1. “Recent Advances in Acoustics of Transitional Airfoils with Feedback-Loop Interactions: A Review”
by Golubev, V.
Appl. Sci. 2021, 11(3), 1057; https://doi.org/10.3390/app11031057
Available online: https://www.mdpi.com/2076-3417/11/3/1057

2. “Improving the Accuracy of Analytical Relationships for Mechanical Properties of Permeable Metamaterials“
by Hedayati, R.; Ghavidelnia, N.; Sadighi, M.; Bodaghi, M.
Appl. Sci. 2021, 11(3), 1332; https://doi.org/10.3390/app11031332
Available online: https://www.mdpi.com/2076-3417/11/3/1332

3. “Underwater Acoustic Target Recognition with a Residual Network and the Optimized Feature Extraction Method”
by Hong, F.; Liu, C.; Guo, L.; Chen, F.; Feng, H.
Appl. Sci. 2021, 11(4), 1442; https://doi.org/10.3390/app11041442
Available online: https://www.mdpi.com/2076-3417/11/4/1442

4. “Ultrasound Extraction Mediated Recovery of Nutrients and Antioxidant Bioactive Compounds from Phaeodactylum tricornutum Microalgae”
by Khawli, F.; Martí-Quijal, F.; Pallarés, N.; Barba, F.; Ferrer, E.
Appl. Sci. 2021, 11(4), 1701; https://doi.org/10.3390/app11041701
Available online: https://www.mdpi.com/2076-3417/11/4/1701

5. “Monitoring the Hydration Process in Carbon Nanotube Reinforced Cement-Based Composites Using Nonlinear Elastic Waves”
by Tragazikis, I.; Kordatou, T.; Exarchos, D.; Dalla, P.; Matikas, T.
Appl. Sci. 2021, 11(4), 1720; https://doi.org/10.3390/app11041720
Available online: https://www.mdpi.com/2076-3417/11/4/1720

6. “3D Roughness Measurement of Failure Surface in CFA Pile Samples Using Three-Dimensional Laser Scanning”
by Seo, H.
Appl. Sci. 2021, 11(6), 2713; https://doi.org/10.3390/app11062713
Available online: https://www.mdpi.com/2076-3417/11/6/2713

7. “Recent Advancements in Non-Destructive Testing Techniques for Structural Health Monitoring”
by Kot, P.; Muradov, M.; Gkantou, M.; Kamaris, G.; Hashim, K.; Yeboah, D.
Appl. Sci. 2021, 11(6), 2750; https://doi.org/10.3390/app11062750
Available online: https://www.mdpi.com/2076-3417/11/6/2750

8. “Aeroacoustics Assessment of an Hybrid Aircraft Configuration with Rear-Mounted Boundary Layer Ingested Engine”
by Petrosino, F.; Barbarino, M.; Staggat, M.
Appl. Sci. 2021, 11(7), 2936; https://doi.org/10.3390/app11072936
Available online: https://www.mdpi.com/2076-3417/11/7/2936

9. “Detection and Localization of Multiple Damages through Entropy in Information Theory”
by Ceravolo, R.; Civera, M.; Lenticchia, E.; Miraglia, G.; Surace, C.
Appl. Sci. 2021, 11(13), 5773; https://doi.org/10.3390/app11135773
Available online: https://www.mdpi.com/2076-3417/11/13/5773

10. “An Ensemble of Convolutional Neural Networks for Audio Classification”
by Nanni, L.; Maguolo, G.; Brahnam, S.; Paci, M.
Appl. Sci. 2021, 11(13), 5796; https://doi.org/10.3390/app11135796
Available online: https://www.mdpi.com/2076-3417/11/13/5796