+publisher:"University of Texas – Austin" +contributor:("Hall, Matthew J")

University of Texas – Austin

1. Doglio, Jean Marie. Market study and design of an induction heating product to warm weighlifting barbells.

Degree: MSin Engineering, Mechanical Engineering, 2014, University of Texas – Austin

URL: http://hdl.handle.net/2152/31965

► In order to solve the problem of discomfort and injury caused by weightlifting with barbells in cold temperatures, an induction heater product was designed to… (more)

Subjects/Keywords: Induction; Heater; Design; Market; Simulation; Product; Barbell

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APA (6^th Edition):

Doglio, J. M. (2014). Market study and design of an induction heating product to warm weighlifting barbells. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/31965

Chicago Manual of Style (16^th Edition):

Doglio, Jean Marie. “Market study and design of an induction heating product to warm weighlifting barbells.” 2014. Masters Thesis, University of Texas – Austin. Accessed March 07, 2021. http://hdl.handle.net/2152/31965.

MLA Handbook (7^th Edition):

Doglio, Jean Marie. “Market study and design of an induction heating product to warm weighlifting barbells.” 2014. Web. 07 Mar 2021.

Vancouver:

Doglio JM. Market study and design of an induction heating product to warm weighlifting barbells. [Internet] [Masters thesis]. University of Texas – Austin; 2014. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2152/31965.

Council of Science Editors:

Doglio JM. Market study and design of an induction heating product to warm weighlifting barbells. [Masters Thesis]. University of Texas – Austin; 2014. Available from: http://hdl.handle.net/2152/31965

University of Texas – Austin

2. Duong, Tai Anh. Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine.

Degree: MSin Engineering, Mechanical Engineering, 2011, University of Texas – Austin

URL: http://hdl.handle.net/2152/ETD-UT-2011-08-4273

► This research project was about the combined organic Rankine cycle which extracted energy from the exhaust gas of a diesel engine. There was a study… (more)

▼ This research project was about the combined organic Rankine cycle which extracted energy from the exhaust gas of a diesel engine. There was a study about significant properties of suitable working fluids. The chosen working fluid, R134a, was used to operate at the dry condition when it exited the steam piston engine. Furthermore, R134a is environmentally friendly with low environmental impact. It was also compatible with sealing materials. There were calibrations for the components of the combined Rankine cycle. The efficiency of the heat exchanger converting exhaust heat from the diesel engine to vaporize R134a was 89%. The average efficiency of the generator was 50%. The hydraulic pump used for the combined Rankine cycle showed a transporting problem, as vapor-lock occurred when the pump ran for about 1 minute. The output of the combined Rankine cycle was normalized to compensate for the parasitic losses of a virtual vane pump used in hydraulic systems for the 6 liter diesel engines. There were three different vane pump widths from different pumps to compare frictional loss. The pump with the smallest vane width presented the least frictional mean effective pressure (fmep) (0.26 kPa) when scaled with the displacement of the GMC Sierra 6 liter diesel engine. The power output of the Rankine cycle was scaled to brake mean effective pressure (bmep) to compare with the frictional mean effective pressure. The maximum bmep was at 0.071 kPa when diesel engine had rotational speed at 2190 RPM. The power outputs of the organic Rankine compensated partially the frictional loss of the vane pumps in the 6 liter diesel engine. By using R134a, the condensing pressure was 0.8 MPa; hence, the power outputs from steam engine were limited. Therefore, refrigerants with lower condensing pressure were needed. There were proposal for improvement of the organic Rankine by substituting R134a by R123 (0.1 MPa), R21 (0.2 MPa), and R114 (0.25 MPa) . Advisors/Committee Members: Matthews, Ronald D. (advisor), Hall, Matthew J. (committee member).

Subjects/Keywords: Organic Rankine cycle; Diesel engine; Waste heat recovery; Reciprocal steam engine

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APA (6^th Edition):

Duong, T. A. (2011). Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-08-4273

Chicago Manual of Style (16^th Edition):

Duong, Tai Anh. “Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine.” 2011. Masters Thesis, University of Texas – Austin. Accessed March 07, 2021. http://hdl.handle.net/2152/ETD-UT-2011-08-4273.

