Author: kenmay

How Uber Surge Pricing Really Works

minstrelmike writes with this analysis from Nicholas Diakopoulos of the Washington Post: At the core of Uber’s wild success and market valuation of over $41 billion is its data and algorithmically fueled approach to matching supply and demand for cars. It’s classic economics, supposedly….but is Uber’s surge pricing algorithm really doing what they claim? Do surge prices really get more cars on the road? My analysis suggests that rather than motivating a fresh supply of drivers, surge pricing instead re-distributes drivers already on the road. Adds minstrelmike: The writer goes on to analyze 4 weeks of pricing info from 5 areas in D.C. and plotted prices versus wait times. “Price surging can work in any of three ways: by reducing demand for cars (less people want a car for a higher price), by creating new supply (providing an incentive for new drivers to hit the roads), or by shifting supply (drivers) to areas of higher demand.” It moves current drivers from one side of town to the other. It does not put new drivers on the road. It can’t because the prices change every 3-5 minutes.” Read more of this story at Slashdot.

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How Uber Surge Pricing Really Works

FBI Overstated Forensic Hair Matches In Nearly All Trials Before 2000

schwit1 writes The Justice Department and FBI have formally acknowledged that nearly every examiner in an elite FBI forensic unit gave flawed testimony in almost all trials in which they offered evidence against criminal defendants over more than a two-decade period before 2000. Of 28 examiners with the FBI Laboratory’s microscopic hair comparison unit, 26 overstated forensic matches in ways that favored prosecutors in more than 95 percent of the 268 trials reviewed so far, according to the National Association of Criminal Defense Lawyers (NACDL) and the Innocence Project, which are assisting the government with the country’s largest post-conviction review of questioned forensic evidence. The cases include those of 32 defendants sentenced to death. Of those, 14 have been executed or died in prison, the groups said under an agreement with the government to release results after the review of the first 200 convictions. Read more of this story at Slashdot.

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FBI Overstated Forensic Hair Matches In Nearly All Trials Before 2000

Rocket Lab Unveils "Electric" Rocket Engine

New submitter Adrian Harvey writes The New Zealand based commercial space company Rocket Lab has unveiled their new rocket engine which the media is describing as battery-powered. It still uses rocket fuel, of course, but has an entirely new propulsion cycle which uses electric motors to drive its turbopumps. To add to the interest over the design, it uses 3D printing for all its primary components. First launch is expected this year, with commercial operations commencing in 2016. Read more of this story at Slashdot.

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Rocket Lab Unveils "Electric" Rocket Engine

Norway Will Switch Off FM Radio In 2017

New submitter titten writes The Norwegian Ministry of Culture has announced that the transition to DAB will be completed in 2017. This means that Norway, as the first country in the world to do so, has decided to switch off the FM network. Norway began the transition to DAB in 1995. In recent years two national and several local DAB-networks has been established. 56 per cent of radio listeners use digital radio every day. 55 per cent of households have at least one DAB radio, according to Digitalradio survey by TNS Gallup, continuously measuring the Norwegian`s digital radio habits. Read more of this story at Slashdot.

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Norway Will Switch Off FM Radio In 2017

Comcast’s gigabit internet hits northern California in June

Comcast is bringing its twice-as-fast-as-Google-Fiber internet service to northern California. Potential customers will need installation of professional-grade equipment to access it and, you’ll have to be near its fiber network — Fresno, Monterey, Sacramento and the San Francisco Bay Area are among the places on the list — to qualify. That’s not all, either. Statewide, it’s rolling out a 250 Mbps “Extreme 250” speed tier for cable internet customers. The telecom giant’s also boosting speeds on its existing tiers as well, with lower priced-plans getting jumps from 25 to 45 Mbps depending on the package at no added cost. Perhaps the best news about all this is that you won’t have to wait too much longer for it all to take effect. Comcast says it’ll start the cable internet upgrades in May with continued rollouts taking place the rest of the year, while the 2Gbps fiber service starts rolling out in June. And just like that, there’s another gigabit competitor in Google HQ’s vicinity with Fiber nowhere in sight. [Image credit: Shutterstock] Filed under: Internet , HD Comments Source: Comcast

