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Articles 4411 - 4440 of 73521
Full-Text Articles in Engineering
Design Of Arbitrary Planar Optical Devices With Full Phase Control Using Nanoimprinting Of Refractive Index, Matthew Panipinto
Design Of Arbitrary Planar Optical Devices With Full Phase Control Using Nanoimprinting Of Refractive Index, Matthew Panipinto
All Theses
Planar optical devices offer a lightweight solution to the constraints found in traditional optical devices. While subwavelength patterning of optics offers attractive performance and size, traditional fabrication methods demand a trade-off between resolution and throughput that presents a significant hurdle for the widespread use of subwavelength devices. Nanoimprinting of refractive index (NIRI) is a novel fabrication method pioneered in previous work that offers promise in mitigating the throughput issues that hamstring traditional fabrication methods. However, NIRI has not been shown to impart full $2\pi$ phase control in planar optical devices, nor has a method for fabricating arbitrary designs using the …
Geology-Based Shear-Wave Velocity Model Of Reference Site Conditions In South Carolina For Seismic Site Response Analysis, Camilius Amevorku
Geology-Based Shear-Wave Velocity Model Of Reference Site Conditions In South Carolina For Seismic Site Response Analysis, Camilius Amevorku
All Dissertations
Assessing earthquake hazard in the State of South Carolina is important because it is one of the most seismically active regions of the eastern United States and has experienced earthquakes of damaging levels in the historical past. Examples of these damaging seismic events are the 1886 Charleston earthquake (M 6.7 to 7.5) and the 1913 Union County earthquake (M 4.5 to 5.5).
Small-strain shear-wave velocity (VS) is an important parameter in performing site response analysis. The deep nature of the top of reference firm rock (i.e., VS ≥ 760 m/s or B-C boundary) due to …
Multi-Robot Symbolic Task And Motion Planning Leveraging Human Trust Models: Theory And Applications, Huanfei Zheng
Multi-Robot Symbolic Task And Motion Planning Leveraging Human Trust Models: Theory And Applications, Huanfei Zheng
All Dissertations
Multi-robot systems (MRS) can accomplish more complex tasks with two or more robots and have produced a broad set of applications. The presence of a human operator in an MRS can guarantee the safety of the task performing, but the human operators can be subject to heavier stress and cognitive workload in collaboration with the MRS than the single robot. It is significant for the MRS to have the provable correct task and motion planning solution for a complex task. That can reduce the human workload during supervising the task and improve the reliability of human-MRS collaboration. This dissertation relies …
Iris Detection Authenticator, Nathan D. Tang, Bryan K. Chau
Iris Detection Authenticator, Nathan D. Tang, Bryan K. Chau
Electrical Engineering
The development of iris biometric identification recognition is presented. Iris recognition differs from other methods because data acquisition is non-physical and is more accessible. It has been proven that the iris does not change as an individual ages and is well protected from external damages due to the eyelid and cornea, acting as a shield to the iris. In addition, the iris is almost impossible to forge due to its complex patterns and the current limitations in technology. Using Canny Edge Detection, Hough Transform, rubber-sheet normalization, Histogram of Gradient feature extraction, and the MultiMedia University iris database as our subjects, …
Testing And Verification For The Open Source Release Of The Horizon Simulation Framewortesting And Verification For The Open Source Release Of The Horizon Simulation Framework, William J. Balfour
Testing And Verification For The Open Source Release Of The Horizon Simulation Framewortesting And Verification For The Open Source Release Of The Horizon Simulation Framework, William J. Balfour
Master's Theses
