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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Fluency and controlled-operant training methods

Oddsson, Finnur. January 1998 (has links)
Thesis (M.A.)--West Virginia University, 1998. / Title from document title page. Document formatted into pages; contains viii, 79 p. : ill. Includes abstract. Includes bibliographical references (p. 66-68).
12

Optimal binary decision trees for diagnostic identification problems

Garey, Michael R. January 1970 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliography.
13

Agents, games and networks

Smith, David M. D. January 2007 (has links)
No description available.
14

Conversion of thin surface solids to BSP solid sets with visualization and simulation applications

Murray, Jeremy W. January 2008 (has links)
Thesis (M.S.)--University of Nevada, Reno, 2008. / "August 2008." Includes bibliographical references (leaves 52-55). Online version available on the World Wide Web.
15

Universal cycles for (n-1)-partitions of AN n-set /

Casteels, Karel, January 1900 (has links)
Thesis (M. Sc.)--Carleton University, 2004. / Includes bibliographical references (p. 38-39). Also available in electronic format on the Internet.
16

Mining simple and complex patterns efficiently using binary decision diagrams /

Loekito, Elsa. January 2009 (has links)
Thesis (Ph.D.)--University of Melbourne, Dept. of Computer Science and Software Engineering, 2009. / Typescript. Includes bibliographical references (p. 209-228)
17

Η διδασκαλία του δυαδικού συστήματος με χρήση κατάλληλου εκπαιδευτικού λογισμικού : μια μελέτη περίπτωσης

Δημητρέλλου, Μαρία 14 February 2012 (has links)
Στην εργασία αυτή προσπαθήσαμε να διερευνήσουμε τις μαθησιακές επιδράσεις κατάλληλα κατασκευασμένου λογισμικού με χώρο αναφοράς το Δυαδικό Σύστημα. Το λογισμικό κατασκευάστηκε σε HTML και για τις ασκήσεις χρησιμοποιήθηκε το λογισμικό ProProfs. Παράλληλα εξετάσαμε τις δυνατότητες που προσφέρουν σύγχρονα διαδικτυακά εργαλεία στη δημιουργία λογισμικού και ιδιαίτερα ασκήσεων συνδεδεμένων με ιστοσελίδες πληροφοριών. Τα αποτελέσματα έδειξαν ότι το λογισμικό βοήθησε το δείγμα των 31 μαθητών, που χρησιμοποιήθηκε στην έρευνα, να μάθουν καλύτερα τις έννοιες του περιεχομένου. Σε αυτό βοήθησαν διάφοροι παράγοντες, οι οποίοι αναλύονται στην εργασία. / In this study we tried to investigate the learning effects of a properly engineered software based on binary system. The software built into HTML and for the exercises ProProfs software was used. Furthermore, we examined the potential of modern online tools to create software and specially exercises linked to information pages. The results showed that the software helped the sample of 31 students that was used in the study, to learn better the concepts of the content. In this helped a number of factors that are analyzed in the study.
18

Estudo das propriedades estruturais e dinâmicas de um sistema binário quasi-unidimensional / Structural and dynamical properties of a quasi-onedimensional classical binary system

