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Cause of LED Efficiency Droop Finally Revealed 308

Posted by Soulskill
from the it-was-the-daleks-all-along dept.
An anonymous reader writes "Researchers from the University of California, Santa Barbara, in collaboration with colleagues at the École Polytechnique in France, have been able to prove the theory behind LED 'droop.' LED droop is the term for how LEDs emit less light when the amount of current being pushed through them goes above a certain level. 'The cost per lumen of LEDs has held the technology back as a viable replacement for incandescent bulbs for all-purpose commercial and residential lighting.' Now that we understand what causes this, we should start to see research go into technology to circumvent LED Droop. 'LEDs have enormous potential for providing long-lived high quality efficient sources of lighting for residential and commercial applications. The U.S. Department of Energy recently estimated that the widespread replacement of incandescent and fluorescent lights by LEDs in the U.S. could save electricity equal to the total output of fifty 1 GW power plants.'" A pre-print of the team's paper is available at the arXiv.

FAA On Travel Delays: Get Used To It 720

Posted by Soulskill
from the TSA-beat-you-to-the-punch dept.
coondoggie writes "The term sequestration has certainly become a four-letter word for many across the country — and now you can count business and regular traveling public among those hating its impact. The Federal Aviation Administration today issued a blunt statement on the impact of sequestration on the nation's air traffic control system, which this week begain furloughing about 10% of air traffic controllers for two days or so per month. It reads as follows: 'As a result of employee furloughs due to sequestration, the FAA is implementing traffic management initiatives at airports and facilities around the country. Travelers can expect to see a wide range of delays that will change throughout the day depending on staffing and weather-related issues. ... Yesterday more than 1,200 delays in the system were attributable to staffing reductions resulting from the furlough.'" U.S. Democrats and Republicans spent the day using the FAA's statement as political fodder rather than working on resolving sequestration.

Millennials Willing To Share Personal Data — For a Price 88

Posted by Soulskill
from the will-also-get-off-your-lawn-for-a-price dept.
jfruh writes "The rap on the under-30 crowd is that they don't care anywhere near as much about online privacy as their elders — but that's not quite true. According to a recent study by USC's Annenberg Center for the Digital Future, millennials are just as concerned about the use of their personal data online as their elders. The difference arises when it comes to why they share that data: older users share with someone they trust, while millennials share when they perceive that there's something in it for them."

Fukushima Nuclear Plant Cleanup May Take More Than 40 Years 218

Posted by Soulskill
from the public-to-forget-about-it-within-40-months dept.
mdsolar writes "'A U.N. nuclear watchdog team said Japan may need longer than the projected 40 years to decommission the Fukushima power plant and urged Tepco to improve stability at the facility. The head of the International Atomic Energy Agency team, Juan Carlos Lentijo, said Monday that damage at the nuclear plant is so complex that it is impossible to predict how long the cleanup may last.' Meanwhile, Gregory B. Jaczko, former Chair of the Nuclear Regulatory Commission has said that all 104 nuclear power reactors now in operation in the United States have a safety problem that cannot be fixed and they should be replaced with newer technology."
The Almighty Buck

Apple To Launch Largest Stock Repurchasing Plan In History 282

Posted by Soulskill
from the not-sure-if-confidence-or-overconfidence dept.
An anonymous reader writes "In conjunction with its earnings report for the second quarter of 2013, Apple issued a press release announcing some major plans for its ever growing stockpile of cash. It is increasing its quarterly dividend payout to investors by 15%. What's more, the company will spend $60 billion in stock repurchases, making it in Apple's words, 'the largest single share repurchase authorization in history.'"

Radioactive Bacteria Attack Cancer 53

Posted by Soulskill
from the incorporate-lasers-and-you've-got-yourself-a-customer dept.
ananyo writes "Two dangerous things together might make a medicine for one of the hardest cancers to treat. In a mouse model of pancreatic cancer, researchers have shown that bacteria can deliver deadly radiation to tumours — exploiting the immune suppression that normally makes the disease so intractable. The researchers coated the bacterium Listeria monocytogenes with radioactive antibodies and injected the bacterium into mice with pancreatic cancer that had spread to multiple sites. After several doses, the mice that had received the radioactive bacteria had 90% fewer metastases compared with mice that had received saline or radiation alone."

