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.
Results
Showing 1 to 20 of 234 for “"macro-scale"”.
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Macro-scale space systems for geoengineering
There are many pressures facing the future of human presence on the Earth. These are the effects of a changing climate and the finite resources of Earth. This thesis sets out several space-based scenarios that can be implemented to reduce these pressures, namely space-based geoengineering to offset …
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Microbial-Induced Calcium Carbonate Precipitation: from micro to macro scale
… PhD study investigates MICP at both micro and macro scales to improve the micro-scale understandings of MICP which can be applied at the macro-scale for improving the homogeneity and mechanical properties of MICP-treated sand. A microfluidic chip which models a sandy soil matrix was designed …
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Charge Transport in Organic Electronic Devices: From Nano to Macro-Scale
… and the fabrication procedures. The length scales of interest can also vary widely, ranging from a few nanometers in the case of charge transport through single molecules or two-dimensional molecular ensembles, to tens of micrometers in devices focusing on thin films or molecular crystals. …
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Macro-scale investigation of high speed gas bearings for MEMS devices
A macro-scale experimental test facility for investigating high-speed gas bearings for MEMS devices such as the MIT Micro-Engine is presented along with results from subsequent experiments. It is shown that the bearings required by such MEMS devices fall outside the usual range of design parameters …
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Modeling Macro-scale Clay Behavior at Micro-scale Clay Particle Interfaces
… has generally been considered from a macro-scale perspective by measuring the macro-scale compression of a clay soil over time. Clay particles in consolidation tests experience shear and normal forces at the inter-particle level due to force applied to the soil at the macro-scale. …
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Macro scale physical model of nanoindentation on vertically aligned carbon nanotube forests
… of determining the elastic modulus of CNTs, a macro scale physical model was built using cylindrical rods of a known material and used to help explain some of the interactions of the tubes and indenter. Two models and two indenters were built to explore these effects and how they changed …
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Auto-tuning on the macro scale : high level algorithmic auto-tuning for scientific applications
In this thesis, we describe a new classification of auto-tuning methodologies spanning from low-level optimizations to high-level algorithmic tuning. This classification spectrum of auto-tuning methods encompasses the space of tuning parameters from low-level optimizations (such as block sizes, …
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From local and bulk structure-flow correlations to macro-scale transport properties with MRI: applications using deformable porous media and deep learning
… with strain due to long-range heterogeneities. Macro-scale heterogeneities introduced by differential compaction were examined using one-dimensional (1D) spatially resolved MRI propagator measurements. It was also shown that strain intensifies the power law dependence of dispersion on Péclet …
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What feasible macro-scale interventions could stimulate a sustainable growth in the UK housing retrofit industry? - An examination of the potential impact from supply-chain innovations on low energy retrofit of pre-1919 housing
Understanding the context for encouraging new retrofit practices to be applied to domestic housing in the UK is of crucial importance to any consideration of what could impact on energy reduction and domestic housing costs within the wider UK housing market.<br/><br/>The thesis reviews attempts …
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Dynamic study of tunable stiffness scanning microscope probe
… element analysis (FEA) methods for the micro scale device and its macro scale counterpart, which was designed specifically for this study. Experimental system identification testing using sound wave and high-speed camera recordings was clone on the macro scale version to identify trends that …
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Adaptive Learning and Prediction of Multiscale Dynamical Systems
… indispensable tool for analyzing complex, multiscale systems in a wide range of scientific and engineering disciplines. In many such systems, the governing dynamics occur at the micro scale, whereas quantities of interest manifest themselves on orders of magnitude larger macro scale. To reduce …
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Molecular dynamics simulation of mechanical behavior of nanoporous copper foams
… little is known about foam behavior on the nano-scale. To determine if macro-scale metallic foam theory scaled appropriately to nanoporous foams, the mechanical behavior of nanoporous copper was simulated. Molecular dynamics (MD) simulations were performed at room temperature using the Mishin …
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Turbulence and macro-turbulence in the bottom boundary layer downstream of large-scale bedforms; implications for sediment transport
Effects of large-scale topographic features on the benthic boundary layer (BBL) flow characteristics and on sediment transport are analysed in a natural shallow coastal site and in a laboratory flume. The main signature of flow/bedform interaction processes consists of large scale flow structures, …
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Mechanical Characterization and Modeling of Solid Oxide Fuel Cell Electrolytes with Honeycomb Support
… geometry is characterized at various length scales using a two-scale finite element model. The smaller, meso-scale model is used to obtain homogenized equivalent properties which are used as material inputs for the macro-scale. Stresses at the two scales are related via a scalar magnification …
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Micro architecture : architecture for daily social activities within Beijing's hutongs
… derives from the Micro Urbanism in the micro-scale realm in the Asian main cities. Based on the Micro Urbanism, the project is to propose a system of micro architecture that provides ubiquitous ideal public spaces for local inhabitants' daily social activities within Beijing's 25 …
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Fast Power Converters and Rapid Digital Design
… design has revolutionized workflows in macro-scale engineering projects. Digital control facilitates bottom-up workflows where hardware, software, and design teams can work independently. These new workflows are tested for sending power into the utility grid on the Grainger Center …
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Identification of the key urban facilities management principles of a sustainable urban precinct: A case study of Ebene Cybercity, Mauritius
… the need for the study of FM principles at a macro scale. Design/methodology/approach - Using the case study methodology, the research used the case of Ebene Cybercity and adopted a social constructionist, interpretivist framework. Qualitative data was collected using face-to-face interviews …
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Multiscale Modelling of Cancer Response to Viral Therapy
… In this work, we present a novel multiscale moving boundary modelling for the tumour-OV interactions, which is based on cou- pled systems of partial differential equations both at macro-scale (tissue-scale) and at micro-scale (cell-scale) that are connected through a double feedback …
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Design of nanomanufacturing systems
… the integration of a machine tool enabling macro-scale processes (milling, turning, welding, water-jet cutting) into a production or manufacturing line, and this thesis seeks to provide a design engineer with the insight so that the same can be done for a nano-scale process such as Dip Pen …
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