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 177 for “"Design Changes"”.
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Risk-informed design changes for a passive cooling system
… a LOCA is evaluated as part of a risk-informed design process for a helium-cooled fast reactor. The system was modeled using RELAP5-3D. The epistemic uncertainties in input parameters as well as the epistemic model uncertainties in the code were assessed and propagated through the model using …
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Modeling design changes in vehicle assembly systems : platform transition strategies and manufacturing flexibility
Driven by rising environmental and geopolitical concerns, regulations have been put in place over the last decade to compel car makers to lower the CO2 emissions of their cars. Due to these increasingly stringent vehicle efficiency standards, considerable effort has been expended to reduce vehicle …
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Managing design changes using safety-guided design for a safety critical automotive system
… has a need for safety analysis methods and design processes to ensure these systems function safely. Many current recommendations still focus on traditional methods, which worked well for electro-mechanical designs but are not adequate for software intensive complex systems. System Theoretic …
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An information model for managing design changes in a collaborative multi-disciplinary design environment
… process of these documents reveals that managing design changes constitutes a main source for incompatibilities. More specifically, failure to propagate design changes among the design team is a principal cause of problems. The large amount of design data that is generated within a …
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Using learning analytics to evaluate design changes in MOOCs : a case study on assessing course pacing
Experimentation on course design in MOOCs can determine causal factors that promote learning and can identify aspects of the course where revision is needed. The presence of heterogeneous samples of learners, the difficulty of defining success metrics, and the lack of shared cross-course data are …
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Perceptions of Public High School Design Changes in Virginia Since the Implementation of a Profile of a Virginia Graduate
The design of school buildings has shifted over the past several decades in response to social and political trends, as well as shifts in educational philosophy. Despite the educational system's efforts to adapt teaching and learning to prepare students for the 21st-century workforce, the design of …
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Physical Design Changes in the 19th Century English Asylums: A Study of Insane Asylums as Presented in ‘The Builder’ from 1843-1923
… of ‘Moral Treatment’ 19th century asylums were designed as a curative solution for lunatic patients. Many 19th century scholars considered architectural design elements as remedies for the lunatic population. Due to the presumed connection between architecture and patient cure, many 19th century …
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Methods to improve school design in Sierra Leone
… in Sierra Leone are constructed using a standard design with little variation from building to building. They are relatively high-cost and have poor ventilation, lighting and thermal comfort. In January 2010, thirteen primary schools in Sierra Leone were analyzed in order to identify design …
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Mechanical Redesign and Fabrication of a 12 DOF Orthotic Lower Limb Exoskeleton and 6 Axis Force-Torque Sensor
… details several modifications to the mechanical design of the Orthotic Lower Limb Exoskeleton (OLL-E) that improve upon the functionality and manufacturability of parts and their assemblies. The changes made to these parts maintain or improve the factor of safety against yield and fatigue failure …
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A methodology for engineering design change analysis using system modelling and knowledge management technologies
… current fiercely competitive market, engineering design change management in manufacturing companies is a critical factor for business success. Recognised as inevitable in product development, engineering changes may significantly influence lead time, development cost and product quality of new …
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Design and Analysis of a Desktop Fiber Manufacturing Device
… Desktop Fiber Manufacturing Device and discusses design changes to expand its functionality and usability. This extrusion device consists of an extruder that pushes a preform, hot glue stick in this case, into a heater. The softened preform can then be drawn into fiber that is then spooled after …
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Performance Evaluation and Modeling Techniques for Parallel Processors
… the effects on performance of certain system design changes. The constructed model is based on measurements obtained during normal machine operation and captures various performance issues including multiprogramming and system overheads, and contentions for resources.
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Cost estimation of functional and physical changes made to complex systems
… communicate the increasing complexity of system design to cost data. Additionally, current cost estimation techniques have had a historical inability to produce credible and explainable results. It is often considered to be a "black art" with the recurring question: "Where did that number come …
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A Sociotechnical Approach to Evaluating the Effects of Managerial Time Allotment on Department Performance
Current organizational design changes such as restructuring, production advancements, and information technology improvements have caused many organizations to move to flatter management structures. Changes in the organizational structure along with the demand for improved performance have …
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IDDAP -- Interactive computer assistance for creative digital design
"A new computer-aided design program to assist in the initial phases of logical design is described. The program, intended for use via an on-line remote terminal, will allow the designer to study and experiment with design alternatives during the initial creative design phases. An ALGOL-like …
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Investigation of suction recirculation in rocket pump inducers
… the Moore Elliptic Flow Program, MEFP. Two redesigns of the Rocketdyne ADP inducer are performed. The first redesign changes the hub-tip ratio from 0.3 to 0.4. The second redesign influences the leading edge tip region. This part of the blade is rounded off in a meridional view, resulting in …
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The development of a minimum weight design algorithm using fully stressed design iteration
… method for obtaining a minimum weight structural design, called an optimum design. The optimum design iteration is based on a sequence of fully stressed designs, each intermediate design possessing a distinct set of allowable stresses that force the desirable design changes to occur. The test for …
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Online polymer crystallization experiment
… tool. Finally, the experiment was used in the design process for modifying the generic iLab framework to incorporate interactive functionality. Specifically, a reservation model and design changes to the experiment storage and service broker were proposed based on the Polymerlab, and the …
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Functional thinking in cost estimation through the tools and concepts of axiomatic design
… cost or the active consideration of cost as a design constraint. The existing tools are currently incapable of anticipating the unseen or latent effects of design changes made in an effort to cut cost. This paper presents an example of how the tools and concepts of axiomatic design theory can …
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