Made available in DSpace on 2016-04-25T18:40:39Z (GMT). No. of bitstreams: 1 EdigarBernardoDosSantos.pdf: 1215755 bytes, checksum: 0867829a5c069c9043ccc11ad6c7aaa4 (MD5) Previous issue date: 2005-05-31 / Boosted by the acceleration in the economic globalization, the increase of the business competition, the work to synergy, the scale gains and the exponential growth in development of the technology of information, companies increased their international transactions such as mergers, acquisitions, joint ventures, issuance of debt securities, access to the public market of stocks abroad, etc. These transactions require exchange of accounting information in an international language. As the United States is considered one of the most important financial market in the world, the main objective of this narrative is the comparative analysis of the accounting standards and taxes applicable to the operations of business combinations in the United States and Brazil. Primary, it was presented some statistics about business combinations, followed by a conceptual and literature review. In the chapters called accounting procedures for the operations of business combinations in the United States and Brazil, the main accounting standard issued in each country is analyzed, with special focus on the definitions, accounting records, criteria of evaluation, consolidation needs and disclosure requirements. In the comparative chapter the main similarities and differences between the standards of the two countries are presented, followed by commentaries with opinions and recommendations. In the following chapters, called taxes aspects related to the operations of business combinations in Brazil and the United States, the main legal definitions related to the taxation of the capital gain and the possibilities of taxes deduction of the amortization of goodwill are evaluated. In the comparative chapter of the taxes aspects is presented where the criteria of the two countries are compared. The methodology was based in an exploratory research and in the comparative method. Finally, it was concluded there are not relevant differences between the accounting standards of the business combinations in the two countries, except for the amortization of goodwill and accounting record of negative goodwill. In relation to the taxes aspects, the tax deduction of goodwill is permitted in the two countries, however in different periods and the capital gain in the sale of the permanent investments is subject to taxation in both, but the Brazilian rules allow the tax planning. / Impulsionadas pelo acelerado fenômeno da globalização econômica, crescimento da competitividade, busca de sinergia, ganhos de escala e a exponencial evolução da tecnologia da informação, as empresas passaram a realizar cada vez mais transações internacionais, tais como: fusões, aquisições, joint ventures, emissão de título de dívida, lançamento de ações no exterior etc. Essas operações requerem troca de informações contábeis em linguagem internacional. Considerando-se os Estados Unidos um dos principais mercados financeiros mundiais, esta dissertação teve como objetivo principal a análise comparativa das normas contábeis e tributárias aplicáveis às operações de business combinations, nos Estados Unidos e no Brasil. Inicialmente, apresentam-se algumas estatísticas de operações de business combinations, seguidas de revisão conceitual e da literatura. Nos capítulos denominados procedimentos contábeis para as operações de business combinations nos Estados Unidos e no Brasil, analisam-se as principais normas contábeis vigentes em cada país sobre business combinations, com destaque para as definições, registro, critérios de avaliação, necessidades de consolidação e obrigatoriedade de divulgação. No capítulo comparativo, apresentam-se as principais similaridades e diferenças entre as normas dos dois países, seguidas de comentários, opiniões e recomendações. Nos capítulos seguintes, denominados aspectos tributários relacionados às operações de business combinations nos Estados Unidos e no Brasil, avaliam-se as principais definições legais relacionadas à tributação do ganho de capital e as possibilidades de dedução fiscal da amortização do ágio ou goodwill. No capítulo comparativo dos aspectos tributários, confrontam-se os critérios utilizados em cada um dos países. A metodologia foi fundamentada na pesquisa exploratória e no método comparativo. Finalmente, verifica-se que não há diferenças relevantes entre as normas contábeis para as operações de business combinations nos dois países, exceto quanto aos critérios para amortização do goodwill e registro do goodwill negativo. Em relação às normas tributárias, verifica-se que a dedução fiscal do goodwill é permitida nos dois países, mas em prazos diferentes, e que o ganho de capital na alienação de investimentos está sujeito à tributação em ambos, mas as normas brasileiras permitem o planejamento tributário.

