1. A Foreword to “Formal Series and Distributions” by C. Ribeiro Braga and M. Schönberg

   • Alberto Saa

   Foreword 09 July 2021 Pages: 1275 - 1275

2. Formal Series and Distributions

   • Carmen Lys Ribeiro Braga
   • Mario Schönberg

   Classic Paper 01 July 2021 Pages: 1276 - 1289

3. Modulational Instability of Dust Acoustic Waves in an Opposite Polarity Dusty Plasma in the Presence of Generalized Polarization Force with Superthermal Electrons and Ions

   • Mahmood A. H. Khaled
   • Mohmed A. Shukri
   • Amr A. Al-Shaibani

   General and Applied Physics 30 June 2021 Pages: 1290 - 1302

   

4. Design and Verification of Novel Low-Profile Miniaturized Pattern and Frequency Tunable Microstrip Patch Antenna Using Two PIN Diodes

   • Sunil P. Lavadiya
   • Vishal Sorathiya
   • Ahmed Nabih Zaki Rashed

   General and Applied Physics 02 August 2021 Pages: 1303 - 1313

   

5. Graphene-Au-Coated Plasmonic Sensor Based on D-Shaped Bezier Polygonal Hollow Core Photonic Crystal Fiber

   • J. Divya
   • S. Selvendran
   • A. Sivasubramanian

   General and Applied Physics 04 August 2021 Pages: 1314 - 1323

   

6. Some Problems with the Dirac Delta Function: Divergent Series in Physics

   • Marcos Amaku
   • Francisco A. B. Coutinho
   • Eduardo Massad

   General and Applied Physics 02 July 2021 Pages: 1324 - 1332

7. Dynamic Analysis and Synchronization for a System with Hyperchaotic Behavior

   • Hilson H. Daũm
   • Rodrigo T. Rocha
   • Angelo M. Tusset

   General and Applied Physics 21 June 2021 Pages: 1333 - 1345

   

8. The Effects of the Dust Size Distribution and the Dust Charging on Shock Waves in Dusty Plasma

   • Xue-Qiang Gou
   • Ke-Hui An
   • Wen-Shan Duan

   General and Applied Physics 27 July 2021 Pages: 1346 - 1354

   

9. Ion Acoustic Shock Wave Excitations Around the Critical Values in an Unmagnetized Pair–Ion Plasma

   • P. Akter
   • M. G. Hafez
   • M. S. Alam

   General and Applied Physics 01 July 2021 Pages: 1355 - 1363

   

10. Particle Production in Higher-Dimensional Universe with Time-Dependent \(\Lambda\) and G

    • S. Surendra Singh
    • S. Kiranmala Chanu

    Particles and Fields 20 July 2021 Pages: 1364 - 1370

    

11. Hybrid Charged Stellar Model Via Embedding and Gravitational Decoupling

    • Satyanarayana Gedela
    • Neeraj Pant
    • Megandhren Govender

    Particles and Fields 25 June 2021 Pages: 1371 - 1405

    

12. Newly Born Extragalactic Millisecond Pulsars as Efficient Emitters of PeV Neutrinos

    • Rajat K. Dey
    • Animesh Basak
    • Tamal Sarkar

    Particles and Fields 22 July 2021 Pages: 1406 - 1415

13. Entrainment of a Van der Pol-Type Circadian Pacemaker to Daylight Cycle

    • F. L. Tsafack Tayong
    • R. Yamapi
    • G. Filatrella

    Condensed Matter 02 July 2021 Pages: 1416 - 1427

    

14. Optical Properties on the Ferroelectric Perovskite Materials: a Study for Photovoltaic Applications

    • C. Stimer
    • V. A. de Oliveira
    • P. P. González-Borrero

    Condensed Matter 15 July 2021 Pages: 1428 - 1437

    

15. Structural, Dielectric, and Impedance Analysis of (Dy, Cu) Co-doped BiFeO₃

    • A. Sathiya Priya
    • D. Geetha
    • I. B. Shameem Banu

    Condensed Matter 21 July 2021 Pages: 1438 - 1447

    

16. Dynamic Behavior of Pacemaker Models Subjected to a Arterial Pressure Excitation Simulator: Theoretical and Experimental Study by Microcontroller

    • R. F. Fonkou
    • Patrick Louodop
    • P. Woafo

    Condensed Matter 05 August 2021 Pages: 1448 - 1458

    

17. Dye-Sensitized Solar Cells Using a Cocktail of Synthetic (Eosin Y) and Natural (Beetroot, Pomegranate, and Kumkum) Dyes

    • Ruba N
    • Sowmya S
    • Nagamani Prabu A

    Condensed Matter 06 August 2021 Pages: 1459 - 1465

    

18. Optimization of Modified Quantum Discord in Projector Space

    • Chitradeep Gupta

    Atomic Physics 28 July 2021 Pages: 1466 - 1471

    

19. Exploring the Parameter-Space of a Generalized Four-dimensional Rössler System

    • Bruna B. T. Francisco
    • Paulo C. Rech

    Statistical 30 July 2021 Pages: 1472 - 1477

    

20. Half-Shell T-Matrix for α-p and α-¹²C Scattering

    • P. Sahoo
    • U. Laha
    • A. K. Behera

    Nuclear Physics 28 June 2021 Pages: 1478 - 1489