Made available in DSpace on 2014-12-17T14:55:19Z (GMT). No. of bitstreams: 1 PauloCSC_capa_ate_pag_14.pdf: 6010526 bytes, checksum: e2d3959764645f15a68a651383c52a92 (MD5) Previous issue date: 2002-05-10 / This work has as main objective to show all the particularities regarding the Three-phase Power Summation Method, used for load flow calculation, in what it says respect to the influence of the magnetic coupling among the phases, as well as to the losses presented in all the existent transformers in the feeder to be analyzed. Besides, its application is detailed in the study of the short-circuits, that happen in the presence of high impedance values, which possess a problem, that is its difficult detection and consequent elimination on the part of common devices of protection. That happens due to the characteristic presented by the current of short? circuit, in being generally of the same order of greatness that the load currents. Results of simulations accomplished in several situations will be shown, objectifying a complete analysis of the behavior of the proposed method in several types of short-circuits. Confront of the results obtained by the method with results of another works will be presented to verify its effectiveness / Este trabalho tem como objetivo principal mostrar todas as particularidades a respeito do M?todo da Soma de Pot?ncias Trif?sico, utilizado em c?lculo de fluxo de carga trif?sico, no que diz respeito ? influ?ncia do acoplamento magn?tico entre as fases, bem como ?s perdas apresentadas em todos os transformadores existentes no alimentador a ser analisado. Al?m disso, detalha-se a sua aplica??o no estudo dos curtos-circuitos, que ocorrem na presen?a de altos valores de imped?ncia, os quais possuem um problema a mais, que ? sua dif?cil detec??o e conseq?ente elimina??o por parte de dispositivos comuns de prote??o. Isso ocorre devido ? caracter?stica apresentada pela corrente de curto, em ser geralmente da mesma ordem de grandeza que as correntes de carga. Ser?o mostrados resultados de simula??es realizadas em diversas situa??es, buscando uma an?lise completa do comportamento do m?todo proposto em v?rios tipos de curtos-circuitos. Confronto dos resultados obtidos pelo m?todo com os de outros trabalhos ser?o apresentados como forma de verifica??o de sua efic?cia

Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico / The obtainment of information through the research has been decisive to provide technological support to sunflowers culture development, granting better productivities and economical incomes. Among the various technologies developed to sunflowers production, the adequate choice of cultivars constitutes one of the main components in the system of culture production. Considering the existence of the interaction genotypes x environment, researches are required, aiming to determine the agronomic behavior of genotypes and their adaptation to different environment conditions. Based on these principles, there were developed four experiments in CapitÃo PoÃo City, in Parà State, in Brazil, with two sunflower cultivars, Embrapa â 122 and Catissol. On experiment I, sunflower cultivarsâ plastochron was determined, sowed in two seasons in the year. On experiment II, the effect of different water slides over the productive behavior of sunflower cultivars was evaluated, which were cultivated in protected behavior, aiming to define criteria to irrigation handling. On experiment III, there were evaluated seven doses of boron (10 mg, 20 mg, 30 mg, 40 mg, 50 mg, 60 mg, 70 mg plant-1) and a witness, on the growing characteristics and on sunflower plants production. And on Experiment IV, the objective was to verify the relative content of water, the concentrations of total soluble amino acids, of total soluble proteins, of free ammoniums, deprolina and the activity of nitrate reductase, in sunflower leaves, in function of two cultivars and of different water slides. Through the obtained results, it was concluded that: the sowing seasons, the sub periods of vegetative development and the cultivars, possess different rights over the plastochron in sunflowers, with variations of 14,6 to 8787,0 ÂC day knot-1; the cultivar Catissol obtained values of mass of dried matter from the aerial part, mass of dried matter from the flower and the flower diameter responded in a linear way to the water slides. The variables, production, mass of 100 achenes and the number of leaves, were optimized by small doses of boron; and, finally, the applied water slides influenced on the concentrations of amino acids, protein, proline, relative content of water and on the activity of nitrate reductase, on sunflower leaves, as the genetic material in studies, presented different results, to these variables, excepting for the activity of nitrate reductase. Therefore, it was realized that sunflowers make mechanisms of osmotic adjustment in leaves, to tolerate various situations of humidity of water in the soil / A obtenÃÃo de informaÃÃes por meio da pesquisa tem sido decisiva para dar suporte tecnolÃgico ao desenvolvimento da cultura do girassol, garantindo maiores produtividades e retornos econÃmicos. Entre as vÃrias tecnologias desenvolvidas para a produÃÃo de girassol, a escolha adequada de cultivares constitui um dos principais componentes do sistema de produÃÃo da cultura. Diante da existÃncia de interaÃÃo genÃtipos x ambientes, sÃo necessÃrias pesquisas, a fim de determinar o comportamento agronÃmico dos genÃtipos e sua adaptaÃÃo Ãs diferentes condiÃÃes locais. Partindo desse principio, foram desenvolvidos quatro experimentos no municÃpio de CapitÃo PoÃo, PA, com duas cultivares de girassol, a Embrapa - 122 e Catissol. No experimento I, determinou-se o plastocrono das cultivares de girassol, semeadas em duas Ãpocas do ano. No experimento II, avaliou-se o efeito de diferentes lÃminas de Ãgua sobre o comportamento produtivo das cultivares de girassol, cultivadas em ambiente protegido, visando definir critÃrios para o manejo da irrigaÃÃo. No experimento III, avaliaram-se sete doses de boro (10 mg, 20 mg, 30 mg, 40 mg, 50 mg, 60 mg e 70 mg planta-1) e uma testemunha, nas caracterÃsticas de crescimento e produÃÃo de plantas de girassol. E no Experimento IV, o objetivo foi verificar o conteÃdo relativo de Ãgua, as concentraÃÃes, de aminoÃcidos solÃveis totais, de proteÃnas solÃveis totais, de amÃnio livre, de prolina e a atividade da redutase do nitrato, em folhas de girassol, em funÃÃo de duas cultivares e de diferentes lÃminas de Ãgua. A partir dos resultados obtidos, concluiu-se que: as Ãpocas de semeadura, os subperÃodos de desenvolvimento vegetativo e as cultivares, possuem efeito direto sobre o plastocrono em girassol, com variaÃÃes de 14,6 a 87,0 ÂC dia nÃ-1; a cultivar Catissol obteve valores de massa de matÃria seca da parte aÃrea, massa de matÃria seca do capÃtulo e o diÃmetro do capÃtulo superior a Embrapa â 122; para o efeito das lÃminas de Ãgua, a massa de 100 aquÃnios, a produÃÃo por planta, a massa de matÃria seca da parte aÃrea, a massa de matÃria seca do capÃtulo e o diÃmetro do capÃtulo responderam de modo linear as lÃminas de Ãgua. As variÃveis, produÃÃo, massa de 100 aquÃnios e nÃmero de folha, foram otimizadas por pequenas doses de boro; e por fim, as lÃminas de Ãgua aplicadas influenciaram nas concentraÃÃes de aminoÃcidos, de proteÃna, de prolina, do conteÃdo relativo de Ãgua e na atividade da redutase do nitrato, nas folhas de girassol, assim como o material genÃtico em estudo, apresentou resultados diferenciados, para essas variÃveis, com exceÃÃo da atividade da redutase do nitrato. Portanto, percebeu-se que o girassol desempenha mecanismos de ajustamento osmÃtico nas folhas, para tolerar diversas situaÃÃes de umidade de Ãgua no solo

Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2015-05-15T12:17:57Z No. of bitstreams: 2 Dissertação - Nara Reges Faria de Paiva Pereira - 2015.pdf: 435464 bytes, checksum: 6776c7dd920e750745f00bb8099efa97 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2015-05-15T12:24:25Z (GMT) No. of bitstreams: 2 Dissertação - Nara Reges Faria de Paiva Pereira - 2015.pdf: 435464 bytes, checksum: 6776c7dd920e750745f00bb8099efa97 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Made available in DSpace on 2015-05-15T12:24:25Z (GMT). No. of bitstreams: 2 Dissertação - Nara Reges Faria de Paiva Pereira - 2015.pdf: 435464 bytes, checksum: 6776c7dd920e750745f00bb8099efa97 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2015-03-02 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / In this work we study some results about Davenport’s constant for finite abelian groups. We also study some weighted zero-sum problems for especific cyclic groups and for this we prove some relations between the invariants sA, gA e hA for such groups. / Neste trabalho estudamos resultados sobre a constante de Davenport para grupos abelianos finitos. Estudamos também alguns problemas de soma-zero com peso para grupos cíclicos específicos e, para isto, provamos relações entre os invariantes sA, gA e hA para tais grupos.

Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico / Estudamos as estruturas e as propriedades dinÃmicas de um cristal clÃssico bidimensional (2D) em bicamadas de partÃculas dipolares magnÃticas carregadas em um arranjo no qual os dipolos sÃo perpendiculares Ãs camadas e com mesma densidade de partÃculas em cada camada. A energia do sistema à devido à interaÃÃo carga - carga (interaÃÃo coulom- biana) e a interaÃÃo dipolo - dipolo. Devido ao fato dessas interaÃÃes serem de longo alcance, usamos o mÃtodo da soma de Ewald para obter uma expressÃo para a energia envolvendo somas que convergem rapidamente. Comparando as energias de possÃveis geometrias do cristal, determinamos o diagrama de fase do sistema em funÃÃo do parÃmetro η (que està relacionado com a distÃncia entre as camadas de dipolos magnÃticos carregados e a densidade de partÃculas) e da intensidade relativa das interaÃÃes elÃtrica e magnÃtica. Mudando a intensidade relativa da interacÃo dipolo - dipolo com respeito à interaÃÃo elÃtrica, podemos encontrar seis diferentes estruturas cristalinas estÃveis em funÃÃo de η. Uma caracterÃstica interessante desse sistema à a possibilidade de permanecer em arranjos nos quais as camadas sÃo ou nÃo deslocadas uma em relaÃÃo a outra, apenas variando a interaÃÃo magnÃtica entre os dipolos, por exemplo, atravÃs de um campo magnÃtico externo. As transiÃÃes entre as estruturas cristalinas podem ser contÃnuas e descontÃnuas. No intuito de investigar a estabilidade das configuraÃÃes de mÃnima energia, calculamos o espectro dos fÃnons do sistema usando a aproximaÃÃo harmÃnica. Para isto, recorremos novamente a tÃcnica de Ewald para obter somas que convergem rapidamente. A anÃlise da relaÃÃo de dispersÃo (fÃnons) revela caracterÃsticas do sistema que sÃo de grande utilidade no estudo da transiÃÃo sÃlido-lÃquido (fusÃo). / We study the structural and dynamical properties of a two-dimensional (2D) classical bi-layer crystal of charged magnetic dipolar particles in a setup where the dipoles are oriented perpendicular to the layers and equal density of charged dipolar particles in each layer. The energy of the system is due to the charge - charge interaction (Coulomb interaction) and the dipole - dipole interaction. Due to the long-range nature of the interactions, we use the Ewald summation method to obtain an expression for the energy involving rapidly convergent sums. By comparing the energies of a number of possible crystal geometries, we determine the phase diagram of the system as a function of the parameter η (which is related to the separation between the layers of charged magnetic dipoles and the particle density) and the relative intensity of the magnetic and electrical interactions. By changing the relative intensity of the dipole - dipole interaction with respect to electrical one, we are able to find six diferent stable crystalline structures as a function of η. An interesting feature of the present model system is the possibility to tune between the matched and staggered arrangements by varying the magnetic interaction between the dipoles, e.g. through an external magnetic field. The phase boundaries of the crystalline structures consist of both continuous and discontinuous transitions. In order to investigate the stability of the minimum energy arrangements we also calculate the phonon spectra of the system within the harmonic approximation. In this case, we resort again on the Ewald technique to obtain the rapidly convergent sums. The analysis of the phonon spectra reveals interesting features which are useful in the study of melting.

Submitted by Renata Lopes (renatasil82@gmail.com) on 2018-03-09T14:02:43Z No. of bitstreams: 1 beatrizcasularidamottaribeiro.pdf: 51480863 bytes, checksum: 2903f1e799aced3e464287427769a5ad (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2018-03-12T15:53:08Z (GMT) No. of bitstreams: 1 beatrizcasularidamottaribeiro.pdf: 51480863 bytes, checksum: 2903f1e799aced3e464287427769a5ad (MD5) / Made available in DSpace on 2018-03-12T15:53:08Z (GMT). No. of bitstreams: 1 beatrizcasularidamottaribeiro.pdf: 51480863 bytes, checksum: 2903f1e799aced3e464287427769a5ad (MD5) Previous issue date: 2011-12-06 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico / PROQUALI (UFJF) / Obtemos novos arcos completos associados ao conjunto de pontos racionais de uma certa generalização da curva Hermitiana que é Frobenius não-clássica. A construção está relacionada ao cálculo do número de pontos racionais de uma classe de curvas de Artin-Schreier. / We obtain new complete arcs arising from the set of rational points of a certain generalization of the Hermitian plane curve which is Frobenius non-classical. Our construction is related to the computation of the number of rational points of a class of Artin-Schreier curves.

