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Full-Text Articles in Engineering
An Experimental Study Of Potential Residential And Commercial Applications Of Small-Scale Hybrid Power Systems, Michael Anthony Acosta
An Experimental Study Of Potential Residential And Commercial Applications Of Small-Scale Hybrid Power Systems, Michael Anthony Acosta
Theses and Dissertations - UTB/UTPA
The research presented in this thesis provides an understanding of small-scale hybrid power systems. Experiments were conducted to identify potential applications of renewable energy in residential and commercial applications in the Rio Grande Valley of Texas. Solar and wind energy converted into electric energy was stored in batteries and inverted to power common household and commercial appliances. Several small to medium size hybrid power systems were setup and utilized to conduct numerous tests to study renewable energy prospects and feasibility for various applications. The experimental results obtained indicate that carefully constructed solar power systems can provide people living in isolated …
A Study On Gas Penetration And Fingering Behavior In Injection Molding Of Polymer And Powder Metal Feedstock, Edna I. Orozco
A Study On Gas Penetration And Fingering Behavior In Injection Molding Of Polymer And Powder Metal Feedstock, Edna I. Orozco
Theses and Dissertations - UTB/UTPA
The effect of processing variables on the level of gas penetration in parts fabricated by gas-assisted injection molding from two different materials was compared. The materials used were polypropylene and stainless steel powder metal/thermoplastic feedstock. Software simulation and physical experiments were conducted. Taguchi analysis was used to reduce the number of experiment trials and to find the optimum processing conditions. Four different variables were changed using nine different combinations. The processing variables are the pressure, the delay time before gas is injected, the temperature of the material injected, and the amount of the material injected. The results showed that the …
The Implementation And Analysis Of Through Wall Radar Systems, Xiaohui Wang
The Implementation And Analysis Of Through Wall Radar Systems, Xiaohui Wang
Theses and Dissertations - UTB/UTPA
Through wall radar detecting, locating, imaging and tracking is a topic of current research interest in connection with law enforcement, urban area operations and search and rescue missions. Up to now, three different radar techniques are employed in through wall radar systems, including impulse through wall radar, continuous wave radar and swept frequency radar. In this thesis, we set out to give a comparison of these three kinds of through wall radar systems. First,we studied the challenges caused by the wall in through wall radar systems. Second,we implemented these three kinds of through wall radar system. In each kind of …
Asynchronous Designs On Fpga With Soft Error Tolerance For Security Algorithms, Deepya Reddy Nalubolu
Asynchronous Designs On Fpga With Soft Error Tolerance For Security Algorithms, Deepya Reddy Nalubolu
Theses and Dissertations - UTB/UTPA
Asynchronous methodologies, such as Null Convention Logic (NCL), have tremendous potential in implementing digital logic. It is essential to design complex asynchronous circuits using commercial Electronic Design Automation (EDA) tools. The main focus of this thesis is to design NCL circuits using VHDL and implementing them on FPGAs. The major contributions of this thesis include: 1) Developing a methodology of designing NCL circuits with VHDL and applying it successfully to all practical designs in this thesis. 2) As an example, the NCL circuit for DES (Data Encryption Standard) algorithm has been designed and simulated using VHDL and the implementation issues …
Uwb Antennas For Medical Imaging, Khabat Ebnabbasi
Uwb Antennas For Medical Imaging, Khabat Ebnabbasi
Theses and Dissertations - UTB/UTPA
Ultra-Wide Band (UWB) Microwave for imaging applications; especially in the medical field, is a new method to overcome the inherent invasive features of X-ray imaging. In this work a new systematic and detailed design for the Tapered Slot Antenna (TSA) as a UWB antenna in microwave imaging systems for medical applications is presented. Among TSAs, the Vivaldi antenna was selected and the reasons to replace the horn antenna imaging systems are illustrated. In the first chapter the previous designs for microwave imaging and the outline of this work are given, Chapter Two covers the design of the Vivaldi antenna's different …
An Automatic Regrouping Mechanism To Deal With Stagnation In Particle Swarm Optimization, George I. Evers
An Automatic Regrouping Mechanism To Deal With Stagnation In Particle Swarm Optimization, George I. Evers
Theses and Dissertations - UTB/UTPA
Particle Swarm Optimization (PSO), which was intended to be a population-based global search method, is known to suffer from premature convergence prior to discovering the true global minimizer. In this thesis, a novel regrouping mechanism is proposed, which aims to liberate particles from the state of premature convergence. This is done by automatically regrouping the swarm once particles have converged to within a pre-specified percentage of the diameter of the search space. The degree of uncertainty inferred from the distribution of particles at premature convergence is used to determine the magnitude of the regrouping per dimension. The resulting PSO with …
Thermodynamic, Heat Transfer Analysis And Simulation Of A Domestic Size, Double Stage, Lithium Bromide Absorption System, Carlos R. Lima
Thermodynamic, Heat Transfer Analysis And Simulation Of A Domestic Size, Double Stage, Lithium Bromide Absorption System, Carlos R. Lima
Theses and Dissertations - UTB/UTPA
The research presented in this thesis provides an investigation into the thermodynamic and heat transfer requirements for a, 3 ton, Water / Lithium-Bromide absorption system. Thermodynamics results for one stage and two stages absorption system are presented. Heat transfer principles provided a design guideline. Flat-plate, solar, water heaters and auxiliary devices using natural gas were analyzed as the main sources for energy inputs into the generator. Experimental data from the solar collector is provided under several configurations. A TRNSYS simulation of the overall absorption, cooling systems and its alternative energy means provided different scenarios where heating loads into the generator …