Σκοπός της διπλωματικής αυτής εργασίας είναι η μελέτη ρομποτικής διάταξης οστεογένεσης και πιο συγκεκριμένα η μελέτης της δυναμικής και ο έλεγχος αυτής. Πιο αναλυτικά, τα κεφάλαια που ακολουθούν πραγματεύονται τα ακόλουθα: θα παρουσιαστεί γενικά ο μηχανισμός της οστεογένεσης από ιατρικής πλευράς, καθώς επίσης και οι διάφορες διατάξεις με τις οποίες πραγματοποιείται η διατατική οστεογένεση. Στη συνέχεια θα παρουσιάσουμε τις κινηματικές και δυναμικές εξισώσεις της πλατφόρμας Stewart. Το τελευταίο μέρος αποτελεί και το πειραματικό μέρος της παρούσας εργασίας δηλαδή τον έλεγχο της συγκεκριμένης διάταξης μέσω του SimMechanics toolbox του πακέτου MatLab. Στο παράρτημα παρουσιάζονται τα αποτελέσματα των πειραμάτων με μορφή διαγραμμάτων. / Distraction osteogenesis and simulation of stewart platform on Simulink.

MACEDO, Darilene Maria Ribeiro. Resgatando alguns teoremas clássicos da geometria plana. 2014. 57 f. Dissertação (Mestrado em Matemática em Rede Nacional) - Centro de Ciências, Universidade Federal do Ceará, Juazeiro do Norte, 2014. / Submitted by Erivan Almeida (eneiro@bol.com.br) on 2014-09-01T20:23:25Z No. of bitstreams: 1 2014_dis_dmrmacedo.pdf: 635124 bytes, checksum: 5ff863ef2c146df03aaaf32db393c170 (MD5) / Approved for entry into archive by Rocilda Sales(rocilda@ufc.br) on 2014-09-02T15:59:51Z (GMT) No. of bitstreams: 1 2014_dis_dmrmacedo.pdf: 635124 bytes, checksum: 5ff863ef2c146df03aaaf32db393c170 (MD5) / Made available in DSpace on 2014-09-02T15:59:51Z (GMT). No. of bitstreams: 1 2014_dis_dmrmacedo.pdf: 635124 bytes, checksum: 5ff863ef2c146df03aaaf32db393c170 (MD5) Previous issue date: 2014 / The study of geometry provides a rich and attractive field of manipulatives, because geometry is present in the daily life of all people, sometimes explicitly and sometimes in a subtle way. We present, however, in this work, many situations that show that geometry goes much beyond mathematical equations. We intent to make a simple approach of some triangles-related theorems, focusing on Stewart’s, Ceva’s, Menelaus’ and Napoleon’s, as well as on their detailed demonstrations in a comprehensive way. Having as one of the goals to make those more spread, in such a way that they can be used as complementary tools to help the learning of plane geometry. For even being such a great key to many questions’ solutions, they are not usually applied. Finally, we conclude this work with some applications, which will hopefully excite and whet the curiosity of the reader to search for more. / O estudo da Geometria possibilita um campo rico e atraente de manipulações, pois a Geometria está presente na vida cotidiana de todos os cidadãos, por vezes de forma explícita e por vezes de forma sutil. Apresentamos, porém, neste trabalho, diversas situações que mostram que a Geometria vai muito além de fórmulas. Fizemos uma abordagem simples de alguns teoremas da Geometria plana relacionados aos triângulos focando nos teoremas de Stewart, Ceva, Menelaus e Napoleão, bem como suas demonstrações detalhadas e didaticamente compreensíveis. Tendo como um dos objetivos torná-los mais divulgados, de modo que possam ser utilizados como ferramentas para complementarem e auxiliarem na aprendizagem da Geometria plana. Pois mesmo tendo grande papel na resolução de muitas questões, são pouco usados. E concluímos o nosso trabalho com algumas aplicações, inclusive de exames vestibulares, esperando que sirvam para despertar o interesse e aguçar a curiosidade do leitor para buscar aprofundar mais os conhecimentos nesta área.

