Electrical and Computer Engineering Commons^™

Establishing The Foundation To Robotize Complex Welding Processes Through Learning From Human Welders Based On Deep Learning Techniques, Rui Yu

Theses and Dissertations--Electrical and Computer Engineering

As the demand for customized, efficient, and high-quality production increases, traditional manufacturing processes are transforming into smart manufacturing with the aid of advancements in information technology, such as cyber-physical systems (CPS), the Internet of Things (IoT), big data, and artificial intelligence (AI). The key requirement for integration with these advanced information technologies is to digitize manufacturing processes to enable analysis, control, and interaction with other digitized components. The integration of deep learning algorithm and massive industrial data will be critical components in realizing this process, leading to enhanced manufacturing in the Future of Work at the Human-Technology Frontier (FW-HTF).

This …

Application Of Conventional Feedforward And Deep Neural Networks To Power Distribution System State Estimation And State Forecasting, James Paul Carmichael

Theses and Dissertations--Electrical and Computer Engineering

Classical neural networks such as feedforward multilayer perceptron models (MLPs) are well established as universal approximators and as such, show promise in applications such as static state estimation in power transmission systems. This research investigates the application of conventional neural networks (MLPs) and deep learning based models such as convolutional neural networks (CNNs) and long short-term memory networks (LSTMs) to mitigate challenges in power distribution system state estimation and forecasting based upon conventional analytic methods. The ability of MLPs to perform regression to perform power system state estimation will be investigated. MLPs are considered based upon their promise to learn …

Modeling The Early Visual System, Nicholas Lanning

Theses and Dissertations--Electrical and Computer Engineering

There are two encoding schema present in simple cells in the early visual system of vertebrates: the retinal simple cells activate highly when the receptive field contains a center surround stimulus, while the primary visual cortex’s (V1) simple cells activate highly when the receptive field contains visual edges. Work has been done in the past to enforce constraints on visual machine learning such that the retinal or V1 encoding is learned, but this work is often done to emulate retinal and V1 encoding in a vacuum. Recent work using convolutional neural networks focuses on anatomical constraints along with a supervised …

Investigating The Effects Of Network Dynamics On Quality Of Delivery Prediction And Monitoring For Video Delivery Networks, Obinna C. Izima

Doctoral

Video streaming over the Internet requires an optimized delivery system given the advances in network architecture, for example, Software Defined Networks. Machine Learning (ML) models have been deployed in an attempt to predict the quality of the video streams. Some of these efforts have considered the prediction of Quality of Delivery (QoD) metrics of the video stream in an effort to measure the quality of the video stream from the network perspective. In most cases, these models have either treated the ML algorithms as black-boxes or failed to capture the network dynamics of the associated video streams.

This PhD investigates …

Comprehensive Fault Diagnostics And Performance Forecasting Of Wind Turbines Through Condition Monitoring Solutions, Shuo Zhang

Doctoral

The operation and maintenance (O&M) issues of wind turbines (WTs) are challenging because unplanned maintenance, caused by sudden component failures, can bring about durable downtimes and significant revenue losses. It is important to carry out effective fault diagnostics and prognostics schemes under the rapid development of wind power generation. Hence, Condition Monitoring (CM) solutions focus on measurements and detections of high-risk WT components, which could result in high failure rates and long downtimes. Machine Learning (ML) models have been commonly applied in CM to allocate imminent indications of failure or degradation for curtailing the O&M costs of WTs. By way …

Efficient Design And Implementation Of Miniaturized Microstrip Diplexer Using Dual Open Stub Loaded Resonator For 5g Applications, Islam F. Abu Elkhair, Hamdi A. Elmikati, Mohamed M. Ashour, Amr H. Hussein

