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 82 for “"Low-load"”.
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Low load operation of turbine-driven boiler feed pumps
… stations to run for extended periods at very low loads has arguably never been this great. Various systems affect the ability of these generation units to run economically at low loads. One such system is the boiler feed pump turbine and its associated pumps. A station was selected from …
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Boiler feed pump low load – leak off recirculation study
… may experience cavitation and overheating at low load and start-up conditions. These plants make use of a leak off or recirculation system that diverts some of the flow back to the feed water tank, ensuring that a minimum flow through the pump is maintained at low load and start-up operating …
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Design and use of a fixed-end low-load material testing machine
The purpose of this low-load material testing machine is to provide students an opportunity to perform basic material tests on their own instead of watching a lab technician, thus improving the student's lab experience. The machine proposed is small, low cost, and easy to manufacture, assemble, and …
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Microstructural analysis of plasticity in low-load contact damage of silicon and germanium
… in silicon and germanium subjected to low-load contact damage have been investigated. Microstructural characterization has been carried out primarily by electron microscopy and electron diffraction. The particular contact damage processes that have been studied are indentation, …
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Low load endurance activity and green tea extract represent potential therapies for Duchenne muscular dystrophy
Duchenne muscular dystrophy (DMD) is a progressive muscle wasting disease affecting 1 in every 3500 boys. The disease is characterized by the absence of the dystrophin protein from the sarcolemma of muscle cells. Muscle cells lacking dystrophin go through cycles of degeneration and regeneration and …
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Integrated process and control modelling of water recirculation in once-through boilers during low load and transient operation
Power plant stability at lower loads is becoming ever more important, highlighting the increasing requirement for the development of advanced models and tools to analyse and design systems. Such tools enable a better understanding of the thermo-fluid processes and their dynamics, which improves the …
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Sliding friction between some commercial polymers under low load and velocity conditions in the limit of zero wear
Thesis: M.S., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 1986
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Acute Cardiovascular Response to Low-Load Unilateral, Bilateral, and Alternating Resistance Exercise with Blood Flow Restriction in the Lower Body
<p>Resistance exercise with blood flow restriction (BFR) has been suggested to exaggerate the exercise pressor response over traditional non-BFR exercise. While applying BFR relative to an individual’s arterial occlusion pressure (AOP) and exercising at low-loads seems to produce a comparable …
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The effect of acute low-load resistance exercise with the addition of blood flow occlusion on muscle function in children and adults
… to increase muscular strength suggest using high loads. However, some individuals cannot withstand high mechanical stress. Thus, in adults, low-load training is used with blood flow occlusion (BFO), to mimic strength increases from high-load training. Due to differing physiological responses to …
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Acute and chronic skeletal muscle response to very low load resistance exercise with and without the application of blood flow restriction in the upper body
… of resistance exercise with and without blood flow restriction (BFR) on skeletal muscle. Methods: The acute study examined changes in torque, muscle thickness (MTH), and surface electromyography (EMG) in response to resistance exercise with high load [70% 1RM,(7000)], low load [15% 1RM,(1500)], …
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Integrated network-based thermofluid model of a once-through boiler at full- and part-load
… plants need to operate intermittently or at low load for extended periods. Existing CFPPs are designed to operate at a steady baseload. Operating at these off-design conditions increase the risk of damaging the boiler's thick-walled components, leading to reduced life expectancy and/or …
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The Blood Flow and Perceptual Response To Lower Body Resistance Training With and Without Blood Flow Restriction
<p>The muscular response to low-load resistance exercise in combination with blood flow restriction (BFR) is well studied but less was known about the cardiovascular response. It was also unknown what impact resistance exercise at 15% 1RM with or without BFR would have on the acute and chronic …
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Restaurant revenue management
… industry practice of FCFS by 0.11% to 2.22% for low load factors, by 0.16% to 2.96% for medium load factors, and by 7.65% to 13.13% for high load factors, without increasing and occasionally decreasing waiting times compared to FCFS. The second class of models addresses reservations. We propose a …
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Kinematic alignment of precision robotic elements in factory environments
… However, these devices have been limited to low load and clean environments such as in semiconductor manufacturing facilities. While traditional factory environments present less ideal conditions for the implementation of kinematic couplings, the benefits of more repeatable, deterministic …
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Sources and characteristics of oil consumption in a spark-ignition engine
(cont.) At low load, oil flowing past by the piston was found to be the major consumption source, while the contributions of oil evaporation and of blowby entrainment became more significant with increasing engine load. Furthermore, an extensive study was conducted to measure and analyze the oil …
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Managing transient behaviors of a dual mode spark ignition-- controlled auto ignition engine with a variable valve timing system
… into two topics. First, the dynamic nature of load trajectory and several important phenomena in CAI mode were investigated. Second, the issues encountered during mode transition between SI and CAI regime were considered. Despite wide-open-throttle operation, pumping loss in CAI mode was not …
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Characterization of oil transport in the power cylinder of internal combustion engines during steady state and transient operation
… Based on experimental observations, major oil flow patterns in the piston ring pack during transient operation were identified and characterized. Physically based models were used to describe and understand the fundamentals of the individual oil transport process. The work shows oil may enter …
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Optimizing conventional combustion and implementing low-temperature combustion of biodiesel in a common-rail high-speed direct-injection engine
… effects on engine emissions. Tests were run at low to moderate engine load at different engine speeds. It was found that with the ECM’s default settings, higher blends of biodiesel tended to result in higher NOx emissions and lower soot emissions, in line with previous studies. It was also found …
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Acute and Chronic Vascular Responses to Blood Flow Restriction in the Upper Body
Blood flow restriction (BFR) with low load exercise increases muscular size and strength. Little is known of vascular adaptations to this training modality, and nothing was known at very low loads. These studies examined cardiovascular responses to high load (70% of one-repetition maximum (1RM)) …
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The Biomechanics of the Perinatal, Neonatal and Pediatric Cervical Spine: Investigation of the Tensile, Bending and Viscoelastic Response
… cervical level injuries compared to increased lower level cervical injury patterns to older children. The majority of pediatric cervical spinal injuries are motor vehicle crash related. Current progress in child occupant protection, including increased and proper restraint usage continues to …
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