MLA Handbook (7^th Edition):

Duong, Tai Anh. “Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine.” 2011. Web. 07 Mar 2021.

Vancouver:

Duong TA. Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine. [Internet] [Masters thesis]. University of Texas – Austin; 2011. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2152/ETD-UT-2011-08-4273.

Council of Science Editors:

Duong TA. Heat waste recovery system from exhaust gas of diesel engine to a reciprocal steam engine. [Masters Thesis]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-08-4273

3. -4907-2702. Model-based decentralized optimal control of a microgrid.

Degree: PhD, Mechanical Engineering, 2019, University of Texas – Austin

URL: http://dx.doi.org/10.26153/tsw/5755

► Power networks have experienced dramatic changes with the growth of renewable energy and `smart' grids. To accommodate the challenges posed to traditional power system control… (more)

▼ Power networks have experienced dramatic changes with the growth of renewable energy and `smart' grids. To accommodate the challenges posed to traditional power system control architectures, the microgrid concept has gained traction. Microgrids are small-scale power networks that can disconnect from the main grid and operate autonomously if necessary. These systems add robustness and facilitate the incorporation of renewable power, but they face control challenges of their own due to the lack of significant inertial generation. Without the main grid to provide balance, the high proportion of electrically-interfaced power resources can cause significant deterioration in microgrid stability. This dissertation proposes designs to improve decentralized control in microgrids; model based information is incorporated into controllers and estimators to more optimally guide control signals, while still only using local data for real-time computation. We outline the role that microgrid topology can have on stability, and how judicious power injection can mitigate instabilities. These results are extended to a decentralized H-infinity control design for microgrid frequency; even with limited model-based information and controller distribution, the design offers significant improvements over traditional controllers. Building upon the idea of microgrid stabilization, we also present a control method by which a wind turbine can be coordinated for microgrid support. The wind turbine is used as a controllable power source by utilizing the rotational energy stored in its rotor; this design incorporates an aerodynamic wind turbine model and a novel optimal blade pitch angle controller to ensure stable turbine operation. This allows for rapid power injection for grid support. This theme concludes with a decentralized estimation scheme to facilitate coordinated control across a microgrid using only local data. We leverage the frequency synchronization and load-sharing intrinsic to the microgrid so that local measurements can provide insight about grid-wide conditions. This allows for effective implementation of optimal filtering techniques so that remote conditions can be estimated using only local data; this allows for grid-wide coordination and optimization. Together these ideas represent the concept that the microgrid model, even in a limited and inaccurate sense, can be manipulated to provide significant benefits for decentralized control across the network. Advisors/Committee Members: Chen, Dongmei, Ph. D. (advisor), Bakolas, Efstathios (committee member), Du, Pengwei (committee member), Hall, Matthew J (committee member), Seepersad, Carolyn (committee member).

Subjects/Keywords: Renewable energy; Microgrid; Power systems; Optimal; Optimal control; Decentralized control; Dynamic systems

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APA (6^th Edition):

-4907-2702. (2019). Model-based decentralized optimal control of a microgrid. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/5755

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Author name may be incomplete

Chicago Manual of Style (16^th Edition):

-4907-2702. “Model-based decentralized optimal control of a microgrid.” 2019. Doctoral Dissertation, University of Texas – Austin. Accessed March 07, 2021. http://dx.doi.org/10.26153/tsw/5755.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

-4907-2702. “Model-based decentralized optimal control of a microgrid.” 2019. Web. 07 Mar 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-4907-2702. Model-based decentralized optimal control of a microgrid. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2019. [cited 2021 Mar 07]. Available from: http://dx.doi.org/10.26153/tsw/5755.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

-4907-2702. Model-based decentralized optimal control of a microgrid. [Doctoral Dissertation]. University of Texas – Austin; 2019. Available from: http://dx.doi.org/10.26153/tsw/5755

