Digital Commons Network^™

Application Of Machine Learning In Geophysics: Ranking Teleseismic Shear Wave Splitting Measurements And Classifying Different Types Of Earthquakes, Yanwei Zhang

Doctoral Dissertations

"During the past decades, applications of Machine Learning have been explosively developed to solve various academic and industrial problems, and over-human performance has been shown in diverse areas. In geophysical research, Machine Learning, especially Convolutional Neural Network (CNN), has been applied in numerous studies and demonstrated considerable potential. In this study, we applied CNN to solve two geophysical problems, ranking teleseismic shear splitting (SWS) measurements and classifying different types of earthquakes.

For ranking teleseismic SWS measurements, we utilized a CNN-based method to automatically select reliable SWS measurements. The CNN was trained by human-verified teleseismic SWS measurements and tested using synthetic …

Mantle Flow And Transition Zone Discontinuities Beneath The Carribean Plate: Constraints From Shear Wave Splitting And Receiver Function Analyses, Tu Xue

Doctoral Dissertations

"Azimuthal anisotropy quantified by teleseismic SKS, SKKS, PKS (“XKS”) and local S wave splitting parameters is used to investigate lithospheric deformation and asthenospheric flow beneath the boundary zone of the North American and Caribbean plates and adjacent areas. A total of 4915 XKS and 1202 pairs of local S wave splitting parameters were obtained at 24 broad band seismic stations. The XKS observations can be divided into two groups based on the spatial distribution of the resulting fast polarization orientations. Those observed on the Caribbean Plate are mostly WNW-ESE which are roughly trench-parallel. In contrast, the fast orientations observed on …

Far-End Crosstalk Modeling And Prediction For High-Speed Pcb Design With Inhomogeneous Dielectric Layers (Idls), Yuanzhuo Liu

Doctoral Dissertations

"Far-end crosstalk (FEXT) noise is a critical factor that affects signal integrity performance in high-speed systems. The FEXT level is sensitive to the inhomogeneity of the dielectric layers in fabricated printed circuit boards (PCB). The stripline is laminated by multiple inhomogeneous dielectric layers (IDL). The dielectric layers of the stripline are laminated with epoxy resin and glass bundles. The dielectric permittivity of the epoxy resin and glass bundles are different, which causes the inhomogeneity of the dielectric layers while also increasing the FEXT magnitude. The dielectric of the microstrip in printed circuit boards (PCB) fabrication usually consists of two layers: …

Disorder Effects In Frustrated Magnets And Absorbing State Transitions, Xuecheng Ye

Doctoral Dissertations

"Correlation, topology, and disorder can fundamentally affect the properties of interacting many-particle systems. After a short introduction which covers the basic concepts of phase transitions and scaling as well as the physics of Josephson junctions, the dissertation focuses on three separate projects.

The first project is motivated by the stripe and nematic phases observed e.g. in cuprate superconductors and iron pnictides. To understand the effects of disorder on such phases, we have investigated the behavior of the diluted J₁-J₂ Ising model. Spinless impurities generate a random-field disorder for the spin-density (stripe) order parameter, which destroys the stripe …

Novel Ferromagnetic Materials With Improved Mechanical Performance, Wesley Alexander Everhart

Doctoral Dissertations

"The ductility of intermetallics has long been a hindrance to their broad adaptation despite a significant range of properties such as magnetic, half-metallic, and shape memory behavior. The lack of a general theory for the ductility of intermetallics along with the lack of prior art that experimentally measured mechanical properties drives the need for significant investment in many of these novel magnetic materials in order to even understand, let alone correct, poor ductility.