Presented diploma thesis deals with development of the autonomous electric energy source for Health and Usage Monitoring Systems placed at the rear part of a helicopter. Firstly, the HUMS systems were described briefly and the research of available energy sources was made after that. After that, the magnetic properties of the materials were described with the special focus on the permanent magnets. The draft also includes the creation of model of the magnetic field using the final element method. Prototype was assembled and the other design solutions were evaluated. The evaluation of various designs passed in the use of SOMA optimization algorithms. The generator is followed by the draft of the electronics, which streamlines and regulates a voltage supplied by the generator. At the end of the thesis, the complete source prototype was assembled and tested with two different regulators

Estetiker inom design är ofta subjektiva, då vad som definierar interaktionens kvaliteter skiljer sig åt mellan dem. Vissa estetiker kan dock visas distinkt genom kroppsspråk, vilket påståendevis skulle vara en mer konkret metod för att förmedla upplevelser och intryck. Detta arbete utforskar trivsamt passivt gungande, ur perspektivet av en dansare och massör, genom first-person research. Den dokumenterar sedan designprocessen av en artefakt som har förmågan att kunna återskapa denna sensation. Gungande valdes på grund av personliga erfarenheter och intresse för hur det kan visas genom att endast använda kroppen, till skillnad från många andra estetiker. Genom att använda metoder inom Soma Design kombinerat med first-person research började denna process med brainstormingaktiviteter kring gungande och fortsatte sedan med att genom Feldenkrais-inspirerade aktiviteter främmandegöra konceptet. Med den nyvunna förståelsen av gungning skapades en formförändrande nackkudde kallad "The Neck Hammock" för att framkalla en gungande sensation hos en dansare eller en massör. Kvantitativt utforskande av rörelserna som skapades av "The Neck Hammock" placerade gungande längs et spektrum av olika upplevelser och visade även att den djupt själviaktagande upplevelsen kan resultera i starka minnesbilder och associationer av tidigare upplevelser. Dessa associationergjorde det enkelt at kategorisera en session med "The Neck Hammock", då framgångsrika sessioner väckte minnen från erfarenheter av gungstolar, hängmattor mm. Detta tyder på att individuella responser på "The Neck Hammock" kommer att vara unika och baserade på varje användares tidigare erfarenheter av gungande, trots att allmänna egenskaper som t.ex. behagligheten i det hela lär finnas kvar. Trots att många sessioner förmedlade en sensation av gungande var det fåsom passade perfekt in i det sökta ,trivsamma, passiva gungandet. De sessioner som var framgångsrika och framkallade tydliga minnesbilder hade en betydande känslomässig påverkan och orsakade stundom långvariga känslor i hela kroppen. / Aesthetics in design are often subjective because definitions of the qualities of interaction differ. Some aesthetics, however, can be distinctly shown with body movement, perhaps offering a more concrete method to communicate experience. This thesis explores a first-person understanding, as a dancer and masseuse, of pleasant passive rocking. It then documents the design process of an artefact capable of conveying the same experience. Rocking was chosen due to personal history and interest in how it can be shown explicitly using the body, unlike many other aesthetics. Using first-person Soma Design methods, this process began with brainstorming attributes of rocking and later utilized defamiliarization through Feldenkrais-inspired activities. With the newfound understanding of rocking, a shape-changing neck pillow named the Neck Hammock was created to evoke a dancer’s and masseuse’s rocking. Quantitative exploration of the Neck Hammock movement placed rocking along a spectrum of experience, and also revealed that the deeply introspective experience can result in vivid mental visualizations of past lived experiences. These visualizations made categorizing a session with the Neck Hammock simple, as successful trials evoked memories of hammocks, rocking chairs, etc. This suggests that individual responses to the Neck Hammock will be unique based upon the user’s past associations with rocking, though general qualities like pleasantness ought to remain. While many trials conveyed rocking, few aligned perfectly with the targeted pleasant passive rocking. The trials that were successful and caused a mental visualization had significant emotional impact and sometimes caused long-lasting full body experiences.

