Murais modernos de Newton Navarro e Dorian Gray

This research aims to study wall paitings created by artists Newton Navarro and Dorian Gray, installed in public buildings of modern architecture, in Natal/RN from 1950 to 1970. The subject is seen by focusing on its concepts and characterization, linked to the ideia of integration of the arts and the meaning of modern mural painting in Brasil. The study presents an analyses of those paitings considering themes, techiniques and dimensions, comparing the solutions of local artists with brasilian muralist painters, particularly the work of Cândido Portinari. Registers of artistic works show a view of the inclusion of arts in modern architecture in the city

Os dias são maus : o ensino religioso cristão em dias pós-modernos o desafio de fazer crer perante a cultura da incredulidade

This paper adopts the assumption that religion continues to be a major highlight in the dimension of the contemporary world - characterized by pluralism, the ideas of tolerance and freedom. But for certain streams of Christianity, the postmodern culture seems to be characterized as a highly damaging to their doctrines and principles, since this religious matrix carries a truth claim that would support all its significance, its definition values and their dissemination effort ( evangelism ). This is not to say that Christianity is the only religion that claims to the truth, which would be a gross mistake. Now, religion has been reputed as a phenomenon doomed to disappear, according to the " ideology " of Modernity, given the idea that scientific development would lead us inevitably to the statement that religion was merely a social institution based in the superstition, in fantasy, the imaginary and therefore had nothing "real " unless its existence as an institution capable of aggregating society (give it cohesion), provide values and meaning to different ontological anxieties and doubts of humankind. In the contemporary scenario - seeded by modernity - as Christian ideas, doctrines and principles are in harmony or conflict with postmodernity? These are our starting questions and issues that we intend to stop and reflect. From the assumption that the religious phenomenon has great force in the present day, this research aims to perform central analysis of how religious education, a Protestant denomination specific, harmonizes or clashes with the ideology or ideas more general and emphatic that we can observe in the western world is presented to us from the diagnoses made by the contemporary authors who debate about postmodernism and postmodernity, notably David Harvey, Jean - François Lyotard, Bauman Zygmunt and Fredric Jameson

Murais modernos de Newton Navarro e Dorian Gray

This research aims to study wall paitings created by artists Newton Navarro and Dorian Gray, installed in public buildings of modern architecture, in Natal/RN from 1950 to 1970. The subject is seen by focusing on its concepts and characterization, linked to the ideia of integration of the arts and the meaning of modern mural painting in Brasil. The study presents an analyses of those paitings considering themes, techiniques and dimensions, comparing the solutions of local artists with brasilian muralist painters, particularly the work of Cândido Portinari. Registers of artistic works show a view of the inclusion of arts in modern architecture in the city

Diagnóstico, estadiamento e tratamento cirúrgico do adenocarcinoma de pâncreas

O adenocarcinoma pancreático é um dos tumores sólidos de pior prognóstico, sendo o tratamento cirúrgico o único potencialmente curativo. Na grande maioria dos pacientes o tumor é diagnosticado em fase avançada, comumente na presença de doença metastática. A introdução de modernos métodos diagnósticos associados ao aperfeiçoamento dos já existentes tem gerado controvérsia quanto à melhor maneira de se estabelecer o diagnóstico e estadiamento do tumor. Da mesma forma, o papel da cirurgia na paliação e aspectos técnicos da ressecção de lesões localizadas estão longe de alcançarem consenso na prática. Método - Revisão da literatura sobre os aspectos controversos relacionados ao tema e um algoritmo para a abordagem dos pacientes com suspeita de tumor de pâncreas são apresentados. Foram utilizados os descritores: “adenocarcinoma” e “pâncreas” para pesquisa no PubMed (www.pubmed.com) e na Bireme (www.bireme.br) e a seguir selecionadas as publicações pertinentes a cada tópico escolhido com atenção especial para metanálises, estudos clínicos controlados, revisões sitemáticas e ainda publicações de grandes centros especializados em doenças pancreáticas. Conclusões - Na suspeita de adenocarcinoma de pâncreas é possível realizar estadiamento muito próximo do real sem a necessidade da exploração cirúrgica sistemática em virtude da disponibilidade na prática de exames modernos e eficientes. Isso permite que paliação menos invasiva seja praticada na maioria dos pacientes com lesões avançadas e incuráveis. Nos em que a cura é possível, a operação deve ser realizada objetivando-se, essencialmente, a remoção da lesão com margens livres e com aceitáveis índices de morbi-mortalidade

