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Articles 4201 - 4230 of 193307

Full-Text Articles in Engineering

Numerical Simulation Of Co2 Sequestration Combined With Enhanced Geothermal Energy Extraction In Deep Saline Aquifers, Xie Zehao, Zhang Liehui, Zhao Yulong, Cao Cheng, Kou Zuhao, Zhang Deping, Li Jinlong Jan 2026

Numerical Simulation Of Co2 Sequestration Combined With Enhanced Geothermal Energy Extraction In Deep Saline Aquifers, Xie Zehao, Zhang Liehui, Zhao Yulong, Cao Cheng, Kou Zuhao, Zhang Deping, Li Jinlong

Coal Geology & Exploration

Objectives and Methods Deep saline aquifers represent ideal spaces for geologic CO2 sequestration while also featuring high geothermal gradients and abundant geothermal resources. The combination of CO2 sequestration and geothermal energy extraction holds great significance for enhancing the CO2 sequestration effect and achieving integrated resource development of deep saline aquifers. Therefore, this study proposed a development approach that combined CO2 sequestration with geothermal energy extraction in deep saline aquifers and established a thermo-hydro-chemical coupling numerical simulation model of the gas-water two-phase flow. Accordingly, it explored the optimal injection mode, production and injection well patterns, and injection …

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Numerical Simulations Of The Safety Of Geologic Co2 Storage In Saline Aquifers In The Enping Sag, Pearl River Mouth Basin, Yu Tao, Li Xiwen, Yang Yunshi, Chen Bingbing, Ji Zemin, He Chang, Jiang Lanlan, Song Yongchen Jan 2026

Numerical Simulations Of The Safety Of Geologic Co2 Storage In Saline Aquifers In The Enping Sag, Pearl River Mouth Basin, Yu Tao, Li Xiwen, Yang Yunshi, Chen Bingbing, Ji Zemin, He Chang, Jiang Lanlan, Song Yongchen

Coal Geology & Exploration

Background Since the beginning of the Industrial Revolution, excessive CO2 emissions have aggravated the greenhouse effect. Against this backdrop, CO2 capture, utilization, and storage (CCUS) technology has emerged as a critical countermeasure. Particularly, geologic CO2 storage holds enormous application potential. China has implemented a demonstration project of geologic CO2 storage in saline aquifers located in the Enping Sag, Pearl River Mouth Basin. Nevertheless, this sag exhibits formation dip angles and widely distributed fracture zones, which affect CO2 migration and storage. Methods Focusing on the Enping Sag, this study established a two-dimensional model of the saline …

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Advances And Prospects Of Research On In Situ Co2 Mineralization Storage In Basalts, Wang Xiao, Wu Bin, Shi Xiangchao, Ye Zhongbin, Wei Bing, Wang Guanhua, Alvarado Vladimir, Huang Kailin, Yang Zeyong Jan 2026

Advances And Prospects Of Research On In Situ Co2 Mineralization Storage In Basalts, Wang Xiao, Wu Bin, Shi Xiangchao, Ye Zhongbin, Wei Bing, Wang Guanhua, Alvarado Vladimir, Huang Kailin, Yang Zeyong

Coal Geology & Exploration

Background CO2 storage in basalts, enjoying distinct advantages of rapid mineralization and high safety, has gradually emerged as a hot research topic both in China and abroad. This study presents a systematic review of the current status of research on the mechanisms of in situ CO2 mineralization storage, the evolutionary characteristics of the physical properties of strata under the condition of mineralization reactions, and representative demonstration projects. On this basis, the future research directions are proposed. Advances The in situ CO2 mineralization storage in basalts is essentially a process of CO2-water-rock reactions, achieved primarily through …

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Research Progress And Prospects Of Full Flowsheet Coal-Based Ccus, Sang Shuxun, Liu Shiqi, Zheng Sijian, Huang Fansheng, Liu Tong, Chen Siming, Zhou Xiaozhi, Han Sijie, Tian Yuchen, Xiang Wenxin, Bai Yansong Jan 2026

