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EPJ B Highlight - Harvesting vibrational energy from coloured noise
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- Published on 05 March 2024
Two engineers from Beijing Institute of Technology in China have shown how to optimise the output of a device that can convert ambient vibrational energy into useful electric power.
The energy demands of today’s ubiquitous small electronic devices – including sensors, data transmitters, medical implants and ‘wearable’ consumer products such as Fitbits – can no longer be met by chemical batteries alone. This gap can be filled by energy harvesters, which turn ordinary, ambient vibrational energy into electrical energy. The most efficient types of harvester are tri-stable energy harvesters, which can convert even low-frequency random vibrations into alternating current (AC) and thence into direct current (DC). Tingting Zhang and Yanfei Jin from Beijing Institute of Technology in China have now investigated how the properties of these systems can be altered to optimise the power output; their findings are published in EPJ B.
EPJ Plus Highlight - Beam balance designs could elucidate the origins of dark energy
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- Published on 05 March 2024
With some improvements, the instrument could help physicists to identify the mysterious origins of dark energy.
One of the greatest problems in modern physics is to reconcile the enormous difference between the energy carried by random fluctuations in the vacuum of space, and the dark energy driving the universe’s expansion.
Through new research published in EPJ Plus, researchers led by Enrico Calloni at the University of Naples Federico II, Italy, have unveiled a prototype for an ultra-precise beam balance instrument, which they hope could be used to measure the interaction between these vacuum fluctuations and gravitational fields. With some further improvements, the instrument could eventually enable researchers to shed new light on the enigmatic origins of dark energy.
EPJ QT Highlight - Access to burgeoning quantum technology field could be widened by open master educational model
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- Published on 04 March 2024
Quantum technology offers major societal benefits, but its growth depends on the supply of a qualified workforce.
Quantum Technology is based on the engineering of devices that make use of the quantum properties of matter. One of the most prominent avenues of this technology is quantum computing, which may be able to leverage quantum bits (qubits) to perform calculations more efficiently than classical computers. Technology with this “quantum advantage” will also operate in the background of our lives, providing ultra-secure communications and high-precision sensors and clocks.
The applications of quantum technology have led to a boom in investment worldwide; with this technology expected to have a huge societal impact. But to maintain this burgeoning industry, it is crucial that graduates with training in quantum technology enter the workforce. Plus, for the European Union to stay ahead in the quantum tech race, the workforce must assemble on a much shorter timescale than the 3 to 5 years (or more) of a PhD program.
In a new paper in EPJ Quantum Technology, author Simon Goorney, from Aarhus University, Denmark, and his co-authors describe the development of Open Master, a new form of transnational education, that could serve as a means of enhancing accessibility to specialist expertise in quantum technology. The ultimate goal of the pilot scheme, which operated over the academic year of 2021 to 2022, was to use the experience to conceptualise a model for the future of quantum technology education.
EPJ E Highlight - Breaking an electrolyte’s charge neutrality
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- Published on 04 March 2024
Excess charge builds up in salt solutions due to interactions between electrostatic forces and a channel’s varying cross section
Plant vascular circulation, ion channels, our own lymphatic network, and many energy harvesting systems rely on the transport of dissolved salt solutions through tortuous conduits. These solutions, or electrolytes, maintain a positive or negative charge that’s vital to how the system functions. However, this charge balance depends on the properties of the channel that contains the fluid. In a study published in EPJ E, Paolo Malgaretti, of the Helmholtz Institute Erlangen-Nürnberg for Renewable Energy/Forschungszentrum Jülich, Germany, and his colleagues, now derive equations that describe how local electrical charge in electrolytes changes in channels with varying cross sections, at equilibrium. The result could help to predict pathways for charged particles in biological and technological systems.
EPJ Web of Conferences Highlight - MESON 2023 – 17th International Workshop on Meson Physics
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- Published on 26 February 2024
The 17th International Workshop on Meson Physics-Meson 2023, took place in Kraków from 22nd to 27th June 2023.
The Meson conference series has a long standing tradition and is organised by the Institute of Physics of Jagiellonian University, GSI Helmholtz Centre for Heavy Ion Research, INFN-LNF Frascati and Institute of Nuclear Physics Polish Academy of Science, in Kraków. It brings together experimentalists and theorists involved in studies of meson production, interactions, internal structure and meson properties in strongly interacting matter.