Comunicação interna em empreendimento hoteleiro: um enfoque gerencial

Globalization, which increased the market to a position of competition and change never before experienced, also imposed a series of changes that have transformed the social systems, organizations increasingly complex. In this scenario, communication has received attention from modern managers. Research indicates that some sectors of activity, more than others, rely on communication as a tool for achieving their goals. The tourism sector, located in the service segment is configured as one of these activities, which the hotel is part of the composite product. With the intention to acknowledge these aspects in this study sought to analyze the characteristics of internal communication in a hotel project in the managerial perspective. To try to answer this purpose we constructed a framework based on authors that discuss organizational communication, internal communication and hotel businesses. For the purpose of research was chosen a unit of study to assess the views of managers regarding the issue. In the unit studied was sought to apprehend these meanings through interviews with a group of managers in the organization and analysis of documents. Data were analyzed through content analysis of Bardin (1977), with the technique of categorical analysis, as it sought to capture aspects that allow the description of the contents of the messages. The results pointed to an organizational reality based heavily on orality, who lives constantly with noise and using communication to regulate behavior. With little or no reflection on managerial communication inferred that subordinates should not absorb the message completely, a phenomenon that can not be responsible for the complete fulfillment thereof. Moreover, it was realized that the organization studied did not plan your communication, since, yet the views as a strategic tool to achieve your goals

Interação de microorganismos na solubilização de fósforo e potássio de rochas para produção de biofertilizantes

he present model of agriculture is based on intensive use of industrial inputs, due to its rapid response, but it brings harmful consequences to the environment, and it is necessary the use of modern inputs. And an alternative is the use of rock biofertilizers in agriculture, a product easy to use, with higher residual effect and does not harm the environment. The objective of study was to evaluate the inoculation and co-inoculation of different microorganisms in the solubilization of rock phosphate and potash ground microbial evaluating the best performance in the production of biofertilizers comparing with rocks pure in soil chemical properties and, verify effect of inoculation of the bacterium Paenibacillus polymyxa in the absorption of minerals dissolved in the development of cowpea (Vigna unguiculata [L.] Walp.). The first bioassay was conducted in Laboratory (UFRN) for 72 days in Petri dishes, where the rock powder was increased by 10% and sulfur co-inoculated and inoculated with bacterial suspension of Paenibacillus polymyxa grown in medium tryptone soy broth, Ralstonia solanacearum in medium Kelman, Cromobacterium violaceum in medium Luria-Bertani and Acidithiobacillus thiooxidans in medium Tuovinen and Kelly,and fungi Trichoderma humatum and Penicillium fellutanum in malt extract. Every 12 days, samples were removed in order to build up the release curve of minerals. The second bioassay was conducted in a greenhouse of the Agricultural Research Corporation of Rio Grande do Norte in experimental delineation in randomized block designs, was used 10 kg of an Yellow Argissolo Dystrophic per pot with the addition of treatments super phosphate simple (SS), potassium chloride (KCl), pure rock, biofertilizers in doses 40, 70, 100 and 200% of the recommendation for SS and KCl, and a control, or not inoculated with bacteria P. polymyxa. Were used seeds of cowpea BRS Potiguar and co-inoculated with the bacterial suspension of Bradyrhizobium japonicum and P. polymyxa. The first crop was harvested 45 days after planting, were evaluated in the dry matter (ADM), macronutrients (N, P, K, Ca, Mg) and micronutrients (Zn, Fe, Mn) in ADM. And the second at 75 days assessing levels of macro end micronutrients in plants and soil, and the maximum adsorption capacity of P in soil. The results showed synergism in co-inoculations with P. polymyxa+R. solanacearum and, P. polymyxa+C. violaceum solubilizations providing higher P and K, respectively, and better solubilization time at 36 days. The pH was lower in biofertilizers higher doses, but there was better with their addition to P at the highest dose. Significant reduction of maximum adsorption capacity of phosphorus with increasing dose of biofertilizer. For K and Ca was better with SS+KCl, and Mg to pure rock. There was an effect of fertilization on the absorption, with better results for P, K and ADM with SS+KCL, and N, Ca and Mg for biofertilizers. Generally, the P. polymyxa not influence the absorption of the elements in the plant. In treatments with the uninoculated P. polymyxa chemical fertilizer had an average significantly higher for weight and number of grains. And in the presence of the bacteria, biofertilizers and chemical fertilizers had positive values in relation to rock and control. The data show that the rocks and biofertilizers could meet the need of nutrients the plants revealed as potential for sustainable agriculture