Hands-Free Or Voice-Activated Texting Not Safer 157

Posted by Soulskill
from the guess-everybody-will-have-to-go-back-to-doing-it-the-old-way dept.
Meshach writes "A recent study (PDF) detailed in the Washington Post verifies that using hands-free or voice-activated texting is no safer than texting with your hands while you are driving a car. Using a handheld device to tap out a text message while driving has been banned in many states and provinces. From the article: '"One of the common comments was that they felt an inclination to look down at the screen to see if it heard them correctly, so that could be one possible explanation of why they were not looking at the roadway more frequently," Yager said. She said drivers said they felt safer when using voice-activated texting than when entering messages on a keyboard. "Perhaps it is because they view it as safer and therefore it must be, but still they have this inclination to look down at the screen," she said. "We found that their driving performance suffered equally with both methods." As has been proven in studies of cellphone conversations, Yager said drivers engaged in any form of texting were distracted by the communication effort.'"

Overconfidence: Why You Suck At Making Development Time Estimates 297

Posted by Soulskill
from the i-blame-the-schools dept.
Dan Milstein from Hut 8 Labs has written a lengthy post about why software developers often struggle to estimate the time required to implement their projects. Drawing on lessons from a book called Thinking Fast and Slow by Dan Kahneman, he explains how overconfidence frequently leads to underestimations of a project's complexity. Unfortunately, the nature of overconfidence makes it tough to compensate. Quoting: "Specifically, in many, many situations, the following three things hold true: 1- 'Expert' predictions about some future event are so completely unreliable as to be basically meaningless 2- Nonetheless, the experts in question are extremely confident about the accuracy of their predictions. 3- And, best of all: absolutely nothing seems to be able to diminish the confidence that experts feel. The last one is truly remarkable: even if experts try to honestly face evidence of their own past failures, even if they deeply understand this flaw in human cognition they will still feel a deep sense of confidence in the accuracy of their predictions. As Kahneman explains it, after telling an amazing story about his own failing on this front: 'The confidence you will experience in your future judgments will not be diminished by what you just read, even if you believe every word.'"

BitTorrent Opens Up Its Sync Alpha To the Public For Windows, Mac, and Linux 49

Posted by Soulskill
from the solutions-in-search-of-problems dept.
An anonymous reader writes "BitTorrent on Tuesday announced it has released its file synchronization tool Sync into open alpha. You can download the latest version now for Windows, Mac, and Linux over at The company first announced its Sync software back in January, explaining at the time that it uses peer-to-peer technology to synchronize personal files across multiple computers and devices."

Tweet From Hacked AP Account Causes High Freq. Traders To Drop DOW 150 Points 314

Posted by Soulskill
from the our-culture-will-eventually-collapse-due-to-an-errant-tweet dept.
New submitter Mike Lape writes "Stocks plunged and recovered within minutes after the hacked AP Twitter account sent out a tweet that indicated that the White House had been the victim of an explosion and that President Obama had been injured. '...the Dow Jones Industrial Average took a quick 143-point plunge, before recovering most of its losses within minutes. The three-minute plunge triggered by the tweet briefly wiped out $136.5 billion of the S&P 500 index's value, according to Reuters data. Interestingly, Tuesday has been the best day of the week for the blue-chip this year with an average return of 0.46 percent. If the index closes in the black today, it will have been up for the 15th consecutive Tuesday. The last time the Dow rose for 15 straight Tuesdays was in 1927.' An analyst said, 'That goes to show you how algorithms read headlines and create these automatic orders – you don't even have time to react as a human being.'"