Mansoura Engineering Journal

The design and implementation of a compact size diplexer with high isolation, low insertion loss, and small fractional bandwidths is a promising issue in recent wireless communication systems. In this paper, a novel microstrip diplexer has been introduced based on the utilization of the dual open stub loaded resonator technique. The proposed design has a very compact size of with a high operating power efficiency. The diplexer is designed to operate at two resonance frequencies of and with very low insertion losses of and , respectively. Moreover, it provides high isolation values of and for and , respectively. The diplexer …

การเปรียบเทียบปริมาณการปล่อยก๊าซคาร์บอนไดออกไซด์ระหว่างยานยนต์สันดาปกับยานยนต์ไฟฟ้าแบตเตอรี่ในประเทศไทยด้วยแบบจำลองปัจจัยการผลิตและผลผลิต, ชณาภัทร์ สว่างศรี

Chulalongkorn University Theses and Dissertations (Chula ETD)

โครงสร้างการผลิตไฟฟ้าของประเทศไทยซึ่งเป็นเชื้อเพลิงของยานยนต์ไฟฟ้ามีสัดส่วนการพึ่งพาพลังงานจากเชื้อเพลิงฟอสซิลมากถึงร้อยละ 74.88 ของกำลังการผลิตในปี 2562 จึงเกิดคำถามวิจัยว่า การเปลี่ยนผ่านจากยานยนต์สันดาปสู่ยานยนต์ไฟฟ้าตามมาตรการการส่งเสริมยานยนต์ไฟฟ้าเพื่อลดการปล่อยก๊าซคาร์บอนไดออกไซด์ในภาคขนส่ง เป็นเพียงการย้ายการปล่อยก๊าซคาร์บอนไดออกไซด์จากภาคขนส่งสู่ภาคพลังงานเท่านั้นหรือไม่ การศึกษานี้มีวัตถุประสงค์เพื่อเปรียบเทียบการปล่อยก๊าซคาร์บอนไดออกไซด์ที่เกิดขึ้นจากการผลิตและการใช้งานยานยนต์ระหว่างยานยนต์สันดาปและยานยนต์ไฟฟ้าแบตเตอรี่ในประเทศไทย ซึ่งไม่รวมส่วนของการบำรุงรักษา และการกำจัดซาก โดยใช้แบบจำลองปัจจัยการผลิตและผลผลิตวิเคราะห์การเปลี่ยนแปลงที่เกิดขึ้นจากความต้องการยานยนต์และเชื้อเพลิง และหาปริมาณปล่อยก๊าซคาร์บอนไดออกไซด์จากการเปลี่ยนแปลงดังกล่าวผ่านค่าสัมประสิทธิ์การปล่อยก๊าซคาร์บอนไดออกไซด์ต่อหน่วยของมูลค่าผลผลิต ผลการศึกษาพบว่ากระบวนการผลิตยานยนต์สันดาปก่อให้เกิดการปล่อยก๊าซคาร์บอนไดออกไซด์ 12.45 ตันต่อรถยนต์ 1 คัน ในขณะที่กระบวนการผลิตยานยนต์ไฟฟ้าแบตเตอรี่ก่อให้เกิดการปล่อยก๊าซคาร์บอนไดออกไซด์ 14.85 ตันต่อรถยนต์ 1 คัน เมื่อพิจารณาการปล่อยก๊าซคาร์บอนไดออกไซด์จากการใช้งานยานยนต์เป็นระยะเวลา 5 ปี พบว่าการผลิตเชื้อเพลิงน้ำมันมีปริมาณการปล่อยก๊าซคาร์บอนไดออกไซด์ 1.86 ตัน และมีปริมาณการปล่อยก๊าซคาร์บอนไดออกไซด์จากการขับเคลื่อนยานยนต์สันดาป 21.80 ตัน ในขณะที่ปริมาณก๊าซคาร์บอนไดออกไซด์จากการผลิตเชื้อเพลิงกระแสไฟฟ้าเพื่ออัดประจุยานยนต์มีค่า 7.08 ตัน ทำให้โดยรวมการผลิตและใช้งานยานยนต์สันดาปมีปริมาณการปล่อยก๊าซคาร์บอนไดออกไซด์ 36.11 ตัน และการผลิตและใช้งานยานยนต์ไฟฟ้าแบตเตอรี่มีปริมาณการปล่อยก๊าซคาร์บอนไดออกไซด์ 21.93 ตัน ทั้งนี้ยังไม่นับรวมปริมาณการปล่อยก๊าซคาร์บอนไดออกไซด์จากการเปลี่ยนแบตเตอรี่ของยานยนต์ไฟฟ้าแบตเตอรี่ซึ่งมีรอบระยะการเปลี่ยนที่ 5–8 ปี การเปลี่ยนจากยานยนต์สันดาปมาใช้งานยานยนต์ไฟฟ้าแบตเตอรี่ในระยะเวลา 5 ปี จะปล่อยก๊าซคาร์บอนไดออกไซด์ลดลงร้อยละ 39.26 โดยภาคขนส่งจะมีการปล่อยก๊าซคาร์บอนไดออกไซด์ลดลง แต่ในภาคการผลิตไฟฟ้าจะมีการปล่อยก๊าซคาร์บอนไดออกไซด์เพิ่มสูงขึ้น นอกจากนี้การศึกษายังพบว่าการปรับเปลี่ยนเทคโนโลยีของสาขาการผลิตไฟฟ้าเป็นปัจจัยสำคัญในการลดการปล่อยก๊าซคาร์บอนไดออกไซด์โดยรวมของประเทศ

