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Modeling Lithographic Quantum Dots And Donors For Quantum Computation And Simulation, Mitchell Ian Brickson Dec 2023

Modeling Lithographic Quantum Dots And Donors For Quantum Computation And Simulation, Mitchell Ian Brickson

Physics & Astronomy ETDs

Our first focus is on few-hole quantum dots in germanium. We use discontinous Galerkin methods to discretize and solve the equations of a highly detailed k·p model that describes these systems, enabling a better understanding of experimental magnetospectroscopy results. We confirm the expected anisotropy of single-hole g-factors and describe mechanisms by which different orbital states have different g-factors. Building on this, we show that the g-factors in Ge holes are suciently sensitive to details of the device electrostatics that magnetospectroscopy data can be used to make a prediction of the underlying confinement potential. The second focus is on designing quantum …


Early-Age Strength And Failure Characteristics Of 3d Printable Polymer Concrete: Numerical Modelling And Experimental Testing, Mohammad Amin Dehghani Najvani Dec 2023

Early-Age Strength And Failure Characteristics Of 3d Printable Polymer Concrete: Numerical Modelling And Experimental Testing, Mohammad Amin Dehghani Najvani

Civil Engineering ETDs

The time-dependent rheological and early-age strength parameters of Polymer concrete (PC) were investigated. PC flow decreased, and the static yield stress and thixotropy increased as the specimen aged, while the dynamic yield stress remained unchanged. The study found that the Herschel-Bulkley model can accurately describe the PC’s rheological behavior over time. The change in cohesion strength and internal friction angle over time was observed using uniaxial unconfined compression and direct shear tests of fresh PC. A time-dependent MohrCoulomb failure criterion was established. Temperature analysis was used to determine the gel time and explain the evolution of the time-dependent early-age strength …


Modeling Of Asphalt Concrete For Cross-Anisotropic Visco-Elasticity And Heterogeneity, Zafrul Hakim Khan Dec 2023

Modeling Of Asphalt Concrete For Cross-Anisotropic Visco-Elasticity And Heterogeneity, Zafrul Hakim Khan

Civil Engineering ETDs

Asphalt Concrete (AC) is a cross-anisotropic viscoelastic material. This study has developed a methodology to backcalculate the cross-anisotropic properties of the AC layer from the Falling Weight Deflectometer (FWD) sensor and pavement response data from embedded sensors inside a pavement section. This study has also developed a two-way coupled Multiscale Finite Element Model (MsFEM) with Phase Field Fracture (PFF) to study the microstructural heterogeneity and damage of the AC layer based on the actual field loadings. A Finite Difference Time Domain (FDTD) and Machine learning-based backcalculation algorithm were developed to determine the layer thickness and dielectric constant from air-coupled Ground …


Aleukemic Chronic Myeloid Leukemia Without Neutrophilia And Thrombocytosis: A Report From The Bcr::Abl1 Pathology Group, Daniel Rivera, Wei Cui, Juehua Gao, Deniz Peker, Qian-Yun Zhang, Rajan Dewar, Lianqun Qiu, Sergej Konoplev, Zhihong Hu, Koji Sasaki, Aileen Y. Hu, Shuyu E, Meng Liu, Hong Fang, Wei Wang, Guilin Tang, Jane F Apperley, Andreas Hochhaus, Jorge E. Cortes, Joseph D. Khoury, L Jeffrey Medeiros, Elias Jabbour, Shimin Hu Dec 2023

Aleukemic Chronic Myeloid Leukemia Without Neutrophilia And Thrombocytosis: A Report From The Bcr::Abl1 Pathology Group, Daniel Rivera, Wei Cui, Juehua Gao, Deniz Peker, Qian-Yun Zhang, Rajan Dewar, Lianqun Qiu, Sergej Konoplev, Zhihong Hu, Koji Sasaki, Aileen Y. Hu, Shuyu E, Meng Liu, Hong Fang, Wei Wang, Guilin Tang, Jane F Apperley, Andreas Hochhaus, Jorge E. Cortes, Joseph D. Khoury, L Jeffrey Medeiros, Elias Jabbour, Shimin Hu

