Digital Commons Network^™

Utilization Of Pensi Shell Waste As Hydroxyapatite Composite With Biopolymer From Shrimp Shell And Peg And Its Application, Novesar Jamarun, Nabiila Ayyu Trycahyani, Upita Septiani, Vivi Sisca, Muhammad Refki Novesar, Sri Mulya

Baghdad Science Journal

This study focuses on the synthesis, structural analysis and antibacterial properties of a composite comprising hydroxyapatite (HAp), polyethylene glycol (PEG) and chitosan (CTS). CTS was extracted from shrimp shells, and CaO for Hap was obtained from pensi shell. These composites were synthesized using the sol-gel method in situ by varying the concentrations of PEG (5, 10, 15, 20 and 25%) and CTS (1, 2, 3, 4, and 5%). The synthesized composites were characterized using FTIR, XRD, SEM-EDX, and TGA-DTA analyses, and their antimicrobial activities were also evaluated. The HAp-PEG-Chitosan composite with 5% chitosan and 10% PEG was identified as the …

Insertion Of Noble Metal Free Cathodic Catalyst Layer With Fe-N-C Catalyst For Boosted Performance Of Pemfc, Shi Zhou, Muhammad Tariq, Asif Nadeem Tabish, Muhammad Salman, Fan-Di Ning, Muhammad Rayyan Tayyab, Ran-Ran Peng, Meng-Geng Hao, Wen-Mu Li, Xiao-Chun Zhou

Journal of Electrochemistry

Economical Fe-N-C catalysts are considered as promising alternatives to platinum group metal catalysts for proton exchange membrane fuel cells (PEMFCs). Despite exhibiting robust activity on rotating disk electrodes, their performance within membrane electrode assemblies often experiences limitations, such as decreased O₂ diffusion, high H₂O₂ formation, low proton conduction, and a lower electron transfer number. In this study, key factors, including proton transport, electron conduction, and gas diffusion within air-breathing PEMFCs, have been investigated by adjusting cathode catalyst layer (CCL) compositions. From the experimental results, the optimal peak power density was obtained when the loading of Fe-N-C …

Key Issues For Speed Safety Cameras: Results From A Semi-Structured Interview Of Agencies In The United States, Sophia Semensky, Miguel Figliozzi

Civil and Environmental Engineering Faculty Publications and Presentations

Speed safety cameras (SSCs) are a recognized countermeasure for targeting speeding-related crashes, injuries, and fatalities. SSCs have been introduced in various cities and are steadily expanding in use both in the U.S. and internationally. The extensive literature review of domestic and international documents and research papers reveals that the U.S. has been comparatively slow to adopt SSCs, with some other countries implementing these systems more extensively and earlier. Many local agencies are eager to learn SSC best practices and implementation lessons within the U.S. context. In this research, key issues related to SSC implementation are explored through semi-structured interviews with …

What Is That Mysterious Cylinder On Campus? Get To Know Unh's Thermal Energy Storage Tank, Keith Testa

UNH Today Archive

No abstract provided.

Exploring The Perspectives Of Nurse Leaders On Motivational Interviewing For Workplace Well-Being, Quinais S. Yu

Creating Healthy Work Environments (CHWE)

Background: Nurse leaders face challenges in supporting staff well-being while managing their own, and effective communication is crucial.

Aim: This study explored nurse leaders' perceptions of factors influencing well-being, challenges they face, the impact of Motivational Interviewing skills, and their training needs in MI.

Methodology: Employing a qualitative, exploratory design, the study gathered insights from nurse leaders in Hong Kong clinical settings through individual semi-structured interviews, analyzed using thematic analysis.