Análise das emissões gasosas de um veículo flex funcionando com diferentes combustíveis

Efforts in research and development of new technologies to reduce emission levels of pollutant gases in the atmosphere has intensified in the last decades. In this context, it can be highlighted the modern systems of electronic engine management, new automotive catalysts and the use of renewable fuels which contributes to reduce the environmental impact. The purpose of this study was a comparative analysis of gas emissions from a automotive vehicle, operating with different fuels: natural gas, AEHC or gasoline. To execute the experimental tests, a flex vehicle was installed on a chassis dynamometer equipped with a gas analyzer and other complementary accessories according to the standard guidelines of emission and security procedures. Tests were performed according to NBR 6601 and NBR 7024, which define the urban and road driving cycle, respectively. Besides the analysis of exhaust gases in the discharge tube, before and after the catalyst, using the suction probe of the gas analyzer to simulate the vehicle in urban and road traffic, were performed tests of fuel characterization. Final results were conclusive in indicating leaded gasoline as the fuel which most contributed with pollutant emissions in atmosphere and the usual gasoline being the fuel which less contributed with pollutant emissions in atmosphere

Simulação de fluxo de fluidos em meios porosos desordenados uma análise de efeito de escala na estimativa da permeabilidade e do coeficiente de arrasto

The present study provides a methodology that gives a predictive character the computer simulations based on detailed models of the geometry of a porous medium. We using the software FLUENT to investigate the flow of a viscous Newtonian fluid through a random fractal medium which simplifies a two-dimensional disordered porous medium representing a petroleum reservoir. This fractal model is formed by obstacles of various sizes, whose size distribution function follows a power law where exponent is defined as the fractal dimension of fractionation Dff of the model characterizing the process of fragmentation these obstacles. They are randomly disposed in a rectangular channel. The modeling process incorporates modern concepts, scaling laws, to analyze the influence of heterogeneity found in the fields of the porosity and of the permeability in such a way as to characterize the medium in terms of their fractal properties. This procedure allows numerically analyze the measurements of permeability k and the drag coefficient Cd proposed relationships, like power law, for these properties on various modeling schemes. The purpose of this research is to study the variability provided by these heterogeneities where the velocity field and other details of viscous fluid dynamics are obtained by solving numerically the continuity and Navier-Stokes equations at pore level and observe how the fractal dimension of fractionation of the model can affect their hydrodynamic properties. This study were considered two classes of models, models with constant porosity, MPC, and models with varying porosity, MPV. The results have allowed us to find numerical relationship between the permeability, drag coefficient and the fractal dimension of fractionation of the medium. Based on these numerical results we have proposed scaling relations and algebraic expressions involving the relevant parameters of the phenomenon. In this study analytical equations were determined for Dff depending on the geometrical parameters of the models. We also found a relation between the permeability and the drag coefficient which is inversely proportional to one another. As for the difference in behavior it is most striking in the classes of models MPV. That is, the fact that the porosity vary in these models is an additional factor that plays a significant role in flow analysis. Finally, the results proved satisfactory and consistent, which demonstrates the effectiveness of the referred methodology for all applications analyzed in this study.

