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 52 for “"Material transport"”.
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Material transport on oscillating conveyors.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1967.
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Material transport system design in manufacturing
This dissertation focuses on the material transport system design problem (MTSDP), integrating decisions of technology selection and flow network design. This research is motivated by the design of material transport systems (MTS) in manufacturing plants. The objective is to design a MTS with …
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Aspects of material transport and polycrystal growth in fractures
… a self-designed see-through apparatus. Analogue material is used to visualize and model sealing processes on a microscale, which is quantified with a numerical model and extended to fracture sealing of quartz. Chapter 3 describes hydrothermal fracture sealing experiments at hydrothermal …
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Material transport and reaction effects in surface typography evolution during plasma etching
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1995.
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Particle breakage and material transport in the design of high-efficiency comminution device
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1991.
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Evaluation of the Interaction Between Flow Turbulence and Corrosive Material Transport Around Bridge Piers
… their effects on vortex formation, sediment transport, and long-term structural performance. A three-phase experimental approach was adopted: (1) Acoustic Doppler Velocimeter (ADV) measurements quantified average velocities and turbulence parameters around three-square piers, revealing …
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Evaluation of the Interaction Between Flow Turbulence and Corrosive Material Transport Around Bridge Piers
… their effects on vortex formation, sediment transport, and long-term structural performance. A three-phase experimental approach was adopted: (1) Acoustic Doppler Velocimeter (ADV) measurements quantified average velocities and turbulence parameters around three-square piers, revealing …
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Unifying multi-source data and modeling perspectives to investigate connectivity and material transport in coastal river deltas
… Lagrangian model dorado to simulate patterns of material transport for a diverse range of materials in deltas. We quantify the magnitude of fluvial nourishment and connectivity by material, discharge conditions, and tidal conditions, and find that even small differences in local material …
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The Impacts of Climate and Landscape Change on Catchment Scale Material Transport in High Mountain and Seasonally Cold Regions
… stream systems. This dissertation investigates material fluxes at the watershed scale in high mountain and seasonally cold regions in an effort to better understand the processes impacting their magnitude, timing, and release and the broader implications for the management of water resources. …
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Quasi-Elastic Light Scattering Diagnostics for a High Voltage Spark Discharge
… was used as a diagnostic probe into analyte material transport processes in a unipolar, positionally stable, high voltage spark discharge. The material transport by particulate intermediates was studied. Instrumentation was constructed to allow spatially-, temporally-, and angularly-resolved …
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Prediction, analysis, and learning of advective transport in dynamic fluid flows
Transport of any material quantity due to background fields, i.e. advective transport, in fluid dynamical systems has been a widely studied problem. It is of crucial importance in classical fluid mechanics, geophysical flows, micro and nanofluidics, and biological flows. Even though mathematical …
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Controlling the cooperative behavior of a system of autonomous mobile robots
A novel material transport system is presented that uses 'swarms' of small autonomous mobile robots to collectively lift and move palletized loads. The robots are relatively unsophisticated in design and have no advanced sensory or communications capability. There is no central or supervisory …
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Transport of Molecular Cargoes By Coordination Cages Between Immiscible Liquid Phases
Directed transport of materials against chemical potential gradients is a fundamental feature of living systems, underpinning processes that range from transport through cell membranes to neurotransmission. The development of artificial active cargo transport could enable new modes of chemical …
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Orientierungsabhängigkeit und Größeneffekte bei der Nanoindentierung von Einkristallen
… effect could not be shown. Instead, for these materials (NiAl, magnesium) the measured hardness value varied depending on the sample orientation. Furthermore, for the Fe-3%Si samples a different hardness value of the (001) orientation compared to the other investigated sample orientations was …
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Materials and devices for optical switching and modulation of photonic integrated circuits
… necessitates the development of new devices and materials capable of achieving miniaturization and integration on a CMOS compatible platform. Optical switching: fast modulation and add-drop switches, key components in a PIC, were investigated. A MEMS-based approach was utilized to control …
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Cutter, carriers and bucket brigades ...
… of fragment size, (b) the effect of load size on transport economics, (c) division of labour and task-partitioning. Grass-cutting ants, Atta vollenweideri, harvest grass fragments that serve as substrate for the cultivation of a symbiotic fungus. Foragers were observed to cut grass fragments …
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Using the Circular Restricted Three-Body Problem to Design an Earth-Moon Orbit Architecture for Asteroid Mining
… and technical challenges exist with the material transport of natural resources in space. One aspect of this transport problem is the design of an orbit architecture in the Earth-Moon system (EMS) that facilitates these resources through the mining cycle. In this thesis, it is proposed to …
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Towards Detecting Atmospheric Coherent Structures using Small Fixed-Wing Unmanned Aircraft
… Coherent Structures (LCS) enables prediction of material transport by turbulent winds, such as those observed in the Earth's Atmospheric Boundary Layer. In this dissertation, both theory and experimental methods are developed for utilizing small fixed-wing unmanned aircraft systems (UAS) in …
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Practical Perspectives on Spent Nuclear Fuel Transportation Risks
Transportation of spent nuclear fuel is essential for relocation of used fuel assemblies from temporary storage facilities to a geological repository. There has been a great deal of publicized concern over the hazard of shipments of radiological materials in recent years due to the proposed Yucca …
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TEM-Untersuchungen zum Gefüge und zu mechanischen Spannungen in Metallisierungen für SAW-Bauelemente
… intrinsic stresses result in a stress induced material transport, called acoustomigration. These microstructural changes can destroy the characteristic of the SAW device. Different Al based material combinations were investigated by different authors to improve the reliability of the …
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