Announcements

1. “Probing the Nuclear Equation of State from the Existence of a ∼2.6 M⊙ Neutron Star: The GW190814 Puzzle”
by Alkiviadis Kanakis-Pegios et al.
Symmetry 2021, 13(2), 183
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/2/183 

2. “Lorentz Symmetry Group, Retardation and Energy Transformations in a Relativistic Engine”
by Shailendra Rajput et al.
Symmetry 2021, 13(3), 420
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/3/420 

3. “Fluctuation–Dissipation Relations in Active Matter Systems”
by Lorenzo Caprini et al.
Symmetry 2021, 13(1), 81
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/1/81 

4. “Spontaneous and Stimulated Undulator Radiation in Symmetric and Asymmetric Multi-Periodic Magnetic Fields”
by Konstantin Zhukovsky et al.
Symmetry 2021, 13(1), 135
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/1/135 

5. “A Modern View of the Equation of State in Nuclear and Neutron Star Matter”
by G. Fiorella Burgio et al.
Symmetry 2021, 13(3), 400
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/3/400 

6. “Scalarized Nutty Wormholes”
by Rustam Ibadov et al.
Symmetry 2021, 13(1), 89
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/1/89 

7. “Nucleon Structure and Spin Effects in Elastic Hadron Scattering”
by Oleg Selyugin
Symmetry 2021, 13(2), 164
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/2/164

8. “Electron Symmetry Breaking during Attosecond Charge Migration Induced by Laser Pulses: Point Group Analyses for Quantum Dynamics”
by Dietrich Haase et al.
Symmetry 2021, 13(2), 205
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/2/205 

9. “Historical Introduction to Chiral Quark Models”
by Francisco Fernández et al.
Symmetry 2021, 13(2), 252
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/2/252

10. “Coupling Hadron-Hadron Thresholds within a Chiral Quark Model Approach”
by Pablo G. Ortega et al.
Symmetry 2021, 13(2), 279
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/2/279

11. “Siberian Snakes, Figure-8 and Spin Transparency Techniques for High Precision Experiments with Polarized Hadron Beams in Colliders”
by Yaroslav S. Derbenev et al.
Symmetry 2021, 13(3), 398
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/3/398

12. “Power Law Duality in Classical and Quantum Mechanics”
by Akira Inomata et al.
Symmetry 2021, 13(3), 409
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/3/409

13. “Connecting in the Dirac Equation the Clifford Algebra of Lorentz Invariance with the Lie Algebra of SU(N) Gauge Symmetry”
by Eckart Marsch et al.
Symmetry 2021, 13(3), 475
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/3/475

14. “What Is the Size and Shape of a Wave Packet?”
by Larry S. Schulman
Symmetry 2021, 13(4), 527
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/4/527 

15. “Gravity with Explicit Diffeomorphism Breaking”
by Robert Bluhm et al.
Symmetry 2021, 13(4), 660
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/4/660

16. “Improved Bounds on Lorentz Symmetry Violation from High-Energy Astrophysical Sources”
by Brett Altschul
Symmetry 2021, 13(4), 688
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/4/688

17. “Radiative and Meson Decays of Y(4230) in Flavor SU(3)”
by Luciano Maiani et al.
Symmetry 2021, 13(5), 751
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/5/751

18. “Protein Helical Structures: Defining Handedness and Localization Features”
by Alla E. Sidorova et al.
Symmetry 2021, 13(5), 879
Available online: https://0-www-mdpi-com.brum.beds.ac.uk/2073-8994/13/5/879