This dissertation includes work that explored the effect of vanadium content and quenching rate on the microstructure and ductility of Fe-Co alloys. Results indicated that a martensitic …

Development And Application Of Ensemble Machine Learning Algorithms To Enable A Priori, High-Fidelity, And Prompt Predictions And Optimizations Of Complex Materials And Systems, Taihao Han

Doctoral Dissertations

"Complex materials consisting of multiple chemical components/phases have been widely used in different engineering applications that have strict criteria. To optimize the mixture design of complex materials, researchers invest enormous resources in cumbersome experiments. However, due to substantial variations in precursors and processing techniques, it has been challenging to develop theoretical frameworks (i.e., empirical models) that could produce reliable predictions of properties of complex materials. In recent years, scientists have harnessed the power of machine learning (ML) and “Big” data to uncover the underlying mixture design-property correlations and produce high-fidelity predictions of properties of complex materials. The ML models autonomously …

Multifunctional Behaviors Of Two-Dimensional Materials And Their Composites, Yanxiao Li

Doctoral Dissertations

"Two-dimensional (2D) materials, including graphene, transition metal carbides or nitrides (TMC/Ns), have rich surface chemistry, superb electrical and mechanical properties. These unique properties make them ideal for multifunctional devices. Among them, we focused on graphene and TMC/Ns (i.e., MXenes), as well as their composites. Unlike the well-known graphene, MXenes, are relatively new and typically synthesized by the selective etching of the “A” layers from the layered carbides and /or nitrides known as MAX phases, which introduce MXenes with rich terminal groups (e.g. -O-, -OH, -F).

During my Ph.D. study, firstly, the adhesive and frictional behaviors, which are related to successful …

Modelling And Design Of Holographic Optical Elements For Beam-Coupling Applications For A Range Of Incident Beam Angles, Dipanjan Chakraborty, Rosen Georgiev, Sinéad Aspell, Vincent Toal, Izabela Naydenova, Dervil Cody, Suzanne Martin

Articles

Theoretical modelling has been used to calculate the holographic recording beam angles required in air (at any recording wavelength) to produce a Volume Holographic Optical Element (VHOE) for any defined input and output beam angles. The approach is used to facilitate the design and fabrication of diffractive coupling elements through a holographic process that avoids the use of coupling prisms during recording and will help in the design of recording arrangements that better suit the mass production of low-cost elements, especially those designed for non-normal incidence. In this study, the recording angles needed for a range of recording wavelengths were …

Application Of Advanced Non-Linear Spectral Decomposition And Regression Methods For Spectroscopic Analysis Of Targeted And Non-Targeted Irradiation Effects In An In-Vitro Model, Ciara Slattery, Khanh Nguyen, Laura Shields, Isabel Vega Carrascal, Sean Singleton, Fiona Lyng, Brendan Mcclean, Aidan Meade

Articles

Irradiation of the tumour site during treatment for cancer with external-beam ionising radiation results in a complex and dynamic series of effects in both the tumour itself and the normal tissue which surrounds it. The development of a spectral model of the effect of each exposure and interaction mode between these tissues would enable label free assessment of the effect of radiotherapeutic treatment in practice. In this study Fourier transform Infrared microspectroscopic imaging was employed to analyse an in-vitro model of radiotherapeutic treatment for prostate cancer, in which a normal cell line (PNT1A) was exposed to low-dose X-ray radiation from …

Regional Variations And Temporal Trends Of Childhood Myopia Prevalence In Africa: A Systematic Review And Meta-Analysis, Emmnuel Kobia Acquah, Daniel Ian Flitcroft, Prince Kwaku Akowuah, Gareth Lingham, James Loughman

Articles

Purpose: To provide contemporary and future estimates of childhood myopia prevalence in Africa.

Methods: A systematic online literature search was conducted for articles on childhood (≤18 years) myopia (spherical equivalent [SE] ≤ −0.50D; high myopia: SE ≤ −6.00D) in Africa. Population-or school-based cross-sectional studies published from 1 Jan 2000 to 30 May 2021 were included. Meta-analysis using Freeman–Tukey double arcsine transformation was performed to estimate the prevalence of childhood myopia and high myopia. Myopia prevalence from subgroup analyses for age groups and settings were used as baseline for generating a prediction model using linear regression.

