Dissertations / Theses on the topic 'Biomorphes'
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Othman, Gaznag Sedeeq. "TOWARD A NEW KURDISH CRITICAL BIOMORPHIC REGIONALISM: A DESIGN FOR NATIONAL TOURISM CENTER OF KURDISTAN IN CHICAGO, IL." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/theses/2254.
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The major purpose of this thesis is to present a proposal for a Kurdish Tourism Center complex designed on the present site of two of Chicago’s most famous parks. These parks are the Washington Park and the Jackson Park located near the center of this famous city. Moreover, this thesis attempts to offer some new ideas about Kurdish architecture which blend ideas of bio morphism and critical regionalism into the overall design of Center Complex. Thus, much of this thesis offers a discussion of issues related to trying to define Kurdish identity in the 21st century and seeks to include these ideas into the architectural designs of the projects. For example, Kurdish people, by and large, love and treasure the many famous Kurdish poets who have written throughout the centuries until the present day. Overall, Kurdish people love the outdoors and nature. They love flowing water falls and often escape to the mountains with their families to enjoy picnics and have celebrations. Moreover, Kurdish people love music and they love to dance. These are just some of the things that have been translated from ideas into architectural designs for this project. In addition, the Kurds are one of the largest populations of “ethnic” people’s in the world that do not have their own recognized country or nation. Consequently, much of Kurdish identity is about this struggle for freedom and autonomy and the desire to have a country they can call their own. These themes are explored in both the architectural designs for this project and in the accompanying “programing” that might be presented and housed at a Kurdish Tourism/Cultural Center Complex in Chicago, Illinois.
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Jacquemot, Pierre. "Fossilisation expérimentale du monde à ARN." Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS397.
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L’enregistrement fossile est l’unique témoin direct de l’histoire du vivant. Actuellement, ses toutes premières étapes situées autour de 4 Ga sont très mal connues notamment à cause de la rareté des roches Archéennes et Hadéennes et de la très forte dégradation des biosignatures au cours des temps géologiques. Plusieurs scénarios comme celui d’un « monde à ARN » ont été élaborés pour décrire l’émergence de la vie mais il n’en existe pour l’heure aucune preuve dans l’enregistrement fossile car on ne sait pas quelles traces ces formes de vie primitives ont pu laisser. Au cours de cette thèse, nous développons une approche expérimentale afin d’identifier les traces d’un « monde à ARN » susceptibles d’être conservées au cours de la diagénèse. Cette approche consiste à faire subir en laboratoire des processus de diagénèse à des molécules caractéristiques du vivant primitif en présence de minéraux modèles de la surface de la Terre Hadéenne. De l’ARN, une des premières biomolécules à émerger dans l’hypothèse du « monde à ARN » a donc été placé en conditions de diagénèse durant 20 jours à 200°C en présence de silice sous forme de gel (précurseurs des cherts), de quartz ou de silice fumée. Des expériences similaires ont été conduites en présence de gels de composition montmorillonite (analogues des premières phases d’altération) à différentes quantités d’eau. Les résidus obtenus ont été analysés par des techniques permettant de caractériser leur contenu minéral et organique. Ceci a permis de documenter les caractéristiques attendues pour des traces fossiles des premières formes de vie issues du monde à ARN et de proposer des hypothèses sur les mécanismes de leur formation et les paramètres déterminants pour leur préservationFossil record is the only immediate proof of the history of life. Currently, its first steps around 4 Ga are very poorly known particularly because of the scarcity of Hadean and Archean rocks and the very strong degradation of biosignatures throughout geological times. Several scenarios such as the “RNA world” have been developed to describe the emergence of life but no proof of that exists for now into the fossil record because one does not know what traces these primitive forms of life could leave. During this phD thesis, we developed an experimental approach to identify the traces of an “RNA world” which could be preserved during diagenesis. This approach consists in experimentally submitting typical molecules of primitive life to diagenetic processes in presence of model minerals of the surface of the Hadean Earth. RNA, one of the first biomolecules emerging in the “RNA world” hypothesis, has been placed in diagenetic conditions during 20 days at 200°C in presence of silica as gel (cherts precursor), as quartz or as fumed silica. Similar experiments have been performed in presence of gels of montmorillonite composition at different amounts of water (similar to the first alteration phases). The obtained residues have been further analyzed by techniques allowing the characterization of their mineral and organic content. This allowed to document the expected characteristics of fossil traces of the first forms of life coming from the “RNA world” and to provide hypotheses on their formation mechanisms and the key parameters for their preservation
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Mundy, Jennifer. "Biomorphism." Thesis, Courtauld Institute of Art (University of London), 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319291.
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Osborne, Ryan T. "Biomorphia." Kent State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=kent1397772443.
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Lehtola, Amanda M. "Atmospheric Biomorphism." Kent State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=kent1208803878.
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Schmirler, Martina [Verfasser]. "Herstellung poröser Kohlenstoffe aus biomorphen Karbidkeramiken / Martina Schmirler." Aachen : Shaker, 2010. http://d-nb.info/1081884967/34.
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van, der Vyver Johannes Petrus. "A biomorphic electronic Hopf cochlea /." Zürich : ETH, 2006. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16941.
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Redolfi, Bristol Davide <1996>. "Biomorphous porous oxide ceramics, A review." Master's Degree Thesis, Università Ca' Foscari Venezia, 2020. http://hdl.handle.net/10579/18271.
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Porous ceramics are a class of materials which have found a large number of applications in various industrial fields. Thanks to their interesting physico-chemical properties, these compounds have been exploited both in environmental and energy areas, demonstrating optimal performances. The development of innovative and affordable manufacturing pathways to produce highly porous ceramics is therefore always required.
In recent years, researchers’ attention has been focused on the conversion of lignocellulosic biomass into porous carbide or oxide ceramics, also named biomorphous ceramics. The peculiar internal structure of lignocellulosic materials could indeed represent the perfect template for the formation of promising hierarchically porous ceramics, with unique characteristics that could not be obtained throughout other synthetic methods. Moreover, these lignocellulosic materials such as wood, fibers, pollen grains and leaves can be easily collected, and have a low market cost or are waste materials and byproducts, making the entire process more eco-friendly and less expensive. An interesting example of a wood biomass template that combines peculiar internal microstructure with economic and environmental sustainability is cork. The microstructure of the cork wood is composed of numerous hexagonal honeycomb cells which make it an optimal thermal, acoustic and vibrational insulator. Furthermore, cork is periodically harvested from the tree without harming the plant, making cork oak one of the best examples of a working tree being used for carbon storage.
Nowadays, literature is mainly focused on the production of biomorphous carbide ceramics, while less attention has been paid to the formation of biomorphous oxide ceramics, with no review totally dedicated to their description. In this thesis, the state of the art of the hierarchically porous oxide ceramics derived from lignocellulosic materials as starting templates will be discussed. The thesis is intended to provide a comprehensive picture of the accessible production procedures, together with a presentation of the best performing practical applications of the various oxide ceramics. In addition, new possible investigation areas will be considered, so as to open up new interesting routes to explore.
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Chen, Xue. "High Temperature Biomorphic Templates from Lignocellulosic Fibers." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1285092271.
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Mikhalsky, Maxim. "Efficient biomorphic vision for autonomous mobile robots." Thesis, Queensland University of Technology, 2006. https://eprints.qut.edu.au/16206/1/Maxim_Mikhalsky_Thesis.pdf.
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Autonomy is the most enabling and the least developed robot capability. A mobile robot is
autonomous if capable of independently attaining its objectives in unpredictable environment.
This requires interaction with the environment by sensing, assessing, and responding to events.
Such interaction has not been achieved. The core problem consists in limited understanding of
robot autonomy and its aspects, and is exacerbated by the limited resources available in a small
autonomous mobile robot such as energy, information, and space.
This thesis describes an efficient biomorphic visual capability that can provide purposeful
interaction with environment for a small autonomous mobile robot. The method used for
achieving this capability comprises synthesis of an integral paradigm of a purposeful autonomous
mobile robot, formulation of requirements for the visual capability, and development of efficient
algorithmic and technological solutions. The paradigm is a product of analysis of fundamental
aspects of the problem, and the insights found in inherently autonomous biological organisms.
Based on this paradigm, analysis of the biological vision and the available technological basis,
and the state-of-the-art in vision algorithms, the requirements were formulated for a biomorphic
visual capability that provides the situation awareness capability for a small autonomous mobile
robot. The developed visual capability is comprised of a sensory and processing architecture, an integral set of motion vision algorithms, and a method for visual ranging of still objects that is based on them. These vision algorithms provide motion detection, fixation, and tracking functionality with low latency and computational complexity. High temporal resolution of CMOS imagers is exploited for reducing the logical complexity of image analysis, and consequently the computational complexity of the algorithms. The structure of the developed algorithms conforms to the arithmetic and memory resources available in a system on a programmable chip (SoPC), which allows complete confinement of the high-bandwidth datapath within a SoPC device and therefore high-speed operation by design. The algorithms proved to be functional, which validates the developed visual capability. The experiments confirm that high temporal resolution
imaging simplifies image motion structure, and ultimately the design of the robot vision system.
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Mikhalsky, Maxim. "Efficient biomorphic vision for autonomous mobile robots." Queensland University of Technology, 2006. http://eprints.qut.edu.au/16206/.
Full textAbstract:
Autonomy is the most enabling and the least developed robot capability. A mobile robot is autonomous if capable of independently attaining its objectives in unpredictable environment. This requires interaction with the environment by sensing, assessing, and responding to events. Such interaction has not been achieved. The core problem consists in limited understanding of robot autonomy and its aspects, and is exacerbated by the limited resources available in a small autonomous mobile robot such as energy, information, and space. This thesis describes an efficient biomorphic visual capability that can provide purposeful interaction with environment for a small autonomous mobile robot. The method used for achieving this capability comprises synthesis of an integral paradigm of a purposeful autonomous mobile robot, formulation of requirements for the visual capability, and development of efficient algorithmic and technological solutions. The paradigm is a product of analysis of fundamental aspects of the problem, and the insights found in inherently autonomous biological organisms. Based on this paradigm, analysis of the biological vision and the available technological basis, and the state-of-the-art in vision algorithms, the requirements were formulated for a biomorphic visual capability that provides the situation awareness capability for a small autonomous mobile robot. The developed visual capability is comprised of a sensory and processing architecture, an integral set of motion vision algorithms, and a method for visual ranging of still objects that is based on them. These vision algorithms provide motion detection, fixation, and tracking functionality with low latency and computational complexity. High temporal resolution of CMOS imagers is exploited for reducing the logical complexity of image analysis, and consequently the computational complexity of the algorithms. The structure of the developed algorithms conforms to the arithmetic and memory resources available in a system on a programmable chip (SoPC), which allows complete confinement of the high-bandwidth datapath within a SoPC device and therefore high-speed operation by design. The algorithms proved to be functional, which validates the developed visual capability. The experiments confirm that high temporal resolution imaging simplifies image motion structure, and ultimately the design of the robot vision system.
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Hudson, Tina Ann. "A biomorphic integrated-circuit implementation of muscular contraction." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/14976.
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Howell, Audrey. "The Biomorphic Grotesque in Modernist and Contemporary Painting." Scholarship @ Claremont, 2014. http://scholarship.claremont.edu/scripps_theses/327.
