1. “Assessment of an Improved Three-Diode against Modified Two-Diode Patterns of MCS Solar Cells Associated with Soft Parameter Estimation Paradigms”
by Bayoumi, A.; El-Sehiemy, R.; Mahmoud, K.; Lehtonen, M.; Darwish, M.
Appl. Sci. 2021, 11(3), 1055; https://doi.org/10.3390/app11031055
Available online: https://www.mdpi.com/2076-3417/11/3/1055

2. “Real-Time Extensive Livestock Monitoring Using LPWAN Smart Wearable and Infrastructure”
by Casas, R.; Hermosa, A.; Marco, Á.; Blanco, T.; Zarazaga-Soria, F.
Appl. Sci. 2021, 11(3), 1240; https://doi.org/10.3390/app11031240
Available online: https://www.mdpi.com/2076-3417/11/3/1240

3. “A Novel Automatic Modulation Classification Method Using Attention Mechanism and Hybrid Parallel Neural Network”
by Zhang, R.; Yin, Z.; Wu, Z.; Zhou, S.
Appl. Sci. 2021, 11(3), 1327; https://doi.org/10.3390/app11031327
Available online: https://www.mdpi.com/2076-3417/11/3/1327

4. “Crowded Space: A Review on Radar Measurements for Space Debris Monitoring and Tracking”
by Muntoni, G.; Montisci, G.; Pisanu, T.; Andronico, P.; Valente, G.
Appl. Sci. 2021, 11(4), 1364; https://doi.org/10.3390/app11041364
Available online: https://www.mdpi.com/2076-3417/11/4/1364

5. “Metamaterial Based Design of Compact UWB/MIMO Monopoles Antenna with Characteristic Mode Analysis”
by Jabire, A.; Ghaffar, A.; Li, X.; Abdu, A.; Saminu, S.; Alibakhshikenari, M.; Falcone, F.; Limiti, E.
Appl. Sci. 2021, 11(4), 1542; https://doi.org/10.3390/app11041542
Available online: https://www.mdpi.com/2076-3417/11/4/1542

6. “Machine Learning for Design Optimization of Electromagnetic Devices: Recent Developments and Future Directions”
by Li, Y.; Lei, G.; Bramerdorfer, G.; Peng, S.; Sun, X.; Zhu, J.
Appl. Sci. 2021, 11(4), 1627; https://doi.org/10.3390/app11041627
Available online: https://www.mdpi.com/2076-3417/11/4/1627

7. “Design and Realization of a Frequency Reconfigurable Multimode Antenna for ISM, 5G-Sub-6-GHz, and S-Band Applications”
by Ghaffar, A.; Li, X.; Awan, W.; Iffat Naqvi, S.; Hussain, N.; Seet, B.; Alibakhshikenari, M.; Falcone, F.; Limiti, E.
Appl. Sci. 2021, 11(4), 1635; https://doi.org/10.3390/app11041635
Available online: https://www.mdpi.com/2076-3417/11/4/1635

8. “Time-Dependent Performance of a Multi-Hop Software Defined Network”
by Czachórski, T.; Gelenbe, E.; Kuaban, G.; Marek, D.
Appl. Sci. 2021, 11(6), 2469; https://doi.org/10.3390/app11062469
Available online: https://www.mdpi.com/2076-3417/11/6/2469

9. “Interpretation of Frequency Response Analysis for Fault Detection in Power Transformers”
by Al-Ameri, S.; Kamarudin, M.; Yousof, M.; Salem, A.; Siada, A.; Mosaad, M.
Appl. Sci. 2021, 11(7), 2923; https://doi.org/10.3390/app11072923
Available online: https://www.mdpi.com/2076-3417/11/7/2923

10. “Digital Twins Collaboration for Automatic Erratic Operational Data Detection in Industry 4.0”
by Sahal, R.; Alsamhi, S.; Breslin, J.; Brown, K.; Ali, M.
Appl. Sci. 2021, 11(7), 3186; https://doi.org/10.3390/app11073186
Available online: https://www.mdpi.com/2076-3417/11/7/3186