Results: Forty-two studies from 19 …

Preclassification Of Broadband And Sparse Infrared Data By Multiplicative Signal Correction Approach, Hafeez Ur Rehman, Valeria Tafintseva, Boris Zimmermann, Johanne Heitmann Solheim, Vesa Virtanen, Rubina Shaikh, Ervin Nippolainen, Isaac Afara, Simo Saarakkala, Lassi Rieppo, Patrick Krebs, Polina Fomina, Boris Mizaikoff, Achim Kohler

Articles

Preclassification of raw infrared spectra has often been neglected in scientific literature. Separating spectra of low spectral quality, due to low signal-to-noise ratio, presence of artifacts, and low analyte presence, is crucial for accurate model development. Furthermore, it is very important for sparse data, where it becomes challenging to visually inspect spectra of different natures. Hence, a preclassification approach to separate infrared spectra for sparse data is needed. In this study, we propose a preclassification approach based on Multiplicative Signal Correction (MSC). The MSC approach was applied on human and the bovine knee cartilage broadband Fourier Transform Infrared (FTIR) spectra …

Classification Of Cytological Samples From Oral Potentially Malignant Lesions Through Raman Spectroscopy: A Pilot Study, Isha Behl, Genecy Calado, Anika Vishwakarma, Damien Traynor, Stephen Flint, Sheila Galvin, Claire M. Healy, Marina Leite Pimentel, Alison Malkin, Hugh J. Byrne, Fiona M. Lyng

Articles

The potential of Raman microspectroscopy of exfoliated cells has been demonstrated for oral cancer diagnosis. In this study, brush biopsies were collected from the buccal mucosa/tongue of healthy donors (n = 31) and from oral mucosal dysplastic lesions (n = 31 patients). Raman spectra were acquired and subjected to partial least squares-discriminant analysis (PLS-DA). The patient samples could be differentiated from healthy donor samples with 96% sensitivity and 95% specificity. Furthermore, PLS-DA models were developed based on cytopathological and histopathological assessment. Low and high grade dysplasia could be discriminated with 64% sensitivity and 65% specificity based on cytopathological assessment, while …

Measuring Semantic Similarity Of Documents By Using Named Entity Recognition Methods, David Efraín Muñoz Morales

Masters

The work presented in this thesis was born from the desire to map documents with similar semantic concepts between them. We decided to address this problem as a named entity recognition task, where we have identified key concepts in the texts we use, and we have categorized them. So, we can apply named entity recognition techniques and automatically recognize these key concepts inside other documents. However, we propose the use of a classification method based on the recognition of named entities or key phrases, where the method can detect similarities between key concepts of the texts to be analyzed, and …

To Investigate The Effects Of Low Plus Prescription Lenses On Quality Of Life And Visual Performance In Children., Patricia Maher

Masters

Aims: The purpose of this study was to investigate the effects of low plus prescription lenses on Quality of life and visual performance data. As part of the study opinions of optometrists regarding paediatric eye care was also explored. Methods: Each one of the 92 participants, aged between 8 and 12 years, attended for three visits, baseline, at 1 month and 3 months. A quality of life questionnaire was completed at each visit. Optometric probes including dynamic retinoscopy, relative accommodation, fusional reserves and stereopsis as well as reading speed were examined. A survey was sent out electronically to optometrists followed …

Author Correction: Neutrophil To Lymphocyte Ratio Influences Impact Of Steroids On Efficacy Of Immune Checkpoint Inhibitors In Lung Cancer Brain Metastases, Manmeet Ahluwalia

All Publications

No abstract provided.

Dynamic Effect Of Disintegrated Energy Consumption And Economic Complexity On Environmental Degradation In Top Economic Complexity Economies, Tomiwa Sunday Adebayo, Mehmet Altuntaş, Sanjar Goyibnazarov, Ephraim Bonah Agyekum, Hossam Zawbaa, Salah Kamel

Articles

The current paper explores the influence of disintegrated energy and economic complexity on CO2 emissions (CO2) in the top economic complexity economies. The model also incorporates other drivers of CO2, such as technological innovation and economic growth. The current research utilizes data stretching from 1993 to 2018. The research employed Westerlund cointegration, fully modified OLS (FMOLS), dynamic OLS (DOLS), and method of moments quantile regression (MMQR) to evaluate these interconnections. The outcomes of the slope heterogeneity and cross-sectional dependence affirmed the use of second-generation techniques. The study confirmed the long-run association between CO2 and the regressors. The results of the …

Formation Of Gold Nanoparticle Self-Assembling Films In Various Polymer Matrices For Sers Substrates, Ksenia A. Maleeva, Ilia E. Kaliya, Anton P. Tkach, Anton A. Babaev, Michail Baranov, Kevin Berwick, Tatiana S. Perova, Alexander V. Baranov, Kirill V. Bogdanov