Modeling and simulation tools are exceptionally useful for designing aerospace systems because they allow engineers to test and iterate designs before committing the massive resources required for system realization. The Horizon Simulation Framework (HSF) is a time-driven modeling and simulation tool which attempts to optimize how a modeled system could perform a mission profile. After 15 years of development, the HSF team aims to achieve a wider user and developer base by releasing the software open source. To ensure a successful release, the software required extensive testing, and the main scheduling algorithm required protections against new code breaking old functionality. …
Fabrication Of Thin-Film Composite, Reverse-Osmosis Membranes With Polyethylenimine Modifications For Enhancing Membrane Fouling Resistance, Stephanie N. Hamilton
Fabrication Of Thin-Film Composite, Reverse-Osmosis Membranes With Polyethylenimine Modifications For Enhancing Membrane Fouling Resistance, Stephanie N. Hamilton
Master's Theses
Increasing water reuse opportunities for communities has become increasingly important as access to clean water is becoming more scarce. Reverse Osmosis (RO) is an advanced treatment technology used in water recycling wastewater for potable reuse applications. RO is a promising technology; however, the membranes have limitations including their high energy demand and their susceptibility to membrane fouling. The main objective of this study was to develop a reproducible method for the fabrication of RO membranes with enhanced flux and reduced susceptibility to fouling. Literature contains numerous publications on fabrication of thin film composite (TFC) RO membranes with high performance. However, …
Tidally Generated Internal Waves From Dual-Ridge Topography, Ian Derik Sanderson
Tidally Generated Internal Waves From Dual-Ridge Topography, Ian Derik Sanderson
Theses and Dissertations
Internal waves are generated in stratified fluids, like the ocean, where density increases with depth. Tides are one of the major generation mechanisms of internal waves. As the tides move water back and forth over underwater topography, internal waves can be generated. Topography slope and amplitude are major factors in the behavior of the generated internal wave field. In order to further understand the effects topographic shape plays, the effect of asymmetry on internal waves is investigated. This research investigates internal waves generated by dual-ridge topographies. Four cases of symmetric topographies, T, M, W, and W2, with three different peak …
Improvements To The Automatic Calibration Of Digital Focusing Color Schlieren Systems, Robert C. Frazee
Improvements To The Automatic Calibration Of Digital Focusing Color Schlieren Systems, Robert C. Frazee
LSU Master's Theses
As a diagnostic method, Schlieren imaging offers the unique ability to visualize flows with a completely non-intrusive method. By visualizing small changes in the refractive index of a fluid, Schlieren imaging is able to visualize changes in temperature, pressure, and composition. While historic Schlieren methods have been limited to providing largely qualitative information, modern Schlieren methods are able to extract quantitative information from flow phenomena. This is possible through either Background Oriented Schlieren (BOS) or Digital Focusing Color Schlieren (DFCS) methods. While BOS is relatively flexible, it requires a large amount of computational effort to process each frame of captured …
The Design Of A Point Of Care Fet Biosensor To Detect And Screen Covid-19, Nisreen Amer Mohammad Alnaji
The Design Of A Point Of Care Fet Biosensor To Detect And Screen Covid-19, Nisreen Amer Mohammad Alnaji
Theses
This work proposes and demonstrates a biosensor with reduced Graphene Oxide (rGO) based Field Effect Transistor (FET) for rapid and selective detection of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). The main objective of this thesis is to detect the SARS-CoV-2 spike protein antigen on spot selectively and rapidly. The rGO channel is coated with the spike protein antibodies to achieve selectivity. Moreover, the biosensing performance and specificity are governed by decorating the sensor’s channel with Metal Nanoparticles (MNPs) such as, copper, and silver. The designed sensor successfully detects the SARS-CoV-2 spike protein and shows singular electrical behavior for detection. …
Sludge-Based Activated Carbon: Characterization And Performance For Removal Of Methylene Blue From Aqueous Solution, Ahmad Anwar Al Madhoon
Sludge-Based Activated Carbon: Characterization And Performance For Removal Of Methylene Blue From Aqueous Solution, Ahmad Anwar Al Madhoon
Theses