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This paper looks at the concepts of the biomorphic and grotesque in art from the start of the 20th century to the present with a focus on painting and drawing. Included in the discussion of the grotesque throughout history are the works of Dadaist Otto Dix, painter Georg Baselitz, and feminist artists Judy Chicago, Hannah Wilke, and Ana Mendieta. Each used grotesque imagery to comment or react to a larger sociopolitical issue. Biomorphic artworks from the 20th century are mentioned as well, with specific examples of work by Lee Krasner, Willem DeKooning, and Hans Bellmer. These artists together start to illustrate the ways biomorphic and grotesque imagery can be used to explore physical gesture, inspire a visceral reaction in the viewer, and make societal critique. These themes are currently being explored by contemporary artists Jenny Saville, Wangechi Mutu, Inka Essenhigh, Cecliy Brown, Elizabeth Murray, and Maria Lassnig, each of whom is discussed in detail. Their work explores the boundary space between the body and hybridity, impurity, or abstraction, each in their own way. Following this discussion the author’s own paintings and drawings are mentioned, including dialogue detailing the thought process behind each one. Photographs of these works are included.
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Bragg, Julian Alexander. "A biomorphic analog VLSI implementation of a mammalian motor unit." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/20693.
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Alsalloum, Abdullah Yousef. "Optimizing the synthesis process of wood-derived biomorphic silicon carbide." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111340.
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Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 41-46).
Biomorphic silicon carbide, a porous, light and high strength ceramic typically derived from natural wood, has great potential in high temperature and structural applications. Over the past several years, researchers have developed three main routes to fabricating biomorphic SiC: reactive infiltration of molten Si, chemical vapor infiltration of Si or SiO, and SiO₂-bearing solution infiltration. In this study, the latter was investigated and optimized. In addition, a novel synthesis technique, Si suspension infiltration, is proposed that overcomes the major issues present in the current methods. Four wood species (balsa, pine, maple and oak) offering a wide range of porosities were infiltrated with colloidal SiO₂ under varying pressure conditions, and the corresponding weight gains were recorded and studied. The samples were then fired at 1600 °C for 2h under argon flow, and examined via X-ray diffraction (XRD), scanning electron microscopy (SEM) and compression testing. It was found that applying pressure or vacuum produced more effective SiO₂ weight gains. Pine showed superior absorption to other types with its maximum obtained value achieved under vacuum followed by pressure. The starting concentration of SiO₂ solution proved to be crucial in controlling the final mechanical properties of the specimens. XRD analysis revealed that the resulting samples consisted of nearly pure SiC, and SEM images indicated that the initial structure of wood was retained. Due to the nature of the reactions involved with using SiO₂ as a-precursor, the produced specimens tend to be mechanically weak. The new synthesis approach involves the use of <10 pm sized particles of Si instead of nano-sized SiO₂ particles. Pine was selected to serve as the template for absorption, and after two infiltration treatments, the sample absorbed 55.6% of its weight, ~4% higher than its theoretical stoichiometric need, 51.3%. EDS analysis revealed that Si was able to spread homogenously, and XRD spectra confirmed the material identity to be composed of mainly pure SiC with minor trace metal contamination. Compression testing illustrated better mechanical properties of the Si prepared specimen, suggesting the potential of this method to replace existing techniques.
by Abdullah Yousef Alsalloum.
S.B.
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Zaghlool, Shaza Basyouni. "Using Artificial Life to Design Machine Learning Algorithms for Decoding Gene Expression Patterns from Images." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/32110.
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Understanding the relationship between gene expression and phenotype is important in many areas of biology and medicine. Current methods for measuring gene expression such as microarrays however are invasive, require biopsy, and expensive. These factors limit experiments to low rate temporal sampling of gene expression and prevent longitudinal studies within a single subject, reducing their statistical power. Thus methods for non-invasive measurements of gene expression are an important and current topic of research. An interesting approach (Segal et al, Nature Biotechnology 25 (6) 2007) to indirect measurements of gene expression has recently been reported that uses existing imaging techniques and machine learning to estimate a function mapping image features to gene expression patterns, providing an image-derived surrogate for gene expression. However, the design of machine learning methods for this purpose is hampered by the cost of training and validation.
My thesis shows that populations of artificial organisms simulating genetic variation can be used for designing machine learning approaches to decoding gene expression patterns from images. If analysis of these images proves successful, then this can be applied to real biomedical images reducing the limitations of invasive imaging. The results showed that the box counting dimension was a suitable feature extraction method yielding a classification rate of at least 90% for mutation rates up to 40%. Also, the box-counting dimension was robust in dealing with distorted images. The performance of the classifiers using the fractal dimension as features, actually, seemed more vulnerable to the mutation rate as opposed to the applied distortion level.Master of Science
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Sapei, Lanny. "Characterisation of silica in Equisetum hyemale and its transformation into biomorphous ceramics." Phd thesis, Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2007/1588/.
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Equisetum spp. (horsetail / “Schachtelhalm”) is the only surviving genus of the primitive Sphenopsids vascular plants which reached their zenith during the Carboniferous era. It is an herbaceous plant and is distinguished by jointed stems with fused whorl of nodal leaves. The plant has been used for scouring kitchen utensils and polishing wood during the past time due to its high silica encrustations in the epidermis. Equisetum hyemale (scouring rush) can accumulate silica up to 16% dry weight in its tissue, which makes this plant an interesting candidate as a renewable resource of silica for the synthesis of biomorphous ceramics. The thesis comprises a comprehensive experimental study of silica accumulations in E.hyemale using different characterisation techniques at all hierarchical levels. The obtained results shed light on the local distribution, chemical form, crystallinity, and nanostructure of biogenic silica in E.hyemale which were quite unclear until now. Furthermore, isolation of biogenic silica from E.hyemale to obtain high grade mesoporous silica with high purity is investigated. Finally, syntheses of silicon carbide (b-SiC) by a direct thermoconversion process of E.hyemale is attempted, which is a promising material for high performance ceramics.
It is found that silica is deposited continuously on the entire epidermal layer with the highest concentration on the knobs. The highest silicon content is at the knob tips (≈ 33%), followed by epidermal flank (≈ 17%), and inner lower knob (≈ 6%), whereas there is almost no silicon found in the interior parts. Raman spectroscopy reveals the presence of at least two silica modifications in E.hyemale. The first type is pure hydrated amorphous silica restricted to the knob tips. The second type is accumulated on the entire continuous outer layer adjacent to the epidermis cell walls. It is lacking silanol groups and is intimately associated with polysaccharides (cellulose, hemicellulose, pectin) and inorganic compounds. Silica deposited in E.hyemale is found to be mostly amorphous with almost negligible amounts of crystalline silica in the form of a-quartz (< 7%). The silica primary particles have a plate-like shape with a thickness of about 2 nm. Pure mesoporous amorphous silica with an open surface area up to 400 m2/g can be obtained from E.hyemale after leaching the plant with HCl to remove the inorganic impurities followed by a calcination treatment. The optimum calcination temperature appears to be around 500°C. Calcination of untreated E.hyemale causes a collapse of the biogenic silica structure which is mainly attributed to the detrimental action of alkali ions present in the native plant. Finally, pure b-SiC with a surface area of about 12 m2/g is obtained upon direct pyrolysis of HCl-treated E.hyemale samples in argon atmosphere. The original structure of native E.hyemale is substantially retained in the biomorphous b-SiC.
The results of this thesis lead to a better understanding of the silicification process and allow to draw conclusions about the role of silica in E.hyemale. In particular, a templating role of the plant biopolymers for the synthesis of the nanostructured silica within the plant body can be deduced. Moreover, the high grade ultrafine amorphous silica isolated from E.hyemale promises applications as adsorbent and catalyst support and as silica source for the fabrication of silica-based composites. The synthesis of biomorphous b-SiC from sustainable and low-cost E.hyemale is still in its initial stage. The present thesis demonstrates the principal possibility of carbothermal synthesis of SiC from E.hyemale with the prospect of potential applications, for instance as refractory materials, catalyst supports, or high performance advanced ceramics.Equisetum spp. (Schachtelhalm) ist die einzige überlebende Gattung der Schachtelhalmgewächse, die ihren Zenit während der Karbon Ära erreichten. Der Schachtelhalm ist eine krautartige Pflanze und wird durch verbundene Stämme mit fixiertem Wirtel der Knotenblätter unterschieden. Aufgrund seiner hohen Siliciumdioxid Bedeckung in der Epidermis sind Winterschachtelhalmen lange Zeit zur Reinigung von Küchegeräten und zum Polieren von Holz verwendet worden. Der Winterschachtelhalm (auch Scheuerkraut genannt) kann Siliciumdioxid bis zu 16% Trockengewicht in seinem Gewebe ansammeln. Dies macht aus dieser Pflanze einen interessanten Kandidaten als erneubare Ressource von Siliciumdioxid für die Synthese von biomorphen Keramiken. Die vorliegende Doktorarbeit beinhaltet eine ausführliche experimentelle Studie der Siliciumdioxidansammlungen in Winterschachtelhalmen mittels unterschiedlicher Charakterisierungstechniken auf allen hierarchischen Ebenen. Die Ergebnisse der Arbeit werfen neues Licht auf die lokale Verteilung, die chemischen Form, die Kristallinität und die Nanostruktur des biogenen Siliciumdioxids, die bisher ziemlich unklar waren. Außerdem werden Möglichkeiten zur Isolierung des biogenen Siliciumdioxids aus Winterschachtelhalmen untersucht, um hochgradig reines Siliciumdioxid zu erhalten. Auch wird die direkte carbothermale Synthese von Siliciumkarbid (b-SiC) aus Schachtelhalmen untersucht, mit dem Ziel einer kostengünstigen Herstellung von Hochleistungskeramiken aus nachwachsenden Rohstoffen Es wird gezeigt, dass das Siliciumdioxid in einer kontinuierlichen Schicht in der Epidermis vorliegt, mit der höchsten Siliciumkonzentration in den auffälligen knopfartigen Ausbuchtungen. Den höchsten Siliciumgehalt zeigen die Knopfspitzen (≈ 33%), gefolgt von der epidermalen Flanke (≈ 17%) und inneren unteren Teile der Knöpfe (≈ 6%), während es in den inneren Teilen der Pflanze praktisch kein Silicium gibt. Ramanspektroskopie beweist eindeutig, dass mindestens zwei Siliciumdioxid Modifikationen vorhanden sind. Der erste Typ ist reines hydratisiertes amorphes Siliciumdioxid, das auf den Bereich der Knopfspitzen beschränkt ist. Der zweite Typ wird in der gesamten kontinuierlichen äußeren Schicht angesammelt, weist keine Ramanbanden von Silanolgruppen auf, und ist örtlich eng verknüpft mit Banden von Polysacchariden (Zellulose, Hemizellulose, Pektin) sowie anorganischen Verbindungen. Der Großteil des Siliciumdioxids in Winterschachtelhalmen ist amorph mit unwesentlichen Mengen an kristallinem a-Quarz (< 7%). Die primären Siliciumdioxidpartikel haben eine plattenähnliche Form mit einer Dicke von ungefähr 2 nm. Hochreines mesoporöses amorphes Siliciumdioxid mit offener Porosität und innerer Oberfläche bis zu 400 m2/g kann aus Winterschachtelhalmen isoliert werden. Dies wird erreicht indem man die Pflanze mit Salzsäure behandelt um die anorganischen Verunreinigungen zu entfernen, gefolgt von einer Kalzinierung, wobei die optimale Temperatur bei etwa 500°C liegt. Im Gegensatz zu den chemisch vorbehandelten Schachtelhalmen, verursacht die Kalzinierung von unbehandelten Winterschachtelhalmen einen Kollaps der biogenen Siliciumdioxidstruktur, und es werden nur sehr kleine innere Oberflächen erzielt. Dies wird hauptsächlich dem Einfluss der Alkaliionen zugeschrieben die in der unbehandelten Pflanze vorhanden sind. Es wird schließlich gezeigt, dass durch direkte Pyrolyse der HCl-behandelten Winterschachtelhalme in Argonatmosphäre reines b-SiC mit einer Oberfläche von ungefähr 12 m2/g erzeugt werden kann. Die ursprüngliche Struktur von natürlichen Winterschachtelhalmen bleibt dabei im Wesentlichen im biomorphen b-SiC erhalten. Die Ergebnisse dieser Arbeit führen zu einem besseren Verständnis des Silicifizierungsprozesses und erlauben es auch, Aussagen über die mögliche Rolle von Siliciumdioxid in E.hyemale zu treffen. Insbesondere kann den Pflanzenpolymeren die Rolle eines Templates bei der Synthese des biogenen Siliciumdioxids im Pflanzengewebe zugeschrieben werden. Das aus den Pflanzen isolierte ultrafeine amorphe Siliciumdioxid mit hoher Reinheit verspricht potentielle Anwendungen, z.B. als Adsorbent oder Katalysatorsupport, und auch als Füllmaterial für die Herstellung von Komopositmaterialien. Die Synthese von biomorphem b-SiC aus erneubaren und preiswerten Winterschachtelhalmen steht zwar erst am Anfang, jedoch konnte die vorliegende Arbeit die prinzipielle Machbarkeit aufzeigen. Dieses Material scheint sehr vielversprechend für eine Reihe technischer Anwendung, zum Beispiel als Refraktärmaterial, Katalysatorsupport oder neuartige Hochleistungskeramik.
