A simulated investigation of the impact of H2/NH3/diesel blends on engine performance and exhaust emissions using 5% EGR Javad Zareei, Younus Fahad Breesam, A.K. Kareem, Normurot Fayzullaev, Ekaterina Diakina, Ibrahim H. Al-Kharsan, Chou-Yi Hsu, John William Grimaldo Guerrero Fuel Processing Technology, 2026 • Hydrogen enhances combustion efficiency, peak pressures, and temperature significantly. • Hydrogen-rich blends improve heat transfer and temperature profiles. • Study compares hydrogen, ammonia, and diesel fuel blends. • EGR lowers peak temperature.
Scale-Dependent Modeling of Thermoelastic Damping in Rectangular Nanoplates Considering Surface Elasticity and Nonlocal Thermal Effects Suleiman Ibrahim Mohammad, Sabir Widatalla, Wan Mohd Hirwani Wan Hussain, Ashutosh Pattanaik, Harjot Singh Gill, Asokan Vasudevan, Pragyan Senapati, J. Jayaprabakar, Mujtaba Z. Ali, A. K. Kareem Mathematical Methods in the Applied Sciences, 2026 In micro/nanoresonators, thermoelastic damping (TED) serves as a principal energy dissipation mechanism that critically determines device performance. The mechanical and thermal responses of these small‐scale structures cannot be captured by traditional formulations and demand scale‐dependent simulations. This research outlines a fresh modeling approach addressing the role of surface effect in TED for rectangular nanoplate resonators subjected to nonlocal dual‐phase‐lag (NDPL) heat conduction. The analysis initiates by developing the governing equations for displacement and temperature in Kirchhoff plates through the application of the surface elasticity theory (SET) and the NDPL heat transfer model. The frequency‐based technique, combined with the derived equations, yields an explicit TED formulation for nanoscale rectangular plates, accounting for the surface effect. The results section, after confirming model accuracy, delivers various numerical evaluations aimed at assessing the impact of scale effects, plate dimensions, boundary types, vibration modes, and material selections. The analysis implies that TED is attenuated under the influence of non‐classical parameters introduced by the SET, in contrast to the higher damping levels predicted by classical elasticity.
Studying the influence of fused deposition modeling parameters on the yield and impact strength of PLA/graphene/clay composite using Taguchi method Paul Rodrigues, Ali Kamil Kareem, Ekaterina Diakina, Shavan Askar, Fadhil Faez Sead, Kottala Sri Yogi, Mohamed A. Diab, Hanan Hassan Ahmed, Zuhair I. Al-Mashhadani, Malik Bader Alazzam Journal of Thermoplastic Composite Materials, 2026 This study aims to fabricate Polylactic acid/Graphene/Clay (PLA/GPN/Clay) composite using the fused deposition modeling (FDM) process and simultaneously improve the yield and impact strength. Hence, Taguchi method and grey relational grade analysis are used to attain the optimal values of GPN content, clay content, print speed and nozzle temperature. SEM, TGA and DSC tests are used to analyze the fabricated samples. The results indicated that the addition of GPN and clay in the PLA led to an enhancement of the thermal stability of PLA/GPN/Clay composite. Taguchi method results also demonstrated that the impact of graphene content and nozzle temperature on the yield and impact strength is more than the other parameters. The grey relational grade analysis also indicated that the impact and yield strength of PLA/GPN/Clay composite were enhanced with a 2 wt% clay content, a 1 wt% graphene content, a 30 mm/s print speed and a 215°C nozzle temperature.
