On 1 July 1997, sovereignty of Hong Kong was transferred to the People's Republic of China , ending over a one and half century of British rule. The cultural identities of people in Hong Kong have been an important research topic in the study, past research has generally focused on the dichotomy of a "Hongkongese" vs. a "Chinese" identity. But in this paper, I try to introduce Danny Yung¡¦s Chinese concept to explain a "Hongkongese" identity. Danny Yung is one of the most dynamic cultural figures in Hong Kong. As a director, producer, artist and curator he sets the cultural agenda not only in Hong Kong, but in many Asian countries, US and Europe. His works are experimenting and based on critic comments to daily media and culture politics in Asia. In 1982, he founded the art association ¡¬Zuni Icosahedron¡¬, which works with performing art, press events, art education and youth festivals nationally and internationally. This research discussed Danny Yung how to help "Hongkongese" get rid of the shadow of Britain and China ,and promote "Hongkongese" have a new identity.

The Mullins-Sekerka problem, also called two-sided Hele-Shaw flow, arises in modeling a binary material with two stable concentration phases. A coarsening process occurs, and large particles grow while smaller particles eventually dissolve. Single particles become spherical. This process is described by evolving harmonic functions within the two phases with the moving interface driven by the jump in the normal derivatives of the harmonic functions at the interface. The harmonic functions are continuous across the interface, taking on values equal to the mean curvature of the interface. This dissertation reformulates the three-dimensional problem as one on the two-dimensional interface by using boundary integrals. A semi-implicit scheme to solve the free boundary problem numerically is implemented. Numerical analysis tasks include discretizing surfaces, overcoming node bunching, and dealing with topology change in a toroidal particle. A particle (node)-cluster technique is developed with the aim of alleviating excessive run time caused by filling the dense matrix used in solving a system of linear equations.

This research investigated the tribological performance of a composite material, formed from an ultra high molecular weight polyethylene (UHMWPE) matrix and quasicrystalline Al-Cu-Fe alloy powders. An evaluation was conducted for the microstructure, material properties, and tribological performance of quasicrystalline materials formed from Al-Cu-Fe alloys. Arc melting was used as the fabrication technique for these alloys, and some samples were additionally heat treated in an argon environment. Vickers microhardness testing was done to make comparisons to wear rate behavior of the various alloys. Tribological studies were conducted using a linear pinon- desk configuration to evaluate friction and wear. Research indicated the annealed samples of Al-Cu-Fe that formed icosahedral quasicrystalline phases, where the quasicrystalline phase was most dominant of the observed alloys, displayed the greatest wear resistance and hardness. Abrasive wear was observed in each of the samples, as the brittle, hard nature of the quasicrystalline phase would not allow for the ductile adhesion. The addition of small amounts of Al-Cu-Fe quasicrystalline particles, crushed and pulverized from the arc-melted ingots, reduced the coefficient of friction and wear rate of UHMWPE, when added to the polymer.

Made available in DSpace on 2016-04-27T16:57:20Z (GMT). No. of bitstreams: 1 Jose Fernando Possani.pdf: 1442010 bytes, checksum: a22b579a653f723cca0d58a6735aee95 (MD5) Previous issue date: 2012-10-16 / Our study aims to investigate the appropriation of calculating the volume of the regular icosahedron, by the 3rd year high school students. The calculation is based on a sequence of activities measured using Cabri 3D. Through this research we seek to answer the following research question: how does a didactic sequence that involves dynamic geometry influence the processes of teaching and learning in the volume of regular Icosahedron? To answer this question, we applied this sequence of activities to four high school students. Our research is qualitative and relies on the assumptions of Didactic Engineering, the Theory of Didactical Situations. This Theory highlights the role of the teacher, the student and the environment in which processes take place on teaching and learning - and the theory of Records Semiotic Representation, more specifically, the seizures of a different figure. When analyzing the development of the subjects during the sequence of activities it s possible to see that they understand how to calculate the volume of the regular icosahedron / Nosso estudo tem por objetivo investigar a apropriação do cálculo da medida do volume do icosaedro regular, por alunos do 3º ano do Ensino Médio, a partir de uma sequência de atividades mediadas pelo uso do software Cabri 3D. Com a pesquisa, procuramos responder a seguinte questão de pesquisa: De que forma uma sequência didática que envolve a Geometria Dinâmica pode interferir nos processos de ensino e aprendizagem de volume do Icosaedro regular? Para responder essa questão de pesquisa, aplicamos, junto a quatro alunos do Ensino Médio, uma sequência de atividades. Nossa investigação é de cunho qualitativo e apoiou-se nos pressupostos da Engenharia Didática, a Teoria das Situações Didáticas, as quais valorizam o papel do professor, do aluno e do meio em que ocorrem os processos de ensino e de aprendizagem e a teoria dos Registros de Representação Semiótica, mais especificamente, nas diferentes apreensões de uma figura. Ao analisar o desenvolvimento dos sujeitos durante as atividades da sequência foi possível perceber que eles compreendem como calcular o volume do icosaedro regular

The geometrical structure of a tree can consist of thousands, even millions, of branches, twigs and leaves in complex arrangements. The structure contains a lot of useful information and can be used for example to assess a tree's health or calculate parameters such as total wood volume or branch size distribution. Because of the complexity, capturing the structure of an entire tree used to be nearly impossible, but the increased availability and quality of particularly digital cameras and Light Detection and Ranging (LIDAR) instruments is making it increasingly possible. A set of digital images of a tree, or a point cloud of a tree from a LIDAR scan, contains a lot of data, but the information about the tree structure has to be extracted from this data through analysis. This work presents a method of reconstructing 3D models of trees from point clouds. The model is constructed from cylindrical segments which are added one by one. Bayesian inference is used to determine how to optimize the parameters of model segment candidates and whether or not to accept them as part of the model. A Hough transform for finding cylinders in point clouds is presented, and used as a heuristic to guide the proposals of model segment candidates. Previous related works have mainly focused on high density point clouds of sparse trees, whereas the objective of this work was to analyze low resolution point clouds of dense almond trees. The method is evaluated on artificial and real datasets and works rather well on high quality data, but performs poorly on low resolution data with gaps and occlusions.