The Stewart mining camp in northwestern British Columbia is abundantly mineralized with widely distributed, texturally and mineralogically varied, precious and base metal deposits. This report documents the geologic setting of the mining camp and the geologic features of the major mineral deposit types. The Stewart camp is underlain by a 5-kilometre-thick Upper Triassic to Lower Jurassic (Norian? to Toarcian) island arc complex of calc-alkaline basalts, andesites and dacites with interbedded sedimentary rocks. Coeval (211-189 Ma) hornblende granodiorite plutons intruded the arc at two to five kilometres depth. Rocks were deformed during mid-Cretaceous (110 ± 5 Ma) tectonism that produced north-northwest-trending folds, penetrative fabric and lower greenschist facies regional metamorphism (290°±20°C, 4.5 ±1.5 kb). Mid-Eocene (54.8-44.8 Ma) biotite granodiorite of the Coast Plutonic Complex intruded the deformed Mesozoic arc complex. Two mineralizing events formed over 200 mineral occurrences in the district. These two metallogenic epochs were brief (< 5 million years), regional-scale phenomena characterized by different base and precious metal suites. The Early Jurassic ore-forming episode produced Au and Au-Ag-Zn-Pb-Cu deposits. The mid-Eocene episode produced Ag-Pb-Zn ± W ± Mo deposits. Early Jurassic deposits have a characteristic lead isotope signature (²⁰⁶Pb/²⁰⁴Pb = 18.816; ²⁰⁷Pb/²⁰⁴Pb = 15.617) and include gold-pyrrhotite veins, gold-silver-base metal veins, and stratabound pyritic dacites. All Early Jurassic mineral occurrences are late- to post-intrusive deposits that were emplaced in andesitic to dacitic host rocks at the close of volcanic activity, about 190-185 million years ago. Transitional gold-pyrrhotite veins (Scottie Gold mine) formed in en echelon tension gashes developed in country rock around Early Jurassic plutons during late magma movement. Epithermal gold-silver-base metal veins and breccia veins (Big Missouri and Silbak Premier mines) were deposited along shallower sub-volcanic faults and in hydrothermal breccia zones formed along dyke contacts. Stratabound pyritic dacite tuffs (Mount Dilworth and Iron Cap prospects) formed where venting fumarolic fluids and hotspring pools deposited abundant fine pyrite in local areas on a cooling ignimbrite sheet. Eocene deposits also have a characteristic lead isotope signature (²⁰⁶Pb/²⁰⁴Pb = 19.147; ²⁰⁷Pb/²⁰⁴Pd = 15.627) and include silver-rich galena-sphalerite veins, gold-silver skarns and, beyond the study area, porphyry molybdenum deposits. These mineral occurrences are related to Middle Eocene plutons of the Coast Plutonic Complex. All are late- to post-intrusive deposits emplaced about 50-45 million years ago. Mesothermal silver-lead-zinc veins (Prosperity/Porter Idaho and Riverside mines) were deposited in brittle zones along major fault structures. Skarns (Oral M and Red Reef prospects) developed where plutons cut limestone or limy siltstone units within minor turbidite sequences. Major porphyry molybdenum deposits (Kitsault mine and Ajax) developed where mid-Eocene stocks were emplaced in thick turbidite sequences. Diagnostic features such as lead isotope ratios, stratigraphic and plutonic associations, alteration assemblages, sulphide mineralogy and textures, and precious metal ratios allow discrimination amoung these different deposit types. Using these criteria, the most prospective areas for each deposit type have been targetted for exploration. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

