Le problème de représentation automatique de la signification logique des énoncés ambigus en langage naturel a suscité l'intérêt des chercheurs dans le domaine de la sémantique computationnelle et de la logique. L'ambiguïté dans le langage naturel peut se manifester au niveau lexical / syntaxique / sémantique de la construction de sens, ou elle peut être causée par d'autres facteurs tels que la grammaticalité et le manque de contexte dans lequel la phrase est effectivement prononcée. L'approche traditionnelle Montagovienne ainsi que ses extensions modernes ont tenté de capturer ce phénomène en fournissant quelques modèles qui permettent la génération automatique de formules logiques. Cependant, il existe un axe de recherche qui n'est pas encore profondément étudié: classer les interprétations d'énoncés ambigus en fonction des préférences réelles des utilisateurs de la langue. Ce manque suggère une nouvelle direction d'étude qui est partiellement explorée dans ce mémoire en modélisant des préférences de sens en alignement avec certaines des théories de performance préférentielles humaines bien étudiées disponibles dans la littérature linguistique et psycholinguistique.Afin d'atteindre cet objectif, nous suggérons d'utiliser / d'étendre les Grammaires catégorielles pour notre analyse syntaxique et les Réseaux catégoriels de preuve comme notre analyse syntaxique. Nous utilisons également le Lexique Génératif Montagovien pour dériver une formule logique multi-triée comme notre représentation de signification sémantique. Cela ouvrirait la voie à nos contributions à cinq volets, à savoir, (i) le classement de la portée du quantificateur multiple au moyen de l'opérateur epsilon de Hilbert sous-spécifié et des réseaux de preuve catégoriels; (ii) modéliser la gradation sémantique dans les phrases qui ont des coercitions implicites dans leurs significations. Nous utilisons un cadre appelé Montagovian Generative Lexicon. Notre tâche est d'introduire une procédure pour incorporer des types et des coercitions en utilisant des données lexicales produites par externalisation ouverte qui sont recueillies par un jeu sérieux appelé JeuxDeMots; (iii) l'introduction de nouvelles métriques sensibles au référent basées sur la localité pour mesurer la complexité linguistique au moyen de réseaux de preuve catégoriels; (iv) l'introduction d'algorithmes pour l'achèvement des phrases avec différentes mesures linguistiquement motivées pour sélectionner les meilleurs candidats; (v)l'intégration de différentes métriques de calcul pour les préférences de classement afin de faire d'elles un modèle unique. / The problem of automatic logical meaning representation for ambiguous natural language utterances has been the subject of interest among the researchers in the domain of computational and logical semantics. Ambiguity in natural language may be caused in lexical/syntactical/semantical level of the meaning construction or it may be caused by other factors such as ungrammaticality and lack of the context in which the sentence is actually uttered. The traditional Montagovian framework and the family of its modern extensions have tried to capture this phenomenon by providing some models that enable the automatic generation of logical formulas as the meaning representation. However, there is a line of research which is not profoundly investigated yet: to rank the interpretations of ambiguous utterances based on the real preferences of the language users. This gap suggests a new direction for study which is partially carried out in this dissertation by modeling meaning preferences in alignment with some of the well-studied human preferential performance theories available in the linguistics and psycholinguistics literature.In order to fulfill this goal, we suggest to use/extend Categorial Grammars for our syntactical analysis and Categorial Proof Nets as our syntactic parse. We also use Montagovian Generative Lexicon for deriving multi-sorted logical formula as our semantical meaning representation. This would pave the way for our five-folded contributions, namely, (i) ranking the multiple-quantifier scoping by means of underspecified Hilbert's epsilon operator and categorial proof nets; (ii) modeling the semantic gradience in sentences that have implicit coercions in their meanings. We use a framework called Montagovian Generative Lexicon. Our task is introducing a procedure for incorporating types and coercions using crowd-sourced lexical data that is gathered by a serious game called JeuxDeMots; (iii) introducing a new locality-based referent-sensitive metrics for measuring linguistic complexity by means of Categorial Proof Nets; (iv) introducing algorithms for sentence completions with different linguistically motivated metrics to select the best candidates; (v) and finally integration of different computational metrics for ranking preferences in order to make them a unique model.

Neste trabalho, sondas solvatocrômicas foram empregadas no estudo de solventes puros, misturas aquosas de solventes próticos e apróticos, líquidos iônicos e suas misturas aquosas. As sondas estudadas foram agrupadas em duas séries, cujas mudanças relevantes foram: (i) série RPMBr2: R de metila a 1-octila permitiu a variação da hidrofobicidade da sonda enquanto o pKa se manteve constante; (ii) série de merocianinas derivadas de piridina, quinolina e acridina. Isso resultou em sondas de hidrofobicidades diferentes com valores parecidos de pKa. Desta forma foi possível isolar os efeitos sobre solvatação provocados pela hidrofobicidade das sondas. As duas séries de sondas mostraram comportamentos solvatocrômicos diferentes. Uma equação modificada de Taft-Kamlet-Abboud permitiu as quantificações individuais de cada propriedade do solvente, tais como acidez, dipolaridade/polarizabilidade e hidrofobicidade para a resposta de cada sonda. O modelo de solvatação preferencial que considera explicitamente a presença de três espécies na mistura binária de solvente foi aplicado, este considera que a água, o solvente orgânico e a espécie solvente orgânico-água competem pela camada de solvatação da sonda. Os resultados deste tratamento ajudaram no entendimento das forças atuantes na solvatação, especialmente com relação aos efeitos das propriedades de ambos a sonda e o solvente, e do aumento da temperatura. Estudos preliminares de misturas aquosas de líquidos iônicos mostraram as semelhanças e as diferenças entre a solvatação por estas misturas \"verdes\" e a por misturas aquosas de álcoois. Uma aplicação do solvatocromismo para o entendimento de un fenômeno físco-químico foi apresentada: os resultados da aplicação do modelo de solvatação preferencial de sondas em misturas aquosas de tetrametiluréia foram usados para explicar o fenômeno de gelificação de proteína neste mesmo sistema de solventes. / In the present work, solvatochromic probes were employed in the study of pure solvents, binary mixtures of water with protic and aprotic solvents, ionic liquids and their aqueous binary mixtures The probes studied are classified in two series: (i) RPMBr2; where R = methyl to 1-octyl allowed increasing the hydrophobicity while maintaining the pKa constant. (ii) The second series involved derivatives of pyridine, quinoline and acridine, this allowed increasing probe hydrophobicity, while maintaining similar pKa. The two series of probes showed different solvatochromic behaviors both in pure solvents and binary solvent mixtures. A modified equation of Taft-Kamlet-Abboud allowed quantification of each solvent property, including acidity, dipolarity/polarizability and hydrophobicity to the response of each probe. The preferential solvation model which explicitly considers the presence of three species was employed; it considers the competition of water, organic solvent and the complex water-organic solvent in the probe solvation shell. The results shed light on the interactions that affect solvation, including temperature-induced desolvation. Preliminary results on aqueous ionic liquids showed the similarities and difference between solvation by these \"green\" mixtures and those of aqueous alcohols. An application of solvatochromism for understanding a physical-chemical phenomenon was presented: the results of application of preferential solvation model of probes in aqueous tetramethylurea mixtures was used to explain the gelation of the protein lysozyme in this same solvent system.

