Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2014. / Submitted by Laura Conceição (laurinha.to@gmail.com) on 2014-11-20T19:11:26Z No. of bitstreams: 1 2014_DanielAlvesdaSilva.pdf: 3107164 bytes, checksum: c2636244ebf837cd7d49c3e4f93f433a (MD5) / Approved for entry into archive by Guimaraes Jacqueline(jacqueline.guimaraes@bce.unb.br) on 2014-11-26T12:50:55Z (GMT) No. of bitstreams: 1 2014_DanielAlvesdaSilva.pdf: 3107164 bytes, checksum: c2636244ebf837cd7d49c3e4f93f433a (MD5) / Made available in DSpace on 2014-11-26T12:50:55Z (GMT). No. of bitstreams: 1 2014_DanielAlvesdaSilva.pdf: 3107164 bytes, checksum: c2636244ebf837cd7d49c3e4f93f433a (MD5) / A presente dissertação propõe uma extensão ao modelo ontológico do Orçamento Federal Brasileiro, de modo a apresentar valores de execução orçamentária correlacionados com as restrições originais do orçamento planejado. A hipótese é a de que tal extensão permite aumentar as capacidades dos sistemas existentes de análise e execução orçamentária e suporta a análise estratégica comparativa entre o orçamento planejado em relação aos resultados da sua execução. Para verificar essa hipótese, indo além do modelo anterior que oferece apenas informações anuais do planejamento orçamentário, o novo modelo proposto acrescenta uma nova granularidade para séries temporais e critérios adicionais de classificação. A avaliação dessa solução é feita pela implementação do modelo de modo a produzir datasets do orçamento em formato RDF (resource description framework), conforme recomendado pelo World Wide Web Consortium (W3C) como linguagem de escolha para representação do conhecimento. Desse modo, os resultados finais são publicados e acessados em um terminal de consultas denominado endpoint, visando dar suporte a um monitoramento público e just-in-time para o planejamento e para a execução do orçamento. Estatísticas de acesso apontam que a utilização desse endpoint comprova que a extensão proposta permite acesso ao conhecimento contido na execução orçamentária, mesmo por pessoas e sistemas externos ao órgão de planejamento do orçamento, o que confirma a hipótese da dissertação. _______________________________________________________________________________________ ABSTRACT / This master thesis proposes an extension to the Ontological model of the Brazilian Federal Budget, in order to present the budget execution values correlated with the original restrictions defined in the planned budget. The hypothesis is that this extension allows increasing the capabilities of existing budget analysis and execution systems since it supports the strategic comparative analysis between the planned budget and the results of its execution. To verify this hypothesis, going beyond the previous model that only provides annual information of budget planning, the proposed new model adds a new granularity for time series and additional classification. The evaluation of this solution is done by implementing the model in order to produce the budget datasets in RDF (Resource Description Framework), the format recommended by World Wide Web Consortium (W3C) as the chosen language for knowledge representation. Thus, the final results are published and accessed on an endpoint, aiming to support public and just-in-time monitoring for the planning and execution of the budget. Utilization data of this endpoint shows that the proposed extension allows access to the knowledge contained in budget execution, even by external people and systems of the Government Federal Budget, which confirms the hypothesis of this master thesis.

Nesta dissertação estudamos algumas aplicações da teoria das bases de Gröbner, visando principalmente a utilização dessas técnicas na teoria de códigos. Apresentamos um algoritmo para obter a base de Gröbner reduzida do ideal de um conjunto finito de pontos, e descrevemos um método para encontrar aproximações de Padé de polinômios multivariados. Terminamos apresentando o procedimento desenvolvido por J. Farr e S. Gao para a construção e decodificação de códigos lineares via bases de Gröbner. / In this master thesis we study some applications of Grobner bases theory, aiming using these techniques in coding theory. We present an algorithm for computing the reduced Grobner basis of the vanishing ideal of a finite set of points, and describe a method for finding Padé approximations of multivariate polynomials. We finish presenting the procedure developed by J. Farr and S. Gao for construction and decoding of linear codes via Gröbner bases.

