The goal of this thesis is to derive an accurate confidence interval after a sequential test with Christmas tree boundaries. We shall begin with an approximate pivot based on signed-root transformation, then apply the procedure of Weng and Woodroofe [2000] to derive an improved confidence interval. Accuracy of the theoretical result is investigated by simulations.

With the recent signing of an economic cooperation pact between Taiwan and China, crossstrait relations have entered a new era that could eventually make rapprochement a peaceful process. The Economic Cooperation Framework Agreement (ECFA), which is a free trade agreement in substance if not in name, is initially aimed at normalizing cross-strait economic relations, though it could further raise the issue of a possible freeze on U.S. arms sales to Taiwan. After all, if Taipei and Beijing are actively working on burying the hatchet, should the United States change its long-standing policy of providing weapons to Taiwan? Recall that the U.S. government’s decision to sell more than US$6 billion worth of military equipment to Taiwan earlier this year set off furious reprisals from Chinese authorities who summoned the U.S. ambassador and defense attaché in China and threatened to punish U.S. companies that make and sell weapons to Taiwan.

For modelling curves, B-splines [3] are among the most versatile control schemes. However, scaling this technique to surface patches has proven to be a non-trivial endeavor. While a suitable scheme exists for rectangular patches in the form of tensor product B-splines, techniques involving the triangular domain are much less spectacular. The current cutting edge in triangular B-splines [2] is the DMS-spline. While the resulting surfaces possess high degrees of continuity, the control scheme is awkward and the evaluation is computationally expensive. A more fundamental problem is the construction bears little resemblance to the construction used for the B-Spline. This deficiency leads to the central idea of the thesis; what happens if the simple blending functions found at the heart of the B-Spline construction are used over higher dimension domains? In this thesis I develop a geometric generalization of B-Spline curves over the triangular domain. This construction mimics the control point blending that occurs with uniform B-Splines. The construction preserves the simple control scheme and evaluation of B-Splines, without the immense computational requirements of DMS-splines. The result is a new patch control scheme, the G-Patch, possessing <i>C</i>0 continuity between adjacent patches.

For modelling curves, B-splines [3] are among the most versatile control schemes. However, scaling this technique to surface patches has proven to be a non-trivial endeavor. While a suitable scheme exists for rectangular patches in the form of tensor product B-splines, techniques involving the triangular domain are much less spectacular. The current cutting edge in triangular B-splines [2] is the DMS-spline. While the resulting surfaces possess high degrees of continuity, the control scheme is awkward and the evaluation is computationally expensive. A more fundamental problem is the construction bears little resemblance to the construction used for the B-Spline. This deficiency leads to the central idea of the thesis; what happens if the simple blending functions found at the heart of the B-Spline construction are used over higher dimension domains? In this thesis I develop a geometric generalization of B-Spline curves over the triangular domain. This construction mimics the control point blending that occurs with uniform B-Splines. The construction preserves the simple control scheme and evaluation of B-Splines, without the immense computational requirements of DMS-splines. The result is a new patch control scheme, the G-Patch, possessing <i>C</i>0 continuity between adjacent patches.

The backlight module is usually used to increase visual angle and brightness of liquid crystal display (LCD). Thus, the design and fabrication of optical films, including light guide plate, diffuser film, and brightness enhancement film (BEF), are critical factors to decide the optical efficiency in a backlight module. In order to improve the optical efficiency for power-saved display with competitiveness, this study presents a new fabrication process combining precision machining, lithography, and hot-embossing techniques to form a two-side-patterned optical film. One side of the optical film is micro triangular-pyramidal array (MTPA) and the other is micro spherical lens array(MSLA). First, the Taguchi method is applied to design the optimal microstructure configuration by the assistance of the optical software, FRED. Second, a tungsten (W) steel mold (as the mold to hot emboss MTPA) is manufactured by precision machining including optical projection grinding, lapping, and polishing processes. Meanwhile, a nickel-cobalt (Ni-Co) mold (as the mold to hot emboss MSLA) is fabricated by electroplating process. Then, polydimethylsiloxane (PDMS) is used to replicate the MTPA and MSLA patterns, on W and Ni-Co metal molds, respectively, and the replicated PDMS films are used as the molds to form a two-side-patterned optical film. In addition, the optical property such as luminance is measured by photo research 650 (PR 650) to evidence the optical function of the two-side-patterned optical film. From the experimental results, both brightness and uniformity can be improved by this film;thus, optical efficiency is successfully increased in this study.

