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Articles 1 - 30 of 52
Full-Text Articles in Engineering
A Literature Review On Privacy And Security In Virtual Reality And Augmented Reality, Yunus Gumbo
A Literature Review On Privacy And Security In Virtual Reality And Augmented Reality, Yunus Gumbo
Master of Science in Information Technology Theses
As technologies become more advanced and powerful each day, the progression towards embracing virtual reality environments in our daily activities become more real, and subsequently, the boundaries between virtual and physical worlds more in question. However, several issues continue to persist as the world around us changes – privacy and security. In this paper we are going to analyze in detail, the newer virtual reality (VR) and augmented reality (AR) applications, the privacy risks associated with these environments, current solutions – their benefits and challenges as well as potential newer solutions which can be implemented to increase privacy protection.
There …
A Hydropower Facility As An Energy Water Signal Processor, Asha Shibu
A Hydropower Facility As An Energy Water Signal Processor, Asha Shibu
Doctoral Dissertations
In recent times, various efforts have been made to address the challenge of adequately representing hydropower systems in modeling frameworks, accounting for the lack of data to represent the multiple constraints in hydropower operation. This research is a pilot data-driven methodology for characterizing, classifying, and comparing the water-to-energy and energy-to-water signal transformations that hydropower facilities as signal processors accomplish. In this study, a Box Jenkins transfer function/noise model is used to identify the relationship between reservoir inflows and outflows. For examining the feasibility of this methodology, 5-minute fleet data for five storage and five run-of-river facilities was provided by the …
An Exploration Into The Design Of A Portable Music Player For People With Alzheimer’S And Dementia, Jaxon V. Silva
An Exploration Into The Design Of A Portable Music Player For People With Alzheimer’S And Dementia, Jaxon V. Silva
Liberal Arts and Engineering Studies
An exploration into the design of a portable music player for people with Alzheimer's and dementia.
Investigation Of Gaas Double Heterostructures For Photonic Heat Engines, Nathan Giannini-Hutchin
Investigation Of Gaas Double Heterostructures For Photonic Heat Engines, Nathan Giannini-Hutchin
Optical Science and Engineering ETDs
The creation of a laser cooled semiconductor device has been a long sought achievement. GaAs-based devices have emerged as a promising candidate for the realization of this goal. Efforts to improve the efficiency of such devices have enabled the material to exhibit external quantum efficiencies (EQE, a measure of the probability that an excitation leads to the emission of a photon) of 99.5\%. Despite this impressive feat, a laser coolable device remains elusive.
To investigate the obstacles to such a device, the material characteristics of GaAs-based double heterostructures (DHS) are theoretically and experimentally examined. Through this study, a GaAs $\vert$ …
Novel Hitch Cargo Cart, Cesilio Sanchez Ramirez, Lance Haidet, Richard Lontoc, Tyler Selinka
Novel Hitch Cargo Cart, Cesilio Sanchez Ramirez, Lance Haidet, Richard Lontoc, Tyler Selinka
Mechanical Engineering
This document presents the engineering design process used to develop, manufacture, and test a new and improved iteration of a hitch cart prototype. This process was performed by a team of four mechanical engineering seniors as part of California Polytechnic State University, San Luis Obispo’s senior design pathway. The goal of this project was to develop a sturdy and reliable iteration of our sponsor’s hitch cart prototype, that integrated the functionality of a vehicle hitch cargo platform and that of a height adjustable cargo cart into a single streamlined and easy to use product. This design could be used by …
Study Of Sustainable Development In Paper, Printing And Packaging Material Applications To Support Circular Economy, Prashant Ramesh Kotkar
Study Of Sustainable Development In Paper, Printing And Packaging Material Applications To Support Circular Economy, Prashant Ramesh Kotkar
Dissertations
To support circular economy and sustainability, the use of suitable material in paper, printing, and packaging industries, for several types of industrial printing material and printed product applications, plays a significant role for end user applications. Several types of packaging printing materials, specifically those finished with different printing technologies and exposed to different environmental conditions are targeted.
