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Apr 25, 2014 by Nancy Owano Credit: Institution of Mechanical Engineers
(Phys.org) A speed history-making cycle is being prepared by a team of eight determined UK engineering students. They have ambitions to unleash a vehicle capable of reaching a top speed of 90 mph by pedal power alone. As such, it could become the fastest human-powered vehicle in history. The name of this vehicle is the Arion1 Velocipede. The design is by Liverpool University students, known as the ULVT (University of Liverpool Velocipede Team). They hope to break the 83.13 mph record set last year by TU Delft and VU Amsterdam universities. The competition to break the record for the fastest human powered vehicle is governed by the International Human Powered Vehicle Association (IHPVA), which hosts an annual event, the World Human Powered Speed Challenge, an event that takes place under rigorous test conditions in Battle Mountain, Nevada.
According to the university's student news service, data is touted such as the future ARION1 Velocipede becoming 40 times more aerodynamic than a Bugatti Veyron and generating enough power to light the average UK home.
The design involves the rider being just five inches from the floor, generating over 700 watts of pure human power. The ARION1 is to use a camera to feed images to a monitor in front of the rider's eyes.
The rider is positioned almost lying down, close to the ground, minimizing air resistance in "recumbent" cycling style. The vehicle encasement is a carbon fiber shell. The design looks odd, like a giant speeding bullet or a junior-sized spaceship, but the shape is for practical reasons. A Daily Mail report noted, "The unusual shape of the Arion1's exterior shell improves the aerodynamic behavior of the vehicle as air resistance is the biggest challenge to maintaining speed. The design uses the same concept as aircraft wings adopting an inverted 'teardrop' shape to cut through the air as easily as possible." The ARION1 weighs less than 25 kilos (55 pounds).
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The University of Liverpool Velocipede Team (ULVT) are members of the Institution of Mechanical Engineers. Philippa Oldham, head of transport at the Institution of Mechanical Engineers, said, 'To get to the speeds they intend to, the team will have to make sure everything is perfect, from the vehicle's aerodynamics to the size of its wheels."
The team aims to have the Arion1 designed and manufactured by May next year, in time for the record event in September of next year at the World Human Power Speed Challenge in Battle Mountain, Nevada.
Explore further: BLOODHOUND team predict the impact of the 1,000 mph supersonic car
More information: http://www.imeche.org/news/institution/press-release/liverpool-students-aim-to-build-and-race-fastest-bike-in-history ulvt.co.uk/
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Liverpool team preps Arion1 Velocipede for speed challenge 2015
Apr 25, 2014 by Curt Anderson
A U.S. appeals court is wrestling with whether law enforcement has the authority to obtain and use records from cellphone towers, in a case that weighs the importance of people's right to privacy in the age of digital technology.
The American Civil Liberties Union and other groups say it's too easy for law enforcement officials to get cell tower records and argue that they should be covered by the ban on unreasonable searches and seizures, which is protected by the Fourth Amendment of the U.S. Constitution. Current law allows authorities to obtain a court order by telling a judge the cellphone information is relevant to their investigation. The ACLU is seeking a higher legal standard, with investigators required to show probable cause that a crime was committed, and obtain a search warrant.
"This provides the government with a time machine it has never had before," ACLU attorney Nathan Wessler told the three-judge panel of the 11th U.S. Circuit Court of Appeals on Friday. "It's a great wealth of information about your private life."
The case follows recent disclosures that U.S. intelligence agencies, including the National Security Agency, routinely scoop up cellphone communications across a broad spectrum of Americans. And cellphone-tower cases have resulted in split verdicts in two other federal appeals courts. It's likely one will wind up before the U.S. Supreme Court, which in 2012 ruled that attaching global-positioning tracking devices to suspects' cars was a breach of privacy.
The latest case stems from an appeal by 22-year-old Quartavious Davis, who is serving a 162-year sentence for a string of robberies in 2010. He was convicted in part because authorities obtained from cellphone companies more than 11,000 tower location records spanning 67 days, some of which placed his phone near stores in the Miami area where the robberies occurred.
In Davis' case, other evidenceincluding DNA and testimony from fellow gang memberswas used to convict him, but prosecutors relied heavily on the cell tower records in closing arguments to the jury. Davis was the only one of six men charged who went to trial, with the others pleading guilty. Judges had no discretion in deciding his sentence because of minimum mandatory requirements, which many defense attorneys decry as unduly harsh punishment.
Some of the gang had already been charged and arrested when prosecutors obtained the court order on Feb. 2, 2011, to gain access to Davis' cellphone tower records. He was added to a new indictment about two weeks later.
If the courts ultimately find that a warrant should be necessary to obtain cell tower records, it should not affect Davis' case, Assistant U.S. Attorney Roy Altman argued. He cited the "good faith" exception for law enforcementif authorities relied on a law that is later found unconstitutional, they shouldn't be punished for it.
It will likely be weeks or months before the panel rules. Meanwhile, Wessler said yet another cellphone tower records case is winding its way toward a hearing in another federal appeals court.
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US court weighs police use of cellphone tower data
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