Key Findings: Nurse leaders perceive MI as a valuable tool for effective communication and addressing staff ambivalence towards self-care. They emphasized the need for improved work environments, work-life balance, career …

Final Project Report Ai Based Heart Diagnosis System Using Ecg, Kiana Austin, Angello Martinez, John Wright, Noelle Poquiz

Engineering Senior Design Reports

Cardiac diseases are one of the leading causes of death across the world, and early detection heavily impacts the patient’s outcomes. This project focuses on developing an AI-based system capable of accurately classifying heart conditions from electrocardiogram (ECG) signals. The team designed a system that processes ECG data and identifies nine distinct cardiac conditions using different machine learning techniques to address these issues. The system is designed to be reliable, scalable, and accessible, to people in environments with limited access to medical professionals.

The system architecture consists of ECG data extraction from WFDB records, preprocessing and standardization, dataset organization and …

Academic Senate - Minutes, 04/28/2026, Academic Senate

Academic Senate Minutes

No abstract provided.

The Use Of Cognitive Biases In Russian Cyber Operations, Emma Manning

Honors Theses

This thesis examines how Russia has employed reflexive control through cyber operations to influence decision-making in foreign states, focusing on disinformation campaigns during the 2014 annexation of Crimea and the 2016 U.S. presidential election. Reflexive control, a concept rooted in Russian military doctrine, seeks to shape an adversary's perceptions and decision-making by providing carefully crafted information that leads targets to make choices favorable to the initiator. This research argues that while the fundamental objectives of reflexive control have remained consistent, technological advances have significantly expanded Russia's ability to conduct operations in developing cyber domains.

Using qualitative analysis of open-source intelligence, …

Executive Summary: Executive Leadership System Improvement Improving Depression Screening And Follow Up Processes, Rebecca Geneiveve Hidalgo Salomon

Walden Dissertations and Doctoral Studies

Depression remains a significant public health burden in the United States, contributing to disability, healthcare utilization, and economic cost. Internal 2024 audits at the project site identified variability in Patient Health Questionnaire 9 PHQ 9 screening and follow up processes, with 68% of screenings completed, 55% of follow ups timely, and disparities among patients with limited English proficiency. These findings indicate a systems level reliability and equity gap. This executive leadership system improvement project focused on developing a standardized, nurse led, electronic health record supported workflow to improve PHQ 9 completion and timely follow up. The practice focused question asked …

Quantifying Evapotranspiration From The Wetlands In The Peripheral Area Between The Most Downstream Stream Gages And The Open Water Body Of The Great Salt Lake, Motasem S. Abualqumboz, David G. Tarboton

Publications

Study region: The eastern peripheral area between the most downstream stream gages and the open water body of the Great Salt Lake (GSL), located in northern Utah within the semiarid western United States (US). 

Study focus: As GSL levels decline, the eastern peripheral area is expanding, exposing former lakebed, much of which has transitioned into natural and managed wetlands. Evapotranspiration (ET) from these wetlands consumes water that would otherwise reach the open-water lake body, yet these losses remain poorly quantified and directly affect the GSL water balance. This study compares a water-balance-based ET estimate for the wetlands in the peripheral …

The Importance Of Play-Based Learning, Nina Cavanaugh

Masters Projects

Play-based learning is a beneficial tool that can help support development of not only young children but students of all ages and abilities. While research may show that play-based learning has benefits for students’ development, many schools in the United States, including public schools in Macomb County do not have professional development opportunities to educate teachers on play-based learning. This project covers the benefits, theories, and implementation strategies of play-based learning. It explains how play-based learning can be beneficial for students cognitive and academic skills.  It also supports social emotional development, physical development, and language development. Not only does play-based …

Isolation And Identification Of Airborne Bacteria Within The University Of Baghdad Campus, Iraq By Using 16s Rrna Gene Technique, Shahad Emad Muheisen, Israa Mohsin Jasim, Fouad K. Mashee Al-Ramahi