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Chan, Nathaniel K. (Nathaniel Kai Yip). "Design and implementation of series elastic actuation in a biomorphic robot leg." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40415.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.Includes bibliographical references (leaf 21).
Fluid, efficient, robust bipedal locomotion is hard by some approaches. Today's most advanced bipedal robots require flat and level floors, but are still prone to trips and falls. They have trouble interacting with objects in their surroundings, and adapting to them. We think that new approaches may make bipedal control easier. The following work details the design of the BOB (Bag of Bones) biomorphic robot leg that is a continuation of an effort to achieve a better understanding of the sensorimotor neurocontrol of locomotion, particularly in humans. Such an understanding will not only lead to robots that move as well or better than people while being easier to control, but will also enable powerful therapies for ataxia patients. One of the main design requirements for BOB was to incorporate series elastic actuation, but with hobby servo motors as the power source. The use of hobby servos was intended to keep costs low, as was the extensive use of off the shelf parts whenever possible. With the recent advances in hobby servo motors, it was expected that reasonable if not high performance would be possible. The specific contribution of this work includes the entire series elastic actuation system powered by servo motors.
(Cont.) The elements of the actuation system include circular servo horns, wire rope used in loops, turnbuckles, and series elastic elements that use compression springs in extension. It was found that the knee joint can flex from 0 to 90 degrees and back in about 0.7 seconds. Similarly, the ankle cycled from approximately 20 degrees of extension to approximately 35 degrees of flexion in about 0.7 seconds. These performance figures indicate that the gearing ratios at the knee and ankle are appropriate and that the current design is sufficiently powered for walking.
by Nathaniel K. Chan.
S.B.
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Ball, Nicholas W. "Decay: A Series of Prints Dealing with the Decay of Biomorphic Forms through Multiple States." Kent State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=kent1276637560.
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Ochrach-Konradi, Tirza Jo. "Classically Formal, Biotic Subjectivity: Moderating Plastic's Relation to the Viewer." Scholarship @ Claremont, 2019. https://scholarship.claremont.edu/scripps_theses/1323.
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Due to its cheap, pervasive, and disposable nature, post-consumer plastic has no subjectivity in its relation to the consumer. My thesis project examines the material’s inherent destructive narrative and question its ability to have extrinsic value beyond the assumptions of trash. In my research, I found that humans instinctually seek to conserve and treat biotic material with care. This fact has become a catalyst for the works in this project, which aim to not only increase the material’s value through animate biomorphic transformation, but also counter our disposable tendencies.
At the onset of this project, I was fixated solely on the physical potential of plastic, but in researching cultural narratives, I became more aware of the social significance that post-disposal plastic material holds. Artistic works by Mark Bradford and El Anatsui helped me understand the potential for re-inscribing new meaning into materials that have had a prior existence, and the art of Lynda Benglis and Tim Hawkinson inspired my technical application. From there, I applied the aesthetics of biomorphism, which resulted in a culminating piece that utilizes melted and deformed bubble wrap to evoke reptilian skin or a micro-biotic cell community.
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Botar, Oliver A. I. "Prolegomena to the study of biomorphic Modernism, biocentrism, Laszlo Moholy-Nagy's New vision and Erno Kallai's Bioromantik." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0009/NQ58653.pdf.
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Mayers, Jonathan. "Transmutational Harmony." ScholarWorks@UNO, 2011. http://scholarworks.uno.edu/td/1328.
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The work that I have produced during my graduate studies at the University of New Orleans addresses the impact that humans have on the environment in our contemporary world. A primary focus, but not exclusive, includes industrial materials or objects, their overwhelming presence that informs the juxtaposition of economic progress, and the reality of environmental disruption. Humor and metaphor are central themes of my work and reference my personal observations and experiences of living in the midst of these environments. Sources from Contemporary underground art have been filtered through my exposure to studio practice and art history, mainly the autonomous processes of Surrealism, resulting in a variety of influences that inform my work. I present imaginary images of architectural, biological, and mechanical transformations with the hopes of nudging the viewers' expectations and to create a better understanding of my opinion pertaining to the world and reality we all live in.
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Santamaria, Sylvia S. "Darwin or Frankenstein?" ScholarWorks@UNO, 2019. https://scholarworks.uno.edu/td/2639.
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Through sculpture and drawing, I create my own versions of natural specimens primarily based upon the visual unity of disparate organisms. Invented specimens are composed using a variety of processes employing a mixture of atypical materials following the (20th, 21st century) Postmodern shift away from formalist and traditional uses of any singular medium. As well as a variety of art materials, the specimens are hybrids of organic and biomorphic elements, blurring boundaries between botanical, animal, fungal, metal, and mineral. Is my approach perhaps like Charles Darwin, observant and studious naturalist, or am I more like Dr. Frankenstein, science fiction maker of monstrosities?
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Nitsche, Tanja Marie. "About Solving and Dissolving : Investigating the design possibilities of bio plastic." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-14906.
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Translating the conceptual term of sustainability into materials and exploring bio plastics in order to generate visually and tacitly intriguing objects are the aims for this project. Other designers and previous projects in the field of textile design showed how the material works in a small scale. This project used the material’s design properties to generate groups of object elements. The three main design properties of the material, transparency, biomorph expression and flexibility, and their opposites, opaqueness, geometric expression and stiffness, were combined in different sets which resulted in the used artistic methodology. Therefore, the material properties and earlier established techniques formed the base for finding the overall forms of the installations. The collection and a book about the surface design possibilities for plant based plastic show how the material can be manufactured. The installations focus on the interplay between colour, light and shadow, material texture and pattern in relation to the overall shape of the object. Moulding, laser cutting and the addition of other ingredients like recycled paper, fibres and mica powder influenced the material’s durability, flexibility, transparency and texture. Experiments revealed that the colours change over time and all of them are highly influenced in their intensity and shade by the light source behind the material. This project visualises how all these factors interact and which techniques and tools are required to process the new material. Moreover, it generates new options for a new formal language and terminology for sustainable interior textiles.
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Schirmacher, Carin M. [Verfasser], and Sokratis [Akademischer Betreuer] Georgiadis. "Paradoxien des Digital Turn in der Architektur 1990–2015. Von den Verlockungen des Organischen: digitales Entwerfen zwischen informellem Denken und biomorphem Resultat / Carin M. Schirmacher ; Betreuer: Sokratis Georgiadis." Heidelberg : arthistoricum.net, 2018. http://d-nb.info/1216141452/34.
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Oliveira, Monique Aline Arabites de. "Design de superfície : proposta de procedimento metodológico para criação de estampas têxteis com referência em elementos naturais." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/60732.
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O estudo descrito nessa dissertação abrange conhecimentos referentes às áreas de Biônica, Biomorfismo, Artes Visuais e Design de Superfície propondo um procedimento de projetação voltado para a elaboração de estampas têxteis com referência em elementos naturais. Considerando a natureza como fonte de referências visuais para a projetação no Design de Superfície, percebeu-se que associar pressupostos estéticos presentes na área com etapas de métodos de Design de Produto baseados em estudos de Biônica, poderia contribuir com a produção criativa dos desenhos de estampas. Desse modo, disponibiliza-se à audiência acadêmica e profissional um procedimento de projetação organizado a partir de um estudo exploratório-experimental com abordagem qualitativa, estruturado por revisão bibliográfica, entrevistas e experimentações. A primeira organização do procedimento foi realizada através da adaptação de etapas de três métodos de Design de Produto com base em estudos de Biônica. O procedimento resultante foi avaliado e aperfeiçoado a partir de quatro experimentações realizadas com estudantes e profissionais da área. O resultado é um procedimento com oito passos voltado ao desenvolvimento de estampas com referências biomórficas. A pesquisa aponta que o contato direto do designer de superfície com o elemento natural, aliado ao resgate de técnicas de desenho manual e à reflexão contínua dos procedimentos adotados durante a projetação, contribui com o planejamento e processo de desenvolvimento de estampas pelos projetistas. Ou seja, projetar a partir de etapas organizadas e adaptáveis conforme as necessidades de cada briefing facilita o processo de projetação de estampas com referências naturais e converge para novos resultados na perspectiva de contribuir com as produções disponíveis no mercado atualmente. A conclusão do trabalho oferece algumas possibilidades de prosseguimento da pesquisa, como a organização de cursos envolvendo conhecimentos das áreas de Design de Superfície e Biônica e a verificação e aplicação do procedimento aqui proposto no âmbito industrial.The study described in this dissertation covers knowledge regarding areas of Bionics, Biomorphism, Visual Arts and Surface Design to propose a procedure for developing textile designs which incorporate natural elements. Considering nature as a source of visual references for projecting in the surface design, it was realized that associating esthetic assumptions present in the area with steps of methods of product design based in studies in Bionics could contribute with the creative production of drawings in prints. In this way, it is made available to the academic and professional audience a projecting procedure organized based on an exploratory-experimental study with qualitative approach, structured in literature review, interviews and experimentations. The first procedure organization was performed through adaptation of steps of three methods of product design based on Bionics studies. The resulting procedure was evaluated and improved from four experiments performed with students and professionals in the field. The result is a procedure with eight steps focused on the development of patterns with biomorphic references. The research suggests that direct contact from the designer with the natural elements, coupled with the rescue of hand drawing techniques and continuous reflection of the procedures adopted during the development contributes to the creative process by facilitating the search for visual references. In other words, projecting from arranged and adaptable steps according to the projective needs eases the procedure of prints projecting with natural references and converges to creative and differentiated results which can contribute to the products available nowadays in the market. The conclusion of the study offers some possibilities for further research, as the organization of courses involving knowledge of the areas of Surface Design and Bionics and the verification and application of the procedure proposed here in the industrial field.
