[quick news] successful test flight of ion wind driven UAV developed by MIT on November 23, 2018

The successful test flight of the ion wind driven UAV developed by MIT Nature magazine recently published an engineering achievement: a small aircraft developed by the team of Massachusetts Institute of technology in the U.S successfully took off using the ion wind driven, which does not include the engine used by ordinary aircraft This makes it possible to make aircraft that are quieter, simpler in machinery, and do not produce combustion emissions It is reported that the aircraft weighs 2.45kg and has a wingspan of 5m, which is powered by a customized power system The custom powertrain consists of a battery pack and a high voltage power converter with an output power of approximately 500 watts In 10 test flights, the aircraft successfully flew 60 meters in indoor space, with an average flight height of 0.47 meters Although the overall efficiency is low, it is comparable to traditional propulsion systems such as jet engines The researchers report that the priority of such aircraft design is small aircraft rather than high efficiency, but future design can improve efficiency Https://www.nature.com/articles/s41586-018-0707-9 the first Association for science and technology of CAS was founded in Beijing on November 22 The first Association for science and technology of CAS, the Association for science and technology of Institute of computing technology of Chinese Academy of Sciences (hereinafter referred to as the Association for science and technology of Institute of Computing), was founded in Beijing Li Guojie, academician of the Chinese Academy of engineering and researcher of the Institute of computing of the Chinese Academy of Sciences, is the honorary chairman of the first committee of the Institute of science and technology of the Institute of computing, and Xu Zhiwei, director of the academic committee of the Institute of computing of the Chinese Academy of Sciences and researcher, is the chairman of the first committee of the Institute of science and technology of the Institute of computing After the establishment of CAS, on the one hand, it can better promote the scientific dissemination of relevant research results of CAS; on the other hand, it will better fulfill the social responsibility of CAS in the form of a professional organization, popularize scientific ideas and methods from the perspective of computer science, and improve the scientific literacy of the public Http://news.scienceet.cn/htmlnews/2018/11/420263.shtm the United States attempts to restrict the development of China's artificial intelligence technology recently According to foreign media reports, although the United States wants to technically restrict the development of China's artificial intelligence technology, the proposed restrictions on the export of artificial intelligence technology may cause American enterprises to lose their competitive advantage It is reported that the United States and China are competing to become the AI superpower of this century The winner will not only gain huge economic benefits, but also build new military advantages As Russian President Vladimir Putin said last year, "whoever becomes a leader in this field will become the ruler of the world." Of course, many experts object that most AI researchers don't think they are in an arms race at all Https://www.technologyreview.com/s/612453/a-us-attempt-to-keep-ai-out-of-china-hands-could-practically-help-china/proposed blockchain technology in South Korea to track beef food safety South Korean government departments said in a statement recently that they plan to use blockchain technology to track the entire supply chain of beef products sold in the market, from breeding to slaughtering and sales, in order to provide consumers with more reliable food safety information According to South Korean media reports, the plan was jointly launched by the Ministry of agriculture, forestry, animal husbandry and food and the Ministry of science, technology, information and communication It is planned to carry out pilot projects in the quanluobeidao livestock farm and slaughterhouse in December this year, and then officially in January next year At present, the tracking system of beef food safety information in Korea involves the whole process of animal husbandry, slaughtering, packaging and sales, mainly based on the way of document presentation Experts believe that this traditional way is time-consuming, costly and has the risk of falsifying documents The two government departments said that the application of blockchain technology can improve the efficiency and credibility of beef food safety information tracking process Http://www.xinhuanet.com/2018-11/21/c_.htm can paralyzed people use their brains to operate tablets? According to a foreign study, by implanting tiny chips in the brain of paralyzed people, they can directly control the tablet computer In the clinical trial of BrainGate, two participants with arm weakness or motor loss can chat online directly through brain control tablet by implanting microelectrode in their brain The research shows that this way of operating a tablet through the brain is even more natural than using a mouse "I'm optimistic that this technology is on its way," said Hochberg, the lead scientist of the study https://spectrum.ieee.org/the-human-os/biomedical/devices/paralyzed-individuals-operate-tablet-with-brain-implant