Pathology Research and Scholarship

Chronic myeloid leukemia (CML) is characterized by leukocytosis with left-shifted neutrophilia, basophilia, eosinophilia, and variable thrombocytosis. However, extremely rare cases of patients with CML without significant leukocytosis and thrombocytosis (aleukemic phase [ALP] CML, or CML-ALP) have been reported. Due to its rarity and limited awareness, there remains a significant knowledge gap concerning the pathologic diagnosis, disease progression, and optimal patient management and outcomes. In this multi-institutional study, we investigated 31 patients with CML-ALP. Over half (54.8%) of patients had a history of or concurrent hematopoietic or nonhematopoietic malignancies. At time of diagnosis of CML-ALP, approximately 26.7% of patients exhibited neutrophilia, …


Environmental Ozone Exposure, Gestational Health, And The Lung-Placental Axis, Russell Hunter Dec 2023

Environmental Ozone Exposure, Gestational Health, And The Lung-Placental Axis, Russell Hunter

Biomedical Sciences ETDs

Adverse gestational outcomes of pregnancy are a globally occurring threat to fetomaternal health, with limited clinical prognostic and intervention strategies aside from premature labor induction. Epidemiological data shows strong correlations between gestational exposure to air pollution and the incidence of adverse gestational outcomes. The research presented here was designed to evaluate potential murine models of gestational exposure, as well as quantify maternal cardiovascular damage therein. These studies employ radiotelemetry, echocardiography, single cell RNA-sequencing, and untargeted lipidomic analyses in efforts to study these effects. Results implicate cardiovascular responses to mid-gestational ozone exposure as evidenced by decreased maternal cardiac output and increased …


The 2005 Bosnian Law On Defense; A Policy Change Case Study, Gregory D. Vuksich Dec 2023

The 2005 Bosnian Law On Defense; A Policy Change Case Study, Gregory D. Vuksich

Political Science ETDs

The Dayton Peace Accord (DPA) in 1995 ended the civil war in Bosnia and Hercegovina and established a constitution for the newly institutionalizing state. It permitted the three ethnicities – Bosniaks, Croats and Serbs – to retain their wartime armed forces in place under ethnic command, a prerogative the Serbs guarded strenuously. International organizations, however, sought a single, multiethnic military institution for the whole of the country. In 2005, however, the Serbs reversed their opposition and agreed to the international organization preference. This study explores why Bosnia’s Serbian community reversed its earlier and acceded to the creation of a single …


Interrogation Of The Molecular Mechanisms That Finetune Fcεri Signaling And Mast Cell Outcomes, Derek A. Rinaldi Dec 2023

Interrogation Of The Molecular Mechanisms That Finetune Fcεri Signaling And Mast Cell Outcomes, Derek A. Rinaldi

Biomedical Sciences ETDs

FcεRI is the ITAM receptor primarily responsible for the allergic response and immune hypersensitivity diseases such as asthma. Regulation of the strength of both FcεRI signaling, and the resulting outcomes, is accomplished via a complex array of molecular mechanisms whose interactions remain unclear. Here, I explored how the biophysical properties of antigens, crosstalk between FcεRI and integrin signaling and Arf6-mediated control of trafficking and exocytosis tune mast cell outcomes. I first found significant differences in FcεRI aggregation, phosphorylation and granule secretion after crosslinking with the multivalent antigen DNP-BSA or the small, trivalent antigen DF3. I also revealed a bi-directional, Syk-mediated …


Racialized Masculinities In Professional Basketball: Utilizing Mixedness To Challenge Commonplace Black/White Media Discourses About Nba Players, Anthony C. Peavy Dec 2023