11. “Renewable Generation and Transmission Expansion Planning Coordination with Energy Storage System: A Flexibility Point of View”
by Ansari, M.; Pirouzi, S.; Kazemi, M.; Naderipour, A.; Benbouzid, M.
Appl. Sci. 2021, 11(8), 3303; https://doi.org/10.3390/app11083303
Available online: https://www.mdpi.com/2076-3417/11/8/3303

12. “True Random Number Generator Based on Fibonacci-Galois Ring Oscillators for FPGA”
by Nannipieri, P.; Di Matteo, S.; Baldanzi, L.; Crocetti, L.; Belli, J.; Fanucci, L.; Saponara, S.
Appl. Sci. 2021, 11(8), 3330; https://doi.org/10.3390/app11083330
Available online: https://www.mdpi.com/2076-3417/11/8/3330

13. “Power-Ordered NOMA with Massive MIMO for 5G Systems”
by Marques da Silva, M.; Dinis, R.
Appl. Sci. 2021, 11(8), 3541; https://doi.org/10.3390/app11083541
Available online: https://www.mdpi.com/2076-3417/11/8/3541

14. “In Situ Assessment of 5G NR Massive MIMO Base Station Exposure in a Commercial Network in Bern, Switzerland”
by Aerts, S.; Deprez, K.; Colombi, D.; Van den Bossche, M.; Verloock, L.; Martens, L.; Törnevik, C.; Joseph, W.
Appl. Sci. 2021, 11(8), 3592; https://doi.org/10.3390/app11083592
Available online: https://www.mdpi.com/2076-3417/11/8/3592

15. “Sizing and Sitting of DERs in Active Distribution Networks Incorporating Load Prevailing Uncertainties Using Probabilistic Approaches”
by Nematollahi, A.; Shahinzadeh, H.; Nafisi, H.; Vahidi, B.; Amirat, Y.; Benbouzid, M.
Appl. Sci. 2021, 11(9), 4156; https://doi.org/10.3390/app11094156
Available online: https://www.mdpi.com/2076-3417/11/9/4156

16. “A Self-Optimizing Technique Based on Vertical Handover for Load Balancing in Heterogeneous Wireless Networks Using Big Data Analytics”
by Beshley, M.; Kryvinska, N.; Yaremko, O.; Beshley, H.
Appl. Sci. 2021, 11(11), 4737; https://doi.org/10.3390/app11114737
Available online: https://www.mdpi.com/2076-3417/11/11/4737

17. “Parametric Analysis of the Edge Capacitance of Uniform Slots and Application to Frequency-Variation Permittivity Sensors”
by Muñoz-Enano, J.; Martel, J.; Vélez, P.; Medina, F.; Su, L.; Martín, F.
Appl. Sci. 2021, 11(15), 7000; https://doi.org/10.3390/app11157000
Available online: https://www.mdpi.com/2076-3417/11/15/7000

18. “Microwave Planar Resonant Solutions for Glucose Concentration Sensing: A Systematic Review”
by Juan, C.; Potelon, B.; Quendo, C.; Bronchalo, E.
Appl. Sci. 2021, 11(15), 7018; https://doi.org/10.3390/app11157018
Available online: https://www.mdpi.com/2076-3417/11/15/7018

19. “Cyclostationary Crosstalk Cancelation in High-Speed Transmission Lines”
by Kuznetsov, Y.; Baev, A.; Konovalyuk, M.; Gorbunova, A.
Appl. Sci. 2021, 11(17), 7988; https://doi.org/10.3390/app11177988
Available online: https://www.mdpi.com/2076-3417/11/17/7988

20. “Dynamic Correction of the Influence of Long Measuring Path Irregularity in Antenna Tests”
by Dobychina, E.; Snastin, M.
Appl. Sci. 2021, 11(17), 8183; https://doi.org/10.3390/app11178183
Available online: https://www.mdpi.com/2076-3417/11/17/8183