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Articles 481 - 483 of 483
Full-Text Articles in Engineering
Characteristics Of Pump Performance In Major Irrigated Areas Of California, Sierra A. Orvis Layous, Charles M. Burt, Luis P. Urrestarazu
Characteristics Of Pump Performance In Major Irrigated Areas Of California, Sierra A. Orvis Layous, Charles M. Burt, Luis P. Urrestarazu
BioResource and Agricultural Engineering
Well pump tests (12,876) in three Central California groundwater basins were characterized and described according to their spatial distribution. The average overall pumping plant efficiency (wire-water, not including column losses and velocity head) was about 56%. Characteristics such as drawdown, total dynamic heads, kW, and flow rate vary greatly between pumps within and between sub-basins. This is the first well pump characterization of its type in California, although irrigation pump tests have been conducted for over 70 years in California. This paper provides a summary of the spatial variation of well pump performance and characteristics.
The Effects Of Anti-Price Gouging Legislation On Supply Chain Dynamics, Jason Edward Maynard
The Effects Of Anti-Price Gouging Legislation On Supply Chain Dynamics, Jason Edward Maynard
Master's Theses
The purpose of this thesis is to model the effects of anti-price gouging (APG) legislation on the costs to businesses during the recovery period of a disaster. A system dynamics model of a business’s replenishment procedures is used to simulate the effects of APG legislation on business performance. Economists have published expansive research on the effects of price ceilings on supply and demand, but there is little research evidence on the operational consequences of price ceiling legislation on business costs. APG legislation increases consumer’s forward buying and shortage gaming after a disaster by removing price incentives to be frugal. Forward …
An Advanced Controller For A Semi-Active Wheelchair Suspension, David J. Smith
An Advanced Controller For A Semi-Active Wheelchair Suspension, David J. Smith
Master's Theses
An Advanced Controller for a Semi-Active Wheelchair Suspension was designed, built and tested. The suspension consisted of a Goodyear 1S3-011 air spring, IQ Valves high speed proportional solenoid valve, and a custom made accumulator. Several controller designs specific to semi-active suspensions were designed and tested. The controllers investigated were skyhook, acceleration driven damping, and a combined control law employing both a dual and single sensor version. The implementation of skyhook control suffered performance degradation from the idealization due to particular elements of hardware, however acceleration driven damping showed a marked and statistically significant improvement over skyhook control, in hardware, by …