Submitted by Filipe dos Santos (fsantos@pucsp.br) on 2018-09-26T10:05:03Z No. of bitstreams: 1 Fábia Auxiliadora Pereira de Mattos Spadoto.pdf: 2218826 bytes, checksum: a415bdaff1e7fdb74668b79bec80ba43 (MD5) / Made available in DSpace on 2018-09-26T10:05:03Z (GMT). No. of bitstreams: 1 Fábia Auxiliadora Pereira de Mattos Spadoto.pdf: 2218826 bytes, checksum: a415bdaff1e7fdb74668b79bec80ba43 (MD5) Previous issue date: 2018-07-19 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The supply chain management or value chain has always had its orientation aimed at generating more value for the final customer. A recurring phenomenon has been the reduction in the number of suppliers, as a consequence of economic changes in the market or even of a natural order, and which directly affects buyer-supplier relations: some companies are excluded from supply and others are preferred. Receiving preferential treatment in relation to other companies is a desire of many organizations, but there is the condition in this relationship, before supplier satisfaction occurs, and that is directly linked to the condition of being a preferred customer. The theoretical model addressed by Hüttinger et al. (2014) was used as the theoretical anchor in this study. This dissertation aimed to analyze the factors that induce suppliers to treat some customers more preferentially than others in B2B market relations and how this association between the determinants of customer attractiveness, supplier satisfaction and preferential customer status and its antecedents . The research in question was quantitative and descriptive. Data collection was done through an electronic survey with suppliers of direct materials from the same pharmaceutical industry in Brazil. The sample consisted of 84 participants, the instrument used was an online questionnaire already validated in Germany, which had its reliability of the new structuring measured with a Crombach Alfa of 0.967. Descriptive statistics, factorial analysis and regression were used as techniques. In the analysis of the determinants of preferential treatment to the customer, there are indications that customer attractiveness and supplier satisfaction were highlights in the perception of the suppliers researched. In the preferred customer status it was noticed that the suppliers have not yet given the customer the preferential customer status. It was possible to verify that growth opportunity, operational excellence, reliability and innovation potential are factors that induce suppliers to grant preferential treatment to the customer, which confirms that there were indications that the model suggested by Hüttinger et al. (2014) in much of it is compatible with the Brazilian sample / A gestão da cadeia de suprimentos ou cadeia de valor sempre teve a sua orientação voltada a gerar mais valor para o cliente final. Um fenômeno recorrente tem sido a redução do número de fornecedores, consequência de alterações econômicas no mercado ou mesmo de ordem natural e que afeta diretamente as relações comprador-fornecedor: algumas empresas são excluídas do fornecimento e outras são preferidas. Receber tratamento preferencial, em relação a outras empresas é um desejo de muitas organizações, mas há a condição nessa relação, de antes ocorrer a satisfação do fornecedor, e que está diretamente ligada à condição de ser um cliente preferencial. O modelo teórico abordado por Hüttinger et al., (2014) foi utilizado como âncora teórica neste estudo. Esta dissertação teve como objetivo analisar os fatores que induzem os fornecedores a tratarem alguns clientes mais preferencialmente do que outros em relações de mercado B2B e como se dá essa associação entre os determinantes atratividade do cliente, satisfação do fornecedor e status do cliente preferencial e seus antecedentes. A pesquisa em questão teve o enfoque quantitativo e descritivo. A coleta de dados foi por meio de uma “survey” eletrônica com fornecedores de materiais diretos de uma mesma indústria farmacêutica no Brasil. A amostra foi constituída de 84 participantes, o instrumento utilizado foi um questionário online já validado na Alemanha, que teve sua confiabilidade da nova estruturação mensurada com um Alfa de Crombach de 0,967. Foram utilizadas como técnicas a estatística descritiva, análise fatorial e regressão. Na análise dos determinantes do tratamento preferencial ao cliente, há indícios que atratividade do cliente e satisfação do fornecedor foram destaques na percepção dos fornecedores pesquisados. No status do cliente preferencial percebeu-se que os fornecedores ainda não concederam o status de cliente preferencial a esse cliente. Foi possível verificar que oportunidade de crescimento, excelência operativa, confiabilidade e potencial de inovação são fatores que induzem os fornecedores a concederem tratamento preferencial ao cliente, fato que corrobora que houve indicativos que o modelo sugerido por Hüttinger et al., (2014), em grande parte é compatível com a amostra brasileira