Racialized Masculinities In Professional Basketball: Utilizing Mixedness To Challenge Commonplace Black/White Media Discourses About Nba Players, Anthony C. Peavy

Communication ETDs

In this dissertation project, I utilize a Critical Mixed Race Studies (CMRS) lens to examine how mixed-race Black/White players in the National Basketball Association (NBA) are represented, discussed, racialized, and gendered by major sports media platforms. More specifically, I utilize this project to elucidate how media centered on professional basketball continue to partake in hegemonic and essentialist rhetoric surrounding Black and White masculinity—that which has been used to discuss Black and White men in basketball throughout the entire history of the sport—to homogenize mixed-race Black/White men in the NBA and present them in a way that diminishes the potentially deconstructive …


Electrodeposition Of Giant Magnetostrictive Transducers For A Fabricated Mixed Physics Signal Transmission Device, Mina Faltas Dec 2023

Electrodeposition Of Giant Magnetostrictive Transducers For A Fabricated Mixed Physics Signal Transmission Device, Mina Faltas

Nanoscience and Microsystems ETDs

Non-intrusive solutions for communication through a sealed metal vessel requires the use of piezoelectric transducers to transmit acoustic waves through the vessel wall. This approach suffers the disadvantage of compromised security because a potential eavesdropper could decipher the correlation between digital and electric signals of both sides of the system. One solution is a mixed physics system employing magnetostrictive transducers.

For a magnetostrictive transducer to work well in this application, it would have to have a high piezomagnetic constant. This is influenced by soft magnetism and saturation magnetostriction. Nickel-Iron-Cobalt alloys are modified to retain their soft magnetic properties while increasing …


A Review On Possible Physical Meaning Of Elastic-Electromagnetic Mathematical Equivalences, Florentin Smarandache, Victor Christianto Dec 2023

A Review On Possible Physical Meaning Of Elastic-Electromagnetic Mathematical Equivalences, Florentin Smarandache, Victor Christianto

Branch Mathematics and Statistics Faculty and Staff Publications

It is known, despite special theory of relativity has been widely accepted, in our recent draft submitted to this journal it is shown that some experiments have been carried out suggesting superluminal wave propagation, which make Minkowski lightcone not valid anymore. Therefore, it seems worth to reconsider the connection between elastic wave and electromagnetic wave equations, as in their early development. In this paper we will start with Maxwell-Dirac isomorphism, then we will find its connection with elastic wave equations.


Salivary Duct Carcinoma Arising In A Warthin Tumor Of The Parotid Gland: A Rare Case Report With Review Of Literature And Pd-L1 Expression, Kaitlyn J. Nielson, Gamaliel Lorenzo, Shweta Agarwal Dec 2023

Salivary Duct Carcinoma Arising In A Warthin Tumor Of The Parotid Gland: A Rare Case Report With Review Of Literature And Pd-L1 Expression, Kaitlyn J. Nielson, Gamaliel Lorenzo, Shweta Agarwal

Pathology Research and Scholarship

Warthin's tumor is the second most common neoplasm of the parotid gland and consists of 2 components, including lymphoid stroma and glandular epithelium. Malignant transformation in this tumor is mostly seen in the lymphoid component; however, the carcinomatous transformation of the epithelial component is extremely rare. Cases of latter reported in the literature include squamous cell carcinoma, adenocarcinoma, mucoepidermoid carcinoma, oncocytic carcinoma, Merkel cell carcinoma, and undifferentiated carcinoma. We describe an extremely rare case of salivary duct carcinoma arising in a Warthin tumor in a 64-year-old male. Patient presented with an enlarging left parotid mass, biopsy of which showed salivary …


Godel, Escherian Staircase And Possibility Of Quantum Wormhole With Liquid Crystalline Phase Of Iced-Water - Part I: Theoretical Underpinning, Victor Christianto, T. Daniel Chandra, Florentin Smarandache Dec 2023