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Brown, Jacqueline. "Surging Seepage: A Triple Bond Accretion System." VCU Scholars Compass, 2008. http://scholarscompass.vcu.edu/etd/1481.
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My current work revels in a state of flux. I strive for the work to be electrically charged, conveying a feverish sense of immediacy and vitality that implies motion and frenetic energy. The work is an accretion of brightly colored biomorphic forms that extend out from the wall and onto the floor. Viscous parts ooze and drip while others are globular and bulbous. The hyper-organic forms suggest a paradoxical state of both ripening and rotting, becoming and unbecoming. The work is an attempt to traverse between seemingly divergent constructs, some of which include: growth and decay, the artificial and the natural, the body and the landscape, the infinite and the miniscule, and the real and the imagined. I intend for the works to be suggestive of mutation, of systems becoming cross-wired and melting into each other.
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Mühlstedt, Jens, Katharina Pöschel, and Angelika C. Bullinger. "Methodisch-systematische Analyse der Mensch-Maschine-Biomorphisierung." Universitätsbibliothek Chemnitz, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-107546.
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Der Beitrag befasst sich mit einer ersten methodisch-systematischen Analyse der Biomorphisierung von Mensch-Maschine-Schnittstellen, also der Nutzung von biologischen Aktivitätsmustern für Signalkodierungen. Aufbauend auf Beispielen aus dem Alltag werden menschliche Eigenschaften, die sich zur Anthropomorphisierung und Biomorphisierung eignen, analysiert. Sodann werden geeignete Signalparameter zusammengestellt, die mit den technischen Ausgabemöglichkeiten und den dazugehörigen Signalen verbunden werden können. Beispielhaft wurde bei der Mensch-Maschine-Schnittstelle eines Geldautomaten eine Biomorphisierung deren Interaktionen vorgenommen. Ein Ausblick auf Folgeuntersuchungen, welche die Interaktionen evaluieren, schließt den Beitrag.
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Pajėdienė, Angelė. "Vilniaus miesto Karoliniškių mikrorajono Pasakų parko floristiniai tyrimai ir jų panaudojimas moksleivių ugdymo procese." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2007. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20070816_173748-70791.
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Tyrimas vykdytas 2004 – 2007 metais, Vilniaus miesto Karoliniškių mikrorajono Pasakų parke. Anotuotas augalų rūšių sąrašas sudarytas remiantis Tachtadžiano sistema (Tachtadjan A.1978), atlikta ekologinė floros analizė pagal Ellenbergą (Ellenberg H.1991), chorologinė − pagal Natkevičaitės-Ivanauskienės sistemą, biomorfinė − pagal atsinaujinimo pumpurų išsidėstymą (Raunkiar CH.), nustatyta parko augalų bendrijų sintaksonominė struktūra.
Pasakų parke identifikuotos 210 augalų rūšys, priklausančios 155 gentims ir 55 šeimoms. Išanalizavus augalų spektrą nustatyta, kad didžiausią dalį sudaro astrinių (19,8%), pupinių (16,5%) bei erškėtinių šeimų augalai (14,1%). Pasakų parke aptiktos dvi į Raudonąją knygą įrašytos augalų rūšys – Epipactis atrorubens (tamsialapis skiautalūpis) ir Pulsatilla patens (vėjalandė šilagėlė). Nustatyta, kad 45,1 % augalų vidutiniškai reiklūs šviesai, 51,6 % vidutinio šiltumo augaviečių augalai, 29 % augalų priklauso centrinei Vidurio Europos daliai, 38,7 % vidutinio dirvožemio drėgnumo augalų. Pagal augalų gyvenimo formas didžiausią dalį sudaro hemikriptofitai (42,8 % ), kriptofitai – 18,1 %, fanerofitai – 14,3 %, chamefitai ir terofitai po 10 % nuo visų augalų rūšių.Parke išskirtos augalų bendrijų klasės: Borealiniai Šiaurės pusrutulio spygliuočių miškas ir Pamiškių, miško aikštelių ir šlaitų pieva. Parengtas parko pažintinio tako projektas: tako ilgis 2 km, jame numatyta 10 stotelių. Išsiaiškintos moksleivių nuostatos, poreikiai, pažintiniai... [toliau žr. visą tekstą]The research was made in Pasakų Park, Karoliniškiai district, Vilnius city, in 2004 – 2007. Annotated plant species list was formed on the basis of Tachtadjan system, (Tachtadjan A.1978), ecological flora analysis was made according to Ellenberg (Ellenberg H.1991), chloric analysis, according to Natkevičaitė−Ivanauskienė‘s system, biomorphic – according to renewed buds‘ position (Raunkiar CH.); park plants communities‘ syntaxonomic structure was determined. 210 plant species, which belong to 155 plant genus and to 55 plant families were identified in Pasakų Park. Plant spectrum analysis revealed that the biggest part of plants belong to aster family (19,8%) bud family- (16,5%), eglantine family (14,1%). Two plant species that are included into The Red Book of Endangered Species were found in the Park¬ − Epipactis atrorubens (The Dark Red Helleborine) and Pulsatilla patens (wild crocus). It is determined that 45,1 % of the plants need the average light, 51,6 % - need the average heat to grow, 29 % belong to Middle Europe plants; 38,7 % of the plants grow in the soil with average wetness. According to plant life forms categories, the biggest part of the plants in the Park belong to (42,8 % ) Hemicryptophyte, cryptophyte-18,1 %, Phanerophyte – 14,3 %, chamaephyte and therophyte 10%. The following plant communities’ classes were determined in the Park: Boreal zone’s Northern hemisphere’s coniferous forest and the outer wood ground’s and slopes’ field. Park’s Cognitive... [to full text]
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Matsui, Hiromi. "L'architectonique cubiste du corps : les schémas anatomiques chez Picasso et Raymond Duchamp-Villon, 1907-1918." Thesis, Paris 10, 2015. http://www.theses.fr/2015PA100038.
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Cette étude se focalise sur l’examen conjoint des représentations du corps dans les œuvres de Pablo Picasso et de Raymond Duchamp-Villon. Afin d’apporter un éclairage nouveau sur la représentation du corps cubiste, notre objectif est d’examiner la portée de la connaissance de l’anatomie artistique, branche scientifique se rapportant non seulement à l’anatomie (au sens plus spécifique de l’ostéologie et de la myologie) mais aussi à l’étude de la proportion humaine, à la physiologie, la physionomie, l’ethnologie, l’anthropologie et la morphologie. En élaborant une nouvelle interprétation des images cubistes qui la relierait à la fois à la science anatomique et au classicisme dans le cadre de l’histoire de l’art, notre recherche ouvre une étude morphologique du cubisme à de multiples disciplines, comme l’esthétique et l’épistémologie. Si la recherche picturale de Picasso porte sur la structure du corps humain, Duchamp-Villon cherche pour sa part à représenter le dynamisme et la vitalité du corps. En d’autres termes, en partant des mêmes savoirs scientifiques ces deux artistes proposent deux modalités différentes de l’architectonique de la représentation du corps : se dispensant de théoriser cette architectonique, Picasso et Duchamp-Villon découvrent une expression du corps qui leur est propre. Par ce biais, nous cherchons à mettre en lumière les modalités par lesquelles le schéma cubiste se forme dans l’oscillation entre art et sciences, intuition et intelligence, subjectivité et objectivité, métamorphose organique des images et modélisation mécanique du corpsThis study focuses on the analyses of the representations of the human body in the works of Pablo Picasso and Raymond Duchamp-Villon during their cubist periods. In order to shed some new light on the representation of the body in the cubist works of these two artists, the importance and the modality of the artistic anatomy is examined. This includes branches of science related not only to the anatomy (specifically osteology and myology), but also to the study of human proportion to the physiology, physiognomy, ethnology, anthropology, and morphology. Developing a new interpretation of Cubist images that is linked both with anatomical science and classicism in art historical context, this research corresponds to a morphological study of Cubism in multiple disciplines, such as aesthetics and epistemology. In particular, this study's aim is to consider two different forms of architectonic representation of the cubist body, starting from the same scientific knowledge. If research of Picasso is concerned mostly with the structure of the human body, Duchamp-Villon's seeks the dynamism and vitality of the body: far from axiomatizing scientific knowledge, the two artists rectify it in their own way to discover their unique expressions. Through this, the method by which the cubist pattern is formed in the oscillation between art and science is clarified, between: intuition and intelligence; subjectivity and the objectivity; and organic metamorphosis of images and the schematization of the mechanical body
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McCoppin, Jared Ray. "FABRICATION AND MASS TRANSPORT ANALYSIS OF TAPE CAST NANO-SILVER HIGH TEMPERATURE SOLDER." Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1389285958.
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Hecht, Mandy. "Particulate systems and thin-film based platforms." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17329.
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Die Verbindung von hoch entwickelten Nanomaterialien mit fluoreszenzbasierten Technologien hat sich zu einem aufstrebenden Forschungsbereich entwickelt. Nichtsdestotrotz ist bis heute der Schritt von einem organischen Indikatormolekül zum anwendbaren Sensorsystem ein komplexer Prozess. Diese Arbeit zielte darauf ab, sensorische Materialien verschiedener chemischer Natur für diverse Analyten zu entwickeln, zu charakterisieren und zu etablieren. Hierbei wurden zunächst pH sensitive Fluoreszenzfarbstoffe entwickelt und in dünnen Membranen immobilisiert. Der Teststreifen ermöglicht die Beurteilung von pH-Änderungen mit dem Auge. Darüber hinaus wurde gezeigt, wie diese Farbstoffe auch in eine wasserlösliche Form überführt werden können. Damit konnten lokale pH-Änderungen an der Wachstumsfront von Silikat-Biomorphs detektiert werden. Auch partikuläre Systeme stellten sich als geeignete Materialien heraus. Es konnte gezeigt werden, wie die Silikat-Matrix von Partikeln zu verbesserten Eigenschaften für Farbstoffe führt. Mittels farbstoffbeladener Partikel konnte in einem Lateral-Flow-Assay ein schneller Nachweis von TATP etabliert werden. Ein anderer Ansatz verfolgte das Ziel des sensitiven Nachweises von Quecksilberionen in Wasser. In einem anderen System konnten Silikat-Nanopartikeln so funktionalisiert werden, dass ein sensitiver und selektiver Nachweis von Schwermetallionen und Anionen über ein Quencher-Displacement-Assay gelang. Zusätzlich wurde die einzigartige Oberfläche von Zellulosepartikeln mithilfe eines neu entwickelten Fluoreszenzfarbstoffs untersucht. Die untersuchten Materialien und Strategien zeigen, wie leicht innovative Moleküle für potentielle sensorische Systeme im wässrigen Medium auf Basis von fluoreszierenden Partikeln und dünnen Schichten geschaffen werden können. Das Verhalten der hergestellten Materialien wurde über spektroskopische Methoden evaluiert und dabei, wenn möglich, die Parameter Sensitivität, Selektivität und Ansprechzeit beurteilt.The combination of fluorescence and nanomaterials has developed into an emerging research area. Nonetheless until now the step from an organic sensory molecule to a final sensor format is a complex endeavor. This thesis aimed at the preparation of particulate and thin-film based platforms for various analytes through combining the features of an appropriate host material with outstanding properties of dyes concomitant with sensitive fluorescence detection techniques. In particular, pH sensitive fluorescent probes were sterically immobilized into a thin membrane. The dip-stick allows the assessment upon change in pH with the eye. Especially a probe working at high basic pH range was converted into a water-soluble analogue and was directly applied at the growth front of silica biomorphs to detect local pH changes. But also particulate structures are suitable host materials. It is shown how the silica matrix of nanoparticles lead to improved optical properties for embedded dyes. The interactions of silica and fluorescent dyes within the pores of mesoporous particles were exploited to develop an actual sensor format based detection of TATP. In another approach it was possible to detect mercury ions in water. Heavy metal ions were also successfully detected in a quencher displacement assay involving receptor-dye functionalized silica nanoparticles. The impact of the unique surface properties of cellulose microparticles was shown by a fluorescent dye which allows an assessment of the surface functional groups and microenvironment through the reactivity and its changes in the optical properties. The performance of the prepared materials were evaluated mostly by spectroscopic methods and if possible assessed in terms of sensitivity, selectivity and response time. The newly developed and investigated materials based on fluorescent particulate and thin-films show the facile application of innovative sensor probes for potentially sensing devices.