Drawing on phenomenology and the theory of embodied music cognition, and the idea that music is movement and the way we experience music is related to movement and to our bodies, the design and conception of a musical instrument is carried out through a soma design process, with the non-dualistic body at center. In addition to the use of design fiction as a means to imagine new design possibilities, practical somaesthetics are a part of the design process through the bodily practices of Dalcroze eurhythmics and instrument defamiliarisation. These continuous bodily practices provide space for explorations of musical, aesthetic sensitivities and contribute to the designer's attuning to their own body and discoveries of musical sensitivities therein. The experiential qualities of music--movement related rhythm and repetition are identified, and reflected in the design of the musical instrument. While interacting with the instrument does not necessarily provide direct immersion into those experiential qualities, nor an intimate musician--instrument relationship, it might however, open up a fertile breeding ground for new design directions and make space for new experiences. The design process itself, leading up to the instrument, was a great contribution to making room for exploring interactions with the body, movement and music. / Med utgångspunkt i fenomenologi och teorin om förkroppsligad musikkognition, samt iden att musik ar rörelse och att hur vi upplever musik ar relaterat till rörelse och vara kroppar, har designen och skapandet av ett musikinstrument utförts genom en soma-designprocess, med den icke-dualistiska kroppen i centrum.  Utöver användandet av designfiktion som ett satt att föreställa sig nya designmöjligheter, ingår praktisk somaestetik som en del av designprocessen via dem kroppsliga praktikerna Dalcroze-rytmik och instrument-främmandegöring. Dessa kontinuerliga, kroppsliga praktiker ger utrymme for utforskning av musikaliska och estetiska mottagligheter och bidrar till designerns själsstämning av sin egen kropp, samt upptäckter av musikaliska mottagligheter inuti densamma.  De empiriska kvaliteterna hos musik-rörelserelaterad rytm och repetition identifieras och återspeglas därefter i utformningen av musikinstrumentet. Aven om interaktion med instrumentet inte nödvändigtvis leder till en direkt upplevelse av dessa kvaliteter, eller en intim musiker-instrument-relation, sa kan den emellertid lagga en bördig grogrund for nya designriktningar och skapa utrymme for nya upplevelser. Själva designprocessen, som lett fram till instrumentet, gav stora möjligheter till att skapa plats for att utforska interaktioner med kroppen, rörelse och musik.

Breast awareness is a topic related to women's daily life. The purpose of this project is to explore the behaviors of knowing breasts from the perspective of women themselves, intending to design body experiences that facilitate the awareness of breast muscles and skin movements. The thesis begins with early-stage explorations of the meanings and methodologies of breast awareness and illustrates the entire process from preliminary research to prototyping procedure. Concepts and design methods of soma design are used to explore what kinds of interactions could be outlined in the breast sensing journey. The research process and design results propose new ways of interaction design for breast awareness, exploring the application of new material properties in soma design and breast knowing approaches. As the outcome, Sensorial Pads are made out of silicone, intending to emphasize skin tactile feeling and visual interaction for breast cognition. / Att förstå bröst är ett ämne relaterat till kvinnors dagliga liv. Syftet med detta projektär att utforska beteendet med bröstigenkänning ur kvinnors perspektiv och är avsett att utforma en fysisk upplevelse som hjälper till att förstå bröstmuskel- och hudrörelser. Denna avhandling undersöker betydelsen och metoderna för bröstigenkänning från ett tidigt skede och förklarar hela processen från preliminär forskning till prototypprocedurer. Med hjälp av konceptet och designmetoden för soma design, ta reda på vilken typ av interaktion som kan beskrivas i medvetenhet om brösten. Forskningsprocessen och designresultaten syftar till att föreslå en ny interaktiv designmetod för bröstkognition och utforska tillämpningen av nya materialegenskaper i soma design och ökad kunskap om brösten. Som ett resultat är sensorkudden gjord av silikon, som är avsedd att betona hudens brösttaktilitet och visuell interaktion.

There has been a recent increase in breathing as an activity within HCI; however, breathing as the source of voice has not been explored. This thesis explores how ADA (air-driven actuator), a haptic wearable garment, may be used by singers to connect with their breath. Primarily through first-person engagement with vocal training and first-person evaluation of ADA’s capability to support vocal practice, the thesis addresses how the garment functionally and experientially supports singers’ movements. Thematic analysis results in two main lines of functional use (demonstrations, and prompts), and engagement with the garment in these two usages builds three conceptualizations of how ADA can align with a singer’s breath (through posture adjustments, inhalation as expansion, and inhalation as tension). Further thematic analysis shows how users characterize experiences with ADA as distinguished by anticipation or layering, offering insight into what experimental qualities underlie the functional use of ADA. The thesis highlights implications for future generative work in the breathing design space, offering tension-release as a breath representation, and a suggestion to explore exhalation duration as a breath parameter through the prolongations of exhalations in singing. Furthermore, it highlights layering as a quality that may be of relevance to further development of ADA, or other experience-oriented technology that aims to support movement practice.