With recent growth in mobile components and advances in wireless communication technology, mobile computing is an increasingly important area of research. Enabling mobility in IP networks becomes more and more significant. Mobile IP is the only current means for offering seamless roaming to mobile computers in the Internet. It has recently progressed along the ladder to standardization within the Internet Engineering Task Force (IETF). However, Mobile IP suffers from so-called triangular-routing problem and packet loss due to handoff. In this paper, we propose a new architecture to solve these two problems noted above. We assume that network routers such as Home Agent¡BForeign Agent¡BGeneral Router can equip our Pre-Accessing Engine (Mobile IP Engine) to access IP packets before IP routing Engine. With our Mobile IP table established in Mobile IP Engine, we can set up a transmission path for each correspondent node (CN) to transmit data to mobile node (MN). Therefore, we not only solve triangular-routing problem by direct transmission path, but also decrease handoff latency from path updating function. Furthermore, we use retransmission and flush schemes to avoid packet loss and out-of-order problems. Finally, we use simulation to prove our architecture is useful.

In this thesis two different research topics are undertaken, both in the area of compact RF/microwave circuits design. The first topic involves the design of a compact circularly polarized (CP) slot-ring antenna. A study of several compact CP microstrip and slotline antennas reported in the past has been carried out. In this research, a method of reducing the size of a printed slot-ring antenna is proposed. The reduction in size is achieved by introducing meandered-slot sections in the ring. Circular polarization is achieved by introducing an asymmetry, also a meandered-slot section, and feeding the antenna at an angle of 45o from the asymmetry using a microstrip feed line. The minimum axial ratio of 0.4 dB is obtained at 2.46 GHz, which is the operating frequency of the antenna. The size of the proposed antenna is reduced by about 50% compared to a conventional CP slot-ring antenna and it displays a CP bandwidth of about 2.5%. The simulated and measured results are presented, and they are in good agreement. The small size of the antenna makes it very suitable for use in modern RF/microwave wireless systems which require compact, low cost, and high performance circuits. Moreover, its CP behavior makes it more attractive for applications such as satellite communications. The second topic in the thesis involves the design of a compact microstrip bandpass filter using triangular open-loop resonators. A new compact three-pole microstrip bandpass filter using four triangular open-loop resonators is presented. A fourth resonator is placed to provide cross-coupling in the structure which gives a better skirt rejection. The measured pass-band center frequency is 2.85 GHz. The filter demonstrates about 7% bandwidth with insertion loss of less than 1 dB in the passband, a return loss of greater than 15 dB and out-of-band rejection of greater than 30 dB. The simulated and measured results are in good agreement. The proposed filter is very attractive for use in modern wireless systems which require bandpass filters having compact size, low insertion loss, high selectivity, and good out-of-band rejection.

Made available in DSpace on 2014-06-11T19:31:40Z (GMT). No. of bitstreams: 0 Previous issue date: 2001Bitstream added on 2014-06-13T18:42:36Z : No. of bitstreams: 1 aquino_frq_dr_guara.pdf: 1771311 bytes, checksum: ae592e11d2c944ae8a940fa51ec488cf (MD5) / Neste trabalho estuda-se a convecção natural laminar em regimes permanente e transiente em cavidades triangulares isósceles. Para a determinação das distribuições de velocidades e temperaturas são utilizadas as equações de conservação da massa, quantidade de movimento e de energia, com a aproximação de Boussinesq. A solução do sistema de equações diferenciais é feita através de um método de volumes finitos utilizando o esquema de discretização Power-Law proposto por Patankar e o procedimento SIMPLE é empregado para obtenção de equações de correção de pressões. Os sistemas de equações algébricas encontrados são solucionados numericamente por um algoritmo line-by-line, que é uma combinação de um método direto TDMA para problemas unidimensionais com o método iterativo de Gauss-Siedel. Foram obtidas soluções para diversas combinações de condições de contorno de temperaturas conhecidas e paredes adiabáticas e as comparações com os resultados existentes na literatura comprovam a confiabilidade do modelo e do código computacional desenvolvidos. São apresentadas ainda soluções quando se consideram fluxos de calor constantes e variáveis com o tempo em uma das superfícies da cavidade. A influência do valor do número de Grashof e da razão de aspecto da cavidade é também discutida. / In this work the laminar natural convection in enclosures of isosceles triangular shape is studied. Both the steady state and the transient regimes are included. The mass conservation, momentum and energy equations are used for the velocity and temperature profiles determination. The Boussinesq approach is also considered. The solution of the differential equation set is performed by using a finite volume method. The discretization scheme chosen was the Patankar's Power-Law Scheme and the SIMPLE algorithm is adopted to get a pressure correction equation. The resultant algebraic equations are solved by a line-by-line procedure that is a combination of a direct method (TDMA) and an iterative Gauss-Siedel method. The solution for some different boundary condition, involving prescribed temperatures and adiabatic walls, were obtained and were compared with the literature results. The good agreement between them validates the developed mathematical model and computational code. Here it is also presented solutions for the case of a constant or time dependent heat flux imposed over one of the sides of the enclosure. The influence of the Grashof number and the enclosure aspect ratio is discussed.

