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New analysis of 2D perovskites could shape the future of solar cells and LEDs

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An innovative analysis of two-dimensional (2D) materials from engineers at the University of Surrey could boost the development of next-generation solar cells and LEDs.
Three-dimensional perovskites have proved themselves remarkably successful materials for LED devices and solar panels in the past decade. One key issue with these materials, however, is their stability, with device performance decreasing quicker than other state-of-the-art materials. The engineering community believes the 2D variant of perovskites could provide answers to these performance issues.
In a study published in
The Journal of Physical Chemistry Letters, researchers from Surrey s Advanced Technology Institute (ATI) detail how to improve the physical properties of 2D perovskite called Ruddlesden-Popper. ....

Ravi Silva , Cameron Underwood , University Of Surrey , Technology Institute , Surrey Advanced Technology Institute , Physical Chemistry Letters , Advanced Technology Institute , Technology Engineering Computer Science , Electrical Engineering Electronics , ரவி சில்வா , கேமரூன் அஂடர்‌வுட் , பல்கலைக்கழகம் ஆஃப் சர்ரே , தொழில்நுட்பம் நிறுவனம் , உடல் வேதியியல் எழுத்துக்கள் , தொழில்நுட்பம் பொறியியல் கணினி அறிவியல் , மின் பொறியியல் மின்னணுவியல் ,

Optimal design for acoustic unobservability in water

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VIDEO: Square norm of sound pressure in water around a designed acoustic cloak during topology optimization.
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Credit: GARUDA FUJII, INSTITUTE OF ENGINEERING, SHINSHU UNIVERSITY, JAPAN
Until now, it was only possible to optimize an acoustic cloaking structure for the air-environment. However, with this latest research, Acoustic cloak designed by topology optimization for acoustic-elastic coupled systems, published in the latest
Applied Physics Letters, it is possible to design an acoustic cloak for underwater environments.
In the conventional topology optimization of acoustic cloaking, the design method was based on an analysis that approximated an elastic body in the air as a rigid body. However, since the approximation holds only for materials that are sufficiently stiff and dense such as metal in the air, there were few material options other than metal. Moreover, it was impossible to design an acoustic cloak in water by t ....

Garuda Fujii , Shinshu University , Applied Physics Letters , Associate Professor Garuda Fujii , Algorithms Models , Systems Chaos Pattern Formation Complexity , Technology Engineering Computer Science , Computer Science , கருத புஜி , ஷீன்ஷு பல்கலைக்கழகம் , பயன்படுத்தப்பட்டது இயற்பியல் எழுத்துக்கள் , இணை ப்ரொஃபெஸர் கருத புஜி , அமைப்புகள் குழப்பம் முறை உருவாக்கம் சிக்கலானது , தொழில்நுட்பம் பொறியியல் கணினி அறிவியல் , கணினி அறிவியல் ,

Skoltech team shows how Turing-like patterns fool neural networks

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Skoltech researchers were able to show that patterns that can cause neural networks to make mistakes in recognizing images are, in effect, akin to Turing patterns found all over the natural world. In the future, this result can be used to design defenses for pattern recognition systems currently vulnerable to attacks. The paper, available as an arXiv preprint, was presented at the 35th AAAI Conference on Artificial Intelligence (AAAI-21).
Deep neural networks, smart and adept at image recognition and classification as they already are, can still be vulnerable to what s called adversarial perturbations: small but peculiar details in an image that cause errors in neural network output. Some of them are universal: that is, they interfere with the neural network when placed on any input. ....

Alan Turing , Nurislam Tursynbek , Ilya Vilkoviskiy , Valentin Khrulkov , Ivan Oseledets , Maria Sindeeva , Skoltech Computational Intelligence Lab , Artificial Intelligence , Data Intensive Science , Computer Vision , Pattern Recognition , Advanced Studies , Technology Engineering Computer Science , Computer Science , System Security Hackers , Research Development , Robotry Artificial Intelligence , ஆலன் டூரிங் , செயற்கை உளவுத்துறை , தகவல்கள் தீவிர அறிவியல் , கணினி பார்வை , முறை அங்கீகாரம் , தொழில்நுட்பம் பொறியியல் கணினி அறிவியல் , கணினி அறிவியல் , அமைப்பு பாதுகாப்பு ஹேக்கர்கள் , ஆராய்ச்சி வளர்ச்சி ,

Robots learn faster with quantum technology

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Robots solving computer games, recognizing human voices, or helping in finding optimal medical treatments: those are only a few astonishing examples of what the field of artificial intelligence has produced in the past years. The ongoing race for better machines has led to the question of how and with what means improvements can be achieved. In parallel, huge recent progress in quantum technologies have confirmed the power of quantum physics, not only for its often peculiar and puzzling theories, but also for real-life applications. Hence, the idea of merging the two fields: on one hand, artificial intelligence with its autonomous machines; on the other hand, quantum physics with its powerful algorithms. ....

Valeria Saggio , Philip Walther , Hans Briegel , University Of Innsbruck , German Aerospace Center , Massachusetts Institute Of Technology , Leiden University , Austrian Academy Of Sciences , University Of Vienna , Austrian Academy , Massachusetts Institute , Chemistry Physics Materials Sciences , Mathematics Statistics , Technology Engineering Computer Science , Computer Science , Research Development , Robotry Artificial Intelligence , வலேரியா சாக்கிஓ , பிலிப் வால்டர் , பல்கலைக்கழகம் ஆஃப் இந்ந்‌ஸ்ப்ரக் , ஜெர்மன் விண்வெளி மையம் , மாசசூசெட்ஸ் நிறுவனம் ஆஃப் தொழில்நுட்பம் , ஆஸ்திரேலிய கலைக்கழகம் ஆஃப் அறிவியல் , பல்கலைக்கழகம் ஆஃப் வியன்னா , ஆஸ்திரேலிய கலைக்கழகம் , மாசசூசெட்ஸ் நிறுவனம் ,

Award-winning professor writes forgotten women into tech-history

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IMAGE: In 2015, Pernille Bjørn became the first woman to be appointed to a professorship at the University of Copenhagen s Department of Computer Science.
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Credit: Photo: Emilie Thejll-Madsen
DISSEMINATION AWARD: Women sent the first computer into space and programmed some of the 1970 s most iconic computer games. Nevertheless, women are invisible in both the history and culture of computer science. Professor Pernille Bjørn wants to change all that, and in doing so, promote increased diversity in the tech world. On March 8, Professor Bjørn will receive the SCIENCE Dissemination Award for her work highlighting women in computer science. ....

United States , Pernille Bjoern , Michael Skov Jensen , Jeff Bezos , Mette Kowalski , Emilie Thejll Madsen , University Of Copenhagen Department Computer Science , Department Of Computer , Department Of Computer Science , University Of Copenhagen , University Of Washington , Computer Supported Cooperative Work , Nazi Germany , Enigma Code , World War , Mark Zuckerberg , Qatari Women , Computer Science Only , Computer Science , Skov Jensen , Arts Culture , Researchers Scientists Awards , Technology Engineering Computer Science , Software Engineering , ஒன்றுபட்டது மாநிலங்களில் , மெத்தே கோவல்ஸ்கி ,