Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"natural material"”.
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Holzbau : timber construction and material information exchanges for the design of complex geometrical structures
… information everyday, what is it that our materials compute? Specifically, what are the bits of information registered within timber? More importantly, in this universe made of bits how do we design using this information and how do we imagine new buildings? This thesis explores the use of …
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Bamboo Housing: Building with Composites for Dignity and Longevity
… provides a cumulative study of bamboo as a natural material and building product through the lenses of architectural and product design, engineering, manufacturing, agriculture, material science, environmental science, history, and culture. All case study work is based in the context of …
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Use of uranium decay series for dating an archaeological smelting site
… dating is typically used on geologically old natural material, but the El Manchon slags were not suitable for other dating techniques. There are four requirements of uranium series dating: measurable presence of appropriate isotopes, cogenetic phases within the material, isotopic fractionation …
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Electrospinning of biphasic biopolymer and polymer : a feasibility and characterization study
Electrospinning of polymeric materials have been experimented to achieve nanoscaled diameters. The approaches to the current study are to combine a natural material such as collagen with synthetic materials and determine if the interactions between the materials can be used in the electrospinning …
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Synthesizing a Heparin Mimic Material Derived from Cellulose Nanocrystals
… from entering the bloodstream, a polymer-based natural material is being investigated. This materials properties include reduction of coagulation and elimination of the long-term effects of heparin such as heparin induced thrombocytopenia and osteoporosis. Cellulose nanocrystals (CNCs) contain …
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The potential of exosome-based gene therapy to eradicate glioblastoma cells
… gene therapies in cancer treatment due to their natural material transport properties, biocompatibility, and specificity in transporting cargo to the target cells. These extracellular vesicles have the additional advantage of being able to cross the blood-brain-barrier (BBB), which makes them …
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Grid Structure and Space
… the ancient times, people used various kinds of natural material to build architecture. Because of the characteristics of natural materials, there are many limits to challenge the possibility of the architectural structure.After the fire of 1871 in Chicago, there were many incentives to convince …
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Spider's orb web : implications of structural hierarchies to materials-based evolution
… component, the silk protein, is an exemplary natural material because its superior properties stem intrinsically from the synergistic cooperativity of hierarchically-organized components, rather than from the particular properties of the building blocks themselves. By bridging together …
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Water-based digital design and fabrication : material, product, and architectural explorations in printing chitosan and its composites
… little integration between shape formation and materialization resulting in disassociation between shape and matter. Contrarily, in the natural world shape and matter are structured through growth and adaptation, resulting in highly tunable and hierarchically structured constructs, which exhibit …
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Character-marked Furniture: Perceptions, Critical Issues, and Barriers to Acceptance Among Manufacturers and Retailers
… furniture based on environmental and natural material themes did not appear to hold much potential in the minds of manufacturers and retailers. It appears that promotion of character-marked furniture aimed at retailers will have to be based on what character-marks add to the look of …
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Chemical and physical effects of interaction between oilfield chemicals and formation rocks and integration with sand failure prediction models.
… the formation, which is derived mainly from the natural material that cements the sand grain and cohesive forces. The sand failure and production is a serious challenge that, if not properly handled, can have a drastic effect on oil and gas production rate, cause downhole and subsea equipment …
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The behaviour of a structurally complex clay from an Italian landslide
… As a result of the tectonic history of these materials, they have a bonded micro-structure consisting of composite particles of clay minerals and a fissured macro-structure. The behaviour of these soils was investigated using S.E.M., Atterberg limit, triaxial and ring shear tests in the …
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Total synthesis of polycyclic natural products : synthetic studies on (+)-ineleganolide, (–)-sinulochmodin C, verrillin hydrate, and aleutianamine.
Polycyclic furanocembranoid natural products are a broad and diverse class of marine and terrestrial natural products that have captured and held the attention of the synthetic and biomedical communities for nearly three decades. Their daunting polycyclic molecular architectures, coupled with …
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Leather inspection and characterization using non-destructive techniques
… and other leather goods. Because it is a natural material, a tanned hide will contain visual and hidden flaws. In addition, its mechanical properties vary over the hide. At present, hides are inspected and assessed by skilled operatives. Further, current objective leather testing requires …
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Tunable mechanical bandgaps in elastic metamaterials: Patterning, straining, and spatiotemporal modulation
Metamaterials are novel engineered composites with special microstructural patterns that lead to uncommon macro properties compared to natural material systems. In this work, we first present a novel mechanism for evolving the elastic band gap structure in a bio-inspired composite through tension …
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Bioinspired algorithmic-driven design of additively manufactured composites
… it comes as no surprise that biological materials are identified as invaluable sources of inspiration in the search for new materials. Bone, teeth, and spider silk, to name a few, are high-performing biological composites that possess impressive mechanical properties unmatched by their …
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Design and manufacturing of all-dielectric optical metamaterial with gradient index of refraction
Gradient index (GRIN) materials offer the most general manipulation over wave fields of light compared to conventional refractive optics, where the light is deflected by the curved surface. The creative way to implementing GRIN optics is to construct a subwavelength structure with the …
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New composite coagulant from agro-waste (tapioca peel) and polyaluminium chloride for primary landfill leachate treatment
… Hence, this leads to the application of natural material (tapioca peel powder (TPP)) originated and recycled from agro-waste in this study. The limited ability of TPP as a single coagulant could be overcome by substituting the material into polyaluminium chloride (PAC) as a composite …
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Aspects of Folate and Tetrahydrofolate Chemistry and Metabolism in the Rat
… commonly used for extraction of folate from natural material. In presence of antioxidant, little decomposition was found apart from the expected formyltetrahydrofolate interconversions. Folic acid and 5-methyltetrahydrofolate were photolysed in the presence and absence of riboflavin. An …
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Microstructural Engineering of Titanium-Cellulose Nanocrystals Alloys via Mechanical Alloying and Powder Processing
… concerted efforts have been made to improve the material and to reduce the cost of production. In this thesis, titanium is mechanically alloyed with cellulose nanocrystals followed by powder consolidation and sintering to form a solid titanium metal matrix composite. Cellulose nanocrystals (CNCs) …
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