174 results for "Muhammad Waleed"
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Journal Article
Assessment of Left Ventricular Dysfunction Post Transcatheter Patent Ductus Arteriosus Closure in Pediatric Patients
Objectives: To compare Left Ventricular (LV) function before and after Transcatheter Patent Ductus Arteriosus (PDA) closure and to identify factors associated with LV dysfunction following device closure. Study Design: Quasi- experimental study. Place and Duration of Study: Armed Forces Institute…
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A national cross-sectional study on the retention of basic life support knowledge among nurses in Palestine
BACKGROUND: 17.9 million deaths worldwide were attributable to cardiovascular diseases. Basic life support is one of the crucial strategies that could increase chances of cardiac arrest victims’ survival rate by nurses and other healthcare providers. AIM: The aims of this study was to examine the…
Also available at: DOAJ
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Nonlinear finite element assessment of an offshore wind turbine ring-flange joint under adjacent missing-bolt configurations
Bolted ring-flange connections are critical to the structural integrity of wind-turbine towers, while the absence of several adjacent bolts can significantly alter joint clamping and load-transfer mechanisms. This study presents a nonlinear finite element assessment of a full ring-flange connection…
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Comparison of Structural Performance of T-Flange Joints Using Different Bolt Grades Under Axial Tensile Loading Conditions
This study investigates the effect of bolt grade on the structural performance of T-flange joints used in wind turbine support structures. A nonlinear finite element model was developed to compare Grade 10.9 and Grade 12.9 bolts under identical loading and boundary conditions. The results showed…
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Investigation of Bolt Grade Influence on the Structural Integrity of L-Type Flange Joints Using Finite Element Analysis
Critical components in support structures for wind turbines, flange joints, are fundamental to ensure the structural integrity of mechanical assemblies under varying operational conditions. This paper investigates the structural performance of L-type flange joints, focusing on the influence of bolt…
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Enhancing mechanical properties of low plasticity soil through coal and silica fume stabilization
Abstract Low-plasticity soils, characterized by low plasticity and high sand content, present challenges in engineering projects due to their inadequate strength and stability. This study evaluates the comparative effects of coal waste and silica fume as stabilizers to improve the mechanical…
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Identification of Potential Nontoxic Human BTK Inhibitors through an Integrated Deep Learning and Structure-Based Drug Repositioning Strategy
Bruton’s tyrosine kinase (BTK) has been a key player in the pathogenesis of multiple autoimmune diseases as its overexpression drives the hyperactivation of the B-cell signaling pathway. While the BTK inhibitors, including ibrutinib, have shown significant inhibitory potential, their low potency…
Also available at: DOAJ
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Spontaneous Splenic Rupture Following Severe Cough in a Patient With Community-Acquired Pneumonia: A Case Report
We describe a rare case involving the spontaneous rupture of the spleen in a man in his mid-70s who initially came to the emergency department with progressively worsening shortness of breath, a productive cough with yellow-green sputum, and chest pain worsened by breathing. He was initially…
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A novel AI-based CNN model to predict the structural performance of monopile used for offshore wind energy systems
This study builds an AI-based Convolutional Neural Network (CNN) model to guess 50-year extreme wind and wave conditions and assess structural loads on the monopile foundation of the NREL 15 MW offshore wind turbine. The model was trained and validated by means of 7 years of measured wind and wave…
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Journal Article
Experimental investigation of eggshell powder and quarry dust for stabilizing subgrade soil
Abstract This study investigates the potential of using eggshell powder and quarry dust as alternative stabilizing agents for improving the engineering properties of lean clay soil. The objective is to develop a sustainable and cost-effective solution for subgrade enhancement in road construction…
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Journal Article
Reliability and sustainability of offshore wind turbine support structures in marine environments: a comprehensive review of failures, monitoring technologies, robotics, and predictive O&M
Offshore wind turbine support structures are increasingly required to operate in deeper and more demanding marine environments, where cyclic loading, hydrodynamic forcing, corrosion, scour, soil-structure interaction, and limited long-term monitoring continue to challenge structural reliability and…
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A Review of Wind Turbine Reliability and Long-Term Performance: Failure Mechanisms, Monitoring Strategies, and AI-Enabled Predictive Maintenance
Wind turbines are increasingly deployed at larger scales and in harsher operating environments, leading to greater structural complexity, stronger load variability, and higher maintenance demands across both drivetrain and structural components. Reported field data indicate that gearboxes and…
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Structural Load Optimization of 15 MW Offshore Wind Turbine Using LHS-Based Design Space
The structural integrity of next-generation offshore wind turbines is highly sensitive to inflow variability, yet current standards often simplify wind conditions without capturing their combined effects on dynamic loads. To address this, we analyzed the NREL IEA 15 MW offshore wind turbine using…
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Dynamic Structural Behavior of Monopile Support Structure for 15 MW Offshore Wind Turbine During Different Phases of Operation
The structural integrity of offshore wind turbine monopiles is critical for ensuring operational stability and long-term performance under varying environmental and aerodynamic loads. However, transient load conditions during different operational phases, such as start, normal stop, and emergency…
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Bilateral Facial Nerve Palsy Revealing Diffuse Large B-Cell Lymphoma With Leptomeningeal Involvement
We present a diagnostically challenging case of a 54-year-old woman who developed progressive bilateral lower motor neuron (LMN) facial nerve palsy, later accompanied by lower limb weakness and impaired dexterity. The initial presentation was misattributed to idiopathic Bell’s palsy, which delayed…
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State of knowledge and future needs for mitigating flood risk of masonry structural systems
Masonry comprises roughly 20% of the building stock in hurricane-prone regions of the southeastern United States, where storm surge and wave action expose these structures to severe flood hazards and impose substantial losses on coastal communities. Current masonry standards and provisions contain…
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A Review of Islanding Detection Techniques for Inverter-Based Distributed Generation
The classical problem of islanding detection in distributed generation falls into the commonly used categories known as passive, active, and hybrid techniques. These approaches vary in terms of their accuracy, security, and dependability. Detecting islanding in modern inverter-based distribution…