typodupeerror

## Comment: Re:What this means (Score 2)259

A symmetry under X means the system under test is unchanged (ie the same physical laws work, your predictions are still correct) when you do X.

A simple example is the symmetry under spatial translation -- if your experiment still behaves the same way if it's moved a meter to the left, it has "spatial translational symmetry". This symmetry isn't exactly true on the surface of the earth because of variations in the gravitational field etc., but on a small scale for lab experiments it's true, and in deep space it's certainly true. Another example is symmetry under spatial rotation -- your experiment doesn't care whether you face it north or east.

By a very cool bit of maths called Noether's Theorem, you can show that for every symmetry that a system has, there is an associated conserved quantity. So systems with spatial translation symmetry will show conservation of momentum. Systems with time translation symmetry exhibit conservation of energy -- within that system, you can't create or destroy energy. Rotational symmetry results in conservation of angular momentum.
https://en.wikipedia.org/wiki/Symmetry_(physics)

Much of modern physics is built around identifying the symmetries that the universe (or parts of the universe) obeys, the associated conserved quantities, and what happens when those symmetries are broken -- for example the maths leading to the Higgs boson. Currently we believe the universe overall obeys C(harge) P(arity) T(ime) symmetry, that is if you change matter for antimatter, flip everything spatially (as in a mirror), and reverse the direction of time, everything would be the same. This recent experiment shows that time symmetry by itself is not obeyed -- if you only reverse the direction of time, this particular particle collision is not the same.

## Comment: Re:Quick question then (Score 1)259

Photons moving through a medium are "slowed down" by interactions of the electromagnetic field with the atoms of the medium.

Remember that a photon is just localised electromagnetic energy. In a medium, the electromagnetic fields behave differently than in a vacuum, because of the all the atoms with their various charged bits (protons, electrons) -- there is a different "resistance" to changing the field strength because the field has to move the atoms as well. This resistance to changing the field strength is what determines the speed of the electromagnetic wave.
In mathematical terms we say photons (electromagnetic waves) travel at speed c/n, where n is the refractive index of the material, and n is sqrt(epsilon * mu), where epsilon and mu are the relative permittivity and permeability (to electromagnetic fields) of the medium.

A simpler, but wrong, model you might hear is that the photons are being absorbed and reemitted many times as it passes through the medium, all while travelling at c between the atoms, but that can't be really true because otherwise light would be highly directionally spread out after exiting any high refractive index material, but we can see straight through glass and water.

## + - openSUSE 12.2 is out!->

Submitted by
jospoortvliet writes "Two months of extra stabilization work have resulted into a stellar release, chock-full of goodies, yet stable as you all like it.

The latest release of the world's most powerful and flexible Linux Distribution brings you speed-ups across the board with a faster storage layer in Linux 3.4 and accelerated functions in glibc and Qt, giving a more fluid and responsive desktop. The infrastructure below openSUSE has evolved, bringing in newly matured technologies like GRUB2 and Plymouth and the first steps in the direction of a revised and simplified UNIX file system hierarchy. Users will also notice the added polish to existing features bringing an improved user experience all over. The novel Btrfs file system comes with improved error handling and recovery tools. KDE has improve its stability, GNOME 3.4, developing rapidly, brings smooth scrolling to all applications and features a reworked System Settings and Contacts manager while XFCE has an enhanced application finder.

## Comment: Re:Cross platform via wine (Score 5, Interesting)145

by MasterPatricko (#40180831) Attached to: Humble Indie Bundle V Released

disappointing, but they have an excuse, don't know how valid it really is:

from the FAQ:

Q: Why is Limbo for Linux a wrapper?
A: Unfortunately the audio for Limbo is middle-ware which could not be properly ported.

## Comment: The real reason the judge was annoyed (Score 4, Interesting)227

by MasterPatricko (#39733261) Attached to: Judge Grudgingly Awards \$3.6 Million In DRM Circumvention Case

Instead, Plaintiff merely submitted 252 raw pages of documents obtained through discovery without so much as a summary of the information contained in those documents or an explanation to the Court how any of the line items contained therein directly relate to Kumar’s UMaple activities.

Seems to me that's the real reason the judge wasn't feeling like awarding any more damages, not some kind of protest against the DMCA or statutory damages.

## + - Well that about wraps it up for superluminal neutrinos->1

Aku Head writes "The faster-than-light neutrino results that were announced last September by the OPERA group appears to be a mistake caused by a loose cable. When the connection was tightened between the computer and the GPS receiver the 60 nanosecond discrepancy went away."

## + - Arriving 60 nanoseconds too soon? Not so fast, neutrinos!->

Submitted by stillnotelf
stillnotelf writes "ScienceInsider is carrying the news that the controversial faster-than-light neutrinos detected by the OPERA experiment (covered in Slashdot here, here, here, here, here, and here) are attributable to an experimental error. Briefly, there was a mistimed connection between their GPS receiver synchronizing the experiment and the computer collecting the data. The timing was off by 60 nanoseconds — the same 60 nanoseconds by which neutrinos were arriving too early."

Submitted by smolloy
smolloy writes "It would appear that the hotly debated faster-than-light neutrino observation at CERN is the result of a fault in the connection between a GPS unit and a computer. This connection was used to correct for time delays in the neutrino flight, and after fixing the correction the researchers have found that the time discrepancy appears to have vanished."

## Comment: Re:Strange chemicals lyin' in ponds (Score 1)97

by MasterPatricko (#39046561) Attached to: Did Life Emerge In Ponds Rather Than Ocean Vents?

Listen, strange chemicals lyin' in ponds distributin' ions is no basis for a system of life. Supreme biological diversity derives from a mandate from the creator, not from some farcical aquatic ceremony!

Oh! Come and see the violence inherent in the system! Help! Help! I'm being repressed!

## Psychics Say Apollo 16 Astronauts Found Alien Ship285

Posted by Unknown Lamer
from the scully-says-yeah-right dept.
astroengine writes "A group called Transception Incorporated, self-described as an Austin, Texas-based psychic R&D operation, sent a letter (PDF) to NASA Administrator Charles Bolden that nominates the Apollo 16 crew for the Congressional Space Medal of Honor. Why? Well, a variety of 'shipwreck elements' on the Moon — described as 'structures, people/aliens, biological technology, and their plight' — were reportedly 'seen' through remote viewing (PDF) by six experts at Transception. These 'elements' can be seen, along with Apollo 16 moonwalkers John Young and Charles Duke, in photographs during that famous mission, obviously making this the first ever alien encounter."

## Comment: Re:UK University??? (Score 4, Informative)60

by MasterPatricko (#38173604) Attached to: UK University Creates First Inkjet-Printed Graphene Circuit

The first president (Henry Dunster), the first benefactor (John Harvard), and the first schoolmaster (Nathaniel Eaton) of Harvard were all Cambridge University alumni, as was the then ruling (and first) governor of the Massachusetts Bay Colony, John Winthrop.

## + - openSUSE 12.1 released->1

Submitted by MasterPatricko
MasterPatricko writes "The openSUSE project is proud to present the release of openSUSE 12.1! This release represents more than eight months of work by our international community and brings you the best Free Software has to offer. Improvements include the latest GNOME 3.2 desktop as well as the newest from KDE, XFCE and LXDE; your ownCloud made easy with mirall; Snapper-shots of your file system on btrfs; and much, much more. Other notable changes include moving from sysvinit to systemd, improving the boot process, and being built on GCC 4.6.2 including link-time optimization. More packages than ever are available from the openSUSE instance of the Open Build Service, and soon you'll be able to create customised respins on SUSE Studio."