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

University of Texas – Austin

4. Marr, Kevin Chek-Shing. Investigation of acoustically forced non-premixed jet flames in crossflow.

Degree: PhD, Aerospace Engineering, 2011, University of Texas – Austin

URL: http://hdl.handle.net/2152/ETD-UT-2011-05-3133

► The work presented here discusses the effects of strong acoustic forcing on jet flames in crossflow (JFICF) and the physical mechanisms behind theses effects. For… (more)

▼ The work presented here discusses the effects of strong acoustic forcing on jet flames in crossflow (JFICF) and the physical mechanisms behind theses effects. For forced non-premixed JFICF, the jet fuel flow is modulated using an acoustic speaker system, which results in a drastic decrease in flame length and soot luminosity. Forced JFICF are characterized by periodic ejections of high-momentum, deeply penetrating vortical structures, which draws air into the jet nozzle and enhances mixing in the nearfield region of the jet. Mixture fraction images of the non-reacting forced jet in crossflow are obtained from acetone planar laser-induced fluorescence and show that the ejected jet fluid is effectively partially premixed. Flame luminosity images and exhaust gas measurements show that forced non-premixed JFICF exhibit similar characteristics to unforced partially-premixed JFICF. Both strong forcing and air dilution result in net reductions in NOx, but increases in CO and unburned hydrocarbons. NOx scaling analysis is presented for both forced non-premixed and unforced partially-premixed flames. Using flame volume arguments, EINOx scales with amplitude ratio for forced non- premixed flames, but does not scale with air dilution for unforced partially-premixed flames. The difference in scaling behavior is attributed to differences in flame structure. The effect of forcing on the flowfield dynamics of non-premixed JFICF is investigated using high-speed stereoscopic particle image velocimetry and luminosity imaging. The frequency spectra of the windward and lee-side flame base motions obtained from luminosity movies of the forced JFICF show a peak at the forcing frequency in the lee-side spectrum, but not on the windward-side spectrum. The lee-side flame base responds to the forcing frequency because the lee-side flame base stabilizes closer to the jet exit. The windward-side flame base does not respond to the forcing frequency because the integrated effect of the incident crossflow and vortical ejections leads to extinction of the flame base. From the PIV measurements, flowfield statistics are conditioned at the flame base. The local gas velocity at the flame base did not collapse for forced and unforced JFICF and was found to exceed 3SL. The flame propagation velocity was determined from the motion of the flame base, which is inferred from regions of evaporated seed particles in the time-resolved PIV images. The flame propagation velocity collapses for forced and unforced JFICF, which implies that the flame base is an edge flame; however, the most probable propagation velocity, approximately 2-3SL, is larger than propagation velocity predicted by edge flame theories. A possible explanation is that the flame propagation is enhanced by turbulent intensities and flame curvature. Advisors/Committee Members: Clemens, Noel T. (advisor), Ezekoye, Ofodike A. (advisor), Hall, Matthew J. (committee member), Raman, Venkat (committee member), Varghese, Philip L. (committee member).

Subjects/Keywords: Pulsed combustion; Acoustics; Jet flames; Emissions; Flame stability

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APA (6^th Edition):

Marr, K. C. (2011). Investigation of acoustically forced non-premixed jet flames in crossflow. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-05-3133

Chicago Manual of Style (16^th Edition):

Marr, Kevin Chek-Shing. “Investigation of acoustically forced non-premixed jet flames in crossflow.” 2011. Doctoral Dissertation, University of Texas – Austin. Accessed March 07, 2021. http://hdl.handle.net/2152/ETD-UT-2011-05-3133.

MLA Handbook (7^th Edition):

Marr, Kevin Chek-Shing. “Investigation of acoustically forced non-premixed jet flames in crossflow.” 2011. Web. 07 Mar 2021.

Vancouver:

Marr KC. Investigation of acoustically forced non-premixed jet flames in crossflow. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2011. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2152/ETD-UT-2011-05-3133.

Council of Science Editors:

Marr KC. Investigation of acoustically forced non-premixed jet flames in crossflow. [Doctoral Dissertation]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-05-3133

5. Kurzawski, Andrew Joseph. Inverse modeling and characterization of an experimental testbed to advance fire scene reconstruction.

