FacebookTwitterLinkedInEmailPrint分享Recharge:Rare-earth-free permanent magnet generators (PMG) for offshore wind turbines with nameplates of 20MW are expected to be a reality “within three years,” following trials of a new-generation concept at the UK Offshore Renewable Energy (ORE) Catapult facility.A 250kW version of the axial-flux design being developed by GreenSpur Wind, which uses ferrites – an iron-rich ceramic – for its magnets, would be part of a four-module 1MW unit that is foreseen to be scalable to a power rating roughly twice that of the biggest PMGs in service today.“It was our intention from the outset to design a generator that could be scaled for the next generation of offshore wind turbines,” said Hugh-Peter Kelly, GreenSpur’s head of technology and the inventors of the design. “The feedback that we’ve received is that current designs have known limitations and new concepts will be needed to deliver next generation 20MW offshore wind turbines.”GreenSpur is now moving forward with modelling for “significantly bigger, multi-megawatt generators”, with the target of designing a 12MW-plus concept for offshore turbine created by “stacking” three 4MW units in parallel.Replacing high-price rare-earth materials with ferrites – a waste material produced in steel-making – would cut the cost of PMG magnets from £40/kg ($50/kg) to around £1/kg, according to GreenSpur calculations, meaning the design could carve around 33% out of the capital cost of direct-drive generator, and so almost 5% off the price of a turbine.More: Offshore wind turbine 20MW generator ready ‘within three years’ U.K. company sees potential for 20MW offshore wind turbine within three years
Professor Nitin Kalé is the instructor of the course on blockchain technology in the Viterbi School of Engineering. Photo by Wanting He | Daily TrojanThis past semester, USC introduced its first-ever course on blockchain, one of the technological databases behind the cryptocurrency Bitcoin. Taught by Nitin Kalé, an associate professor of engineering practice at the Viterbi School of Engineering, the course aims to expose students to the processes of blockchain and spur discussion of its potential impact on society.Bitcoin is an emerging form of digital currency created in 2008, according to IBM, and blockchain is the technological database that oversees Bitcoin transactions. “I wanted to bring [blockchain] technology to students,” Kalé said. “[Blockchain technology] is where the industry is growing very rapidly. So companies, start-ups, people are trying to figure out how else to use blockchain to disrupt business, or some other industry.” In its first run this semester, the course was filled to capacity, and Kalé said he had to keep increasing the class size during registration due to its popularity. Other institutions like Stanford University, UC Berkeley and Princeton University have taught Bitcoin and cryptocurrency courses in their computer science departments for about two years, according to Kalé.Kalé has been studying blockchain technology and Bitcoin for about two years and worked to create an opportunity for students to understand how the database works. He has pushed for a trial blockchain course to evaluate student interest and see if it will be implemented as a permanent offering.“My near-term goal is in 2018, we will probably launch a specialization course by fall,” Kalé said. “Then by Fall 2019, if all goes well, I think we’ll have a minor in blockchain technology.”In Viterbi’s Information Technology program, there are two types of programs: a minor, in which students are officially enrolled and required to take five or six courses, and a specialization, which only requires students to take three courses.Kalé explained that although his first attempt to teach the course ran smoothly, he might have been too ambitious in his curriculum focus.“It turned out I couldn’t cover everything that I’d wanted to, so I’m offering this course again in the spring semester,” Kalé said. “I’m hoping I’ll make the class more efficient, maybe work on the pacing some more, so we can get more topics into the class.” Various students have expressed their interest in blockchain technology, both before and after taking Kalé’s course. Daniel Aghachi, a junior majoring in business administration, was inspired to start his own organization, called the Trojan Blockchain Society, based on his growing interest in the technology.“I realized there [is] no central hub for blockchain on campus,” Aghachi said. “There were events scattered around, and there was no one place to go. So I wanted to build a community of people who share the same passion as I do.”Both Kalé and Aghachi emphasized the importance of getting students and faculty excited about blockchain, and how monumental this technology has been. Through a class activity, Kalé was able to send his students Bitcoin.“In order to understand how blockchain works, you’ve got to understand every single step,” Aghachi said. “[Kalé] was so excited once we were able to get to the point where we understood how it all worked and put the pieces together, so he could send us each actually some Bitcoin.”
