Expression of concern: Performance and emissions of gas turbine engines fueled with Karanja oil-based biofuel blends: a machine learning approach using Lasso regression

The publisher of Aircraft Engineering and Aerospace Technology is issuing an Expression of Concern for the following article Aldehim, G., Allafi, R., Alkharashi, A., A., S.F.B., J., V., A., S.B., M.C., S. and Velusamy, P. (2025), “Performance and emissions of gas turbine engines fueled with Karanja oil-based biofuel blends: a machine learning approach using Lasso regression,” Aircraft Engineering and Aerospace Technology, Vol. ahead-of-print No. ahead-of-print. Link to Performance and emissions of gas turbine engines fueled with karanja oil-based biofuel blends: a machine learning approach using Lasso regressionLink to the cited article, which was submitted to the guest-edited special issue “AI Applications in High-Speed Aerospace Propulsion Systems,” to inform readers that concerns have been raised regarding its authorship. This special issue has subsequently been canceled. An investigation by the publisher found a number of articles with multiple concerns, including but not limited to lack of suitability for the scope of the journal and special issue, evidence of third-party involvement, and the inclusion of irrelevant citations. The following citations have been identified as anomalous and inappropriate; the authors were unable to provide sufficient justification for their presence in the article: Ding, F., Wang, R., Zhang, T., Zheng, G., Wu, Z. and Wang, S. (2024a), “Real-time trajectory planning and racking control of bionic underwater robot in dynamic environment,” Cyborg and Bionic Systems, Vol. 5, p. 112, doi:10.34133/cbsystems.0112. Ding, F., Zhu, K., Liu, J., Peng, C., Wang, Y. and Lu, J. (2024 b), “Adaptive memory Event-Triggered output feedback Finite-Time Lane-Keeping control for autonomous heavy truck with roll prevention,” IEEE Transactions on Fuzzy Systems, Vol. 32 No. 12, pp. 6607–6621, doi:10.1109/TFUZZ.2024.3454344. Ding, S., Liu, C., Fan, Z. and Hang, J. (2025), “Lumped parameter Adaptation-Based automatic MTPA control for IPMSM drives by using stator current impulse response,” IEEE Transactions on Energy Conversion, pp.1–11, doi:10.1109/TEC.2025.3550193. Ganapathy, G.P., Alagu, A., Ramachandran, S., Panneerselvam, A.S., Vimal Arokiaraj, G.G., Panneerselvam, M., Panneerselvam, B., Sivakumar, V. and Bidorn, B. (2023), “Effects of fly ash and silica fume on alkalinity, strength and planting characteristics of vegetation porous concrete,” Journal of Materials Research and Technology, Vol. 24, pp. 5347–5360. Guo, J., Li, Y., Huang, B., Ding, L., Gao, H. and Zhong, M. (2024), “An online optimization escape entrapment strategy for planetary rovers based on Bayesian optimization,” Journal of Field Robotics, Vol. 41 No. 8, pp. 2518–2529, doi: 10.1002/rob.22361. Li, D., Tong, S., Yang, H. and Hu, Q. (2024), “TimeSynchronized control for spacecraft reorientation with TimeVarying constraints”, IEEE/ASME Transactions on Mechatronics, pp. 1–11, doi: 10.1109/TMECH.2024.3430953. Liu, Y., Li, X., Ge, L. and Zhang, Z. (2024 b), “Ultra largeArea stitch less scanning probe lithography and In situ characterization system using a compliant nanomanipulator,” IEEE/ASME Transactions on Mechatronics, Vol. 29 No. 2, pp. 924–935, doi: 10.1109/TMECH.2023.3323385. Varuthaiya, M., Palanisamy, C., Sivakumar, V. and Pushpanathan, G. (2022), “Concrete with sisal fibered geopolymer: a behavioral study,” Journal of Ceramic Processing Research, Vol. 23 No. 6, pp. 912–919. Wang, X., Guo, S., Xu, Z., Zhang, Z., Sun, Z. and Xu, Y. (2024), “A robotic teleoperation system enhanced by augmented reality for natural human–robot interaction,” Cyborg and Bionic Systems, Vol. 5, p. 98, doi: 10.34133/cbsystems.0098. Xu, Y., Ju, K. and Zhang, C. (2024), “A Wrist-Inspired Magneto-Pneumatic Hybrid-Driven soft actuator with bidirectional torsion,” Cyborg and Bionic Systems, Vol. 5, p. 111, doi:10.34133/cbsystems.0111. An investigation is ongoing and is currently unresolved. Further information will be provided by Aircraft Engineering and Aerospace Technology as it becomes available. The publisher of the journal sincerely apologizes to the readers of this article.