Please create an account to participate in the Slashdot moderation system


Forgot your password?

Comment: Re:With the best will in the world... (Score 1) 185

Well one of the biggest limitations for wind and solar is that they're unreliable in terms of availability. We don't have the storage technology available to achieve greater than around 20% grid penetration of wind/solar anywhere except for a small handful of places (namely Denmark, who is next to Norway, who have a HUGE hydro power reserve that they can throttle up/down in response to Denmark's supply/demand.)

If this new process can throttle efficiently depending on how much input power is available, it might be a solution to the storage problem.

Comment: Re:File manager without file, edit, view.. (Score 1) 397

by squiggleslash (#49560319) Attached to: Debian 8 Jessie Released

They did include a "classic mode" from the start. It was originally called "Fallback". Over time they've updated how and why they implemented it, but the classic desktop was never really removed, just hidden behind absurd levels of obfuscation because they really thought you'd like GNOME Shell if only you'd use it.

Comment: Re:With the best will in the world... (Score 2) 184

There's no Nitrogen in the diagram, so I'm guessing not.

Essentially they're reformulating the pollution burning the fuel will put out. In goes CO2 mixed with Hydrogen and Oxygen (at different stages), and out comes the fuel. Fuel burns, out goes CO2 and water. It's in theory a closed cycle, as long as renewable electricity is used to separate the H2O and power the rest of the process.

The major concern I have is that it doesn't look terribly scalable, but I'm not a chemist.

Comment: Re:KDBus - another systemd brick on the wall (Score 1) 153

by squiggleslash (#49559755) Attached to: Linux 4.1 Bringing Many Changes, But No KDBUS

Maybe you're hearing it a lot because you're participating in a group that keeps quoting stuff out of context in order to try to make something look bad. I'm not trying to be mean, but that's a good sign that you're arguing not in good faith, but because of gut feel about something. If SystemD was bad, you wouldn't need the out-of-context stuff, as it'd be easy to point at things that exist, and say "Look, here, that's a problem."

Comment: Re:"although not with bug-free results" (Score 2) 89

by Andy Dodd (#49559695) Attached to: Google Officially Discontinues Nexus 7 Tablet

The article was pretty poor.

There were two Nexus 7 devices:
1) The 2012 Nexus 7 (often referred to by its internal codename, grouper), using an NVidia Tegra3 chipset. This did get Lollipop, although it was kind of "meh", mostly with performance issues, showing that the hardware was getting a little on the old side. Google may have been trying to make up for the Galaxy Nexus getting dropped prematurely due to TI by keeping a different Nexus device supported for as long as absolutely possible. This device was discontinued in Summer 2013 when its successor was announced.
2) The 2013 Nexus 7 (often referred to by its internal codename, flo), using a Qualcomm Snapdragon S4 Pro (APQ8064), pretty much the same as the Snapdragon 600 at a slightly lower clock speed. This runs Lollipop well due to newer hardware. This is the device that was just discontinued.

grouper was always a bit "meh" - I don't know if it was the fault of Asus or NVidia, but Tegra3 tablets from Asus were always notorious for poor storage performance. I think other Tegra3 tablets had similar issues, but honestly - Asus was the largest Tegra3 customer by far thanks to grouper and the Transformer series of tablets, so it's hard to tell who was at fault.

The fact that flo didn't have grouper's storage performance issues (same device manufacturer, different chip inside) indicates it was probably the Tegra3.

Comment: Re:KDBus - another systemd brick on the wall (Score 1) 153

by squiggleslash (#49559623) Attached to: Linux 4.1 Bringing Many Changes, But No KDBUS

SystemD doesn't in any way resemble the "Windows way", stop being ridiculous.

As for the kernel and SystemD being linked, I don't see a problem as long as the distro makers recognize that and bundle the two together. Kernels are always installed with a group of support files that they hard depend upon, notably the modules. As long as multiple versions of the kernel-dependent SystemD can be installed, and grub is set up properly to ensure each kernel points at the right version, there shouldn't be an issue.

If there ever is, it means a problem with that distro.

Comment: Re:Wounded Not Dead (Score 1, Informative) 153

by squiggleslash (#49559457) Attached to: Linux 4.1 Bringing Many Changes, But No KDBUS

There's nothing stopping you from running Linux with SysV Init. You won't be able to use modern versions of GNOME (but who does?), and you won't be able use the major distros, but if that's what you want, by all means go for it. Linux (in terms of what we're talking about here - ie the thing called "Linux" that has a version number of 4.1) is only one component of the operating system, and doesn't have SystemD as part of it.

But bear in mind that SysV Init has been straining at the seams now for around two decades, probably more. When it was written it was rare for a Unix system to fail to boot for any reason other than a hardware fault or disk corruption. The notion a minor misconfiguration of a networking script could take down a machine was unthinkable back then.

Bear in mind SysV init was never upgraded to take into account changing usage. Take a look at /etc/inittab. Try and find a man page that still describes the format. Ask yourself why it exists. Ask yourself why, bearing in mind it does, inetd is a completely different, unrelated, system. Ask yourself why sshd exists and why those connections aren't managed by inetd or init.

