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• Prediction of postoperative acute kidney injury after cardiopulmonary bypass cardiac surgery: The role of preoperative inflammatory indices and intraoperative perfusion stress
  Mehmet Akif Yilmaz, Mehmet Zubeyir Guney, Nuray Uzun, Hasan Emre Kivanc, Ebubekir Sonmez, Muhammed Enes Aydin
  Challenge Journal of Perioperative Medicine (2026) 4(1) 21-31
  Background: Postoperative acute kidney injury is a frequent complication after cardiac surgery performed with cardiopulmonary bypass and is closely associated with increased mortality. This study aimed to evaluate the predictive value of preoperative renal fun...
• Variations in CFD simulations of wind loading on building structures
  Lyubomir A. Zdravkov
  Challenge Journal of Structural Mechanics (2026) 12(2) 115-124
  Relevant standards for wind loading provide information about wind loads on a small number of standardized building shapes. However, when designing a uniquely shaped structure, two main approaches are possible – either test the structure in a wind tunnel or pe...
• Calcium aluminate cement based high early strength engineered cementitious composites with recycled artificial flaws
  Ahmed Latif Kadhim, Süleyman Bahadır Keskin
  Challenge Journal of Concrete Research Letters (2024) 15(4) 120-133
  Engineered Cementitious Composites (ECC) is an ideal repair material due to its high durability and ductility. However, providing ECC with high early strength is challenging since strength and ductility, which are key to crack-free repair, are also interdepend...
• Influence of nano-modification on mechanical and durability properties of cement polymer anticorrosive coating
  Shoib Bashir Wani, Junaid Ahmed, M. S. Haji Sheik Mohammed, Tahir Hussain Muntazari, Nusrat Rafique
  Challenge Journal of Concrete Research Letters (2020) 11(4) 92-104
  In the present study performance evaluation of nano-modified cement polymer anticorrosive coating (CPAC) was undertaken by conducting the Chemical Resistance Test (CRT), Applied Voltage Test (AVT), Bond Strength Test (BST), Accelerated Corrosion Test (ACT) and...
• Standardization the effect of shape of aggregates with respect to compressive strength of concrete
  Md. Shafiqul Islam, Md. Abul Kalam Azad, Arup Ratan Sarker
  Challenge Journal of Concrete Research Letters (2018) 9(1) 1-9
  It is proved that aggregate’s types have the severe effect on physicomechanical properties of concrete as aggregate covered almost 70 to 80 percent of the total volume of concrete. The effect of Flaky and Elongated aggregates on strength, durability, and worka...