Digital Commons Network^™

Active Photonic Integrated Devices And Circuits On Thin-Film Lithium Niobate Platform, Ehsan Ordouie

Electronic Theses and Dissertations, 2020-2023

This thesis delves into innovative active photonic integrated devices and circuits on the thin-film lithium niobate (TFLN) platform, focusing on their applications and potential future advancements. We introduce a new family of electrooptic modulators (EOMs), the Four-Phase Electrooptic Modulators (FEOMs), which are fabricated using the TFLN platform. These devices effectively mitigate bandwidth and dynamic-range constraints in optical communication systems by reducing dispersion penalties and common-mode noises. Their functionality is demonstrated in a photonic time-stretch system. A dual-polarization variant further exemplifies the mitigation of both dispersion penalties and common-mode noises in long-haul communication links, marking significant strides towards the practical implementation …

Clustering Of Diverse Multiplex Networks, Yaxuan Wang

Electronic Theses and Dissertations, 2020-2023

This dissertation introduces the DIverse MultiPLEx Generalized Dot Product Graph (DIMPLE-GDPG) network model where all layers of the network have the same collection of nodes and follow the Generalized Dot Product Graph (GDPG) model. In addition, all layers can be partitioned into groups such that the layers in the same group are embedded in the same ambient subspace but otherwise all matrices of connection probabilities can be different. In common particular cases, where layers of the network follow the Stochastic Block Model (SBM) and Degree Corrected Block Model (DCBM), this setting implies that the groups of layers have common community …

Inventions In The Area Of Nanotechnologies And Nanomaterials. Part I, Leonid A. Ivanov, Li Da Xu, Zhanna V. Pisarenko, Svetlana R. Muminova, Nadezda G. Miloradova

Information Technology & Decision Sciences Faculty Publications

Introduction. Advanced technologies inspire people by demonstrating the latest achievements (materials, methods, systems, technologies, devices etc.) that dramatically change the world. This, first of all, concerns nanotechnological inventions designed by scientists, engineers and specialists from different countries. Main part. The article provides an abstract overview of inventions of scientists, engineers and specialists from different countries: Germany, Russia, China, USA et al. The results of the creative activity of scientists, engineers and specialists, including inventions in the field of nanotechnology and nanomaterials allow, when introduced to industry, achieving a significant effect in construction, housing and communal services, and related sectors of …

Using Homology Modeling And Computational Protein-Peptide Design To Identify Potential Inhibitors Of Cish Binding To Plc-Gamma 1 In The T-Cell Activation Pathway Of Blood Cancers, Evelyn Paquette

Chemistry Master’s Theses

The CISH gene product (protein) SH2 domain binds to PLC Gamma l and inhibits the normal function of the T-cell signaling pathway and immune response. This is a pressing concern in tumorous blood cancers as the body's immune system cannot fight against a growing cancer. Dr. Steven Ansell from The Mayo Clinic hypothesized that there must be a way to create a molecule that will bind more readily to the CISH SH2 domain, mitigating the inhibitory impact of CISH on T-cell .

Homology modeling and computational peptide design were used to investigate the Ansell hypothesis. Fir t, homology models of …

Bs Data Science & Data Analytics, Ds 2023-24, Arkansas State University - Jonesboro

Bachelor of Science and Education

Data Science Emphasis

Bsce, Civil Engineering 2023-24, Arkansas State University - Jonesboro

Bachelor of Science and Education

No abstract provided.

“Any Means Necessary To Refuse Erasure By Algorithm:” Lillian-Yvonne Bertram’S Travesty Generator, Zach Whalen

Communication & Digital Studies Articles

Lillian-Yvonne Bertram's 2019 book of poetry is titled Travesty Generator in reference to Hugh Kenner and Joseph O'Rourke's Pascal program to “fabricate pseudo-text” by producing text such that each n-length string of characters in the output occurs at the same frequency as in the source text. Whereas for Kenner and O'Rourke, labeling their work a “travesty” is a hyperbolic tease or a literary burlesque, for Bertram, the travesty is the political reality of racism in America. For each of the works Travesty Generator, Bertram uses the generators of computer poetry to critique, resist, and replace narratives of oppression and to …

Bs Physics, 2023-24, Arkansas State University - Jonesboro

Bachelor of Science and Education

No abstract provided.

Bs Land Surveying And Geomatics, 2023-24, Arkansas State University - Jonesboro

Bachelor of Science and Education

No abstract provided.

Bs Mechanical Engineering, 2023-24, Arkansas State University - Jonesboro

Bachelor of Science and Education

No abstract provided.