The purpose of this research study is to improve design and evaluation for paper, printing, and packaging material sustainability in end-user applications, to deal with the addressed sustainability issues brought by the paper, printing and packaging products end user groups. As the impacts …
Investigation Of Laser And Nonlinear Properties Of Anderson Localizing Optical Fibers, Cody Ryan Bassett
Investigation Of Laser And Nonlinear Properties Of Anderson Localizing Optical Fibers, Cody Ryan Bassett
Optical Science and Engineering ETDs
In this dissertation, I investigate the possibility of lasing and nonlinear phenomena in completely solid-state transverse Anderson localizing optical fibers (TALOFs). I examine three areas within this range of topics. The research in nonlinear phenomena focuses on four-wave mixing (FWM). FWM is of high interest in TALOFs due to the fact that guided localized modes of the fiber each have different propagation constants, and thus unique possible FWM pairs can be generated from the same input pump beam. I demonstrate the generation of FWM in the TALOF by pumping it with 532 nm light into a localized mode and observing …
Applications Of Temperature Transient Analysis For Reservoir Surveillance, Refaat Galal Aboelfotoh Hashish
Applications Of Temperature Transient Analysis For Reservoir Surveillance, Refaat Galal Aboelfotoh Hashish
LSU Doctoral Dissertations
Reservoir monitoring is a key factor in the management of oil and gas resources. With the recent developments of permanent downhole temperature monitoring tools such as Fiber-Optic Distributed Temperature Sensing (FO-DTS), temperature transient analysis has evolved as a new alternative for reservoir monitoring. In this work, different techniques of temperature data analysis are presented for monitoring and characterization of hydrocarbon and geologic carbon storage (GCS) reservoirs. The objective of this study is to present new approaches that enable monitoring injection profile through vertical and horizontal injection wells using temperature warmback analysis. Application of temperature warmback analysis is also extended for …
Research On Safe Return To Port Capability Of Large Ships And Its Key Factors, Tian Wu
Research On Safe Return To Port Capability Of Large Ships And Its Key Factors, Tian Wu
World Maritime University Dissertations
No abstract provided.
Ultrashort Pulse Laser Filamentation Electrical And Optical Diagnostic Comparison, James E. Wymer
Ultrashort Pulse Laser Filamentation Electrical And Optical Diagnostic Comparison, James E. Wymer
Optical Science and Engineering ETDs
Results presented here examine the effect of changing gas pressure on the radio frequency (RF) emissions of an ultrashort pulse laser filament plasma and how those emissions vary longitudinally in the laser focal region. We use a WR284 rectangular waveguide with a 1.5 cm hole that allows the beam through. A 3.2 GHz microwave signal is emitted in the waveguide, and signals are received through a waveguide-to-coax antenna connected to an HP8470B Schottky diode. By enabling and disabling the 3.2 GHz signal, we measure both the self-emitted RF from a USPL filament and subsequently the degree of attenuation a filament …
Integrated Grating Couplers On-A-Chip: Characterizations And Applications, Xuemei Wang
Integrated Grating Couplers On-A-Chip: Characterizations And Applications, Xuemei Wang
Optical Science and Engineering ETDs
We demonstrate two applications based on grating coupled phase matching to a slab waveguide: lab-on-a-chip spectrometer using a transversely chirped grating and indoor lidar plenoptic sensor array for Time of flight (ToF) position mapping system. In the first application, a chirped grating waveguide coupler serves as a spatially dependent narrow-band filter. The transversely-chirped-input grating is fabricated on a SiO2-Si3N4-SiO2 waveguide atop a Si substrate by interferometric lithography. Light with wavelength from 400- nm to 700 nm couples into Si3N4 waveguide through transversely chirped grating incident at a 33.5⁰ angle and …
Atomic Gradiometry Based On The Interference Of Microwave Optical Sidebands, Kaleb L. Campbell
Atomic Gradiometry Based On The Interference Of Microwave Optical Sidebands, Kaleb L. Campbell
Optical Science and Engineering ETDs
We describe a novel pulsed magnetic gradiometer based on the optical interference of sidebands generated using two spatially separated alkali vapor cells. The sidebands are produced with high efficiency using parametric frequency conversion of a probe beam interacting with Rubiduim 87 atoms in a coherent superposition of magnetically sensitive hyperfine ground states. First, experimental evidence of the sideband process is described for both steady-state and pulsed operation. Then, a theoretical framework is developed that accurately models sideband generation based on density matrix formalism. The gradiometer is then constructed using two spatially separated vapor cells, and a beat-note is generated. The …
Tunable Passive Shock And Vibration Isolators For Rotational Isolation, Chase B. Lemaire
Tunable Passive Shock And Vibration Isolators For Rotational Isolation, Chase B. Lemaire
LSU Master's Theses
Shock and vibration isolation are a critical need in helmets, which are widely used to protect athletes, workers, soldiers, and astronauts. Passive vibration isolation systems are a good option when mass and volume should be minimized and when the experienced loadings can be predicted. However, it is frequently challenging to find materials and structures which exhibit the optimal vibration and impact isolation properties for an application. As a case study illustrating a novel design paradigm for rotational shock absorption, a family of optimal solutions for the physical properties of American football helmets is presented. Lumped parameter Simulink models simulate a …
Gamma And Neutron Irradiation Effect On Ga-Polar And N-Polar Gan Based Diodes, Farnood Mirkhosravi
Gamma And Neutron Irradiation Effect On Ga-Polar And N-Polar Gan Based Diodes, Farnood Mirkhosravi
Optical Science and Engineering ETDs
III-nitride material (GaN) shows a lot of potential for next-generation power electronics. This material is advantageous due to its wide bandgap, high electron mobility, high thermal and mechanical stability, small form factor, and higher radiation tolerance. The higher radiation tolerance makes the GaN-based devices more attractive for harsh-environment applications, like aerospace, nuclear reactor, and fusion facilities, particle accelerators, and post-detonation environments applications.
