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 20 for “"Hierarchical assembly"”.
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Hierarchical Assembly of Polymeric Nanofibers for Advanced Material Applications
Polymer nanofibers are gaining importance due to their wide applicability in diverse fields, such as tissue engineering, fuel cells, photonics and sensors. For these applications, manufacturing aligned polymer nanofibers with precisely controlled morphology and well characterized mechanical …
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Hierarchical Assembly Strategy and Multiscale Structural Origin of Exceptional Mechanical Performance In Nacre
<p>Nacre (mother of pearl) is a self-assembled hierarchical nanocomposite in possession of exquisite multiscale architecture and exceptional mechanical properties. Previous work has shown that the highly-ordered brick-mortar-like structure in nacre is assembled via epitaxial growth and the …
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Molecular structure, hierarchical assembly and stimuli-responsive mechanics of tropoelastin and elastin biomaterials
… associated with mutations therein, and assembly process, to replicate natural function upon impairment. From the materials perspective, elastin-based materials display tunable thermal sensitivity, presenting opportunities to mimic and control these responsive features for biomedical …
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Understanding the Milky Way with Stars
… most important questions in modern astrophysics. Hierarchical growth, the most plausible theory behind galaxy formation, suggests that galaxies, including the Milky Way, assemble through the accretion of smaller systems, over a scaffolding of the invisible Dark Matter. Such growth is evidenced by …
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Fabrication and control of microfluidic devices for on-chip synthesis
… longer chains, in a repeating process known as hierarchical assembly.
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Designing Amphiphilic Peptoids for Controlling the Formation of Nanostructured Biomimetic Materials
… sequences, enabling sophisticated folding and hierarchical assembly. However, their complexity and sensitivity in folding and assembly raise significant challenges for molecular design and limit broader applications. Peptoids, or poly-N-substituted glycines, are a versatile class of peptide …
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Automated motion planning for robotic assembly of discrete architectural structures
… this gap, this research presents a new robotic assembly planning framework called Choreo, which eliminates human-intervention for parts that are typically arduous and tedious in architectural robotics projects. Specifically, Choreo takes discrete spatial structure as input, and then assembly …
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ON METAL ABUNDANCE AND ENTROPY OF THE ICM: THE TWIN TRACERS OF BARYON EVOLUTION IN GALAXY CLUSTERS
… in massive clusters, in a regime where the hierarchical assembly drives the ICM properties, while non-gravitational effects are minimised. We selected 32 very massive (M500 > 7.75e14 Msun) systems from the CHEX-MATE sample and measured their entropy profiles out to their outer regions. The …
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Designing dynamic mechanics in self-healing nanocomposite hydrogels
… a nanocomposite hydrogel network (NP gel) with hierarchical assembly of polymer chains on iron oxide (Fe3O4) nanoparticles as network crosslinks. With NP gel as a model system, we first investigated its unique dynamic mechanics in comparison with traditional permanent and dynamic gels, and …
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Design for adaptability
… adaptability. Such a system would consist of a hierarchical assembly of autonomous functional modules, emulating the adaptable architecture of a ‘rational functional structure’. Methods and guidelines are proposed for making the design of mechanical systems closer to this ideal architecture. …
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Recursive Robotic Assemblers
… might consider cell division as another type of assembly process: as the size scale of the assembled parts grows, the assemblers also grow. This represents a recursive and hierarchical assembly process. In contrast, current robotic and CNC construction processes, though often parallelized, are …
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The role of type I collagen heterotrimers and homotrimers in mechanical strength and collagen cleavage
… a crucial structural protein, formed through a hierarchical assembly of molecules, arranged in collagen fibrils, which constitutes the basis for larger-scale fibers. Normal type I collagen is a heterotrimer triple-helical molecule consisting of two alpha-1 chains and one alpha-2 chain. A mouse …
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Rapid, Efficient and Versatile Strategies for Functionally Sophisticated Polymers and Nanoparticles: Degradable Polyphosphoesters and Anisotropic Distribution of Chemical Functionalities
… applications.</p><p>Inspired by the many hierarchical assembly processes that afford complex materials in Nature, the construction of asymmetrically-functionalized nanoparticles with efficient surface chemistries and the directional organization of those building blocks into complex …
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Improvement in mechanical properties through structural hierarchies in bio-inspired materials
… softening them by up to 90% of bulk silica. Hierarchical assembly of silica structures is then used to regain the stiffness lost due to nanostructuring while not losing their improvement in toughness. Finally, improvement in toughness with several levels of hierarchy is studied, to showcase a …
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Mathematical Model of the Cell Cycle Control and Asymmetry Development in Caulobacter crescentus
… of CtrA. We propose a mathematical model for the hierarchical assembly of ClpXP complexes, together with modeling DNA replication, transcription, and protein interactions, to characterize the Caulobacter cell cycle. Our model suggests that the ClpXP-based proteolysis system contributes to the …
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The stellar halos of Milky Way type galaxies in the EAGLE simulations
… of galaxies which have been built up through hierarchical assembly, their content and structure is directly tied to the material that was accreted onto them over the course of the galaxy's life. This thesis presents the results of a study into the stellar halos of Milky Way (MW) type galaxies …
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KNOWLEDGE-BASED MODELLING FOR OFFSHORE HEAVY LIFT DESIGN
… which utilizes a tree structure to represent the hierarchical assembly structure as well as the locational dependencies amongst the components of the structure, is important for top-down approach in heavy lift design. The combination of these representations forms the geometric modelling backbone …
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Applications of yeast display in synthetic biology with a focus on biological synthesis and recycling of plastics
… utilizes type IIS restriction enzymes for the hierarchical assembly of expression vectors from standardised parts into Saccharomyces cerevisiae expression cassettes. In Chapter 3, to facilitate the use of this toolkit for yeast surface display experiments, parts that allow for the incorporation …
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Non-lithographic and scalable manufacturing of silicon micro & nanomaterials
… - such as 2D and 3D printing, imprinting, self-assembly, deterministic micro-assembly, flexography, and roll-to-roll systems - are among a growing set of new platforms that allow for integration of metals, polymers, oxides, composites, nanomaterials and biomaterials hierarchically across length …
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Chemical and kinematical evolution in nearby dwarf spheroidal galaxies
… evidence has been mounting that this idea of hierarchical assembly may be too simplistic a picture, since a number of the dSphs' characteristics, such as the a-element abundance patterns, stand in contradiction to the properties of stars in the Galactic halo. Further, yet unsolved, puzzles …