Evolutionary View Planning For Optimized Uav Terrain Modeling In A Simulated Environment, 2016 Brigham Young University
Evolutionary View Planning For Optimized Uav Terrain Modeling In A Simulated Environment, Ronald A. Martin, Ivan Rojas, Kevin W. Franke, John Hedengren
All Faculty Publications
This work demonstrates the use of genetic algorithms in optimized view planning for 3D reconstruction applications using small unmanned aerial vehicles (UAVs). The quality of UAV site models is currently highly dependent on manual pilot operations or grid-based automation solutions. When applied to 3D structures, these approaches can result in gaps in the total coverage or inconsistency in final model resolution. Genetic algorithms can effectively explore the search space to locate image positions that produce high quality models in terms of coverage and accuracy. A fitness function is defined, and optimization parameters are selected through semi-exhaustive search. A novel simulation ...
Phylogenetic And Experimental Characterization Of An Acyl-Acp Thioesterase Family Reveals Significant Diversity In Enzymatic Specificity And Activity, Fuyuan Jing, David C. Cantu, Jarmila Tvaruzkova, Jay P. Chipman, Basil J. Nikolau, Marna D. Yandeau-Nelson, Peter J. Reilly
Background: Acyl-acyl carrier protein thioesterases (acyl-ACP TEs) catalyze the hydrolysis of the thioester bond that links the acyl chain to the sulfhydryl group of the phosphopantetheine prosthetic group of ACP. This reaction terminates acyl chain elongation of fatty acid biosynthesis, and in plant seeds it is the biochemical determinant of the fatty acid compositions of storage lipids.
Results: To explore acyl-ACP TE diversity and to identify novel acyl ACP-TEs, 31 acyl-ACP TEs from wide-ranging phylogenetic sources were characterized to ascertain their in vivo activities and substrate specificities. These acylACP TEs were chosen by two different approaches: 1) 24 TEs were ...
Carbon Nanoadditives To Enhance Latent Energy Storage Of Phase Change Materials, 2016 University of Dayton
Carbon Nanoadditives To Enhance Latent Energy Storage Of Phase Change Materials, Shadab Shaikh, Khalid Lafdi, Kevin P. Hallinan
Latent energy storage capacity was analyzed for a system consisting of carbon nanoparticlesdopedphase changematerials (PCMs). Three types of samples were prepared by doping shell wax with single wall carbon nanotubes(SWCNTs), multiwall CNTs, and carbon nanofibers. Differential scanning calorimetry was used to measure the latent heat of fusion. The measured values of latent heat for all the samples showed a good enhancement over the latent heat of pure wax. A maximum enhancement of approximately 13% was observed for the wax/SWCNT composite corresponding to 1% loading of SWCNT. The change in latent heat was modeled by using an approximation for ...
Scale-Up Effects Of Co2 Capture By Methylethanolamine (Mdea) Solutions In Terms Of Loading Capacity, 2016 Instituto Superior Engenharia Lisboa
Scale-Up Effects Of Co2 Capture By Methylethanolamine (Mdea) Solutions In Terms Of Loading Capacity, João F. Gomes
João F Gomes
No abstract provided.
Reductive Decomposition Of Calcium Sulfate With Carbon Monoxide: Reaction Mechanism, 2016 Iowa State University
Reductive Decomposition Of Calcium Sulfate With Carbon Monoxide: Reaction Mechanism, Jae Seung Oh, Thomas D. Wheelock
Thomas D. Wheelock
When CaS04 was treated with a mixture of CO, COz, SOz, and Nz at 1150 "C in thermogravimetric analysis equipment, various reaction stages were identified, and the final product distribution was found to depend on the reducing potential (Pco/PcoJ of the gases. At low reducing potentials (_<0.10), the CaS04 was completely converted to CaO. At moderate reducing potentials (Le., 0.20), CaS04 was converted rapidly to CaO, which was then converted more slowly to Cas. The rate-controlling mechanisms seemed to differ markedly for the earlier and final reaction stages.
Role Of Induction Time And Other Properties In The Recovery Of Coal From Aqueous Suspensions By Agglomeration With Heptane, C.W. Fan, Y.C. Hu, R. Markuszewski, Thomas D. Wheelock
Thomas D. Wheelock
The percent recovery of fine coal or graphite particles suspended in water by agglomeration with heptane was highly dependent on the measured induction time, i.e., the gas bubble to particle attachment time of the material. The induction time was found to correlate closely with the heat of immersion of the solids in water, another indicator of the hydrophobic/hydrophilic character of the material. For a series of coals and graphite, the agglomeration recovery decreased exponentially with increasing induction time. For the more oleophilic coal or graphite particles, an increase in salt (NaC1) concentration of the suspending medium caused an ...