Development And Analysis Of A Game Play In Chulalongkorn University Central Library Metaverse, Aisha Munir

Chulalongkorn University Theses and Dissertations (Chula ETD)

Metaverse is the next generation of the internet that allows people to interact with digital content in a more immersive and interactive way. This paradigm shift extends to the realm of education, where the concept of a smart campus is reshaping traditional educational systems. This research focuses on the integration of the metaverse in education, with a specific emphasis on smart libraries. Recognizing libraries as integral components of educational systems, this study proposes a metaverse platform for Chulalongkorn University's central library. The proposed platform enables users to explore the virtual library remotely and simulate resource classification and physical service in …

Response To National Battery Strategy: Issues Paper, Asma Aziz, Ingrid Hopley

Other Reports

This report shares authors view on National Battery Strategy: issues paper. Observations shared in this report primarily address Theme 4: Creating the enabling environment for industry growth, whilst also providing some contributions to Question 1: Moving up the value chain.

การพัฒนาพิพิธภัณฑ์จุฬาลงกรณ์มหาวิทยาลัยเสมือน สำหรับการเยี่ยมชมพร้อมกันหลายราย, ญาดา อังสนานนท์

Chulalongkorn University Theses and Dissertations (Chula ETD)

วิทยานิพนธ์ฉบับนี้ได้สร้างพิพิธภัณฑ์จุฬาลงกรณ์มหาวิทยาลัยในโลกเสมือนจริงสำหรับการใช้งานบนอุปกรณ์คอมพิวเตอร์ ครอบคลุมตัวอาคารทั้งหลัง และสร้างนิทรรศการในโลกเสมือนที่จัดแสดงเรื่องราวที่เกี่ยวข้องกับประวัติศาสตร์ของจุฬาลงกรณ์มหาวิทยาลัยให้ใกล้เคียงกับนิทรรศการจริงที่จัดแสดงอยู่บนชั้น 4 ของอาคาร ในระบบที่สร้างขึ้นนี้สามารถรองรับผู้ใช้งานได้พร้อมกันได้หลายราย โดยผู้ใช้แต่ละรายสามารถสร้างสรรค์ตัวละครใหม่ ๆ ที่หลากหลายเพื่อแสดงความเป็นตัวตนบนโลกเสมือนได้อย่างอิสระและมีเอกลักษณ์ที่เป็นของตนเอง ผู้เข้าเยี่ยมชมสามารถปรับเปลี่ยนมุมมองของกล้องให้มีระยะใกล้ไกลได้ช่วยให้อ่านเนื้อหาและข้อความต่าง ๆ ได้ และสามารถเคลื่อนไหวได้อย่างอิสระ ไม่ว่าจะเป็นการเดิน วิ่ง กระโดด หรือแม้กระทั่งการเทเลพอร์ตไปยังจุดต่าง ๆ ภายในมีการนำเสนอความรู้ทางประวัติศาสตร์ในรูปแบบของ เสียงบรรยาย รูปภาพ วีดิทัศน์ และข้อความ ทำให้ผู้เยี่ยมชมสามารถเรียนรู้ประวัติศาสตร์และเหตุการณ์สำคัญของจุฬาลงกรณ์มหาวิทยาลัยร่วมกันกับผู้อื่นได้ตลอดทุกช่วงเวลาโดยไม่จำเป็นต้องอยู่ในสถานที่เดียวกัน ผลการทดลองในเบื้องต้นกับผู้ใช้งานที่ไม่คุ้นเคยกับเทคโนโลยีโลกเสมือนพบว่าผู้ใช้งานรู้สึกตื่นเต้นและพึงพอใจกับประสบการณ์ใหม่ที่ได้รับจากการท่องไปในโลกพิพิธภัณฑ์เสมือนแห่งนี้ ที่ได้รับการพัฒนาให้มีความสมจริงและเข้าถึงได้ง่าย จึงนับเป็นจุดเริ่มต้นของการนำเทคโนโลยีโลกเสมือนมาประยุกต์ใช้ให้เกิดเป็นมิติใหม่ของการเผยแพร่เรื่องราวทางประวัติศาสตร์ของจุฬาลงกรณ์มหาวิทยาลัยได้อย่างกว้างขวาง