Godel, Escherian Staircase And Possibility Of Quantum Wormhole With Liquid Crystalline Phase Of Iced-Water - Part I: Theoretical Underpinning, Victor Christianto, T. Daniel Chandra, Florentin Smarandache

Branch Mathematics and Statistics Faculty and Staff Publications

As a senior physicist colleague and our friend, Robert N. Boyd, wrote in a journal (JCFA, Vol. 1,. 2, 2022), Our universe is but one page in a large book [4]. For example, things and Beings can travel between Universes, intentionally or unintentionally. In this short remark, we revisit and offer short remark to Neil’s ideas and trying to connect them with geometrization of musical chords as presented by D. Tymoczko and others, then to Escher staircase and then to Jacob’s ladder which seems to point to possibility to interpret Jacob’s vision as described in the ancient book of Genesis …


Godel, Escherian Staircase And Possibility Of Quantum Wormhole With Liquid Crystalline Phase Of Iced-Water - Part Ii: Experiment Description, Victor Christianto, T. Daniel Chandra, Florentin Smarandache Dec 2023

Godel, Escherian Staircase And Possibility Of Quantum Wormhole With Liquid Crystalline Phase Of Iced-Water - Part Ii: Experiment Description, Victor Christianto, T. Daniel Chandra, Florentin Smarandache

Branch Mathematics and Statistics Faculty and Staff Publications

The present article was partly inspired by G. Pollack’s book, and also Dadoloff, Saxena & Jensen (2010). As a senior physicist colleague and our friend, Robert N. Boyd, wrote in a journal (JCFA, Vol. 1, No. 2, 2022), for example, things and Beings can travel between Universes, intentionally or unintentionally [4]. In this short remark, we revisit and offer short remark to Neil Boyd’s ideas and trying to connect them with geometry of musical chords as presented by D. Tymoczko and others, then to Escherian staircase and then to Jacob’s ladder which seems to pointto possibility to interpret Jacob’s vision …


Extremum Seeking Control Algorithms For Extremely High Frequency Antenna System Pointing, Scott Shore Dec 2023

Extremum Seeking Control Algorithms For Extremely High Frequency Antenna System Pointing, Scott Shore

Mechanical Engineering ETDs

The research examines the application of extremum seeking control (ESC) algorithms to ground station antenna pointing for extremely high frequency (EHF) communication systems. ESC algorithms search for local maxima or minima by locating where an objective function gradient goes to zero. With wireless communication expanding into higher frequencies, the ground station pointing requirement is increasing. ESC presents a method which utilizes available equipment and information to perform ground station pointing. Additionally, ESC algorithms do not rely on assumptions or approximations needed for other techniques. The dissertation demonstrates ESC algorithm feasibility for the ground station pointing problem, benchmarks the ESC algorithms …


Post-Wildfire Export Regimes Of Solutes Along The Gallinas-Pecos River-Santa Rosa Fluvial Network, Asmita Kaphle Dec 2023

Post-Wildfire Export Regimes Of Solutes Along The Gallinas-Pecos River-Santa Rosa Fluvial Network, Asmita Kaphle

Civil Engineering ETDs

Wildfires significantly contribute to water pollution when ash and sediments, including nutrients and metals, are released into fluvial systems, impacting aquatic ecosystems and surrounding communities. This study focuses on the impacts of the Hermits Peak-Calf Canyon Fire on the Gallinas and Pecos watersheds. It employs five monitoring stations along a 190km fluvial network to assess solute export regimes post-fire, where grab samples were collected for nutrient and metal analyses for a period of more than a year. The metrics used for characterizing mobilization, chemostatic, or dilution patterns indicated mobilization for most solutes at all sites upstream of Santa Rosa Lake. …


Ai Assisted Workflows For Computational Electromagnetics And Antenna Design, Oameed Noakoasteen Nov 2023

Ai Assisted Workflows For Computational Electromagnetics And Antenna Design, Oameed Noakoasteen

Electrical and Computer Engineering ETDs

These days large volumes of data can be recorded and manipulated with relative ease. If valuable information can be extracted from them, these vast amounts of data can be a rich resource not just for the digital economy but also for scientific discovery and development of technology. When it comes to deriving valuable information from data, Machine Learning (ML) emerges as the key solution. To unlock the potential benefits of ML to science and technology, extensive research is needed to explore what algorithms are suitable and how they can be applied.