Domestic wastewater treatment plants in the United Arab Emirates (UAE) produce 122 thousand tons of dried sludge annually. About 70% of this sludge is dumped in landfills, creating water and soil contamination. Sludge is an energy-rich organic material that could be converted into activated carbon by thermal or chemical processes. Potassium hydroxide has shown great potential as an activating agent for producing high-quality sludge based activated carbon (SBAC). However, its use adds to the cost of the production process. Thus, there is a need for an alternative activating agent that is not costly. One possible chemical is carbide lime which …
Biodegradable Heat Insulation Composites Based On Poly(Β-Hydroxybutyrate) And Date Palm Wood, Amal Ibrahim Mlhem
Biodegradable Heat Insulation Composites Based On Poly(Β-Hydroxybutyrate) And Date Palm Wood, Amal Ibrahim Mlhem
Theses
Residential buildings contribute the most to energy consumption. It was found that energy savings of 20% can be achieved through the thermal insulation of residential buildings in the United Arab Emirates. For this reason, research has been conducted in the field of sustainable thermal insulation materials. Wood-Plastic Composites (WPC) are a relatively new generation of biocomposites and are particularly suitable for construction and building applications, which offers high thermal and acoustic insulation properties., reducing carbon emissions and decreasing negative impacts on the environment due to their biodegradability, sustainability, renewability, and recyclability. The first part of this study investigated the thermal …
Analysis Of Wind Assisted Ship Propulsion Through 3d-Computational Fluid Dynamics: Application Of Rigid Wind Sails On A Bulk Carrier, Darnela Mboumba Mboumba
Analysis Of Wind Assisted Ship Propulsion Through 3d-Computational Fluid Dynamics: Application Of Rigid Wind Sails On A Bulk Carrier, Darnela Mboumba Mboumba
World Maritime University Dissertations
No abstract provided.
A Socio-Economic Analysis Of Automated Container Terminal (Act) Concept In Indonesia : Case Study : New Priok Container Terminal One, Febri Triana Hartami Siagian
A Socio-Economic Analysis Of Automated Container Terminal (Act) Concept In Indonesia : Case Study : New Priok Container Terminal One, Febri Triana Hartami Siagian
World Maritime University Dissertations
No abstract provided.
Comparative Analysis Of Cloud-Based Server And Conventional Server Of Simulators For Marine Engineering, Jose Maria Razon Nalus
Comparative Analysis Of Cloud-Based Server And Conventional Server Of Simulators For Marine Engineering, Jose Maria Razon Nalus
World Maritime University Dissertations
No abstract provided.
Preventing Variadic Function Attacks Through Argument Width Counting, Brennan Ward
Preventing Variadic Function Attacks Through Argument Width Counting, Brennan Ward
USF Tampa Graduate Theses and Dissertations
Format String attacks, first noted in June 2000 [1], are a type of attack in which anadversary has control of the string argument (the format string) passed to a string format function (such as printf). Such control allows the attacker to read and write arbitrary program memory. To prevent these attacks, various methodologies have been proposed, each with their own costs and benefits. I present a novel solution to this problem through argument width counting, ensuring that such format functions cannot access stack memory beyond the space where arguments were placed. Additionally, I show how this approach can be expanded …
Digital Readiness Of Container Terminals For Digital Technology Adoption: A Case Study Of Vietnam, Anh Tuấn Vu
Digital Readiness Of Container Terminals For Digital Technology Adoption: A Case Study Of Vietnam, Anh Tuấn Vu
World Maritime University Dissertations
No abstract provided.
The Ship-Port Interface Safety Management: Case Study Of Lng Ports And Marine Terminals In Algeria, Benyebka Cherigui
The Ship-Port Interface Safety Management: Case Study Of Lng Ports And Marine Terminals In Algeria, Benyebka Cherigui
World Maritime University Dissertations
No abstract provided.
Environmentally Balanced Approaches To Future Deep Seabed Mining, Jonatan J. Víctor Mendoza Alarcón
Environmentally Balanced Approaches To Future Deep Seabed Mining, Jonatan J. Víctor Mendoza Alarcón
World Maritime University Dissertations
No abstract provided.