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Sapei, Lanny [Verfasser]. "Charakterisierung von Siliciumdioxid in Winterschachtelhalmen und dessen Umwandlung in biomorphe Keramiken = Characterisation of silica in Equisetum hyemale and its transformation into biomorphous ceramics / von Lanny Sapei." 2007. http://d-nb.info/987189018/34.
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Ghanem, Hanadi [Verfasser]. "Processing of biomorphic porous ceramics by chemical vapor infiltration and reaction technique (CVI-R) = Herstellung biomorpher, poröser Keramiken mittels chemischer Gasphaseninfiltration und Reaktion / vorgelegt von Hanadi Ghanem." 2008. http://d-nb.info/991601882/34.
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Erceg, LS. "Biomorphic loop : visualising patterns of growth." Thesis, 2017. https://eprints.utas.edu.au/23781/1/Erceg_whole_thesis.pdf.
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This project investigates how plastic fibres can be manipulated to create artworks that visualise the growth, adaptability and collapse of living systems. Drawing on a number of mathematical and scientific concepts used to interpret patterns in nature, I have created sculptural forms that explore modularity, repetition, scale-ability, connectivity and the dynamic tension between order and chaos that underpins all growth. My studio investigation focusses on manipulating a variety of plastic fibres, transforming these materials through the basic stitching processes of looping, knotting, binding and threading as an analogue for growth processes. In particular, the ability of the crochet stitch to continuously expand into complex foldings and interconnections is used to investigate organic patterns of growth including: spherical; branching; crenelated and fractal forms. The resulting artworks have a real world ecological context in the discarded plastic debris and fishing ‘ghost nets’ that are accumulating in the ocean. Representing a system that is growing and self-generating, the problem of plastic waste becomes a timely analogy for the way in which benign patterns of growth can become malevolent and dangerous.
The visual context for this project is informed by the work of contemporary artists who rigorously engage with their chosen materials in order to explore the images and ideas of growth. Ruth Asawa, Margaret and Christine Wertheim and Tara Donovan all produce sculptural works through the application of rules and iterative repetition. While referencing scientific and mathematical theories, they interpret rather than imitate the generative possibilities of biological modelling of pattern. Eva Hesse, Ernesto Neto and Lucy Irvine also investigate iterative processes, however their primary focus is on discovering the expressive potential of their materials through structures that elicit metaphorical triggers and associations.
As this project has evolved, I have given more emphasis to disordered, transient and ephemeral qualities. Having no beginning, middle or end, my various sculptural elements connect in formations that are infinitely reconfigurable and adaptable. These open-ended and flexible qualities align my project with the concept of the ‘rhizome’ as proposed by Deleuze and Guattari and to the associated concepts of contemporary complexity theory and the formation of emergent, self-organising structures. In tandem with these theoretical underpinnings, my project also references the culturally loaded symbolism of fibre, evoking both a linear pathway and a stitched boundary that enables connection, separation or containment.
During the course of this project, a series of test installations have given valuable insights into the potential for meanings to shift as materiality, structural shape, connectivity, scale, space and lighting are investigated as experiential elements. The culmination of these findings is presented in the thesis exhibition, comprised of gallery-based artworks focussing on a series of interrelated sculptural installations. This project concludes that the processes of stitching can be used to manipulate and transform plastics so that they reveal their true material nature as an infinitely malleable shape-shifter and invasive, ecological coloniser.
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"Synthesis of biomorphic silicon carbide from wood." 2008. http://library.cuhk.edu.hk/record=b5893741.
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by Li, Kowk Cheung = 利用木材製作具有生物形態的碳化矽 / 李國彰.Thesis (M.Phil.)--Chinese University of Hong Kong, 2008.
Includes bibliographical references.
Abstracts in English and Chinese.
by Li, Kwok Cheung = Li yong mu cai zhi zuo ju you sheng wu xing tai de tan hua xi / Li Guozhang.
Abstract --- p.i
摘要 --- p.iii
Acknowledgements --- p.v
Table of contents --- p.vi
List of figure captions --- p.x
List of table captions --- p.xiv
Chapter Chapter 1 --- Introduction
Chapter 1.1 --- Biomorphic products and their potential applications --- p.1
Chapter 1.2 --- Structures and mechanical behaviors of wood --- p.1
Chapter 1.3 --- Characteristics and applications of SiC --- p.2
Chapter 1.4 --- Common methods of producing biomorphic SiC from wood --- p.2
Chapter 1.4.1 --- Chemical vapor deposition --- p.3
Chapter 1.4.2 --- Melt infiltration --- p.3
Chapter 1.4.3 --- Sol-gel process --- p.4
Chapter 1.5 --- Carbothermal reduction process of silica --- p.5
Chapter 1.6 --- Objectives of present work --- p.5
Chapter 1.6.1 --- Comments on the previous works --- p.5
Chapter 1.6.2 --- Current approaches --- p.6
References --- p.8
Chapter Chapter 2 --- Experimental procedures
Chapter 2.1 --- Wood biotemplates --- p.10
Chapter 2.1.1 --- Balsa --- p.10
Chapter 2.1.2 --- Flame tree --- p.10
Chapter 2.2 --- Sol Gel process --- p.11
Chapter 2.2.1 --- Precursor --- p.11
Chapter 2.2.2 --- Reaction mechanisms --- p.11
Chapter 2.2.3 --- "Effects of pH, temperature, and environment" --- p.12
Chapter 2.3 --- Preparation of biomorphic SiC
Chapter 2.3.1 --- HC1 pretreatment --- p.13
Chapter 2.3.2 --- Infiltration of silica via sol gel process --- p.13
Chapter 2.3.2.1 --- Balsa --- p.14
Chapter 2.3.2.2 --- Flame tree --- p.15
Chapter 2.3.3 --- Sintering --- p.15
Chapter 2.3.4 --- Removal of carbon --- p.15
Chapter 2.4 --- Characterization methods --- p.16
Chapter 2.4.1 --- Scanning electron microscope and energy dispersive x-ray spectroscopy --- p.16
Chapter 2.4.2 --- X-ray diffractometry --- p.16
Chapter 2.4.3 --- Differential thermal analysis --- p.16
Chapter 2.4.4 --- Compressive strength analysis --- p.17
Chapter 2.5 --- Summary --- p.17
References --- p.18
Figures --- p.19
Chapter Chapter 3 --- Results and discussions
Chapter 3.1 --- Balsa --- p.21
Chapter 3.1.1 --- HC1 pretreatment --- p.21
Chapter 3.1.2 --- Infiltration behaviors --- p.21
Chapter 3.1.2.1 --- By the standard method --- p.21
Chapter 3.1.2.2 --- Modified sol-gel process --- p.21
Chapter 3.1.3 --- SiC products --- p.22
Chapter 3.1.3.1 --- Volumetric shrinkage and weight loss --- p.22
Chapter 3.1.3.2 --- Compositions --- p.23
Chapter 3.1.3.3 --- Morphology and structure --- p.24
Chapter 3.1.4 --- Optimal infiltration conditions --- p.25
Chapter 3.2 --- Flame tree --- p.25
Chapter 3.2.1 --- HC1 pretreatment --- p.26
Chapter 3.2.2 --- Infiltration behaviors --- p.26
Chapter 3.2.3 --- SiC products --- p.26
Chapter 3.2.3.1 --- Volumetric shrinkage and weight loss --- p.26
Chapter 3.2.3.2 --- Composition --- p.27
Chapter 3.2.3.3 --- Morphology and structure --- p.27
Chapter 3.3 --- Mechanisms for the formation of SiC cell walls --- p.30
Chapter 3.4 --- Compressive strength --- p.31
Chapter 3.5 --- Summary --- p.34
References --- p.35
Tables --- p.36
Figures --- p.38
Appendix --- p.65
Chapter Chapter 4 --- Conclusions and future works
Chapter 4.1 --- Summary --- p.67
Chapter 4.2 --- Suggestions for future work --- p.68
References --- p.70
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Tu, Chih-Chao, and 涂智超. "Biomorphic Performance Oriented Generative Design with GA." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/16689366461400221128.
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碩士國立臺灣科技大學
建築系
100
In this research, we proposed an evolutionary architectural design method to provide conceptual yet performative architectural schemes for early stage of the design process of architectural projects. The design method is based on computational technologies as essential components, which the method utilizes digital design modeling tools, computer simulations and algorithms to contribute to the respective process of the design method. During this research, we have been constructing the building design developing work-flow, for each procedures governed by different CAD instruments and techniques to support the design process. And most importantly, it’s able to effectively propose relatively developed architectural schemes as resultant outcome. By the presented procedures of information association, design encode, design variable construction, system simulation and algorithm iteration, it contributes to a multiple performative generative design process that being capable of providing an desiring design solution for architectural projects. In this research, we facilitate digital modeling tools Rhinoceros and programming environment Grasshopper along with its plug-in, building connections with environmental simulation software, and incorporate Genetic Algorithms to complete generative design process and building performance optimization. The generative design method, the respective design process and the adaptive, performative design logic are the evolutionary approaches to alternate and improve early architectural design processes. The method has present great potential to implement on practical projects in the early stage of design process to explore design possibilities, as well as providing structured architectural schemes and objective optimized solutions.
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Carnerup, Anna. "Biomorphs : morphology, chemistry, and implications for the identification of early life." Phd thesis, 2007. http://hdl.handle.net/1885/147102.
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Ritto, Gonçalo Nuno Fernandes. "Growing of biomorphic nanomaterials based on calcium carbonate." Master's thesis, 2016. http://hdl.handle.net/10362/20676.