GaN due to its unique crystal structure can be grown in different orientations and can provide specific advantages in electronic and optoelectronic devices. While the Ga-polar orientation of GaN has been widely investigated for its proprieties, there are …
Non-Destructive Material Analysis Of Metals And Composites Via Thermography, Jonathan R. Doubt, James L. Chapman
Non-Destructive Material Analysis Of Metals And Composites Via Thermography, Jonathan R. Doubt, James L. Chapman
Materials Engineering
The Naval Surface Warfare Center, Port Hueneme Division, is interested in the development of non-destructive damage assessment of shipboard materials via drones at distance. Long Pulsed Thermography (LPT), a method of non-destructive evaluation, was investigated as a possible method for detecting damage in metals (5005h24 Al alloy and 1008 carbon steel) and composites (aramid fiber honeycomb sandwich structure) at distances from 0.5 m to 3.0 m. LPT was conducted using two 1000 W can lights to heat the samples, and a FLIR E8-XT thermal camera. The images were then analyzed using ImageJ software to determine if damage could be detected …
Design Of A Proprioceptive Actuator Utilizing A Cycloidal Gearbox, Craig John Kimball
Design Of A Proprioceptive Actuator Utilizing A Cycloidal Gearbox, Craig John Kimball
Master's Theses
Legged robotics creates the demand for high torque compact actuators able to develop high instantaneous torque. Proprioceptive actuator design theory is a design theory that removes the need for a torque feedback device and relies on the stiffness in the leg for absorbing the high Ground Impact Forces created by walking locomotion. It utilizes a high torque density motor paired with a gearbox with a high gear ratio for torque multiplication. Previously work has been done to design a proprioceptive actuator design that utilizes a planetary gearbox to create a modular low-cost actuator for legged robotics. The purpose of this …
Eagle Medical Tray Denesting & Debris Removal Process, Nicholas Allen Ungefug, Noah Chavez, Susana Shu-Lin Okhuysen, Michael Augustine Pennington
Eagle Medical Tray Denesting & Debris Removal Process, Nicholas Allen Ungefug, Noah Chavez, Susana Shu-Lin Okhuysen, Michael Augustine Pennington
Industrial and Manufacturing Engineering
Eagle Medical Incorporated is a contract medical device packaging and sterilization company. The company purchases thermoformed medical packaging trays, which maintain the sterility of medical devices, from various manufacturers. To ensure packaging quality and to prevent cleanroom contamination, Eagle Medical inspects and sterilizes each blister tray that they order. This process is an essential non-value-added activity that creates a bottleneck. Cleanroom employees must stop packaging medical devices and attend to the processing of blister trays and packaging solutions. The blister trays arrive at Eagle’s facility in nested stacks. Vibration and movement during shipping further compresses the stacks, which makes separation …
An Ios Application For Visually Impaired Individuals To Assist With Crossing Roads, Ali Khan
An Ios Application For Visually Impaired Individuals To Assist With Crossing Roads, Ali Khan
Honors Theses
In day-to-day life, visually impaired individuals face the problem of crossing roads by themselves. This project was designed and built to solve this key issue. The system is supposed to give the user a warning before approaching a crosswalk for their safety and also give information about when it is safe to cross the road. An iOS application was developed to address the problem since recent studies have discovered that a vast number of visually impaired individuals are using smartphones (iPhones in particular) due to the ease and convenience it brings to their daily life. The application should be able …
Cable Transit De-Icing Project, Brooke Marvin, Christian Degrood, James Lavelle, Shanna Plouff
Cable Transit De-Icing Project, Brooke Marvin, Christian Degrood, James Lavelle, Shanna Plouff
General Engineering
Holmes Solutions has presented two projects that require similar solutions - ice removal from the Switchback and the Whoosh, with the Switchback’s cables currently being the primary focus. The Frost Fighters have been tasked to find a way to stop ice formation on the Switchback’s cables so that the ride can operate safely in cold climates and during the colder months of the year. To be an adequate solution, the chosen de-icing method must operate in temperatures from -10°C to 40°C and be on standby in temperatures from -40°C to 60°C. In addition, it must prevent any falling debris that …
