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Leitura da web em português em ambiente de aprendizado sem-fim
(Universidade Federal de São Carlos, 2016-01-04) Duarte, Maisa Cristina; Hruschka Júnior, Estevam Rafael; https://lattes.cnpq.br/2097340857065853; https://lattes.cnpq.br/7878297791371477
NELL is a computer system that has the goal of learn to learn 24 hours per day, continuously and learn more an better than the last day, to perform the knowledge base (KB). NELL is running since January 12 of 2010. Furthermore, NELL goals is have hight precision to be able to continue the learning. NELL is developed in macro-reading context, because this NELL needs very much redundancy to run. The first step to run NELL is to have an big (all-pairs-data). An all-pairs-data is a preprocessed base using Natural Language Processing (NLP), that base has all sufficient statistics about a corpus of web pages. The proposal of this project was to create a instance of NELL (currently in English) in Portuguese. For this, the first goal was the developing an all-pairs-data in Portuguese. The second step was to create a new version of Portuguese NELL. And finally, the third goal was to develop a coreference resolution hybrid method focused in features semantics and morphologics. This method is not dependent of a specific language, it is can be applied for another languages with the same alphabet of Portuguese language. The NELL in Portuguese was developed, but the all-pairs-data is not big enough. Because it Portuguese NELL is not running for ever, like the English version. Even so, this project present the steps about how to develop a NELL in other language and some ideas about how to improve the all-pairs-data. By the way, this project present a coreference resolution hybrid method with good results to NELL.
Estudo da formação e isolamento de heterocomplexos constituídos pela combinação entre 4,4’,4’’,4’’’- tetracarboxiftalocianina de ferro ou 4,4’,4’’,4’’’- tetrassulfoftalocianina de ferro e tetrakis (N-metil- 4-piridil) porfirina de ferro e aplicação em filmes LbL”
(Universidade Federal de São Carlos, 2016-01-04) Silva, Rebecca Nogueira e; Moreira, Wania da Conceição; https://lattes.cnpq.br/3016270106775634; https://lattes.cnpq.br/6480044182214835
The great interest in supramolecular assemblies between porphyrins and phthalocyanines has growing lately due to the enhancement on chemical and physical properties compared to individual units. Ionic assemblies with metalloporphyrins and metallophthalocyanines grafted with ionic substituents of opposite charges stand out due to favorable formation and electronic density coupling between the macrocycles rings in a face-to-face array. Most of the reports in the literature on these kinds of arrangements is limited to its solution behavior. The main goal of this work were to synthesize and isolate heterocomplexes of 4,4’,4’’,4’’’- irontetracarboxyphthalocyanine (FeTcPc), or 4,4’,4’’,4’’’- irontetrasulfophthalocyanine (FeTsPc), with irontetrakis(n-metil-4-pyridyl)porphyrin (FeTMPyP). Three tetrapyrrolic macrocycles precursors were synthesized and characterized, and the heterocomplex formation was investigated by spectroscopic titration of FeTMPyP aqueous solution with FeTsPc or FeTcPc. The heterocomplex stoichiometry was determined by Job’s method. The stoichiometry of the heterocomplexes was not affected by the substituents and dyads FeTsPc/FeTMPyP and FeTcPc/FeTMPyP were obtained in both cases. For the first time, dyads were isolated from solution, and characterized by infrared (IR) and ultraviolet-visible (UV-Vis) spectroscopies, thermal analysis, and cyclic voltammetry. A significant change in the macrocycles electronic levels were observed due to the electronic coupling in a face-to- face arrangement. FeTsPc/FeTMPyP dyad presented an extensive orbital mixing, higher than FeTcPc/FeTMPyP dyad. IR analysis showed an additional interaction through coordination of bridged ligand between the metallic centers. Thermogravimetric analysis of the heterocomplexes showed a different degradation profile of the macrocycles in each dyad, which indicated that interaction between the macrocycles in each heterocomplex might be different. Electrostatic Layer-by-Layer technique (LbL) was applied and thin films of macrocycle precursors, mixed films (by intercalating precursor layers), and dyads were obtained. FeTcPc, FeTsPc, and FeTMPyP macrocycles exhibited a linear transfer up to 48 bilayers. The mixed film between FeTsPc and FeTMPyP showed similar spectral properties to FeTsPc/FeTMPyP dyad in solution indicating that similar macrocycles array in the mixed films over the deposition. The cyclic voltammetry of the macrocycles and dyads in solution showed that, in both cases, metallic centers electronic densities were affected by dyad formation, but macrocyclic redox processes was more affected in FeTcPc/FeTMPyP. The immobilization shifted the electrochemical redox process for cathodic potentials. The results indicated that interaction between the macrocycles in the dyads occur via two mechanisms, by ligand bridged interaction between the metallic centers, and by electrostatic attraction of the peripheral substituents.
Resolução das contradições e a evolução da atividade no processo de desenvolvimento de produtos (PDP) : uma abordagem a partir da teoria da atividade
(Universidade Federal de São Carlos, 2016-01-04) Baumgartner, Luis Fernando; Menegon, Nilton Luiz; https://lattes.cnpq.br/5461487552981919; https://lattes.cnpq.br/5785260456061201
The escalation of the competitiveness in the auto parts segment has been driving their companies to deep search better results. In this scenario, the product development process (PDP) has been of paramount importance. With its multidisciplinary characteristic, it articulates simultaneously different rationalities and actors who have built on very different interpretations of their real work. Interventions aiming to enhance the PDP performance inside an organization focus on the evaluation and modification of the prescribed work. When this is the approach, they limit their scope on the evaluation of the procedures and stated workflows and use a deterministic assumption which imposes just one single way to have the work done. This research proposes the Activity Theory as an adequate theoretical framework to deal with work redesign and shed light on the results from a case study where the first stage of the PDP was studied. We concluded that the activity system model proposed by Engeström identifies and reveals contradictions, which once in the equation, can really enhance PDP performance.