Epidural Gel-Foam Impregnated with Bupivacaine versus Paravertebral Intramuscular Bupivacaine for Postoperative Analgesia in Lumbar Spine Surgery: A Comparative Clinical Trial Peyman Gholipour, Chou-Yi Hsu, Ali Akbar Nasiri, A K Kareem, Abdullah Ali Alzahrani, et al. Archives of Bone and Joint Surgery, 2026 Objectives: This study aimed to compare the effect of epidural gel foam impregnated with bupivacaine and intramuscular paravertebral bupivacaine on analgesia after lumbar spine surgeries. Methods: In this single-blind clinical trial, 60 patients aged 18-65 years who underwent lumbar spine surgery under general anesthesia were randomly assigned to two groups. In the first group, a 1 × 5 cm strip of gel foam impregnated with 70 mg of 0.5% bupivacaine was placed in the epidural space. In contrast, in the second group, 70 mg of 0.5% bupivacaine was injected paravertebrally into the muscle. Pain scores based on the Visual Analogue Scale (VAS), analgesic prescriptions, time to first analgesic request, and total dosage during recovery and at 6, 12, and 24 hours postoperatively were recorded and compared between the groups. Results: No significant difference in average pain scores at different time points (recovery, 6, and 12 hours) was observed between the two groups (P > 0.05). However, at 24 hours postoperatively, a significant difference was found between the groups, with the VAS score in the bupivacaine-impregnated epidural gel foam group being significantly lower than that in the paravertebral intramuscular bupivacaine group (P = 0.04). Conclusion: Bupivacaine-impregnated epidural gel foam and paravertebral intramuscular bupivacaine provide similar analgesia during recovery and at 6 and 12 hours following spinal surgery. However, at 24 hours, the analgesia in the bupivacaine-impregnated epidural gel foam group is superior to that in the paravertebral intramuscular bupivacaine group.
Biodegradable Zinc-Based Alloys for Biomedical Implant Applications: A Review Ayad Abdulrazzaq Mutar, A. K. Kareem, Subasini Uthirapathy, Gaurav Sanghvi, Majid S. Jabir, Ankit Kedia, Shivender Singh, Ambati Vijay Kumar, Abed J. Kadhim, Masoud Soroush Bathaei Transactions of the Indian Institute of Metals, 2026
Electrocatalytic CO2 reduction: surface dynamic effects on conversion efficiency Ali Kamil Kareem, Abdulrahman T. Ahmed, Ebraheem Abdu Musad Saleh, Nusiba M. M. Alshik, Hussein Riyadh Abdul Kareem Al-Hetty, Abhayveer Singh, V. Kavitha, Bhavik Jain, Rajesh Pant, Issa Mohammed Kadhim, Yuipong Yang, Ibrahm A. Mohamad Ionics, 2025
The Effect of Naringenin and Ceftriaxone on a Rat Model of Pyelonephritis Sulieman Ibraheem Shelash Al-Hawary, Zeyad Duraid Najmuldeen, Rosario Mireya Romero-Parra, Shaker Shanawa Al-Hasnawi, Ali Kamil Kareem, Shaymaa Abdulhameed Khudair, Krishanveer Singh, Muataz S. Alhassan, Ahmed Hjazi, Shadia Hamoud Alshahrani Pharmaceutical Chemistry Journal, 2024
Crushing Performances of Kenaf Fibre Reinforce Composite Tubes Muhammad Fadhil Sahrom, Muhamad Khairudin Awang, Mohammad Sukri Mustapa, Al Emran Ismail, Jamiluddin Jaafar, Omar Mohammed Al-Moayed, Ali Kamil Kareem Journal of Advanced Research in Applied Mechanics, 2024
The role of Cu doping in properties of CdZnS thin films K. A. Mohammed, , R. A. Talib, B. Bhavani, N. H. J. Al Hasan, A. Kareem, F. H. Alsultany, R. S. Zabibah, M. A. Alkhafaji, S. Sharma, , , , , , , , and Chalcogenide Letters, 2023
Doping effect on properties of CdZnS nanoparticles Department of Medical Physics, Hilla University College, Babylon, Iraq, K. A. Mohammed, A. M. Ajam, Department of Medical Physics, Hilla University College, Babylon, Iraq, A. Kareem, Department of Medical Physics, Hilla University College, Babylon, Iraq, K. H. Salem, Pharmacy Department , Al-Mustaqbal University College, 51001, Hillah, Babylon, Iraq, M. A. Alkhafaji, College of Engineering Technology, Department of Medical Device Industry Engineering, National University of Science, Technology, Dhi Qar, Iraq, R. S. Zabibah, Medical Laboratory Technology Department , College of Medical Technology, The Islamic University, Najaf, Iraq Chalcogenide Letters, 2023
Influence Coefficients for a single superficial cracked thick cylinder under torsion and bending moments International Journal of Integrated Engineering, 2020