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Experimental Analysis Of Diesel Engine Combustion Chamber Performance Using Field Measurements At The State Company For Heavy Engineering Equipment, Mohammed Kanaan Sedeeq

Al-Esraa University College Journal for Engineering Sciences

The current paper provides a detailed experiment and numerical study of the performance of the combustion chamber of a heavy-duty diesel engine in the common Iraqi industrial conditions at the State Company of Heavy Engineering Equipment (HEESCO). The main goal is to close the difference between what is specified by the manufacturers concerning the performance data, which is usually assumed to be under ideal conditions of the ISO standard, and the real efficiency of operation as witnessed in the field. The methodology is based on a hybrid approach that combines direct field measurements of in-cylinder pressure, temperature and fuel flow …

Optimization Of Bearing Design In Centrifugal Pumps Using Finite Element And Experimental Methods: Application At South Refineries Company, Basra, Mohammed Hasab Naser Al-Mtasher

Al-Esraa University College Journal for Engineering Sciences

In the study, nonlinear vibration and thermo-mechanical characteristics of centrifugal pump bearings utilized in the cooling tower system of South Refineries Company (Basra) were properly examined using a combined experimental and numerical method. The intent of the study was to learn the impact of misalignment, the nature of the lubrication film, and thermal gradients on the stability of the operation of these bearings and their service life under realistic industry environment conditions. Finite element model (FEM) was constructed and tested on the basis of real field data obtained at the working pumps that allowed realistic distribution of stress and temperature. …

Students’ Writing Mindset And Grit: Influences Of Nationality, Academic Track, And Gender, John George Pastor, Ma. Joahna Mante-Estacio

Journal of English and Applied Linguistics

Senior high school (SHS) students in the Philippines are required to produce various academic papers that adhere to the properties of well-written texts. However, studies found that SHS students encounter difficulties with writing across a variety of content and ideas, vocabulary, diction, sentence and paragraph structures, language usage, and referencing (Pablo et al., 2018; Urbano et al., 2021). Despite these concerns, they are expected to persevere and show interest in improving their writing skills. In this context, this quantitative-descriptive study aimed to analyze the potential influences of sociocultural factors on the writing mindset and grit of the SHS students in …

Online Translation Revisited: An Embedded Linguistic Resource In Emi?, Michael Groves, Lisha Yu

Journal of English and Applied Linguistics

It has now been over 10 years since the implementation of neural network-based online translation, allowing students to use English as a medium of instruction (EMI) context free and ubiquitous access to high-quality automated translation. In this time, the quality and ubiquity of the technology have increased dramatically. However, there has been little investigation into EMI students’ perceptions of this development. This study reports the outcomes of discussions with approximately 15 students in a focus group format at a Hong Kong Liberal Arts University, where students whose first language is not English discussed their use of online translation in their …

Us Race/Ethnic Disparities In Diabetes Technologies: A Systematic Review And Meta-Analysis Of 950 000 Individuals, Maria L. M. Rego, Maxim Barnett, Maria Helena Siqueira Tavares De Melo, Ana Rivadeneira

Einstein Health Papers

PURPOSE: To provide a descriptive summary and to quantitatively examine racial and ethnic disparities in the use of continuous glucose monitoring (CGM) and continuous subcutaneous insulin infusion (CSII) among people living with diabetes in the United States.

RESEARCH DESIGN AND METHODS: We followed the Cochrane and PRISMA guidelines (PROSPERO: CRD420251124678). Search was conducted on PubMed, Embase, and Cochrane up to August 2025. Observational studies were included if they (1) were conducted in the United States, (2) evaluated the use of CGM/CSII across different races/ethnic groups, and (3) reported odds ratios (ORs) for between-group comparisons. Three-level random-effect meta-analyses examined OR in …

Russian Language In An Interdisciplinary Setting: A Case Study, Foreign Area Studies At The United States Naval Academy, Joan Chevalier

Russian Language Journal

Russian language enrollments have been dropping in recent years at colleges and universities in the United States. In contrast to this national trend, the number of students studying Russian language at the United States Naval Academy (USNA) has remained robust over the past decade and is poised to increase in the near future as a relatively new interdisciplinary major, Foreign Area Studies (FAS), is expanded and revised. This paper traces recent developments at USNA that have led to the development and expansion of Foreign Area Studies, integrating language study into an interdisciplinary curriculum featuring courses related to nations and cultures …

