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Transport Effects In Non-Hermitian Nonreciprocal Systems: General Approach, Hamed Ghaemi-Dizicheh Mar 2023

Transport Effects In Non-Hermitian Nonreciprocal Systems: General Approach, Hamed Ghaemi-Dizicheh

Physics & Astronomy Faculty Publications

In this paper, we present a unifying analytical framework for identifying conditions for transport effects such as reflectionless and transparent transport, lasing, and coherent perfect absorption in non-Hermitian nonreciprocal systems using a generalized transfer matrix method. This provides a universal approach to studying the transport of tight-binding platforms, including higher-dimensional models and those with an internal degree of freedom going beyond the previously studied case of one-dimensional chains with nearest-neighbor couplings. For a specific class of tight-binding models, the relevant transport conditions and their signatures of non-Hermitian, nonreciprocal, and topological behavior are analytically tractable from a general perspective. We investigate …

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Extending Token Economy Systems For Children With Learning Disabilities And Developmental Disabilities Using Operant Behavioral Economics, Parker Levins Mar 2023

Extending Token Economy Systems For Children With Learning Disabilities And Developmental Disabilities Using Operant Behavioral Economics, Parker Levins

LSU Master's Theses

Token economy systems have been used successfully in various general and special education classrooms. Although effective, educators seldom have a priori information on the performance of their reinforcers within the schedules of reinforcement that comprise the token economy. Most token economies are initially designed based on clinical judgment and respective schedules are typically selected on an arbitrary basis (e.g., token-production Fixed Ratio 1 [FR1], exchange-production FR5). This introduces uncertainty whereby the initial arrangement may be too lax (i.e., work expectations are low for the student) or too strict (i.e., work expectations are high for the student), which both have the …

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Body Dimension And Length-Weigh Relationships Of Invasive Exotic Earthworm Species In Huron Mountains Forests, Paula Arroyo, Xiaoyong Chen, Timothy Gsell, John A. Yunger, Mary E. Carrington Mar 2023

Body Dimension And Length-Weigh Relationships Of Invasive Exotic Earthworm Species In Huron Mountains Forests, Paula Arroyo, Xiaoyong Chen, Timothy Gsell, John A. Yunger, Mary E. Carrington

Research Days

Invasive exotic earthworms have undesired ecological effects on structure, function, and biodiversity of forest ecosystems in the Great Lakes region. Biological parameters including body length, weight, growth rate, and regeneration patterns of earthworms are necessary to understand their life cycle and impacts on ecological processes such as nutrient biogeochemistry cycling and carbon sequestration in the forests, as well as for forest management practices. In this work, earthworms were surveyed in main forest types of the Huron Mountains Preserve of Michigan, Upper Peninsula during the period of May 2021 to October 2022. Earthworms were captured from established sampling quadrates using a …

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Post Secondary Leadership: Promoting Leadership Development In Average Achieving Students, Deborah J. Clair Mar 2023

Post Secondary Leadership: Promoting Leadership Development In Average Achieving Students, Deborah J. Clair

Research Days

This proposed research seeks to explore the intersection of leadership and average-achieving high school students. Specifically, the study aims to shed light on the experiences of adults who were once perceived as average-achieving high school students but possessed innate talents and abilities that were overlooked and excluded from leadership opportunities during their time in high school. Despite facing deficit thinking by school administration due to their grades, these individuals went on to become successful leaders in their careers. While there have been anecdotal claims and media coverage of the success of average-achieving students, there has been limited formal research conducted …

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From Space To The Streets: Leveraging Satellite Data For Air Pollution, Health, And Justice, Gaige Kerr Mar 2023

From Space To The Streets: Leveraging Satellite Data For Air Pollution, Health, And Justice, Gaige Kerr

Sustainability Seminar Series

Ambient air disproportionately affects marginalized and minoritized communities in the United States. Satellite remote sensing provides crucial data needed to assess air pollution at a high spatial resolution and further understand the drivers, extent, and impacts of this form of environmental injustice. I provide a few vignettes to highlight how recent advances in remote sensing can inform and improve our understanding of environment health. First, satellite measurements and datasets that incorporate satellite data demonstrate the inequitable distribution of traffic-related pollutants such as nitrogen dioxide and fine particulate matter and how disparities have changed during recent years, including during the COVID-19 …

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Taylor Mathematics Adds Data Science Major, Taylor University Mar 2023

Taylor Mathematics Adds Data Science Major, Taylor University

2023 Website News Stories

No abstract provided.