Degree: PhD, Mechanical Engineering, 2018, University of Texas – Austin

URL: http://hdl.handle.net/2152/63814

► Fire investigators examine fire scenes and collect data to form hypotheses on the origin and cause of the fire. The fire scene contains a wealth… (more)

▼ Fire investigators examine fire scenes and collect data to form hypotheses on the origin and cause of the fire. The fire scene contains a wealth of data in the form of damage to objects in the areas affected by the fire. A computational framework with the ability to make inferences on the origin of a fire based on the data would be beneficial to the fire investigation process. Such a framework would require models of the fires, quantifiable damage metrics, and a method for making inferences on the fire origin. This work seeks to address two of the three points by using Bayesian inversion for determining the most likely origin of a fire in a compartment and constructing an algorithm for determining the heat-release rate from a burning object that can be supplied to a computational fire model. To accomplish these tasks, an experimental burn compartment was designed and a series of tests were run with controlled heat-release rates. Data collected in each experiment included temperatures, heat fluxes, and gas velocities. Modeling of the controlled heat-release rate experiments was carried out in the Consolidated Model of Fire and Smoke Transport (CFAST) and Fire Dynamics Simulator (FDS). Both the Bayesian inversion framework and heat-release rate reconstruction algorithm rely on computational fire models to determine the fire location and heat-release rate respectively. Following the modeling efforts, the Bayesian inversion framework was tested on synthetic data generated by FDS using the geometry of the experimental structure. Time-integrated total energy per unit area data were used as a placeholder for damage models of objects found in a fire scene. The heat-release rate reconstruction algorithm was used to determine the heat-release rates of the experiments using transient heat flux data collected at an array of sensors. Advisors/Committee Members: Ezekoye, Ofodike A. (advisor), Hall, Matthew J (committee member), Moser, Robert D (committee member), Bui-Thanh, Tan (committee member), Fuss, Stephen P (committee member).

Subjects/Keywords: Heat transfer; Bayesian inversion; Fire forensics; Inverse problems; Fire modeling

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APA (6^th Edition):

Kurzawski, A. J. (2018). Inverse modeling and characterization of an experimental testbed to advance fire scene reconstruction. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/63814

Chicago Manual of Style (16^th Edition):

Kurzawski, Andrew Joseph. “Inverse modeling and characterization of an experimental testbed to advance fire scene reconstruction.” 2018. Doctoral Dissertation, University of Texas – Austin. Accessed March 07, 2021. http://hdl.handle.net/2152/63814.

MLA Handbook (7^th Edition):

Kurzawski, Andrew Joseph. “Inverse modeling and characterization of an experimental testbed to advance fire scene reconstruction.” 2018. Web. 07 Mar 2021.

Vancouver:

Kurzawski AJ. Inverse modeling and characterization of an experimental testbed to advance fire scene reconstruction. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2018. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2152/63814.

Council of Science Editors:

Kurzawski AJ. Inverse modeling and characterization of an experimental testbed to advance fire scene reconstruction. [Doctoral Dissertation]. University of Texas – Austin; 2018. Available from: http://hdl.handle.net/2152/63814

6. -2204-2458. Model comparison of prototype diesel rotating liner engine and baseline diesel engine.

Degree: MSin Engineering, Mechanical Engineering, 2016, University of Texas – Austin

URL: http://hdl.handle.net/2152/47141

► Frictional losses in combustion engines have been the subject of many automotive engineers’ research. Understanding the fundamentals behind each frictional loss helps pave the way… (more)

Subjects/Keywords: Diesel; Prototype engine; Diesel rotating liner engine; Baseline diesel engine; Piston assembly friction; Frictional loss; Cylinder wall

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APA (6^th Edition):

-2204-2458. (2016). Model comparison of prototype diesel rotating liner engine and baseline diesel engine. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/47141

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Chicago Manual of Style (16^th Edition):

-2204-2458. “Model comparison of prototype diesel rotating liner engine and baseline diesel engine.” 2016. Masters Thesis, University of Texas – Austin. Accessed March 07, 2021. http://hdl.handle.net/2152/47141.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

-2204-2458. “Model comparison of prototype diesel rotating liner engine and baseline diesel engine.” 2016. Web. 07 Mar 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-2204-2458. Model comparison of prototype diesel rotating liner engine and baseline diesel engine. [Internet] [Masters thesis]. University of Texas – Austin; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2152/47141.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

-2204-2458. Model comparison of prototype diesel rotating liner engine and baseline diesel engine. [Masters Thesis]. University of Texas – Austin; 2016. Available from: http://hdl.handle.net/2152/47141

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

7. -2938-2949. Performance improvements of turbocharged engines with the use of a PTP turbo blanket.