The low complexity of IIR adaptive filters (AFs) is specially appealing to realtime applications but some drawbacks have been preventing their widespread use so far. For gradient based IIR AFs, adverse operational conditions cause convergence problems in system identification scenarios: underdamped and clustered poles, undermodelling or non-white input signals lead to error surfaces where the adaptation nearly stops on large plateaus or get stuck at sub-optimal local minima that can not be identified as such a priori. Furthermore, the non-stationarity in the input regressor brought by the filter recursivity and the approximations made by the update rules of the stochastic gradient algorithms constrain the learning step size to small values, causing slow convergence. In this work, we propose IIR performance enhancement strategies based on hybrid combinations of AFs that achieve higher convergence rates than ordinary IIR AFs while keeping the stability. / A baixa complexidade dos filtros adaptativos (FAs) IIR é atrativa para aplicações em tempo real, mas certos inconvenientes têm impedido sua ampla utilização até agora. Para os FAs baseados no gradiente descendente, condições operacionais adversas suscitam problemas de convergência em cenários de identificação de sistemas: pólos subamortecidos ou agrupados, submodelagem ou sinais correlacionados originam superfícies de erro onde a adaptação desacelera em grandes planícies ou para em mínimos locais sub-ótimos que não podem ser identificados como tais a priori. Além disso, a não-estacionaridade do regressor de entrada causada pela recursividade do filtro e as aproximações feitas pelas regras de atualização dos algoritmos de gradiente estocástico restringem o passo de aprendizado a valores pequenos, retardando a convergência. Neste trabalho, propomos estratégias de aprimoramento de desempenho baseadas em combinações híbridas e estáveis de FAs que alcançam taxas de convergências mais altas do que FAs IIR comuns.

The low complexity of IIR adaptive filters (AFs) is specially appealing to realtime applications but some drawbacks have been preventing their widespread use so far. For gradient based IIR AFs, adverse operational conditions cause convergence problems in system identification scenarios: underdamped and clustered poles, undermodelling or non-white input signals lead to error surfaces where the adaptation nearly stops on large plateaus or get stuck at sub-optimal local minima that can not be identified as such a priori. Furthermore, the non-stationarity in the input regressor brought by the filter recursivity and the approximations made by the update rules of the stochastic gradient algorithms constrain the learning step size to small values, causing slow convergence. In this work, we propose IIR performance enhancement strategies based on hybrid combinations of AFs that achieve higher convergence rates than ordinary IIR AFs while keeping the stability. / A baixa complexidade dos filtros adaptativos (FAs) IIR é atrativa para aplicações em tempo real, mas certos inconvenientes têm impedido sua ampla utilização até agora. Para os FAs baseados no gradiente descendente, condições operacionais adversas suscitam problemas de convergência em cenários de identificação de sistemas: pólos subamortecidos ou agrupados, submodelagem ou sinais correlacionados originam superfícies de erro onde a adaptação desacelera em grandes planícies ou para em mínimos locais sub-ótimos que não podem ser identificados como tais a priori. Além disso, a não-estacionaridade do regressor de entrada causada pela recursividade do filtro e as aproximações feitas pelas regras de atualização dos algoritmos de gradiente estocástico restringem o passo de aprendizado a valores pequenos, retardando a convergência. Neste trabalho, propomos estratégias de aprimoramento de desempenho baseadas em combinações híbridas e estáveis de FAs que alcançam taxas de convergências mais altas do que FAs IIR comuns.

Past focus in the panel gravity literature has been on multidimensional fixed effects specifications in an effort to accommodate heterogeneity. After introducing conventional multidimensional fixed effects, we find evidence of cross-sectional dependence in flows. We propose a simultaneous dependence gravity model that allows for network dependence in flows, along with computationally efficient Markov Chain Monte Carlo estimation methods that produce a Monte Carlo integration estimate of log-marginal likelihood useful for model comparison. Application of the model to a panel of trade flows points to network spillover effects, suggesting the presence of network dependence and biased estimates from conventional trade flow specifications. The most important sources of network dependence were found to be membership in trade organizations, historical colonial ties, common currency and spatial proximity of countries. / Series: Working Papers in Regional Science

With continuously increasing urbanization, consumer demands and expansion of water supply systems, determination of efficient pump schedules became a more difficult task. Pumping energy costs constitute a significant part of the operational cost of the water distribution networks. This study aims to provide an effective daily pump schedule by minimizing the energy costs for constant and also for multi tariff of electricity (3 Kademeli Elektrik Tarifesi) in water distribution network. A case study has been performed in an area covering N8.3 and N7 pressure zones which are parts of Ankara water distribution network. Both pressure zones consists of 3 multiple pumps in pump station and one tank having 5000 m3 storage volume each. By using genetic algorithm based software (WaterCAD Darwin Scheduler) least-cost pump scheduling and operation policy for each pump station has been determined while satisfying target hydraulic performance requirements such as minimum and maximum service pressures, final water level of storage tank and maximum velocity in pipeline. 32 different alternative scenarios have been created which include multi tariff energy prices, constant tariff energy price, insulated system condition, uninsulated system condition and different pump combinations. The existing base scenario and alternative scenarios which were prepared by using optimal pump schedules have been compared and the achievements of optimizing pump operation have been analyzed. At the end of the study, a satisfying result has been observed that by using determined optimal pump schedule, minimum % 14 of total energy cost can be saved in existing water supply system.

