OpenAI chief executive Sam Altman will appear before Congress on Tuesday to testify about the dangers posed by emerging artificial intelligence technologies, including his company’s ChatGPT AI chatbot. The hearing before the Senate Judiciary Subcommittee on Privacy, Technology and the Law will begin at 10am local time (3pm BST), during which members will question Mr Altman and other tech leaders about the “urgent” need to create rules for AI. Mr Altman will appear alongside Gary Marcus, Professor Emeritus at New York University, and Christina Montgomery, chief privacy officer at IBM. Committee Chair, US Senator Richard Blumenthal, said ahead of the hearing: “Artificial intelligence urgently needs rules and safeguards to address its immense promise and pitfalls.” Ranking member Josh Hawley added: “Artificial intelligence will be transformative in ways we can’t even imagine, with implications for Americans’ elections, jobs, and security.” We will have all the latest news and updates from the hearing in our coverage below, as well as a live stream as soon as it is available.

Researchers have invented a double-sided solar panel capable of generating electricity from the Sun’s energy on both sides. The bifacial solar cell, developed at the US Department of Energy’s National Renewable Energy Laboratory (NREL), harvests reflected sunlight hitting the back of the device, offering an unconventional route to producing higher energy yields for less space and cost. Typical advances to solar cell efficiency rates centre on iterative improvements to the side facing the Sun. This new approach could boost the energy harvesting capabilities of solar panels beyond their theoretical limit. “This perovskite cell can operate very effectively from either side,” said Kai Zhu, a scientist at the Chemistry and Nanoscience Center at NREL who led the research. Current solar cell technologies, which use silicon as the semiconductor material, have an efficiency rate of around 26 per cent – higher than the 23 per cent achieved in lab tests by the front side of the new panel. The back side of the panel, however, achieves an efficiency of about 91-93 per cent of the front, which offers up to 20 per cent more power overall when harvesting reflected sunlight. Perovskite has become a key driver of solar cell advancements in recent years, breaking new efficiency records and providing new pathways to creating next-generation technologies. Earlier this week, researchers unveiled perovskite-based solar cells capable of healing themselves when damaged by radiation in low-Earth orbit. Tandem silicon-perovskite solar cells have achieved lab-measured efficiency of more than 30 per cent, and have a theoretical limit far higher than purely silicon cells. Rapid progress with their development has seen two separate startups announce commercial production of the next-generation panels. Producing the bifacial solar panels would cost more than monofacial modules, however their capacity to produce more power could make them more economically viable over time. The latest research was detailed in a study, titled ‘Highly efficient bifacial single-junction perovskite solar cells’, published in the journal Joule. Read More Scientists invent self-healing solar panels with ‘miracle material’ How tech could turn our homes into renewable energy power stations

PITTSBURGH--(BUSINESS WIRE)--Aug 23, 2023--

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Ange Postecoglou appears set to leave Celtic and take over at Tottenham. Spurs fans appear to be split on the selection with some questioning his pedigree, but that will not faze the single-minded 57-year-old. So what do Tottenham supporters need to know about their prospective new boss? – Who is Ange Postecoglou? The Australian, who emigrated from Greece at the age of four, won two titles as a South Melbourne player, where he worked under Real Madrid great Ferenc Puskas, and won four Australia caps before injury forced him to move into coaching at a young age. – What success has he achieved?Postecoglou led South Melbourne to two titles as manager in his early 30s and then spent seven years coaching Australia’s youth teams. He burst back on to the domestic scene, leading Brisbane Roar from finishing bottom of the A-League to consecutive Grand Final victories in 2011 and 2012, with the help of a record 36-game unbeaten run. He took charge of Australia at the 2014 World Cup, won the Asian Cup the following year and led his country to 2018 World Cup qualification before taking charge of Yokohama F Marinos, guiding them to their first J-League title in 15 years in 2019. – And how about in Scotland? He won five out of six domestic trophies during his two years in charge of Celtic, including a treble in what appears to have been his final campaign. European football was the missing piece of the jigsaw. However, Celtic generally performed well in the Champions League this past season – against Real Madrid, RB Leipzig and Shakhtar Donetsk – while squandering chances that should have got them more than two points on their return to the elite stage. – Does he have the experience for the Premier League? Postecoglou addressed the fact there was a mixed response to his appointment as Celtic manager and was also unfazed by the fact a deal for Eddie Howe had fallen through. “You’re assuming I was second choice, I might have been fifth choice, you never know,” he said at his unveiling. “It doesn’t really bother me. What’s important is that I have been given the responsibility and opportunity.” He also dismissed suggestions he was making a “jump” in standard. “I have coached at a World Cup, I have coached against some of the best teams in the world,” he said. He will not be concerned by the reaction to his Tottenham appointment given his total focus and belief in his process. – What style of football does he employ? Postecoglou has matched success with an attacking style and prides himself on building teams that get people talking and excite the fans. Celtic scored a post-war club record 114 league goals this past season. His goalkeeper will need to pass the ball out, his centre-backs get on the front foot and are aggressive, while he employs inverted full-backs. His team played with two attacking central midfielders and two wingers who have to get in front of goal when balls come in from the other flank, while the centre-forward can expect plenty of chances. His mantra is “we never stop” and even the Celtic ball attendants are in tune with his demand to keep the game moving. – What kind of manager is he? Postecoglou has spoken of his love of a challenge and building something special from scratch. “Just about every job I have had has been an extensive rebuild,” he once said. “Usually you come in when people are needing change. Secondly, the way I get my teams to play is challenging, and requires a major shift, usually both in playing staff and the way we work.” He exerted control over a number of areas of the football department at Celtic and oversaw a massive rebuild while winning the title against a Rangers side who finished 25 points ahead the previous season and reached a European final in his first Scottish campaign. He quickly won respect from Celtic players and fostered a culture of togetherness but also takes a step back from them and lets the dressing room run itself on match days. Australia international Ryan McGowan remarked how he sat next to Postecoglou on a long-haul flight in total silence as his manager does not want to be swayed by personal relationships when making decisions. – What relationship can Tottenham fans expect to have with their manager-in-waiting? Celtic fans bought into their manager’s style of play, how he represented the club and stood up for it in the media, although he very rarely talked about referee decisions. He also understood how important the club is to people’s lives and used that as a motivation. They gave him total backing in return, although success is obviously paramount to that. Read More Charity boss speaks out over ‘traumatic’ encounter with royal aide Ukraine war’s heaviest fight rages in east - follow live Alfie Hewett adapting to his new status as the man to beat in wheelchair tennis Where might Lionel Messi go next after Paris St Germain spell ends? Ange Postecoglou agrees to leave Celtic for Tottenham – reports

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European Union institutions and conservationists have given a conditional and guarded welcome to a major plan to better protect nature and fight climate change in the 27-nation bloc