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Electric Utility Performance In The Mountain West, Hira Ahmed, Miguel Soriano Ralston, Caitlin J. Saladino, William E. Brown Jr. Mar 2023

Electric Utility Performance In The Mountain West, Hira Ahmed, Miguel Soriano Ralston, Caitlin J. Saladino, William E. Brown Jr.

Environment

This fact sheet examines select data from the Citizens Utility Board (CUB) report, “Electric Utility Performance: A State-By-State Review,” which provides information on the affordability, reliability, and environmental responsibility of electric utility energy consumption. The original report provides a comprehensive state-by-state profile of utility performance in the United States. These data were originally reported by the Energy Information Administration (EIA) of the U.S. Department of Energy. This federal entity is responsible for the aggregation and dissemination of information about the American energy industry. This fact sheet highlights energy sources, affordability, reliability, and environmental impact of energy consumption in the Mountain …

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Paek- And Pes-Like Perarylated Phosphonium Ionenes: Synthesis, Thermal Properties, And Conductivity, Samantha M. Sims, Hannah Brown, Jalisha R. Hunter, R. Daniel Johnson, Rachel E. Whittaker, Kevin M. Miller Mar 2023

Paek- And Pes-Like Perarylated Phosphonium Ionenes: Synthesis, Thermal Properties, And Conductivity, Samantha M. Sims, Hannah Brown, Jalisha R. Hunter, R. Daniel Johnson, Rachel E. Whittaker, Kevin M. Miller

Faculty & Staff Research and Creative Activity

Perarylated phosphonium salts are known to exhibit high degrees of thermal stability, often in excess of 400 °C. Here, the thermal and conductive properties of a series of perarylated phosphonium ionenes, prepared utilizing a PAEK-/PES-like synthetic approach, is described. All of the ionenes were found to display Td5% values in excess of 365 °C. Structural changes in the polymer backbone were found to have a prominent impact on Tg, with the meta-analogs exhibiting values ∼45 °C below the para-analogs, emphasizing the significant impact that solid-state packing can have on thermal transitions. All of the phosphonium ionenes …

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Regular Solutions To Elliptic Equations, Alfonso Castro, Jon T. Jacobsen Mar 2023

Regular Solutions To Elliptic Equations, Alfonso Castro, Jon T. Jacobsen

All HMC Faculty Publications and Research

A review of results and techniques on the existence of regular radial solutions to second order elliptic boundary value problems driven by linear and quasilinear operators is presented. Of particular interest are results where the solvability of a given elliptic problem can be analyzed by the relationship between the spectrum of the operator and the behavior of the nonlinearity near infinity and at zero. Energy arguments and Pohozaev type identities are used extensively in that analysis. An appendix with a proof of the contraction mapping principle best suited for using continuous dependence to ordinary differential equations on initial conditions is …

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Neutrosophic Mcdm Methodology For Assessment Risks Of Cyber Security In Power Management, Ahmed M. Abdelmouty, Ahmed Abdel-Monem Mar 2023

Neutrosophic Mcdm Methodology For Assessment Risks Of Cyber Security In Power Management, Ahmed M. Abdelmouty, Ahmed Abdel-Monem