Feiras livres : cidades de um só dia, aprendizados para a vida inteira

La tesis problematiza constelaciones creativas de saberes marcados por múltiples subjetividades en un espacio singular de las ciudades: la feria libre. Lugar de cambios financieros, pero también afectivos, simbólicos y míticos, ese espacio se mantiene al lado de los lugares comerciales asépticos y climatizados como son los supermercados e hipermercados de los espacios urbanos y de las metrópolis. Las ferias, por su carácter itinerante y sus personajes nómades modernos, son capaces de suscitar múltiples observaciones, divagaciones, afecciones y construcción de conocimientos. En la feria libre del barrio de Alecrim en la ciudad de Natal-RN/Brasil, principal contexto de referencia de esta investigación, en medio de tantos estímulos movilizadores de los órganos de los sentidos, salta a los ojos el elevado contingente de niños y adolescentes ejerciendo las múltiples actividades laborales. En Brasil el trabajo infantil es encajado en prohibiciones prescritas por leyes que recubren singularidades. Sin la pretensión de negar la importancia de tales convenciones y reglas, las reflexiones aquí puestas ultrapasan las amarras homogeneizantes del discurso oficial instituido de prohibición, problematizando a partir de la feria la idea de una caótica y pulsante aula al aire libre en la cual se construyen saberes más próximos de una lógica del sensible (Claude Lévi-Strauss). La feria es un laboratorio de construcción de conocimientos pertinentes (Edgar Morin), aquellos que religan fenómeno y contexto sin oponer manipulación y tiempo real de aplicabilidad de los saberes construidos. En esa escuela sin paredes, puertas, ventanas, cuadros negros o programas, los saberes de la tradición (Conceição Almeida) son probados y compartidos por niños y adolescentes que viven constantemente con un tipo de cambio de bienes y palabras en permanente construcción. En los puestos de la feria y para más allá de ellos encontramos sujetos híbridos (Bruno Latour) que se estructuran por medio de mecanismos creativos capaces de hacerlos navegar en las incertidumbres caóticas de sus vidas. Los aprendizajes de la feria fueron o son la pulsión de reinvención de esos sujetos aparentemente encarcelados en el conformismo como fatalidad última, portadores de historias embarazadas de simbologías tristes y felices que exponen la cara de un humano en permanente combustión, construcción e incertidumbre

Trabalho, pobreza e caridade: as ações do Padre Ibiapina nos sertões do Nordeste

This work started from an investigation concerning the process of education, moralization and disciplining of the poor in the backlands of the Brazilian Northeast region, in the second half of the 19th century, through the incorporation of the values of productive work. In order to do so, we took as our field of investigation the missions of Father José Antônio Pereira Ibiapina (1806-1883), in which an extensive work was developed, including the construction of twenty two (22) charity houses in the States of Rio Grande do Norte, Paraíba, Pernambuco, Ceará e Piauí, but also of weirs, churches, graveyards, hospitals and so forth. Given the socio-historical character of the research, we adopted qualitative methods of analysis and the following procedures: survey and analysis of documents, statute and internal rules that ordered the workings of the charity houses; biographies on Father Ibiapina and the missions‟ reports, as well as various sorts of publications on the missionary. Our study comprises his 27 year-period of missionary-religious activity (1856-1883), and undertakes an analysis on the topic of poverty, since the medieval Christian take on it until modernity, when it stops representing a value and becomes a problem to be solved through work. The socio-political context in which Ibiapina lived in the Northeast was marked by the consequence of droughts and economic crises in the region. The analysis of the documents indicates that, in the circumstances of political weakness and lack of interest for regional demands by the national political agenda, his missionary actions produced strong effects. Starting from an ethics of valorization of work, which combined modern and traditional elements, his actions set up disciplinary, moralizing and civil educational practices of the poor, founding, simultaneously, a pragmatic religious experience directed at the resolution of the problems caused by poverty. In that sense, we observe that such actions are connected to the broader process of moralization and education of the poor, but the analysis also suggests that their inscription into the social order articulated both forward as well as conservative aspects of the established system

Ideais formativos de homem da emissora de Educação Rural de Caicó (Rio Grande do Norte, 1963-1978)