Made available in DSpace on 2016-04-26T20:22:35Z (GMT). No. of bitstreams: 1 Marina Amaral Egydio de Carvalho.pdf: 2338211 bytes, checksum: 7f8ff1b67d179ab37fbeef8b2359b658 (MD5) Previous issue date: 2014-02-17 / preferential trade agreements negotiated by South Africa, Brazil/Mercosur, China, U.S.A, India, Russia and the European Union. Such an analysis is relevant mostly because, after the creation of the WTO and of the Agreement on Technical Barriers to Trade (TBT), several preferential trade agreements were negotiated, thus, extending or creating new rules on technical barriers its signatory countries. This study suggests some conclusions on how Brazil could negotiate this subject in future preferential trade agreements. Additionally, it suggests patterns and standards that may followed in future negotiations with the abovementioned countries. One of the scope of the work was to analyze how preferential trade agreements are related to the TBT Agreement, which are the similarities between the group of agreements analyzed, which were the new topics regulated in the trade agreements when compared to the WTO, which are the preferred policies of the subject countries and how Brazil could take advantage of this empirical analysis in future negotiations. The main purpose of this work is to encourage Brazil to develop a trade policy for negotiation of this specific topic, which may be actually followed and that, unless this is the actual trade objective of the negotiation, is not translated as a mere repetition of rules already in place / Esse trabalho analisa as regras sobre barreiras técnicas ao comércio constantes nos acordos preferenciais de comércio celebrados por África do Sul, Brasil/Mercosul, China, EUA, Índia, Rússia e União Europeia. Essa analise é relevante porque, após a criação da OMC e do Acordo sobre Barreiras Técnicas (TBT), diversos acordos preferenciais foram concebidos, estendendo ou aplicando novas regras sobre barreiras técnicas aos países partes dos acordos. Esse estudo sugere ponderações sobre como o Brasil pode negociar este tema em futuros acordos preferenciais de comércio. Principalmente, sugere padrões e similitudes que poderão ser observadas em negociações com os países acima mencionados. Durante esse trabalho analisou-se como os acordos preferenciais de comércio se relacionam com o Acordo TBT, quais as semelhanças entre os grupos de acordos analisados, quais os avanços regulatórios se comparados com as políticas previstas no acordo da OMC, quais as políticas preferidas dos países objeto do trabalho e como o Brasil pode aproveitar dessa análise empírica para se beneficiar em negociações futuras. O maior propósito desse trabalho é incentivar o Brasil a conceber uma política comercial de negociação, especifica para o tema de barreiras técnicas ao comércio, que possa ser aproveitada e que não se traduza pela mera repetição de normas já vigentes, a menos que este seja o efetivo objetivo comercial proposto

Este projeto tem por objetivo analisar o potencial comercial brasileiro no contexto da Cooperação Sul-Sul, através do estudo dos Acordos Comerciais do Brasil com a África do Sul e a Índia (Mercosul – SACU e Mercosul – Índia). O presente trabalho possui dois propósitos principais – analisar o status quo e o perfil dos acordos comerciais em pauta entre o Brasil, África do Sul e a Índia e sequencialmente verificar o potencial de aprofundamento do atual Acordo Mercosul – Índia rumo a uma futura Área de Livre Comércio como forma efetiva de fortalecimento econômico no contexto da estratégia brasileira frente aos países do IBAS e da Cooperação Sul-Sul. Para estudar os Acordos de Preferência Comercial selecionados, se utilizará a metodologia multicritério de análise das ofensividades e sensibilidades dos principais produtos brasileiros exportados e importados com estes mercados, o grau de abrangência, profundidade e a cobertura de tais acordos. Por fim, pretende-se inferir considerações gerais sobre o fortalecimento comercial, econômico e político no âmbito da Cooperação Sul-Sul que se poderia obter a partir da ampliação de tais acordos. / This project aims to analyze the Brazilian commercial potential in the context of South-South Cooperation, through the study of Brazil's Trade Agreements with South Africa and India (Mercosur - SACU and Mercosur - India). This work has two main purposes - to analyze the ‘status quo’ and the profile of trade agreements at issue between Brazil, South Africa and India, and sequentially verify the potential of deepening the current Mercosur Agreement - India towards a future Free Trade Area as an effective form of economic empowerment in the context of the Brazilian strategy at IBSA countries and in the South-South Cooperation. To study the selected trade preference agreements, the methodology approach to be used will be the multiple-criteria analysis of offensiveness and sensitivities of the main Brazilian products exported and imported with these markets, the degree of breadth, depth and coverage of such agreements. Finally, the intention is to infer general considerations on the commercial, economic and political empowerment within the framework of South-South cooperation that could be obtained from the expansion of such agreements.