The Determination Of Port Automation Levels Using An Analytic Hierarchical Process : A Case Study For The Port Of Colombo, Waruna Lasantha De Silva Amarathunga
The Determination Of Port Automation Levels Using An Analytic Hierarchical Process : A Case Study For The Port Of Colombo, Waruna Lasantha De Silva Amarathunga
World Maritime University Dissertations
No abstract provided.
The Impact Of The Digital Maturity Level On Port Operations In Africa, Joyce Wanjiru Kaburu
The Impact Of The Digital Maturity Level On Port Operations In Africa, Joyce Wanjiru Kaburu
World Maritime University Dissertations
No abstract provided.
Selection Of The Optimal Alternative Fuel In Terms Of The Sustainability Of The Shipping Industry Through The Multi-Attribute Decision Making, Kyungrok Kim
World Maritime University Dissertations
No abstract provided.
Integration Of A Hybrid Microgrid System Using Renewable Energy Sources: A Case Study Of Lagos Port Nigeria, Juliet Inze Amwe
Integration Of A Hybrid Microgrid System Using Renewable Energy Sources: A Case Study Of Lagos Port Nigeria, Juliet Inze Amwe
World Maritime University Dissertations
No abstract provided.
Barriers To Implementing Ports Energy Efficiency And Greenhouse Gas Emission Reduction Measures: Kenya’S Mombasa Port In Consideration, Alex Mwangome Mwakuni
Barriers To Implementing Ports Energy Efficiency And Greenhouse Gas Emission Reduction Measures: Kenya’S Mombasa Port In Consideration, Alex Mwangome Mwakuni
World Maritime University Dissertations
No abstract provided.
The Role Of Generation Iv Nuclear Reactors In Decarbonising International Shipping: A Multi-Criteria Decision Making (Mcdm) Framework For Matching Potential Decarbonisation Pathways To Different Ship Types And Size, Claudianus David Kunze
The Role Of Generation Iv Nuclear Reactors In Decarbonising International Shipping: A Multi-Criteria Decision Making (Mcdm) Framework For Matching Potential Decarbonisation Pathways To Different Ship Types And Size, Claudianus David Kunze
World Maritime University Dissertations
No abstract provided.
Evaluation Of The Operation Of Lighthouses And Beacons In The Gulf Of Suez, Tamer Saber Abdelhafez Elsayed
Evaluation Of The Operation Of Lighthouses And Beacons In The Gulf Of Suez, Tamer Saber Abdelhafez Elsayed
World Maritime University Dissertations
No abstract provided.
Energy Efficient Smart Port Development, Implementing Renewable Energy In A Port: A Case Study In Port Of Colombo, Sri Lanka, Darshana Sampath Kumara Habakkala Watawala Kankanange
Energy Efficient Smart Port Development, Implementing Renewable Energy In A Port: A Case Study In Port Of Colombo, Sri Lanka, Darshana Sampath Kumara Habakkala Watawala Kankanange
World Maritime University Dissertations
No abstract provided.
Remotely Piloted Aircraft Systems In The Maritime Sector, Marta Ibarra García
Remotely Piloted Aircraft Systems In The Maritime Sector, Marta Ibarra García
World Maritime University Dissertations
No abstract provided.
Exploring And Validating Risks Related To Containerization: Lessons For Vietnam, Minh Nhat Pham
Exploring And Validating Risks Related To Containerization: Lessons For Vietnam, Minh Nhat Pham
World Maritime University Dissertations
No abstract provided.
Business Model Innovation In Marine Engine Maintanance, Dofilia Sinangui Kaloia
Business Model Innovation In Marine Engine Maintanance, Dofilia Sinangui Kaloia
World Maritime University Dissertations
No abstract provided.
A Safety Analysis On The Potential Risks Onboard Ships That Would Use Ammonia As Marine Fuel, Praveen Raghavan Nair
A Safety Analysis On The Potential Risks Onboard Ships That Would Use Ammonia As Marine Fuel, Praveen Raghavan Nair
World Maritime University Dissertations
No abstract provided.