Sunday, August 20, 2017

Driving before, during, and after rush hour: city maps of how far you'd get

Location platform Here Technologies calculated how far one hour of driving can take drivers out of major American cities starting on Friday at 4, 7, and 10 pm. (more…)

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If you’ve ever watched a rocket launch, you’ve probably noticed...

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If you’ve ever watched a rocket launch, you’ve probably noticed the billowing clouds around the launch pad during lift-off. What you’re seeing is not actually the rocket’s exhaust but the result of a launch pad and vehicle protection system known in NASA parlance as the Sound Suppression Water System. Exhaust gases from a rocket typically exit at a pressure higher than the ambient atmosphere, which generates shock waves and lots of turbulent mixing between the exhaust and the air. Put differently, launch ignition is incredibly loud, loud enough to cause structural damage to the launchpad and, via reflection, the vehicle and its contents.

To mitigate this problem, launch operators use a massive water injection system that pours about 3.5 times as much water as rocket propellant per second. This significantly reduces the noise levels on the launchpad and vehicle and also helps protect the infrastructure from heat damage. The exact physical processes involved – details of the interaction of acoustic noise and turbulence with water droplets – are still murky because this problem is incredibly difficult to study experimentally or in simulation. But, at these high water flow rates, there’s enough water to significantly affect the temperature and size of the rocket’s jet exhaust. Effectively, energy that would have gone into gas motion and acoustic vibration is instead expended on moving and heating water droplets. In the case of the Space Shuttle, this reduced noise levels in the payload bay to 142 dB – about as loud as standing on the deck of an aircraft carrier. (Image credits: NASA, 1, 2; research credit: M. Kandula; original question from Megan H.)

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First U.S. Bugatti Chiron delivered to customer at Pebble Beach

Filed under: Bugatti,Coupe,Luxury,Supercars

01-bugatti-chiron-us-customer.jpg The yellow and black color scheme can be seen on classic Bugattis as well.

Continue reading First U.S. Bugatti Chiron delivered to customer at Pebble Beach

First U.S. Bugatti Chiron delivered to customer at Pebble Beach originally appeared on Autoblog on Sun, 20 Aug 2017 17:27:00 EDT. Please see our terms for use of feeds.

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Saturday, August 19, 2017

Xiaomi’s Mi Mix 2 may have even smaller bezels

The nearly bezel-free Xiaomi Mi Mix kicked off the Great Bezel Race of 2017, and now it seems like its successor may be right around the corner. Designer Philippe Starck posted a video of what looks to be the next version of the Mi Mix on his Facebook page with the tagline “even less” hinting that the device would have even smaller bezels.

Even less

Posted by Starck on Thursday, August 17, 2017

Outside of this short clip, we don’t know much about the Mi Mix 2 yet. It should also be noted that the video is a conceptual product design, so things may change before we see the actual finished version of the smartphone. But given that the original Mi Mix was shown off last October, it shouldn't be much longer before we get details...

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NASA launches satellite to relay data from Hubble, ISS and other spacecraft

 NASA launched a new satellite on Friday morning, aboard a United Launch Alliance (ULA) Atlas V rocket from Cape Canaveral. The launch occurred at just before 8:30 AM ET, after a brief delay from its original planned launch due to a minor technical issue with the booster that was promptly corrected by the launch team. The satellite, TDSRS-M, will make its way to orbit and then add its… Read More
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Acura And Penske’s New 2018 Daytona Prototype Looks Downright Mean

The new Daytona Prototype from Acura has officially been revealed, with Team Penske fielding it in the IMSA WeatherTech SportsCar Championship next year

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Alt-Light Goons Humiliated After Boston 'Free Speech' Rally Swarmed With Counter-Protesters

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Last week’s violent, unhinged white supremacist rally in Charlottesville, Virginia, which culminated in a terror attack which killed Heather Heyer and wounded dozens of others, seems to have left the digital far-right in a sorry state indeed.

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New procedures for SFO following AC759 incident

Planes arriving at San Francisco International Airport after dark will soon face new requirements, especially when one runway is closed. The FAA issued revised policies following the Air Canada A320 incident last month where the inbound plane passed over an active taxiway rather than the runway, coming scarily close to a tragedy.

Details from the FAA on the AC759 incident, including positional data and time stamps.

Details from the FAA on the AC759 incident, including positional data and time stamps.

The new rules require that aircraft landing at night while one runway is closed use instrument landing systems or satellite-based approach guidance rather than visual approach, the scenario governing the AC 759 flight. Adding the systems-based guidance into the approach will reduce chances of an inbound aircraft lining up wrong when one runway is closed and dark.

The rules also change the staffing at the ATC tower, requiring a second controller in the tower “until the late-night arrival rush is over” according to a statement shared by FlightGlobal. At the time of the incident only one controller was on duty and, based on the transcripts of the communications, it appears that a couple opportunities to notice the mis-aligned approach were missed.

NTSB releases initial details on AC759 SFO incident

As ACA759 approached SFO, at 2355:52 PDT, the airplane flew too far right of course to be observed by the local controller’s ASDE-X/ASSC and was not visible on the ASDE-X/ASSC display for about 12 seconds.

At 2355:56 PDT, when ACA759 was about 0.3 mile from the landing threshold, the local controller confirmed and recleared ACA759 to land on runway 28R.

As I mentioned when previously writing about the incident, the controller did not have the plane visible on the surface radar screen and still cleared the landing, even after the pilot expressed some concern. This appears an unusual set of circumstances and the FAA responded nearly immediately to address potential workload challenges that may have contributed to that aspect of the circumstances.

Ultimately aviation remains incredibly safe because so many different parties are all participating in the process and working towards that goal. When mistakes are made or flaws identified changes are implemented to prevent them from repeating. To me this is a great example of recognizing a problem and quickly making multiple adjustments to reduce the chances of a repeat performance.

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Encryption Technology Could Protect the Privacy of Your DNA 

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Your DNA is some of the most intimate information out there—encoded in it is information about your health, your personality, your family history. It’s not hard to imagine how such sensitive details could be damaging should they fall into the wrong hands. And yet, the privacy practices of the people and programs…

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Google figured out how to flawlessly remove stock-photo watermarks

image27.pngWatermarks are placed on copyrighted images like stock-photos in order to keep people from using them without permission or without paying. And manually removing them requires Photoshop skills, time and being ok with the image not looking its best po... http://ift.tt/2v9bRPS
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