Degree: MSin Engineering, Mechanical engineering, 2016, University of Texas – Austin

URL: http://hdl.handle.net/2152/43718

► Efforts in R&D of modern vehicles are highly focused on improvements of the overall efficiency. The engine still has potential for better performance which not… (more)

▼ Efforts in R&D of modern vehicles are highly focused on improvements of the overall efficiency. The engine still has potential for better performance which not only implies pure efficiency considerations but also the power output specific to the engine size and weight. Turbochargers are a key technology. However, a significant amount of exhaust energy is lost through the turbine housing, and thus cannot be utilized to boost the intake air. If a certain portion of the lost heat can be conserved, however, the process in the turbine can be shifted more towards adiabatic expansion which, in theory, is the ideal case. The Engines Research Program at The University of Texas at Austin conducted comparison tests of a PTP turbo blanket. The baseline engine was a Cummins 6.7 Turbocharged Diesel Engine hooked up to a Superflow SF-901 dynamometer. A series of steady-state points were obtained as well as three instantaneous load tip-in scenarios (hard acceleration transients) in order to test for changes in transient response due to the turbo blanket. In addition to seven thermocouples that we installed around the turbine we used the open ECU software to log a set of about 30 engine parameters. The recorded data was first analysed with respect to the performance of the turbocharger alone. On the steady-state cases, the temperature increase of the turbine housing was significant while we did not measure a major increase of the oil temperature in the exit of the center section. According to these findings, oil “coking” was not a concern since the temperature difference of the oil with and without the turbo blanket was negligibly small. The boost pressure increase corresponded well with the higher turbo shaft speeds when the turbo blanket was applied. Second, tip-in transients were performed to examine the difference in performance during a hard acceleration. The turbo spooled up more rapidly with the turbo blanket installed in comparison to the baseline configuration. In all cases this resulted in an improved boost performance in the intake and a significant time-to-torque advantage of the engine with a torque benefit of up to 140 Nm while the acceleration was improved by 200-250 rpm for most of the tip-in event. This report presents detailed data regarding experiments in which the turbocharger and the engine are treated as an integrated system with a PTP turbo blanket applied in comparison to the baseline configuration for which the turbine housing is not insulated. Advisors/Committee Members: Matthews, Ronald D. (advisor), Hall, Matthew J. (committee member).

Subjects/Keywords: PTP-turbo; PTP; Turbo-blanket; Turbo blanket; Turboblanket; Diesel; Cummins

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APA (6^th Edition):

-2938-2949. (2016). Performance improvements of turbocharged engines with the use of a PTP turbo blanket. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/43718

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

-2938-2949. “Performance improvements of turbocharged engines with the use of a PTP turbo blanket.” 2016. Masters Thesis, University of Texas – Austin. Accessed March 07, 2021. http://hdl.handle.net/2152/43718.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

-2938-2949. “Performance improvements of turbocharged engines with the use of a PTP turbo blanket.” 2016. Web. 07 Mar 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-2938-2949. Performance improvements of turbocharged engines with the use of a PTP turbo blanket. [Internet] [Masters thesis]. University of Texas – Austin; 2016. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2152/43718.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

-2938-2949. Performance improvements of turbocharged engines with the use of a PTP turbo blanket. [Masters Thesis]. University of Texas – Austin; 2016. Available from: http://hdl.handle.net/2152/43718

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

8. Hoy, Christopher Luk, 1982-. Development of femtosecond laser endoscopic microsurgery.

Degree: PhD, Mechanical Engineering, 2011, University of Texas – Austin

URL: http://hdl.handle.net/2152/ETD-UT-2011-05-2659

► Femtosecond laser microsurgery has emerged as a remarkable technique for precise ablation of biological systems with minimal damage to their surrounding tissues. The combination of… (more)