Pattern And Polarization Diversity Multisector Annular Antenna For Iot Applications, Abel Zandamela, Nicola Marchetti, Max Ammann, Adam Narbudowicz

Articles

This work proposes a small pattern and polarization diversity multisector annular antenna with electrical size and profile of ka = 1.2 and 0.018λ, respectively. The antenna is planar and comprises annular sectors that are fed using different ports to enable digital beamforming techniques, with efficiency and gain of up to 78% and 4.62 dBi, respectively. The cavity model analysis is used to describe the design concept and the antenna diversity. The proposed method can produce different polarization states (e.g., linearly and circularly polarized patterns) and pattern diversity characteristics covering the elevation plane. Owing to its small electrical size, low-profile and …

Optical Design Study Of A High-Resolution Spectrograph Utilizing Photonic Lanterns For A Large Fiber Array Telescope, Richard D'Alo

Graduate Thesis and Dissertation 2023-2024

Large area fiber array telescopes are a relatively modern development in the long history of telescope design and effectively create a single large equivalent aperture by combining many smaller unit telescopes at a fraction of the cost. In this study a spectrograph optical design is demonstrated that utilizes photonic lanterns in the input fiber feed for the Large Fiber Array Spectroscopic Telescope (LFAST) design concept, where photonic lanterns provide a simplified approach to the fiber feed originally proposed for LFAST. Conservation of etendue is applied to derive the relationship between slit size and photonic lantern ratio, and classical echelle spectrograph …

Enhancing Traffic Safety In Unpredicted Environments With Integration Of Adas Features With Sensor Fusion In Intelligent Electric Vehicle Platform With Implementation Of Environmental Mapping Technology, David S. Obando Ortegon

College of Graduate Studies: Theses & Dissertations

A major objective on society is to reduce the number of accidents and fatalities on the road for drivers, and pedestrians. Therefore, the automotive engineering field is working on this problem through the development and integration of safety technologies such as advanced driving assistance systems. For this reason, this work was intended to develop and evaluate the performance of different ADAS features and IV technologies under unexpected scenarios. This by the development of safety algorithms applied to the intelligent electric vehicle designed and built in this work, through the use of ADAS sensors based on sensor fusion. Evaluation of AEB, …