Submitted by Etelvina Domingos (etelvina.domingos@ufpe.br) on 2015-03-10T18:09:49Z No. of bitstreams: 2 Tese_Maria Isabelle.pdf: 664516 bytes, checksum: 86bc23fbb9b6a3915107f2f71747f961 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) / Made available in DSpace on 2015-03-10T18:09:49Z (GMT). No. of bitstreams: 2 Tese_Maria Isabelle.pdf: 664516 bytes, checksum: 86bc23fbb9b6a3915107f2f71747f961 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2012-05 / Nesta tese caracterizamos pares de matróides (M1;M2) que possuem poucas bases não-comuns, isto é, |B(M1) B(M2)| ≤ n, para um natural n ≥ 3, desde que M1 e M2 não possuam circuitos e cocircuitos pequenos, mais precisamente com cardinalidade inferior a n. Para o caso em que n = 3, fazemos o estudo também para as matróides possuindo circuitos e cocircuitos de qualquer tamanho, inclusive tamanhos um e dois.

This study focuses on the antimicrobial activity of Cu(II) complexes of some orthohydroxybenzaldimines and its derivatives. Four different categories of Schiff base ligands were prepared by condensing salicylaldehyde, o-vanillin, p-vanillin and vanillin with p- and osubstituted anilines; 1-aminonaphthalene; 2- and 3-aminopyridine; 2- and 3- aminomethylpyridine as well as 2-aminobenzimidazole. The last category was prepared from ophenylenediamine and o-vanillin. The Schiff base ligands have been characterized by a combination of elemental analysis and spectral (¹H- and ¹³C-NMR, UV/Visible, infrared and Raman) data. The existence of strong intramolecular hydrogen bonding in the orthohydoxybenzaldimines was evident from the chemical shift values of the hydroxyl proton in the ¹H-NMR spectra of the Schiff base ligands. The hydroxyl proton resonates at high frequency and thus absorbed far downfield at 13.46-11.83 ppm, reflecting the presence of hydrogen bonding between the hydroxyl proton and the imine nitrogen. In the p-substituted aniline analogues of the Schiff base, a plot of the chemical shift values of the hydroxyl proton against the Hammett's substituent parameters gave a linear correlation between the electronegativities of the substituents and the chemical shift values. The nitro group with the highest electronegativity caused the least deshielding of the hydroxyl proton and thus absorbed upfield compared to the less electronegative substituents such as the CH3 and OCH3 analogues. Likewise, in the solid state infrared spectra of the ligands, the hydroxyl stretching band of the ortho-hydroxyl Schiff base ligands was observed as a very broad band and at much lower frequency, 3100-2100 cm⁻¹, indicating the existence of strong intramolecular hydrogen bonding. In the same vein, ¹H- and ¹³C-NMR spectral data for the Schiff base ligands indicated that the prepared compounds exist in the enol form in aprotic solvent, chloroform. The methine proton appeared as singlet and there was no carbonyl signal in the ¹³C-NMR spectra of the Schiff base ligands. This was supported by the infrared data having no vibrational band attributable to the carbonyl stretching of the keto-form of the Schiff base ligands in solid state. However, the UV/Visible study of the Schiff base ligands in protic solvent, methanol, suggested the existence of some of the Schiff base ligands in keto-enol form. A band at greater than 400 nm was observed in the UV/Visible spectra of the ligands and this has been attributed to the presence of the keto form of orthohydroxyl Schiff base ligands in solution. A plot of the molar absorptivity (ε) of the band at greater than 400 nm against Hammett substituent parameters