Neutrosophic Systems with Applications

Every day, new reports of cyberattacks on interconnected control systems emerge. The vulnerability of their communication mechanism makes similar control systems a target for malicious outsiders. Protecting sensitive data and maintaining network reliability and availability are two of the main reasons why network security is so important. Strong and dependable network security strategies use a number of safeguards to protect users and businesses from malware and cyber assaults like distributed denial of service. A safety analysis is an essential step that must precede the introduction of any security measures. There hasn't been much experience with cyberattacks on power control systems …

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Ceers Key Paper. Ii. A First Look At The Resolved Host Properties Of Agn At 3 < Z < 5 With Jwst, Dale D. Kocevski, Guillermo Barro, Elizabeth J. Mcgrath, Steven L. Finkelstein, Micaela B. Bagley, Henry C. Ferguson, Shardha Jogee, Guang Yang, Mark Dickinson, Nimish P. Hathi, Bren E. Backhaus, Eric F. Bell, Laura Bisigello, Véronique Buat, Denis Burgarella, Caitlin M. Casey, Nikko J. Cleri, M. C. Cooper, Luca Costantin, Darren Croton, Emanuele Daddi, Adriano Fontana Mar 2023

Ceers Key Paper. Ii. A First Look At The Resolved Host Properties Of Agn At 3 < Z < 5 With Jwst, Dale D. Kocevski, Guillermo Barro, Elizabeth J. Mcgrath, Steven L. Finkelstein, Micaela B. Bagley, Henry C. Ferguson, Shardha Jogee, Guang Yang, Mark Dickinson, Nimish P. Hathi, Bren E. Backhaus, Eric F. Bell, Laura Bisigello, Véronique Buat, Denis Burgarella, Caitlin M. Casey, Nikko J. Cleri, M. C. Cooper, Luca Costantin, Darren Croton, Emanuele Daddi, Adriano Fontana

Pacific Faculty Work

We report on the host properties of five X-ray-luminous active galactic nuclei (AGN) identified at 3 < z < 5 in the first epoch of imaging from the Cosmic Evolution Early Release Science Survey. Each galaxy has been imaged with the JWST Near-Infrared Camera, which provides rest-frame optical morphologies at these redshifts. We also derive stellar masses and star formation rates for each host by fitting its spectral energy distribution using a combination of galaxy and AGN templates. We find that three of the AGN hosts have spheroidal morphologies, one is a bulge-dominated disk, and one is dominated by pointlike emission. None are found to show strong morphological disturbances that might indicate a recent interaction or merger event. When compared to a sample of mass-matched inactive galaxies, we find that the AGN hosts have morphologies that are less disturbed and more bulge-dominated. Notably, all four of the resolved hosts have rest-frame optical colors consistent with a quenched or poststarburst stellar population. The presence of AGN in passively evolving galaxies at z > 3 is significant because a rapid feedback mechanism is required in most semianalytic models and cosmological simulations to explain the growing population of massive quiescent galaxies observed at these redshifts. Our findings show that AGN can continue to inject energy into these systems after their star formation is curtailed, potentially heating their halos and preventing renewed star formation. Additional observations will be needed to determine what role this feedback may play in helping to quench these systems and/or maintain their quiescent state.

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Using Satellites To Map The Urban Heat Island Effect And Using Products To Generate Public Action In Harrisonburg, Trevor Brooks, Timothy A. Kreps Mar 2023

Using Satellites To Map The Urban Heat Island Effect And Using Products To Generate Public Action In Harrisonburg, Trevor Brooks, Timothy A. Kreps

ASPIRE 2023

The Urban Heat Island effect (UHI) is a phenomenon where urban centers are hotter than their surrounding rural counterparts. Ever since it was first discovered there have been a variety of methods of mapping this effect from using terrestrial sensors to satellites. This study attempts to evaluate different mapping methods, specifically two different satellite methods (ECOSTRESS and MODIS). As well as a community driven mapping method that involved terrestrial sensors attached to cars. This study then discusses remedies to the UHI and documents efforts to remedy it through a partnership between researchers, the community, and the city of Harrisonburg as …

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Teacher Attrition: Supporting Teachers Through Mentorship, Tiffany A. Kamper Mar 2023