Baghdad Science Journal

This study aimed to identify and classify airborne bacteria in outdoor air within the campus of the University of Baghdad, Iraq, using the passive sampling technique. Air samples were collected from ten sites and analyzed by the 16S rRNA gene sequencing technique. The results revealed significant seasonal differences in both microbial and particulate matter concentrations. Bacterial concentrations were considerably higher during the wet season, with 3238.6 CFU/m³ compared to the dry season, with 1872.6 CFU/m³. PM2.5 levels averaged 47.58 μg/m³ in the wet season and declined to 11.33 μg/m³ in the dry season, while PM10 …

Influence Of Web Thickness And Concrete Cover On The Fire Resistance Of Aashto Type Iv Prestressed Concrete Bridge Girders, Fnu Nidhi

Electronic Theses and Dissertations 2020 - Present

Bridge fires caused by vehicle accidents, fuel tanker explosions and storage of combustible material beneath highway structures have led to severe structural damage and catastrophic collapse of prestressed concrete bridges. Critical structural collapse due to fire incidents such as I-85 prestressed concrete bridge girder collapse in Atlanta, 2017 and I-95 steel plate girder bridge partial collapse in Philadelphia, 2023 demonstrated the vulnerability of girders when exposed to extreme hydrocarbon fire temperatures exceeding 1000°C within few minutes. These events highlight the urgent need to better understand the thermal and structural behavior of bridge girders and explore design modifications that can enhance …

On Time-Series Analysis By Structured Matrix Decompositions With Applications To Signal Direction-Of-Arrival Estimation, Georgios Ierotheos Orfanidis

Electronic Theses and Dissertations 2020 - Present

Modern autonomous systems operating in highly dynamic, non-stationary environments require reliable inference from short, potentially corrupted time-series measurements, where conventional statistical methods relying on large-sample support and stationarity assumptions become fundamentally inapplicable. This dissertation develops a unified, model-free theoretical framework for time-series analysis, with a particular application to signal Direction-of-Arrival (DoA) estimation, grounded in structured matrix decompositions under both the L2-norm and L1-norm formulations.

We first approach the problem from a conventional viewpoint by carrying out standard matrix analysis directly on Hankel-structured representations of time-series data. In this context, we demonstrate that L1-norm decompositions of Hankel matrices offer strong resistance …

Molecular Catalysts For Electrochemical Nitrogen Activation Toward Sustainable Ammonia Synthesis, Jin-Xiu Han, Hao Xue, Xian-Biao Fu

Journal of Electrochemistry

Homogeneous electrocatalytic nitrogen reduction reaction (NRR) provides a powerful framework to interrogate molecular nitrogen-fixation pathways under mild conditions. By tuning the metal center, ligand architecture, and reaction medium, these systems enable capturing key intermediates and delivering mechanistic insight at the molecular-level resolution. Nevertheless, advances remain constrained by highly reduced operating potentials, intense competition from the hydrogen evolution reaction (HER), limited durability in turnover, and inadequate long-term stability.

In this review, we take electron delivery to the molecular active site as the guiding principle for organizing homogeneous electrochemical N₂ activation and transformation. We classify reported systems into direct electron transfer …

Water-Driven Solid Electrolyte Interphase Governs Continuous-Flow Ammonia Electrosynthesis, Peng-Bo Liu, Sheng-Liang Zhai, Ji Huang, Zhong-Shuo Zhang, Jie Zeng, Shao-Feng Li

Journal of Electrochemistry

Flow-cell architectures have emerged as a powerful platform for continuous and stable lithium-mediated nitrogen reduction (Li-NRR), enabling ambient-condition electrochemical ammonia synthesis and offering a promising alternative to Haber-Bosch processes. However, Li-NRR is exceptionally sensitive to trace water, and even minor variations in water content can profoundly alter interfacial chemistry. Here, we systematically investigate how initial water concentration affects Li-NRR performance in a continuous-flow cell. Excess water drives the formation of a thick solid electrolyte interphase (SEI) layer, which may impede nitrogen access to metallic lithium and hinder lithium-ion transport. As a result, the ammonia Faradaic efficiency collapses from ~61% to …