A Bim-Based Digital Platform For Assessing The Whole Building Circularity Indicators Of Modular Steel Projects, Yin Min Maung

Chulalongkorn University Theses and Dissertations (Chula ETD)

The construction industry is undergoing a paradigm shift towards sustainable practices, one of which is circular economy (CE). Adopting the CE concept is a complex undertaking, which is characterized by a set of indicators capturing its key aspects. Various tools and techniques are employed to implement this novel concept. An essential step of CE implementation is evaluating the circularity of buildings. This research develops a BIM-based digital platform for assessing the whole building circularity indicators (WBCI) of modular steel projects. The platform is designed to assist in computing these indicators, which requires diverse data inputs and complex interrelated equations. The …

Application Of Machine Learning In Assessing Spatial Distribution Patterns Of Soil Microplastics: A Case Study Of The Bang Pakong Watershed, Thailand, Ugochukwu Ihezukwu

Chulalongkorn University Theses and Dissertations (Chula ETD)

Microplastics (MPs) are persistent environmental pollutants introduced through various factors. Understanding the spatial distribution characteristics of MPs is crucial for developing effective mitigation strategies. However, the relationship between MPs and their covariables remains largely unexplored. In this study, we investigated the abundance of MPs in 40 soil samples from different land-use types in the Bang Pakong Watershed and assessed the applicability of machine learning models for predicting the spatial distribution patterns of soil MPs. The samples were divided into three categories: 1.2 µm-500 µm, 500 µm-1 mm, and 1-2 mm. They were analyzed using ZnCl2 density separation, H2O2 digestion process, …

Unsupervised Image Segmentation In Satellite Imagery Using Deep Learning, Suraj Regmi

Theses

Image segmentation is typically done through supervised learning. Supervised learning requires labeled data, which is costly and time-consuming to acquire. However, unlabeled data is abundant. This research presents an application of the state-of-the-art unsupervised instance segmentation method FreeSOLO in satellite images and benchmarks the method in iSAID, CrowdAI, and PASTIS datasets. The method achieved 0.9%AP₅₀ in the iSAID dataset, 3.1%AP₅₀ on the CrowdAI dataset, and 1.1%AP₅₀ on the PASTIS dataset. On large objects, it achieved 1.2%AP₅₀ in the iSAID dataset and 3.5%AP₅₀ in the CrowdAI dataset. The method was also tested in the UAH periphery …

Adaptive Boundary Layer Sliding Mode Control For Multi-Input-Multi-Output Systems, Tiffany Lodge

Theses

When a nonlinear system is controlled using the conventional sliding mode control, the system input will create a high-frequency chatter, which can damage the system's actuators. The most common method used to prevent chattering is the introduction of a constant boundary layer, but if the disturbance is high, then chattering can still happen in the system input. In this thesis, a sliding mode controller with an adaptive boundary layer is proposed for multi-input-multi-output systems that prevent chattering, even if the disturbance is high. To demonstrate the effectiveness of the proposed controller in suppressing chatter, a robotic arm was modeled in …

The Applications Of Artificial Intelligence In Managing Project Processes And Targets: A Systematic Analysis, Cherie Noteboom, Martinson Ofori, Zixing Shen

Journal of International Technology and Information Management

Artificial intelligence (AI) has emerged as the defining technology of the 21st century and has far-reaching impacts on project management (PM). This study assesses the applications of AI in managing project processes and targets through a systematic analysis of publications from 2017 to 2021. The analysis has revealed interesting insights, trends, gaps, and issues. This study informs the researchers and practitioners of the status of AI applications in the management of project processes and targets. It helps stimulate research efforts that can lead to more advances in applying AI to augment PM practices.

The Need For International Ai Activities Monitoring, Parviz Partow-Navid, Ludwig Slusky

Journal of International Technology and Information Management

This paper focuses primarily on the need to monitor the risks arising from the dual-use of Artificial Intelligence (AI). Dual-use AI technology capability makes it applicable for defense systems and consequently may pose significant security risks, both intentional and unintentional, with the national and international scope of effects. While domestic use of AI remains the prerogative of individual countries, the unregulated and nonmonitored use of AI with international implications presents a specific concern. An international organization tasked with monitoring potential threats of AI activities could help defuse AI-associated risks and promote global cooperation in developing and deploying AI technology. The …

Assessing Activity Of Iot Smart Stuff Using Inertial Sensors, Juan Tarrat

Theses

Inertial sensors, including accelerometers and gyroscopes, are commonly used for capturing and quantifying motion and orientation data. IoT devices use inertial sensors to detect user activity. In this thesis we present the use of inertial sensors for determining user interactions with smart objects of everyday use, that we refer to as Smart Stuff. We present a novel use of inertial sensor to assess the use and state of the smart water bottle configured as IoT appliance. Staying hydrated is crucial for health and wellbeing; precise monitoring of user hydration is very important for the elderly and patients with chronic conditions. …