Teacher Attrition: Supporting Teachers Through Mentorship, Tiffany A. Kamper

Masters Projects

A wealth of research demonstrates that teachers of all career levels are leaving the profession due to dissatisfaction with a variety of working conditions and lack of growth opportunities. Teachers desire a better work-life balance, opportunities to progress in their careers, and collaboration with co-workers and school leaders. Additionally, the research shows that teachers stay in education when they are valued and given the opportunity to use their expertise and voice. Mentorship programs support early-career teachers, while giving midto-late career teachers the opportunity to use their expertise. This project is the development of a two-tiered mentorship program that combines instructional …

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Developing And Analyzing An Explicit Unconditionally Stable Finite Element Scheme For An Equivalent Bérenger’S Pml Model, Yunqing Huang, Jichun Li, Xin Liu Mar 2023

Developing And Analyzing An Explicit Unconditionally Stable Finite Element Scheme For An Equivalent Bérenger’S Pml Model, Yunqing Huang, Jichun Li, Xin Liu

Mathematical Sciences Faculty Research

The original Bérenger’s perfectly matched layer (PML) was quite effective in simulating wave propagation problem in unbounded domains. But its stability is very challenging to prove. Later, some equivalent PML models were developed by Bécache and Joly [ESAIM: M2AN 36 (2002) 87–119] and their stabilities were established. Hence studying and developing efficicent numerical methods for solving those equivalent PML models are needed and interesting. Here we propose a novel explicit unconditionally stable finite element scheme to solve an equivalent Bérenger’s PML model. Both the stability and convergence analysis are proved for the proposed scheme. Numerical results justifying the theoretical …

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Queer Psycho And The He Circus: Applying Queering, Magic, And More-Than-Human Theories To Immersive Visual Story Worlds As An Antidote To Late Capitalism, Eleanor Dare, Dylan Yamada-Rice Mar 2023

Queer Psycho And The He Circus: Applying Queering, Magic, And More-Than-Human Theories To Immersive Visual Story Worlds As An Antidote To Late Capitalism, Eleanor Dare, Dylan Yamada-Rice

School of Art, Design and Architecture

Abstract Two immersive visual story worlds (IVS), Queer Psycho and HE Circus, are at the center of this article, one made by each of us. Individually we found our works necessitated the development of new frameworks for IVS construction, namely (1) Brechtian a-effect and queering, and (2) magic and more-than-human theories. These new framings were needed to realize our desire to use IVS to create spaces of active resistance from psychological harm imposed by political and ableist structures designed with rigid ways of seeing the world through straight/neoliberal lenses. When both story worlds and their frameworks are viewed side-by-side, they …

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Off-Shell Effects In Bound Nucleons And Parton Distributions From 1H, 2H, 3H, And 3He Data, S. I. Alekhin, S. A. Kulagin, Roberto Petti Mar 2023

Off-Shell Effects In Bound Nucleons And Parton Distributions From 1H, 2H, 3H, And 3He Data, S. I. Alekhin, S. A. Kulagin, Roberto Petti

Faculty Publications

We report the results of a new global QCD analysis including deep-inelastic scattering data off 1H, 2H, 3H, and 3He targets. Nuclear corrections are treated in terms of a nuclear convolution approach with off-shell bound nucleons. The off-shell (OS) corrections responsible for the modification of the structure functions (SFs) of bound nucleons are constrained in a global fit along with the proton parton distribution functions (PDFs) and the higher-twist (HT) terms. We investigate the proton-neutron difference for the OS correction and discuss our predictions for the SF ratio F n 2 / F p 2 and …

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Dmsan A Multi-Criteria Decision Analysis Framework And Package To Characterize Contextualized Sustainability Of Sanitation And Resource Recovery Technologies, Hannah A. C. Lohman, Victoria L. Morgan, Yalin Li, Xinyi Zhang, Lewis Stetson Rowles, Sherri M. Cook, Jeremy S. Guest Mar 2023