Research Progress And Prospects Of Full Flowsheet Coal-Based Ccus, Sang Shuxun, Liu Shiqi, Zheng Sijian, Huang Fansheng, Liu Tong, Chen Siming, Zhou Xiaozhi, Han Sijie, Tian Yuchen, Xiang Wenxin, Bai Yansong

Coal Geology & Exploration

Background The engineering-oriented, full flowsheet coal-based carbon capture, utilization, and storage (CCUS) technology is the key to efficient, clean coal utilization and carbon emission reduction. It represents a major technology that is urgently needed to ensure the energy security of China and achieve the strategic goals of peak carbon dioxide emissions and carbon neutrality of the country. Based on previous research efforts of the authors’ team, this study reviews the current status of this technology, reveals its integration mechanisms, and attempts to establish a pattern and scheme for CCUS cluster deployment in coal energy bases. Furthermore, it discusses the future …

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An Experimental Study On Nonlinear Seepage Characteristics In Coal Seams During Ch4 Displacement Through N2 And Co2 Flooding, Li Zefeng, Huang Mengru, Zhang Hongzhong, Lan Jianping, Song Jinsuo, Fan Shixing Jan 2026

An Experimental Study On Nonlinear Seepage Characteristics In Coal Seams During Ch4 Displacement Through N2 And Co2 Flooding, Li Zefeng, Huang Mengru, Zhang Hongzhong, Lan Jianping, Song Jinsuo, Fan Shixing

Coal Geology & Exploration

Background Coal seams in China are generally characterized by low porosity (<5%) and low permeability (0.001×10–3μm2), leading to low coalbed methane (CBM, dominated by CH4) drainage efficiency. Gas flooding-enhanced CBM drainage technology plays a significant role in surface CBM drainage, underground CBM pre-drainage, and deep geologic CO2 storage. Methods This study investigated four common types of gases: N2 and CO2 for flooding, CH4 to be displaced, and He for blank control. Based on the physical properties of these gases and employing methods including the quasi-static method, the gas flow rate method, and the Reynolds …

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Table Of Contents, The Editors Jan 2026

Table Of Contents, The Editors

Coal Geology & Exploration

No abstract provided.

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Numerical Simulations Of The Impacts Of Co2-Induced Calcite Dissolution On The Permeability And Elastic Parameters Of Rocks, Yang Bo, Xu Tianfu, Feng Guanhong, Zhu Huixing Jan 2026

Numerical Simulations Of The Impacts Of Co2-Induced Calcite Dissolution On The Permeability And Elastic Parameters Of Rocks, Yang Bo, Xu Tianfu, Feng Guanhong, Zhu Huixing

Coal Geology & Exploration

Objective CO2 dissolution in water tends to induce mineral reactions, thus significantly changing the pore structure of rocks and further affecting their seepage and mechanical properties. This phenomenon poses a major impact on the suitability and long-term safety of geologic CO2 sequestration engineering. Methods Using a simulation technology that combines the lattice Boltzmann method (LBM) and the finite element method (FEM), this study systematically investigated the calcite dissolution characteristics of calcite-bearing rock samples under varying injection rates of a saturated solution of CO2. Furthermore, the dynamic evolution patterns of the permeability and elastic parameters (bulk and …

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Advances In Research On Geochemistry Of Co2 Storage In Basalts: Microscopic Mechanisms And Reaction Pathways, Ma Shijia, Xia Changyou, Gao Zhihao, Rui Zhenhua, Liang Xi Jan 2026

Advances In Research On Geochemistry Of Co2 Storage In Basalts: Microscopic Mechanisms And Reaction Pathways, Ma Shijia, Xia Changyou, Gao Zhihao, Rui Zhenhua, Liang Xi