Influence Of Socio-Demography And Operating Streetscape On Last-Mile Mode Choice, M. Meng, P. P. Koh, Y. D. Wong
Journal of Public Transportation
This study investigated how personal and operational factors (travel distance and streetscape) influence traveler mode choice decisions for the last-mile home-bound trip stage from rail transit stations. Personal factors include the socio-demography of travelers, and attributes of the streetscape include the built environment (degree of areal development), prevalence of cycling, availability of short-range transport modes, and walking/cycling infrastructure. Interviewers randomly intercepted pedestrians to administer a mode choice survey at five rail transit station exits and engaged all available cyclists at bicycle parking areas in the vicinity of stations in Singapore. A multimodal logit regression model revealed a significant relationship ...
Fluid Analysis In Solar Heat Pipes, 2016 California Polytechnic State University, San Luis Obispo
Fluid Analysis In Solar Heat Pipes, Ben Krumholz, Michael Agavo, William Dundon
Evacuated tube solar collectors are efficient systems that use heat pipes to facilitate heat transfer. They use incoming solar radiation to heat water. Professor Mason Medizade tasked the team with choosing a component of the system to research and test its influence on system performance. The team investigated the working fluid that runs through the heat pipes. Distilled water, acetone, and ethanol at a range of fill volumes form 1 mL to 11 mL were tested. The team's goal was to find a volume for each fluid to maximize performance of the system. Performance was defined as average temperature ...
Biodegradable Magnesium Alloys For Orthopaedic Applications: A Review On Corrosion, Biocompatibility And Surface Modifications., 2016 CREST, Dublin Institute of Technology
Biodegradable Magnesium Alloys For Orthopaedic Applications: A Review On Corrosion, Biocompatibility And Surface Modifications., Sankalp Agarwal, James Curtin, Brendan Duffy, Swarna Jaiswal
Magnesium (Mg) and its alloys have been extensively explored as potential biodegradable implant materials for orthopaedic applications (e.g. Fracture fixation). However, the rapid corrosion of Mg based alloys in physiological conditions has delayed their introduction for therapeutic applications to date. The present review focuses on corrosion, biocompatibility and surface modifications of biodegradable Mg alloys for orthopaedic applications. Initially, the corrosion behaviour of Mg alloys and the effect of alloying elements on corrosion and biocompatibility is discussed. Furthermore, the influence of polymeric deposit coatings, namely sol-gel, synthetic aliphatic polyesters and natural polymers on corrosion and biological performance of Mg and ...
Thermal Treatment Of Electronic Waste In A Fluidised Bed And Chemical Digestion Of Solid Products, 2016 Cracow University of Technology, Poland
Thermal Treatment Of Electronic Waste In A Fluidised Bed And Chemical Digestion Of Solid Products, Amelia Woynarowska, Witold Zukowski, Sylwester Żelazny
Metal Assisted Chemical Etching, 2016 Quattrone Nanofabrication Facility
Metal Assisted Chemical Etching, Inayat Bajwa
Protocols and Reports
No abstract provided.
Particle Entrainment Studies From Dry And Wet Bed, 2016 The University of Western Ontario
Particle Entrainment Studies From Dry And Wet Bed, Saber Ayatollahi
Electronic Thesis and Dissertation Repository
During the Fluid Coking Process™ bitumen is sprayed into a fluidized bed of hot coke particles. The bitumen undergoes thermal cracking and is converted into gasses, condensable vapors, and solid coke, which deposits on the coke particles. These vapors rise through the vessel and result in entrainment of coke particles. Wet fine coke particles from the freeboard region enter the cyclone and contribute to the fouling of the Coker cyclones which can lead to the premature shut-down of Fluid Cokers.
The primary objective of this research is to determine how bed wetness affects entrainment.
First, a new fluidized bed was ...
Hydrodynamics And Mass Transfer In Bubble Columns, 2016 Washington University in St. Louis
Hydrodynamics And Mass Transfer In Bubble Columns, Onkar N. Manjrekar
Engineering and Applied Science Theses & Dissertations
Bubble columns and slurry bubble columns are multiphase reactors used for a wide range of applications in the biochemical, chemical, petrochemical, and metallurgical industries. In spite of their widespread usage, the scale-up of bubble columns remains an ongoing challenge. Various scale-up approaches, based on concepts ranging from ideal mixing to complex 3-D multiphase CFD models, have been used for assessing the effect of column size and gas and liquid flow rates on column hydrodynamics and reactor performance. Among these approaches, phenomenological models based on either single-class or multi-class bubbles that were validated on cold flow systems have been successful in ...