Oliveira, Paulo William Simão de January 2007 (has links)
OLIVEIRA, Paulo William Simão de. Estudo das propriedades estruturais e dinâmicas de um sistema binário quasi-unidimensional. 2007. 105 f. Dissertação (Mestrado em Física) - Programa de Pós-Graduação em Física, Departamento de Física, Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2007. / Submitted by Edvander Pires (edvanderpires@gmail.com) on 2015-05-22T19:35:48Z No. of bitstreams: 1 2007_dis_pwsoliveira.pdf: 2259918 bytes, checksum: 48074a559be7bed99a345a92c3c2a969 (MD5) / Approved for entry into archive by Edvander Pires(edvanderpires@gmail.com) on 2015-05-22T20:06:53Z (GMT) No. of bitstreams: 1 2007_dis_pwsoliveira.pdf: 2259918 bytes, checksum: 48074a559be7bed99a345a92c3c2a969 (MD5) / Made available in DSpace on 2015-05-22T20:06:53Z (GMT). No. of bitstreams: 1 2007_dis_pwsoliveira.pdf: 2259918 bytes, checksum: 48074a559be7bed99a345a92c3c2a969 (MD5) Previous issue date: 2007 / The aim of this work is to study the structural and dynamical properties of a classical binary system of charged particles confined in a two dimensional channel. Such a system is described in the literature as quasi-unidimensional, and its relevance is supported by the possibility of technological applications, shown recently in the scientific literature, and also the interest and understanding of properties in condensed matter physics. Although the theoretical and numerical character of the present work, several experimental systems can be described by the present model. The summary of the contents of this work is presented in each chapter. In chapter 1, a general overview is given. The concept of Wigner crystallization is introduced, and examples of experimental systems, which exhibit such an ordered phase under proper conditions are given. We discuss the physics of complex plasmas, colloidal suspensions and applications in biological systems. A description of the simulation method is given in chapter 2. Scale transformations are introduced in order to construct a general model, i.e. no longer depending on particular features of the system, but only on relevant parameters of a general model. The Molecular Dynamics simulation technique (MD) is presented, focusing on the Langevin Dynamics. The competition between the inter-particle interaction, in the form of the electrostatic repulsion, and the external confinement, which is assumed to be parabolic and act only in one direction, generates a chain-like strutural pattern. A description of the model, the harmonic approach used in the analytical calculations of the normal modes spectrum, and the analytical calculation of the energy per particle of the different chain-configutations are given in chapter 3. The ground state configurations, the structural phase transitions and normal modes of the present chain-like binary system are presented in Chapter 4. In the low density regime particles crystallize in a single chain. When the density is increased a zig-zag transition occurs and the single chain splits into two chains. Such a transition is characterized by a spontaneous symmetry breaking. With the increase of the density the system changes to the four-chains configuration (case 1) (particles not aligned vertically), where the two -> four chains (case 1) transition occurs through a zig-zag transition accompanied by a shift along the chain direction. A further increase of the density will lead the system to a new ground state configuration with four chains (case 2) (particles aligned vertically). The dynamical properties are related to the phonon spectrum, in which the number of normal modes is two times the number particle in the unit cell. The conclusions and perspectives are presented in chapter 5. / O objetivo deste trabalho é estudar as propriedades estruturais e dinâmicas de um sistema binário clássico consistindo de partículas carregadas que estão confinadas em um canal bidimensional. Tal sistema é descrito na literatura como quasi-unidimensional, e esta relevância apoia-se na possibilidade de aplicações tecnológicas, como tem sido mostrado recentemente na literatura científica, bem como no interesse e entendimento em propriedades da Física da matéria condensada. Apesar do caráter teórico do presente estudo, diversos sistemas experimentais podem ser descritos pelo modelo aqui considerado. O resumo do conteúdo deste trabalho é apresentado em cada capítulo. No capítulo 1, é dada uma visão geral do presente trabalho. O conceito da cristalização de Wigner é introduzido e são dados exemplos de sistemas experimentais, que exibem uma fase ordenada sob circunstâncias apropriadas. Discute-se a Física dos plasmas complexos, das suspensões coloidais e aplicações em sistemas biológicos. Uma descrição do método de simulação é dada no capítulo 2. As transformações de escalas são introduzidas a fim de construir um modelo geral, isto é, não dependente das características particulares do sistema, mas somente das quantidades relevantes gerais. Apresenta-se a técnica de simulação por Dinâmica Molecular (DM), focalizando também a Dinâmica de Langevin. A competição entre a interação entre partícula, na forma de repulsão eletrostática, e o confinamento externo, que é suposto parabólico e age somente em uma direção, gera uma estrutura de cadeias no sistema. Uma descrição do modelo, bem como a aproximação harmônica utilizada para o cálculo dos modos normais e o cálculo da energia por partícula das várias estruturas de cadeias são dadas no capítulo 3. A configuração do estado fundamental, as transições estruturais de fase e modos normais para o sistema binário de cadeias são examinadas no capítulo 4. Para baixas densidades as partículas cristalizam-se em uma única cadeia; com o aumento da densidade uma transição zig − zag ocorre e a única cadeia se parte em duas. Observa-se que esta transição estrutural é caracterizada por uma quebra espontânea de simetria. Com o aumento da densidade, o sistema passa para quatro cadeias (caso 1) (partículas não alinhadas na vertical), onde a transição de duas para quatro cadeias (caso 1) ocorre com uma transição zig − zag, em cada uma das cadeias, acompanhadas por um deslocamento ao longo da direção da cadeia. Então com um aumento da densidade conduzirá a uma nova estrutura de quatro cadeias (caso 2) (partículas alinhadas na vertical). As propriedades dinâmicas aqui consideradas resumem-se ao espectro de fônons, no qual o número de modos normais é igual ao dobro do número de partículas na célula unitária. As conclusões e perspectivas são apresentadas no capítulo 5.
19