L'objectif de ce travail est de construire une machine d'essai pour la prothèse. La machine doit être capable de reproduire les mêmes conditions dynamiques et cinématiques appliquées sur la prothèse pendant l'utilisation normale.Le nombre d'amputation et les causes d'amputation ont été recueillis. Différents types de prothèses ont été classés selon la prothèse de jambe par hauteur d'amputation, prothèse passive et active, différenciées par la nature de leur actionneur. La plupart des machines d'essai pour la prothèse ont été étudiées à partir de la prospective technologique et capacitaire. Déterminer toutes les limitations de la plupart des machines d'essai existantes, et les besoins de développer une nouvelle machine pour remplir complètement ces besoins ont été développés.Ensuite, nous avons étudié et analysé la dynamique de la marche et de la course humaines. Les équations du mouvement en prenant en considération les masses et les moments d'inertie des segments squelettiques. La plupart des paramètres de la démarche ont été extraits. En conclusion, nous avons les exigences cinématiques du centre de gravité humain pour générer 6 DOF que la machine d'essai devrait effectuer pour imiter la démarche humaine normale et courir.Trois conceptions ont été proposées pour implanter la machine d'essai; Bras de robot articulé, manipulateur cartésien et Stewart Platform (SP). Après la mise en œuvre des trois solutions, nous avons trouvé la solution la plus appropriée est le SP attaché avec une hanche active artificielle. Nous avons choisi la puissance hydraulique car c'est la technique d'actionnement la plus appropriée pour notre solution, connaissant les forces d'actionnement requises.Pour aider à contrôler le mouvement de SP, une nouvelle solution de modèle géométrique direct pour la planeuse et la plate-forme Stewart 6-6 a été développée en utilisant les capteurs rotatifs au lieu de capteurs de revêtement comme voulu pour les actionneurs hydrauliques. L'analyse de sensibilité a été étudiée pour cette solution, et un calcul analytique pour le calcul de l'espace de travail a également été développé.La conclusion de cette machine d'essai est que nous pouvons créer toute la dynamique du corps humain, c'est-à-dire marcher ou courir ou monter et descendre des escaliers. La solution développée peut porter des procédures d'essai pour la prothèse passive ou active. / The objective of this work is to build a testing machine for prosthesis. The machine should be able to reproduce the same dynamic and kinematics conditions applied on the prosthesis during the normal use.Numbers of amputation, and causes of amputation were collected. Different types of prosthesis were classified according to the leg prosthesis per amputation height, passive and active prosthesis, differentiated by the nature of their actuator. Most of the testing machine for the prosthesis were studied form the technological and capability prospective. Determining all the limitations of most of existing testing machines, and the needs to develop a new machine to full fill these needs were developed.Then we studied and analyzed the dynamics of the human gait and run. The equations of motion by taking into consideration the masses and moments of inertia of skeletal segments. Most of the parameters of gait were extracted. In conclusion, we have the kinematic requirements of the human center of gravity to generate 6 DOF that the testing machine should carry out to emulate the normal human gait and run.Three designs were proposed to implement the testing machine; Articulated robot arm, Cartesian manipulator, and Stewart Platform (SP). After implementing the three solutions we found the most suitable solution is the SP attached with it an artificial active hip. We have chosen the hydraulic power as it is the most suitable actuation technique for our solution knowing the required actuation forces.To help in controlling the SP motion, a novel Closed-form solution of direct Geometric model for planer and 6-6 Stewart Platform using the rotary sensors instead of liner sensors as wanted to the hydraulic actuators was developed. Sensitivity analysis was studied for that solution, and analytical calculation for computing the workspace was also developed.The conclusion from this testing machine is that we can create all the dynamics of the human body, i.e. walking or running or going up and down stairs. The developed solution can carry testing procedures for either passive or active prothesis.

The Daily Show with Jon Stewart uses humor to explore, analyze, and criticize current media and political trends, politicians, and campaigns. Reappropriation uses video as an argument against the original producers of that content, one of the tools used to highlight the problems with the political and current media coverage. The effectiveness of using reappropriated video is analyzed through a rhetorical analysis, combining argumentative analysis and functional analysis. Through this analysis a structure is developed for three types of arguments used by The Daily Show: highlighting absurdity, the political fact check and highlighting contradictions, and exposing social and media patterns. The analysis explores the strengths and weaknesses of each type of reappropriation, and the structural form of the argument.

No description available.