Coal Geology & Exploration

Objective and Method The urgent need to reduce global greenhouse gas emissions has driven the development of CO2 mineral trapping in basalts. To gain further insights into the microscopic mechanisms and reaction pathways of the mineral trapping, this study systematically reviews the geochemical reaction mechanisms involved, with a particular focus on the differences in reaction pathways between supercritical and dissolved CO2 injection, the coupling between mineral dissolution and carbonate precipitation, and the key factors influencing these reactions. Advances In the case of supercritical CO2 injection, CO2 mineral trapping is achieved through multi-step coupling reactions in nanoscale …

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Research And Application Of A Decision Support Platform For Geologic Co2 Storage Siting Based On A Global Case Database, Zhou Yinbang, Wang Rui, Zhen Yan, Dai Quanqi, Cheng Chuanjie Jan 2026

Research And Application Of A Decision Support Platform For Geologic Co2 Storage Siting Based On A Global Case Database, Zhou Yinbang, Wang Rui, Zhen Yan, Dai Quanqi, Cheng Chuanjie

Coal Geology & Exploration

Objective Under the strategic background of reaching the goals of peak CO2 emissions and carbon neutrality, there is an urgent need to address the core issue of geologic CO2 storage (GCS) siting in the advancement of large-scale GCS deployment. Establishing a decision support platform based on a global GCS case database can provide key data and historical experience references for GCS siting, reduce storage risks and costs, and accelerate industrial layout. Furthermore, the platform can offer a scientific basis for formulating related policies and conducting technological R&D.Methods This study proposed and developed a comprehensive evaluation system for …

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Carbon Sequestration Technology: Challenges And Urgent Critical Scientific Issues, Li Xiaochun, Liu Tianyu, Zhang Liwei, Zhou Hong, Liu Guizhen, Wang Yan, Gan Manguang, Li Qi Jan 2026

Carbon Sequestration Technology: Challenges And Urgent Critical Scientific Issues, Li Xiaochun, Liu Tianyu, Zhang Liwei, Zhou Hong, Liu Guizhen, Wang Yan, Gan Manguang, Li Qi

Coal Geology & Exploration

Objective Carbon sequestration technology represents a core approach to achieving carbon neutrality. However, its large-scale application remains constrained by multiple technical and scientific challenges. Methods Based on an analysis of existing carbon sequestration projects, this study identified four major challenges in carbon sequestration: (1) high uncertainty in the assessment of CO2 sequestration capacity; (2) low injectivity of low-permeability discontinuous reservoirs; (3) a limited understanding of long-term mechanical stability; and (4) significant difficulty in assessing the risks of CO2 leakage. Results To address these challenges, this study proposes the common issues currently faced by carbon sequestration technology, and, accordingly, …

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Designation And Classification Of Co2 Storage Technologies, Ma Fubo, Yang Xuechao, Zhou Zhengwu, Liu Hongliang, Chang Jia, Yi Jiayao, Wang Yan Jan 2026

Designation And Classification Of Co2 Storage Technologies, Ma Fubo, Yang Xuechao, Zhou Zhengwu, Liu Hongliang, Chang Jia, Yi Jiayao, Wang Yan

Coal Geology & Exploration

Objective and Method Currently, there remains a lack of criteria for technical certification, designation, and classification of carbon dioxide (CO2) storage technologies due to their cross-disciplinary nature and ambiguous scopes. To address this issue, this study proposes technical certification criteria and designation principles, as well as analyzes four types of common CO2 storage technologies: geologic storage, underground space storage, ocean water storage, and utilization and storage. Accordingly, a classification philosophy and scheme for these technologies is determined.Results and Conclusions In terms for technical certification criteria, a CO2 storage technology has to meet four criteria: (1) …

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Concept Of Cccus Technology For Co2 Recycling In Deep Unmineable Coal Seams, Liang Weiguo, Yan Jiwei, Zhu Dijie, Guo Hongguang, Gong Li, Niu Dong Jan 2026