Regiões de estabilidade no sistema Plutão-Caronte

Guimarães, Ana Helena Fernandes [UNESP] 08 August 2006 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:22:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-08-08Bitstream added on 2014-06-13T18:49:26Z : No. of bitstreams: 1 guimaraes_ahf_me_guara.pdf: 2381225 bytes, checksum: 8019dfa6ffed11e95f9f5a24914be192 (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / Universidade Estadual Paulista (UNESP) / Plutão e Caronte, bem como os novos satélites do sistema, Nix e Hidra, são alvos de micrometeoritos, provavelmente originários do cinturão de Kuiper. Os resíduos destes impactos permaneceriam no sistema em órbitas ao redor de Plutão ou Caronte. Este estudo analisa, através de simulações numéricas, a estabilidade das regiões ao redor do sistema binário. Esta análise deu-se através de simulações numéricas para o problema restrito de três corpos. Foram numericamente integradas órbitas para partículas ao redor de Plutão, ao redor de Caronte e ao redor do baricentro do sistema. Dessas integrações numéricas foram geradas grades a x e, definindo-se regiões: de estabilidade, de escape e de colisão. A região estável ao redor de Plutão vai até aproximadamente 8200km, ao redor de Caronte se estende até 2900km e ao redor do baricentro do sistema binário, órbitas Tipo-P, a região estável inicia-se a partir de 49000km. Estes valores estão de acordo com a teoria de Holman e Wiegert (1999). As regiões de estabilidade de Plutão Caronte foram também amplamente estudadas através do uso da Superfície de Secção de Poincaré (SSP). Um conjunto de cerca de 230 SSP foi obtido. Foram gerados diagramas de Cjxx, Cj é o valor da Constante de Jacobi, derivados das SSP para a região interna aos corpos massivos do binário e externa a eles. Estes diagramas representam a síntese da análise da estabilidade por meio das SSP. Neles ficam determinadas as regiões estáveis às partículas no sistema. Cojuntos especiais de SSP foram gerados para análise das ressonâncias 1:6 e 1:4, pois estas, em especial, estariam relacionadas aos novos satélites. Verificou-se que estes satélites estão em regiões estáveis, mas não em ressonância de acordo com o dados até hoje conhecidos. / Pluto and Charon and the two new discovered satellites, named Hydra and Nix, are targets of micrometeorites which were probably originated from the Kuiper belt. A sample of particles can be generated from these collision and be trapped in orbit around Pluto or Charon. This work analyses, through numerical simulations, the stable regions around the binary system. This analysis took into account the Restricted Three Body Problem. From these numerical simulations diagrams of a x e were generated defining, stable, escape and unstable regions. Stable regions around Pluto (width about 8200km), around Charon (width about 2900km) and around the baricentre of the binary system (after a semi-major axis about 49000km) were obtained. These values are in good agreement with the work by Holman & Wiegert (1999). These stable regions were also analysed by using the technique of POincaré Surface of Section (PSS). A sample of about 230 PSS was obtained. In all these PSS chaotic and stable regions and also the resonance locations were identified. Diagrams of Cj x x, derived from the PSS, were obtained. They represent the synthesis of the stability region acquired from the PSS. A particular set of SSP was generated in order to analyse the evolution of 1:4 and 1:6 resonances. The new satellites, Hydra and Nix, are located in stable regions although, they are not in resonances with Charon, as can be seen in the grade a x e.
20

Determination of Ion Exchange Parameters for Binary Systems and Application to Ternary Systems

Boyer, William D.A. 08 1900 (has links)
<p>Ion exchange equilibrium data can be used to predict the viability of a proposed process. Ion exchange equilibria have been studied considerably since the 1950's but the complexity of the basic research has tended to reduce its direct usefulness to the practising engineer. This research has been undertaken to determine if a moderately simple method of experimentation and analysis could be applied to predict ion exchange equilibria to within limits of accuracy acceptable to engineers.</p> <p> The first step in the research was to develop a simple mathematical model for a binary system to calculate the selectivity coefficient and resin capacity from batch experiments. The model was successfully applied for the exchange of Na+ with five heavy metal ions: Ni²⁺; Cu²⁺; Cd²⁺; Pb²⁺ and Zn²⁺ on a typical commercial resin (Dowex HCR-W2). The binary parameters were then used to predict the equilibrium values for several ternary systems. From these ternary experiments, it was determined that binary data can be used to predict ternary systems if the selectivity coefficients of the two ions involved are either almost equal or differed by at least a factor of five. A kinetic effect was proposed to explain the discrepancies observed between the predicted and experimental values for the intermediate ratios of selectivity coefficients of the involved ions, although further work is required to confirm this hypothesis.</p> <p> Several packed bed experiments were performed to check some of the results from the binary and ternary system experiments and as exploratory work for future research. These experiments confirmed the capacity data calculated from the binary system experiments and were consistent with the trends observed in the ternary system experiments.</p> / Thesis / Master of Engineering (ME)

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