Des écoulements matriciels et des flux préférentiels peuvent se produire concurremment dans le même sol. Ces deux régimes d’écoulements se manifestent par des empreintes de flux caractéristiques qu’on peut visualiser par des essais de traçage. Afin d’extraire l’information quantitative des essais de traçage un grand nombre de méthodes existe. On peut, entre autre, décrire les empreintes de traceur par ce qu’on appelle la fonction de couverture, c’est à dire le pourcentage de région teintée par un traceur coloré en fonction de la profondeur du sol. En utilisant la statistique des valeurs extrêmes cette fonction peut être réinterprétée comme une fonction exprimant la probabilité de trouver le traceur à une profondeur donnée. Ainsi, la fonction de probabilité à deux paramètres 1 – H, H étant la distribution de Pareto généralisée, peut être ajustée. Le paramètre de forme de cette fonction est utilisé comme indice de risque de propagation verticale des solutés. Nous avons effectué des essais de traçage au Bleu Brillant FCF sur trois sites différents : dans une forêt d’épicéa dans le sud-est de l’Allemagne, dans une forêt tropicale humide montagnarde en Équateur et sur un champ agricole au sud de la France. Nous avons examiné la capacité de l’indice de risque à rassembler l’information principale des essais de traçage et à caractériser les empreintes de flux dans des sols différents, sous conditions aux limites diverses. Nos résultats indiquent que l’indice de risque est, dans une certaine mesure insensible aux changements des conditions aux limites (comme l’intensité d’irrigation). Par contre, l’humidité initiale du sol semble influencer cet indice de façon importante. L’ajustement des paramètres de la fonction Pareto généralisée s’avère difficile si la fonction de couverture fluctue ou ne décroît pas de manière monotone. Ceci peut être dû à la tortuosité des chemins d’écoulement, à la variation des mécanismes de flux ou aux changements de propriétés physiques du sol (stratification). Ainsi, dans des sols stratifiés nous avons restreint l’analyse à la partie inférieure du profil de sol. En effet, étant donné que la théorie de l’indice de risque est basée sur les valeurs extrêmes de propagation verticale de solutés c’est la partie inférieure qui est la plus intéressante. Nous proposons de combiner les deux paramètres de la fonction Pareto généralisée et d’utiliser la distribution 1 – H complète afin d’estimer le risque de propagation verticale des solutés dans le sol. Bien que l’indice de risque montre une certaine invariance vis-à-vis du changement des conditions aux limites il n’est pas un paramètre intrinsèque de sol. Comme le régime d’écoulement dans un même sol peut être dominé soit par le flux matriciel soit par le flux préférentiel le risque de propagation verticale des solutés change. Ceci est une réalité physique et non un défaut dans la théorie de l’indice de risque. Les paramètres de la fonction de Pareto généralisée capturent le régime d’écoulement dominant représenté par les empreintes du traceur. En prenant en compte les conditions aux limites de l’essai de traçage comme l’intensité d’irrigation, le traceur utilisé, l’humidité initiale du sol ou la nature de la végétation (pérenne ou saisonnière, type d’enracinement) il est ainsi possible de comparer des sites différents ou des résultats obtenus sur le même site sous conditions aux limites différentes et d’estimer le risque de propagation verticale de solutés. L’analyse d’image d’empreintes de flux basée sur le risque de propagation verticale de solutés a révélé l’existence d’écoulements préférentiels sur le site allemand. Afin de comprendre les mécanismes de flux ainsi que les impacts éventuels des flux préférentiels sur la chimie du sol nous avons analysé la texture du sol, la densité racinaire, la densité du sol, la concentration des cations échangeables, le pH, et les teneurs en C et N total dans les chemins préférentiels et la matrice du sol. Les résultats de la modélisation indiquent que sur ce site les racines constituent les chemins préférentiels et créent les écoulements le long des macropores, surtout dans la partie supérieure du sol. Dans la partie inférieure la densité racinaire diminue et l’infiltration hétérogène à partir des chemins préférentiels dans la matrice provoque un écoulement non-uniforme. Nous n’avons constaté aucune différence significative de texture, mais des différences de densité du sol dans les chemins préférentiels par rapport à celle de la matrice. Ceci est probablement dû à la quantité de matière organique plus élevée dans les chemins préférentiels. Nous avons également trouvé des pH plus acides, plus de Ca, plus de Mg, et plus de C et de N dans les chemins préférentiels. Comparé à la matrice, des quantités plus importantes d’Al et de Fe (mais de petites quantités absolues) ont été trouvés dans la partie inférieure du sol où l’écoulement préférentiel le long des macropores créés par les racines diminue et le flux matriciel hétérogène domine. Ces propriétés chimiques distinctes peuvent s’expliquer par l’activité racinaire et la translocation de solutés et du carbone organique dissous (COD) le long des chemins préférentiels. Le temps de contact entre le COD et le sol étant réduit il est transporté plus bas dans le profil où il peut potentiellement créer des complexes organo-minéraux. Ainsi, l’écoulement préférentiel est un mécanisme qui peut promouvoir la séquestration de C en sous-sol et n’influence pas uniquement son environnent immédiat, mais aussi les horizons sous-jacents. Un des acquis majeurs de cette thèse est le nombre important d’images d’empreintes de flux issues des sols différents. Dans les études qui suivront les méthodes récentes de réduction de dimensionnalité peuvent être employées afin de trouver d’éventuelles structures de basse dimensionnalité dans ces images / Matrix flow and preferential flow can occur concurrently in the same soil. Both flow regimes produce typical flow patterns that can be visualised in dye tracer experiments. To extract quantitative information from dye tracer studies a vast variability of approaches exists. One of them is to describe dye patterns by the so called dye coverage function, i.e. the percentage of stained area per soil depth. Based on extreme value statistics the dye coverage function can be reinterpreted as a probability function to find the tracer in a certain depth. Therefore, the two-parametric probability distribution 1 – H, H being the generalised Pareto distribution, can be fitted to the dye coverage function. The form parameter of this distribution serves as a risk index for vertical solute