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 39 for “"experimental process"”.
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Computational-Experimental Process Development for Laser Powder Bed Fusion Additive Manufacturing
… with powder handling, identification of process parameters, part qualification and quality control, and low build rates that lead to high part costs. This thesis presents workflows, tools, and understanding for practitioners and researchers seeking to address these challenges, in …
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Modeling and experimental process optimization for a SiH4 + H2 surface wave plasma discharge for silicon photovoltaics
… optimized for 900 MHz microwave excitation. The process gases used were silane (SiH4) and hydrogen (H2). The plasma source was shown to be advantageous in depositing films at very high deposition rate, exceeding 2 nm/s for nc-Si, while deposition of a-Si was observed at 10 nm/s and could be …
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An inverse problem framework for reconstruction of phonon properties using solutions of the Boltzmann transport equation
… time distribution, from thermal spectroscopy experimental results is proposed and extensively validated. The reconstruction is formulated as a non-convex optimization problem whose goal is to minimize the difference between the experimental results and the one calculated by a Boltzmann …
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Extended Surface Heat Transfer Coefficients via Endwall Temperature Measurements
… in this thesis which helps in simplifying the experimental process used to obtain average heat transfer data on the pin surface, at the expense of additional post processing complexity. The method is based on a unique, analytical solution of the longitudinal conduction equation with internal …
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Reconstruction of 3-D structural dynamic response fields: an experimental, laser-based approach with statistical emphasis
… in steady-state vibration. This results in an experimental process which reconstructs the response field from a set of 3-D projections based on Laser-Doppler-Vibrometer (LDV) localized instantaneous velocity measurements. Included along with an estimate of the 3-D velocity field, are its …
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Exploring temporality
… based analysis within the architectural design process. The concept of temporality is evaluated in the work of artists Andy Goldsworthy and Gordon Matta-Clark. In addition, their creative processes are studied toward establishing an architectural design methodology. The ruins of an abandoned …
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Design And Testing Validation Of An Extendable Pressurized Tunnel For An Inflatable Lunar Habitat
… tunnel will allow simple docking procedures. An experimental process is required to determine the best procedure to dock the pressurized rover with the habitat. This will be done by a number of tests to determine the docking position. Testing of the docking element, extension units, and docking …
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Production and characterisation of nanoparticulate silicon photovoltaic devices
… of silicon PV devices, confirming that the experimental process followed resulted in the successful production of a functional silicon solar cell. This thesis outlines the particle production process, ink formulation technique, and the device fabrication process. Results from the physical …
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Tension Activated Kirigami Structures for Interlayer Use in Circular Construction Applications
… for early material and design selection and an experimental process to develop an empirical database. Experimentation on different materials, designs, aspect ratios, etc. has provided data to begin extrapolating trends and behaviors of the architected material. These data will allow for design …
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Minimal Constraint and Precision Placement in Cyclic Testing of High Life-Cycle Products
… of these electrical contacts is a highly experimental process, and thus establishing a method and test equipment to determine the physical and electrical characteristics of these contacts over their lifetime will allow for the accelerated development of these products. This body of work …
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A study of human measurement error in a controlled experiment for micrometer measurements
… control tests that describe a manufacturing process. The author of this report designed a specialized measurement jig that was used to isolate human measurement error. Specifically, the tests involved seven human inspectors making micrometer measurements of the diameters of cylindrical brass …
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BEAMED: A Bench for Automated Measurements of Electrical Discharges - A New Standard for Paschen Curves
… of Paschen's law, current methodologies for experimental Paschen tests in direct current (DC) conditions lack standardized practices. This thesis presents the development and validation of a DC-based standard for electrical discharge initiation, using the BEnch for Automated Measurements of …
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The SmartLab: experimental and environmental control and monitoring of the chemistry laboratory
… on acquisition of data such as environmental and experimental conditions and the control of experimental apparatus. A suite of software applications will be described which captures data from a standard data acquisition card, processes this and archives it in an appropriate repository. The …
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Deeply Virtual Compton Scattering at Hall A, Jefferson Lab
… degrees of freedom of it’s constituents. Experimentally observable single particle densities provide important insights into our understanding of the quark-gluon system and hence help fill in the gaps of QCD. Generalized Parton Distributions (GPDs) provide simultaneous information of both …
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Optimization of biomimetic propulsion in a fish like robot
… design advantages found in the natural world to experimental devices and, ultimately, practical machines. The work contained herein consisted of the construction of a biomimetic carangiform robotic fish as a functional experimental apparatus, the prediction of propulsive forces based on …
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Tire Contact Patch Characterization through Finite Element Modeling and Experimental Testing
… developed, using a novel reverse engineering process. In order to validate this model, an experimental process has been developed to obtain the footprint shape and contact pressure distribution. The differences between the experimental and the simulation results are discussed and compared. The …
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Design and fabrication of a tapped densification apparatus for bulk solids
… both the frequency and the amplitude during the experimental process to determine what role these two factors contribute to the tap density of a sample. Thus, the topic of this thesis is the design, fabrication and testing of a mechanical system device that allows for finite control of the tap …
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Comparison of performance and emission characteristics between ceramic and metallic catalytic converter
… catalytic converters through simulation and experimental in terms of flow distribution and pollutant gases conversion. ANSYS Fluent 16.2 has been used for the simulation process and Mitsubishi 4G93 1800cc gasoline engine with difference speed and 25% constant load were used for the emission …
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Super green: an architect’s redesign of concrete façade panels using waste materials
… research developed a critique, methodology and experimental process that examined what an architect brings to the material development process. This line of questioning is framed within the context of developing a concrete façade panel from industrial waste that is bioreceptive, meaning it can …
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Block copolymer self-assembly : lithography, magnetic fabrication, and optimization
… ever demonstrated to model the BCP self-assembly process. The built model is able to recognize different BCP patterns and predicting the resulting morphology and pattern quality based on experimental process parameters. With this model, the BCP self-assembly can be further optimized toward …
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