Fire Protection And Life Safety Analysis Of A University Conference Center, Amanda Beck Larkin
Fire Protection And Life Safety Analysis Of A University Conference Center, Amanda Beck Larkin
Fire Protection Engineering: Culminating Experience Project Reports
This project report analyzes various aspects of fire protection and life safety design for a University Conference Center, for both prescriptive and performance-based designs. The University Conference Center is a ten-story, high-rise building comprised of various gathering spaces, ranging from small conference rooms to large assembly spaces with auditorium-style seating. The building has a large two-story podium with basement below, with a smaller floor plate, ten-story tower offset to one side.
In the prescriptive analysis, no deficiencies were noted in the water-based suppression or fire resistance analysis. The building construction type, height, area, number of stories, wall and structural ratings, …
8 Observatory Road- Fire Protection & Life Safety Analysis, Jeffrey Chiu
8 Observatory Road- Fire Protection & Life Safety Analysis, Jeffrey Chiu
Fire Protection Engineering: Culminating Experience Project Reports
A fire protection and life safety analysis was performed on the building “8 Observatory Road” located in Tsim Sha Tsui, Hong Kong. This analysis was performed as part of the fulfillment of requirements for Master of Science in Fire Protection Engineering degree from California Polytechnic State University, San Luis Obispo.
This report covers both a prescriptive and performance-based analysis. This building was designed and constructed in Hong Kong, adhering to the local codes and British Standard. For this report, the building was analyzed to the requirements of the International Building Code (IBC) and National Fire Protection Association (NFPA) Standards. For …
Fire Safety Management Plan For South Texas Project Turbine Generator Building, Brett Long
Fire Safety Management Plan For South Texas Project Turbine Generator Building, Brett Long
Fire Protection Engineering: Culminating Experience Project Reports
This report includes a fire protection and life safety analysis of the South Texas Project Turbine Generator Building (TGB). This analysis was done to fulfill the requirement for the Master of Science Degree in Fire Protection Engineering from California Polytechnic State University. The Turbine Generator Building consists of three elevations and is Type II-B construction. The TGB’s primary use is a special-purpose industrial building housing the turbine generator, main feed pumps, condensate pumps, condenser, feed water re-heaters, secondary cold chemistry lab, Balance-of-Plant (BOP) diesel, batteries, and switchgear, 13.8 kVA switchgear, and various other systems and components. This analysis consists of …
Mount Sac Gym & Aquatics Center: Fire & Life Safety Report, Alex Hoeft
Mount Sac Gym & Aquatics Center: Fire & Life Safety Report, Alex Hoeft
Fire Protection Engineering: Culminating Experience Project Reports
This report has been prepared to review and analyze the Fire and Life Safety status of the proposed Gym & Aquatics building at Mt. San Antonio College. This was done using two methods: prescriptive and performance based. The prescriptive section examines the explicitly code-mandated requirements for the building and the performance-based section examines implicit requirements for the building based on the goals presented in the Life Safety Code, NFPA 101.
The subject building is a 147,000 square foot, two-story, steel-framed athletics complex occupied primarily for assembly and business uses. The structure has an indoor and outdoor component with two gymnasiums …
Fire Protection Analysis Project – 9220 Zanzibar Lane Maple Grove, Mn, Brian Vandal
Fire Protection Analysis Project – 9220 Zanzibar Lane Maple Grove, Mn, Brian Vandal
Fire Protection Engineering: Culminating Experience Project Reports
This report contains an analysis of the life safety and fire protection features of a four-story apartment building in Maple Grove, Minnesota. The report is a part of the final project intended to meet the requirements for the Culminating Experience of the California Polytechnic Master of Science Fire Protection Engineering Program.
