Luminar Technologies Inc., the laser sensor startup which went public in a $3.4 billion reverse merger in 2020,

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NEW YORK--(BUSINESS WIRE)--May 9, 2023--

Teachers will have to write monthly checks if they want to stay in their union instead of having dues automatically deducted from their paycheck

Future space missions might use all-female crews because they are more “efficient”, a new study has suggested. Many space agencies around the world are already preparing for the first human trips to Mars and perhaps other planets. But those trips will be incredibly resource-intensive, with the food and other material required to support a crew over years being an important consideration. One way to minimise that demand on resources would be to send all-female crews, a new study conducted by the European Space Agency suggests. It found that female astronauts would be likely to need less water to stay hydrated, expend less energy, need less oxygen and carbon dioxide and produce less heat than their male counterparts. That in turn would require less space to store the equipment needed to allow those astronauts to live, and therefore make the journey theoretically easier for engineers. The exact difference between a male and female crew would depend on the stature and other details of the astronauts that were chosen. But in all situations, the all-female crew were found to use less energy. That was because they are lighter than their male counterparts, and tend to use less oxygen when they are exercising. The difference remained true even when the astronauts were modelled as if they were engaging in the kind of exercise that astronauts have done on the International Space Station, which is required to ensure they stay fit and healthy without the usual gravity on Earth. The fact that women also tend to be smaller would be another advantage the scientists note, since it would mean that engineers would be able to build them smaller space habitat modules. “There may be a number of operational advantages to all-female crews during future human space exploration missions,” the team conclude in a new paper. The work was theoretical and used already published data on female astronauts and physiological research. The research is published in a new paper, ‘Effects of body size and countermeasure exercise on estimates of life support resources during all-female crewed exploration missions’, in Scientific Reports. Read More Why is Elon Musk purging Twitter accounts? Apple finally launches two professional apps on the iPad AI robots figure out how to play football in shambolic footage

Elon Musk is “purging” old accounts on Twitter, he has said, in yet another controversial change to the service. He said that accounts with “no activity at all for several years” would be removed from the platform. He noted that the result is likely to be a decrease in people’s follower account. But the move has already led to widespread criticism from users who say that it could remove important personal and social history from the site, as well as being yet another ill-explained move from Mr Musk. Much remains unclear about the plan. Mr Musk did not clarify what would mark an active account, for instance – whether it would need its owner to sign in, or if they might have to post – and gave no information about the timescale of the “purging”. But here’s everything we do know about what will be happening to those old Twitter accounts. Why would Elon Musk do this? Mr Musk suggested that the focus is on “free[ing] up abandoned handles”. Many Twitter users who joined the site in its early years were able to claim much-desired usernames – such as those with only three characters – and have not used them since. Even before the purge, people have gone to considerable lengths in order to get those accounts. Those holding particularly valuable handles have spoken about being subject both to hacking attacks and considerable monetary offers to get access to them. It also has the benefit of giving an indication that staying as an active member of Twitter is valuable – or, at least, that it might be problematic not to use an account at all. That in turn could mean that more people log in to more Twitter accounts more regularly, which is a key metric at advertising-driven companies such as Twitter. Why is it being criticised? Many users have suggested that getting rid of those old, inactive accounts will mean deleting history. That might mean deleting accounts that were run by dead loved ones, or simply removing posts that have had a substantial impact on the world. In response, Mr Musk has indicated that the accounts will be “archived”, in a tweet replying to one such critic. He did not give any information about what this might mean, but other comments suggested that the posts may stay available on Twitter but not at the old handle. Many also suggested that the plan had not been fully thought through when it was announced, noting that Mr Musk had given no information to those who might have accounts removed, such as those that use them only to follow developments on Twitter and not post their own tweets. Read More Elon Musk threatens to reassign inactive Twitter accounts Elon Musk says Twitter will let media outlets charge users per article view Jack Dorsey says Twitter ‘went south’ after its sale to Elon Musk Bluesky might be the hottest and most controversial app in the world Apple finally launches two professional apps on the iPad AI robots figure out how to play football in shambolic footage

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NEW YORK--(BUSINESS WIRE)--May 9, 2023--

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IRVING, Texas & TAIPEI, Taiwan--(BUSINESS WIRE)--May 9, 2023--