To shine light on various ways that ML can …


The Double Colonial Bind Of The Pueblo Nations During Spanish And Us Imperialism (1598-1905), Antonia Carcelén, Latin American And Iberian Institute Nov 2023

The Double Colonial Bind Of The Pueblo Nations During Spanish And Us Imperialism (1598-1905), Antonia Carcelén, Latin American And Iberian Institute

LAII Events

At the Latin American and Iberian Institute, I conduct comparative research on the double Spanish-English colonization of Pueblo nations. In this project, I explore the Pueblo comparative colonial experience as registered in the Miguel Antonio Lovato Papers (1790-1849), the New Mexico Documents Collection (1758-1876), and the Indian Affairs Collection (1684-1903). In this presentation I will present the results from the documents in the latter collection only. The manuscripts in these collections connect Indigeneity in Anglo and Spanish America bridging the gap in a single case study, though the Pueblo are hardly alone in this phenomenon of a double colonial bind, …


Exploring Non-Orientable Topology: Deriving The Poincaré Conjecture And Possibility Of Experimental Vindication With Liquid Crystal, Victor Christianto, Florentin Smarandache Nov 2023

Exploring Non-Orientable Topology: Deriving The Poincaré Conjecture And Possibility Of Experimental Vindication With Liquid Crystal, Victor Christianto, Florentin Smarandache

Branch Mathematics and Statistics Faculty and Staff Publications

This review investigates the potential of non-orientable topology as a fundamental framework for understanding the Poincaré conjecture and its implications across various scientific disciplines. Integrating insights from Dokuchaev (2020), Rapoport, Christianto, Chandra, Smarandache (under review), and other pioneering works, this article explores the theoretical foundations linking non-orientable spaces to resolving the Poincaré conjecture and its broader implications in theoretical physics, geology, cosmology, and biology.


Neutrosophic Fuzzy Magic Labeling Graph With Its Application In Academic Performance Of The Students, S. Sudha, M. Lathamaheswari, S. Broumi, F. Smarandache Nov 2023

Neutrosophic Fuzzy Magic Labeling Graph With Its Application In Academic Performance Of The Students, S. Sudha, M. Lathamaheswari, S. Broumi, F. Smarandache

Neutrosophic Sets and Systems

No abstract provided.


Neutrosophic Sets And Systems, Vol. 60, 2023, Florentin Smarandache, Mohamed Abdel-Basset, Said Broumi Nov 2023

Neutrosophic Sets And Systems, Vol. 60, 2023, Florentin Smarandache, Mohamed Abdel-Basset, Said Broumi

Neutrosophic Sets and Systems

No abstract provided.


Using Neutrosophic Trait Measures To Analyze Impostor Syndrome In College Students After Covid-19 Pandemic With Machine Learning, Riya Eliza Shaju, Meghana Dirisala, Muhammad Ali Najjar, Ilanthenral Kandasamy, Vasantha Kandasamy, F. Smarandache Nov 2023

Using Neutrosophic Trait Measures To Analyze Impostor Syndrome In College Students After Covid-19 Pandemic With Machine Learning, Riya Eliza Shaju, Meghana Dirisala, Muhammad Ali Najjar, Ilanthenral Kandasamy, Vasantha Kandasamy, F. Smarandache

Neutrosophic Sets and Systems

No abstract provided.