revealed that the intensity of the bands increased with the electronegativity of the substituents. The Cu(II) complexes of salicylaldehyde, o-vanillin and a few p-vanillin based Schiff base ligands are reported in this work. It was observed that introduction of Cu(II) ions into the ligand system resulted in the hydrolysis of the imine band in few cases. All the isolated complexes have been characterized by elemental analysis, conductivity measurement, infrared and UV/Visible spectral data. The structures of three of the Cu(II) complexes were further confirmed by X-ray single crystal diffraction. The Schiff base ligands either coordinated as neutral base through the imine nitrogen or via the imine nitrogen and the phenolic oxygen atoms. In addition, the benzimidazole-based and ovan-2-pico analogues equally coordinated through the imidazole N-3 nitrogen and the azine nitrogen respectively; thus acted as tridentate. In general, the synthesized Cu(II) complexes fell into seven categories viz: [Cu(LH)Cl(H₂O)]Cl; [Cu(LH)₂Cl₂].xH₂O; [CuL₂]; [Cu₂L₂]; [Cu(LH)Cl(H₂O)]Cl; and [MLCl]. The Cu(II) complexes of the form, M(LH)₂Cl₂.xH₂O were either 1:1 or non-electrolyte in methanol and DMF. The third category, CuL₂, was however, non-electrolyte existing as neutral four coordinate Cu(II) complexes. X-ray single crystal structure of Cu(II) complexes derived from the ammonia-based Schiff bases revealed a square planar geometry for the complexes and this agreed with the planar geometry that has been reported for Cu(II) complexes of N-arylsalicylaldimines of the type studied in this work. The complexes, [Cu₂L₂], resulted from the ortho-hydroxyaniline analogues and were polymeric with the Schiff base ligands coordinating to the Cu(II) ions as tridentate dibasic via the imine nitrogen, phenolic oxygen and the aminophenolic oxygen atoms. Cu(II) complexes prepared from ovan-2-ampy and ovan-2-pico Schiff bases were of the forms [Cu(LH)Cl(H₂O)]Cl and [CuLCl] respectively. The X-ray crystal structure of [Cu(ovan-2- pico)Cl] revealed a four-coordinate square planar geometry for the complex. In the same vein, the o-phenylenediamine complexes were of the form [Cu(L)(H₂O)], with the X-ray crystal structure of [Cu(bis-ovanphen)(H₂O)] revealing a square pyramidal geometry. The Schiff base ligands and the isolated Cu(II) complexes have been evaluated for their antimicrobial activity against three bacterial strains (Escherichia coli ATCC® 8739™*, Staphylococcus aureus subsp. aureus ATCC® 6538™* and Bacillus subtilis subsp. spizizeni ATCC® 6633™*) and one fungal strain, Candida albicans ATCC® 2091™*, using agar disc diffusion and broth dilution techniques. It was observed that the presence of the methoxyl group at the ortho-position of the aldehyde moiety of the Schiff base ligands enhanced the activity of the ligand tremendously and thus the o-vanillin analogues showed the highest potency against the tested organisms. In addition, the hydroxyaniline analogues were equally the most promising of all the substituted aniline based Schiff bases. The o-vanillin analogues of the aminopyridines and aminomethylpyridines also exhibited significant activity against the tested organisms. All the 2-aminobenzimidazole series were active against the tested organisms. It should be noted that E. coli was the least susceptible of all the microorganisms while the highest potency was exhibited against the fungus of choice, Candida albicans. Lastly, chelation of the Schiff base ligands with Cu(II) ions did not have significant influence on the activity of the free ligands.

