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Single Photon Avalanche Diode (Spad) Array Quenching And A Novel Quantum Random Number Generator (Qrng), Mano Rahul Kumar Pakalapati
Single Photon Avalanche Diode (Spad) Array Quenching And A Novel Quantum Random Number Generator (Qrng), Mano Rahul Kumar Pakalapati
Theses and Dissertations
Single Photon Avalanche Diodes, SPADs is a single-photon sensitive light detector with capabilities of pico-second timing resolutions and offer potential for enhancing various fields of science to evolve into quantum-age. SPAD has applications ranging from quantum computing, cryptography (QKD) to applications in medicine such as neural imaging and Single Photon Emission Computed Tomography (SPECT). SPAD arrays are gaining popularity as they enable for parallel photon detection and 3D imaging. To account for the process tolerances and aging, each SPAD-pixel needs a tunable quenching circuit in the frontend for post-fabrication fine-tuning, this research work presents a novel Dual Triggered Tunable Active …
Dual-Task Multimodal Web Browsing In Semi-Autonomous Vehicles, Jarrett William Clark
Dual-Task Multimodal Web Browsing In Semi-Autonomous Vehicles, Jarrett William Clark
Theses and Dissertations
Drivers should remain alert when operating semi-autonomous vehicles as human intervention is required when the automated systems fail, or an unusual situation is encountered. However, drivers do not always focus solely on the road and sometimes divert their attention to look at cell phones, laptops, tablet computers, or in-dash infotainment systems. In this research, software was created to enable operators of a simulated self-driving car to browse the Human-Centered Design Institute (HCDI) website using multimodal interaction. The software used synthesized speech to read the website aloud and visually highlighted the content on the screen as it was read. Web analytics …
Monitoring And Correlating Toxic Gases Emitted By Cars In Public Indoor Garage In Real-Time Using Internet Of Things (Iot), Khalid Altheiab
Monitoring And Correlating Toxic Gases Emitted By Cars In Public Indoor Garage In Real-Time Using Internet Of Things (Iot), Khalid Altheiab
Theses and Dissertations
The study was developed to adequately depict the behavior of indoor pollutant matter in public garages, the underlying factors influencing this behavior and gauge the pollutant exhaust emission patterns. In depicting the behavior of indoor pollutant matter, the research aimed at studying the emission-pollutant relationship and any variations in concentrations found at different locations within the study site. In terms of measuring the factors influencing the pollutant behavior, the research quantified the concentrations of four gaseous contaminants. The pollutant behavior was studied to better understand the different variables influencing the indoor air-quality. Finally, based on these parameters overall patterns in …
Optimization Of Cabin Design For Enhanced Passenger Experience, Golnoosh Torkashvand
Optimization Of Cabin Design For Enhanced Passenger Experience, Golnoosh Torkashvand
Theses and Dissertations
Passenger experience has been a recent focus of many airline industries. Airline manufacturers and businesses have noticed that in order to stay sustainable in the competition of the market, they need to understand passengers’ needs. Passenger experience, however, is a broad concept that requires more effort to understand. This research is an attempt towards understanding passenger experience and suggesting a framework toward enhancing it in long-haul flights. We consider an activity-centric approach toward redefining passenger experience and evaluating it. In addition, we employ Human-Centered Design (HCD) methodologies to grasp a better understanding of passengers’ perceptions of those activities. HCD is …
Mdt Geolocation Through Machine Learning: Evaluation Of Supervised Regression Ml Algorithms, Aria Canadell Solana
Mdt Geolocation Through Machine Learning: Evaluation Of Supervised Regression Ml Algorithms, Aria Canadell Solana
Theses and Dissertations
Minimizing Drive Test is a statistical protocol used to evaluate the network performance. It provides several benefits with respect to traditional drive test analysis; however, multiple inconveniences exist that prevent cell companies from precisely retrieving most of the locations of these reports. . MATLAB and Jupyter Notebook were used to prepare the data and create the models. Multiple supervised regression algorithms were tested and evaluated. The best predictions were obtained from the K-Nearest Neighbor algorithm with one ‘k’ and distance-weighted predictions. The UE geolocation was predicted with a median accuracy of 5.42 meters, a mean error of 61.62 meters, and …
Mathematical Model, Simulated Design And Experimental Results For Parabolic Mirror Based Multiplexer For Spatially Multiplexed Fiber Optic Communication Systems, Ce Su