EPJ Plus Highlight - Unlocking the full potential of Auger electron spectroscopy
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- Published on 13 February 2024
A new computational approach makes more realistic assumptions about the redistribution of energy during the Auger process, improving the accuracy of Auger electron spectroscopy.
Auger electron spectroscopy (AES) is an incredibly useful technique for probing material samples – but current assumptions about the process ignore some of the key time-dependent effects it involves. So far, this has resulted in overly-simplified calculations, which have ultimately prevented the technique from reaching its full potential.
Through a new study published in EPJ Plus, Alberto Noccera at the University of British Columbia, Canada, together with Adrian Feiguin at Northeastern University, United States, developed a new computational approach which offers a more precise theoretical description of the AES process, while taking its time dependence into account. Their method could help researchers to improve their quality of material analysis across a wide array of fields: including chemistry, environmental science, and microelectronics.
EPJ A Topical Collection: AGATA: Advancements in science and technology
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- Published on 24 January 2024
Guest Editors: Nicolas Alamanos, Maria Jose Garcia Borge, Angela Bracco, Emmanuel Clément, Andres Gadea, Wolfram Korten, Silvia Leoni and John Simpson
The Advanced GAmma Tracking Array (AGATA) is a major European project, involving over 40 institutes in 12 countries, to develop and operate a high-resolution gamma-ray tracking spectrometer. Gamma-ray tracking requires the accurate determination of the energy, time and position of every interaction as a gamma ray deposits its energy within the detector volume. This is achieved by using electrically segmented hyper pure germanium detectors, pulse shape analysis of the digitised signals, and tracking algorithms to reconstruct the full event. The AGATA 4π geometry comprises 180 tapered-hexagonal coaxial detectors. AGATA can measure gamma rays from 10’s of keV to 10 MeV with excellent efficiency and position resolution and has a very high count rate capability. These features result in an instrument with a resolving power of two orders of magnitude larger than previous spectrometers, such as EUROBALL in Europe and Gammasphere in the USA. A similar tracking spectrometer is being constructed in the USA, called GRETA.
EPJ B Highlight - Investigating the role of random walks in particle diffusion
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- Published on 18 January 2024
Theoretical analysis reveals new insights into unusual patterns displayed by diffusing particles in recent experiments.
Several recent experiments identify unusual patterns in particle diffusion, hinting at some underlying complexity in the process which physicists have yet to discover. Through new analysis published in EPJ B, Adrian Pacheco-Pozo and Igor Sokolov at Humboldt University of Berlin show how this behaviour emerges through strong correlations between the positions of diffusing particles travelling along similar trajectories. Their results could help researchers to create better models of the diffusion process – ultimately drawing deeper insights into how fluids behave.
EPS Young Minds extends EPJ Scientific Advisory Committee as first Early Career Physics Network
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- Published on 18 January 2024
The Steering Committee of EPJ is delighted to welcome Mattia Ostinato, as the representative of the EPS Young Minds. The EPS Young Minds is the first Early Career Physicists Network to join in a move to extend the traditional Scientific Advisory Committee with a broader range of professional scientific networks providing the EPJ publishers collectively with relevant expertise and perspectives on all aspects of scientific publishing
Mattia Ostinato is a PhD student at the University of Barcelona (UB), where he works in the field of molecular dynamics simulations for soft matter systems, with a focus on magnetically driven colloidal dynamics. He has been an EPS member since 2015, and is part of the EPS Young Minds Action Committee since 2020.
EPJ D Topical Issue: Dynamics and Photodynamics: From Isolated Molecules to the Condensed Phase
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- Published on 17 January 2024
Guest Editors: Luis Bañares, Ramón Hernández-Lamoneda, Pascal Larregaray, Germán Rojas-Lorenzo and Jesús Rubayo-Soneira
Dynamics and photodynamics: from isolated molecules to the condensed phase is a highly interdisciplinary topical issue with numerous connections between traditional branches of physics and chemistry.
The issue provides a snapshot of current research in different areas of molecular systems science. It consists of 12 contributions representing both experimental and theoretical studies, ranging from fundamental mechanisms to more applied levels, which are essential in numerous applications of nanotechnology and material science. The contributions featured in this issue encompass a wide range of areas, including spectroscopy, photodissociation, dynamics of reactions involving neutral and charged cluster systems, carbon nanotubes and various other subjects.
This topical issue is celebrating the 20th anniversary of the Photodynamics Conference, held in Havana in November 2022.
All articles are available here and are freely accessible until 15 March 2024. For further information read the Editorial.