This study investigates the coordination modes of multidentate N,O-donor ligands toward the [ReVO]3+ and fac-[ReI(CO)3]+ cores. The reactions of trans-[ReOX3(PPh3)2] (X = Cl, Br) with 4-aminoantipyrine (H2pap) were studied, and the complexes cis-[ReX2(pap)(H2pap)(PPh3)](ReO4) were isolated. The X-ray crystal structures show that both complexes display a distorted octahedral geometry around the central rhenium atom, and are mirror images of each other. The ligand pap is coordinated monodentately through the doubly deprotonated amino nitrogen as an imide, and H2pap acts as a neutral bidentate chelate, with coordination through the neutral amino nitrogen and the ketonic oxygen. The attempted synthesis of the potentially hexadentate Schiff base ligand 1,2-bis(2-{(Z)- [(2-hydroxyphenyl)imido]methyl}phenoxy)benzene from the condensation reaction of 2- (2-((2-aminophenoxy)methyl)benzyloxy)benzenamine and salicylaldehyde produced the zwitterion derivative (H2ono) of 2-{(Z)-[2-(hydroxyphenyl)imino]methyl}phenol. The tridentate Schiff bases (Z)-2-(2-aminobenzylideneamino)phenol (H3onn) and (Z)-2-(2- (methylthio)benzylideneamino)phenol (Hons) were prepared in a similar manner. The reaction of H2ono with trans-[ReOBr3(PPh3)2] surprisingly led to the isolation of the rhenium(III) complex [ReBr(PPh3)2(ono)], in which ono acts as a dianionic tridentate ligand. The reaction of H3onn with trans-[ReOBr3(PPh3)2] produced the imidorhenium(V) complex salt [ReBr(PPh3)2(onn)]Br, in which onn is coordinated as a trianionic tridentate imidoiminophenolate. The reaction of Hons with [Re(CO)5Br] led to the further decomposition of the Hons ligand, and the rhenium(I) product fac- [Re(CO)3(ons)(Hno)] (Hno = 2-aminophenol) was isolated, with ons coordinated as a monoanionic bidentate chelate (with a free SCH3 group), and Hno present as a neutral monodentate ligand with coordination through the amino nitrogen atom. Abstract Nelson Mandela Metropolitan University vi The reactions of the potentially hexadentate ligand N,N’-{ethane-1,2- diylbis[nitrilomethylidenebenzene-1,2-diyl]}bis(2-aminobenzeneimine) (H2ted) with rhenium(V) starting materials resulted in the decomposition of the H2ted molecule to give different coordinated multidentate ligands coordinated to the rhenium(V) centers. In the reaction of H2ted with trans-[ReOBr3(PPh3)2] in ethanol, the highly unusual ‘3+3’ complex cation [Re(tnn)(Htnn)]Br2 was isolated, in which tnn is coordinated as a tridentate imido-imino-amine, and Htnn is present as a tridentate monoanionic amidoimino- amine chelate (H2tnn = N-(2-aminophenylmethylidene)ethane-1,2-diamine). With trans-[ReO2(py)4]Cl as starting material, the neutral complex [ReO(dne)] was found, in which the tetradentate chelate dne acts as a triamido-imine. The reaction of cis- [ReO2I(PPh3)2] with H2ted led to the formation of the monocationic complex salt [ReO(ane)]PF6, with ane acting as a tetradentate dianionic diamidodiimine (H2ane = N,N’-bis[(2-aminophenyl)methylidene] ethane-1,2-diamine). The seven-coordinate rhenium(III) complex cation [Re(dhp)(PPh3)2]+ (H2dhp = 2,6-bis(2- hydroxyphenyliminomethyl)pyridine) was isolated as the iodide salt from the reaction of cis-[ReO2I(PPh3)2] with H2dhp in ethanol and as the perrhenate salt from the reaction of trans-[ReOBr3(PPh3)2] with H2dhp in methanol. Both products result from a disproportionation reaction with perrhenate also being produced in the process. The complex fac-[Re(CO)3(H2dhp)Br] was prepared from [Re(CO)5Br] and H2dhp in toluene, where the H2dhp ligand acts as a neutral bidentate NN-donor chelate. The metal is coordinated to three carbonyl donors in a facial orientation, to a neutral imino nitrogen, a pyridinic nitrogen and a bromide.