En metastudie som använder sig av en specifikt anpassad tolkning av grounded theory för att undersöka The Daily Shows satiriska kritik och funktion, samt hur detta relaterar till det sociologiska perspektivet. Fynden visar på en problematik som väl överrensstämmer med mer allmänna sociologiska teorier hos Foucault, Bourdieu och Habermas. Satiren visar sig utöva en serie meningsfulla funktioner som har potential att verka som en populistisk samhällskritik med stort inflytande. Satiren visar sig dock inte vara en problemfri diskurs och ett antal problem identifieras som behöver adresseras för att diskursen ska kunna åberopa någon form av legitimitet. / A meta-study which uses a specifically tailored interpretation of grounded theory to explore The Daily Shows satiric critique and function, as well as how it relates to the sociological perspective. The findings show a complex of problems that well corresponds to the more general sociological theories of Foucault, Bourdieu and Habermas. The satire is found to perform a series of meaningful functions with potential to act as a populist form of social criticism with a large influence. However, satire is also found to be a problematic discourse and a series of problems are identified that needs to be addressed for the discourse to invoke any form of legitimacy.

No description available.

Zugl.: Trier, Univ., Habil.-Schr., 2008

Marine reserves have increasingly been recognised for their potential to address the pervasive problem of unsustainable harvest of fisheries worldwide. Biologists advocate the benefits of increased spawning biomass, larger modal sizes and greater densities of fish within marine reserves, and the possibility of spillover to adjacent fishable areas. Bioeconomic studies, however, find that pay-offs from stand-alone marine reserves rarely compete with sustainable yield management schemes, but that they can be beneficial when stocks are heavily exploited. Most of these bioeconomic models are analytical and deterministic in nature, and therefore ignore the redistribution of effort in response to closure and the inherent uncertainty of the marine environment. We present a bioeconomic analysis of a network of no-take areas around Stewart Island in New Zealand applied to the shellfish species paua (abalone) that incorporates both predicted redistribution and reduction in effort, as well as stochastic recruitment. A nested logit model is applied to spatially recorded catch and effort data by the Ministry of Fisheries between 1998 and 2003 to capture the two level decision-making process of divers. On any given day, divers decide whether to go diving at all, and if so, which of the 16 statistical areas around Stewart Island to visit. Weather conditions, spatially varying levels of catch per unit of effort and distance are used as explanatory variables to select areas for closure according to the �least economic impact� in terms of loss of diving trips. An age-structured biological model is developed with parameters specifically applied to paua stocks around Stewart Island. Virgin paua biomass as of 1974 is estimated on the basis of growth, survival, post-larval recruitment and egg production in the absence of fishing. Historic catch rates are then applied to find overall and area-specific levels of exploitation rates, spawning biomass, egg production, legal biomass and numbers of paua. In a final step, the economic model is linked to the biological model to simulate the imposition of no-take areas when taking account of the initial disproportional shift of harvest to fished areas in the first year, and the increase in overall pressure on legal biomass in the years thereafter. We contribute to the marine reserve debate by showing that in the very long run, the overall yield under closure of a relatively small area approaches and even slightly surpasses the yield under no closure for an assumed spillover gradient of 40% despite the redistribution of effort. The most important benefits of marine reserves emerge when stochastic recruitment is included in the recruitment function. In practice, predictions about the stock status and the impact of different harvest levels become much more difficult when acknowledging the inherent variability of the marine environment. The likelihood of stock collapse depends on the assumed value of two recruitment parameters, which highlights the effects of parameter uncertainty and emphasizes the role of marine reserves for population persistence. We also show that under uncertainty average yields under a management regime of a network of no-take areas in addition to the quota system can equal yields under no closure for an assumed spillover gradient of 40%, despite the increased pressure on areas adjacent to the closed areas. Our findings have significant implications for the management of the paua fishery at Stewart Island. For a heterogeneously abundant species, such as paua, spatial management in addition to quota limits could be vital in ensuring the long-term sustainability of the fishery given the inherent variability of the marine environment.