentos envolvidos nos processos de aprendizagem profissional da docência. Nesta pesquisa admite-se que repertórios comportamentais que definem a execução de análise funcional descritiva se contituiriam em exemplos de saberes docentes. Esta pesquisa avalia a quisição desta modalidade de saber docente por professoras com distintas formações pedagógicas e que ministram conteúdos de matemática no ensino fundamental. Participaram 2 professoras: P1, licenciada em Matemática (8ª. série) e P2, em Pedagogia (4ª. série). O procedimento foi dividido em 3 etapas. Na Etapa 1, ocorreram: a) entrevista inicial, b) registros, em vídeo, de aulas referentes a duas unidades didáticas (UD1 e UD2), c) entrevista na ausência de episódios das aulas gravadas da UD1 e d) entrevista na presença de episódios de vídeo das aulas da UD1. Na Etapa 2, ocorreram: a) apresentação de um modelo de análise funcional descritiva pela professora; e d) apresentação do modelo de análise funcional da pesquisadora sobre esses episódios. Na Etapa 3, houve: a) registro, em vídeo, das aulas da UD3; e diante dos episódios das aulas da UD3, b) solicitação de elaboração de análise funcional descritiva e, c) solicitação de elaboração de análises comparativas entre as interpretações das aulas das UDs 2 e 3. Verificou-se, nas Etapas 1 e 2, consistências entre as ações registradas em vídeo (práticas transmissivas e a liberação de reforços independentes da manifestação das relações de controle de estímulo previstas) e os relatos das professoras (ênfase na obtenção da resposta correta, desvinculadas das condições nas quais foram emitidas). As características foram registradas, tanto na presença, quanto na ausência dos episódios das aulas da UDI e mostraram-se distantes... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The literature admits the importance of different knowledge models or concepts in learn process of professional teacher. This research is based in behavior concepts that define the execution of descriptive functional analysis are based in samples of teacher knowledge. This research evaluates the aquisition of teacher knowledge models by teachers with distenctive pedagogic formation and to minister mathematics contents in elementary school. Two teachers are studied: P1, mathematics formation (8ª grade) and P2, Pedagogic formation (4ª grade). The experiment had three steps. Step 1: a) initial report; b) record, in tape, of class about two didatic units (UD1 e UD2); c) absent report; e d) report in presence of class tapes in UD1. Step 2: a) exposition of a descriptive functional analyze model by research about episode show in UD1 class; b) exhibition of episode in UD2 class; c) solicitation of descriptive functional analyze work by teacher; e d) research exposition of a descriptive functional analysis model about this episodes. Step 3: a) record, in tape, of UD3 class; and in front of the UD3 class episodes, b) solicitation of descriptive funcional analyze work and, c) solicitation of comparative work analysis between the 2 and 3 UDs class interpretation. In Steps 1 and 2 are founded consistencies between the actions records in tape (transmission practices and liberation of reinforcements independent of the relations of control manifestation of preview stimulus) and teachers reports (emphasis in correct answer, independent of condition that she was emited). The characteristics were recorded, as in presence, as in absence of UD1 class and show distance of the definition of the descriptive functional analyze. In step 2, properties of student performance were related with the properties of adopted practices. In step 3, P1 evidenced re-incidence... (Complete abstract click electronic access below) / Mestre

Problem behavior, such as off &ndash - &ndash task behavior, is one of the most commonly cited challenges competing with school readiness skills for young children with disabilities. This study demonstrated how a functional behavior assessment can be conducted in a school setting to determine the functional relation between off &ndash - &ndash task behavior and academic engagement stimuli for three kindergarten students at &ndash - &ndash risk of academic failure. Indirect and descriptive behavior assessments were first conducted to determine the hypothesized function of off &ndash - &ndash task behavior. Two experimental functional analysis conditions were then constructed to confirm the hypothesized function. Results demonstrated that when preferred academic engagement stimuli were used during instruction, escape &ndash - &ndash maintained off &ndash - &ndash task behavior decreased substantially. Therefore, the use of preferred stimuli as an instructional support may have abolished the value of escape as reinforcement for off &ndash - &ndash task behavior. Implications for practice and future research are discussed.