Tese (doutorado)—Universidade de Brasília, Instituto de Artes, Pós-Graduação em Arte, 2013. / Submitted by Albânia Cézar de Melo (albania@bce.unb.br) on 2014-08-04T15:57:11Z No. of bitstreams: 1 2013_SheilaMariaCondeRochaCampello.pdf: 82204324 bytes, checksum: 4b39599b57fb72770f3b12c210a394c0 (MD5) / Approved for entry into archive by Guimaraes Jacqueline(jacqueline.guimaraes@bce.unb.br) on 2014-08-08T11:28:39Z (GMT) No. of bitstreams: 1 2013_SheilaMariaCondeRochaCampello.pdf: 82204324 bytes, checksum: 4b39599b57fb72770f3b12c210a394c0 (MD5) / Made available in DSpace on 2014-08-08T11:28:39Z (GMT). No. of bitstreams: 1 2013_SheilaMariaCondeRochaCampello.pdf: 82204324 bytes, checksum: 4b39599b57fb72770f3b12c210a394c0 (MD5) / O termo Arteduca é um neologismo que resulta da junção dos termos arte e educação. A contribuição desta tese no campo da educação a distancia em arte e tecnologia está na apresentação da proposta metodológica resultante do planejamento e oferta do curso de especialização Arteduca: arte, educação e tecnologias contemporâneas. Denominamos, no texto da tese, essa nova modalidade de ensino e aprendizagem como cibereducação em arte. Os fundamentos metodológicos recorrem à teoria autopoiética de Humberto Maturana e Francisco Varela; aos princípios da transdisciplinaridade; à teoria da complexidade, apresentada por Edgar Morin; à Abordagem Triangular, sistematizada por Ana Mae Barbosa e enriquecida por teorias estéticas aplicadas à interpretação da imagem; ao construcionismo aplicado ao uso pedagógico dos computadores; à etnografia aplicada aos projetos de ensino e aprendizagem, fundamentada em teóricos do campo da Antropologia Cultural e em experiências desenvolvidas em parceria com Leda Guimarães, no contexto do curso Arteduca e da Licenciatura em Artes Visuais, do Programa Pró-licenciatura. A tese é prática-teórica e apresenta resultados consistentes do trabalho iniciado em 2003. ______________________________________________________________________________ ABSTRACT / The term Arteduca is a neologism that results from the combination of the terms art and education. This thesis proposes a methodological approach to the Arteduca: Art, Education and Contemporary Technologies specialization course, that contributes to the improvement for the field of art and technology online education. We denominate, in the thesis text, this new modality of teaching and learning as cybereducation in art. The methodological foundation is based on Humberto Maturana and Francisco Varela’s autopoietic theory; in the principles of the transdisciplinar approach; in the complexity theory, presented by Edgar Morin; in the Triangular Approach, systematized by Ana Mae Barbosa and enriched with aesthetic theories applied to the image interpretation; in the constructionism applied to the educational use of computers; as well as in the ethnography applied to teaching and learning projects, reasoned in theorists from the Cultural Antropology field and in experiments developed in partnership with Leda Guimarães, in the Arteduca course and in the degree in Visual Arts from the Pró-licenciatura program. This thesis is a result of the practical and theoretical research and presents consistent results of the work initiated in 2003.

The series of experimental studies to be described has been carried out in order to determine the feasibility of using corner reflectors as laboratory standards for model cross-section measurements.