Full textAbstract:
Calcium carbonate was produced by precipitation: oil bath and ultra-sounds, being studied several parameters such as: temperature, magnetic stir speed, concentration of the reagents, duration of the reaction and the medium of the reaction. Samples rested for a month before some of the precipitated was removed, washed and dried to get the powder characterized without any secondary product or the solvent of the reaction.
Dip-coating technique was also used to produce calcium carbonate with an organic matrix (PVP - Polyvinylpyrrolidone) in an attempt to produce artificial nacre. Several parameters were also modified: number of coating cycles, temperature, dip and dry time; presence/absence of an in-between step and dipping speed.
Two anhydrous polymorphs of calcium carbonate were produced from both methods: vaterite and calcite.
Some samples were characterized by XRD (X-ray Diffraction), Raman Spectroscopy and were analysed by SEM (Scanning Electron Microscopy).
Spectrophotometry was also used to analyse the absorbance/transmittance and reflectance of some dip-coated samples. The samples with an organic matrix showed a very high transmittance in the infra-red region and a very low transmittance in the visible region unlike samples with just inorganic layers indicating the possibility of formation of an organic/inorganic complex.
40
Almeida, Streitwieser Daniela [Verfasser]. "Kinetic investigation of the chemical vapor infiltration and reaction (CVI-R) process for the production of SiC and TiC biomorphic ceramics from paper preforms = Kinetische Untersuchung der chemischen Gasphaseninfiltration und Reaktion zur Hertsellung von SiC- und TiC-biomorphen Keramiken aus Papier-Vorformen / Daniela Almeida Streitwieser." 2005. http://d-nb.info/974205966/34.
Full text
41
"Formation and characterization of SiO₂ and SiC nanowires on biomorphic bamboo." 2006. http://library.cuhk.edu.hk/record=b5893003.
Full textAbstract:
Cheung Lok Ying Teresa = 竹炭模板上形成的二氧化硅與碳化硅納米線及其表徵 / 張樂影.Thesis (M.Phil.)--Chinese University of Hong Kong, 2006.
Includes bibliographical references.
Text in English; abstracts in English and Chinese.
Cheung Lok Ying Teresa = Zhu tan mo ban shang xing cheng de er yang hua gui yu tan hua gui na mi xian ji qi biao zheng / Zhang Leying.
ABSTRACT --- p.i
摘要 --- p.iii
ACKNOWLEDGEMENTS --- p.v
TABLE OF CONTENTS --- p.vii
LIST OF FIGURE CAPTIONS --- p.xi
LIST OF TABLE CAPTIONS --- p.xv
Chapter Chapter 1 --- Introduction
Chapter 1.1. --- Biomineralization process --- p.1
Chapter 1.2. --- Structures in biological matters --- p.2
Chapter 1.2.1. --- Bone --- p.2
Chapter 1.2.2. --- Wood --- p.3
Chapter 1.3. --- Biomorphic products and their potential applications --- p.4
Chapter 1.3.1 --- Environment conscious products --- p.4
Chapter 1.3.2 --- Properties --- p.5
Chapter 1.3.3 --- Carbide and oxide composites --- p.5
Chapter 1.4 --- Common fabrication approaches --- p.6
Chapter 1.4.1 --- Gaseous infiltration --- p.7
Chapter 1.4.2 --- Liquid infiltration --- p.7
Chapter 1.4.3 --- Sol-gel method --- p.8
Chapter 1.5 --- Growth of nanowires --- p.8
Chapter 1.5.1 --- Vapor-liquid-solid (VLS) mechanism --- p.9
Chapter 1.5.2 --- Solution-liquid-solid (SLS) mechanism --- p.9
Chapter 1.5.3 --- Vapor-solid (VS) mechanism --- p.10
Chapter 1.6 --- Goals of the project --- p.10
Chapter 1.6.1 --- Feedbacks on previous works --- p.10
Chapter 1.6.2 --- Our breakthrough approach --- p.11
Chapter 1.7 --- Thesis layout --- p.12
References --- p.13
Figures --- p.17
Chapter Chapter 2 --- Samples preparation and characterization methods
Chapter 2.1 --- Materials selections --- p.22
Chapter 2.1.1 --- Selection of materials for biomorphic substrate --- p.22
Chapter 2.1.2 --- Selection of solution for infiltration --- p.23
Chapter 2.2 --- Samples preparation --- p.24
Chapter 2.2.1 --- Pyrolysis of raw bamboo --- p.24
Chapter 2.2.2 --- Infiltration of reactants --- p.25
Chapter 2.2.3 --- Sintering conditions --- p.26
Chapter 2.3 --- Characterization methods --- p.26
Chapter 2.3.1 --- Scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS) --- p.27
Chapter 2.3.2 --- Transmission electron microscopy (TEM) and EDS --- p.27
Chapter 2.3.3 --- High-resolution transmission electron microscopy (HRTEM) --- p.27
Chapter 2.3.4 --- X-ray diffraction (XRD) --- p.28
Chapter 2.3.5 --- X-ray photoelectron spectroscopy (XPS) --- p.28
Chapter 2.3.6 --- Fourier transform infrared spectroscopy (FTIR) --- p.29
Chapter 2.4 --- Conclusions --- p.29
References --- p.30
Figures --- p.31
Tables --- p.33
Chapter Chapter 3 --- Bamboo biomorphic substrates
Chapter 3.1 --- Overview --- p.34
Chapter 3.2 --- Volumetric shrinkage and weight loss --- p.34
Chapter 3.3 --- General morphology --- p.35
Chapter 3.4 --- Intrinsic impurities --- p.35
Chapter 3.5 --- Structures --- p.36
References --- p.38
Figures --- p.39
Chapter Chapter 4 --- Silica
Chapter 4.1 --- Overview --- p.43
Chapter 4.2 --- Thermal analyses --- p.44
Chapter 4.2.1 --- Raw biomorphic substrates --- p.44
Chapter 4.2.2 --- Infiltrated biomorphic substrates --- p.45
Chapter 4.3 --- Experiments --- p.46
Chapter 4.4 --- Characterization in general --- p.47
Chapter 4.4.1 --- General morphologies --- p.47
Chapter 4.4.2 --- Tips of the SiO2 nanowires --- p.48
Chapter 4.5 --- Effects of sintering duration --- p.48
Chapter 4.6 --- Effects of sintering temperature --- p.49
Chapter 4.6.1 --- "Different temperatures, held for one hour" --- p.50
Chapter 4.6.2 --- "Different temperatures, held for ten hours" --- p.50
Chapter 4.7 --- Growth mechanisms --- p.52
Chapter 4.8 --- Summary --- p.54
References --- p.56
Figures --- p.58
Tables --- p.75
Chapter Chapter 5 --- Silicon carbide
Chapter 5.1 --- Overview --- p.76
Chapter 5.2 --- Experiments --- p.77
Chapter 5.3 --- Characterization in general --- p.78
Chapter 5.3.1 --- General morphologies --- p.78
Chapter 5.3.2 --- Stacking faults and twinning --- p.79
Chapter 5.3.3 --- Tips of the SiC nanowires --- p.81
Chapter 5.4 --- Growth mechanisms --- p.82
Chapter 5.5 --- Summary --- p.83
References --- p.84
Figures --- p.87
Chapter Chatper 6 --- Conclusions and future works
Chapter 6.1 --- Main results of this projects --- p.101
Chapter 6.2 --- Future works --- p.103
References --- p.104
42
"Fabrication and characterization of a porous CuO/CeO₂/Al₂O₃ biomorphic compound." 2009. http://library.cuhk.edu.hk/record=b5894162.
Full textAbstract:
Chiu, Ka Lok = 多孔生物遺態氧化銅/氧化鈰/氧化鋁之複合物料的製作及其定性分析 / 趙家樂.Thesis (M.Phil.)--Chinese University of Hong Kong, 2009.
Includes bibliographical references.
Abstract also in Chinese.
Chiu, Ka Lok = Duo kong sheng wu yi tai yang hua tong/yang hua shi/yang hua lu zhi fu he wu liao de zhi zuo ji qi ding xing fen xi / Zhao Jiale.
Abstract --- p.i
摘要 --- p.iii
Acknowledgment --- p.v
Table of contents --- p.vi
List of table captions --- p.x
List of figure captions --- p.xi
Chapter Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Carbon monoxide (CO) --- p.1
Chapter 1.2 --- Production of hydrogen from methanol for fuel cell --- p.2
Chapter 1.3 --- Catalysts for CO oxidation and methanol reforming --- p.5
Chapter 1.4 --- Copper-based catalysts --- p.6
Chapter 1.5 --- Mechanisms in the catalytic processes --- p.7
Chapter 1.6 --- Synthesis of Cu-based catalysts --- p.10
Chapter 1.7 --- Potential applications of the biomorphic CuO/CeO2/Al2O3 catalyst --- p.11
Chapter 1.8 --- Objectives and the thesis layout --- p.12
Chapter 1.9 --- References --- p.13
Chapter Chapter 2 --- Methods and Instrumentation --- p.16
Chapter 2.1 --- Sample preparations --- p.16
Chapter 2.1.1 --- Syntheses of the biomorphic samples --- p.16
Chapter 2.1.2 --- Syntheses of the control samples (R1 and R2) --- p.17
Chapter 2.2 --- Characterization --- p.18
Chapter 2.2.1 --- Scanning electron microscope (SEM) --- p.18
Chapter 2.2.2 --- Transmission electron microscopy (TEM) --- p.19
Chapter 2.2.3 --- X-ray powder diffractometry (XRD) --- p.20
Chapter 2.2.4 --- Fourier transform infrared (FTIR) spectroscopy --- p.21
Chapter 2.2.5 --- Raman scattering (RS) spectroscopy --- p.22
Chapter 2.2.6 --- Differential thermal analysis (DTA) --- p.22
Chapter 2.2.7 --- Thermogravimetric analysis (TGA) --- p.23
Chapter 2.2.8 --- Gas sorption surface analysis (GSSA) --- p.24
Chapter 2.3 --- Catalytic activity --- p.25
Chapter 2.3.1 --- CO oxidation --- p.25
Chapter 2.3.2 --- Partial oxidation of methanol (POMe) --- p.27
Chapter 2.3.3 --- Steam reforming of methanol (SRMe) --- p.28
Chapter 2.4 --- References --- p.29
Chapter Chapter 3 --- "Results, discussions and characterization" --- p.31
Chapter 3.1 --- Biomorphic samples --- p.31
Chapter 3.1.1 --- Macrostructures --- p.31
Chapter 3.1.2 --- SEM and TEM results --- p.32
Chapter 3.1.3 --- XRD analysis and chemical compositions --- p.35
Chapter 3.1.4 --- RS results --- p.41
Chapter 3.1.5 --- FTIR results --- p.44
Chapter 3.1.6 --- Thermal property --- p.46
Chapter 3.1.7 --- Porosity analysis --- p.48
Chapter 3.2 --- Control sample R1 --- p.52
Chapter 3.2.1 --- Microstructures --- p.52
Chapter 3.2.2 --- Surface area and porosity --- p.55
Chapter 3.2.3 --- Thermal property --- p.56
Chapter 3.2.4 --- "XRD, FTIR and RS results" --- p.58
Chapter 3.3 --- Control sample R2 --- p.60
Chapter 3.3.1 --- Microstructures --- p.60
Chapter 3.3.2 --- Surface area and porosity --- p.61
Chapter 3.3.3 --- "XRD, FTIR and RS results" --- p.62
Chapter 3.3.4 --- Thermal property --- p.63
Chapter 3.4 --- Formation mechanisms of the biomorphic samples --- p.64
Chapter 3.5 --- Impacts of the Cu/Ce/Al ratios on the CuO dispersion --- p.66
Chapter 3.6 --- Cotton biotemplate --- p.66
Chapter 3.7 --- Formation mechanisms of R1 and R2 --- p.67
Chapter 3.8 --- References --- p.69
Chapter Chapter 4 --- Evaluations of Catalytic Activities --- p.71
Chapter 4.1 --- CO oxidation --- p.71
Chapter 4.2 --- POMe --- p.79
Chapter 4.3 --- SRMe --- p.91
Chapter 4.4 --- Physical properties of the biomorphic samples before and after the reactions --- p.97
Chapter 4.5 --- Structure of the sample and its catalytic performance --- p.102
Chapter 4.6 --- CuO dispersion and the catalytic performance --- p.103
Chapter 4.7 --- Al2O3 and CeO2 and the catalytic performance --- p.105
Chapter 4.8 --- Catalytic performance of the biomorphic samples and R2 --- p.108
Chapter 4.9 --- References --- p.109
Chapter Chapter 5 --- Conclusions and suggestions for further studies --- p.110
Chapter 5.1 --- Conclusions --- p.110
Chapter 5.2 --- Future works --- p.112
Chapter 5.3 --- References --- p.114
43
Peng, Hsin-Yi, and 彭欣誼. "Research and Development of a Biomorphic Robot Driven by Shape Memory Alloys." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/un4t32.