propagation. We did tracer experiments with Brilliant Blue FCF at three different study sites: in a Norway spruce forest in southeast Germany, in a tropical mountain rainforest in southern Ecuador and on an agricultural field in southern France. We tested the ability of the risk index to summarise main information obtained in dye tracer studies and characterise flow patterns in different soils under varying boundary conditions. Our results suggest that the risk index is to some degree invariant to changing experimental conditions (such as irrigation rate). The initial soil moisture, however, seems to have a large influence on the risk index. It is difficult to adjust the parameters of the generalised Pareto distribution when the dye coverage function fluctuates or does not decrease monotonically. This might be due to tortuosity of paths, varying flow mechanism or changing soil physical properties (stratification). Thus, in stratified soil, we restricted the analysis to the lowest part of the profile. Since the theory of the risk index is based on extreme values of vertical solute propagation it is the lowest part of the profile that is the most interesting. We propose to combine the two parameters of the generalized Pareto distribution and to use the complete distribution 1 - H to estimate the risk of vertical solute propagation in soils. Despite a certain resistance to changes of experimental conditions, the risk index is not an intrinsic soil parameter. Since the flow regime in the same soil can be dominated either by preferential flow or by uniform matrix flow, the risk of vertical solute propagation will change. It is a physical reality and not a default in the risk index theory. The adjusted parameters of the generalised Pareto distribution will capture the dominant flow regime as reflected by tracer flow patterns. Bearing in mind the boundary conditions of the tracer experiment like irrigation rate, the tracer employed, soil initial moisture or type of vegetation (permanent or seasonal, deep rooted or shallow rooted) it is possible to compare different study sites or to consider the same site at different boundary conditions and to access the risk of vertical solute propagation. Pattern analysis based on the risk index for vertical solute propagation revealed the occurrence of preferential flow at the German study site. To gain insight in flow mechanisms and possible impacts of preferential flow on soil chemistry we analysed soil texture, fine root density, soil bulk density, exchangeable cations, pH and total C and N contents in preferential flow paths and soil matrix. Results from linear mixed-effects models suggested that at this study site roots constituted main preferential flow paths and induced macropore flow, especially in the topsoil. In the subsoil root density decreased and inhomogeneous infiltration from preferential flow paths into the soil matrix caused non-uniform flow. There were no textural differences between the flow domains, but smaller bulk densities in preferential flow paths. This is probably due to a higher soil organic matter content in preferential flow paths. We found smaller pH values, more Ca, more Mg, more C and more N in preferential flow paths. Compared to the adjacent soil matrix, more Al and more Fe (but small absolute amounts) were found in the subsoil where macropore flow along root channels decreases and heterogeneous matrix flow dominates. These distinct chemical properties can be explained by root activity and translocation of solutes and DOC (dissolved organic carbon) via preferential flow paths. During transport along preferential flow paths contact time between DOC and soil is reduced so that DOC is transported to greater depth where it potentially forms organo-mineral associations. If this holds true, preferential flow is a mechanism that promotes C sequestration in subsoil and does not only influence its immediate environment around paths, but also underlying subsoil horizons. A major outcome of this thesis is the large number of images of flow patterns from different soils. Further studies could employ recent dimensionality reduction techniques to investigate whether there is a low dimensional structure underlying these images / Matrixfluss und präferentieller Fluss können in ein und demselben Boden gleichzeitig auftreten. Beide Fließregime erzeugen charakteristische Fließmuster, die in Versuchen mit Farbtracern sichtbar gemacht werden können. Es existiert eine Reihe von Methoden, um Tracerversuche quantitativ auszuwerten. Eine davon ist die Beschreibung der Fließmuster durch die so genannte Deckungsgradfunktion, den Anteil der gefärbten Fläche pro Tiefe. Die Methoden der Extremwertstatistik erlauben eine Neuinterpretation der Deckungsgradfunktion als eine Wahrscheinlichkeitsfunktion, den Tracer in einer bestimmten Tiefe anzutreffen. Demzufolge kann die zweiparametrige Wahrscheinlichkeitsfunktion 1 – H (H: verallgemeinerte Paretoverteilung) an die Deckungsgradfunktion angepasst werden. Der Formparameter dieser Verteilung dient als Risikoindex für vertikale Ausbreitung von gelösten Substanzen. Tracerversuche mit Brilliant Blue FCF wurden an drei unterschiedlichen Standorten durchgeführt: in einem Fichtenwald in Südostdeutschland, einem Bergregenwald in Südostecuador und an einem landwirtschaftlichen Standort in Südfrankreich. Es wurde überprüft, ob die wichtigsten Ergebnisse aus Tracerversuchen auf unterschiedlichen Böden und bei verschiedenen Randbedingungen mithilfe des Risikoindex beschrieben werden können. Die Ergebnisse zeigen eine gewisse Unabhängigkeit des Risikoindex von experimentellen Randbedingungen (wie z. B. Beregnungsintensität). Dagegen scheint die Bodenfeuchte eine zentrale Rolle zu spielen. Schwierigkeiten bei der Anpassung der Parameter der verallgemeinerten Paretoverteilung ergeben sich, wenn die Deckungsfunktion fluktuiert oder nicht monoton fallend ist. Dies kann möglicherweise auf die Tortuosität von Fließpfaden, variierenden Fließmechanismen oder sich verändernden bodenphysikalischen Eigenschaften (Stratifikation) zurückgeführt werden. Daher wurde die Musteranalyse in stratifizierten Böden auf den Unterboden begrenzt. Da die dem Risikoindex zugrunde liegende Theorie auf den Extremwerten der vertikalen Ausbreitung von gelösten Stoffen basiert, gilt das Hauptinteresse dem untersten Teil des Bodenprofils. Wir schlagen vor, die beiden Parameter der verallgemeinerten Wahrscheinlichkeitsverteilung zu nutzen, um das Risiko der vertikalen Ausbreitung von gelösten Stoffen in Böden abzuschätzen. Obwohl der Risikoindex eine gewisse Toleranz gegenüber sich ändernden Randbedingungen zeigt, ist er