2018 Impact factor 2.612

News

EPJ E Highlight - Gap geometry grasped

alt
Illustration of the sphere packing in two dimensions. © M. Maiti et al.

A new algorithm could help understand the structure of liquids, and how they flow through porous media

Theoretical physicist Moumita Maiti and colleagues at the Jawaharlal Nehru Centre for Advanced Scientific Research in Bangalore, India, have now implemented an algorithm for analysing void space in sphere packing, where the spheres need not all be the same size. This method, just published in EPJ E, could be applied to analyse the geometry of liquids present between multi-sized spheres that are akin to a model for porous material. This provides a tool for studying the flow of such fluids through porous material. More importantly, it can also be used to study the packing geometry of proteins.

Read more...

EPJ Plus Highlight - Simulations’ Achille’s heel

alt
Example of periodic repetition of a small system. © D. Frenkel et al.

What can go wrong when computer simulations are applied outside their original context

In an article just published in EPJ Plus, Daan Frenkel from the University of Cambridge, UK, outlines the many pitfalls associated with simulation methods such as Monte Carlo algorithms or other commonly used molecular dynamics approaches.

The context of this paper is the exponential development of computing power in the past 60 years, estimated to have increased by a factor of 1015, in line with Moore’s law. Today, short simulations can reproduce a system the size of a bacterium.

Read more...

EPJ B Highlight - Novel materials: smart and magnetic

alt
Kinetic arrest and supercooling band as a function of magnetic field and temperature. © K. Mukherjee et al.

Varying magnetic fields and temperature conditions help to elucidate smart materials’ transitory magnetic disorder

Novel, smart materials like shape memory alloys very often display so-called glass-like magnetism. Other smart materials with similar properties include those which, when exposed to a magnetic field, change their electrical resistance, known as manganites, or change their temperature, known as magnetocaloric materials. Kaustav Mukherjee and his colleagues from the Consortium for Scientific Research Indore in India studied a key stage in the formation of such a magnetic glass material, called Pr0.5 Ca0.5 Mn0.975 Al0.025 O3, in a paper just published in EPJ B.

Read more...

EPJ D has a new Editor in Chief for quantum optics and quantum information

 Vladimir Bužek new Editor-in-Chief of EPJ D as of 1 January 2013

From January 2013 Vladimir Bužek succeeds Claude Fabre as Editor in Chief of EPJ D with responsibility for papers in quantum optics, quantum information and related topics.

Prof. Dr. Bužek graduated from the Moscow State University (both MSc and PhD) in theoretical physics. His research interests are focused on quantum optics, quantum information sciences, quantum measurement theory and foundations of quantum mechanics. He has been the head of the Research Center for Quantum Information at the Slovak Academy of Sciences and holds a professorial position at the Faculty of Informatics of the Masaryk University in Brno, Czech Republic.

Read more...

EPJ H Highlight - More than one brain behind E=mc2

alt
Friedrich Hasenöhrl found proportionality between energy and its mass in a cavity filled with radiation. Source: Österreichische Zentralbibliothek fuer Physik

A new study reveals the contribution of a little known Austrian physicist, Friedrich Hasenöhrl, to uncovering a precursor to Einstein famous equation

An American physicist outlines the role played by Austrian physicist Friedrich Hasenöhrl in establishing the proportionality between the energy (E) of a quantity of matter with its mass (m) in a cavity filled with radiation. In a paper just published in EPJ H, Stephen Boughn from Haverford College in Pensylvannia argues how Hasenöhrl’s work, for which he now receives little credit, may have contributed to the famous equation E=mc2.

Read more...

EPJ E Highlight - Liquid crystal’s chaotic inner dynamics

alt
Numerically obtained projection of the trajectory of liquid crystal molecules. © W. Jeżewski et al.

