Digital Commons Network^™

A Study On Some Distance Based Domination Parameters In Graphs And Their Applications, Shanmugavelan S Mr

Theses and Dissertations

Distance-based domination has emerged as a significant development in graph theory, attributed to its applications in communication systems, interconnection networks, parallel architectures, and chemical graph models. This thesis focuses on two such graph invariants: hop domination number and 2-hop domination number of graphs. The hop domination number of some generalized graph structures like generalized thorn paths, generalized theta graphs, and snake graph families is studied along with a newly introduced family, namely generalized ciliates.

Moreover, a variant of hop domination number, namely, the 2-hop domination number, is studied for some grid families like ladder, hexagonal grid, and its variants. Furthermore, …

Digital Irresponsibility In The Gig Economy: Insights From A Mixed-Methods Study, Catherine Prentice, Nikshit Gautam, Susan Zeidan

All Works

Purpose – Present study examines how corporate digital irresponsibility (CDI) contributes to self-regulatory failure among online food delivery workers. Self-regulatory failure is operationalised through two outcomes, namely burnout and risky driving behaviour. Drawing on psychological contract theory and the job demands-resources framework, the study investigates the mediating role of psychological contract breach and the dual moderating role of technostress. Design/methodology/approach – A sequential explanatory mixed-methods design was employed. Survey data from 342 food delivery workers were analysed using structural equation modelling, followed by semi-structured interviews with 25 workers to contextualise and validate the quantitative patterns. Findings – All three CDI …

Spectator 2026-09-19, Editors Of The Spectator

The Spectator

No abstract provided.

Nightside Electron Precipitation Patterns As Observed By Elfin And Cirbe Cubesats, Kun Zhang, Anton V. Artemyev, Xinlin Li, Xiao-Jia Zhang, Vassilis Angelopoulos, Yang Mei, Zheng Xiang, Niklas Grimmich

Publications

The rapidly expanding fleet of low-altitude CubeSats equipped with energetic particle detectors brings new opportunities for monitoring the dynamics of the radiation belt and near-Earth plasma sheet. Despite their small sizes, CubeSats can carry state-of-the-art instruments that provide electron flux measurements with finer energy resolution and broader energy coverage, compared to conventional missions such as POES satellites. The recently launched CIRBE CubeSat measures 250–6,000 keV electrons with extremely high energy resolution, however, CIRBE typically only measures locally-trapped electrons and cannot directly measure the precipitating electrons. This work aims to develop a technique for identifying indications of nightside precipitation using the …

Designing A Technology-Enhanced Curriculum For Preservice Mathematics Teachers: A Practice-Based Reflection, Alaa Karem Abd-El-Hafez

International Journal of Transformative Teaching and Learning in Higher Education

Preparing preservice secondary mathematics teachers in a post-pandemic, AI-driven digital landscape presents unique pedagogical challenges. As a teacher educator and former secondary mathematics teacher, I aim for preservice candidates to harness technology as a vehicle for high-leverage, evidence-based teaching strategies while prioritizing software accessibility and affordability. This practice-based article details the comprehensive redesign of a technology in mathematics education course structured around five modular units and three project-based assessments. Guided by the Technological Pedagogical Content Knowledge (TPACK) framework, I articulate the rationale for tool selection, instructional design decisions, and assessment strategies. Ultimately, this course model offers higher education programs an …

Class(Room) Culture: New Conceptualization And A Model Of Culture-Aware Teaching, Ravit Heskiau

International Journal of Transformative Teaching and Learning in Higher Education

As higher education becomes increasingly personalized and students’ individual identities are increasingly considered, this article explores the concept of classroom culture as part of assessing, embracing, and shaping each class’s shared characteristics as a collective. I define classroom culture and explain why it is paramount for educators to understand the unique cultures of their classes and actively assess them, striking a balance between supporting classroom culture and shaping it. Following a critical literature review, I demonstrate the application of commonly used cultural frameworks from the organizational culture literature to higher education classes. Specifically, I expand on how they can help …

Use Of Generative Ai Tools In An Undergraduate Engineering Design Course, Wei Yin, Esther Ocharo, Lillian Best, Harrison Martin

International Journal of Transformative Teaching and Learning in Higher Education