When Zharkov and Blinkov ([ZB93]) applied the classical ideas of involutive systems originating from the theory of partial differential equations (c.f. [Ja29],[Po78]) to the computation of Gröbner bases (c.f. [Bu65],[BW93]) their theory seemed to be a rather marginal concept. But due to the opportunity of gaining a faster version for one of the most frequently applied algorithms the method came into the focus of computer algebra research (c.f. [Ap95], [GB95], [GS95], [Ma95]). It turned out that Pommaret bases are not only of interest for fast implementations (c.f. [ZB93]) but that they are also a point of contact of different theories which were investigated intensively for a long time. So, the theory of Pommaret bases enables the exchange of useful ideas between the theories as well as it benefits itself from the relationships. A certain similarity of the Zharkov/Blinkov method and the Kandri-Rody/Weispfenning closure technique motivates the study of commutative polynomial rings from a non-commutative point of view. The theory of Pommaret bases can be presented in an algebraic way using the Gröbner theory of graded structures. Here we will present the straight forward generalization of Pommaret bases to the class of algebras of solvable type. Under the non-commutative grading most calculations are pushed back to the free non-commutative polynomial ring. This provides a link to the theory of term rewriting and the Zharkov/Blinkov method appears as an application of the prefix reduction/saturation technique of Madlener and Reinert (c.f.[MR93]) with a restricted saturation. The restricted saturation has its natural origin in the syzygy theory and heavily improves the termination behaviour in the particular case of Pommaret bases. So, it seems to be worth to investigate the effect of splitting the saturation step also for similar term rewriting problems. The main result of this paper consists in the presentation of a termination condition for the Zharkov/Blinkov method providing an alternative algorithm for the computation of ordinary Gröbner bases which terminates for arbitrary ideals in the case of generalized degree compatible term orders.

No description available.

No description available.

Ingeniero Civil Industrial / Uno de los elementos primordiales en la investigación financiera, sin importar el propósito que se tenga, es la necesidad de contar con datos confiables y reales que permitan llevarlas a cabo. Sin embargo, hoy en día es difícil acceder a los datos que forman parte del mercado financiero, más aún, el tiempo que se utiliza en su recolección no es despreciable, haciendo finalmente que se pierda la motivación por el tema. Es por ello que nace la necesidad de crear sistemas automatizados que capturen datos financieros relevantes. Esta memoria se centra en la creación de un sistema de información que se encargue de capturar y proveer datos financieros relevante para los profesores, investigadores y alumnos que participan en el Centro de Finanzas del Departamento de Ingeniería Civil Industrial de la Universidad de Chile. Específicamente, mediante el diseño de una Aplicación Web en donde a través de un software se recopilan los datos necesarios y luego se muestran en la plataforma. Para esto se busca hacer un levantamiento de requerimientos, el diseño de los sistemas de información apropiados y la generación de un software que permita recopilar los datos. Hay que tener en consideración, que algunos datos no pueden ser almacenados directamente al no estar en una pagina web, como lo son los de la SBIF, por lo que se almacenan las URLs de los archivos en que están los datos. La metodología utilizada consiste en la recolección de los datos que necesitan o podrían necesitar en el futuro los miembros del Centro de Finanzas. Luego, se diseñan y construyen los sistemas de información apropiados, los que consideran varios filtros al momento de insertar datos para asegurar la calidad de estos. Por último se documenta el sistema permitiendo que a futuro pueda ser extendido a otras necesidades, por lo que su diseño e implementación tendrá que estar pensado para la escalabilidad que se pueda presentar. El proceso de extracción de datos se lleva a cabo, mediante la utilización de Crawlers, conformados de dos tipos de objetos, triggers y jobs. Los triggers se encargan de realizar las tareas que se necesitan cuantas veces sea necesario, puede ser en forma periódica. Y los jobs, de ejecutar cualquier tarea que se desee recalendarizar, en este caso los crawlers que recopilan datos financieros. En caso de que estos fallen, se vuelve a intentar en otro momento, y, si es que vuelve a fallar, se notifica al administrador vía correo electrónico, que cierta tarea no se ha ejecutado exitosamente. Una vez capturados los datos, el sistema sigue funcionando continuamente recopilando y actualizando nuevos datos del día a día para mantener la base de datos siempre actual, ayudando a que el sistema cumpla con su fin principal de mantener informados a todos los interesados. A la fecha de esta memoria, contabilizando data histórica más la extraída, se tienen más de 500 mil datos. Finalmente, gracias a la implementación de este sistema se logra tener acceso rápido a datos financieros importantes, cumpliéndose con los objetivos de este proyecto.

Material educativo para acceder, identificar y seleccionar información disponible en bases de datos del Centro de Información.