Articles

Surface-enhanced Raman spectroscopy (SERS) is regarded as a versatile tool for studying the composition and structure of matter. This work has studied the preparation of a SERS substrate based on a self-assembling plasmonic nanoparticle film (SPF) in a polymer matrix. Several synthesis parameters for the SPF are investigated, including the size of the particles making up the film and the concentration and type of the self-assembling agent. The result of testing systems with different characteristics is discussed using a model substance (pseudo isocyaniniodide). These models can be useful in the study of biology and chemistry. Research results contain the optimal …

Analysis Of Power Quality Issues Of Different Types Of Household Applications, T.M. Thamizh Thentral, R. Palanisamy, S. Usha, Mohit Bajaj, Hossam Zawbaa, Salah Kamel

Articles

Most of the loads used in our day-to-day life are non-linear in nature. To investigate the performance of various non-linear loads, a laboratory setup on different load combinations such as light, fan and drive system in this work. The unbalance in supply voltages, supply current and frequency, reduction in power factor and total harmonic distortion for current and voltages are monitored through this lab setup and also the results obtained from these systems are discussed in this paper. To check the nature of voltage, current, reactive power and power factor in real-time systems, a turret punch machine incorporated with several …

Choosing Death, Shaping Death: Assumptions About Disabilities, Race, And Death, Janet L. Dolgin

Hofstra Law Faculty Scholarship

No abstract provided.

Psychologists’ Graduate Training Experience And Attitudes In Religion And Spirituality, Kristi Santiago

Graduate School of Professional Psychology: Doctoral Papers and Masters Projects

In a nationwide poll, 76% of the population of the United States identifies with a formal religion of some kind (Gallup Organization, 2021). Despite the prevalence of religion and spirituality (R/S) throughout the country, graduate programs appear to neglect training on this multicultural issue. The purpose of this paper is to better understand psychologists’ attitudes toward the quality and depth of their graduate training in R/S, determine how competent psychologists feel at managing discussions of R/S within psychotherapy, and recommend necessary improvements to graduate training in R/S. Data was collected using a 24-item, online survey, which was circulated throughout college …

Wcbu Annual Report, 2022, Wcbu, Bradley University

WCBU Annual Report

Annual report for WCBU, an NPR Network radio station licensed to Bradley University and operated by Illinois State University via WGLT

First Do Not Harm: Revisiting Meriwether V. Hartop And Academic Freedom In Higher Education, Inara Scott, Elizabeth Brown, Eric Yordy

American University Law Review

repeal and amend substantive statutes unilaterally, a power that can threaten bedrock commitments to our federalism and to our constitutional rights to the jury. The decisions about how and when to displace state law in favor of federal law and about how and when to grant powers to juries over judges cannot be vested in the Judicial Branch alone without the structural restraints of an Article III “case or controversy.” The paper concludes by offering some ways to fix our evidence law and to put it on firmer footing, permitting better power-sharing and dialogue between two branches of government—Congress and …

Solving The Procedural Puzzles Of The Texas Heartbeat Act And Its Imitators: The Limits And Opportunities Of Offensive Litigation, Howard M. Wasserman, Charles W. Rhodes

American University Law Review

The Texas Heartbeat Act, enacted in 2021 as Senate Bill 8 (S.B. 8), prohibits abortions following detection of a fetal heartbeat, a constitutionally invalid ban under current Supreme Court precedent. But the method of enforcement in the Texas law is unique—it prohibits enforcement by government officials in favor of private civil actions brought by “any person,” regardless of injury. Texas sought to burden reproductive-health providers and rights advocates with costly litigation and potentially crippling liability.