▼ Femtosecond laser microsurgery has emerged as a remarkable technique for precise ablation of biological systems with minimal damage to their surrounding tissues. The combination of this technique with nonlinear optical imaging provides a means of microscopic visualization to guide such surgery in situ. A clinical endoscope capable of image-guided femtosecond laser microsurgery will provide physicians a means for cellular-level microsurgery with the highest precision. This dissertation focuses the development of a miniaturized fiber-coupled probe for image-guided microsurgery, towards future realization as a clinical endoscope. The first part of the dissertation describes the development of an 18-mm diameter probe. This development includes delivery of femtosecond laser pulses with pulse energy in excess of 1 µJ through air-core photonic bandgap fiber, laser beam scanning by a microelectromechanical system scanning mirror, and development of a new image reconstruction methodology for extracting increased temporal information during Lissajous beam scanning. During testing, the 18-mm probe compares favorably with the state-of-the-art as a microscopic imaging tool and we present the first known demonstration of cellular femtosecond laser microsurgery through an optical fiber. The second part of the dissertation explores further refinement of the design into a streamlined package with 9.6 mm diameter and improved imaging resolution. Study of the optical performance through analytical and computer-aided optical design indicates that simple custom lenses can be designed that require only commercial-grade manufacturing tolerances while still producing a fully aberration-corrected microsurgical endoscope. With the 9.6-mm probe, we demonstrate nonlinear optical imaging, including tissue imaging of intrinsic signals from collagen, using average laser powers 2-3× lower than the current state-of-the-art. We also demonstrate the use of the 9.6-mm probe in conjunction with gold nanoparticles for enhanced imaging and microsurgery through plasmonics. Finally, in the third part of this dissertation, we detail bench-top development of a new clinical application for combined femtosecond laser microsurgery and nonlinear optical imaging: the treatment of scarred vocal folds. We show the utility of femtosecond laser microsurgery for creating sub-epithelial voids in vocal fold tissue that can be useful for enhancing localization of injectable biomaterial treatments. We demonstrate that a single compact fiber laser system can be utilized for both microsurgery and imaging. Furthermore, the proposed clinical technique is shown to be achievable with parameters (e.g., pulse energy, focused spot size) that were found to be attainable with fiber-coupled probes while still achieving ablation speeds practical for clinical use. Advisors/Committee Members: Ben-Yakar, Adela (advisor), Hall, Matthew J. (committee member), Ho, Paul S. (committee member), Sokolov, Konstantin V. (committee member), Tunnell, James W. (committee member).

Subjects/Keywords: Nonlinear optics; Laser ablation; Endoscopy; Laser surgery

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APA (6^th Edition):

Hoy, Christopher Luk, 1. (2011). Development of femtosecond laser endoscopic microsurgery. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-05-2659

Chicago Manual of Style (16^th Edition):

Hoy, Christopher Luk, 1982-. “Development of femtosecond laser endoscopic microsurgery.” 2011. Doctoral Dissertation, University of Texas – Austin. Accessed March 07, 2021. http://hdl.handle.net/2152/ETD-UT-2011-05-2659.

MLA Handbook (7^th Edition):

Hoy, Christopher Luk, 1982-. “Development of femtosecond laser endoscopic microsurgery.” 2011. Web. 07 Mar 2021.

Vancouver:

Hoy, Christopher Luk 1. Development of femtosecond laser endoscopic microsurgery. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2011. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2152/ETD-UT-2011-05-2659.