Concept Of Cccus Technology For Co2 Recycling In Deep Unmineable Coal Seams, Liang Weiguo, Yan Jiwei, Zhu Dijie, Guo Hongguang, Gong Li, Niu Dong

Coal Geology & Exploration

Background China possesses substantial resources of deep unmineable coal seams, which hold considerable potential for CO2 sequestration. However, simply sequestrating CO2 in deep coal seams incurs high economic costs while also wasting deep coal resources. The microbial conversion of sequestrated CO2 into methane (CH4) enables circular carbon capture, utilization, and storage (CCCUS), which is of great significance for the sustainable development of both resources and the environment.Methods Using a range of methods, including experimental study, theoretical analysis, and engineering simulations, CCCUS in deep unmineable coal seams is designed to (1) reveal the mechanisms behind …

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An Improved Model Of Trans-Critical Ch4 And Co2 Adsorption In Coals Based On Monolayer Adsorption And Adsorption Potential Theories, Song Xuemei, Zhang Kun, Sang Shuxun, Ma Mengya, Liu Huihu, Xu Hongjie Jan 2026

An Improved Model Of Trans-Critical Ch4 And Co2 Adsorption In Coals Based On Monolayer Adsorption And Adsorption Potential Theories, Song Xuemei, Zhang Kun, Sang Shuxun, Ma Mengya, Liu Huihu, Xu Hongjie

Coal Geology & Exploration

Objective and Method Adsorbed phase density represents a key parameter for determining gas adsorption capacity in coals. Using bituminous coal samples from the Huainan and Huaibei mining areas in Anhui Province, this study carried out high-pressure isothermal adsorption experiments of CO2 and CH4 at temperatures of 24 ℃, 36 ℃, and 48 ℃. In combination with the quantitative characterization of pore structures in coals using low-temperature liquid nitrogen adsorption (LNA) experiments and mercury intrusion porosimetry (MIP), this study analyzed the high-pressure trans-critical CH4 and CO2 adsorption processes in coals. Meanwhile, based on the Gibbs excess adsorption, …

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A Method Of Carbon Emission Accounting And Pathways Of Emission Reduction Through Reduction Through Ccus For Underground Coal Mines, Xu Shen, Wang Meng, Dai Xuguang, Qiu Yuxin, Tuo Jialong, Li Wenhao, Gao Jie Jan 2026

A Method Of Carbon Emission Accounting And Pathways Of Emission Reduction Through Reduction Through Ccus For Underground Coal Mines, Xu Shen, Wang Meng, Dai Xuguang, Qiu Yuxin, Tuo Jialong, Li Wenhao, Gao Jie

Coal Geology & Exploration

Objective Coal production and utilization lead to substantial carbon emissions, and the carbon emissions from underground coal mines have attracted increasing attention. However, research on emission reduction pathways in coal mines remains nascent. Methods The Y Coal Mine was investigated in this study. Using methods including life cycle assessment (LCA), emission factor approach, and monitoring, this study identified the boundaries for carbon emission accounting and determined the sources, total amount, and characteristics of carbon emissions from the coal mine. Furthermore, a framework of carbon emission reduction through CCUS was established based on the principle of carbon capture, utilization, and storage …

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Research Advances And Prospects Of Geologic Co2 Sequestration Models, Hu Chenlin, Dong Cheng, Sang Shuxun, Tang Yong, Li Xin, Zhang Bin, Zhao Lingfeng Jan 2026

Research Advances And Prospects Of Geologic Co2 Sequestration Models, Hu Chenlin, Dong Cheng, Sang Shuxun, Tang Yong, Li Xin, Zhang Bin, Zhao Lingfeng

Coal Geology & Exploration

Background The urgent need to respond to global climate change and to achieve carbon neutrality is driving geologic CO2 sequestration technology to be increasingly large-scale, safe, and intelligent. Since the CO2 sequestration process involves multi-physical field coupling, the engineering feasibility and long-term safety of CO2 sequestration heavily rely on the capacity of numerical models to perform accurate characterization of complex subsurface processes. Therefore, establishing a model system, covering the entire process consisting of injection, migration, sequestration, and monitoring, that is suitable for various geobodies for CO2 sequestration has emerged as a foundation for the engineering application …