Made available in DSpace on 2014-06-11T19:29:00Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-02-20Bitstream added on 2014-06-13T20:18:43Z : No. of bitstreams: 1 sparvoli_dap_me_bauru.pdf: 633649 bytes, checksum: e736b947775ad17eb8fe6228d0735189 (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / A literatura admite a relevância de diferentes modalidades de saberes ou de conhecimentos envolvidos nos processos de aprendizagem profissional da docência. Nesta pesquisa admite-se que repertórios comportamentais que definem a execução de análise funcional descritiva se contituiriam em exemplos de saberes docentes. Esta pesquisa avalia a quisição desta modalidade de saber docente por professoras com distintas formações pedagógicas e que ministram conteúdos de matemática no ensino fundamental. Participaram 2 professoras: P1, licenciada em Matemática (8ª. série) e P2, em Pedagogia (4ª. série). O procedimento foi dividido em 3 etapas. Na Etapa 1, ocorreram: a) entrevista inicial, b) registros, em vídeo, de aulas referentes a duas unidades didáticas (UD1 e UD2), c) entrevista na ausência de episódios das aulas gravadas da UD1 e d) entrevista na presença de episódios de vídeo das aulas da UD1. Na Etapa 2, ocorreram: a) apresentação de um modelo de análise funcional descritiva pela professora; e d) apresentação do modelo de análise funcional da pesquisadora sobre esses episódios. Na Etapa 3, houve: a) registro, em vídeo, das aulas da UD3; e diante dos episódios das aulas da UD3, b) solicitação de elaboração de análise funcional descritiva e, c) solicitação de elaboração de análises comparativas entre as interpretações das aulas das UDs 2 e 3. Verificou-se, nas Etapas 1 e 2, consistências entre as ações registradas em vídeo (práticas transmissivas e a liberação de reforços independentes da manifestação das relações de controle de estímulo previstas) e os relatos das professoras (ênfase na obtenção da resposta correta, desvinculadas das condições nas quais foram emitidas). As características foram registradas, tanto na presença, quanto na ausência dos episódios das aulas da UDI e mostraram-se distantes... / The literature admits the importance of different knowledge models or concepts in learn process of professional teacher. This research is based in behavior concepts that define the execution of descriptive functional analysis are based in samples of teacher knowledge. This research evaluates the aquisition of teacher knowledge models by teachers with distenctive pedagogic formation and to minister mathematics contents in elementary school. Two teachers are studied: P1, mathematics formation (8ª grade) and P2, Pedagogic formation (4ª grade). The experiment had three steps. Step 1: a) initial report; b) record, in tape, of class about two didatic units (UD1 e UD2); c) absent report; e d) report in presence of class tapes in UD1. Step 2: a) exposition of a descriptive functional analyze model by research about episode show in UD1 class; b) exhibition of episode in UD2 class; c) solicitation of descriptive functional analyze work by teacher; e d) research exposition of a descriptive functional analysis model about this episodes. Step 3: a) record, in tape, of UD3 class; and in front of the UD3 class episodes, b) solicitation of descriptive funcional analyze work and, c) solicitation of comparative work analysis between the 2 and 3 UDs class interpretation. In Steps 1 and 2 are founded consistencies between the actions records in tape (transmission practices and liberation of reinforcements independent of the relations of control manifestation of preview stimulus) and teachers reports (emphasis in correct answer, independent of condition that she was emited). The characteristics were recorded, as in presence, as in absence of UD1 class and show distance of the definition of the descriptive functional analyze. In step 2, properties of student performance were related with the properties of adopted practices. In step 3, P1 evidenced re-incidence... (Complete abstract click electronic access below)