Russian For The Professions: Creating An M.A. Program In The Context Of Holistic Foreign Language Instruction, Angela Brintlinger, Andrei Cretu, Helen Myers, Emma Pratt, Larysa Stepanova

Russian Language Journal

This paper presents the design, implementation, and some preliminary outcomes of measures aiming at integrating career readiness into the Russian language program at Ohio State University through the creation of a “Russian for the Professions” (RFP) stand-alone M.A. degree. While the M.A. program is still relatively small, its courses serve a larger contingent of students who have achieved or aspire to higher language competency. The key component of the program comprises courses offering specialized language skills in business, cybersecurity, government and foreign affairs, information services, media, and translation. Career-focused curricular offerings are supplemented by programming offered in partnership with industry …

Coastal Landforms Analysis Of Al-Kharrar Lagoon And Rabigh Coast Using Aster (Ast_L1t) Imagery, Western Saudi Arabia, Omar A. Alharbi

Journal of King Abdulaziz University: Marine Science

The current study sought to examine the coastal geomorphology throughout the entire length of the Al-Kharrar Lagoon, in addition to the coastal region of Rabigh City, situated on the western coast of Saudi Arabia. The mechanisms underlying the formation of the wide variety of natural land features were also studied. These include sandy, pebble and rocky beaches and sand dunes; intertidal areas; salt flats (sabkhas) and marshes; elevated, terraced or fringing coral reefs; water inlets; and the deposition of terrigenous or alluvial materials, all reflecting the swift transformation that has impacted the region. Evaluation of the ASTER (AST_L1T) data enabled …

Coastal Flood Risk In New Hampshire: The Latest Science (2025), Lisa Wise, Hannah Volk, Kirsten Howard

UNH Cooperative Extension

This document provides a two-page summary of the NH Coastal Flood Risk Summary, Part I: Science report, which was updated in 2025.

Riesgo De Inundaciones Costeras En New Hampshire: La Ciencia Más Reciente (2025), Lisa Wise, Hannah Volk, Kirsten Howard

UNH Cooperative Extension

Este documento resume el informe "Resumen del Riesgo de Inundaciones Costeras de NH, Parte I: Ciencia," actualizado en 2025.

Effect Of Earnings Ratio And Capital Structure On Share Price: The Moderating Role Of Free Cash Flow In The Industrial Sector, Shakhawan Saeed Sangawi, Chnar Abdullah Rashid, Kaiwan Hasan Salih

Journal of Economics and Administrative Sciences

The objective of this paper is to investigate the effect of the earnings ratio and capital structure on share price, with special focus on the moderating role of free cash flow (FCF) in the manufacturing sector listed on the Iraqi Stock Exchange (ISX) for the period 2016 to 2023. Using a quantitative research method, the study draws data from audited financial statements, including the income statement, balance sheet, and cash flow statement, and analyzes 10 manufacturing companies over eight years. The analysis employs a regression model, descriptive statistics, correlation analysis, ANOVA, and tests of cross-sectional dependence and non-stationarity to ensure …

Nonparametric Control Charts Estimation Using Hybrid Cyber-Intelligence Algorithms For Stock Market Monitoring, Mariam Jumaah Mousa, Munaf Yousif Hmood

Journal of Economics and Administrative Sciences

This paper introduces a novel nonparametric hybrid cyber-intelligence-based statistical process control and anomaly detection framework in time series data. It is developed to overcome the shortcomings of the classical control schemes in dealing with complex, abnormal, and noisy input data, especially when it is autocorrelated. The proposed methodology combines three technical pillars: First, it utilizes a bidirectional long-short-term memory architecture (Bi-LSTM) to capture long-term time dependency and learn nonlinear patterns, leaving only true deviations as residuals that remove trends and noises from the market. Second, it adopts the Golden Eagle Optimizer (GEO) algorithm for optimal parameter selection. This intelligent algorithm …

The Role Of Distance Learning Technologies In Supporting University Education For Female Students: A Qualitative Case Study In The Context Of Saudi Vision 2030, Majd Ibrahim Alomar

