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Comment Re:How many digits to use (Score 1) 174

The precision of the calculation can only be as good as the precision of the measurements. With mirrors and lenses we can use interference patterns to measure differences on the order of a wavelength of light. With spacecraft we can make some impressive measurements of velocity, mass, acceleration position using inertial guidance but that is at some level a mechanical measurement. Back to the mirror. Sixteen significant digits of Pi is 3.141592653589793 which should be adequate for calculations involving light which has wavelengths of 400nm to 700nm or .000 (milli) 000 (micro) 400 (nano) nnn (pico) nnn (femto) which gets you out to fifteen significant digits. BTW I once told some managers I worked for:. "If builders built buildings the way analysts design systems, the first woodpecker would destroy civilization." This was after a spec was delivered two months late and they somehow blamed the developers for being two months behind and using up all of the slack in the schedule.

Comment Re:Perhaps mdsolar should read the article. (Score 1) 170

.01 millirems is 1 BED (Banana Equivalent Dose) The amount of radiation from the potassium-40 in one banana. is a handy chart that provides a scale of radiation. There's a good entry at (It uses Randall's chart)

Comment Re:Ran Wayland on F23 for ten weeks (Score 1) 120

Is this version 0.20.3 what you're talking about? I'll give it a shot when I have some time. [djl@Tesseract ~]$ dnf list enlightenment*
Last metadata expiration check performed 13:01:57 ago on Sat Mar 5 09:55:42 2016.
Available Packages {snipped for brevity}
enlightenment.x86_64 0.20.3-1.fc23 updates
enlightenment-data.noarch 0.20.3-1.fc23 updates
Will it do anything rude like load a screen locker that runs even when Gnome is started. xfce did this to me and the UI was so primitive I thought it was malware trolling for my password.

Comment Ran Wayland on F23 for ten weeks (Score 1) 120

I ran Wayland during F23 Beta and on F23 for about ten weeks. It worked a lot better than in F22 but still has some usability issues. A couple of examples: In gedit the user should be able to drag a tab to a new window. In Wayland this causes gedit to crash. In XWayland apps such as Firefox or LibreOffice, the cursor will randomly disappear. Once that happens you have to restart Gnome. I am a bit frustrated with the lack of Wayland fixes in F23 promised here That being said I encourage anyone running F23 to try Wayland. Most of the time you won't notice a difference. I'll run it on a spare system when F24 beta lands.

Comment Re:Republicans don't give a damn about the law (Score 1) 69

Comments like this are why I seldom waste time at Slashdot. The scheme of using a state court judge to authorize the warrants was developed during the BHO administration. "The number of wiretaps authorized in Riverside County started to climb in 2010; it quadrupled by 2014, when the county court approved 624 wiretaps" Who was president in 2010? Who held the reins of the DEA between 2010 and 2014?

Comment Linus is damaging the reputation of Linux (Score 1, Insightful) 1501

Linus is damaging the reputation of Linux one profane outburst at a time. His conduct towards the developers, abusive language and such would get you fired in any Fortune 500 environment. CIO's will read about the petulant profane behavior in industry rags and ask themselves if they want to build an enterprise around software controlled by someone who cannot control his own emotions. Professional behavior is not about fake politeness or passive aggressive behavior. Professional behavior is about engaging your peers in civil discourse. You can say something is broken or the code is wrong with critical analysis and without angry profane screeds.

Comment Re:Eh (Score 1) 129

Wasn't Bose behind the "direct reflecting" loudspeaker? It couldn't have been designed by an engineer with a basic understanding of reflected waveforms, phase and wave interference. I listened to a set of these at a stereo shop in Monterey, California back in 1983. The space in front of me with sound, but the violin solo was distorted and smeared across the space.

Submission + - Is Beyond: Two Souls Starring Ellen Page Racist? (

DavidGilbert99 writes: Beyond: Two Souls, the fourth game from French developer Quantic Dream, is set for release in October with a very realistic looking Ellen Page as its star. However video game correspondent for the IBTimes UK, Ed Smith has thrown up a question previously not raised about the game. Is it racist?
According to Smith, and based on playing a level set in Somalia when Page's character comes under attack from locals, things turn a little bit nasty:
"It's real Birth of a Nation stuff, with a young American white girl being terrorised by animalistic black men. It's very ugly and testament I think to Cage's total lack of self-awareness as a writer."

Submission + - Computer trading and dark pools (

Bob the Super Hamste writes: CNN Money has an article on computerized trading specifically the non-public markets that are often used to execute orders. The company that the article discusses executes 1/8 of all stock trades in the US or about 900 million trades a day, for comparison the NYSE executes about 700 million trades. The article discusses dark pools or private markets where quotes aren't disclosed to the broader public markets. If the company is unable to fill an order from within its own dark pool it will submit the order to the broader public market, 13 public exchanges, as well as up to 20 other private dark pools. The quotes offered by the private dark pools by law have to be the same or better quote than those offered on public exchanges. There have been recent questions about whether the quotes provided by dark pools have been the best for customers and there is a current investigation by FINRA into the methods used by market makers and dark pool operators to fill orders.

Comment Re:Depends on the energy source duh! (Score 1) 775

Did you factor in the energy required for building and maintaining the wind turbines? Are they as green as you think?
14,000 Abandoned Wind Turbines in the USA Lays out a more comprehensive environmental cost of wind turbines including this:

Altamont's turbines have since 2008 been tethered four months of every year in an effort to protect migrating birds after environmentalists filed suit. According to the Golden Gate Audubon Society, 75 to 110 Golden Eagles, 380 Burrowing Owls, 300 Red-tailed Hawks, and 333 American Kestrels (falcons) are killed by Altamont turbines annually.

I was aware of wind turbine bird strikes. I didn't know the numbers.

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Where are the calculations that go with a calculated risk?