EPJ ST Special Issue: The Dynamics of the Covid-19 Pandemic - Nonlinear approaches on the modelling, prediction and control
- Published on 04 June 2021
This special issue is devoted to articles which propose mathematical models of the spread of the novel coronavirus and its effect in future waves. Especially those timely, should play a key role in informing evidence-based decisions on public health, society, industry, economics, and technology by policymakers.
In this special issue, we intend to invite front-line researchers and authors to submit original research articles and short reviews on the dynamics of the novel corona virus based on physics and mathematical approaches. The selected manuscripts should have approaches related to nonlinear dynamics.
EPJ ST Special Issue: Advances in Low-Dimensional and Nanostructured Materials for Sustainable Energy Conversion and Storage
- Published on 05 May 2021
The prolific growth in global energy demand together with increasing concerns over environmental pollution requires urgent solutions to efficiently harvest and store renewable energy resources. Toward realizing this, a significant amount of research has been devoted in recent years to the discovery of innovative functional materials with high performance for applications in energy conversion and storage. In particular, a wide range of novel low-dimensional and nanostructured materials have been reported achieving greatly improved performances. This special issue is dedicated to the latest advancements in low-dimensional and nanostructured materials for energy applications with an emphasis on reporting new knowledge at the interface of physics and chemistry.
- Published on 23 April 2021
Submissions are invited for a Special Issue of EPJ ST on “Complex Urban Systems”.
The rapid trend of urbanization that will see 68% of the world’s population living in cities by 2050 poses numerous challenges to our cities and to the local governments that bear responsibility for addressing the needs of its citizens. Science and technology play a key role in helping us increase our understanding of urban processes and in solving complex urban problems, such as facilitating the reliable transportation of people and goods, securing availability of electrical power and water that meet the needs of the growing population and related waste disposal needs, ensuring the health and wellness of urban populations (in particular of older adults and people with disabilities), making our cities more accessible and inclusive, preparing for the expected waves of migration due to environmental change, and supporting local governments to be more responsive to the needs of the citizens they serve. None of these challenges can be addressed in isolation: urban environments represent complex, intertwined social-economic-technical-environmental systems that require new inter-/cross-disciplinary approaches for scientific research and the development of technological solutions.
EPJ ST Special Issue: Frontiers of Fractals for Complex Systems: Recent Advances and Future Challenges
- Published on 23 March 2021
The fractal theory has been born which aims to understand complexity and provide an innovative way to recognize irregularity and complex systems. The idea of fractals enables us to see a certain symmetry and order even in an otherwise seemingly disordered and complex system. The importance of the discovery of fractals can hardly be exaggerated. Since its discovery there has been a surge of research activities in using this powerful concept in almost every branch of scientific disciplines to gain deep insights into many unresolved problems. A large number of applications dealing with the fractal geometry of things as diverse as the price changes and salary distributions, turbulence, statistics of error in telephone message, word frequencies in written texts, in aggregation and fragmentation processes are just to name a few.
- Published on 26 February 2021
The 100th birthday of Professor Yoichiro Nambu, who was awarded the Nobel Prize for Physics in 2008, was on 18th January 2021. Professor Nambu was one of the most influential theoretical physicists of the twentieth century. His deep and unexpected insights often took years for others to understand and fully appreciate. They include spontaneous symmetry breaking, for which he was awarded half of the 2008 Nobel Prize in Physics; Nambu Mechanics; the theory of quarks and gluons, and string theory.
We would like to commemorate this landmark birthday with a special issue of EPJST entitled Symmetry, Dynamics and Strings: A Centennial Issue in Honor of Yoichiro Nambu. We invite contributions to this issue of articles that are inspired by his seminal and panoramic work. Besides particle physics, contributions from other disciplines in which he worked such as spontaneous symmetry breaking are encouraged. Short reviews may also be submitted.
EPJ ST Special Issue: Current Trends in Computational and Experimental Techniques in Nonlinear Dynamics
- Published on 26 February 2021
This EPJ ST Issue is concerned with state-of-the-art techniques and its applications in experimental and computational studies of Nonlinear Dynamics. The ubiquity of nonlinearity in nature allows for a broad, constructive and practical perspective on systems as diverse as coupled mechanical oscillators, n-body systems, optical devices, chemical reactions, to name just a few active traditional fields, as well as new exciting areas made at the interfaces between multiple traditional fields, such as biophysics.
The tools of Nonlinear Dynamics, where dynamical systems and its applications are at its core, can provide deep insight into essential phenomena in diverse models and experiments.
The special issue is therefore devoted to emphasize the relevance, scope and usefulness of these techniques in tackling with current problems of physical and practical significance.
- Published on 03 February 2021
This special issue is devoted to the experimental, theoretical as well as computational studies of fundamental features in transport phenomena, structural and phase transitions in various soft and disordered systems (polymers, colloids, glasses, amorphous, crystalline, and composite materials) involved in macroscopically non-equilibrium processes (hydrodynamic flows; non-stationary deformations, heat and mass transfer and generation). Special attention is focused on a detailed microscopical study of the effects of internal structural and phase transformations on macroscopic physical properties and phenomena in the systems under study.
- Published on 11 January 2021
Neural networks have an inevitable effect on world life. The role of neural networks can be observed in various subjects of sciences and engineering including associative memory, image processing, solving linear and nonlinear programming, computing technology and so forth. It has been demonstrated that if the parameters of networks are appropriately chosen, the neural networks can show chaotic behaviors and complicated dynamics. As it is obvious, due to the broadband application of chaotic neural networks as well as their random-like behavior, the development of novel methods, new models, and extending the existing techniques for analysis of these systems is of crucial importance, and more studies must be carried out in this field of study.
- Published on 07 October 2020
Nature is full of nonlinearities that are responsible for a great variety of responses and, in some sense, define biodiversity characteristics. In this regard, a nonlinear dynamics perspective is of special interest for a proper understanding of natural rhythms that can represent the most striking manifestations of natural and biological system behaviors. Natural rhythms can be either periodic or irregular over time and space and each kind of dynamical behavior may be related to both normal and pathological functioning.
Nonlinear dynamics of biological systems have been investigated considering different approaches and perspectives, focused on different purposes. Accordingly, investigations can be related to the general comprehension of physiological functioning, pathologies, control and biomedical engineering applications. In this regard, it is of special importance the investigation of biological rhythms employing a nonlinear dynamics perspective.
Modeling, numerical and experimental approaches are all employed in the analysis of complex biological rhythms. We invite researchers to contribute original articles to the Special Issue Complex Bio Rhythms to show continuing efforts to understand nonlinear systems such as biological and biomedical systems, biomechanics and general natural systems. Distinct aspects as modeling, bifurcations, synchronization, control, parameter estimation and engineering applications are of interest.
- Published on 24 January 2020
Interaction of intense laser pulses with matter on various scales is a growing area of research using table-top femtosecond and sub-femtosecond laser pulses as well as large-scale free electron lasers spanning the photon energy range from the infrared to x-rays. The Nobel prize in Physics (2018) was awarded in part to the development of “light tools” or lasers delivering intense near-infrared laser pulses. This has burgeoned research in intense laser matter interaction to develop attosecond pulses in the soft x-ray region to super-intense pulses to generate relativistic plasmas. The large scale end of this research saw a concomitant development in accelerator based photon sources of intense short wavelength light pulses VUV, soft- and hard x-rays from free-electron laser pulses. This science has grown rapidly in the last few decades and calls for a review and a collection to gather its length and breadth.