On The Existence Of Transversals In Latin Squares Generated From Algebraic Structures, Patrick Eads

Theses

A Latin square in an n x n array of symbols in which each row and each column is a permutation of the n symbols. A selection of n cells from this array that lie on different rows and different columns and contain all n symbols is a transversal of the Latin square. Two longstanding conjectures concern the existence of transversals, Ryser’s conjecture and Brualdi’s conjecture. This thesis examines some of the results that have been achieved in investigating these conjectures, particularly in the cases of Latin squares generated from the Cayley tables of non-associative algebraic structures. A new method …

Method To Determine Refractive Index By Use Of Optical Focal Shift, Michael Burleson

Theses

Documentation for optical polymer refractive indices tend to be listed for one wavelength, λ_d = 587.56 nm, out to only 2 decimal places. Optical glass catalogues generally list index values to 5 decimal places for 10-15 different wavelengths. This thesis describes a new approach to an old method to determine the indices of polymer samples at λ_HeNe = 632.8 nm (HeNe). It begins by introducing methods for measuring refractive index and their limitations. The property of Snell’s Law is then presented and it is shown how, with specific interferometer equipment, to determine the refractive index of a …

Learning To Calibrate Trust Through Explainability, Amber F. Chesser

Theses

Automation has been implemented in a range of machinery. Providing supplementary information about system processes (i.e., explainability) could mitigate over-reliance and enhance operator awareness of potential anomalies. Trust plays a critical role in human- automation collaboration, as over-trust can lead to misuse or over-reliance, while under-trust can result in disuse or the failure to engage automation when it could enhance performance. Dynamic learned trust and situational trust fluctuate during an operator's interaction with a system and can be influenced by the rate of system failures or workload respectively. Design features like explainability can impact perceived usefulness and help users identify …

Assessment Of Atmospheric Correction Algorithms For The Remote Sensing Of Water Quality In Southeastern U.S. Estuaries, Jerome Reimers

College of Graduate Studies: Theses & Dissertations

Water quality is a key indicator in understanding and representing an environment's overall health. Through developments in remote sensing, we can utilize satellite imagery to measure water parameters in each aquatic system. When accurate atmospheric correction is performed, remote sensing can account for atmospheric attenuation and scattering effects to better measure the reflectance and estimate optically active constituents (OAC) present in upper water columns. Atmospheric Correction for OLI lite (ACOLITE) is an atmospheric correction algorithm designed specifically for robust atmospheric correction of water surfaces, in comparison to algorithms designed more for land surfaces such as the European Space Agency’s (ESA) …

The Impact Of Weather Shocks On Employment Outcomes: Evidence From South Africa, Harriet Margaret Brookes Gray, Vis Taraz, Simon Halliday

Environmental Science and Policy: Faculty Publications

Climate change is increasing the frequency of extreme weather events, such as drought and heat waves. In this paper, we assess the impact of drought and high temperatures on the employment outcomes of working-age individuals in South Africa between 2008 and 2017. We merge high-resolution weather data with detailed individual-level survey data on labor market outcomes, and estimate causal impacts using a fixed effects framework. We find that increases in the occurrence of drought reduce overall employment. These effects are concentrated in the tertiary sector, amongst informal workers, and in provinces with a higher reliance on tourism. Taken together, our …

On The Chronological Understanding Of The Homogeneous Dielectric Barrier Discharge, Xinpei Lu, Zhi Fang, Dong Dai, Tao Shao, Feng Liu, Cheng Zhang, Dawei Liu, Lanlan Nie, Chunqi Jiang

Bioelectrics Publications

Dielectric barrier discharges (DBD) are widely utilised non-equilibrium atmospheric pressure plasmas with a diverse range of applications, such as material processing, surface treatment, light sources, pollution control, and medicine. Over the course of several decades, extensive research has been dedicated to the generation of homogeneous DBD (H-DBD), focussing on understanding the transition from H-DBD to filamentary DBD and exploring strategies to create and sustain H-DBD. This paper first discusses the influence of various parameters on DBD, including gas flow, dielectric material, surface conductivity, and mesh electrode. Secondly, a chronological literature review is presented, highlighting the development of H-DBD and the …

A System Of Equations Involving The Fractional P-Laplacian And Doubly Critical Nonlinearities, Mousomi Bhakta, Kanishka Perera, Firoj Sk

Mathematics and System Engineering Faculty Publications

This article deals with existence of solutions to the following fractional p -Laplacian system of equations: (- Δp)s u = |u| p s∗-2 u + γ α/ps∗ |u|α-2 u |v|β in ω, (-Δp)s v = |v| ps∗ - 2 v + γ β /ps∗ |v|β - 2 v |u|α in ω, where s ϵ (0, 1), p ϵ (1, ∞) with N > sp, α, β > 1 such that α + β = ps∗ := Np/ N - sp and ω = ℝN or smooth bounded domains in ℝN. When ω = ℝN and γ = 1, we show that any …