Theses and Dissertations
Spatial Domain Multiplexing (SDM) is a multi-input multi-output (MIMO) architecture. It adds an innovative dimension to optical fiber communication systems by enabling spatial reuse of the optical frequencies. SDM utilizes radially distributed spatial locations for different input signals based on their input launch angles. These input channels propagate in a helical path inside the carrier fiber. These SDM input channels do not encounter any perceptible cross-talk or inter-symbol interference. The SDM system is similar to other optical communication systems. However, they require two added parts. These parts are the spatial multiplexer, also known as the Beam Combiner Module (BCM) and …
Performance Evaluation Of Speech Recognition System Using Conventional And Hybrid Features And Hidden Markov Model Classifier, Hussien Elharati
Performance Evaluation Of Speech Recognition System Using Conventional And Hybrid Features And Hidden Markov Model Classifier, Hussien Elharati
Theses and Dissertations
Extracting the auditory information from speech signal is considered a computationally demanding task. However, past researches in mathematics, acoustics, and speech technology have provided many methods for signal processing and modeling. Although, all methods have their strengths and weaknesses, but they remain a serious attempt towards speech recognition system. Using multivariate statistical machine learning (Hidden Markov Model), this work investigates the performance of selected conventional and new hybrid feature extraction algorithms in both clean and noisy environments. The resultant conventional features include MFCC, LPCC, PLP, and RASTA-PLP, while the new hybrid features include LPR, MLP, MLR, and MPR. The whole …
Air Quality Monitoring Wireless Sensor Network With Electrochemical Sensing Elements, Saeed Faisal Malky
Air Quality Monitoring Wireless Sensor Network With Electrochemical Sensing Elements, Saeed Faisal Malky
Theses and Dissertations
Harmful atmospheric pollutants have been attributed to causing adverse weather conditions and health problems, which are particularly prevalent in more populated global regions, such as megacities. Nongovernmental and international agencies throughout the world have likewise called for increased awareness and action to effectively counter the increased rates of air pollution, as the consequences seem ominous. Meanwhile, in several major urban landscapes such as Saudi Arabia, no modern apparatus or efficient systematic mechanisms exist for the qualitative detection of dangerous pollutants and gases. The current counterparts for hazardous gas measurements are expensive, bulky and cumbersome to set up. Thus, sensor devices …
Surface Phonon Polariton-Enhanced Ring Resonator And E-Plane Hybrid Ring Coupler, Cláudio Augusto Barreto Saunders Filho
Surface Phonon Polariton-Enhanced Ring Resonator And E-Plane Hybrid Ring Coupler, Cláudio Augusto Barreto Saunders Filho
Theses and Dissertations
Surface polaritons are known for providing the ability to confine light beyond the Abbe’s limit of diffraction. While metals efficiently support surface plasmon polaritons in the visible-UV spectrum, some semiconductors can support surface phonon polaritons in the infrared. Ring resonators are devices with high integration level with optical interconnects and with applications including filters, directional couplers, modulators and interferometers. Loss associated to ring curvature yields ring radius on the order of tens of free-space wavelengths. SPhP-enhanced micro-ring resonator was proposed and it was shown that ring dimensions are reduced. Advances in nanofabrication processes allow the design of optical interconnects using …
Integrating A Modified Pulse Amplitude Modulation (Pam4) Scheme With Two Spatially Multiplexed Channels In Optical Fiber Communication Systems, Bilas Chowdhury
Integrating A Modified Pulse Amplitude Modulation (Pam4) Scheme With Two Spatially Multiplexed Channels In Optical Fiber Communication Systems, Bilas Chowdhury
Theses and Dissertations
A multi-input multi-output (MIMO) based optical fiber multiplexing architecture known as Spatial Domain Multiplexing (SDM) adds a new dimension to optical fiber communication systems by spatially reusing the optical frequencies. SDM allocates different spatial location for different input signals based on the input launch angles. These input signals propagate helically inside the carrier fiber. They abide total internal reflection and exit as concentric donut shaped rings while travelling the fiber. These SDM channels do not exhibit any crosstalk or intersymbol interference. SDM systems can also complement different modulation techniques such as Return to Zero (RZ), Non-Return to Zero (NRZ), and …
Establishing A People Qualification Framework At Embraer Executive Aircraft, Inc., Yassine Rayad
Establishing A People Qualification Framework At Embraer Executive Aircraft, Inc., Yassine Rayad