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Comcast’s gigabit internet hits northern California in June

Incorrectly Built SLS Welding Machine To Be Rebuilt

schwit1 writes A giant welding machine, built for NASA’s multi-billion dollar Space Launch System (SLS), has to be taken apart and rebuilt because the contractor failed to reinforce the floor, as required, prior to construction: “Sweden’s ESAB Welding & Cutting, which has its North American headquarters in Florence, South Carolina, built the the roughly 50-meter tall Vertical Assembly Center as a subcontractor to SLS contractor Boeing at NASA’s Michoud Assembly Facility in New Orleans. ESAB was supposed to reinforce Michoud’s floor before installing the welding tool, but did not, NASA SLS Program Manager Todd May told SpaceNews after an April 15 panel session during the 31st Space Symposium here. As a result, the enormous machine leaned ever so slightly, cocking the rails that guide massive rings used to lift parts of the 8.4-meter-diameter SLS stages The rings wound up 0.06 degrees out of alignment, which may not sound like much, “but when you’re talking about something that’s 217 feet [66.14 meters] tall, that adds up, ” May said. Asked why ESAB did not reinforce the foundation as it was supposed to, May said only it was a result of “a miscommunication between two [Boeing] subcontractors and ESAB.” It is baffling how everyone at NASA, Boeing, and ESAB could have forgotten to do the reinforcing, even though it was specified in the contract. It also suggests that the quality control in the SLS rocket program has some serious problems. Read more of this story at Slashdot.

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Incorrectly Built SLS Welding Machine To Be Rebuilt

Solar powered Blue Cell provides cellular backhaul without wires

As we mentioned in our earlier coverage of LINK , Bell Labs is expecting that the near future will bring a lot of growth in cellular devices, like smart appliances and sensors. Part of its solution to this flood of new devices is to give them their own chunk of the spectrum to keep them from getting in the way of user-driven devices, like phones and tablets. But that’s only part of the solution; phone and tablet traffic is going to climb as well. The solution there is simply to create more cells so that there are fewer devices talking to a single base tower. But adding more access points isn’t a simple matter. Each requires power and a network connection, and constructing large towers can be a headache of siting permits and contracts. To address this, a research effort at Bell Labs called “Blue Cell” is attempting to simplify cellular access points by getting rid of the wires. As solar panel prices have plunged, getting rid of the power cord has gotten a lot easier. Of course, siting a large solar panel can be just as much trouble as siting a cell phone tower, so one of the major goals of the research was to reduce the energy requirements of a cellular access point. Examining the existing hardware, engineers found that the biggest energy draw was the digital signal processor, which converts the cellular signal into something that can be sent over network cables. Read 3 remaining paragraphs | Comments

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Solar powered Blue Cell provides cellular backhaul without wires

America Should Envy This Speed Record-Shattering Japanese Bullet Train

The Central Japan Railway Company’s maglev bullet train hit 366 miles per hour yesterday in a test, a record-setting clip that breaks the the 12-year-old landspeed record of 361 mph, the Wall Street Journal reports . Read more…

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America Should Envy This Speed Record-Shattering Japanese Bullet Train

Verizon’s new “Custom TV” is small step toward a la carte pricing

The dreaded pay-TV bundles that result in US homes watching only about 10 percent of the channels they pay for aren’t going away any time soon, but Verizon’s FiOS TV service is taking a small step in the right direction. Starting Sunday, new and existing FiOS customers will be able to choose from new “Custom TV” bundles that offer more flexibility and could (depending on one’s interests) save subscribers a bit of money. Verizon’s new Custom TV pricing, available beginning Sunday. 6 more images in gallery “It’s a simple way for customers to choose the types of channels they want without paying for those they don’t,” Verizon said in a description of the new pricing system that was e-mailed to reporters. Read 9 remaining paragraphs | Comments

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Verizon’s new “Custom TV” is small step toward a la carte pricing