Catch up on stories from the past week (and beyond) at the Slashdot story archive

 



Forgot your password?
typodupeerror

Comment Re:Storage? (Score 5, Informative) 571 571

You use the electricity and solar heat to create methane with a Sabatier reaction, and dump the methane into the national natural gas pipeline system. The gas becomes part of the 7-30 day reserve supply and runs the gas turbine peaking plants. There is a German pilot plant that has been running since 2012 and further development is planned.

https://en.wikipedia.org/wiki/Power_to_gas has more information.

Comment Re:What's the point? (Score 1) 216 216

I've been using KDE for a long time. I haven't done anything with Gnome since the "Let's remove all the confusing options" movement started.

Thank you for the information, but I haven't been inspired to do any work to improve UI behavior over WAN connections. Years and years ago the worst UI behavior I saw was for a connection that was running over a 26.5 dial up connection. Strangely enough, some X apps were actually still usable. But, most weren't, and some took an hour to paint the first window. The worst ones seemed to be behaving like gimp did, causing a continuous stream of unnecessary synchronous calls to the X-Server.

Comment Re:What's the point? (Score 1) 216 216

I never said that there weren't other ways to do it. I just described what worked for me and how well.

I've been using X since it was X10, that includes all levels of programming from bare Xlib up. I've never written a server extension, but I have worked on the Matrox mga Linux kernel module just enough to make it work on IBM RS-6000 systems (you can grep for my last name in the kernel source if you care to check). I've also done a bit of messing about with the Doom3 sources to make it work better with Xinerama on a multi-screen setup.

By the way, I've still haven't seen a window layout object that works as well as the Motif Form Widget.

X-Windows can be doing either remote drawing command or sending blobs of pixels, it's all within the protocol. So, the only way to tell is to get something like xscope into the picture and see how the application is handling the data. One of the better ways to handle general window drawing (not pictures or video or other random pixels) is to send the drawing commands to the server to draw into an off-screen pixmap in the X-server, then have the X-server do a blit from the off-screen area to the viewable screen buffer.

So, yes, I can know its not falling back to some non-X compatibility layer.

Mostly these days I don't bother with xscope, because performance is pretty good. The last time I used xscope was when I thought Gnome was pretty neat, but wondered why remote performance was so poor. When I ran gimp through xscope I saw what seemed to be the toolkit asking the X-Server thousands of times how big its window was. Every one of those calls had to be synchronous and had to make a round trip to the X-Server and back. I never saw if they fixed that, but the proper way to deal with window sizes in X-Windows is to track the window size in local variables that are updated by the X-Windows event notifications the come every time the window changes.

Comment Re:What's the point? (Score 5, Interesting) 216 216

This statement is fundamentally crap. Every day I run multiple kde 4 applications on multiple systems back to a single desktop with ssh. The applications are not degraded and I don't have to disable any X11 features to do it. Occasionally I even use OpenGL applications remotely and they perform just fine.

Comment Re:Tubes (Score 1) 226 226

And one of the things that is observed is that the energy of the emitted photon is observed by an external observer to be altered by the kinetic energy of the moving origin. In the direction of travel the photon will be observed to have been blue-shifted, in the opposite direction it will be observed to have been red-shifted.

Comment Re:Strangely mixed signals here (Score 1) 268 268

Because the ice only exposed to the ocean water on the bottom. On the top is air, and on the sides is either land mass or more ice. One of the ideas for why the area of Antarctic ice is increasing is because the new ice is frozen fresh water from the ice melt. The fresh water, being less dense than the salt water floats on top of the more saline ocean water. And, because it has less salt in it, the freezing point is higher, so it's easier to freeze. VOLUME is AREA*depth. Decrease the depth and the VOLUME drops.

Then there's the cube-squared law, for a given VOLUME, increasing the surface AREA by decreasing the depth, increases the heat transfer capability. So, thinner ice over a larger area can give off or absorb heat more quickly. If the average temp is below freezing, you'll observe more heat given off to the surroundings and more ice forming, if the average temp is above freezing you'll observer more heat absorbed from the surroundings and more ice melting.

Comment Re:Elementary physics (Score 1) 268 268

The Antarctic ice cap is up to 45.5 million years old. 3000/45,500,000 = ? Then subtract some for the interglacial periods in the last 45.5 million years. That makes the accumulation rate miniscule. As well as having nothing to say about the current rate of accumulation.

QED is apparently mistranslated in this case.

Comment Re:not significant (Score 1) 268 268

The article says that the melting is increasing sea level by 0.16 mm/year (of 2.6 to 2.9mm total sea level rise/year). And the estimated melted mass is 65 Gigatons/year.

What does your authoritative source have for the measurements of increasing Antarctic Ice mass? Especially in the interior of Antarctica (which is officially a desert climate)?

Comment Re:Melting is normal (Score 1) 293 293

"Should" means "if this interglacial period were repeating the cycle of previous interglacial periods, the world should be cooling down".

I would classify avoiding having glacial ice sheets covering large tracts of the northern hemisphere as a good thing, yes. As in almost everything, moderation is best.

Never appeal to a man's "better nature." He may not have one. Invoking his self-interest gives you more leverage. -- Lazarus Long

Working...