Biocybersecurity And Deterrence: Hypothetical Rwandan Considerations, Issah Samori, Gbadebo Odularu, Lucas Potter, Xavier-Lewis Palmer

Community & Environmental Health Faculty Publications

Digitalization and sustainability are popular words within modern disciplines as practitioners each look toward the future of their respective fields. Specifically for the African continent, which is making great strides in developmental targets, those two terms are central to core aspects of policy initiatives that may foster cooperation across its varied lands and nations. One of the underlying challenges that confront Africa is a lack of strong regional integration across socioeconomic and political programs; there is value in African regions having more regional connectedness. We assess the rate of regional integration and development in Africa and discuss how to alleviate …

Constructing Series, Parallel And Mixed Circuits With Lightbulbs And Analyzing Their Behaviors, Adaeze A. Eze

A with Honors Projects

This honors project was an experiment "to find out if the principles of a series, parallel and a mixed circuit still apply under the given condition (varying bulb resistance)."

Evaluating The Impact Of Increased Cycling On Thermal Power Plants Due To Wind Energy Penetration In The Midwest: A Case Study, Joscelyne Larson

Electronic Theses and Dissertations

One of the most significant shifts in the mix of U.S. electricity generation over the past few years has been the rapid expansion of renewable energy resources, especially solar and wind. However, fossil fuels are still necessary to fulfill the world’s energy requirements. Despite efforts to increase the use of renewable energy sources, these sources can be at times unreliable, causing countries around the world to continue to rely on base load units such as coal and natural gas. This decrease in fossil fuels and increase in renewable energy sources presents many complex issues in terms of power system planning, …

Towards The Development Of A Balanced Legislative Framework For Consumer Data Protection In Electronic Commerce: The Case Of The Sultanate Of Oman, Talib Al Kharusi

Doctoral

This research aims to investigate whether the law as it currently stands in Oman provides adequate legal protection for personal data, to determine the current obstacles facing the electronic commerce sector, and to identify ways of overcoming such challenges. The empirical focus of this study will be electronic commerce transactions between companies and consumers. In this regard, the research will explore the perceptions of the main stakeholders towards privacy regulation and what implications these have for the growth of electronic commerce in Oman. The privacy that this research aims to explore is a complex issue since it concerns human feelings …

Optimizing Battery Performance: Investigating The Long-Term Impacts Of Bidirectional Battery Management Systems On Battery Cells, Drue Nathaniel Haskins

Graduate Research Theses & Dissertations

With the increased use of batteries in everyday life, it is crucial to have a robust and reliable battery system that can continue to power our devices. This paper will investigate the reliability, impact on the batteries, and functionality of the bidirectional battery management system (BMS). The design uses two bidirectional switches for each cell, one in series with the cell and one in parallel with the other bidirectional switch and cell. This will allow the cell to be taken in and out of the circuit for any reason determined by the BMS. Taking the battery in and out of …

Community And Key Player Detection For Disrupting Illicit Drug Supply Networks In Social Media Platforms – Especially On Instagram, Akassi Rachel Niamke Aman

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis focuses on the pressing issue of illicit drug trafficking and its impact on public health and safety at a global level. With the advent of digital technologies and social media platforms, combating drug trafficking has become increasingly challenging for law enforcement and researchers alike. Among these platforms, Instagram, a popular photo and video-sharing social networking platform, has emerged as a prominent hub for drug trafficking activities.