Council of Science Editors:

Hoy, Christopher Luk 1. Development of femtosecond laser endoscopic microsurgery. [Doctoral Dissertation]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-05-2659

University of Texas – Austin

9. Ates, Murat, 1982-. Fuel economy modeling of light-duty and heavy-duty vehicles, and coastdown study.

Degree: MSin Engineering, Mechanical Engineering, 2009, University of Texas – Austin

URL: http://hdl.handle.net/2152/ETD-UT-2009-05-80

► Development of a fuel economy model for light-duty and heavy-duty vehicles is part of the Texas Department of Transportation’s “Estimating Texas Motor Vehicle Operating Costs”… (more)

▼ Development of a fuel economy model for light-duty and heavy-duty vehicles is part of the Texas Department of Transportation’s “Estimating Texas Motor Vehicle Operating Costs” project. A literature review for models that could be used to predict the fuel economy of light-duty and heavy-duty vehicles resulted in selection of coastdown coefficients to simulate the combined effects of aerodynamic drag and tire rolling resistance. For light-duty vehicles, advantage can be taken of the modeling data provided by the United States Environmental Protection Agency (EPA) for adjusting chassis dynamometers to allow accurate determination of emissions and fuel economy so that compliance with emissions standards and Corporate Average Fuel Economy (CAFE) regulations can be assessed. Initially, EPA provided vehicle-specific data that were relevant to a physics-based model of the forces at the tire-road interface. Due to some limitations of these model parameters, EPA now provides three vehicle-specific coefficients obtained from vehicle coastdown data. These coefficients can be related back to the original physics-based model of the forces at the tire-road interface, but not in a manner that allows the original modeling parameters to be extracted from the coastdown coefficients. Nevertheless, as long as the operation of a light-duty vehicle does not involve extreme acceleration or deceleration transients, the coefficients available from the EPA can be used to accurately predict fuel economy. Manufacturers of heavy-duty vehicles are not required to meet any sort of CAFE standards, and the engines used in heavy-duty vehicles, rather than the vehicles themselves, are tested (using an engine dynamometer) to determine compliance with emissions standards. Therefore, EPA provides no data that could be useful for predicting the fuel economy of heavy-duty vehicles. Therefore, it is necessary to perform heavyduty coastdown tests in order to predict fuel economy, and use these tests to develop vehicle-specific coefficients for the force at the tire-road interface. Given these coefficients, the fuel economy of a heavy-duty vehicle can be calculated for any driving schedule. The heavy-duty vehicle model developed for this project is limited to pre-2007 calendar year heavy-duty vehicles due to the adverse effects of emissions components that were necessary to comply with emissions standards that went into effect January 2007. Advisors/Committee Members: Matthews, Ronald D. (advisor), Hall, Matthew J. (committee member).

Subjects/Keywords: Fuel Economy; Fuel Economy Modeling; Light-Duty; Heavy-Duty; Automotive; Vehicle; Coastdown; Coast-down; AVL ADVISOR; AVL CRUISE; AVL BOOST

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APA (6^th Edition):

Ates, Murat, 1. (2009). Fuel economy modeling of light-duty and heavy-duty vehicles, and coastdown study. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2009-05-80

Chicago Manual of Style (16^th Edition):

Ates, Murat, 1982-. “Fuel economy modeling of light-duty and heavy-duty vehicles, and coastdown study.” 2009. Masters Thesis, University of Texas – Austin. Accessed March 07, 2021. http://hdl.handle.net/2152/ETD-UT-2009-05-80.

MLA Handbook (7^th Edition):

Ates, Murat, 1982-. “Fuel economy modeling of light-duty and heavy-duty vehicles, and coastdown study.” 2009. Web. 07 Mar 2021.

Vancouver:

Ates, Murat 1. Fuel economy modeling of light-duty and heavy-duty vehicles, and coastdown study. [Internet] [Masters thesis]. University of Texas – Austin; 2009. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2152/ETD-UT-2009-05-80.

Council of Science Editors:

Ates, Murat 1. Fuel economy modeling of light-duty and heavy-duty vehicles, and coastdown study. [Masters Thesis]. University of Texas – Austin; 2009. Available from: http://hdl.handle.net/2152/ETD-UT-2009-05-80

University of Texas – Austin

10. Hubbard, Joshua Allen, 1982-. Enhanced real-time bioaerosol detection : atmospheric dispersion modeling and characterization of a family of wetted-wall bioaerosol sampling cyclones.