Under the aegis of the third diocese bishop of Caicó, Dom Manuel Tavares de Araújo, the Broadcasting Station of Rural Education of that city was founded, in May 1 s" 1963 with the ideal of being then an educational city, preferentially for youths and adults, rural meu and women of the arca of Seridó in Rio Grande do Norte state. In the year of its 40th birthday (2003), we began the investigation of that radio station choosing as study object its educational and formative programming, in the inc1usion of the first fifteen years of its existence (1963-1978), period that reaches the official inauguration of the Radio Station and the end of the bishopric of its fOllllder as Bishop of Caicó. Elucidating and showing Man's formative ideaIs longed by that Catholic educational broadcasting station, underlying to its radiophonic programming, such as the idealization for it reached, is the objective of this Doctorate work. It was considered pertinent to discover the guidelines that historically have permeated the Social Doçtrine of the Catholic Church addressing its aggiornamento, especially in what concerns to the employment of the modern ways of communication for the distance with the aim of evangelizing and educating. In arder to understand the ideaIs of the investigated educational Radio, we have delimited the research to the thematic Catholic Church, means of social communication and base education. In face of the study object and the aim to be reached it was appealed, methodologically, to the notion of cultural action present in Certeau (1995), and to the understanding of educational formation backgrounded fIam the modern thinkers that discuss it. Such frame references have allowed us to analyze in a wider spectrum tl)e programming broadcasted on the air by the sound wavys of that educ(itional Çatholic Radio, as well as, the very acts of cultural idealizations that has orientated it in its foundations. The thesis here defended is that. the Radio, at procJaiming itself as a broadcasting station of rural education directed preferably to the rural sertanejo countrymen, without neglecting its admitted ends, has surpassed them in its overall range. It was identified an articulate approach of its programmatic modules with the guid,elines emanateq from the Catholic Teaching about the use of the. means of social communication. At conceiving, establishin,g and executing an ec1ectic programmatic and div,ersified grating, the Rural Radio of Caicó has transcended to a strict human-Christian formation to request the development of the human, spiritual and cQrporaldimensions, jointly. With suchprogramming, it addressed to the seridoenses as real meu and women inserted in the "sertanej.o" environment with effective structural and existential problems of alI types, induding the hunger, the thirst, the syndical organization, the cQoperativism, the colIective modero work and the absence of universalizing school education. Its radiophonic transmissions, I}lled by the demands of an enlarged, open, dialogic and responsible communication, wheneIllbracing dedicated modules to religious and catechetical emissions, to the entertainment, to the radiojoumalism, to the country root culture, and to the school education of b se for the modality of the School and of the radiophonic classes, subsumed to ideaIs that longed for the formation of a multifaceted and pluridimensional sertanejo Man; of men and women that, without abjuring the Catholicism, were able to understand, to dialogued and to live together with the general demands of a society in progressive mutation, whose economical, social, cultural and educational demands it IDade themselves to be felt through the sertão potiguar of the Serido region, equal way of the intemationalized world

Adelle de Oliveira: trajetória de vida e prática Pedagógica (1900-1940)

This work analyses pedagogical practices of Adelle Sobral de Oliveira, from 1900 to 1940, in order to notice how her performance as educator and administrator took place in Externato Angelo Varela in the Rio Grande do Norte city of Ceará-Mirim within a time in which the public teaching started to be considered modern in the State. Adelle was a self learner who developed an important role as a mentality mentor of a generation in the region. As the research corpus we have taken the five Reading Books written by Felisberto de Carvalho used by Adelle in her Externato, interviews with her ex-students and researches in the newspapers of her time, in the Public Archives and in the Historical and Geographic Institute of Rio Grande do Norte, and also in the governors messages, Education Department documents such as laws, and government decrees and acts. It was also taken as a research font the Publich Archives of Ceará-Mirim. The aim of this PhD thesis is understand the primary instruction spreading and modernization in the countryside of Rio Grande do Norte, which began with her teaching pedagogical practices. The research results show Adele Oliveira used practical and experimental modern methodological teaching methods in the subjects she taught. Due to this, in her scholar routine, she avoided physical punishment and mechanical teaching and learning strategies

Eram realmente pitagórico(a)s os homens e mulheres catalogado(a)s por Jâmblico em sua obra Vida de Pitágoras?