University of Tabuk Journal for Humanities and Social Sciences

This exploratory case study examines the role of distance-learning technologies in shaping instructional practices within gender-separated higher education in Saudi Arabia, a context seldom explored in the global literature on educational technology. Drawing on Sociocultural Theory, the study analyzes how Internet- and Ethernet-based videoconferencing platforms facilitate access, interaction, and engagement for female students taught remotely by male professors, a practice rooted in cultural norms of gender separation. Data were gathered through semi-structured interviews with students, faculty, and administrative staff, classroom observations, and review of institutional documents. The data were analyzed using direct interpretation and categorical aggregation. The findings show that …

Fear Of Missing Out (Fomo) And Its Relation With Digital Distraction Among A Sample Of Saudi University Students, Fatma Khalifa Elsayed, Noora Emad Gharbawi

University of Tabuk Journal for Humanities and Social Sciences

This study aimed to identify the level of Fear of Missing Out (FOMO) and digital distraction, and to examine the relationship between them among a sample of Saudi university students, in addition to exploring gender differences in both FOMO and digital distraction. The study employed the descriptive correlational and comparative approach and included a sample of (438) male and female Saudi university students aged between (18–35) years. The study relied on the FOMO scale (Przybylski et al., 2013), translated by Almatari and Elsayed (2025), and the Digital Distraction Scale by Ibrahim (2025). The results showed a low level of FOMO …

Tumor-Immune Dynamics With Memory And Time Delay: A Fractional-Order Model With Ctla-4 Regulation, Mutaz Mohammad, Mohyeedden Sweidan, Alexander Trounev, Fathalla Rihan

All Works

This study develops a fractional-order tumor-immune interaction model incorporating Caputo memory effects, delayed immune activation, and CTLA-4 checkpoint regulation. The model describes the coupled dynamics of tumor cells, CD4^+ T cells, IFN-γ, and CTLA-4, and extends classical integer-order tumor-immune models by accounting for hereditary immune responses and biologically motivated latency effects. Theoretical properties, including positivity, boundedness, equilibrium structure, and fractional-order stability, are examined to establish the biological and mathematical consistency of the model. The delayed fractional system is then investigated computationally by comparing several numerical methods, including finite difference discretization, Daubechies wavelet collocation, Euler wavelet collocation, and a predictor-corrector scheme. …

Monte Carlo Analysis Of Dose Distribution In Tumour And Adjacent Healthy Tissues During 192Ir Hdr Brachytherapy In The Presence Of Gold Nanoparticles, Damian P. Tippe, Innocent J. Lugendo

Tanzania Journal of Science

High dose rate (HDR) brachytherapy using ¹⁹²Ir is an effective modality for cancer treatment; however, its therapeutic efficiency is often constrained by unintended radiation exposure to healthy tissues surrounding the tumour. Fortunately, the incorporation of high atomic number (Z) nanoparticles as radiosensitizers has emerged as a promising strategy to enhance tumour dose while sparing adjacent normal tissues. In this study, the dose distribution in tumour and nearby healthy tissues during 192Ir HDR brachytherapy was investigated in the presence of gold (Au) nanoparticles using Monte Carlo simulations based on the Geant4 toolkit. Radial dose distributions and anisotropy characteristics were analysed …

The Role Of Zinc Precursor Concentration In Modulating The Structural, Optical, And Electrical Properties Of Sol-Gel Derived Czts Thin Films, Justine John Tibaijuka

Tanzania Journal of Science

This study reports on CZTS thin films fabricated by sol–gel spin coating using zinc acetate dihydrate, copper acetate dihydrate, tin chloride, and thiourea dissolved in methanol with monoethylamine as a stabilizer. The films were annealed rapidly at 540 °C by using an RTP furnace. Results show the significant influence of zinc concentration on films’ properties with band gap evolution between 1.46 and 1.7 eV, along with high absorption coefficients exceeding 10⁴ cm⁻¹ in the visible range. Structurally, the films evolved from poorly crystalline at low Zn content to well- crystallized, (112)-oriented kesterite near stoichiometry. However, excessive Zn caused slight degradation …

Hydrogeochemical Characterization Of Groundwater In Fractured Crystalline Basement Aquifers In Dodoma, Central Tanzania: Implications On Water Quality For Domestic And Irrigation Applications, George J. Ishabairu, Simon R. Melchioly, Charles H. Kasanzu, Gabriel D. Mulibo