Dmsan A Multi-Criteria Decision Analysis Framework And Package To Characterize Contextualized Sustainability Of Sanitation And Resource Recovery Technologies, Hannah A. C. Lohman, Victoria L. Morgan, Yalin Li, Xinyi Zhang, Lewis Stetson Rowles, Sherri M. Cook, Jeremy S. Guest

Civil Engineering & Construction: Faculty Publications

In resource-limited settings, conventional sanitation systems often fail to meet their goals─with system failures stemming from a mismatch among community needs, constraints, and deployed technologies. Although decision-making tools exist to help assess the appropriateness of conventional sanitation systems in a specific context, there is a lack of a holistic decision-making framework to guide sanitation research, development, and deployment (RD&D) of technologies. In this study, we introduce DMsan─an open-source multi-criteria decision analysis Python package that enables users to transparently compare sanitation and resource recovery alternatives and characterize the opportunity space for early-stage technologies. Informed by the methodological choices frequently used in …

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Conformational Dynamics And Free Energy Studies Of Dna And Other Biomolecules, Paul B. Orndorff Mar 2023

Conformational Dynamics And Free Energy Studies Of Dna And Other Biomolecules, Paul B. Orndorff

USF Tampa Graduate Theses and Dissertations

This work uses molecular dynamics simulations and enhanced sampling methods to investigate both the qualitative and quantitative properties of biomolecular systems. Conformational dynamics are critical in the study of biomolecular systems. Application of computer simulations to study dynamics of biomolecular systems allows for motions to be readily investigated at a resolution not possible in experimental techniques. In this work, the dynamics of uracil damaged and undamaged DNA is studied via molecular dynamics simulations. Uracil results in DNA from either misincorporation in the replication process or through spontaneous deamination of cytosine, and its presence in DNA can lead to mutations in …

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Neutrosophic Mcdm Methodology For Assessment Risks Of Cyber Security In Power Management, Ahmed M. Abdelmouty, Ahmed Abdel-Monem Mar 2023

Neutrosophic Mcdm Methodology For Assessment Risks Of Cyber Security In Power Management, Ahmed M. Abdelmouty, Ahmed Abdel-Monem

Neutrosophic Systems with Applications

Every day, new reports of cyberattacks on interconnected control systems emerge. The vulnerability of their communication mechanism makes similar control systems a target for malicious outsiders. Protecting sensitive data and maintaining network reliability and availability are two of the main reasons why network security is so important. Strong and dependable network security strategies use a number of safeguards to protect users and businesses from malware and cyber assaults like distributed denial of service. A safety analysis is an essential step that must precede the introduction of any security measures. There hasn't been much experience with cyberattacks on power control systems …

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Core-Periphery Principle Guided Redesign Of Self-Attention In Transformers, Xiaowei Yu, Lu Zhang, Haixing Dai, Yanjun Lyu, Lin Zhao, Zihao Wu, David Liu, Tianming Liu, Daijiang Zhu Mar 2023

Core-Periphery Principle Guided Redesign Of Self-Attention In Transformers, Xiaowei Yu, Lu Zhang, Haixing Dai, Yanjun Lyu, Lin Zhao, Zihao Wu, David Liu, Tianming Liu, Daijiang Zhu

Computer Science Faculty Research & Creative Works

Designing more efficient, reliable, and explainable neural network architectures is critical to studies that are based on artificial intelligence (AI) techniques. Numerous efforts have been devoted to exploring the best structures, or structural signatures, of well-performing artificial neural networks (ANN). Previous studies, by post-hoc analysis, have found that the best-performing ANNs surprisingly resemble biological neural networks (BNN), which indicates that ANNs and BNNs may share some common principles to achieve optimal performance in either machine learning or cognitive/behavior tasks. Inspired by this phenomenon, rather than relying on post-hoc schemes, we proactively instill organizational principles of BNNs to guide the redesign …