Scientists have unearthed a new dynamic process induced by strong electric fields in thin liquid crystal cells

Liquid crystal displays are ubiquitous. Now, Polish physicists have demonstrated that the application of a very strong alternating electric field to thin liquid crystal cells leads to a new distinct dynamic effect in the response of the cells. The theory of spatio-temporal chaos explains this effect. It was elucidated by Wojciech Jeżewski and colleagues from the Institute of Molecular Physics, Polish Academy of Sciences, in Poznań, Poland, and was just published in EPJ E. This effect has implications for the operation of liquid-crystal devices because their operation is based on the electro-optic switching phenomenon, subject to the newly discovered effect.

Read more...

EPJ Web of Conferences now indexed in Scopus

EPJ Web of Conferences is now indexed in Scopus, the world’s largest abstract and citation database of research literature. Scopus covers more than 20,500 titles from over 5,000 international publishers, in the scientific, technical, medical, and social sciences.

EPJ D Highlight - Fusion helped by collision science

alt
The ITER fusion reactor’s inner wall containing beryllium among other constituents. © ITER Organisation

Understanding the mechanisms of electron-molecule collisions could help predict the operations inside the fusion chamber of the ITER reactor

An international team of physicists has calculated the efficiency of a reaction involving an incoming electron kicking out an electron from the metal beryllium (Be) or its hydrogen compound molecules, in an article just published in EPJ D. The efficiency, which partly depends on the electron’s incoming speed, is encapsulated in a quantity referred to as electron-impact ionisation cross sections (EICS). Electron-molecule interactions matter because they occur in a broad range of applications from the simplest like fluorescent lamps to the most complex, for example, in ionised matter found in plasmas such as latest generation screens, the outer space of the universe, and in fusion reactors.

Read more...

EPJ A has a new Editor in Chief for experimental physics

Nicolas Alamanos new Editor-in-Chief of EPJ A as of 1 January 2013

From January 2013 Nicolas Alamanos succeeds Enzo De Sanctis as Editor in Chief of EPJ A for the experimental physics section.

Professor Alamanos is Deputy Director of the Institute of Research into the Fundamental Laws of the Universe (IRFU) and Research Director at CEA Saclay working in the domain of fundamental research in Nuclear Physics. During his long scientific career, he has served on many scientific and program advisory committees and has occupied different managerial positions. Most notably he has been president of GANIL’s scientific council and director of Saclay Nuclear Physics Division. He is a member or evaluator of many national committees – ARISTEIA (GRECE), FRS-FNRS (Belgium), ANR (France). He is currently a member of the GANIL/SPIRAL2 scientific council, of GANIL’s program advisory committee, and scientific counselor of the European program “CEA-Euro talents” in the domain of high energy physics and physics of the universe.

In addition to his various scientific and administrative duties, Professor Alamanos has always been very active editorially: beyond having been a member of the editorial board of EPJ A for many years, he is the Editor of the Scholarpedia Encyclopedia of Nuclear Physics.

EPJ D Highlight - May the force be with the atomic probe

alt
The ratio between the interaction potentials in the bulk and surface models showing that the difference is largest when the atom-surface distance is matched to the screening length. © E.Eizner, B. Horovitz, and C. Henkel

New models suggest devising means of probing a surface at a sub-micrometric level as this will help us understand how electrons’ diffusion affects long-range attractive forces

Theoretical physicist Elad Eizner from Ben Gurion University, Israel, and colleagues created models to study the attractive forces affecting atoms located at a wide range of distances from a surface, in the hundreds of nanometers range. Their results, just published in EPJ D, show that these forces depend on electron diffusion, regardless of whether the surface is conducting or not. Ultimately, these findings could contribute to designing minimally invasive surface probes.

Read more...

Editor-in-Chief
Paolo Biscari
The authors acknowledge the two anonymous reviewers for the constructive comments and suggestions which have helped to improve the manuscript significantly and thank the journal for the kind collaboration.

Sandra Morelli, Università di Modena, Italy

ISSN: 2190-5444 (Electronic Edition)

© Società Italiana di Fisica and
Springer-Verlag