Orientador: Marta Cilene Gadotti / Banca: Wladimir Seixas / Banca: Miguel Vinicios Santini Frasson / Resumo: O presente trabalho, intitulado Análise Funcional e Aplicações, tem por objetivo realizar um estudo sobre espaços de funções, principalmente, os espaços de dimensão infinita. Em particular, apresentar resultados sobre a teoria de funcionais lineares e espaço dual, conceitos de ortogonalidade e teoremas fundamentais em Análise Funcional como, por exemplo, o Teorema da Representação de Riesz e os Teoremas de Hahn- Banach / Abstract: This work, entitled Functional Analysis and Applications, has by objective to carry an study on function spaces, mainly, spaces of infinite dimension. In particular, to present results on the theory of linear functionals and dual space, concepts of orthogonality and fundamental theorems in Functional Analysis as, for example, the Riesz Representation Theorem and the Hahn-Banach Theorems / Mestre

Orientador: Eraldo Pereira Marinho / Banca: Geraldo Nunes Silva / Banca: . Suzete Maria Silva Afonso / Resumo: Esta dissertação objetiva-se ao estudo analítico de técnicas de interpolação integral - fundamentadas na teoria de distribuição, também conhecida como teoria de funções generalizadas - e suas aplicações a reconstrução de imagens formadas por partículas (noise image) e à forma anisotrópica das equações da hidrodinâmica com partículas suavizadas, no inglês smoothed particle hydrodynamics, bem conhecida como SPH. A aplicação a processamento de imagens é um caso particular da técnica de interpolação utilizada em SPH. A imagem original é fragmentada na forma de partículas (em duas dimensões), aleatoriamente colhidas dos píxeis da imagem original, cuja densidade de probabilidade é proporcional à escala de cinza de cada píxel vizinho. Então é feita uma reconstrução da imagem através de interpolação anisotrópica, evidenciando que detalhes estruturais do contexto original são mais bem recuperados do que a correspondente técnica isotrópica. Apesar de não realizarmos diretamente simulações de mecânica dos fluidos neste trabalho, o que é proposto aqui é uma revisão das equações fundamentais da técnica de simulação SPH para o caso anisotrópico. As interpolações apresentadas neste trabalho foram feitas a partir de um núcleo normalizado de suavização, definido na forma de uma função regulada por partes, conhecida como cubic-B-spline, que é de classe analítica C2 / Abstract: This mastered dissertation aims at the analytical study of integral interpolation techniques - based on the theory of distribution, also known as generalized function theory - and its applications the reconstruction of images formed by particles (noise image) and the anisotropic form of the fundamental equations of smoothed particle hydrodynamics, well known as SPH. The application to image processing is a particular case of the interpolation technique used in SPH. The original image is fragmented in the form of particles (in two dimensions), randomly drawn from the píxels of the original image, whose density is proportional to the gray scale of each neighboring píxel. Then a reconstruction of the image is made through anisotropic interpolation, evidencing that structural details of the original context are better recovered than the corresponding isotropic technique. Although we do not directly perform fluid mechanics simulations in this work, what is proposed here is a review of the fundamental equations of the SPH simulation technique for the anisotropic case. The interpolations presented in this work were made from a normalized smoothing kernel, defined as cubic-B-spline, which is of analytic class C2 / Mestre

Aim of this thesis was to shed light on the function(s) of Iba57 and Ssc1 proteins in both life cycle stages of T. brucei using RNA interference. Depletion of Ssc1 resulted in severe grow phenotype, decrease in activities of iron-sulphur cluster-containing enzyme aconitase but no increase in oxidative stress sensitivity or accumulation of ROS in mitochondrion. Down regulation of Iba57, specialized maturation factor of aconitase and homoaconitase, lead to depletion of aconitase, destabilization of Isa1 and increased sensitivity to oxidative stress and accumulation of ROS in both stages.