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 41 for “"spares"”.
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Dietary guanidino acetic acid spares arginine and dietary l-homoserine spares threonine in the chick
Guanidino acetic acid (GAA) is synthesized in the liver and kidney from Arg and Gly. It is subsequently methyllated by S-adenosylmethione to creatine. L-Homoserine (HS) has been identified as an intermediate compound in the metabolism of Thr, Met, and Asp. Bacteria, plants and yeast can synthesize …
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The spares provisioning problem with parts inventory
In this research, we consider the spares provisioning problem, where a finite population of homogeneous machines are being deployed to meet a constant demand. While a machine is operating, it could become inoperable due to the failure of a critical built-in part in the machine. Before repairs on …
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Insurance spares, safety equipment and spare parts on ships
… that certain minimum safety equipment and spares be carried aboard any ship for the purpose of safety at sea, but do not prescribe what these should be. Each ship operator, such as this company, based on its risk profile, decides what safety equipment and spares will form part of the ship. …
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Insurance spares, safety equipment and spare parts on ships
… here comprises essential safety equipment and spares included in a ship at the time of its construction prior to commissioning and its maiden voyage. If such expenditure is considered not to form part of the cost of a ship, should it in the alternative be deducted as operating expenditure? …
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Forecasting and strategic inventory placement for gas turbine aftermarket spares
This thesis addresses the problem of forecasting demand for Life Limited Parts (LLPs) in the gas turbine engine aftermarket industry. It is based on work performed at Pratt & Whitney, a major producer of turbine engines. The author worked in the Global Materials Solutions program, Pratt & Whitney's …
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Any spares? I’ll buy or sell: an ethnographic study of black market ticket sales
This thesis contributes to the limited knowledge on ticket touting and ticket touts. Building on the previous research, mainly produced before online touting, this work offers new insight into the backgrounds, motivations, experiences and justifications of individuals belonging to the “deviant” …
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Improving maintenance work flow processes in a volatile assembly factory environment : maintenance people and processes, spares inventory, and equipment reliability
Many manufacturing companies face significant challenges in maintaining their factory equipment in a cost efficient manner so as to provide reliable production capacity. CEI (Consumer Electronics, Inc., a pseudonym for an electronics marketing, sales, and assembly company that this work is based …
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Quantitative probabilistic modeling of environmental control and life support System resilience for long-duration human spaceflight
… before the end of mission and the number of spares for each component that are required to achieve a certain probability of success. This methodology is demonstrated on a notional ECLSS, and then used to determine logistics requirements for a Mars One surface habitat Life Support Unit and …
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Applications of risk pooling for the optimization of spare parts with stochastic demand within large scale networks
… However, if Amazon is able to pool its spares across multiple FCs, it has an opportunity to reduce the spares kept across the entire FC network, position itself to better respond to catastrophic failures, and consolidate interfaces with suppliers. The goal of this thesis is to identify …
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Modeling and Optimization of In-Space Manufacturing to Inform Technology Development
… studies of interest. For the case of on-demand spares manufacturing, the results indicate that the maximum possible spares mass savings for a 0.45 m^3 ISM facility is limited to 52% by build volume constraints alone. For the case of ISM solar arrays, the results reveal that a state-of-the-art …
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Supportability for the V-22 Osprey
… specific requirements including training, spares, and the contracting options that will be necessary to support the overall weapons system from "tip to tail".. This report also includes potential outliers or issues related to the current plan. The benefit of choosing a commercial support …
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Design of a Transforming MTB Helmet
… extra storage space in which to stow parts or spares which are not in use, increasing the risk of losing, misplacing, or damaging removable parts.
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Asymptotic Analysis and Performance-based Design of Large Scale Service and Inventory Systems
… Decisions for the Machine Repair Problem with Spares,&rdquo I study the M/M/R machine repair problem with spares. This system can be represented by a closed queuing network. Applications include fleet vehicles' repair and backup capacity, warranty services' staffing and spare items investment …
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The effect of tool sharing on reliability of flexible manufacturing systems.
… influences of tool sharing on cost, reliability, spares requirement, and tool magazines capacity of FMSs, in which tools and tool transporter are subject to general failure distributions, were analyzed. The developed models have been applied to a hypothetical example and the computational results …
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Fault-tolerant ring embeddings in hypercubes -- A reconfigurable approach
… hypercube. The remaining nodes can be used as spares to reconfigure the embeddings in case of faults. The result of this research shows that by carefully embedding the application graphs, the topological properties of the embedding can be preserved under fault conditions, and reconfiguration …
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Contemporary perceptions of music piracy in South Africa
… partake in music piracy. Illiteracy, much as it spares music piracy as a large number of people are not able to operate the internet for illegal downloading of music, a certain percentage still turn to pirating music for sustenance. Also, a substantial number of illegal immigrants, seeking jobs …
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Commonality analysis for exploration life support systems
… cost of the necessary equipment, the mass of spares required by the equipment, and the number of unique items to be developed at various Technology Readiness Levels. Based on these analyses, recommendations for further technology development and appropriate commonality levels in future …
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Automation techniques for short interval scheduling in a complex manufacturing environment
… parts and assemblies for both assembly and spares business lines. Accurate scheduling is crucial for meeting demand and the on time delivery of parts, a key driver of customer satisfaction. Managers currently use a manual process to generate a short interval schedule for production in this …
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A simulation-based decision support system for finite population maintenance logistics
… as population availability, maintenance costs, spares requirements and repair facility utilization. Output data are available in several forms for use in external analyses.
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Effects of three presentation formats in a PSI college level bowling course
… information related to converting common spares during the spare conversion unit of a beginning level bowling course. Based on results attained from comparisons of specific formats’ unit skills tests and student perceptions, the study determined the effects of each presentation format as a …
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