Syracuse (4-1, 0-1 Atlantic Coast) dominated Bucknell (2-4), 97-46, in the first game of the NIT Season Tip-Off. Elijah Hughes controlled the pace for Syracuse with 21 points, 16 of them coming in the first 10 minutes of game action, and five assists. Syracuse now travels to the Barclays Center for a matchup with Oklahoma State on Wednesday night.Here are three takeaways from the game.Big ImpactBourama Sidibe and Marek Dolezaj, who have started together since the season-opener, started quickly on Saturday. The two bigs combined to nearly out-rebound all of Bucknell by themselves in the first half (13-11) and fought for multiple second-chance opportunities around the rim. Their combined length caused trouble for Bucknell passing to the interior, making inside shots and rebounding — no matter the position they had.To start the second half, Sidibe missed multiple shots around the basket but got his own rebound each time. The length of Dolezaj forced Bucknell to draw some attention away from Sidibe, who finally corralled the ball and went up with a layup that sent the SU bench into a frenzy.AdvertisementThis is placeholder textTurnover happySyracuse rotated fast, it possibly showcased more length than the Bison have seen at any point so far this season, but all that combined with some sloppy passing from Bucknell. The Bison turned the ball over 23 times, a season-high for Syracuse opponents. The Orange’s zone was too difficult for Bucknell to keep track of: looking for openings often gave SU time to poke the ball away and forcing the ball into tight spots led to easy Syracuse interceptions.By the end of the first half, the stout SU defense had been established, which opened up for the offense to put the game away.Shooters shootSyracuse has, for the most part, stayed true to its preseason promise to shoot a lot of shots from the perimeter. Early in the game, Bucknell opened it up for that to happen. Several times, Hughes was left open on a skip pass to the corner, which led to open 3s and an inflated box score for Hughes. Once Hughes’ scoring quieted down, Buddy heated up from beyond the arc. His 22 points led all players, and most of his points came from handoffs or dump passes on the perimeter.In all, Syracuse shot 14-of-29 from beyond the 3-point arc. Nearly half of Syracuse’s field goals came from outside the 3-point line and SU converted with an efficiency it longed for in the preseason. Comments Published on November 23, 2019 at 1:55 pm Contact Michael: email@example.com | @MikeJMcCleary Facebook Twitter Google+
CJIA expansion projectWith calls mounting for a thorough probe into the Cheddi Jagan International Airport (CJIA) expansion project, the Audit Office of Guyana (AOG) has confirmed that it will be launching an audit into the controversial project.Auditor General Deodat SharmaIn an exclusive interview with Guyana Times, Auditor General Deodat Sharma noted that he has the power to conduct the audit whether it is requested or not. And according to the AG, he is currently making preparations for the audit.According to Sharma, both a value-for-money and an overall financial audit will be conducted into the airport, the US$150 million expansion project and its associated expenditure. However, he noted that it was too premature to name a definitive date for the start of the audit.“I would be doing it on my own, because it’s a very important issue right now… CJIA is part of my audit portfolio,” Sharma said, when asked if Government had approached him to conduct the audit.In 2012, under the People’s Progressive Party/Civic (PPP/C) Administration, Guyana secured a US$138 million loan from the China Exim (Export-Import) Bank to fund the expansion and modernisation project, for which the Guyana Government was slated to inject some US$12 million.Public Infrastructure Minister David PattersonUpon completion, the Airport is expected to have four air passenger boarding bridges for arrivals and departures; a 450-seat departure area, escalators and elevators in addition to an extended runway catering for larger categories of aircraft.However, the extension of works into 2019 comes in disparity to an earlier commitment by Government whereby it pledged that the works associated with the expansion would have been completed by the last quarter of 2018. Initially, the project was scheduled to be completed within 32 months of its commencement in 2013. Later on, officials were optimistic of the project being completed by 2017.The A Partnership for National Unity and Alliance For Change (APNU/AFC) when in Opposition had cut the funds the then Government – PPP/C – had allocated for the CJIA expansion.Calls have been mounting for an audit into the CJIA expansion projectEven though it inherited and took control of the project almost four years ago, the coalition Government has of late been throwing the blame for the delays at the feet of the former Administration.According to Public Infrastructure Minister David Patterson, in a statement via his social media account on Monday last, the coalition Government is not at fault as it has done its best to make do.Claiming that the absence of preliminary reports hampered the project, Patterson went on to accuse the former Administration of allowing extra sand filling and determining the cost of the sand.But former Public Works Minister Robeson Benn had promptly responded, denying claims that the project was not supervised in its early stages and throwing his support behind calls for “a full-fledged public investigation” into the project.In a statement on Tuesday, Benn questioned how a fixed-price contract was allowed to deviate to such an extent. He noted that there have been extensive modifications to the project, with the plans for a new stand-alone terminal building being changed to an Arrival Hall addition to the old terminal building.He had also noted that instead of eight bridges, Guyana was only getting four. Benn had also observed that the mezzanine floor with escalators to a viewing gallery had been cut out from the construction; and the building’s footprint and actual total square footage are now less than what was contracted for.