Tanzania Journal of Science

Assessment of groundwater hydrogeochemistry characteristics of aquifers plays a vital role in establishing water quality status and its suitability for human and industrial use. The main objective of this research was to carry out hydrogeochemical characterization of groundwater and assess its impacts on water quality and spatial variability of groundwater geochemistry in Dodoma, Tanzania. The methods used include groundwater sampling, laboratory analysis to determine physico- chemical parameters and data processing to classify the groundwater hydrochemical facies. The results show that the average value for pH is 7.2, for electrical conductivity (EC) is 1108 µS/cm and for total dissolved solids (TDS) …

Linear Programming Model For Optimal Crop Allocation Under Varying Land Sizes In Pawaga, Tanzania, Mustapha Abbas Kiswanya, Seleman Ismail, Saul Mpeshe

Tanzania Journal of Science

Farmers often rely on intuition when selecting crops, which can lead to suboptimal profits. In this study, we examine the optimal annual crop allocation under varying land sizes for farmers in Pawaga, Iringa District, Tanzania. A parametric linear programming (LP) model is developed to determine crop allocation combinations that maximise profit subject to land, labour, and capital constraints. Unlike conventional approaches that require separate models for different farm sizes, the proposed model accommodates land holdings ranging from 1 to 9 acres and integrates nine crop types within a single framework. Data were collected over three (3) agricultural seasons from extension …

Joint Channel And Phase Noise Estimation For Mmwave Ofdm Systems Using Adaptive Kalman Filtering, Kwame Salum Ibwe

Tanzania Journal of Science

This manuscript presents a joint channel and phase-noise estimation framework for millimeter-wave (mmWave) OFDM systems based on an adaptive extended Kalman filter (EKF). The proposed method formulates a unified state-space model that simultaneously tracks time-varying multipath channels and oscillator phase noise, a critical impairment in 5G NR frequency range 2 (FR2) and emerging 6G transceivers. An innovation-based covariance adaptation mechanism is introduced to enhance estimation accuracy while maintaining computational efficiency. Simulation results demonstrate that the proposed approach achieves up to a 5 dB SNR gain at a target BER of 10⁻³, maintains NMSE below 10⁻³ for linewidths up to 200 …

Modelling Of Dust Devil Flow Dynamics: Effects Of The Sharpness Parameter On Velocity And Pressure, Deepanshu Kumar, Hossein Jafari

Mathematical Modelling and Numerical Simulation with Applications

This work discusses the development of a straightforward model of dust devils, demonstrating a method for estimating wind speed and pressure. The current model incorporates momentum equations and the mass conservation equation for steady, axisymmetric, inviscid, and incompressible flow. In this model, the radial velocity is first considered, which is restricted in both the radial and axial directions. The sharpness parameter is also incorporated into the radial velocity formulation, as described by Vatistas model. Using the radial velocity as a foundation, we derive the azimuthal and axial velocities. The study further evaluates the pressure. Notably, for large values of the …

Dynamical Behavior, Extinction And Persistence In A Stochastic Delayed Two-Strain Epidemic Model With A Generalized Crowley-Martin Incidence Rate, Amina Allali, Dounia Bentaleb, Saida Amine

Mathematical Modelling and Numerical Simulation with Applications

This paper develops and analyzes a novel delayed stochastic SIR epidemic model with two interacting strains and general incidence functions. By establishing the existence and uniqueness of a positive global solution, the well-posedness of the model under stochastic perturbations is ensured. Extinction occurs when the stochastic reproduction number falls below unity, as demonstrated through Itô calculus and martingale convergence theorems, while persistence is guaranteed under the Crowley–Martin incidence when it exceeds one. Numerical experiments based on the Positive Preserving Truncated Euler–Maruyama (PPTEM) scheme confirm the analytical predictions and highlight the influence of time delay and noise intensity on the long-term …

Tumor–Immune Dynamics With Memory And Time Delay: A Fractional-Order Model With Ctla-4 Regulation, Mutaz Mohammad, Mohyeedden Sweidan, Alexander Trounev, Fathalla Rihan