A Moving Target Architecture As A Side-Channel Countermeasure, Rachel M. Cazzola Nov 2023

A Moving Target Architecture As A Side-Channel Countermeasure, Rachel M. Cazzola

Electrical and Computer Engineering ETDs

We investigate a novel side-channel attack countermeasure called Side-channel Power analysis Resistance for Encryption Algorithms using Dynamic partial reconfiguration (SPREAD). The countermeasure leverages a strategy that is best characterized as a moving target architecture. Modern field-programmable gate array (FPGA) architectures provide support for dynamic partial reconfiguration (DPR), a feature that allows real-time reconfiguration of portions of the programmable logic (PL) while the FPGA continues to carry out computing tasks. Using the Advanced Encryption Standard (AES), the proposed moving target architecture leverages DPR to change the implementation characteristics of the substitution boxes (SBOX) in real time. We present experimental hardware results …


Conceptual Meaning In Phonology: Multimodal Iconic Expressions In Discourse Focus, David Páez Acevedo Nov 2023

Conceptual Meaning In Phonology: Multimodal Iconic Expressions In Discourse Focus, David Páez Acevedo

Linguistics ETDs

In everyday communication, speakers go beyond words to synchronize speech sounds and gestures, adding nuanced meanings. For instance, in Colombian Spanish, recounting the distant past involves elongating words, modulating pitch, and using expressive hand movements. This dissertation explores this phenomenon, termed Multimodal Iconic Expressions (MMIEs), using Cognitive Linguistics and Cognitive Grammar. The quantitative study uncovers correlations between verb aspect, nominal quantification, and speech duration, revealing phono-iconic connections. The qualitative study examines construal operations giving rise to MMIEs across semantic domains. MMIEs predominantly appear in discourse Focus, with durative events and mass-like quantities exhibiting pronounced phono-iconic associations. Patterns include stress and …


Study Of Si-Gan Photoconductive Switches Operating Modes Using Near-Ir Radiation, Nicolas Eduardo Gonzalez Padilla Nov 2023

Study Of Si-Gan Photoconductive Switches Operating Modes Using Near-Ir Radiation, Nicolas Eduardo Gonzalez Padilla

Electrical and Computer Engineering ETDs

One of the most promising solid-state devices for fast switching and radio frequency generation applications is the photoconductive switch (PCSS). These devices have been thoroughly explored since the late 1980s and exhibit remarkable switching properties in gallium arsenide (GaAs). With recent advances in wide bandgap (WBG) semiconductor manufacturing processes, there has been an increasing interest in using WBG semiconductors to implement PCSS. WBG semiconductors could exhibit the same switching characteristics as GaAs while overcoming their poor power management and short lifetime under pulsed power conditions, making PCSS a reliable option in high-power applications. Gallium Nitride (GaN) has emerged as one …


Phenological Activities Of Desert Bees Track Rainfall More Than Temperature And Predict Temporal Abundance Trends Over 16 Years, Jade Elijah Mclaughlin Nov 2023

Phenological Activities Of Desert Bees Track Rainfall More Than Temperature And Predict Temporal Abundance Trends Over 16 Years, Jade Elijah Mclaughlin

Biology ETDs

Phenology, the timing of recurrent biological events, is a key mechanism by which species adapt or acclimatize to variable environmental conditions, including those influenced by climate change. Measurable traits, including the onset and end of activity, peak activity, and duration, characterize the phenology of life events, and could be significant predictors of trends in population abundance or stability in a changing climate. Bees provide critical pollination services, and understanding the covariates of bee phenological traits can refine predictions on the vulnerabilities of bees and their services to climate change. We paired 16 years of monthly bee survey data (2002-2019) with …


Quantifying Co2 And Heat Fluxes At Roosevelt Hot Springs, Hydrothermal Area, Samantha R. Wolf Nov 2023

Quantifying Co2 And Heat Fluxes At Roosevelt Hot Springs, Hydrothermal Area, Samantha R. Wolf