Generative AI tools are widely used by college students. This study aimed to investigate the best ways to teach students the limits of AI, especially in hands-on engineering classes. A class project in a sophomore biomedical engineering class was used to test the effectiveness of generative AI tools in supporting engineering CAD design and 3D modeling. Students were tasked with designing a finger basketball toy, creating 2D engineering drawings, and creating a physical prototype using 3D modeling and printing. Students used ChatGPT, Copilot, and Gemini to support the completion of the design project. Students’ manual work demonstrated satisfactory skills in …

Rhythm-Predictive Power Management For Ai Fabric Network Elements, Fernando Calabria, Juan Alcaide, Nebojsa Kosanovic

Defensive Publications Series

A system is proposed herein for rhythm-predictive power management in artificial intelligence (AI) fabric network elements. The system learns the periodicity of AI training workloads from port counters local to a network device, predicts idle and busy windows, and schedules per-port power transitions so a port can enter a reduced-power state during a predicted idle interval and return to full capability before the next burst arrives. The mechanism requires no job, collective, scheduler, or external-controller knowledge. Confidence gating limits predictive action to ports with established periodicity and returns a port to reactive or always-on behavior when prediction confidence falls. By …

Multi-Agent Orchestration Engine For Synchronized Generative Dialogue And Kinematics, Allison Garcia, Corbin Cunningham, Mike Dory

Defensive Publications Series

Creating coordinated interactions for multi-agent systems, such as physical robots or virtual characters, can present challenges in synchronizing expressive dialogue with coherent physical actions and adapting to unscripted events. The disclosed technology describes a multi-agent orchestration engine with a decoupled architecture that can employ a tiered timeline system to manage a global narrative and individual agent states. A dynamic interruption handler can leverage a large language model to reason about real-time inputs and determine if an agent should deviate from a scripted path. The engine can then generate synchronized dialogue and high level behavioral tokens, which may be subsequently translated …

Selective Citation: The Systematic Omission Of Established Regional Literature, İrem Eli̇tez

Turkish Journal of Earth Sciences

No abstract provided.

Integrated Assessment Of Groundwater Quality And Human Health Risks In A Semiarid Region Of Kemaliye (Türkiye), Veli̇ Keski̇n, Celaletti̇n Şi̇mşek

Turkish Journal of Earth Sciences

In this study, the hydrochemical characteristics, drinking water suitability, and potential human health risks of groundwater in the Karapınar region (Kemaliye, Erzincan, Türkiye), which has become a critical drinking water resource due to drought associated with climate change and the depletion of surface water resources, were investigated using an integrated multiparameter approach. Within the scope of the study, a total of 18 water samples, comprising 13 spring water samples and 5 groundwater samples obtained from wells, were collected during the dry season (October 2021) and analyzed for major ions, physicochemical parameters, nitrate, and trace elements. The suitability of the samples …

Raising The Floor: How The Idea And State Civil Rights Law Can Rectify The Systemic Flaws Of Disability Accommodations In Higher Education, Osabohien Oduwa

Public Interest Law Journal

No abstract provided.

Cold Plasma Seed Treating And Plasma-Activated Water: An Innovative, Sustainable Method To Improve Salinity Tolerance And Crop Yields In Sweet Pepper (Capsicum Annuum L.), Sura Muayad Abdul Majeed, Mushtak F. Karomi Kisko

Baghdad Science Journal

This study evaluated the efficacy of cold plasma (CP) and plasma-activated water (PAW) in mitigating salinity stress on sweet pepper. Seeds were exposed to CP for durations of 0, 60, and 180 seconds, then irrigated with saline solutions at 0, 4, and 8 dS/m NaCl, and sprayed with tap water, potassium nitrate, or PAW. Results showed that increased salinity significantly hindered plant growth and fruit yield. i.e. declines were observed in leaf area, shoot dry weight, and productivity, by 18.67%, 19.11%, and 17.56%, respectively, at an 8 dS/m salinity level compared to non-salinity conditions. CP treatment significantly alleviated these adverse …

The Use Of Schanginia Arbuscula Seeds As An Adsorbent For The Removal Of Congo Red And Eosin-Y Dyes, Ali K. Al-Muttairi

Baghdad Science Journal

Water is a crucial element for human prosperity, and maintaining clean and safe water is crucial for survival, and due to the continuous human activities, the water is being drastically polluted. These pollutants require treatment to reduce or remove them, and from the different types of water treatment methods, adsorption is considered a fast, affordable, and easy to apply method. In this study, the ability of Schanginia arbuscula seeds as an adsorbent to remove two dyes, which are congo red (C.R.) dye and eosin Y (E.Y.) dye was tested, at first, the characterization of the adsorbent was studied by using …