Pythagoras was one of the most important pre-Socratic thinkers, and the movement he founded, Pythagoreanism, influenced a whole thought later in religion and science. Iamblichus, an important Neoplatonic and Neopythagorean philosopher of the third century AD, produced one of the most important biographies of Pythagoras in his work Life of Pythagoras. In it he portrays the life of Pythagoras and provides information on Pythagoreanism, such as the Pythagorean religious community which resembled the cult of mysteries; the Pythagorean involvement in political affairs and in the government in southern Italy, the use of music by the Pythagoreans (means of purification of healing, use of theoretical study), the Pythagorean ethic (Pythagorean friendship and loyalty, temperance, self-control, inner balance); justice; and the attack on the Pythagoreans. Also in this biography, Iamblichus, almost seven hundred years after the termination of the Pythagorean School, established a catalog list with the names of two hundred and eighteen men and sixteen women, supposedly Pythagoreans of different nationalities. Based on this biography, a question was raised: to what extent and in what ways, can the Pythagoreans quoted by Iamblichus really be classified as Pythagoreans? We will take as guiding elements to search for answers to our central problem the following general objectives: to identify, whenever possible, which of the men and women listed in the Iamblichus catalog may be deemed Pythagorean and specific; (a) to describe the mystery religions; (b) to reflect on the similarities between the cult of mysteries and the Pythagorean School; (c) to develop criteria to define what is being a Pythagorean; (d) to define a Pythagorean; (e) to identify, if possible, through names, places of birth, life, thoughts, work, lifestyle, generation, etc.., each of the men and women listed by Iamblichus; (f) to highlight who, in the catalog, could really be considered Pythagorean, or adjusting to one or more criteria established in c, or also to the provisions of item d. To realize these goals, we conducted a literature review based on ancient sources that discuss the Pythagoreanism, especially Iamblichus (1986), Plato (2000), Aristotle (2009), as well as modern scholars of the Pythagorean movement, Cameron (1938), Burnet (1955), Burkert (1972), Barnes (1997), Gorman (n.d.), Guthrie (1988), Khan (1999), Mattéi (2000), Kirk, Raven and Shofield (2005), Fossa and Gorman (n.d.) (2010). The results of our survey show that, despite little or no availability of information on the names of alleged Pythagoreans listed by Iamblichus, if we apply the criteria and the definition set by us of what comes to be a Pythagorean to some names for which we have evidence, it is possible to assume that Iamblichus produced a list which included some Pythagoreans

Educar para o lar, educar para a vida :cultura escolar e modernidade educacional na Escola Doméstica de Natal (1914-1945)

La recherche propose un nouveau regard sur l Institution Scolaire École Doméstica de Natal, en essayant de tenir compte de la multiplicité des auteurs et des pratiques développées à l école qui définissaient le mieux et expliquaient les phénomènes de cette réalité éducative et des rapports avec le temps et le lieu où elle s insérait. Pour ce faire, les concepts de mémoire et culture scolaire ont été fondamentaux pour la compréhension de ces pratiques, parce qu ils ont contribué à notre lecture historique-culturelle de l ensemble d aspects institutionnalisés à l école, comme son curriculum, ses finalités, ses façons d enseigner et d apprendre, ses règles de conduite, ses normes, enfin, ce qui caractérisait son organisation et ses pratiques quotidiennes. C était l École Doméstica de Natal l institution pionnière dans le modèle d éducation féminine au Brésil, nous le reconnaissons en priorité et nous visons à le circonscrire à son indélébile contribution à l Histoire de l Éducation de Rio Grande do Norte. Conçue par un modèle d organisation scolaire européen pour l éducation féminine, l École Doméstica de Natal a été inaugurée en 1914, en ayant comme créateur l intelectuel de Rio Grande do Norte Henrique Castriciano de Souza. Sa singularité, s opposant aux écoles féminines existantes au Rio Grande do Norte et au Brésil en ce temps-là, était dû au modèle scolaire adopté, qui appuyait sur la formation d une femme préparée à répondre aux aspirations modernes surgissant avec l avènement de la République. Ce contexte exigeait de l école la formation d un modèle de femme dans les aspects moral, physique, culturel et intelectuel modelés sur les idéaux de l ordre et du progrès. Ce serait une nouvelle méthode d éducation scolaire qui pourrait favoriser la modernisation des anciennes méthodes d enseignement, provoquant le surgissement de modèles qui impliqueraient une nouvelle organisation pédagogique aux écoles de l`État et conduiraient la ville à de nouveaux et hauts paliers de culture et civilité. Avec cela, l école contribuerait à ce que la femme joue un rôle dans la société d une manière plus active, sociale et mieux adaptée. Les mots ordre, nouveau, civilité, moderne et progrès se répandaient et s entrecroisaient avec des valeurs archaïques toujours permanentes et enracinées dans la vision de vie et l idée de monde d alors. Ainsi, on voyait que l École Doméstica était une institution modèle, spécifique dans sa fonction, qui apporterait à la ville et, particulièrement au Rio Grande do Norte, des idées de civilité, ordre et progrès