Degree: PhD, Mechanical Engineering, 2009, University of Texas – Austin

URL: http://hdl.handle.net/2152/ETD-UT-2009-08-287

► This work is a multi-scale effort to confront the rapidly evolving threat of biological weapons attacks through improved bioaerosol surveillance, detection, and response capabilities. The… (more)

▼ This work is a multi-scale effort to confront the rapidly evolving threat of biological weapons attacks through improved bioaerosol surveillance, detection, and response capabilities. The effects of bioaerosol release characteristics, transport in the atmospheric surface layer, and implications for bioaerosol sampler design and real-time detection were studied to develop risk assessment and modeling tools to enhance our ability to respond to biological weapons attacks. A simple convection-diffusion-sedimentation model was formulated and used to simulate atmospheric bioaerosol dispersion. Model predictions suggest particles smaller than 60 micrometers in aerodynamic diameter (AD) are likely to be transported several kilometers from the source. A five fold increase in effective mass collection rate, a significant bioaerosol detection advantage, is projected for samplers designed to collect particles larger than the traditional limit of 10 micrometers AD when such particles are present in the source distribution. A family of dynamically scaled wetted-wall bioaerosol sampling cyclones (WWC) was studied to provide bioaerosol sampling capability under various threat scenarios. The effects of sampling environment, i.e. air conditions, and air flow rate on liquid recovery rate and response time were systematically studied. The discovery of a critical liquid input rate parameter enabled the description of all data with self-similar relationships. Empirical correlations were then integrated into system control algorithms to maintain microfluidic liquid output rates ideally suited for advanced biological detection technologies. Autonomous ambient air sampling with an output rate of 25 microliters per minute was achieved with open-loop control. This liquid output rate corresponds to a concentration rate on the order of 2,000,000, a substantial increase with respect to other commercially available bioaerosol samplers. Modeling of the WWC was performed to investigate the underlying physics of liquid recovery. The set of conservative equations governing multiphase heat and mass transfer within the WWC were formulated and solved numerically. Approximate solutions were derived for the special cases of adiabatic and isothermal conditions. The heat and mass transfer models were then used to supplement empirical correlations. The resulting semi-empirical models offer enhanced control over liquid concentration factor and further enable the WWC to be deployed as an autonomous bioaerosol sampler. Advisors/Committee Members: Haglund, John S. (advisor), Ezekoye, Ofodike A. (advisor), Hall, Matthew J. (committee member), Hidrovo, Carlos H. (committee member), Novoselac, Atila (committee member).

Subjects/Keywords: Bioaerosol sampling and detection; Atmospheric dispersion modeling; Coarse particulate transport; Wetted-wall bioaerosol sampling cyclone; Concentration factor; Numerical multiphase heat and mass transfer model

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hubbard, Joshua Allen, 1. (2009). Enhanced real-time bioaerosol detection : atmospheric dispersion modeling and characterization of a family of wetted-wall bioaerosol sampling cyclones. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2009-08-287

Chicago Manual of Style (16^th Edition):

Hubbard, Joshua Allen, 1982-. “Enhanced real-time bioaerosol detection : atmospheric dispersion modeling and characterization of a family of wetted-wall bioaerosol sampling cyclones.” 2009. Doctoral Dissertation, University of Texas – Austin. Accessed March 07, 2021. http://hdl.handle.net/2152/ETD-UT-2009-08-287.

MLA Handbook (7^th Edition):

Hubbard, Joshua Allen, 1982-. “Enhanced real-time bioaerosol detection : atmospheric dispersion modeling and characterization of a family of wetted-wall bioaerosol sampling cyclones.” 2009. Web. 07 Mar 2021.

Vancouver:

Hubbard, Joshua Allen 1. Enhanced real-time bioaerosol detection : atmospheric dispersion modeling and characterization of a family of wetted-wall bioaerosol sampling cyclones. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2009. [cited 2021 Mar 07]. Available from: http://hdl.handle.net/2152/ETD-UT-2009-08-287.

Council of Science Editors:

Hubbard, Joshua Allen 1. Enhanced real-time bioaerosol detection : atmospheric dispersion modeling and characterization of a family of wetted-wall bioaerosol sampling cyclones. [Doctoral Dissertation]. University of Texas – Austin; 2009. Available from: http://hdl.handle.net/2152/ETD-UT-2009-08-287

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