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 198 for “"Engineering Physics"”.
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Tools for underprepared students in engineering physics with a focus on online mastery learning exercises
… entering college with very little or poor physics background, the transition into fast-paced calculus based physics courses at a large university can be demanding; this thesis documents tools used in a preparatory course which is intended to ease that transition by teaching fundamental …
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Innovating the Study of Self-Regulated Learning: An Exploration through NLP, Generative AI, and LLMs
… set comprises 3,800 student responses from an engineering physics course. The first manuscript develops two NLP-assisted codebooks for identifying learning strategies related to SRL in exam wrapper responses and evaluates the agreement between them and traditional qualitative analysis. The …
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Quantization of multiresolution transform coefficients for high compression of digital images
… from various disciplines including electrical engineering, physics, mathematics, and computer science have benefited from these advances. The greatest impact in computer science by these methods is in the area of image compression. Digital image compression is currently of high interest in …
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Assessing self-similarity in redundant complex and quaternion wavelet domains: Theory and applications
… signals or images that describe phenomena in engineering, physics, medicine, biology, economics, geology, chemistry, and so on. However, it is often difficult for general modeling methods to quantify a self-similarity due to irregularities in the signals or images. Wavelet-based spectral tools …
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Neusch Automated Filter System: A Custom-Designed Photo-Filter Switching Apparatus for Embry-Riddle’s 1 Meter Telescope
… <p>During my senior year in Embry-Riddle’s Engineering Physics program, two others and myself undertook the task of creating a custom photo-filter switching apparatus that would mount on the Cassegrain Instrument Mount. At the end of this senior design we had a product that had the potential …
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Some stochastic integral and discrete equations of the volterra and fredholm types with applications
… mathematical description of random phenomena in engineering, physics, biology, and oceanography. The present study is concerned with random or stochastic integral equations of the Volterra type in the form x(t;w) = h(tiW) + fa k(t,T~w)f(T,x(Tjw»dT, t > 0, and of the Fredholm type in the form 00 …
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The nature of engineering and science knowledge in curriculum: a case study in thermodynamics
… and similarities between the sciences and the engineering sciences as these appear in curriculum texts. The work is presented as a case study of curriculum knowledge in thermodynamics, and the epistemic properties are investigated in four sub-cases in mechanical engineering, chemical …
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Homogeneous nucleation of water vapor in inert gas atmospheres
"The homogeneous nucleation of water vapor in atmospheres of helium, neon, argon, krypton, and xenon was studied using an expansion type cloud chamber. A strong dependence of the nucleation rate on the particular inert carrier gas was observed. At present the only dependence upon the nature of the …
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Nonlinear Estimation and Control Methods for Mechanical and Aerospace Systems under Actuator Uncertainty
<p>Air flow velocity field control is of crucial importance in aerospace applications to prevent the potentially destabilizing effects of phenomena such as cavity ow oscillations, flow separation, flow-induced limit cycle oscillations (LCO) (flutter), vorticity, and acoustic instabilities. Flow …
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Advances in Microfluidics: A Lab-on-a-Disk Approach to Solve Dairy Industry Problems
… thesis reports a combination of engineering, physics, biology and chemistry to create a centrifugal microfluidic system (CMS), methods of fast prototyping of microfluidic disks and advancements in microfabrication to solve problems in the dairy industry. The case study used was …
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A Study into Data Analysis of Varying Types of Langmuir Probes
<p>Langmuir probes are ubiquitously used for in-situ measurements of plasma parameters. These probes have been placed on many different platforms, including experimental sounding rockets for measurements in mesosphere-lower-thermosphere, and also onboard satellites to obtain data sets over an …
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Nonlinear Observers for Human-in-the-loop Control Systems
<p>The development of models for a human-in-the-loop with hardware is an area of ongoing research. The ability to simulate a human-in-the-loop with hardware provides a platform for better understanding the dynamics of human and machine cognition. A human-in-the-loop model provides information that …
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Sliding Mode Observers for Distributed Parameter Systems: Theory and Applications
<p>Many processes in nature and industry can be described by partial differential equations. PDEs employ quantities such as density, temperature, velocity, etc. and their partial derivatives to model these phenomena. However, in the case of distributed parameter systems, it is not always possible …
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Solar Wind-Magnetosphere Coupling: A Global Perspective of Reconnection in the Magnetotail
<p>We present a case study of the 25 December 2015 substorm which occurred between 08:15 and 08:45 Universal Time. During this interval, fast particle flows and field geometry consistent with magnetic reconnection were detected in the mid-tail region. An ejected plasmoid was observed by the …
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Infrasound Propagation in Terrestrial Planetary Atmospheres
<p>Acoustic waves in the infrasonic frequency range, that is below 10 Hertz, have been observed to propagate to high altitudes in Earth's atmosphere. These waves have many sources, both natural and artificial, such as seismic events, convective storm systems, and nuclear explosions. Here, we seek …
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Nonlinear Control for Dual Quaternion Systems
<p>The motion of rigid bodies includes three degrees of freedom (DOF) for rotation, generally referred to as roll, pitch and yaw, and 3 DOF for translation, generally described as motion along the <em>x, y</em> and <em> z</em> axis, for a total of 6 DOF. Many complex mechanical systems exhibit this …
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Ion-Cyclotron Resonance Heating of O+ in the Topside Ionosphere and Mapping Outflows to the Magnetosphere
<p>This thesis considers the heavy ion dynamics due to ion-cyclotron resonance energization processes that take place in the turbulent region of the Earth’s topside, high latitude ionosphere. We simulate the impact of this transverse heating process upon energies and velocity distribution functions …
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Nonlinear Control of a Thermoacoustic System with Multiple Heat Sources and Actuators
<p>Thermoacoustic instabilities can occur in thermal devices when unsteady heat release is coupled with pressure perturbations. This effect results in excitation of Eigen-acoustic modes of the system. These instabilities can lead to unpredictable behavior of the system. Gas-turbine combustion …
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