Full textAbstract:
碩士國立臺北科技大學
機電整合研究所
98
Thanks to the rapid development of robot technology in recent years, many achievements on the research of robot have been made. The industry and daily life both benefit from the robot technology. Among them, the biomorphic robotics is inspired by the principles of biological systems and can be applied to the improvement on technology. In this study, we use shape memory alloys as actuators to build a biomorphic robot which can imitate the motion of an earthworm. The robot can be used to explore in a narrow space. At present, most actuator employs electromagnetic motor which is in use with a designed mechanism, resulting in noise and EMI problems when operating. Shape memory alloys not only do not have above-mentioned defects, but also have characteristics such as small in size and light weight. Therefore we choose shape memory alloys as actuators. Because of the small deformation of a wire shape memory alloy, spiral shape memory alloys are selected and installed both on the X axis and Y axis(each axis having two shape memory alloys) to enable the biomorphic robot to do reciprocating motion. By the mechanism we designed, the robot can increase the distance as it moves in a duty cycle. In addition, two shape memory alloys are added to the head for controlling right and left turns. By sending pulses through the I/O card from the controller, the signals are then amplified by a driver to heat the shape memory alloys in order to make the SMA shrink to pull the mechanism to move.
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Liu, Pao-Hsin, and 劉保興. "Biomechanical and Biomorphic Effects of Orthopedic Force on the Mandible in Class III Malocclusion." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/55854432772359106950.
Full textAbstract:
博士國立成功大學
醫學工程研究所碩博士班
92
Overdeveloped mandible is one of the features in Class III malocclusion, but the significance of morphological variations in regional configuration of the mandible remains unclear. For Class III malocclusion with or without maxillary retraction, the orthopedic technique with chin cup appliance is frequently required to correct the mandibular prognathism. Class III subjects with a retrognathic maxilla and prognathic mandible could be improved intermaxillary skeletal disharmony by occipito-mental anchorage (OMA) appliance of maxillary protraction combined with chin cup for orthopedic treatment. The effects of orthopedic therapy on the mandible in Class III malocclusion have been investigated extensively through cephalometric analyses. However, the actual sites of skeletal change in the mandible are not detectable with conventional cephalometric analysis. The aims of this study were two folds. First, to investigate the mandibular morphological changes under orthopedic force by the integration of new geometric morphometric analyses, including: Procrustes superimposition, biostatistical estimation, thin-plate spline interpolation, and strain tensor analysis. Second, to analyze the biomechanical responses of orthopedic mandibular treatment under varied force magnitudes and directions with finite element (FE) analysis. Furthermore, the results of the morphological changes are linked with the biomechanical responses from FE analysis to establish the relationship between morphological change and stresses distribution under corrective forces. The results show that the strain tensor analysis effectively demonstrated the morphological differences of the mandible under orthopedic forces. The significant local deformations of size and shape changes were revealed at the region of chin, incisor alveolus as well as the upper portion of the ascending ramus. The growth directions (principal strain vector) of the Class III mandible was significantly redirected to the direction perpendicular to the long axis of general mandibular morphology after orthopedic therapy. The patterns of growth vectors on the Class III mandible were almost the same in both the chin cup and the OMA appliance therapies. Furthermore, the pretreatment effects (without Class III growth) in morphological changes were detected, using the after treatment shape to eliminate the natural growth of Class III mandible. From the finite element analysis of the three-dimensional mandible structure, it revealed that the direction of orthopedic force applied is more important than the magnitude of force. The key factor is the bending effect of the orthopedic force. The relationship between morphological change and stresses and strains distribution could not be identified in this study. The reason might be the simplistic assumptions of this FE pilot study in representing the mandibular biomechanical response to the orthopedic force. Moreover, it may be insufficient to obtain the correlation base on these two different methods especially when their dimensions are mismatch.
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"Synthesis and characterization of biomorphic titanium dioxide and study of its performance in photocatalysis." 2011. http://library.cuhk.edu.hk/record=b5894658.
Full textAbstract:
Ding, Zhimin = 遺態二氧化鈦的製備和表徵及其在光催化中的性能分析 / 丁志敏.Thesis (M.Phil.)--Chinese University of Hong Kong, 2011.
Includes bibliographical references.
Abstracts in English and Chinese.
Ding, Zhimin = Yi tai er yang hua tai de zhi bei he biao zheng ji qi zai guang cui hua zhong de xing neng fen xi / Ding Zhimin.
ABSTRACT --- p.i
摘要 --- p.iii
Acknowledgement --- p.v
Table of Contents --- p.vi
List of Figures --- p.ix
List of Tables --- p.xiii
Chapter Chpater 1 --- Introduction --- p.1
Chapter 1.1 --- Titanium dioxide --- p.1
Chapter 1.1.1 --- Lattice structure --- p.2
Chapter 1.1.2 --- Phase transition --- p.3
Chapter 1.1.3 --- Energy band structure --- p.4
Chapter 1.1.3.1 --- Band structure of titanium dioxide --- p.4
Chapter 1.1.3.2 --- Quantum size effect --- p.6
Chapter 1.1.4 --- Principle of photocatalysis --- p.8
Chapter 1.1.5 --- Improvement of the TiO2 photocatalyst --- p.10
Chapter 1.1.5.1 --- Noble metal deposition --- p.10
Chapter 1.1.5.2 --- Coiq)led semiconductor --- p.11
Chapter 1.1.5.3 --- Ion doping --- p.12
Chapter 1.2 --- Biomorphic materials --- p.13
Chapter 1.3 --- Cotton template --- p.14
Chapter 1.3.1 --- Composition of cotton --- p.14
Chapter 1.3.2 --- Cotton structure --- p.15
Chapter 1.4 --- Methyl orange --- p.16
Chapter 1.5 --- Objectives and thesis layout --- p.18
References --- p.19
Chapter Chapter 2 --- Methodology and Instrumentation --- p.27
Chapter 2.1 --- Sample preparation --- p.27
Chapter 2.1.1 --- Template and precursors --- p.27
Chapter 2.1.2 --- Synthesis of the Ti02-TTIP samples --- p.28
Chapter 2.1.2.1 --- Methodology --- p.28
Chapter 2.1.2.2 --- Fabrication procedures --- p.31
Chapter 2.1.3 --- Synthesis of the TiO2-TALH samples --- p.32
Chapter 2.1.3.1 --- Methodology --- p.32
Chapter 2.1.3.2 --- Fabrication procedures --- p.33
Chapter 2.2 --- Characterization --- p.33
Chapter 2.2.1 --- Scanning electron microscope (SEM) --- p.33
Chapter 2.2.2 --- Transmission electron microscope (TEM) --- p.34
Chapter 2.2.3 --- Raman spectroscopy (RS) --- p.34
Chapter 2.2.4 --- X-ray diffractometry (XRD) --- p.34
Chapter 2.2.5 --- Thermo gravimetric analysis (TGA) --- p.35
Chapter 2.2.6 --- Differential thermal analysis (DTA) --- p.36
Chapter 2.2.7 --- Ultraviolet-visible spectroscopy (UV-vis) --- p.36
Chapter 2.3 --- Photocatalytic performance --- p.37
Chapter 2.3.1 --- Lambert-Beer's law --- p.37
Chapter 2.3.2 --- "Verification of Beer,s Law" --- p.38
Chapter 2.3.3 --- Photocatalytic evaluation procedures --- p.39
Chapter 2.3.3.1 --- Glass beaker --- p.39
Chapter 2.3.3.2 --- Quartz vessel --- p.40
References --- p.41
Chapter Chapter 3 --- Results of Characterizations --- p.43
Chapter 3.1 --- Characterization of Ti02-TTIP --- p.43
Chapter 3.1.1 --- Effect of calcination temperature on the samples --- p.43
Chapter 3.1.1.1 --- DTA and TGA results --- p.43
Chapter 3.1.1.1.1 --- Pure cotton --- p.43
Chapter 3.1.1.1.2 --- Sol-infiltrated cotton --- p.45
Chapter 3.1.1.2 --- XRD results --- p.47
Chapter 3.1.1.3 --- Raman spectra results --- p.51
Chapter 3.1.1.4 --- SEM results --- p.54
Chapter 3.1.2.5 --- TEM results --- p.58
Chapter 3.1.1.6 --- UV-visible absorption spectra --- p.60
Chapter 3.1.2 --- Effect of calcination duration on the properties of samples --- p.61
Chapter 3.1.2.1 --- XRD results --- p.62
Chapter 3.1.2.2 --- Raman spectra results --- p.65
Chapter 3.2 --- Characterization ofTiO2 -TALH --- p.67
Chapter 3.2.1 --- DTA and TGA results --- p.67
Chapter 3.2.2 --- XRD results --- p.69
Chapter 3.2.3 --- Raman spectra results --- p.72
Chapter 3.2.4 --- SEM results --- p.73
Chapter 3.2.5 --- TFM rpcnltc --- p.76
Chapter 3.2.6 --- UV-visible absorption spectra --- p.78
References --- p.79
Chapter Chapter 4 --- Photocatalytic Performance --- p.81
Chapter 4.1 --- Verification of Beer's Law --- p.81
Chapter 4.2 --- Photocatalytic results --- p.82
Chapter 4.2.1 --- MO solution contained by glass beaker --- p.83
Chapter 4.2.2 --- MO solution contained by quartz vessel --- p.86
Chapter 4.2.3 --- Photocatalytic performance of TiO2-TALH sample prepared at 600°C --- p.90
Chapter 4.3 --- Discussions --- p.92
References --- p.94
Chapter Chapter 5 --- Conclusions and Future Works --- p.95
Chapter 5.1 --- Conclusions --- p.95
Chapter 5.2 --- Future works --- p.98
References --- p.99
46
Qiu, Guo-Yuan, and 邱國原. "Self-Adjusting Locomotion on a Partially Broken-down Quadrupedal Biomorphic Robot by Evolutionary Algorithms." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/44325867482248391195.