In this study, we delve into the effectiveness of community and key player detection algorithms in identifying and disrupting illicit drug supply networks on Instagram. To conduct our research, we collected real …

Imitation Learning For Swarm Control Using Variational Inference, Hafeez Olafisayo Jimoh

Graduate Theses, Dissertations, and Problem Reports (ETD)

Swarms are groups of robots that can coordinate, cooperate, and communicate to achieve tasks that may be impossible for a single robot. These systems exhibit complex dynamical behavior, similar to those observed in physics, neuroscience, finance, biology, social and communication networks, etc. For instance, in Biology, schools of fish, swarm of bacteria, colony of termites exhibit flocking behavior to achieve simple and complex tasks. Modeling the dynamics of flocking in animals is challenging as we usually do not have full knowledge of the dynamics of the system and how individual agent interact. The environment of swarms is also very noisy …

Optimal Deployment Of Air Vehicle As Communication Relay For Multiple Ground Vehicles, Juan David Pabon Arias

Graduate Theses, Dissertations, and Problem Reports (ETD)

Heterogeneous teams of both air and ground mobile vehicles can combine the advantages of mobility, sensing capability, and operation time when performing complex tasks. However, when ground vehicles operate in cluttered environments with randomized obstacles, they may experience line of sight (LoS) obstructions and loss of communication due to those obstacles. To mitigate this issue, an airborne relay can be positioned in the vicinity of the ground vehicles to aid communication by establishing two-hop communication links between the vehicles.

This thesis develops an analytical framework to calculate the probability of spanning a two-hop communication between a pair of ground vehicles …

Object Detection And Classification In The Visible And Infrared Spectrums, Domenick D. Poster

Graduate Theses, Dissertations, and Problem Reports (ETD)

The over-arching theme of this dissertation is the development of automated detection and/or classification systems for challenging infrared scenarios. The six works presented herein can be categorized into four problem scenarios. In the first scenario, long-distance detection and classification of vehicles in thermal imagery, a custom convolutional network architecture is proposed for small thermal target detection. For the second scenario, thermal face landmark detection and thermal cross-spectral face verification, a publicly-available visible and thermal face dataset is introduced, along with benchmark results for several landmark detection and face verification algorithms. Furthermore, a novel visible-to-thermal transfer learning algorithm for face landmark …

An Investigation Of 3.5 Μm Emission In Er3+-Doped Fluorozirconate Glasses Under 638 Nm Laser Excitation, Haiyan Zhao, Ke Tian, Xin Wang, Dejun Liu, Shunbin Wang, Gerald Farrell, Pengfei Wang

Articles

Intense 3.5 μm mid-infrared emission has been achieved in Er3+-doped ZBYA glasses, which is ascribed to the Er3+: 4F9/2→4I9/2 transition. Based on the absorption spectrum of Er3+ ions, a 638 nm laser was utilized to directly pump the upper level (Er3+: 4F9/2) to achieve 3.5 μm emission with enhanced quantum efficiency. Spectroscopic parameters were predicted by Judd-Ofelt theory. The maximum emission cross-section of the Er3+-doped ZBYA glass was estimated to be 5.5×10-22 cm2 at 3496 nm. Additionally, the fluorescence spectra and energy level lifetimes of ZBYA glass samples with different Er3+ ions doping concentrations were also measured. The theoretical and …

Surface Properties, Work Function, And Thermionic Electron Emission Characterization Of Materials For Next-Generation Dispenser Cathodes, Antonio Mantica

Theses and Dissertations--Chemical and Materials Engineering

A dispenser cathode’s ability to thermionically emit electrons is highly dependent on its material properties, especially those of the surface. Understanding the relationship between surface properties and electron emission, therefore, is vital to reach the next generation of the many vacuum electron devices (VEDs) that rely on the physics of electron emission. In the past century, many techniques have been developed to characterize material surfaces and quantify thermionic emission. These techniques are based on a wide range of different physical phenomena, including measuring photoemission via the photoelectric effect, measuring the electrostatic potential between metals in electrical contact, and current collection …

Solid-State Electrolytes For Long Duration Molten Sodium Batteries, Ryan C. Hill

Theses and Dissertations--Chemical and Materials Engineering

Rechargeable batteries have become a staple of modern society, driving the development and expansion of portable electronics and electric vehicles. The long lifetime and high energy density provided by batteries have made them excellent candidates for use in the emerging field of long duration, grid-scale energy storage. However, traditional battery chemistries, such as Li-ion, are not an ideal solution for grid-scale storage, due to high-cost raw materials that are often sourced from volatile markets. Sodium-based batteries are a promising alternative for long duration storage, owing to the domestic abundance of raw materials and energy densities that nearly rival that of …