Supervised Methods For Modeling Spatiotemporal Glacier Variations By Quantification Of The Area And Terminus Of Mountain Glaciers Using Remote Sensing, Robbins Edmund, Thu Thu Hlaing, Jonathan Webb, Nezamoddin N. Kachouie

Mathematics and System Engineering Faculty Publications

Glaciers are important indictors of climate change as changes in glaciers physical features such as their area is in response to measurable evidence of fluctuating climate factors such as temperature, precipitation, and CO2. Although a general retreat of mountain glacier systems has been identified in relation to centennial trends toward warmer temperatures, there is the potential to extract a great deal more information regarding regional variations in climate from the mapping of the time history of the terminus position or surface area of the glaciers. The remote nature of glaciers renders direct measurement impractical on anything other than a local …

Deep Learning-Based Prediction Of Stress And Strain Maps In Arterial Walls For Improved Cardiovascular Risk Assessment, Yasin Shokrollahi, Pengfei Dong, Changchun Zhou, Xianqi Li, Linxia Gu

Mathematics and System Engineering Faculty Publications

Conducting computational stress-strain analysis using finite element methods (FEM) is a common approach when dealing with the complex geometries of atherosclerosis, which is a leading cause of global mortality and complex cardiovascular disease. The considerable expense linked to FEM analysis encourages the substitution of FEM with a considerably faster data-driven machine learning (ML) approach. This study investigated the potential of end-to-end deep learning tools as a more effective substitute for FEM in predicting stress-strain fields within 2D cross sections of arterial walls. We first proposed a U-Net-based fully convolutional neural network (CNN) to predict the von Mises stress and strain …

Aerobert-Classifier: Classification Of Aerospace Requirements Using Bert, Archana Tikayat Ray, Bjorn F. Cole, Olivia J. Pinonfischer, Ryan T. White

Mathematics and System Engineering Faculty Publications

The system complexity that characterizes current systems warrants an integrated and comprehensive approach to system design and development. This need has brought about a paradigm shift towards Model-Based Systems Engineering (MBSE) approaches to system design and a departure from traditional document-centric methods. While MBSE shows great promise, the ambiguities and inconsistencies present in Natural Language (NL) requirements hinder their conversion to models directly. The field of Natural Language Processing (NLP) has demonstrated great potential in facilitating the conversion of NL requirements into a semi-machine-readable format that enables their standardization and use in a model-based environment. A first step towards standardizing …

Modeling Current And Future Saltmarsh Distribution In Arcata Marsh, Madeline Kay Mcnerthney

Cal Poly Humboldt theses and projects

Saltmarsh habitat is vulnerable to Sea Level Rise (SLR) and requires long-term management plans for communities to continue to benefit from their ecosystem services. This study analyzed the variation of above-ground vegetation biomass throughout I Street Marsh, using multiple variables, including classified vegetative community types, elevation and remote sensing indexes comprised of both visual (Red, Green, Blue) and non-visual (Red Edge, Near Infrared) bands. Plant community types were classified using a cluster analysis, and distinguished three communities, based on dominant species: Salicornia, Spartina, and a mixed type (diverse floristic makeup, with no dominant species). Above-ground biomass was significantly higher in …

Fostering Engagement With Voicethread In Online Intermediate Spanish Language Classes, Karen Acosta, Ericka H. Parra Dr

The Coastal Review

It is estimated that more than 1.5 billion students have been affected during the course of the global coronavirus pandemic by school and university closures. As a way to navigate this new instructional landscape, the researchers aimed to find a tool that would allow students to develop and practice communicative language skills in their online Spanish classes. In this research study, participants used VoiceThread over the course of a semester and then reflected on their comfort level using communicative skills in Spanish before and after using the tool, as well as whether they perceived that using the platform in their …

Generalized Additive Models For Predicting Sea Level Rise In Coastal Florida, Vaidya N. Hanna, Robert D. Breininger, Marisela Madrid, Steven Lazarus, Nezamoddin N. Kachouie

Mathematics and System Engineering Faculty Publications

Within the last century, the global sea level has risen between 16 and 21 cm and will likely accelerate into the future. Projections from the Intergovernmental Panel on Climate Change (IPCC) show the global mean sea level (GMSL) rise may increase to up to 1 m (1000 mm) by 2100. The primary cause of the sea level rise can be attributed to climate change through the thermal expansion of seawater and the recession of glaciers from melting. Because of the complexity of the climate and environmental systems, it is very difficult to accurately predict the increase in sea level. The …