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Measurement Of The Double-Differential Muon-Neutrino Charged-Current Inclusive Cross Section In The Nova Near Detector, M. A. Acero, P. Adamson, L. Aliaga, N. Anfimov, A. Antoshkin, E. Arrieta-Diaz, L. Asquith, A. Aurisano, A. Back, M. Baird, N. Balashov, P. Baldi, B. A. Bambah, S. Bashar, K. Bays, B. Behera, R. Bernstein, V. Bhatnagar, D. Bhattarai, B. Bhuyan, Roberto Petti, Et. Al. Mar 2023

Measurement Of The Double-Differential Muon-Neutrino Charged-Current Inclusive Cross Section In The Nova Near Detector, M. A. Acero, P. Adamson, L. Aliaga, N. Anfimov, A. Antoshkin, E. Arrieta-Diaz, L. Asquith, A. Aurisano, A. Back, M. Baird, N. Balashov, P. Baldi, B. A. Bambah, S. Bashar, K. Bays, B. Behera, R. Bernstein, V. Bhatnagar, D. Bhattarai, B. Bhuyan, Roberto Petti, Et. Al.

Faculty Publications

We report cross-section measurements of the final-state muon kinematics for νμ charged-current interactions in the NOvA near detector using an accumulated 8.09×1020 protons on target in the NuMI beam. We present the results as a double-differential cross section in the observed outgoing muon energy and angle, as well as single-differential cross sections in the derived neutrino energy, Eν, and square of the four-momentum transfer, Q2. We compare the results to inclusive cross-section predictions from various neutrino event generators via χ2 calculations using a covariance matrix that accounts for bin-to-bin correlations of systematic uncertainties. …

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Objective Physical Activity And Sleep Characteristics Measurements Using A Triaxial Accelerometer In Eight Year Olds, Susan A. Harrington Mar 2023

Objective Physical Activity And Sleep Characteristics Measurements Using A Triaxial Accelerometer In Eight Year Olds, Susan A. Harrington

Dissertations

Secular trends demonstrate that young children are less active and sleep less. Inequity in an individual's energy balance is known to have poor health outcomes. Academic achievement, academic behavior, and weight status are proxy indicators for health and psychosocial outcomes in this study. Current guidelines in place for sleep and physical activity in childhood are the result of data collected in the form of self-reports. Quantification and qualification of physical activity dimensions and sleep characteristics are essential not only for the purpose of clearly establishing parameters but also for the intent of verifying optimal health outcomes and evaluating interventions related …

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Hörmander’S L2 -Method, ∂-Problem And Polyanalytic Function Theory In One Complex Variable, Daniel Alpay, Fabrizio Colombo, Kamal Diki, Irene Sabadini, Daniele C. Struppa Mar 2023

Hörmander’S L2 -Method, ∂-Problem And Polyanalytic Function Theory In One Complex Variable, Daniel Alpay, Fabrizio Colombo, Kamal Diki, Irene Sabadini, Daniele C. Struppa

Mathematics, Physics, and Computer Science Faculty Articles and Research

In this paper we consider the classical ∂-problem in the case of one complex variable both for analytic and polyanalytic data. We apply the decomposition property of polyanalytic functions in order to construct particular solutions of this problem and obtain new Hörmander type estimates using suitable powers of the Cauchy-Riemann operator. We also compute particular solutions of the ∂-problem for specific polyanalytic data such as the Itô complex Hermite polynomials and polyanalytic Fock kernels.

