EPJ ST Special Issue Celestial Mechanics: new discoveries and challenges for space exploration
- Published on 13 March 2023
Guest Editors: Cristiano F. de Melo, Maria Cecília Zanardi, Pryscilla Maria P. Santos, Silvia Maria Giuliatti-Winter
Since the launch of the first artificial satellite in 1957, more than 13,700 satellites have been put in orbit around the Earth; 8261 were in orbit in December 2022 (4852 in operation) providing global communication, earth science and observation, global navigation and other purposes. In addition, with the interplanetary exploration by robotic probes and the space telescopes much has been learned about the objects of our Solar System and beyond. Such great advances in knowledge are due to new discoveries and technologies that have enabled the development of new propulsion systems, more efficient space navigation methods, mega satellite constellations, improvements in the accuracy of observations, and advances in theoretical methods and numerical computational techniques. All these together have helped to expand the knowledge about the planetary systems, including our Solar System. Following this line, the aim of this special issue is to bring together works in theoretical and applied Celestial Mechanics based on recent researches and discoveries to address the challenges of current space exploration encompassing, but not limited to
EPJ ST Special Issue: Application of Fractional-Calculus in Physical Systems
- Published on 12 December 2022
Editors: Salah Boulaaras, Rashid Jan and Viet-Thanh Pham
It is well-known that fractional-calculus has numerous applications in engineering, science and technology. The dynamics of challenging physical systems are closely connected to fractional calculus. Due to their non-local nature, fractional operators can more accurately and systematically represent a variety of natural phenomena. Fractional order differential equations may correctly control a wide variety of mathematical and physical models. It follows that the conclusions for the fractional mathematical model are more accurate and broad since the classical models are specific examples of the fractional order mathematical models. Fractional calculus also offers a number of techniques for resolving nonlinear models, integro-differential equations, and differential, integral, and integral-differential equations in mathematical physics. Fractional calculus on the complex plane has received a lot of attention in the last 10 years. The connection between fractional calculus and other mathematical and physical disciplines may open up new study directions and lead to new discoveries and applications.
EPJ ST Special Issue: Molecular and Cellular Mechanics
- Published on 03 October 2022
Editors: Dechang Li and Baohua Ji
Molecular and cellular mechanics is a fundamental field for understanding the physiology and pathology of biological systems at nano- and microscale. It is widely recognized that cell behaviors highly depend on its microenvironment, including extracellular matrix and neighboring cells. One can regulate cell behaviors such as migration, differentiation, proliferation and immunity, etc., through modulating the cell-cell and cell-matrix interactions. A quantitative study of the biophysical mechanisms underlying the cellular behaviors will contribute to the understanding of the pathogenesis and development of diseases, such as tumors, cardiovascular disease, neurodegenerative disease, etc.
EPJ ST Special Issue: Machine Learning for quantum many-body systems
- Published on 22 August 2022
Editors: Roberta Citro and Morten Hjorth-Jensen
This special topic will cover different aspects of machine learning for the description of quantum many-body physics systems from both solid state, statistical mechanics and computer science. Machine learning will be discussed as a complementary method to current computational techniques for many-body systems, including Monte Carlo and tensor networks, as well as methods to analyze "big data" generated in experiments.