Earth and Planetary Sciences ETDs

Roosevelt Hot Springs is an actively producing hydrothermal system that has been extensively studied by field, geophysical and geochemical techniques since the 1970’s. Roosevelt Hot Springs sits at the western base of the Mineral Mountains in Utah, an area that has formed because of many volcanic, thermal and structural events since the late Oligocene. The work in this manuscript is the first of its kind to incorporate measurements of spring-based CO2 fluxes with diffuse measurements to quantify the total CO2 Flux in tons per day of a Basin and Range and Colorado Plateau Transition Zone-hosted hydrothermal system. Using …


Application Of An Empirical Density Law Via Python For Aqueous Plutonium Chloride Systems For Mcnp6, Riley Bulso Nov 2023

Application Of An Empirical Density Law Via Python For Aqueous Plutonium Chloride Systems For Mcnp6, Riley Bulso

Nuclear Engineering ETDs

A predictive density law has been implemented and developed into a Python tool to reduce bias and the high degree of conservatism in criticality safety calculations for aqueous plutonium chloride systems. Based upon available data and parameters, an empirical method was used to create this law. This method was used in the development of a Python tool to predict the density and composition of such a solution, which may then populate material data in an MCNP6 input file.

This tool and the density law equation have been verified against experimental data points for accuracy. Density is predicted with a maximum …


An Exploration Of Tissue Specific Impedance Using Microneedle Based Wearable Sensors, Kaitlyn J.H. Read Nov 2023

An Exploration Of Tissue Specific Impedance Using Microneedle Based Wearable Sensors, Kaitlyn J.H. Read

Nanoscience and Microsystems ETDs

Within this research, I have developed a microneedle-based wearable sensor for plants and fungi, to measure the electrical impedance of different tissues. Electrical impedance measures the physical properties of a material while allowing complex biological systems to be modeled onto a simplified electrical circuit. Microneedles allow for electrical impedance to measure specific tissues without the insulative properties of the cuticle and can be applied to delicate tissues. I have demonstrated the tissue specificity, novel attachment methods, as well as use on both plants and fungi. In chapter 1, I applied microneedle-based impedance to the leaf midrib of a sorghum and …


Carrier Dynamics In Green Iii-Nitride Leds Using Small-Signal Electroluminescence, Xuefeng Li Nov 2023

Carrier Dynamics In Green Iii-Nitride Leds Using Small-Signal Electroluminescence, Xuefeng Li

Optical Science and Engineering ETDs

Solid-state lighting has achieved significant success over the past two decades, but the low quantum efficiency of green LEDs (i.e., the “green gap”) remains a barrier to full red-green-blue (RGB) displays in numerous applications. Combating efficiency reduction in longer-wavelength LEDs requires understanding the relative roles of intrinsic effects (e.g., wave-function overlap, carrier-current density relationship, phase-space filling (PSF)) vs. extrinsic effects (e.g., material degradation due to increased defect density, compositional inhomogeneities, etc.). A systematic study of the carrier dynamics in InGaN/GaN LEDs is very important for understanding the origin of the green gap and for providing solutions to improve the efficiency …


Domain Specific Feature Representation Learning For Diverse Temporal Data, Farhan Asif Chowdhury Nov 2023

Domain Specific Feature Representation Learning For Diverse Temporal Data, Farhan Asif Chowdhury

Computer Science ETDs

Humans can leverage domain context to recognize novel patterns and categories based on limited known examples. In contrast, computational learning methods are not adept at exploiting context and require sufficient labeled examples to achieve similar accuracy. Many temporal data domain, for example, seismic signals and oil mining sensor data, requires domain expert annotation, which is both costly and time-consuming. The dependency on training data limits the applicability of machine learning algorithms for domains with limited labeled data. This dissertation aims to address this gap by developing temporal mining algorithms that exploit domain context to learn discriminative feature representation from limited …