Will Future Tesla Cars Use Metal-Air Batteries? 171

Posted by Soulskill
from the powered-by-the-tears-of-oil-execs dept.
thecarchik writes "Most advocates and industry analysts expect lithium-ion batteries to dominate electric-car energy storage for the rest of this decade. But is Tesla Motors planning to add a new type of battery to increase the range of its electric cars? Tesla has filed for eight separate patents on uses of metal-air battery technology (for example, #20120041625). The metals covered for use in the metal-air battery are aluminum, iron, lithium, magnesium, vanadium, and zinc. Metal-air batteries, which slowly consume their anodes to give off energy, hit the news last month when Israeli startup Phinergy demonstrated its prototype battery and let reporters drive a test vehicle fitted with the energy-storage device. Mounted in a subcompact demonstration car, Phinergy's aluminum-air battery provides 1,000 miles of range, it said, and requires refills of distilled water (which acts as electrolyte in the cells) about every 200 miles."

China Behind 96% of All Cyber-Espionage Data Breaches, Verizon Report Claims 96

Posted by Soulskill
from the go-big-or-go-home dept.
colinneagle writes "Verizon's 2013 Data Breach Investigation Report is out and includes data gathered by its own forensics team and data breach info from 19 partner organizations worldwide. China was involved in 96% of all espionage data-breach incidents, most often targeting manufacturing, professional and transportation industries, the report claims. The assets China targeted within those industries included laptop/desktop, file server, mail server and directory server, in order to steal credentials, internal organization data, trade secrets and system info. A whopping 95% of the attacks started with phishing to get a toehold into their victim's systems. The report states, 'Phishing techniques have become much more sophisticated, often targeting specific individuals (spear phishing) and using tactics that are harder for IT to control. For example, now that people are suspicious of email, phishers are using phone calls and social networking.' It is unknown who the nation-state actors were in the other 4% of breaches, which the report says 'may mean that other threat groups perform their activities with greater stealth and subterfuge. But it could also mean that China is, in fact, the most active source of national and industrial espionage in the world today.'" The report also notes that financially-motivated incidents primarily came from the U.S. and various Eastern European countries.

The Dark Side of Amazon's New Pilots 312

Posted by Unknown Lamer
from the none-for-you dept.
I've been really, really excited about digital video distribution lately: first Netflix greenlights jms's return to science fiction TV, and then Amazon announces their new pilots. Perhaps the decade long dearth of any good television is nearing its end! So, with that in mind, I finished up editing Slashdot for the day and sat down to watch some of these new pilots. Only to discover that Amazon has taken away my ability to watch entirely in the name of Digital Restrictions Management.

Dropcam CEO's Beef With Brogramming and Free Dinners 400

Posted by timothy
from the why-is-the-incinerator-so-big? dept.
waderoush writes "Plenty of technology companies serve free breakfast, lunch, and dinner to their employees, but Dropcam CEO Greg Duffy says that's a form of mind control designed to get people to to work late. To keep employees happy, Duffy says, it's better to make them go home to their families for dinner. Some other suggestions from the San Francisco video monitoring startup: don't fill your engineering department with young, single, childless males (aka brogrammers). Keep your business model simple by making actual stuff that you can sell for a profit. And don't hire assholes. Why pay attention to Duffy's advice? Because Dropcam has a 100 percent employee retention rate — no one who has joined the 4-year-old company has ever left."

Ask Slashdot: Science Books For Middle School Enrichment? 203

Posted by timothy
from the summer-reading-time-approaches dept.
new submitter heybiff writes "It is the time of year where students are scrambling for extra credit assignments to boost grades. As a middle school science teacher, I want to accommodate them, while still keeping science involved; and book reports are a popular activity in my school. Unfortunately, I have only been able to come up with a short list of science related books that a 11-14 year old would or could read in their free time: Ender's Game, Hitchhiker's Guide. What books would you recommend as a good read for an extra credit book report, that would still involve a strong science twist or inspire a student's interest in science? The book must be in print, science related, fiction or non-fiction, and not be overtly objectionable or outright banned. I look forward to the submissions." "Outright banned" actually seems a rich vein on which to draw; note that not even Ender's Game is safe.

"If I do not want others to quote me, I do not speak." -- Phil Wayne