Full textAbstract:
碩士朝陽科技大學
資訊工程系碩士班
101
Traditional robots use the kinetic analysis to control the robot. kinetic analysis have big problems is not sense environment when robot works. Evolutionary robot using Evolutionary algorithm to solve this. Evolutionary robot have become an interesting topic recently. Specifically, this research focuses on evolution and learning. Evolution is the adaptation of robots to the environment. Learning is a task-oriented process whereby the robot gains the ability to achieve a given goal in the environment. we use many Evolutionary algorithm like GA algorithm, PSO (particle swarm optimization), and Memetic algorithm to control the robot. We use biomorphic robots to plan our experiments, biomorphic robots usually have more joints and more legs. However, the more motors on a robot the more risk that one of them might break down at an unexpected moment. Self-adjusting locomotion ability can be a help to make a partially dysfunctional biomorphic robot move. Online evolutionary algorithm is a promising way to achieve such a task. The robot receives feedback from the environment as to the fitness for its evolutionary goal. We adopt the PSO (particle swarm optimization), GA algorithm, and Memetic algorithm as our online evolutionary algorithm and test it on a partially broken-down quadrupedal biomorphic robot. The experimental results show that the robot can adjust its actions to move even when one leg is removed.
47
Chen, Hou-Yu, and 陳厚諭. "Automatic Adaptive Locomotion on Broken-down Quadrupedal Biomorphic Robot by Multi-Objective Evolutionary Algorithms." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/01595358770278671063.
Full textAbstract:
碩士朝陽科技大學
資訊工程系
102
In recent years, the robots gradually integrated into our lives. Traditional robots locomotion relied on the kinetic analysis to design a set of instructions to control the robot. When the surrounding environment changed, human had to develop a code of conduct to deal changes in the environment. Evolutionary robot using evolutionary algorithm to solve this problem, evolutionary robot can adapt its behavior to fit the current environment immediately, this is the advantage of evolutionary robots. Evolutionary robot research has become an interesting topic recently. Specifically, this research focuses on evolution and learning, evolution is adaptation of robots to the environment. Learning is a task-oriented process whereby the robot gains the ability to achieve a given goal in the environment. We use evolutionary algorithms like GA algorithm, MOIEGA (Multi-objective intergeneration exchange genetic algorithms), BRMA(Biomorphic Robot Memetic algorithm) to control the robot. Our biomorphic robots have four legs and each leg has several joints. We also test on a partially break down robot. When assigning task to the robot, the robot has to evolve to fit several indexes, so our study is a multi-objective evolutionary robotics. In our experiments, we set up a beacon light as a goal and the robot evolves to move quickly and smoothly toward the goal. We adopt online evolutionary algorithms and test them on the quadrupedal robot. The experimental results show that the robot can adjust its actions from totally random behaviors to move toward the goal quickly and smoothly.
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"Template-assisted synthesis of biomorphic MoO₃ compound and its catalytic effect on the degradation of methyl violet." 2010. http://library.cuhk.edu.hk/record=b5894422.
Full textAbstract:
by Diao, Zhenyu = 模板辅助下制备有生物形态的MoO₃化合物以及它对降解甲基紫的催化作用 / 刁振玉.Thesis (M.Phil.)--Chinese University of Hong Kong, 2010.
Includes bibliographical references.
Abstracts in English and Chinese.
by Diao, Zhenyu = Mo ban fu zhu xia zhi bei you sheng wu xing tai de MoO₃ hua he wu yi ji ta dui jiang jie jia ji zi de cui hua zuo yong / Diao Zhenyu.
Abstract --- p.I
摘要 --- p.II
Acknowledgement --- p.III
Table of contents --- p.IV
List of figures --- p.VII
List of tables --- p.X
Chapter Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Biomorphic materials --- p.1
Chapter 1.2 --- Semiconductor catalysts --- p.2
Chapter 1.3 --- Methyl violet --- p.3
Chapter 1.4 --- Photocatalysis --- p.4
Chapter 1.5 --- Synthesis of biomorphic catalysts --- p.8
Chapter 1.6 --- Objectives and thesis layout --- p.10
References
Chapter Chapter 2 --- Methodology and Instrumentation --- p.17
Chapter 2.1 --- Sample preparation --- p.17
Chapter 2.1.1 --- Synthesis --- p.17
Chapter 2.1.2 --- Paper templates and precursors --- p.18
Chapter 2.2 --- Characterization --- p.18
Chapter 2.2.1 --- Scanning electron microscope (SEM) --- p.18
Chapter 2.2.2 --- X-ray powder diffractometry (XRD) --- p.20
Chapter 2.2.3 --- Fourier transform infrared (FTIR) spectroscopy --- p.21
Chapter 2.2.4 --- Differential thermal analysis (DTA) --- p.23
Chapter 2.2.5 --- Thermogravimetric analysis (TGA) --- p.24
Chapter 2.2.6 --- Ultraviolet-Visible spectroscopy (UV-Vis) --- p.24
Chapter 2.3 --- Catalytic performance --- p.26
References --- p.26
Chapter Chapter 3 --- Results Introduction --- p.30
Chapter 3.1 --- Paper template --- p.31
Chapter 3.1.1 --- Thermal properties --- p.31
Chapter 3.1.2 --- Composition of paper template --- p.32
Chapter 3.1.3 --- Morphology of paper --- p.35
Chapter 3.2 --- Chemical precursors --- p.40
Chapter 3.3 --- Infiltrated paper templates --- p.43
Chapter 3.4 --- Biomorphic products --- p.46
Chapter 3.4.1. --- Influence of annealing temperature --- p.46
Chapter 3.4.1.1 --- Phase and composition --- p.46
Chapter 3.4.1.2. --- Surface morphology --- p.48
Chapter 3.4.2 --- Effects of annealing durations --- p.50
Chapter 3.4.2.1 --- Phase and composition --- p.50
Chapter 3.4.2.2 --- Surface morphology --- p.54
Chapter 3.5 --- Formation mechanism --- p.56
References --- p.57
Chapter Chapter 4 --- Catalytic performance Introduction --- p.59
Chapter 4.1 --- Degradation of MV under visible light --- p.60
Chapter 4-2 --- Effects of the UV irradiation on MV --- p.64
Chapter 4-3 --- Degradation of MV dye using M0O3 under UV light --- p.65
Chapter 4.4 --- Mechanism of photocatalysis --- p.69
References --- p.70
Chapter Chapter 5 --- Conclusions and future work --- p.72
Chapter 5.1 --- Conclusions --- p.72
Chapter 5.2 --- Future work --- p.73
References --- p.74
49
"Use of material and biomorphic form as a means to convey aspects of gendered and cultural identity constructs with emphasis on selected works by Nicholas Hlobo." Thesis, 2015. http://hdl.handle.net/10210/14019.
Full textAbstract:
M.Tech. (Fine Art)In this study, I explore the way in which materials and biomorphic forms are used in selected artworks to convey aspects of gendered and cultural identity constructs. This is done with specific reference to Nicholas Hlobo’s work and to the artwork I produce as part of the practical component of my research. I have chosen Hlobo’s installation Izithunzi (2009) because it is a pertinent example of the way in which he uses biomorphic form and typifies his use of materials, both of which have some similarities to my work. Although Hlobo’s use of materials is widely discussed in the available literature on his work, little has been written on his use of biomorphic form. To address this gap in the literature, I look specifically at how Hlobo uses biomorphic form in Izithunzi to represent what I argue to be the hybridity of his gendered and cultural identity. In the practical component, I present a series of sculptures made from second-hand furniture, polystyrene, concrete, plastic, stuffing, fabric, thread, steel pipe and fibreglass. As Hlobo does in Izithunzi, I consciously make reference to biomorphic forms.
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Moreira, João Pedro Oliveira. "Fabrico aditivo cerâmico em arquitetura: metodologia computacional para definição de um sistema de colunas." Master's thesis, 2018. http://hdl.handle.net/1822/58352.
Full textAbstract:
Dissertação de mestrado integrado em Arquitectura (área de especialização em Construção e Tecnologia)Nos dias de hoje não vemos apenas o processo de desenho em arquitetura mediado por ferramentas digitais, assistimos cada vez mais à experimentação e disseminação deste tipo de recursos em todos os estágios da construção, desde a concepção até à manufatura. Neste contexto, a associação de material cerâmico a fabrico aditivo representa, para a arquitetura, uma ampliação daquilo que é possível explorar através deste método e assim, devido às características do material, cria-se a possibilidade de explorar novas ideias e conceitos. O uso combinado de desenho computacional e fabrico digital em arquitetura apresenta um enorme potencial para melhorar e introduzir inovações ao desenho arquitetónico e ao ambiente construído. A associação destas ferramentas, permite não só explorar a produção em série de elementos singulares e personalizáveis, expandindo as potencialidades das técnicas tradicionais, mas também analisar determinados pressupostos, e com base neles, identificar a solução que melhor consegue atender a uma situação específica. A presente investigação procura avaliar a integração destas ferramentas digitais em arquitetura, incidindo especificamente sobre questões relacionadas com a produção de elementos estruturais personalizados, que se definem através de relações paramétricas de inspiração biomórfica, com recurso a fabrico aditivo cerâmico. Neste sentido, o caso de estudo procura desenvolver um sistema de componentes estruturais — um sistema de colunas — reticulados, personalizados e otimizados, com base em pressupostos definidos previamente. O processo de definição deste sistema é mediado por desenho computacional, implementando não só estratégias de análise e otimização estrutural, mas também características formais miméticas da natureza, criando um modelo que adapta os seus atributos formais, consoante os seus pressupostos e as restrições do material, resultando na definição de um conjunto de soluções que respondem ao problema de projeto proposto.
Nowadays, we not only see the design process in architecture mediated by digital tools, we also are increasingly witnessing the experimentation and dissemination of this type of resources at every stage of construction, from design to manufacturing. In this context, the association of ceramic material to additive manufacturing represents, for architecture, an extension of what can be exploited through this method, and thus, due to the characteristics of the material, it is possible to explore new ideas and concepts. The combined use of computational design and digital manufacturing in architecture presents an enormous potential to improve and introduce innovations in architectural design and the built environment. The association of these tools allows not only to explore the concept of standardized production of unique and customizable elements, expanding the potential of traditional techniques, but also allows an analysis of certain assumptions and, based on them, identify the solution that can best meet a specific situation. The present research aims to evaluate the integration of these digital tools in architecture, focusing specifically on issues related to the production of customized structural elements, which are defined through parametric relationships of biomorphic inspiration, using additive ceramic manufacturing. In this sense, the case study seeks to develop a system of reticulated, customized and optimized structural components, — a column system — based on previously defined assumptions. The process of defining this system is mediated by computational design, implementing not only structural and optimization analysis strategies, but also mimetic formal features of nature, creating a model that adapts its formal attributes, depending on its assumptions and the material constraints, resulting in the definition of a set of solutions that respond to the proposed design problem.