The apartment building chosen for the analysis is a mixed-use four-story wood-framed structure. The first floor of this structure includes office space for building management, a meeting space, and various electrical and mechanical spaces as well as apartments. There are exit stairways on each end of the structure extending …
Fire Protection And Life Safety Analysis Of The Adult Education Facility, William K.W. Bridges
Fire Protection And Life Safety Analysis Of The Adult Education Facility, William K.W. Bridges
Fire Protection Engineering: Culminating Experience Project Reports
The objective of this report is to provide an analysis of an existing building’s prescriptive-based and performance-based design methods. The intention is to provide the building owner with a working assessment of the building’s current life safety situation, as well as providing recommendations to improve the overall life safety and property protection of the selected building. This report is developed following the writing style and structure to meet the requirement for the Master of Science Degree in Fire Protection Engineering from California Polytechnic State University. The analysis includes an evaluation of the building owner’s fire and safety program for the …
Jack E Brown Chemical Engineering Building At Texas A&M University, Daniel Higdon
Jack E Brown Chemical Engineering Building At Texas A&M University, Daniel Higdon
Fire Protection Engineering: Culminating Experience Project Reports
The Jack E Brown Chemical Engineering building at Texas A&M is located in College Station, TX. While this building is dedicated to chemical engineering, it serves many different departments as they use the lecture halls on the first floor. It was built and opened in 2004 and has 206,500 square feet with 7 stories. The building consists of multiple labs as well as study hall rooms, computer labs, offices, and the normal MEP/storage rooms. Jack E Brown building is one of the foremost buildings of the Texas A&M engineering quadrant and is further proof that Texas A&M desires to keep …
Prescriptive And Performance-Based Analysis Of Colorado Liberal Arts College, Victor Wight
Prescriptive And Performance-Based Analysis Of Colorado Liberal Arts College, Victor Wight
Fire Protection Engineering: Culminating Experience Project Reports
This project consists of a prescriptive and performance-based analysis of an existing two-story college building. The building is located in downtown Colorado Springs, Colorado. Colorado Liberal Arts College is used for general education courses with the focus on creative fields such as dance, graphic design, and art. The building consists of classrooms, offices, an art gallery, dance studio, and a bookstore.
A prescriptive based design was completed using the code requirements laid out in the International Building Code (IBC) 2015 Edition and applicable National Fire Protection Association (NFPA) Codes. The prescriptive based analysis consisted of analyzing life safety and egress, …
Two-Storey Office Building, Colin Mallett
Two-Storey Office Building, Colin Mallett
Fire Protection Engineering: Culminating Experience Project Reports
This FPE 596 culminating project report was developed to meet the requirements for completion of the Fire Protection Master’s Program at Cal Poly. The report is intended to provide a detailed understanding of fire and building code requirements as well as describe both prescriptive and performance based approaches to human behavior in fire scenarios, building evacuation strategies, egress design and tenability analysis. An overall determination will be made to evaluate if the building provides the expected levels of safety for building occupants from fire.
The office building #211 was designed and constructed to be compliant with the International Building Code …
Process Support Building Savannah River Site, Victoria Zawacki
Process Support Building Savannah River Site, Victoria Zawacki
Fire Protection Engineering: Culminating Experience Project Reports
A report on the fire and life safety analysis of the Savannah River Site Process Support Building is required in order to receive a Master of Science in Fire Protection Engineering from the California Polytechnic State University, San Luis Obispo. The Process Support Building is a two-story office building that was first occupied in 2013, with a floor area of approximately 10,000 ft2. The building contains mainly personal offices, but also contains conference and turnover rooms, a Computer Simulation Room, an Observation Room, and a lunch area. The analysis includes both prescriptive and performance-based analysis.
The Process Support Building is …
Fire Protection And Life Safety Analysis Of Christopher Cohan Center, Kristen Dentici
Fire Protection And Life Safety Analysis Of Christopher Cohan Center, Kristen Dentici
Fire Protection Engineering: Culminating Experience Project Reports
This report analyzes the fire protection and life safety systems of the Christopher Cohan Center. The building was assessed from both a prescriptive and performance-based approach.
The prescriptive design analyzed the code requirements for the building based on the 2018 IBC, with some consideration for the codes in place at the time of construction. The prescriptive analysis main focus was on egress systems, fire alarm and detection, fire suppression, and structural fire protection. The egress analysis found that the exits and exit configuration were sufficient for the occupant loads that were calculated for the building. The fire alarm and detection …