In this paper, we will review two fundamental counting methods: inclusionexclusion and pigeonhole principles. The inclusion-exclusion principle considers the elements of the sets satisfied some conditions, and avoids repeat counting by disjoint sets. We also use the inclusion-exclusion principle to solve the problems of Euler phi function and the number of onto functions in number theory, and derangement and the number of nonnegative integer solutions of equations in combinatorics. We derive the closed-form formula to those problems. For the forbidden positions problems, we use the rook polynomials to simplify the counting process. We also show the form of the inclusion-exclusion principle in probability, and use it to solve some probability problems. The pigeonhole principle is an easy concept. We can establish some sets and use the pigeonhole principle to discuss the extreme value about the number of elements. Choose the pigeons and pigeonholes, properly, and solve problems by the concept of the pigeonhole principle. We also introduce the Ramsey theorem which is an important application of the pigeonhole principle. This theorem provides a method to solve problems by complete graph. Finally, we give some contest problems about the inclusion-exclusion and pigeonhole principles to show how those principles are used.

The article provides the analysis of market development of commercial property constructions, trends, regularities, optimal site locations, characteristics of constructive choosing of combinations, of the main financial investment indices after change of political, economical and social relationships in the East Europe. The overview of the main modern investment requirements important for construction of commercial objects in order to get the maximum profit for exploitation thereof is provided. The models of choosing such indices as market research, site location, constructive combinations, financing of commercial objects are provided. It is emphasized that multiple criteria decision methods are most suitable and particularly ELECTRE III for research and valuation of investment project alternatives of commercial objects is singled out.

The article provides the analysis of market development of commercial property constructions, trends, regularities, optimal site locations, characteristics of constructive choosing of combinations, of the main financial investment indices after change of political, economical and social relationships in the East Europe. The overview of the main modern investment requirements important for construction of commercial objects in order to get the maximum profit for exploitation thereof is provided. The models of choosing such indices as market research, site location, constructive combinations, financing of commercial objects are provided. It is emphasized that multiple criteria decision methods are most suitable and particularly ELECTRE III for research and valuation of investment project alternatives of commercial objects is singled out.

Baigiamajame darbe atliktas tiltin÷s santvaros, iš metalinių profiliuočių, konstrukcijos formos ir strypų skerspjūvių optimizavimas, esant vienam ir dviems apkrovų variantams. Konstrukcija projektuota atsižvelgiant į STR reikalavimus. Tam buvo spręstas netiesinio programavimo uždavinys. Sudarytos nagrinėjamo modelio pagrindinės priklausomybės taikant pusiausviruosius baigtinius elementus. Jų pagrindu sudaryta konstrukcijos optimizavimo programa MATLAB aplinkoje. Naudojantis ją, nustatyta optimali konstrukcijos struktūra ir optimalūs strypų skerspjūviai, esant minimaliam konstrukcijos tūriui, taikant ir netaikant santvaros aukščio ribojimą. Suformuluotos išvados. Darbą sudaro 6 dalys: įvadas, santvaros skaičiuojamoji schema ir apkrovų deriniai, santvaros įtempių ir deformacijų būvio analizė taikant pusiausviruosius baigtinius elementus, konstrukcijos masės minimizavimo uždavinys,optimizavimo rezultatai, išvados, literatūros sąrašas. Darbo apimtis – 67 p. teksto be priedų, 19 iliustr., 11 lent., 26 bibliografiniai šaltiniai. Atskirai pridedami darbo priedai. / In the work bridge truss made of steel cross sections was optimized. There was both form of truss and cross sections optimized according to one, and two loads combinations. Construction was design by STR (Lithuanian national design codes). For the mathematical nonlinear programing problem was solved. The main equations inequality of structure analyze discrete model was made using finite elements method. Basing on them program for optimization in Matlab language was made. By that program, optimal truss form and cross sections was found by minimizing structure volume. Six projects were found including and not including limitation of truss high. Structure: introduction, truss analytical scheme and load combinations, truss analysis using finite element method, construction mass minimization, optimal structure results, conclusions and suggestions, references. Thesis consist of: 67 p. text without appendixes, 19 pictures, 11 tables, 26 bibliographical entries. Appendixes included.

The combination of two or more portfolio rules is theoretically convex in return-risk space, which provides for a new class of portfolio rules that gives purpose to the Mean-Variance framework out-of-sample. The author investigates the performance loss from estimation risk between the unconstrained Mean-Variance portfolio and the out-of-sample Global Minimum Variance portfolio. A new two-fund rule is developed in a specific class of combined rules, between the equally weighted portfolio and a mean-variance portfolio with the covariance matrix being estimated by linear shrinkage. The study shows that this rule performs well out-of-sample when covariance estimation error and bias are balanced. The rule is performing at least as good as its peer group in this class of combined rules.