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Distribution Characteristics And Mechanisms Of Ch4 And Co2 Adsorption In Montmorillonite Nanopores In Water-Bearing And Saline Environments, Du Kai, Rui Zhenhua, Qian Cheng, Chen Siwei Jan 2026

Distribution Characteristics And Mechanisms Of Ch4 And Co2 Adsorption In Montmorillonite Nanopores In Water-Bearing And Saline Environments, Du Kai, Rui Zhenhua, Qian Cheng, Chen Siwei

Coal Geology & Exploration

Background Carbon capture, utilization, and storage (CCUS) has emerged as a significant way to reduce greenhouse gas emissions under the guidance of the strategic goals of peak carbon dioxide emissions and carbon neutrality. With the continuous exploitation of unconventional hydrocarbon resources such as shale oil and gas, varying water-bearing and salinity conditions exert significant impacts on the occurrence stability and seepage behavior of CO2, thereby reducing the efficiency and safety of CO2 storage. Therefore, a thorough understanding of the competitive behavior and distribution patterns of CO2 and other gases in shale nanopores under varying water-bearing and …

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Advances In Research On The In Situ Co2 Mineral Trapping In Buried Volcanoes, He Yanxin, Tian Wei, Xian Benzhong, Liu Pingping, Wei Mingcong, Wei Qiwen, Deng Xuanyu, Liu Jianping, Gu Jiapeng Jan 2026

Advances In Research On The In Situ Co2 Mineral Trapping In Buried Volcanoes, He Yanxin, Tian Wei, Xian Benzhong, Liu Pingping, Wei Mingcong, Wei Qiwen, Deng Xuanyu, Liu Jianping, Gu Jiapeng

Coal Geology & Exploration

Objective and Methods Driven by the goal of carbon neutrality, geologic CO2 storage has become a critical national priority in China. Compared to conventional reservoirs in sedimentary basins, such as saline aquifers, depleted hydrocarbon reservoirs, and unmineable coal seams, basaltic formations offer more significant advantages in geologic CO2 storage. Specifically, basaltic formations can form stable carbonates through reactions between CO2 and rock minerals while also exhibiting extensive distribution, considerable potential for CO2 storage, and low risk of CO2 leakage. The engineering feasibility of geologic CO2 storage in basaltic formations has been validated by the …

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Reinforced Scan: A Reinforcement Learning Enabled Optimal Laser Scan Path Planning In Laser Powder Bed Fusion Additive Manufacturing, Chaoran Dou, Jihoon Chung, Raghav Gnanasambandam, Yuhao Wu, Jianzhi Li, Zhenyu James Kong Jan 2026

Reinforced Scan: A Reinforcement Learning Enabled Optimal Laser Scan Path Planning In Laser Powder Bed Fusion Additive Manufacturing, Chaoran Dou, Jihoon Chung, Raghav Gnanasambandam, Yuhao Wu, Jianzhi Li, Zhenyu James Kong

Manufacturing & Industrial Engineering Faculty Publications

Additive Manufacturing is an innovative technology that fabricates parts layer by layer. However, in Laser Powder Bed Fusion (LPBF), printed metal parts often exhibit residual stresses, deformations, and other defects due to non-uniform temperature distribution during the printing process. To mitigate these issues, an optimized scan sequence within each layer can improve thermal uniformity. Traditional optimization methods, which rely on domain knowledge and employ trial-and-error or heuristic approaches, often fail to achieve optimal solutions due to the complex nature of the problem. One major challenge in improving scan strategies lies in the vast search space required to optimize the scan …

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Fuzzy Pi Controller For Frequency Control Of A Diesel-Pv-Battery-Based Islanded Ac Microgrid, M. S. Elborlsy, Ramadan M. Mostafa, Hossam E. Keshta, Mohamed A. Ghalib Jan 2026