In a series of articles, we explore how S.B. 8's reliance on exclusive private enforcement at the expense of public enforcement creates procedural and jurisdictional …

The Truth About Design Patents, Sarah Burstein, Saurabh Vishnubhakat

American University Law Review

Design patents are hot. Scholars and policymakers are increasingly focusing on this once-niche area of law. However, many of the empirical studies in this area— including old ones that still get cited—were methodologically questionable from the start, have become outdated, or both. In this Article, we make two sets of contributions to this important and underdeveloped literature. First, we review the empirical studies of design patents thus far, including those that pre- and post-date the creation of the U.S. Court of Appeals for the Federal Circuit, and we update the findings of those studies. Second, we consider a set of …

Review Of Veterans Law Decisions Of The Federal Circuit, 2021 Edition, Angela Drake, Yelena Duterte, Stacey-Rae Simcox

American University Law Review

In the past year, the United States Court of Appeals for the Federal Circuit (Federal Circuit) continued to define boundaries for the Department of Veterans Affairs (VA) and the U.S. Court of Appeals for Veterans Claims (Veterans Court). These boundaries align more closely with congressional intent, especially with regard to the jurisdiction of the Veterans Court and the internal operations of the agency.

This Area Summary discusses eight major areas in which the Federal Circuit articulated important changes in veterans law. First, the Federal Circuit revisited the important and veteran-friendly “benefit of the doubt” rule in Lynch and modified it. …

Year In Review: The Federal Circuit's 2021 Government Contract Law Decisions, Morgan W. Huston, Nicholas Feldstern, Camille Chambers

American University Law Review

It has been almost forty years since Congress created the United States Court of Appeals for the Federal Circuit with the goal of ensuring uniform and definitive judicial interpretations of the law applicable to Federal Government contracting. Because, like that of the Court of Claims before it, the precedent of the Federal Circuit guides how procurement laws are interpreted, it is important for practitioners and those whose livelihoods depend on government contracting to pay attention to the decisions that the Federal Circuit issues.

First Amendment Challenges To State Vaccine Mandats: Why The U.S. Supreme Court Should Hold That The Free Exercise Clause Does Not Require Religious Exemptions, Donna M. Gitter

American University Law Review

The U.S. Supreme Court has never issued a judicial opinion on the merits declaring that the First Amendment Free Exercise Clause permits states to mandate vaccinations without offering religious exemptions. However, in two recent cases, the Court in brief orders declined applications for emergency relief to block state vaccine mandates, and the petitioners have vowed to continue to pursue these cases.

This Article explores how the seemingly sudden onset of the coronavirus pandemic, coupled with its protracted duration, has occasioned both emergency and enduring state regulation of religious behavior in a way that exposes deep divides in our society’s views …

Judicial Review Of Emergency Administration, Desiree Leclercq

American University Law Review

This Article seeks to describe and defend the judicial review of federal agencies’ responses to national emergencies - what I refer to as “emergency administration.” That may prove difficult. Agencies are experts in their respective fields. During emergencies, scholars and policymakers assume that judges will defer to that expertise under the Administrative Procedure Act (APA ). On January 13, 2022, the Supreme Court defied that assumption when it blocked the Biden Administration s workplace vaccine and masking rules. Critics now assume that judges are reviewing emergency administration to constrain regulation. Both assumptions conclude that judicial review is neither sincere nor …

The Constitutional Costs Of School Policing, Maryam Ahranjani, Natalie Saing

American University Law Review

Responding to fears of violence and liability on K-12 campuses, local school boards and superintendents have made on-site or embedded school police omnipresent in American public schools. Yet, very little attention is paid to the many costs associated with their presence. When situating law enforcement’s presence squarely in the racist history of policing and school policing, the juxtaposition with the civic purpose of public education reveals significant constitutional costs. This Article builds on existing scholarship by bringing attention to the conflict between the First, Fourth, Fifth, Eighth, and Fourteenth Amendments and the dimensions of embedded school police. Ultimately, schools must …

Hinterlands To Cities: The Archaeology Of Northwest Mexico And Its Vecinos, Matthew C. Pailes, Michael T. Searcy

Faculty Publications

Tis approachable book is a comprehensive synthesis of Northwest Mexico from the US border to the Mesoamerican frontier. Filling a vital gap in the regional literature, it serves as an essential reference not only for those interested in the specific history of this area of Mexico but western North America writ large. A period-by-period review of approximately14,000 years reveals the dynamic connections that knitted together societies inhabiting the Sea of Cortez coast, the Sonoran and Chihuahuan deserts, and the Sierra Madre Occidental. Networks of interaction spanned these diverse ecological, topographical, and cultural terrains in the millennia following the demise of …