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 117 for “"hold-up"”.
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Hold up : machine delay in architectural design
… of delay. These experiments in delay set up critiques of three contemporary architectural design approaches to digital fabrication. These critiques are supplemented by an examination of digital fabrication projects that have opened alternative contexts for architectural design research. …
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GAS HOLD-UP MEASUREMENTS IN 0.3 m DIAMETER BUBBLE COLUMN: EFFECT OF ELECTROLYTES
… work reports the axial, radial and temporal gas hold-up profiles in a 0.3 m diameter batch bubble column using a pair of Wire Mesh Sensors and six pressure transducers.</p>
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Application of electrical resistance tomography in evaluating the influence of nozzle design on the gas hold-up in boiling bubble column reactors
… of high rates of heat and mass transfer coupled with low operating and maintenance costs. The complex hydrodynamics brought about by the multiphase nature of such systems offer significant challenges in modelling, analysis and operation, thus making experimental measurement of system …
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Essays on Social Influences in Decision Making
… from a final online trust-game experiment support the posited mental-accounting mechanism for the effect. The third study, “Hold-Up Induced by Demand for Fairness: Theory and Experimental Evidence”, explores the domain of hold-up and fairness concerns. While recent research suggests that …
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Rheological effects on gas dispersion in a pilot scale mechanical flotation cell
… (as a result of the rotating impeller). Gas hold-up varied from 2 to 15% across all the ores tested. At low solids concentrations gas hold-up increased with impeller speed as expected. At moderate solids concentration gas hold-up was viewed to either increase/remain relatively constant with …
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Coalescence of secondary dispersions in fibrous beds
… as inlet drop size distribution, phase ratio, superficial velocity and the thickness and voidage of the bed . A recirculatory rig with interchangeable fibrous bed pads was designed and operated with toluene-water dispersions generated by a combination of centrifugal pumps . Inlet drop sizes were …
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Gas-liquid simulation of an airlift bubble column reactor
… which is represented by the parameters of gas hold up, contact surface area and gas superficial velocity. The simulation was verified by comparing the three different model results. Result shows the contact surface area increasing with behavior of bubble and gas hold up increases with …
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Liquid-liquid extraction in a pilot scale rotating disc contactor
… the relevant phenomena, such as droplet break-up and coalescence, drop mass transfer and axial mixing has been revjewed. Experiments were performed using the system C1airsol-350-acetone-water and the effects of drop size, drop size-distribution and dispersed phase hold-up on the performance of …
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Behaviour of Bubble Columns with Two and Three Phases
… conditions and phase properties on the gas hold-up, flow regimes, bubble dynamics and mixing in two- and three-phase systems. Complex two- and three-phase systems were also tested. Air, water and a variety of solid particles were used as the gas, liquid and solid phases respectively. More …
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Rigid or flexible accounting rules? : evidence from purchase price adjustments
… adjustment flexibility and to the prospect of hold-up. Estimates of the effect of rigid accounting on finalized purchase price adjustments are consistent with implications of the adverse selection and hold-up problems.
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An evaluation of defense contracting based on transaction cost theory
… that adverse selection, moral hazard, and hold-up problems exist within defense contracting. Based on the results of this study the transaction cost paradigm can be used as a framework for evaluating defense contracts and related problems. The results also indicate that hold-up problems and …
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The Behavioral and Neural Bases of Social Economic Decision-Making
… Chapter 2 examines how individuals react to hold-up when explicit promises are available. Hold-up happens when two parties can form an incomplete contract to cooperate, but the agreement may fall apart due to concerns about the other party gaining bargaining power. We propose that a …
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Agency conflicts in financial contracting with applications to venture capital and CDO markets
… capturing moral hazard, effort provision, and hold-up problems between entrepreneurs and investors. Across multiple financing scenarios we solve numerically for optimal decision policies and NPV, finding significant value losses from first-best. A commitment to competitive syndicate financing …
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Vibrations for improving multiphase contact
… of mass transfer coefficient and gas hold up were experimentally studied for the air-water system. Mass transfer coefficient enhancements up to 500% and gas hold-up improvements up to 200% were achieved under the application of low amplitude (0.5-2.5 mm) vibration at low frequencies …
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Product realization of the 2.007 control box
… I. A third generation control box that could hold up to 6 motors along with all the functional requirements of previous generations was designed and in the process of being built for future 2.007 classes and other engineering design classes around the world.
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Fundamental studies of heap leaching hydrology using magnetic resonance imaging
… for the novel non-invasive imaging of the liquid hold-up in representative laboratory-scale heap leaching systems. The ferro- and paramagnetic species in the ore were found to cause significant distortions in frequency encoded MRI acquisitions. These distortions were mitigated through the …
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A novel reactor with two independently-driven impellers for gas-liquid processing
… important mixing aspects such as mass transfer (hold-up, k\(_L\)a) and bulk blending (mixing times, circulation time distributions) were investigated and related to the power input from each impeller. At low gas rates, moderately increased hold-up and k\(_L\)a values were observed with the IDDIDT …
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Topology investigation of front end DC/DC converter for distributed power system
… digital system is available. It requires power supply with higher power density, lower profile and higher efficiency. PWM topologies have been widely used for this application. Unfortunately, hold up time requirement put huge penalties on the performance of these topologies. Also, high switching …
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