3122043 documents found, page 8330 of 312205
Estudo da maximização da frequência de treliças com massa não estrutural
Rocha, Creyton BorgesThis work study the problem of maximizing the fundamental frequency of trusses and the effect of including a non structural mass. The problem of maximizing the natural frequencies of structures is important for mechanical engineering applications, however, the optimization model has difficult technical issues when some structural element is removed (topology optimization). Fortunately, there exists theoretical ...
Metaestabilidade na cruz
Quintans, Jairo Carlos de OliveiraStatistical Mechanics appeared in the middle of 1850, is based on the attempt of the use of microscopic models, with the intention of describing macroscopic phenomena. In general, such models have stochastic dynamics. That is, the micro-system particles evolve stochastically. In this work we are interested in certain systems which are called Markov Chains at continuous time, where the particles are located at p...
Aplicação de eliminação iterada de estratégias dominadas a modelos de competiçã...
Oliveira, João Paulo Caraú deIn this dissertation we present the study and application of a tool derived from the Theory of Games called the iterated elimination of strictly dominated strategies or actions (IESD). Using the Python programming language, this work focuses on the construction and application of an algorithm based on this tool to solve a hypothetical situation of conflict between two spaceships. The analysis takes place from t...
Mediação popular: o direito fundamental do acesso à justiça como prática emanci...
Almeida, Ana Lia Vanderlei deMediation is an Alternative Dispute Resolution (ADR) that is becoming increazingly important Brazil, in which a neutral third party facilitates the parties' own settlement process. The present research reflects about this mechanism's political potential, based on a community mediation experience (internship at Juspopuli human right organization — Salvador-BA). There are four fundamental points in our research. ...
Técnicas para estimação de expoentes de Lyapunov em sistemas dinâmicos nâo-line...
Galdino, Vanlex GomesThestability of trajectories in the phase space of a dynamical system can be characterized through Lyapunov characteristic exponents. In simple situations, these exponents correspond to the eigenvalues of the linearized equation of motion. However, for complex trajectories occurring in many nonlinear systems, specially during the occurrence of chaos, the determination and the very concept of stability and of th...
Mercado e educação: a política do Instituto Ayrton Senna no município de Cabede...
Dias, Priscila dos Santos FerreiraIn the beginning of the XXIst century, Brazilian educational policy has been consolidated in the mercantilist scenario influenced by the global economy and this was not a characteristic phenomenon only in the private ambit. Approaching the theory of quasi-market it was evidenced a model of educational management focused in performance, developed in the public sphere. In this study, neoliberal ideas emerge with ...
Caracterização estrutural e eletroquímica de cobaltita de cálcio como cátodo de...
Santos, Jakeline Raiane Dora dosIn the last decades, mainly due to the advent of new technologies, with the exponential growth of the population, the intensification of the use of fossil fuels has generated great impacts to the environment. In this scenario, the search for energy alternatives has been constant. A rising solution is the use of the fuel cell technology, which has the principle of converting chemical energy into electrical energ...
Efeito da relação oxigênio/combustível na microstrutura e propriedades de reves...
Feitosa, Francisco Riccelly PereiraDiscovered by Dan Shectman in 1982. Quasicrystals, ordered and aperiodic structures, are intermetallic compounds that have very different thermal and surface properties than conventional crystal structures. They are hard and brittle at room temperature, however because they have low thermal conductivity and low coefficient of friction, research suggests the application of these materials as hard coatings (high ...
Catalisadores bimetálicos para reforma a seco de metano e anodos de células a c...
Souza, Glageane da SilvaIn the search for renewable and environmentally friendly energy sources, hydrogen production and solid oxide fuel cell (SOFC) research have been prominent. Nickel and gadolinia doped ceria (Ce1-xGdxO2-? - CGO) based anodes have presented good electrochemical performance at intermediate temperatures (600-800 °C), allowing the direct oxidation of gases with hydrocarbons. Precursors of nickel, copper and cobalt bi...
Membranas de quitosana/bioativos naturais com atividade antimicrobiana para tra...
Santos, Elaine Pereira dosNatural antimicrobials are effective and economical alternatives as they are obtained from aromatic plants and rich spices as essential oils characterized by a remarkable antimicrobial activity, and for this reason their products can be used to retard or inhibit the microbial multiplication so found in skin infections. In order to provide quick-relief treatments for wound infection, natural bioactives such as c...