Electrospun Pan-Derived Carbon Nanofibers Embedded With Nicofew-Based High-Entropy Oxides For Electrocatalytic Oxygen Evolution Reaction, Alireza Noroozi, Mahdavi, M. Baris Yagci, Mohammad Mahdi A. Shirazi, Saeed Bazgir, Hadi Jahangiri, Uğur Ünal

Research outputs 2022 to 2026

High-entropy oxides composed of Ni, Co, Fe, W, and a fifth transition element (Mo, Mn, or Cu) were integrated into electrospun polyacrylonitrile nanofibers to form porous nitrogen-doped carbon membranes for the oxygen evolution reaction. Gas-assisted electrospinning enabled uniform dispersion of high-entropy oxide nanoparticles within the polyacrylonitrile matrix, while calcination at 800°C produced conductive carbon frameworks embedding crystalline high-entropy oxides with homogeneous elemental distribution. Structural and surface analyses confirmed the preservation of high-entropy oxide phases, catalytic graphitization of the carbon matrix, and strong interfacial bonding between metal oxides and carbon. Among all compositions, Mo-HEO@NC exhibited the lowest overpotential (≈240 mV at …

Information Security Strategies To Thwart Cybersecurity Attacks In The Financial Services Industry, Donovan Anthony Miles

Walden Dissertations and Doctoral Studies

Financial markets and industries are vulnerable to ransomware attacks. Information technology (IT) security subject matter experts (SMEs) are concerned about ransomware cyberattacks on critical infrastructure that threaten their customers’ financial privacy and the institution’s reputation, causing severe financial losses and diminishing productivity. Grounded in the diffusion of innovation theory, the purpose of this qualitative pragmatic inquiry was to explore strategies IT security SMEs use to increase the implementation of existing solutions to thwart cybersecurity attacks in the financial services sector. The participants were six IT security SMEs in the financial industry in the Northeast United States who were responsible for …

Utilization Of Natural Pumice Stone As A Low-Cost Ion Exchanger For Lead (Pb(Ii)) Removal: A Kinetics, Isotherms And Mechanisms Studies, Ahmad Sulaiman

Baghdad Science Journal

Pumice is one of the raw materials that is widely available, especially in the ``Middle East region and Turkey''. In this research, an ion exchanger was prepared from Syrian pumice by converting it into a low-silica ion exchanger (P_Na) for the removal of Pb²__MATH₀__⁺ uptake was 4.3 mmol/g (308.15 K). Removal efficiency was 100% at low concentrations and >80% at medium/high concentrations. The adsorption kinetics followed a pseudo-first-order model, and the equilibrium data fit well to Langmuir, Freundlich, and Redlich-Peterson isotherms (R² > 0.99).

Theoretical Study Of Electronic Properties Of Functionalized Monolayers: Cu, Ag, Au, And Pt Atomic Wires On Graphene, H-Bn Monolayer, Silicene, And Phosphorene, Mythreyee T. Aasuri, Mukesh K. Choudhary, Narender Kumar, Ravindra Pandey

Michigan Tech Publications

The structural and electronic properties of graphene, h-BN monolayer, silicene, and phosphorene monolayers functionalized with Cu, Ag, Au, and Pt atomic wires were investigated using van der Waals─corrected density functional theory. These atomic wires form stable, functionalized monolayers that exhibit physisorption on planar monolayers and chemisorption on nonplanar ones. This results in either linear or bent configurations of the atomic wires, depending on the interface strength, leading to distinct electronic states. A weaker interface induces metal-induced gap states near the Fermi level, whereas a stronger interface results in covalently hybridized states farther from the Fermi level. Analysis of the electron …

Histological Analysis Of Six Atlantic Scleractinian Coral Species Exposed To Three Hydrocarbons, 1-Methylnapthalene, Phenanthrene, And Toluene, Jalyn R. Lee