Fuzzy Pi Controller For Frequency Control Of A Diesel-Pv-Battery-Based Islanded Ac Microgrid, M. S. Elborlsy, Ramadan M. Mostafa, Hossam E. Keshta, Mohamed A. Ghalib

Mansoura Engineering Journal

Effective management of modern electrical grids requires intelligent and adaptable control mechanisms to effectively balance power supply and demand, particularly in times of significant disturbances. Microgrids predominantly harness renewable energy sources (RES), which are inherently variable, for electricity generation. However, due to these fluctuations, conventional control systems often struggle to optimize performance under diverse operational conditions. This study addresses the need for improved frequency regulation in isolated AC microgrids (MGs) by proposing a fuzzy PI (FPI) controller capable of dynamically adjusting control strategies to accommodate disturbances such as three-phase faults, sudden changes in load, and variations in solar irradiance. A …

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The Role Of Side-Chain Length And Counterion Mediation On Dimerization Of Rigid Sphere-Rod Amphiphiles: A Molecular Dynamics Investigation, Mesfin Tsige, Tianbo Liu, Javad Tamnanloo, Abdol Hadi Mokarizadeh Jan 2026

The Role Of Side-Chain Length And Counterion Mediation On Dimerization Of Rigid Sphere-Rod Amphiphiles: A Molecular Dynamics Investigation, Mesfin Tsige, Tianbo Liu, Javad Tamnanloo, Abdol Hadi Mokarizadeh

University Research

Rigid sphere-rod amphiphiles (RSRAs) comprising a Keggin polyoxometalate (POM) headgroup and an oligofluorene rod with different side chain lengths (C2, C6, C10, C16, are the number of carbon atoms per side chain) were probed by all-atom molecular dynamics in THF/water mixtures (15 and 33 vol % THF) with tetrabutylammonium (TBA+) counterions to elucidate the molecular origins of dimerization. Despite strong Keggin-Keggin electrostatic repulsion, stable dimers form through a synergy of (i) hydrophobic rod/side-chain interaction that strengthens with side-chain length and (ii) counterion-mediated attraction by TBA+, which localizes near the Keggins to screen electrostatic repulsion. Packing evolves from near-parallel rods for …

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Statistical Analysis Of Log Transformation Effectiveness In Air Traffic Movement Forecasting During Covid-19 In South Africa, John Lehlaka Masekoameng Jan 2026

Statistical Analysis Of Log Transformation Effectiveness In Air Traffic Movement Forecasting During Covid-19 In South Africa, John Lehlaka Masekoameng

Journal of Aviation Technology and Engineering

This study evaluates the effectiveness of log transformation in enhancing multiple regression models used to forecast air traffic movements (ATMs) in South Africa during the COVID-19 pandemic. Using 60 monthly observations from October 2016 to September 2021, the analysis incorporates variables such as revenue, lockdown levels, COVID-19 metrics, exchange rates, gross domestic product, and population. Two models are compared: one using raw ATMs and another with log-transformed ATMs as the dependent variable.

While the untransformed model shows stronger explanatory power (R² = 0.904, adjusted R² = 0.891) compared to the log-transformed model (R² = 0.772, adjusted R² = 0.741), the …

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Climate Change Impact On Cooling Energy Demand Of Major Airports In Nigeria, Abdullah C. Salihu, Yahaya Z. Ibrahim, Rukayyat Abdulkarim, Emmanuel I. Aruya Jan 2026

Climate Change Impact On Cooling Energy Demand Of Major Airports In Nigeria, Abdullah C. Salihu, Yahaya Z. Ibrahim, Rukayyat Abdulkarim, Emmanuel I. Aruya