kein intrinsischer Bodenparameter. Da das Fließgeschehen in ein und demselben Boden sowohl vom Matrix- als auch vom präferentiellen Fluss dominiert werden kann, ändert sich das Risiko der vertikalen Ausbreitung von gelösten Stoffen. Dies ist physikalische Realität und kein Fehler in der Theorie des Risikoindex. Die angepassten Parameter der verallgemeinerten Paretoverteilung erfassen das durch den Tracer sichtbar gemachte dominante Fließregime. Unter der Berücksichtigung der Randbedingungen des Tracerexperiments wie Beregnungsintensität, des verwendeten Tracers, Bodenfeuchte oder Art der Vegetation (einjährig, mehrjährig oder perennierend, tiefwurzelnd oder flachwurzelnd) ist es möglich, unterschiedliche Standorte zu vergleichen oder denselben Standort unter verschiedenen Randbedingungen zu betrachten und das Risiko der vertikalen Ausbreitung von gelösten Stoffen abzuschätzen. Extremwertstatistikgestützte Musteranalyse zeigte das Auftreten von präferentiellem Fluss auf dem Standort in Südostdeutschland. Um die Fließmechanismen und mögliche Auswirkungen des präferentiellen Flusses auf die Bodenchemie aufzudecken, wurden Textur, Feinwurzeldichte, Trockenraumdichte, austauschbare Kationen, pH, Gehalt an totalem C und N in präferentiellen Fließwegen und Bodenmatrix analysiert. Ergebnisse aus gemischten Modellen zeigen, dass auf diesem Standort präferentielle Fließwege durch Wurzeln gebildet werden, und zwar hauptsächlich im Oberboden. Im Unterboden nimmt die Durchwurzelung ab, und heterogene Infiltration aus den präferentiellen Fließpfaden in die Bodenmatrix führt zu ungleichmäßigem Matrixfluss. Es wurden keine signifikanten Unterschiede in der Textur gefunden. Allerdings ist die Trockenraumdichte in den präferentiellen Fließwegen geringer als in der Bodenmatrix, wahrscheinlich bedingt durch den erhöhten Gehalt an organischer Materie. Weiterhin wurden in den präferentiellen Fließwegen niedrigere pH-Werte, höherer Gehalt an Ca, Mg, C und N gemessen. Im Vergleich zur umgebenden Bodenmatrix wurde im weniger durchwurzelten und von heterogenem Matrixfluss dominierten Unterboden höherer Gehalt an Al und Fe (allerdings kleine absolute Mengen) festgestellt. Diese klar unterschiedlichen chemischen Eigenschaften lassen sich durch Wurzelaktivitäten und den Transport von gelösten Substanzen (darunter auch DOC: gelöster organischer Kohlenstoff) durch präferentielle Fließwege erklären. Während des Transports ist die Kontaktzeit zwischen dem DOC und dem Boden verkürzt, so dass der Kohlenstoff in tiefere Bodenhorizonte transportiert wird, in denen er eventuell organo-mineralische Komplexe bilden kann. Dies würde bedeuten, dass präferentieller Fluss unter Umständen die Kohlenstoff-Sequestration im Unterboden begünstigen könnte, und nicht nur seine unmittelbare Umgebung, sondern auch die tiefer liegenden Bodenhorizonte beeinflusst. Ein wichtiges Ergebnis dieser Untersuchungen ist die große Anzahl an Bildern der Fließmuster in verschiedenen Böden. In nachfolgenden Arbeiten könnte mit den neuesten Methoden der Reduktion der Dimension untersucht werden, ob diesen Bildern eine niedrigdimensionale Struktur zugrunde liegt

Neste trabalho, sondas solvatocrômicas foram empregadas no estudo de solventes puros, misturas aquosas de solventes próticos e apróticos, líquidos iônicos e suas misturas aquosas. As sondas estudadas foram agrupadas em duas séries, cujas mudanças relevantes foram: (i) série RPMBr2: R de metila a 1-octila permitiu a variação da hidrofobicidade da sonda enquanto o pKa se manteve constante; (ii) série de merocianinas derivadas de piridina, quinolina e acridina. Isso resultou em sondas de hidrofobicidades diferentes com valores parecidos de pKa. Desta forma foi possível isolar os efeitos sobre solvatação provocados pela hidrofobicidade das sondas. As duas séries de sondas mostraram comportamentos solvatocrômicos diferentes. Uma equação modificada de Taft-Kamlet-Abboud permitiu as quantificações individuais de cada propriedade do solvente, tais como acidez, dipolaridade/polarizabilidade e hidrofobicidade para a resposta de cada sonda. O modelo de solvatação preferencial que considera explicitamente a presença de três espécies na mistura binária de solvente foi aplicado, este considera que a água, o solvente orgânico e a espécie solvente orgânico-água competem pela camada de solvatação da sonda. Os resultados deste tratamento ajudaram no entendimento das forças atuantes na solvatação, especialmente com relação aos efeitos das propriedades de ambos a sonda e o solvente, e do aumento da temperatura. Estudos preliminares de misturas aquosas de líquidos iônicos mostraram as semelhanças e as diferenças entre a solvatação por estas misturas \"verdes\" e a por misturas aquosas de álcoois. Uma aplicação do solvatocromismo para o entendimento de un fenômeno físco-químico foi apresentada: os resultados da aplicação do modelo de solvatação preferencial de sondas em misturas aquosas de tetrametiluréia foram usados para explicar o fenômeno de gelificação de proteína neste mesmo sistema de solventes. / In the present work, solvatochromic probes were employed in the study of pure solvents, binary mixtures of water with protic and aprotic solvents, ionic liquids and their aqueous binary mixtures The probes studied are classified in two series: (i) RPMBr2; where R = methyl to 1-octyl allowed increasing the hydrophobicity while maintaining the pKa constant. (ii) The second series involved derivatives of pyridine, quinoline and acridine, this allowed increasing probe hydrophobicity, while maintaining similar pKa. The two series of probes showed different solvatochromic behaviors both in pure solvents and binary solvent mixtures. A modified equation of Taft-Kamlet-Abboud allowed quantification of each solvent property, including acidity, dipolarity/polarizability and hydrophobicity to the response of each probe. The preferential solvation model which explicitly considers the presence of three species was employed; it considers the competition of water, organic solvent and the complex water-organic solvent in the probe solvation shell. The results shed light on the interactions that affect solvation, including temperature-induced desolvation. Preliminary results on aqueous ionic liquids showed the similarities and difference between solvation by these \"green\" mixtures and those of aqueous alcohols. An application of solvatochromism for understanding a physical-chemical phenomenon was presented: the results of application of preferential solvation model of probes in aqueous tetramethylurea mixtures was used to explain the gelation of the protein lysozyme in this same solvent system.