All HCAS Student Capstones, Theses, and Dissertations

Coral reefs are biologically diverse marine ecosystems that provide numerous goods and ecosystem services. These sessile organisms are vulnerable to anthropogenic impacts, habitat degradation, climate change, and pollution, particularly Petroleum hydrocarbon contamination. Previous research has characterized coral species' sensitivity to hydrocarbons, using a continuous passive dosing system, but the specific histological impacts of petroleum hydrocarbons remain underexplored. This study investigates the histological effects of three petroleum hydrocarbons, 1-methylnaphthalene, phenanthrene, and toluene, on six Atlantic scleractinian coral species: Acropora cervicornis, Porites astreoides, Porites divaricata, Solenastrea bournoni, Stephanocoenia intersepta, and Siderastrea siderea. Coral fragments were exposed to species-specific hydrocarbon concentrations, and …

Forget-Me-Not: Facilitating Social Vibrancy In Spaces Designed For Alzheimer's Disease, Torilyn Mossner

Honors Theses

The objective of this capstone project is to create a foundation for vibrant community interactions and connections that support those living with Alzheimer’s disease, their loved ones, and the broader members of the community through interior design. This work is relevant because Alzheimer’s disease affects 1 in 9 people over the age of sixty-five worldwide. Without a cure, as people continue to age, there is going to be a constant need for development of care. Additionally, design should go a step further than healthy living and begin to prioritize creating a vibrant life and community integration for those living with …

Priority Research Questions To Generate Decision-Grade Data To Enable Coastal Ecosystems To Mitigate The Climate And Nutrient Crises, Gordon J. Watson, John Aldridge, Louise Anderson, Martin J. Attrill, William E.N. Austin, Keisha D. Bahr, Nicola Beaumont, Stefanie Broszeit, Annette Burden, Estela Delgado-Gargiulo, Evangelia G. Drakou, Mike Elliott, Karen Filbee-Dexter, Robinson W. Fulweiler, Angus Garbutt, Boze Hancock, Joerg D. Hardege, Joanna Harley, Ian W. Hendy, Jenny R. Hillman, Tim D. Jickells, Ana I. Lillebø, Mariana D.A.C. Lima, Peter I. Macreadie, Paulina Martinetto, Jackie Mellan, Alf Norkko, Ruth Parker, Michael P. Perring, Bernadette Pogoda

School of Biological and Marine Sciences

Nature-Based Solutions, green-finance instruments and policies are now routinely constructed around carbon sequestration/storage (CSS) and nutrient bioremediation (NB). This integration builds on how Market-Based Instruments (e.g. payments-for-ecosystem-services) are regularly used in policies focused on terrestrial ecosystems. In marine and coastal systems poor understanding of CSS/NB biophysical processes and impacts of ecosystem quality/stressors, combined with methods and governance framework knowledge gaps, generate substantial uncertainty in outcomes. Reductions in output confidence preclude integration into Nature-Based Solutions, stifling market-based investment centred on conserving and restoring temperate coastal ecosystems. To navigate this complex, rapidly evolving area, researchers from six continents engaged in a Priority …

Urgensi Keberadaan Hukum Antariksa Dalam Sistem Hukum Indonesia Dan Tantangan Pengembangannya, Anjar Supriadhie

Jurnal Hukum & Pembangunan

Abstract

Menyambut Berlakunya Uu No. 5 Tahun 1999: Beberapa Harapan Dalam Penerapannya Oleh Komisi Pengawas Persaingan Usaha, Hikmahanto Juwana

Jurnal Hukum & Pembangunan

Abstract

A Comparative Study Of Tin Electrorefining In Molten Licl–Kcl–Cacl₂: Experimental Two-Electrode Current Control And Theoretical Three-Electrode Potential Control, Bryant Johnson, George Ankrah, Ander Fuller, Devin Rappleye

Reviews, Analyses, and Instructional Studies in Electrochemistry (RAISE)