Journal of Aviation Technology and Engineering

Rising global temperatures due to climate change are intensifying the cooling energy demands of critical infrastructure, including airports. This study assesses the impact of climate change on the cooling energy needs of five major international airports in Nigeria (Abuja, Enugu, Kano, Lagos, and Port Harcourt) using cooling degree days (CDDs) derived from the Coupled Model Intercomparison Project (CMIP6) multi-model ensemble climate projections. Monthly and annual CDD calculated with a base temperature of 18°C were obtained from the World Bank Climate Change Knowledge Portal (CCKP) at a spatial resolution of 25 km × 25 km. Percentage changes in CDD were analyzed …

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Advanced Qualification Program Assessments In Aviation Higher Education: A Theoretical Framework, Jorge L. D. Albelo Ph.D., Victor M. Fraticelli Rivera Ph.D. Jan 2026

Advanced Qualification Program Assessments In Aviation Higher Education: A Theoretical Framework, Jorge L. D. Albelo Ph.D., Victor M. Fraticelli Rivera Ph.D.

Journal of Aviation Technology and Engineering

This study investigates the integration of an Advanced Qualification Program (AQP)-centered approach into aviation higher education, aiming to refine assessment methods and enhance the educational experience of future aviation professionals. Guided by research questions exploring the strengths, limitations, key characteristics, and potential improvements of AQP-centered assessments, the study reveals a strong consensus among students and faculty. The AQP model, traditionally an alternative to conventional pilot training under 14 CFR Parts 121 and 135, offers a structured, industry-relevant framework emphasizing clear evaluation processes, multilevel knowledge and skill assessments, and high academic performance. Findings indicate that effective AQP assessments balance theoretical knowledge, …

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Integrating Human Factors, Technology, And Mental Health: A Mixed-Methods Framework For Aviation Maintenance Safety In The Philippines, Arthur Dela Peña Jan 2026

Integrating Human Factors, Technology, And Mental Health: A Mixed-Methods Framework For Aviation Maintenance Safety In The Philippines, Arthur Dela Peña

Journal of Aviation Technology and Engineering

A complex interaction of human factors, mental health, organizational dynamics, and emerging technologies influences aviation maintenance safety in the Philippines. This study aims to develop an integrated framework to address these aspects and reduce maintenance-related errors. Using a mixed-methods approach based on Creswell’s pragmatic paradigm, the research surveyed 200 participants, including aviation maintenance technicians (AMTs), supervisors, and managers, and conducted in-depth interviews and focus groups. Quantitative analysis revealed that fatigue was a significant contributor to maintenance errors, accounting for 45% of recorded incidents and exhibiting a strong correlation with error rates (r = 0.71, p = 0.005). Incorporating human factors …

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Exploring The Reduction Of Runway Incursions Through Training, Vasilios (Billy) Constaintine Metallinos Jan 2026

Exploring The Reduction Of Runway Incursions Through Training, Vasilios (Billy) Constaintine Metallinos

Journal of Aviation Technology and Engineering

Runway incursions are prevalent aviation safety issues that result in adverse outcomes. The focus of this qualitative case study was exploring the reduction of runway incursions through training for pilots. Applying social cognitive theory (SCT) provided this study with a theoretical underpinning. Conducting interviews and a focus group with 17 participants allowed for the collection of enough data and resulted in identifying the importance of training in preventing runway incursions. Based on the thematic analysis conducted, it was identified that evidence-based, scenario-based, and continuous training can be used to reduce runway incursions caused by pilot deviations. The results contribute to …

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Advanced Control Strategy For Photovoltaic Dc Microgrids Using Model Predictive Control With Rl Filter Enhancement, Yagub Suleymanov Jan 2026

Advanced Control Strategy For Photovoltaic Dc Microgrids Using Model Predictive Control With Rl Filter Enhancement, Yagub Suleymanov