Design, Synthesis, And Biological Evaluation Of Novel Heterocyclic Derivatives Incorporating 2-Carboxyindole Core, Aya T. Abdulameer, Sameaa J. Khammas

Baghdad Science Journal

The current research deals with 2-carboxyindole, with emphasizing their biological activities. Indole derivatives that well-known for their wide biological characteristics like anticancer, antiviral, and antibacterial activities, were modified by adding Schiff base and beta-lactam frameworks in order to boost their therapeutics prospective. The compounds have been synthesized in a series of steps, which involved Mannich reactions, aldehyde condensation, as well as beta-lactam formation with chloroacetyl chloride. TLC, FTIR, ¹H-NMR, and ¹³C-NMR spectroscopy have been employed to identify the structural details. Schiff base derivatives containing nitro (-NO₂) as well as chlorine (-Cl) substituents exhibited high antibacterial as …

Mass Transfer Control In Chitosan-Based Hybrid Material Incorporating Pyromellitic Dianhydride And Copper Oxide Nanoparticles: Intraparticle Diffusion And Boyd Model Analysis, Arwa Raad Ibrahim, Basma A. Abdul Majeed, Sanaa A. Al-Sahib

Baghdad Science Journal

The accelerated development of new technologies for treating pollutants has led to the emergence of numerous innovative adsorbents. These materials typically possess promising structural and surface properties suitable for a variety of applications. In the same context, the present study prepared a chitosan-based hybrid material incorporating pyromellitic dianhydride and copper oxide nanoparticles (PMDA-Cts-CuO) under ultrasonic wave conditions. It is a newly synthesized material derived from an organically degradable source for lead removal purposes. Following the confirmation of the material's structural and morphological properties, the current research effort focused on examining the PMDA-Cts-CuO for diffusion kinetic models: the intraparticle diffusion model, …

Levels, Human Exposure And Health Risk Assessment Of Heavy Metals In Indoor And Outdoor Dust From Basra, Iraq, Mohammed A. Al-Hilfi, Layla Salih Al-Omran, Adil A. Al-Fregi

Baghdad Science Journal

This study determined the levels and distribution patterns of Pb, Cd, Co, Cu, Ni, and Zn in indoor (n = 22) and outdoor (n = 22) dust from Basra, Iraq, and evaluated the associated human health risks. The total mean concentration of ∑ ₆HMs was 247 mg/kg in the indoor dust and 285 mg/kg in the outdoor dust. Zn was the dominant metal in both environments, with mean concentrations of 155 and 161 mg/kg, contributing 63% and 56% of the total metal burden, respectively. Pb, Cd, Co, and Ni concentrations were significantly higher (p < 0.05) in outdoor dust, indicating the influence of outdoor emission sources. Human exposure assessment showed that the average daily doses (ADD) for children through ingestion, inhalation, and dermal contact were approximately 9.3-fold higher than those for adults across all metals. Zn exposure reached 1.99 × 10^-3 and 2.13 × …

Structural And Hamiltonian Properties Of The N–Array Unit Graphs Over Finite Rings, Puguh Wahyu Prasetyo, Muhammad Ardiyansyah, Joe Repka

Baghdad Science Journal

Consider a finite ring R, and let U( R ) denote the set of all its unit elements. The unit graph G_R of R is defined as follows: the vertex set V( G_R ) consists of all elements of R. Two distinct elements a,\ b∈ \ G_R are adjacent if and only if a + b∈ U( R ). Recent research has provided necessary and sufficient conditions for the unit graph G_R to have a Hamiltonian cycle. However, the property of Hamiltonicity under direct product constructions of rings has not been fully understood. This paper addresses this gap by studying …

Surface Wave Propagation At The Interface Between An Inviscid Liquid Layer And A Rotating Micropolar Elastic Solid With Stretch, Somaiah Kamidi, Narsimharao Kandula, Venkateswara Rao Burugu, Gaddam Rajkumar, Srinivas Remidi

Baghdad Science Journal

This article investigates the impact of angular rotation on surface-wave propagation at the interface between an inviscid liquid layer and a rotating micropolar elastic solid with stretch. The surface-wave secular equation is obtained analytically using the plane-harmonic solution method after the mathematical model has been developed. It is noticed that for symmetric modes of surface waves, the liquid effects and the micro-stretch do not manifest simultaneously. Using MATLAB software, the impacts of the solid's angular rotation and the liquid layer's thickness on the symmetric mode of surface waves are illustrated for a specific model. The velocity of surface waves at …

