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Computers can measure your pulse remotely by bouncing ultrasound waves off your body and analysing the reflections to detect the tiny chest movements caused by your heart pumping. The system could one day operate on home smart speaker devices.
Researchers at the University of the Chinese Academy of Sciences in Beijing and the University of Massachusetts Amherst used a laptop connected to a speaker to send out chirps of ultrasound at a frequency of 48 kilohertz. They then used a standard microphone to record the … Continue reading Subscribe now for unlimited access
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Solid-State Light Converters Optimized for High-Power LED Systems
Written by AZoOpticsJan 27 2021
Materials scientists from Far Eastern Federal University (FEFU) worked with an international team of researchers team to optimize the design of composite ceramic materials (Ce
3+:YAG-Al
3), that is, solid-state light converters (phosphors) that can be employed in-ground and aerospace technologies.
The microstructure of a composite ceramic phosphor, and the appearance of an LED device based on it. Image Credit: Far Eastern Federal University.
The LED system was created based on the developed materials to save 20% to 30% more energy than the commercial equivalents. An article related to this study was published in the
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IMAGE: The microstructure of a composite ceramic phosphor, and the appearance of an LED device based on view more
Credit: Denis Kosyanov, FEFU
Materials scientists of Far Eastern Federal University (FEFU), in collaboration with an international research team, have advanced the design of composite ceramic materials (Ce3+:YAG-Al2O3), i.e. solid-state light converters (phosphors) that can be applied in-ground and aerospace technologies. The LED systems based on the developed materials to save 20-30 percent more energy compared to commercial analogues. A related article was published in
Materials Characterization.
Over 15% of the total global electricity production or about $ 450 billion annually spent on lighting. According to the photonics development roadmap run in Russia, the development of LED technology with an efficiency of more than 150 lm/W will allow to release up to 30% of electricity by 2025.
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China’s legal reforms seek to cement party leadership’s role William Zheng william.zheng@scmp.com The National People’s Congress will have to follow the central leadership’s guidance in the legislative process. Photo: Xinhua
The Chinese Communist Party has unveiled new plans to overhaul the country s legal system in the next five years, emphasising the importance of the party s leadership.
The 15,000-word document, published by state news agency Xinhua on Sunday, outlined how the leadership wanted a country with a system of distinctively Chinese socialist rule of law . By 2035, the state, government, and a society governed by the rule of law will be basically completed, a socialist rule of law system with Chinese characteristics will be basically formed. The (Chinese) people s right to equal participation and development will be fully guaranteed, and the modernisation of the nation s governance system and capabilities will be largely achieved,