Development Of Steady-State And Dynamic Flux Models For Broad-Scope Microbial Metabolism Analysis, 2016 Washington University in St. Louis
Development Of Steady-State And Dynamic Flux Models For Broad-Scope Microbial Metabolism Analysis, Lian He
Engineering and Applied Science Theses & Dissertations
Flux analysis techniques, including flux balance analysis (FBA) and 13C-metabolic flux analysis (MFA), can characterize carbon and energy flows through a cells metabolic network. By employing both 13C-labeling experiments and nonlinear programming, 13C-MFA provides a rigorous way of examining cell flux distributions in the central metabolism. FBA, on the other hand, gives a holistic review of optimal fluxomes on the genome scale. In this dissertation, flux analysis techniques were constructed to investigate the microbial metabolisms.
First, an open-source and programming-free platform of 13C-MFA (WUFlux) with a user-friendly interface in MATLAB was developed, which allowed both mass isotopomer distribution (MID) analysis ...
Microstructure And Rheology Of Carbon Nanotubes At Air-Water Interfaces, 2016 University of Connecticut - Storrs
Microstructure And Rheology Of Carbon Nanotubes At Air-Water Interfaces, Charles D. Young
Honors Scholar Theses
This work characterizes the material properties of carbon nanotubes at air-water interfaces for potential use in creating stable emulsions. Properties such as length, aspect ratio, contact angle, microstructural ordering, surface pressure, compression and shear elastic moduli, stresses, surface viscosities and non-linearity are explored. Challenges such as deviation from a classical analysis of monolayers are encountered in the form of aggregation, mechanical contributions, and interface relaxation. These factors are taken into account to explain experimental measurements and trends. Ultimately, existing models for more homogeneous systems are resolved with observations to offer insight and areas of promise moving forward.
Hybrid Sulfur Process For Solar Production Of Hydrogen, 2016 University of South Carolina - Columbia
Hybrid Sulfur Process For Solar Production Of Hydrogen, John Jacob Isenhower, Katherine Cross Henderson, Nicholas Joseph Eigenbrot
Theses and Dissertations
Lowering dependence on fossil-based fuels has become a major area of focus in research, especially in transportation fuels. One particularly interesting field is that of hydrogen production. Hydrogen is promising because it has the potential to emit no greenhouse gases when used as fuel and is an excellent vessel for energy storage. Because traditional methods for its generation are inefficient and require nonrenewable fuel use, researchers have begun to focus on thermochemical cycles.
Thermochemical cycles are systems that require heat transfer intrinsically and do not consume fossil fuels nor emit greenhouse gases if renewable energy is used for heating. The ...
Investigation On Effect Of Acid Wash With Thermocol Ball On Physical Properties Of Knitted Garments, 2016 World University of Bangladesh (WUB)
Investigation On Effect Of Acid Wash With Thermocol Ball On Physical Properties Of Knitted Garments, Elias Khalil
Bed Agglomeration Behavior In A Bubbling Fluidized-Bed Combustor, 2016 The University of Western Ontario
Bed Agglomeration Behavior In A Bubbling Fluidized-Bed Combustor, Ehsan Ghiasi
Electronic Thesis and Dissertation Repository
Agglomeration is a major operational problem during the combustion of biomass containing a high amount of alkali compounds. The agglomerate formation is mainly due to the presence of alkali elements in biomass ashes that form low-melting compounds in the combustion.
In the first part of this project, the critical amount of liquid that would lead to a severe agglomeration/de-fluidization was studied and determined in a lab scale bubbling fluidized bed (BFB) heated at elevated temperatures. To simulate the biomass ashes, various percentages of KCl and KCl-K2SO4 compounds at eutectic composition were mixed with silica sand as ...
Catalytic Co2 Hydrogenation - Literature Review: Technology Development Since 2014, 2016 University of Wyoming
Catalytic Co2 Hydrogenation - Literature Review: Technology Development Since 2014, Drayson Bratt
Chemical Engineering Plan B
Global atmospheric carbon dioxide (CO2) concentration from fossil fuel combustion has generated much concern because of the several environmental issues associated with high levels of atmospheric CO2, a major greenhouse gas. In order to reduce the risks associated with global warming, the increase in atmospheric CO2 concentration must be prevented. CO2 capture and conversion not only mitigates the risks associated with increasing CO2 concentration in the atmosphere, but also addresses the problem of fossil fuel depletion by providing sustainable production of industrial demanded fuels and chemicals.
This literature review analyzes several of the most promising ...
Particle Image Velocimetry Design & Installation, 2016 University of Arkansas, Fayetteville
Particle Image Velocimetry Design & Installation, Zach Ritchie
Mechanical Engineering Undergraduate Honors Theses
This work will mainly focus on the design, construction, and installation of the Particle Image Velocimetry (PIV) system in the Chemical Hazards Research Center wind tunnel. The PIV system utilizes a Class IV (double pulsed) laser, optics to produce a light sheet, timing circuitry, and a high-resolution camera (with buffered output) to measure a system’s velocity (two-dimensional) field by determining the displacement of particles over the time between laser pulses. For maximum mobility and functionality, the PIV system was installed in the center of the tunnel on a moveable cart with the laser and camera mounted to an adjustable ...