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IMAGE: IOS Press is pleased to announce the publication of the second edition of the classic Handbook of Satisfiability. view more
Credit: Carnegie Mellon University
Amsterdam, March 8, 2021 - IOS Press is pleased to announce the publication of the second edition of the classic
Handbook of Satisfiability. Originally published in 2009 and part of the Frontiers in Artificial Intelligence and Applications series, the handbook has been thoroughly updated and revised. It succeeds in capturing the full breadth and depth of satisfiability (SAT), bringing together significant progress and advances in automated solving.
Editors of the second edition are prominent members of the SAT community: Armin Biere, Johannes Kepler University, Linz, Austria; Marijn Heule, Carnegie Mellon University, Pittsburgh, USA; Hans van Maaren, TU Delft, The Netherlands; and Toby Walsh, University of New South Wales, Kensington, Australia.
Credit: Lucas Schweickert
In a potential boost for quantum computing and communication, a European research collaboration reported a new method of controlling and manipulating single photons without generating heat. The solution makes it possible to integrate optical switches and single-photon detectors in a single chip.
Publishing in
Nature Communications, the team reported to have developed an optical switch that is reconfigured with microscopic mechanical movement rather than heat, making the switch compatible with heat-sensitive single-photon detectors.
Optical switches in use today work by locally heating light guides inside a semiconductor chip. This approach does not work for quantum optics, says co-author Samuel Gyger, a PhD student at KTH Royal Institute of Technology in Stockholm.
In March 2020, reports claimed the World Health Organisation (WHO) had warned against using cash amid fears it could be spreading coronavirus. The WHO later pushed back on the claim, declaring it had never issued any official warnings – but it wasn’t the only whisperings of ‘dirty cash.’ China had already begun sterilising money in February out of hygiene concerns, and in March the US Federal Reserve started quarantining dollars from Asia, begging an important question: how clean was cash?
In response, retailers across the world began putting more emphasis on cashless transactions, with contactless payments growing by more than 40 percent globally in the first quarter of 2020, according to a survey by Mastercard. A study by data firm Dynata found the preference for cash dropped by 31 percent in the early months of the pandemic across the countries surveyed, and YouGov research found that ATM withdrawals in the UK had fallen by around 60 percent over lockdown.