Mathematical Modelling and Numerical Simulation with Applications

This study develops a fractional-order tumor-immune interaction model incorporating Caputo memory effects, delayed immune activation, and CTLA-4 checkpoint regulation. The model describes the coupled dynamics of tumor cells, CD4$^{+}$ T cells, IFN-$\gamma$, and CTLA-4, and extends classical integer-order tumor-immune models by accounting for hereditary immune responses and biologically motivated latency effects. Theoretical properties, including positivity, boundedness, equilibrium structure, and fractional-order stability, are examined to establish the biological and mathematical consistency of the model. The delayed fractional system is then investigated computationally by comparing several numerical methods, including finite difference discretization, Daubechies wavelet collocation, Euler wavelet collocation, and a predictor-corrector scheme. …

Stochastic Analysis Of Epidemic Size And Peak Infection In An Svir Model With Imperfect Vaccine And External Source Of Infection, María Gamboa Pérez

Mathematical Modelling and Numerical Simulation with Applications

The dynamics of an infectious disease outbreak are studied under a stochastic framework in a closed population where individuals are homogeneously mixed. A vaccination program is implemented in the community prior to the start of the epidemic. The administered vaccine is imperfect, meaning that vaccinated individuals may still become infected upon contact with infected individuals. The mathematical Susceptible-Vaccinated-Infected-Recovered (SVIR) model describing the evolution of the epidemic is formulated as an absorbing, continuous-time, three-dimensional Markov chain with compartments for vaccinated, susceptible, infected and recovered individuals. The aim of this study is to characterize two fundamental epidemiological quantities: the maximum number of …

Numerical Method For Strongly Variable-Density Flows At Low Mach Number: Flame-Sheet Regularisation And A Mass-Flux Immersed Boundary Method, Matheus P. Severino, Fernando F. Fachini, Elmer M. Gennaro, Daniel Rodríguez, Leandro F. Souza

Mathematical Modelling and Numerical Simulation with Applications

A low-Mach-number flow, in the laminar regime, has intrinsically two characteristic spatial scales for a given time scale, or two characteristic temporal scales for a given spatial scale, and these dual scales are very different due to the disparity between the flow and acoustic speed. Therefore, low-Mach-number flows impose mathematical and computational challenges in their description. Standard numerical methods for compressible flows, which are typically designed for problems with a single dominant spatial and temporal scale, require alternative approaches, such as preconditioning techniques or solvers tailored for low-Mach-number equations. The present work introduces a simplified fluid dynamics model for flows …

Re: Conditional Approval Letter For Diggings East 100% Remedial Design Package Submittal (Dated May 29, 2006), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Conditional Approval Letter For The Butte Priority Soils Operable Unit (Bpsou) Silver Bow Creek Conservation Area (Sbcca) Operations And Maintenance (O&M) Plan (Dated May 29, 2006), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Re: Conditional Approval Letter For The Final Revised Silver Bow Creek Conservation Area (Sbcca) Construction Quality Assurance Plan (Cqap) (Dated May 28, 2026) And The Final Silver Bow Creek Conservation Area (Sbcca) Construction Monitoring Quality Assurance Project Plan (Qapp) (Dated May 28, 2026), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Third Butte Rmap Biomonitoring (Phase 3) Report, Ramboll, Atlantic Richfield Company

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Modeling Framework To Demonstrate Elimination Of A Vector Population: Tsetse Elimination In Chad, John Hargrove, Mahamat Hissene Mahamat, Moukhtar Aldjibert, Wilfrid Yoni, Djoukzoumka Signaboubo, Justin Darnas, Ernest Salou, Inaki Tirados, Albert Mugenyi, Priscille Barreaux, Philippe Solano, Antoine Marc Gaby Barreaux

All Peer-Reviewed Publications

Every year, over 700,000 people, particularly children under five, die from vector-borne diseases worldwide. Effectively controlling endemics and preventing new outbreaks requires an integrated approach that can lead to the elimination of both vectors and diseases. In the last two decades, integrating medical interventions and vector control has significantly reduced the incidence of Gambian Human African Trypanosomiasis (g-HAT), with the World Health Organization validating eight countries as having eliminated the disease as a public health problem. However, elimination of the tsetse vector has not been confirmed, leaving the possibility of re-emergence. We developed a six-step modeling framework to assess vector …