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Cardiac Arrhythmia Disease Classifier Model Based On A Fuzzy Fusion Approach, Fatma Taher, Hamoud Alshammari, Lobna Osman, Mohamed Elhoseny, Abdulaziz Shehab, Eman Elayat Mar 2023

Cardiac Arrhythmia Disease Classifier Model Based On A Fuzzy Fusion Approach, Fatma Taher, Hamoud Alshammari, Lobna Osman, Mohamed Elhoseny, Abdulaziz Shehab, Eman Elayat

All Works

Cardiac diseases are one of the greatest global health challenges. Due to the high annual mortality rates, cardiac diseases have attracted the attention of numerous researchers in recent years. This article proposes a hybrid fuzzy fusion classification model for cardiac arrhythmia diseases. The fusion model is utilized to optimally select the highest-ranked features generated by a variety of well-known feature-selection algorithms. An ensemble of classifiers is then applied to the fusion’s results. The proposed model classifies the arrhythmia dataset from the University of California, Irvine into normal/abnormal classes as well as 16 classes of arrhythmia. Initially, at the preprocessing steps, …

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Multi-Scale Hybridized Topic Modeling: A Pipeline For Analyzing Unstructured Text Datasets Via Topic Modeling, Keyi Cheng, Stefan Inzer, Adrian Leung, Xiaoxian Shen, Deanna Needell, Todd Presner, Michael Perlmutter, Michael R. Lindstrom, Joyce Chew Mar 2023

Multi-Scale Hybridized Topic Modeling: A Pipeline For Analyzing Unstructured Text Datasets Via Topic Modeling, Keyi Cheng, Stefan Inzer, Adrian Leung, Xiaoxian Shen, Deanna Needell, Todd Presner, Michael Perlmutter, Michael R. Lindstrom, Joyce Chew

School of Mathematical & Statistical Sciences Faculty Publications

We propose a multi-scale hybridized topic modeling method to find hidden topics from transcribed interviews more accurately and more efficiently than traditional topic modeling methods. Our multiscale hybridized topic modeling method (MSHTM) approaches data at different scales and performs topic modeling in a hierarchical way utilizing first a classical method, Nonnegative Matrix Factorization, and then a transformer-based method, BERTopic. It harnesses the strengths of both NMF and BERTopic. Our method can help researchers and the public better extract and interpret the interview information. Additionally, it provides insights for new indexing systems based on the topic level. We then deploy our …

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منظومة ابن سينا الإشراقية وتأثيرها على الفكر اليهودي الوسيط نموذج أبراهام بن عزرا, عبد الرحيم حيمد Mar 2023

منظومة ابن سينا الإشراقية وتأثيرها على الفكر اليهودي الوسيط نموذج أبراهام بن عزرا, عبد الرحيم حيمد

Dirassat

Avicenna had a great influence on Jewish thinkers throughout the Middle Ages. Jewish philosophy drew many of its conceptual constructions from the Avicenna tradition and succeeded in constructing original doctrines by reconciling Jewish tradition, Greek philosophy and its Muslim reception. The article traces the influence of Avicenna's ishraq (Enlightenment) philosophy on medieval Jewish thought. It seeks to clarify the nature of this influence, and to define its paths and repercussions on Jewish scholars and their various philosophical doctrines. This study highlights the extent of this influence through the analysis of philosophical and mystical notions in the work of Abraham Ben …

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Synthesis And Characterization Of New Azo Dyes Derived From Acyclovir And Sulfamethoxazole And Study Their Biological Activity, Abdul Rahman Y. Wahoud, Thanaa Shriteh, Ali Yousef, Mohammad Mazen Kondakji Mar 2023

Synthesis And Characterization Of New Azo Dyes Derived From Acyclovir And Sulfamethoxazole And Study Their Biological Activity, Abdul Rahman Y. Wahoud, Thanaa Shriteh, Ali Yousef, Mohammad Mazen Kondakji

Hadhramout University Journal of Natural & Applied Sciences

In this research, two new azo dyes, 9-(2-Hydroxy-ethoxymethyl)-2-(2-hydroxy5nitrophenylazo)-1,9-dihydro-purin-6-one and 4-(2-Hydroxy-napHthalen-1-ylazo)-N-(5-methyl-isoxazol-3-yl)-benzenesulfonamide, derived from Acyclovir and Sulfamethoxazole was synthesized. The first dye synthesis was started by diazation of acyclovir, then combined with 4-nitrophenol activated with potassium hydroxide 10%, yielding 80%, and its purity was verified by thin layer chromatography (TLC). The second dye synthesis was started by diazation of Sulfamethoxazole then combined with β-naphthol activated with potassium hydroxide 10%, yielding 87%, and its purity was verified by thin layer chromatography (TLC). The identity of the resulting pigments was determined based on spectroscopic methods such as infrared spectroscopy, proton nuclear magnetic resonance spectrum …