Student Theses and Dissertations

This thesis presents the modeling and control of a photovoltaic (PV)-based DC microgrid using MATLAB/Simulink. A DC–DC converter with a buck stage is employed to perform a better maximum power point tracking (MPPT) and voltage regulation from PV panel. Predictive control method (MPC) algorithm will be employed, which offers faster transient response and reduced oscillations compared to traditional techniques. Considering the existing works, this study introduces an additional RL filter branch to further improve the stability of the regulated DC bus voltage combining MPC method and Incremental Conductance Maximum Power Point Tracking (IC-MPPT) algorithm. To ensure stable operation of the …

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Ai-Driven Automatic Fault Detection Systems: Revolutionizing Modern Smart Grids, Aravind Sanikommu Jan 2026

Ai-Driven Automatic Fault Detection Systems: Revolutionizing Modern Smart Grids, Aravind Sanikommu

Student Theses and Dissertations

The increasing complexity of current power systems, resulting from the integration of distributed generators and renewable energy sources, necessitates intelligent and adaptive fault detection schemes. Traditional protection using impedance and phasor analysis is usually weak when operating in nonlinear and transient operating conditions. Consequently, the tools of Data-driven fault classification and decision-making have gained strength under artificial intelligence (AI) and machine learning (ML) to improve grid reliability. This thesis is a proposal of an automatic fault detection and classification system based on AI applied to a smart mini-grid setting built in MATLAB/Simulink. A complete set of voltage and current data …

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Direct Solar-Energy Powered Hydrothermal Treatment To Promote Biomethane Production From Anaerobic Digestion Of Rice Processing Waste, Kainat Rahnuma Jan 2026

Direct Solar-Energy Powered Hydrothermal Treatment To Promote Biomethane Production From Anaerobic Digestion Of Rice Processing Waste, Kainat Rahnuma

Student Theses and Dissertations

Hydrolysis is a slow and energy-intensive process and a rate-limiting step in anaerobic digestion (AD). This research investigates performance strategies for integrating hydrothermal treatment (HT) with AD. HT-AD systems were less economically viable than AD-only options because of the high energy consumption of HT. Therefore, we used solar energy to conduct HT via either solar cookers or solar panels. The HT method significantly improved digestion performance, reducing the lag phase from 60 to 24 h, and increasing overall yield. Hydrothermally treated rice, rice bran, and rice hulls produced 22,932 mL, 13,136 mL, and 1283 mL, respectively. However, untreated rice, rice …

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Spline-Based Factor-Graph Optimization With High-Grade Inertial Sensors, Kyle Leland, Clark N. Taylor, David Woodburn, Randal Beard Jan 2026

Spline-Based Factor-Graph Optimization With High-Grade Inertial Sensors, Kyle Leland, Clark N. Taylor, David Woodburn, Randal Beard

Faculty Publications

Inertial measurement units (IMUs) are central to global navigation satellite system-based and alternative navigation solutions. This paper combines three lines of research to explore a novel methodology for using inertial sensors: factor graphs, spline-based trajectory estimation, and high-grade inertial sensing. Spline-based factor-graph trajectory estimation is increasingly used in the literature, especially for asynchronous or high-rate sensors. However, prior models neglect the impact of the Earth’s rotation, which is significant for high-grade IMUs. We extend spline-based factor graphs to incorporate accelerometer and gyroscope models that account for the Earth’s rotation. We apply this approach to simulated data from high-grade inertial sensors …

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Angular Scanning Method For Efficient Maximum Power Point Tracking, Saikot Hossain Dadon Jan 2026

Angular Scanning Method For Efficient Maximum Power Point Tracking, Saikot Hossain Dadon

Student Theses and Dissertations

The Photovoltaic System (PV) is one of the widely used sources of renewable energy. There are various control mechanisms to manipulate the PV system. However, one of the major control mechanisms is Maximum Power Point Tracking (MPPT) to extract the maximum power from the solar panel. The solar power is intermittent and stochastic in nature due to the unpredictable sunlight exposure to the solar panel and temperature variance throughout the day and year. Consequently, the PV module does not run at Maximum Power Point (MPP) naturally; therefore, an MPPT controller is utilized so that the solar panel runs in the …

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