Submitted by Silvana Teresinha Dornelles Studzinski (sstudzinski) on 2017-04-17T19:16:40Z No. of bitstreams: 1 Alícia Cechin_.pdf: 515927 bytes, checksum: 0cbde681385e2cdfaa91d02496e274b7 (MD5) / Made available in DSpace on 2017-04-17T19:16:40Z (GMT). No. of bitstreams: 1 Alícia Cechin_.pdf: 515927 bytes, checksum: 0cbde681385e2cdfaa91d02496e274b7 (MD5) Previous issue date: 2017-02-16 / CNPQ – Conselho Nacional de Desenvolvimento Científico e Tecnológico / O aumento dos Acordos Preferenciais de Comércio (APCs) tem modificado o cenário do comércio internacional. No caso brasileiro, o país se mostra relativamente isolado no cenário das negociações comerciais preferenciais, não possuindo um conjunto de acordos comerciais importantes com parceiros extra-regionais. Nesse sentido, o estudo busca examinar através de um modelo de equilíbrio geral computável (GTAP), os efeitos que a criação de APCs com importantes parceiros comerciais do Brasil teria sobre variáveis-chave para a economia, especialmente bem-estar e comércio internacional. Além das reduções das tarifas de importação, o trabalho também explorou os efeitos da redução das barreiras não-tarifárias (BNTs). Os impactos da formação de acordos de livre comércio geralmente se concentram naqueles setores mais protegidos antes da criação do bloco. Nas simulações realizadas neste trabalho, isso também se observou. Os resultados mostraram um aumento expressivo nas exportações de produtos primários e de baixa intensidade tecnológica, quando simulada a redução parcial e plena das tarifas de importação, no entanto quando simula-se além da redução das tarifas de importação a redução das BNTs, verifica-se que o sistema produtivo brasileiro pode ser afetado de diferente forma. Com a redução plena de tarifas e BNTs, as exportações brasileiras de setores de maior conteúdo tecnológico seriam as mais beneficiadas, enquanto a liberalização parcial das BNTs, além de reduzir a magnitude das exportações em todos os acordos, iria estimular mais setores de menor conteúdo tecnológico em vários acordos. No que se refere ao ganho de bem-estar, verifica-se o mesmo comportamento das exportações, mas quando ocorre a redução das BNTs, o maior ganho de bem-estar é obtido em setores de maior intensidade tecnológica. / The increase in the PTAs (Preferential Trade Agreements) has modified the international trade scenario, in the case of Brazil, the country appears to be relatively isolated in the context of trade negotiations, lacking a set of important trade agreements with extra-regional partners. In this sense, the study seeks to examine, through a computable general equilibrium model (GTAP), the effects that the creation of PTAs with important trade partners of Brazil would have on key variables for the economy, especially welfare and trade International. In addition to the reduction of import tariffs, the work also explored the effects of reducing non-tariff barriers (NTBs). The impacts of forming free trade agreements generally focus on those sectors most protected before the bloc was created. In the simulations performed in this work, this was also observed. The results show a significant increase in exports of primary products and low technological intensity, when simulated the partial and full reduction of import tariffs, however, when the reduction of NTBs is allowed in addition to the reduction of import tariffs, it is verified that the Brazilian productive sector can be affected differently. With the full reduction of tariffs and NTBs, Brazilian exports of sectors with higher technological content would be the most benefited, while the partial liberalization of NTBs, besides reducing the magnitude of exports in all agreements, would stimulate more sectors of lower technological content in most agreements. With regard to welfare gains, the same behavior of exports is observed, when reduction of NTBs occur, the greatest welfare gain is obtained in sectors of higher technological intensity.

新企業所得稅法實施後，內外資企業所得稅法被統一，不一致的情形被消弭，稅收優惠的政策也從對外資企業的普遍優惠制轉變成以產業為導向。凡此種種改變，皆對中國大陸上市企業之有效稅率產生影響。本文以2003年-2010年中國大陸上市企業的財務資料做實證研究。 本文主要研究的課題有三：一、探討新企業所得稅法實施前後稅前扣除規定對有效稅率的影響；二、新企業所得稅法中規定的反資本弱化條款對企業有效稅率是否有影響？；三、內外資企業所得稅兩稅合一之後，各地區是否仍有顯著的稅境差異？ 第一個課題用兩個變數來捕捉，一個是薪資費用，一個是營運費用。薪資費用在內外資企業所得稅兩稅合一前與有效稅率為負相關。本文推論該情形因為高階管理人員的薪資沒有正常列報，而可能的原因有三：一、租稅規劃原因，二、避免薪酬過高引起社會各界關注，故分配在各個關係企業，三、國家對國有企業的高階管理人薪資有限制。 營運費用在內外資企業所得稅兩稅合一前與有效稅率為正相關，與假說預計情況相同。這部分可用財稅差異的觀點來解釋。而內外資企業所得稅兩稅合一之後，應納稅所得額的計算規則更為公平合理，故營運費用對有效稅率的影響為負相關。第二個課題是討論資本弱化條款的問題。內外資企業所得稅兩稅合一之後，該變數之係數呈現顯著正相關，代表中國大陸在內外資企業所得稅兩稅合一之後，反避稅措施的實施已然有些成效。 第三個課題是稅境差異的問題。本文地區性虛擬變數的設置以西部地區為對照組。內外資企業所得稅兩稅合一之前，較明顯享受稅收優惠政策的地區是西部地區與經濟特區，故東部地區與中部地區的係數顯著為正，而經濟地區呈現不顯著的狀態。內外資企業所得稅兩稅合一之後，地區別的稅收優惠政策只剩下西部地區中的鼓勵類產業才能享受，而實證結果也明確顯示中國大陸政府預期的結果。 / After new enterprise income tax law enacted , income tax law applicable to both domestic and foreign-owned enterprise are unified,the difference between those income tax law are gone. The new law scraps the original emphasis on regional incentives in favor of industry-oriented incentives supplemented by regional ones . All of these changes affect corporate effective tax rates of China Listed companies . This study used the sample of china listed companies spanning from 2003-2010. This study have three main topics : First, to discuss how the pre-tax deduction rules affect corporate effective tax rates before and after implementation of the new law. Second, does the anti-thin capitalization rule in the new law have some effect to corporate effective tax rates? Third, after implementation of the new law,are there still big difference between regions? This study used two variables to examine first topic-salary expense and operating expense. Salary expense had a negative correlation with corporate effective tax rates before implementation of the new law. I consider it came from salary information disclosure of senior executives which could be explained in three ways. First, tax planning purpose. Second, in case of