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Archive for the ‘transportation’ category: Page 307

Apr 11, 2019

This moss-covered wall is as air-purifying as 275 urban trees

Posted by in categories: environmental, health, space, sustainability, transportation

From smog-sucking bikes to electric taxis and paint made of car exhaust, designers and architects are stepping up to address air pollution—the world’s single largest health risk. But a new air filter making the rounds in Oslo, Paris, Brussels, and Hong Kong shows that nature may be our best ally in this battle.

Essentially a moss-covered wall, each CityTree removes CO2, nitrogen oxides, and particulate matter from the air while also producing oxygen. A single tree is able to absorb 250 grams of particulate matter a day and remove 240 metric tons of CO2 each year—a level roughly on par with the air purification impact of 275 urban trees. Thirteen feet tall, with a metal frame, the CityTrees are easily installed in a public space, and they even have built-in seating at their base.

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Apr 10, 2019

A Jetsons future? Assessing the role of flying cars in sustainable mobility

Posted by in categories: sustainability, transportation

In the 1960s animated sitcom The Jetsons, George Jetson commutes to work in his family-size flying car, which miraculously transforms into a briefcase at the end of the trip.

A new study of the environmental sustainability impacts of flying cars, formally known as electric vertical takeoff and landing aircraft, or VTOLs, finds that they wouldn’t be suitable for a Jetsons-style short commute.

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Apr 10, 2019

Graphene coating could help prevent lithium battery fires

Posted by in categories: energy, engineering, transportation

Lithium batteries are what allow electric vehicles to travel several hundred miles on one charge. Their capacity for energy storage is well known, but so is their tendency to occasionally catch on fire—an occurrence known to battery researchers as “thermal runaway.” These fires occur most frequently when the batteries overheat or cycle rapidly. With more and more electric vehicles on the road each year, battery technology needs to adapt to reduce the likelihood of these dangerous and catastrophic fires.

Researchers from the University of Illinois at Chicago College of Engineering report that graphene—wonder material of the 21st century—may take the oxygen out of lithium battery fires. They report their findings in the journal Advanced Functional Materials.

The reasons catch fire include rapid cycling or charging and discharging, and in the battery. These conditions can cause the cathode inside the battery—which in the case of most lithium batteries is a lithium-containing oxide, usually lithium cobalt oxide—to decompose and release oxygen. If the oxygen combines with other flammable products given off through decomposition of the electrolyte under high enough heat, spontaneous combustion can occur.

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Apr 10, 2019

NASA is trying to build a supersonic aircraft without the boom

Posted by in category: transportation

NASA awarded a $247.5 million contract to Lockheed Martin to design and build an aeroplane that breaks the sound barrier without shattering the peace and quiet.

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Apr 9, 2019

Could dynamos be installed in electric cars to provide a perpetual source of power?

Posted by in categories: energy, physics, transportation

We already recover power from the wheels of some cars when slowing. Kinetic energy recovery systems (KERS) have been used in Formula One racing to store energy in a flywheel when braking, and then push it back to the wheels later for a boost in speed. Electric cars often use regenerative braking, which converts the speed of the wheels into electrical power to recharge the battery. These systems are a great way to increase efficiency, but like everything in the Universe, they are not 100 per cent efficient. Sadly, the laws of physics prohibit the existence of true perpetual motion, so it’s the best we can do.

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Apr 9, 2019

After just 20 hours of training, Wayve’s fast-learning AI car is already driving itself on unfamiliar roads

Posted by in categories: robotics/AI, transportation

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Forget large arrays of sensors and radars. Forget hard-coded road rules. British startup Wayve taught a car to teach itself to drive, and using only some cameras, a sat-nav and 20 hours’ worth of experience, it’s already driving itself short distances on unfamiliar UK roads.

Continue reading “After just 20 hours of training, Wayve’s fast-learning AI car is already driving itself on unfamiliar roads” »

Apr 9, 2019

Toyota offers free access to over 20 years of electric vehicle patents

Posted by in categories: Elon Musk, law, sustainability, transportation

Almost 5 years after Elon Musk allowed other manufacturers access to Tesla patents without fear of legal action – effectively making them open source – Toyota has announced that it’s opening up its vehicle electrification patent archive to help speed up the development and adoption of electric vehicles.

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Apr 9, 2019

Watch Tesla use its electric semi prototype to deliver a Model X to customer

Posted by in categories: sustainability, transportation

Tesla has released a video showing the first delivery of a vehicle to a customer using a Tesla Semi electric truck prototype – showing a glimpse of a future with zero-emission electric vehicle deliveries.

Over the last few quarters since Model 3 production has been somewhat sustainable at high volume, Tesla has had issues delivering the high numbers of vehicles.

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Apr 9, 2019

Record-breaking Trip to International Space Station in under 4 Hours

Posted by in categories: space, transportation

A resupply mission to the International Space Station (ISS) has made record time, traveling from Earth to the space station in just three hours and 21 minutes. The Soyuz-2.1a carrier rocket with a Progress MS-11 cargo spaceship was launched from the Russian space Agency Roscosmos’ Baikonur Cosmodrome in Kazakhstan at 7:01 a.m. on Thursday, April 4.

The super speedy travel time was possible due to a change in how resupply craft approach the ISS. Before, the resupply craft would have to orbit around the Earth dozens of times in order to catch up with the speed of the space station. But now there is a “fast-track” launch which allows the craft to catch up to the station in just two rotations. The resupply craft is launched less than a minute before the space station passes overhead of the launch site, so the craft can catch up to the station more quickly.

Nick Hague, an astronaut aboard the ISS, tweeted his approval of the achievement. “The progress resupply vehicle made record timing as it launched and docked to the station in under three and a half hours,” he said. “Pretty impressive!” The people of Twitter were impressed too. “…quicker than JFK-LAX!” one person commented.

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Apr 7, 2019

500,000 Pieces of Space Junk Are Traveling at 17,500 MPH Around Earth [VIDEOS]

Posted by in categories: space, transportation

More than 500,000 pieces of debris, or “space junk,” are tracked as they orbit the Earth. They all travel at speeds up to 17,500 mph, fast enough for a relatively small piece of orbital debris to damage a satellite or a spacecraft. If that sounds dangerous, that’s because it it is. The rising population of space debris increases the potential danger to all space vehicles, but especially to the International Space Station, space shuttles and manned spacecraft. NASA takes the threat of collisions with space debris seriously and has a long-standing set of guidelines on how to deal with each potential collision threat.

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