Wavelet-Based Real-Time Harmonic Phasor Estimation In Complex Signals With Inter-Harmonics And Transient Events, M A Aziz Jahan

Dissertations, Master's Theses and Master's Reports

Addressing the evolving challenges in modern power systems induced by the integration of Inverter Based Resources (IBRs), such as solar inverters, wind turbine converters, electric vehicle charging stations etc is the main goal of this research. The study focuses on the critical task of harmonic phasor estimation in the presence of sub-harmonics, inter-harmonics, time-varying harmonics, DC offset, transient events, and other power quality disturbances. A novel wavelet-based harmonic phasor estimation method is proposed to enhance accuracy, particularly during transient events, ensuring a nuanced understanding of phase angle variations. The research emphasizes the versatility of wavelet analysis for both steady-state and …

Development And Verification Of Automated Fixtures For Functional Testing Of Space Grade Printed Circuit Board Assemblies, Nicholas A. Wylie

Dissertations, Master's Theses and Master's Reports

Orbion Space Technology is a developer and manufacturer of electric propulsion systems for military and commercial spacecraft. Orbion’s products include a Power Processing Unit (PPU) which is utilized for power and control of the satellite propulsion system. These PPUs are complex electro-mechanical assemblies that include multiple Printed Circuit Board Assemblies (PCBA) and are built to IPC standards. To ensure smooth fabrication and to reduce the risk of complications from in-process rework of PCBAs, comprehensive electrical functional testing at the board-level is required before higher- level assembly. Electrical functional testing provides verification of quality, workmanship, and manufacturing defects of the PCBAs. …

Experimental Evaluation Of Micro-Epidermal Actuators On Flexible Substrates, Courtney D. Bradley

Graduate Research Theses & Dissertations

Does embedding actuators in a flexible substrate increase their performance in hearing aids? What are the differences in damping experienced by actuators of different diameters and at different locations? At what frequency is peak acceleration achieved and what role does the size of the actuator and embedding it in a flexible substrate play? These questions will form the basis of this thesis. This work was done to develop a small non-invasive Band-Aid-©-like hearing aid. The novelty of this device requires a detailed analysis of piezoelectric actuators. This is a continuation of past students’ work on the topic. The main parameters …

Coulomb Blockade-Mediated Field Emission Sources Using Ultra-Nanocrystalline Diamond, Jevin Jensen

Graduate Research Theses & Dissertations

Coulomb Blockade effects in field emission provide interesting means of achieving brighter electron sources for numerous applications, ranging from vacuum electronics to the next generation of electron beam technology. Microelectronics cleanroom methods are presented in this thesis for production of field emission sources moderated by the Coulomb Blockade. The use of common processes is an essential step toward widespread experimentation with Coulomb Blockade-mediated field emission apparatuses. The main feature to be explored is the use of nano-diamond films for their potential applicability for this desired outcome. Ultra-Nanocrystalline Diamond is used in two different ways to achieve this, both as a …

Prioritized Object Detection Integrating Fuzzy Logic Risk Assessment And Planned Path., Khatereh Mohammadi

Graduate Research Theses & Dissertations

Nowadays, Autonomous Vehicles are in the spotlight as a response to the challenges stemming from population growth, worsening traffic congestion, and rising road accidents. Researchers and companies are concentrating on developing Automated Driving Systems (ADS) to tackle these issues.Of the various components that constitute an autonomous vehicle, perception plays a pivotal role, akin to the function of human eyes and the human brain. Therefore, ensuring precise and reliable perception within Autonomous Vehicles is paramount. This thesis is inspired by the principles of human perception, particularly on the road, and endeavors to replicate this process. Just as a human driver does …