Bear in mind that Linux the kernel has had some major security and process management systems now for over half a decade that SysV init is incapable of using - and always will be. That those security and process management systems, if used, significantly improve both the security and reliability of Linux based operating systems by making it easier to, amongst other things, truly sandbox processes in a way superior to BSD's jails feature. Ask yourself why we should be prevented from using them simply because the operating system's daemon management system doesn't support anything the AT&T kernels didn't support in 1983..

Bear in mind that SysV Init's faults are so obvious to people who actually build operating systems that SystemD isn't even the first try at this, that Upstart was considered "very nearly there" as a suitable replacement, and that the real debate was between SystemD and Upstart, not SystemD and SysV init.

Finally bear in mind that SystemD is a true superset of SysV Init in terms of functionality. This isn't the Wayland/Mir "Let's throw the baby out with the bathwater because there's too much spaghetti code" nonsense, there's nothing you can do with SysV Init that can't be done with SystemD. Except it's much, much, harder now to hose your configuration so badly that it's not going to come up because an NFS share wasn't available when you rebooted your computer.

Comment: Re:sage (Score 5, Interesting) 281

by nbauman (#49557569) Attached to: The Future Deconstruction of the K-12 Teacher

The people who put down public schools and experienced union teachers are "visionaries" but they don't have facts to back them up. If you want the facts, do a Google search for "Diane Ravitch."

Ah yes, a single data point proves everything. Sorry. No.

I have had exceptional public school teachers that cared about the students, knew their material, and provided a rich, learning environment. I have had hideous public school teachers that made it obvious that they hated the students, wished they were elsewhere, and only because thy had been on the job so long and were tenured that it was too late to change careers at that point. I have had public school teachers at almost every point in between.

I'm extremely glad that you had only exceptional experiences with public school teachers. But please, don't start pretending that you're representative of all public school students' experience or that your teachers were representative of all public school teachers.

Do your homework. I said do a Google search for "Diane Ravitch." Do I have to do everything for you?

Ravitch was assistant secretary of education under GWHB and Bill Clinton. She believed in testing and charter schools and getting rid of unions. The Wall Street Journal gave her a column. But she knew how to understand data. And the data said that charter schools were failing and the testing was unscientific gobbledygook. So -- unlike some people -- when the evidence went against her, she admitted she was wrong. She has more data than you knew existed. For example, she knows about the NAEP which actually did a good, scientific study of charter schools and found that they were on average worse than public schools. And I'm not going to find it for you, you can look it up yourself, although you're probably too lazy for that.

There's plenty of data. And it doesn't do what the "visionaries" say. Most of this stuff has been tried before, and didn't work.

I didn't say that I had only exceptional experiences with public school teachers. I had good teachers and bad teachers, like every institution. but most of them -- enough of them -- were good. I found more dedicated people in the public schools than I found in private businesses.

Comment: Re: Do not (Score 1) 124

by PopeRatzo (#49557337) Attached to: Liquid Mercury Found Under Mexican Pyramid

A bunch of workers hanging their body weight on the lever end would raise the stone a foot or two. You prop the stone with some timbers, shorten the lifting rope, and repeat. When the stone gets to the next level of the pyramid, you rotate the lever arm horizontally and pivot the stone to the next step.

Sounds plausible, except how does that lever get the stones to the top of a 455' structure? The widest "step" doesn't seem like it would allow room for enough guys to exert 800 lbs on a lever, much less for the lever itself. And we're talking a pretty long lever by the time you get halfway up. Then, you've got all the limestone sheathing to put up and you have to make sure the inside chambers are there, and accessible..

However they did it, it's pretty remarkable. I got to see it once up close and it's amazing.

+ - Another billionaire lobbys for education->

Submitted by nbauman
nbauman writes: James P. Steyer came here from San Francisco last week on a whirlwind tour to try to engage the country’s power brokers in his new crusade to put children and education at the top of the nation’s political agenda.

[blah blah blah digital literacy new media Internet for schools broadband for poor kids technical education for students and teachers privacy think of the children]

“What you’re seeing is an organization pushing an agenda to improve education through technology coinciding with the self-interests of companies providing funding to that organization,” said Joel R. Reidenberg, a professor at the Fordham University School of Law in Manhattan. “If you had municipal governments providing Wi-Fi in poor neighborhoods, you wouldn’t need to subsidize the private sector to do it.”
Turning a Children’s Rating System Into an Advocacy Army
New York Times
APRIL 26, 2015

Link to Original Source

Comment: Re:This plan has holes (Score 1) 281

by nbauman (#49557039) Attached to: The Future Deconstruction of the K-12 Teacher

I dunno. I'm not an educator, but I'm pretty sure that when I was in school that there was more to the class than just the lecture. I don't think you can just roll a copy of something from "The Great Courses" and declare yourself done.

I would be very worried about any teacher that would reduce their own job to that.

This reveals my age, but I remember when I was waiting in my home room in the morning and some of the kids in the back of the room were excited about something.

A kid had just built one of the first transistor radios from schematics.

I saw a transistor for the first time.

It was not in the textbooks.

If a 6600 used paper tape instead of core memory, it would use up tape at about 30 miles/second. -- Grishman, Assembly Language Programming