Protocol For Integrating Vessel Networks And Environmental Matching To Inform Cost-Effective Archipelago Biosecurity Planning And Management, Chi T.U. Le, Chad L. Hewitt, Marnie L. Campbell

Research outputs 2022 to 2026

Inter-island vessel networks support economic activity but also enable secondary spread of non-native species. By integrating vessel-movement data, network analysis, and environmental matching, we present a protocol for generating a cost-effective biosecurity decision-support tool by assessing both the relative economic importance and the relative risks of species spread within a vessel traffic system. We outline steps for data curation, network construction, and sea surface temperature-based environmental similarity calculation. We then detail procedures for the translation of outputs into management recommendations. For complete details on the use and execution of this protocol, please refer to Campbell et al. ¹

Signals In The Ionosphere Ahead Of Tsunami Arrival, Svetlana Riabova, Sergey Shalimov

Turkish Journal of Earth Sciences

We consider the impact of the tsunami propagating after the earthquake in Tohoku on the ionosphere according to measurements from the Hawaiian Islands, i.e., at a fairly large distance from the epicenter of the earthquake. These measurements, taken at a tidal tsunami monitoring station, at a magnetometric station, and by GPS, were used to record the arrival of the tsunami. We experimentally establish that the arrival of atmospheric waves generated by the tsunami significantly advanced the arrival of sea waves at the observation point, and this advance from one source was recorded in both the lower and upper ionosphere. Attention …

Editorial Note To The Article “Identification Of A Previously Unrecognized Listric Fault Beneath The Acıpayam Graben: Insights From Integrated Dinsar And Field Observations” [Turkish Journal Of Earth Sciences 35 (1) 2026 20-41], Orhan Tatar

Turkish Journal of Earth Sciences

No abstract provided.

Re: Approval Letter For The Butte Priority Soils Operable Unit Draft Final 2023 Insufficiently Reclaimed Sites Sampling: Bres No. 93 – Soudan Dump Site Evaluation Summary Report, Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Butte Priority Soils Operable Unit Final Butte Priority Soils Operable Unit Unreclaimed Sites Field Sampling And Investigation Plan: Ur-53 – South Of Surprise Dump, Mike Mcanulty

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Clark Tailings Consolidated Waste Management Area (Ctcwma) Site Investigation Quality Assurance Project Plan (Qapp) Revision 0 (2026) Request For Change (Rfc)-2026-001 (Dated September 8, 2026), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 68 – Little Mina-2, Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 57 – Little Mina-1, Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Draft Final Reclamation Improvement Field Sampling And Investigation Plan: Bres No. 9 – Clark Street Dump, Molly Roby

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

A Quad-Port Dual-Band Elliptical Patch Mimo Antenna For 5g And Wlan Applications, Livingstone L. Kimaro, Hashimu Uledi Iddi, Mussa M. Kissaka, Neema S. Joseph

Tanzania Journal of Engineering and Technology (TJET)

A dual-band multiple-input multiple-output (MIMO) antenna for wireless local area network (WLAN) and fifth-generation new radio (5G NR) band n104 applications is presented. Two U-shaped slots interconnected back to back are etched on an elliptical shaped patch, four identical patch elements are then arranged orthogonally to form a quad-port antenna that resonates at 5.8 GHz and 6.7 GHz. Without additional extrinsic decoupling structures, the proposed design achieves measured isolation levels above 25.13 dB and 21.31dB, realized gains of 7 dBi and 7.2 dBi and -10 dB impedance bandwidths of 155.4 MHz and 90 MHz in the lower and upper frequency …

Design Of Permanent Magnet Synchronous Motor For Railways Traction Application, Anna S. Mwang'onda, Jackson J. Justo, Francis Mwasilu

Tanzania Journal of Engineering and Technology (TJET)

This paper presents the design of surface mounted permanent magnet synchronous motor (SMPMSM) intended for traction applications in standard gauge railway (SGR) for passengers. The proposed motor is rated 350 kW with a base speed of 3000 rpm. Moreover, speed control strategy with stability analysis is incorporated in the design to validate the performance of the SPMSM. The simulation results achieved a torque of approximately 1115 Nm at a terminal voltage of 800 V. The flux linkage of 150 mVs which ensures effective electromagnetic pertinence while maintaining safe magnetic loading because the flux density is less than 1.5 T. The …