Theses and Dissertations
Technical training in the aviation industry is a multi-faceted and complex topic. Research efforts in aviation maintenance training are extensive, however, we observe a paucity of studies directly focused on aircraft manufacturing environments. Nevertheless, the recent growth of the training industry and the advent of more disruptive technologies such as virtual and augmented reality solutions are making training program design efforts more and more relevant. The research and design contributions presented in this thesis focus on the establishment of a people qualification framework at a local aircraft final assembly and testing plant in Melbourne, FL. The design thinking cycle was …
Calibration Of The Rapidscat Microwave Brightness Temperature, Ali Al-Sabbagh
Calibration Of The Rapidscat Microwave Brightness Temperature, Ali Al-Sabbagh
Theses and Dissertations
NASA RapidScat is the first satellite scatterometer that flown in non-Sun-synchronous orbit. Its unique orbit enabled collocated measurements with multiple satellite remote-sensing instruments that usually fly in Sun-synchronous orbits. RapidScat’s primary mission was retrieval of global ocean wind vectors from normalized radar backscatter measurements. The instrument operated onboard the International Space Station between September 2014 and August 2016 covering latitude range between ±51.6ᵒ . To serve as a cross-calibration reference with other instruments, RapidScat must be internally calibrated. This dissertation presents the first radiometric calibration of RapidScat brightness temperature measurements and describes the process that combines RapidScat’s active/passive mode, simultaneously …
A Queueing Theory-Based Modeling And Performance Analysis Of Push-To- Talk Over Cellular Networks, Hisham Zorghani
A Queueing Theory-Based Modeling And Performance Analysis Of Push-To- Talk Over Cellular Networks, Hisham Zorghani
Theses and Dissertations
Public Safety organizations play a vital role in emergencies. Their ultimate goal is to protect people and save lives and properties during disasters. Public safety communities have been using narrowband Trunking systems for their communications for decades. These systems were designed with only voice communications in mind. Even though these narrowband systems have gone throughout many enhancement phases, yet their data capabilities are still limited. Long Term Evolution (LTE) has been selected by many countries including the United States to be the platform for next-generation Public Safety Networks(PSN). The 3GPP LTE standard is all-IP architecture mainly developed to boost its …
Rapidscat Backscatter Measurements Calibration, Ruaa Alsabah
Rapidscat Backscatter Measurements Calibration, Ruaa Alsabah
Theses and Dissertations
Scatterometers are microwave radars deployed to estimate global wind speeds and directions over sea surface by measuring Normalized Radar Cross Section (σᵒ) of the sea. Measured is determined by the sea surface roughness that is modulated mostly by wind, thus establishing a relationship between and wind conditions. Wind vectors are retrieved by inverting an empirical Geophysical Model Function that relates measured to a wind vector (speed and direction) and radar measurement configuration (polarization, incidence, and azimuth angle). Careful scatterometer calibration is required for accurate wind retrieval. RapidScat is a National Aeronautics and Space Administration (NASA) Ku-Band scatterometer that was operated …
A Sensor Fusion And Machine Learning Approach For Predicting Signal Power Path Loss In Wireless Communications, Yunus Egi
Theses and Dissertations
When it comes to Wireless Communication systems and their optimization in different environments, estimation of SPPL for different terrain models becomes one of the most tedious problems for Radio Frequency engineers. Since every terrain has their complex terrain structures and contains micro-variations, they end up with an ambiguous SPPL via scattering and absorption. Also, modern SPPL prediction models are error free since they use predefined estimation parameters for classified terrain model. Sometimes, terrain-related estimation errors may cause over undesirable SPPL level which is much larger than 5% tolerance error. To avoid this problem, one can benefit from 3D map of …
Unified Model Combining The Boundary Conditions Encountered At The Input, The Carrier Optical Fiber And The Output In Spatially Multiplexed Optical Communication Channels, Gregory Lewis Lovell
Unified Model Combining The Boundary Conditions Encountered At The Input, The Carrier Optical Fiber And The Output In Spatially Multiplexed Optical Communication Channels, Gregory Lewis Lovell
Theses and Dissertations