Análise e síntese de antenas e superfícies seletivas de frequência utilizando computação evolucionária e inteligência de enxames

The frequency selective surfaces, or FSS (Frequency Selective Surfaces), are structures consisting of periodic arrays of conductive elements, called patches, which are usually very thin and they are printed on dielectric layers, or by openings perforated on very thin metallic surfaces, for applications in bands of microwave and millimeter waves. These structures are often used in aircraft, missiles, satellites, radomes, antennae reflector, high gain antennas and microwave ovens, for example. The use of these structures has as main objective filter frequency bands that can be broadcast or rejection, depending on the specificity of the required application. In turn, the modern communication systems such as GSM (Global System for Mobile Communications), RFID (Radio Frequency Identification), Bluetooth, Wi-Fi and WiMAX, whose services are highly demanded by society, have required the development of antennas having, as its main features, and low cost profile, and reduced dimensions and weight. In this context, the microstrip antenna is presented as an excellent choice for communications systems today, because (in addition to meeting the requirements mentioned intrinsically) planar structures are easy to manufacture and integration with other components in microwave circuits. Consequently, the analysis and synthesis of these devices mainly, due to the high possibility of shapes, size and frequency of its elements has been carried out by full-wave models, such as the finite element method, the method of moments and finite difference time domain. However, these methods require an accurate despite great computational effort. In this context, computational intelligence (CI) has been used successfully in the design and optimization of microwave planar structures, as an auxiliary tool and very appropriate, given the complexity of the geometry of the antennas and the FSS considered. The computational intelligence is inspired by natural phenomena such as learning, perception and decision, using techniques such as artificial neural networks, fuzzy logic, fractal geometry and evolutionary computation. This work makes a study of application of computational intelligence using meta-heuristics such as genetic algorithms and swarm intelligence optimization of antennas and frequency selective surfaces. Genetic algorithms are computational search methods based on the theory of natural selection proposed by Darwin and genetics used to solve complex problems, eg, problems where the search space grows with the size of the problem. The particle swarm optimization characteristics including the use of intelligence collectively being applied to optimization problems in many areas of research. The main objective of this work is the use of computational intelligence, the analysis and synthesis of antennas and FSS. We considered the structures of a microstrip planar monopole, ring type, and a cross-dipole FSS. We developed algorithms and optimization results obtained for optimized geometries of antennas and FSS considered. To validate results were designed, constructed and measured several prototypes. The measured results showed excellent agreement with the simulated. Moreover, the results obtained in this study were compared to those simulated using a commercial software has been also observed an excellent agreement. Specifically, the efficiency of techniques used were CI evidenced by simulated and measured, aiming at optimizing the bandwidth of an antenna for wideband operation or UWB (Ultra Wideband), using a genetic algorithm and optimizing the bandwidth, by specifying the length of the air gap between two frequency selective surfaces, using an optimization algorithm particle swarm