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Application Of Pinch Analysis For Energy Saving And Reducing Gas Emissions Based On Mathematical Model In The Hydrocracking Unit, Badiea S. Babaqi Mar 2023

Application Of Pinch Analysis For Energy Saving And Reducing Gas Emissions Based On Mathematical Model In The Hydrocracking Unit, Badiea S. Babaqi

Hadhramout University Journal of Natural & Applied Sciences

Pinch analysis approach of the heat exchanger network in the hydrocracking unit was carried out to save the energy consumption and reduce the gas emissions simultaneously. This method based on mathematical model of the hydrocracking unit for a heat exchanger network using LINGO program to achieve the minimization of environmental impacts and the reduction of energy cost. The presented energy demands for the heat exchanger network are 20.38 MMBtu/hr and 26.52 MMBtu/hr for heating and cooling loads, respectively. The current analysis shows a huge opportunity in order to decrease energy consumption of the hydrocracking process at a minimum temperature difference …

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Synthesis, Characterization, And Cytotoxicity Studies Of A Copper(Ii) Complex With Vanillin 3-Ethyl-Thiosemcarbazone A Ligand, Novia Mann, Ifeoluwa Oyeyemi, Duaa R. Alajroush, Elizabeth A. Tonsel-White, Stephen J. Beebe, Alvin Holder Mar 2023

Synthesis, Characterization, And Cytotoxicity Studies Of A Copper(Ii) Complex With Vanillin 3-Ethyl-Thiosemcarbazone A Ligand, Novia Mann, Ifeoluwa Oyeyemi, Duaa R. Alajroush, Elizabeth A. Tonsel-White, Stephen J. Beebe, Alvin Holder

Undergraduate Research Symposium

Triple-negative breast cancer (TNBC) is one of the most aggressive and challenging breast cancer subtypes to treat, as these cancer cells lack three common receptors: estrogen, progesterone, and human epidermal growth factor receptor 2. The multiple oxidation states transition metals can occupy have made this narrowly explored group popular for anti-cancer research in recent decades. Furthermore, the success of cisplatin, which has platinum as a metal center, while being a cancer-fighting agent with serious side effects, has caused other metal centers to be investigated as possible alternatives as chemotherapeutic drugs. Copper, as a biologically essential metal, makes an attractive candidate …

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Margalefidinium Polykrikoides Cyst Resuspension In The Lafayette River, A Sub-Tributary Of The Chesapeake Bay, Gabrielle Greaney, Eduardo Perez Vega, Katherine Crider, Dreux Chappell, Kimberly Powell, Richard Hale, Peter Bernhardt, Margaret Mulholland Mar 2023

Margalefidinium Polykrikoides Cyst Resuspension In The Lafayette River, A Sub-Tributary Of The Chesapeake Bay, Gabrielle Greaney, Eduardo Perez Vega, Katherine Crider, Dreux Chappell, Kimberly Powell, Richard Hale, Peter Bernhardt, Margaret Mulholland

Undergraduate Research Symposium

Harmful Algal Blooms are a collection of algae in a body of water that can cause serious environmental issues and health problems in both people and aquatic organisms. Dinoflagellates are microscopic, unicellular, and eukaryotic organisms that are well known for forming harmful algal blooms because of eutrophication. Coastal Virginia suffers from HABs in the Chesapeake Bay and its tributaries. A common species of dinoflagellate, known as Margalefidinium polykrikoides exists in the Chesapeake Bay. The purpose of this study is to determine if sediment resuspension produced by wind generated surface gravity waves cause cysts (dinoflagellate resting stages) to be suspended into …

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