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Submission + - openSUSE Leap 42.1 released (opensuse.org)

MasterPatricko writes: In what they're calling the first "hybrid" distribution release, the openSUSE project have announced the availability of openSUSE Leap 42.1. Built on a core of SUSE Linux Enterprise 12 SP1 packages but including an up-to-date userspace (KDE Plasma 5.4.2, GNOME 3.16, and many other DEs), Leap aims to provide a stable middle ground between enterprise releases which are quickly out of date, and the sometimes unstable community distros. DVD/USB or Network Install ISOs are available for download now. For those who do prefer the bleeding edge, the openSUSE Tumbleweed rolling-release distribution is also available.

Submission + - openSUSE 13.2 released (opensuse.org)

MasterPatricko writes: The latest version of the openSUSE distribution, 13.2, has been officially released. Key features include integrated support for filesystem snapshots, enabled by a switch to btrfs as the default file system, a new network manager (Wicked), as well as the usual version updates. This release includes seven supported desktop environments (KDE 4.14, GNOME 3.14, Xfce, LXDE, Enlightenment 19, Mate and Awesome) and even preview packages of Plasma 5.1, all presented with a unified openSUSE theme. Download LiveUSB and DVD images now from http://software.opensuse.org/132.

Submission + - openSUSE 13.1 released, reviewed! (muktware.com)

sfcrazy writes: openSUSE teams just announced the release of openSUSE 13.1 and it has already been reviewed. There are some core points which sets openSUSE apart from populist OS Ubuntu. While Ubuntu has become more or less Canonical owned project, openSUSE is becoming more and more community driven project and looking at the recent controversies around Ubuntu and their move towards mobile platforms, openSUSE seems to be a great option for desktop users.

Comment Re:Another advantage (Score 1) 153

I've heard humans taste bad (c.f. animals that take a bite of humans spit us out / don't take another one) and we're probably not very efficient meals compared to fatty seals or muscley fish, so I doubt there is any evolutionary advantage to sharks becoming better human predators.

Comment Re:Same as last time (Score 4, Insightful) 559

Small fuel efficient cars have a huge problematic bug , that has never been worked out. They're dangerous, hard to spot, slow to get out of the way

As evidenced by your own statement it's the huge speeding behemoths that are actually the ones causing the accidents, even if it's those around them that suffer the consequences ... and yet you claim it's the small cars that should be removed from the road?

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.

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.


Submission + - openSUSE 12.2 is out! (opensuse.org)

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.

Download openSUSE 12.2 from any of our mirrors."

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