Spatial domain multiplexing allows for expansion of optical fiber data rates by utilizing the spatial dimensions within the fiber. One form of this multiplexing method utilizes oblique input angles to generate ring-like spatial modes within the optical fiber core. This radial based spatial multiplexing (rSDM) is compatible with single core fibers and conventional optical fiber systems. As rSDM has been shown to be independent of wavelength, rSDM channels allow for adaption of wavelength division multiplexing, and has been experimentally shown to be capable of improving optical fiber data rates by at least an order of magnitude. Current research into rSDM …
System Level Performance Evaluation Of 60 Ghz Downlink Under Different Beamforming And Scheduling Methods, Monera Elhashmi M Salah
System Level Performance Evaluation Of 60 Ghz Downlink Under Different Beamforming And Scheduling Methods, Monera Elhashmi M Salah
Theses and Dissertations
The research in millimeter-wave (mm-wave) area is of special interest to the upcoming fifth generation (5G) communications. The 60 GHz band is one of the most attractive 5G bands. That is due to the abundantly available spectrum, higher achievable throughput, and lower latency when compared to the conventional 4G bands. This research addresses the 60 GHz system level performance evaluation for cellular downlink transmission in an outdoor environment. Using a custom system level simulator, different parameters associated with the mm-wave communication system are predicted. These parameters include path loss (PL), signal-to-noiseplus-interference-ratio (SINR), number of antenna elements and several arrays implementations. …
Ue Based Performance Evaluation Of 4g Lte Network, Hazza Saif Saeed Alshamisi
Ue Based Performance Evaluation Of 4g Lte Network, Hazza Saif Saeed Alshamisi
Theses and Dissertations
In the past ten years, we have witnessed an increase in demand for mobile services as we have come to depend more and more on mobile phones as an indispensable part of everyday life. And not merely for making phone calls or sending text messages, but also for services such as games, mobile banking, streaming videos and making video calls. These mobile applications consume far more data than simple voice calls. Reflecting what an end user experiences when using a mobile device is an aspect that has not yet been properly catered for. The LTENetScan framework introduced a novel method …
Hybrid Long-Range Mid-Infrared Hyperbolic Phonon Polariton Waveguide Using Hexagonal Boron Nitride, Di Xiong
Hybrid Long-Range Mid-Infrared Hyperbolic Phonon Polariton Waveguide Using Hexagonal Boron Nitride, Di Xiong
Theses and Dissertations
For any photonic-on-chip applications long propagation waveguides are critical. The use of plasmon polaritons for near-infrared and optical networks has been extensively studied for the purpose of achieving long propagation lengths, however, due to plasmonic polariton effects being negligible in mid- to long-wave infrared (IR) applications, phonon polaritons are required. In recent years, extensive research has been carried out on hexagonal boron nitride (h-BN), and it has been found that h-BN has naturally occurring sub-range phonon volume-constrained hyperbolic phonon polaritons (HPhPs). The numerical results in this thesis show both the long-range and short-range phonon volume polaritons modes in h-BN. A …
Geo-Locating Ues Using Multi-Output Decision Tree Regressor, Edel Goreil Dawood
Geo-Locating Ues Using Multi-Output Decision Tree Regressor, Edel Goreil Dawood
Theses and Dissertations
Mobile communication networks constantly need to monitor and improve the quality of service and network coverage to their users, and to do so, radio measurements are required. One common method for gathering these measurements is Drive Tests (DT) in which vehicles equipped with measuring devices are sent to locations of interests. However, DT has several limitations one of which is that DT cannot be performed on indoor locations. Other approaches were later used; however, failed to prove a considerably higher efficiency. To address this need, mobile operators developed a standardized technique called Minimization of Drive Test (MDT) that take advantage …
An Efficient Low Voltage Dc Microgrid With Power Array Conversion For Commercial Buildings, Zhiqing Wu
An Efficient Low Voltage Dc Microgrid With Power Array Conversion For Commercial Buildings, Zhiqing Wu
Theses and Dissertations
PV solar energy is becoming increasingly more prevalent in electricity generation for residential and commercial buildings. Since PV solar directly supplies DC power, a DC microgrid is an ideal platform for PV energy resource in building applications. Existing DC power converters typically have low power conversion efficiency at light and heavy load conditions. Much research has been done on efficiency improvement of DC converters, but material, technology, and manufacturing processes all impose limitations on efficiency gain. This paper addresses the efficiency improvement of a DC microgrid with a power array conversion (PAC) for a commercial building application. The PAC configuration …