drawing attention from publics, part of salary were paid by affiliated companys. Third,the country imposed caps on senior executive pay in state-owned enterprises. Operating expense had a positive relation with corporate effective tax rates before implementation of the new law which is the same as hypothesis. It could be explained in terms of book-tax differences. After implementation of the new law, rules for computation taxable income are more fair and reasonable. As a result, operating expense has a negative relation with corporate effective tax rates. The second topic discuss about anti-thin capitalization rule.After implementation of the new law, the variable standing for anti-thin capitalization rule is significantly positively correlated with corporate effective tax rates.It represents that, after implementation of the new law, China authorities make progress in anti-tax avoidance. The third topic is about tax burden between regions. This study used western region as a control group. Before implementation of the new law, preferential tax policies were subject to western region and Special Economic Zones. For this reason, the region dummy variables—central China and east China were significantly positively correlated with corporate effective tax rates, but the coefficient of western region dummy variable did not reach statistical significance. After implemention of the new law, preferential tax policies is subject only to domestic enterprises belonging to the category encouraged by the State in western region. The empirical results conform to the anticipation of China authorities.

<p>Aim: Preferential treatment and allocation of quotes according to sex are two current concepts due to the increasing demand for equality. One organization that may use preferential treatment is the fire department. This is why we chose it as a starting point for our study. The aim with this essay is to investigate how Gästrike Räddningstjänst can create a more equal organization.</p><p>Method: We have interviewed eight employees and prepared questions for each one. This represents a qualitative method. We have studied literature on the subject to get a theoretical background before the interviews. After the study we analysed the interviews with help from the theory. And finally we drew conclusions from this analysis. This resulted in suggestions that could help Gästrike Räddningstjänst create a more equal organization.</p><p>Result & Conclusions: Equality between the sexes is important but at the same time it is important that the employed women have the right qualities. Measures should be taken to draw women to the profession in order to create a wider selection. One measure that could give a wider selection is positive special treatment. It is important to think about the employees while making a change so that negative attitudes do not affect the process to make the profession more equal. Based on theory we can see that it is important to communicate the aim of the change to reduce resistance from the employees. Change has to be allowed to take time since the organizational culture is strong and has existed for a long time. Due to the strong culture it is necessary to focus on measures that will create a strong but adaptable culture. Management should continually evaluate the process of change to discover possible problems and to highlight progress. Employees can also take part in the evaluation.</p><p>Suggestions for future research: It would be interesting to compare different fire departments in Sweden considering their work with equality between sexes. It would also be interesting to observe the process of recruitment more closely.</p><p>Contribution of the thesis: Our hope is that this essay helps to increase awareness in the important issue of equality.</p> / <p>Syfte: Positiv särbehandling och kvotering är två aktuella begrepp i och med ökade krav på jämställdhet. Räddningstjänsten är en organisation som berörs av framförallt positiv särbehandling. Därför valde vi brandmannayrket som utgångspunkt för vår studie. Syftet med denna uppsats är att undersöka hur ledningen inom Gästrike Räddningstjänst kan gå tillväga för att skapa en mer jämställd organisation.</p><p>Metod: Vi har intervjuat åtta personer och förberett anpassade frågor till var och en, vilket representerar en kvalitativ metod. Innan intervjuerna genomförde vi en litteraturstudie för att få en teoretisk grund. Efter vår empiriska studie analyserade vi intervjuerna med stöd av teorin. Därefter drog vi slutsatser utifrån analysen, vilket resulterade i förslag på hur Gästrike Räddningstjänst kan skapa en mer jämställd organisation.</p><p>Resultat & slutsats: Jämställdhet är viktigt men samtidigt måste de kvinnor som anställs vara tillräckligt kompetenta. Åtgärder bör vidtas för att locka fler kvinnor till yrket för att skapa ett bredare urval vid rekrytering. En åtgärd som kan ge ett bredare urval är positiv särbehandling. Vid förändringsarbetet är det viktigt att ta hänsyn till anställda så att inte negativa attityder försvårar processen att göra yrket mer jämställt. Utifrån teorin kan vi se att det är viktigt att tydligt kommunicera syftet med förändringen för att minska ett eventuellt motstånd. Förändringsarbetet måste få ta tid eftersom det är en stark organisationskultur som funnits länge. På grund av den starka organisationskulturen är det nödvändigt att fokusera på faktorer som gör kulturen stark men anpassningsbar. För att upptäcka eventuella problem och för att belysa framsteg bör ledning kontinuerligt följa upp förändringsarbetet. Detta kan med fördel genomföras tillsammans med de anställda.</p><p>Förslag till fortsatt forskning: Det skulle vara intressant att jämföra olika brandstationer i Sverige för att se om det ser likadant ut i hela landet, eller om vissa stationer kommit längre i sitt jämställdhetsarbete. Det skulle även vara intressant att mer närgående observera anställningsprocessen.</p>