Molten salt electrorefining is a mature technology for metal recovery, yet conventional current‑controlled, two‑electrode operation provides limited electrochemical selectivity and restricted insight into electrode‑specific behavior. In this work, a simplified model is developed to compare current‑controlled two‑electrode electrorefining data with a potential‑controlled three‑electrode electrorefining simulation using tin in molten LiCl–KCl–CaCl₂ as a surrogate for plutonium processing. The model examines anodic and cathodic limitations under fixed‑potential operation and evaluates implications for selectivity, efficiency, and runtime relative to experimentally demonstrated two‑electrode performance. Results indicate that independent potential control enables operation closer to thermodynamic selectivity limits, with the potential to suppress impurity oxidation …

Assessing Awareness, Understanding And Adoption Of Smart Buildings In Algeria: From Architects’ Perspectives, Asma Aribi, Karima Anouche

Iraqi Journal of Architecture and Planning

In recent years, smart buildings have been revolutionizing the construction industry through their potential to enhance energy efficiency, improve occupant comfort and safety, and promote sustainability in the built environment. Nevertheless, despite growing adoption in developed countries, implementation in developing nations, particularly Algeria, remains limited. A major barrier is the lack of awareness among architects regarding the benefits and technical aspects of these systems. This study aims to evaluate Algerian architects’ awareness and understanding of smart buildings. A mixed-methods approach was applied, beginning with a literature review to establish the theoretical framework, followed by a quantitative survey involving 134 practicing …

Study Of The Durability Of Mozabite Vernacular Architecture In Its Current State Through The Principle Of Contextualisation: Case Study Of The Beni-Isguen Ksar, Ghardaïa, Algeria, Samia Ouaal, Karima Anouche

Iraqi Journal of Architecture and Planning

The study aims to assess how current Mozabite vernacular houses fit into their spatio-temporal context, focusing on the Beni-Isguen ksar in Ghardaïa, Algeria. Recognized as a UNESCO World Heritage Site, Mozabite architecture once embodied ecological and sustainable housing, perfectly adapted to its environment. However, transformations intended to ensure durability have raised questions about contextualization, a core principle in sustainable development. Using a multi-method approach—comprising fieldwork, interviews, photographs, and observations of architecture and lifestyle—the study examined contextualization through a multidimensional grid that encompassed physical, environmental, social, cultural, economic, and historical aspects. Results indicate that while these dwellings preserve strong physical, cultural, …

The Role Of Functional Diversity In Urban Synergy For Placemaking In Urban Centers, Noor Hassan Khudhir, Sally Fakhry Khalaf

Iraqi Journal of Architecture and Planning

Achieving urban synergy within the urban fabric is essential for building vibrant and efficient cities. Through its functional and spatial dimensions, urban synergy enhances the dynamism of urban centers and strengthens placemaking—the process of transforming ordinary spaces into lively, human-centered environments that integrate functional, social, and spatial needs. The concept of urban synergy emerged as a response to rapid urbanization, which has eroded the identity and functionality of many city centers. Understanding the relationship between urban synergy and placemaking is therefore crucial for developing integrated urban environments. This study examines how functional diversity within the urban structure influences urban synergy …

Socio-Spatial Interactions And Place Attachment: Towards Sustaining Traditional Shopping Areas, Ibrahim Abdallah Shinbira

Iraqi Journal of Architecture and Planning

This research examines how behavioral tendencies contribute to a sense of attachment to place in the historic shopping district of Misurata City, Libya. With urban growth transforming Misurata, preserving a deep connection to traditional zones presents a challenge. This study aims to identify elements that impact place attachment and suggests methods for improving urban environments. The research uses a qualitative methodology, integrating semi-structured interviews with 22 lifelong residents alongside systematic field observations to study behavioral tendencies, spatial interactions, and sociocultural factors. Major findings reveal that enhancing walkability and infrastructure, confronting cultural practices that create user separation, and safeguarding historic features …