I also subscribe to the "great filter" theory. About 25 years after the radio was invented, we were busy gassing each other in trenches, followed closely by a global pandemic, then mass genocide, then teetering on the edge of nuclear war. That's not a very wide window for aliens to notice our presence, if they rely on artificial radio waves to detect intelligent life.

My take is that technological improvements make radio sound like noise after a few decades. Early radios systems are very simple things which have signals (CW, AM, FM, ...) that are very distinct from electrical and thermal noise. Their signals were both drastically different from, and drastically stronger than, the background, enabling simple detectors to separate a signal's information from all that chaff.

Modern radios (such as spread spectrum systems, especially OFDM) squeeze nearly the Shannon Limit out of precious bandwidth (and also be frugal with transmit power) by using nearly all of it to carry information. This makes them virtually indistinguishable from a celestial object with a little extra heat (buried among things like stars, which have a LOT of heat).

It was only about 120 years from when Hertz and Tesla started making easily detectable radio waves to the Analog Television Shutdown, a significant milepost in the decommissioning of easily detectable radio signatures. I expect that, within anther few decades, the Earth will be emitting very little that might be recognizable as a radio signature of intelligent life, unless we expend a bunch of energy sending such a signature deliberately.

So my solution to the mystery expressed in the Drake Equation is that L (the length of time for which such civilizations release detectable signals into space) is short, not due to the falls of civilizations, but to economic incentives to use the aether only in ways that are no longer noticeable at a distance.

I'm still waiting for a truly open-source, unlocked, user-controllable phone. Like a successor to Open Moko. (Building a closed platform on a base of open software doesn't cut it.)

Is anything out there or in the works?

(It's particularly acute for me just now: My decade-old feature phone started to flake out last week.)

I don't see why your BeagleBone black example is systemd's fault. It has a convoluted way of managing network interfaces because it uses connman, a network-management daemon from Intel that is not part of systemd.

I installed ubuntu 14.04 on my BBBs. (Had to upgrade the kernel a little later because the 3.13.0 kernel wasn't ported to arm-on-bone in time to go out with the original 14.04 distribution and the 2.whatever they shipped didn't handle a class of USB device I needed, but it's fine now at 3.13.6-bone8.)

Changing to a specified, fixed, IP address was just a matter of editing /etc/network/interfaces, which was commented well enough (in combination with the man page on my ubuntu laptop) to make it easy.

(Main problem was that DeviceTree overlays weren't supported by 3.13.0-6, so I had to hack the boot-time base device tree to reconfigure for the onboard device functionality I wanted, rather than just overlaying the deltas during or just after the boot procerss.)

Lots of things have happened since the dinosaurs flew away

I love that formulation.

(And just coined a related one: "... since the dinosaurs gave us the bird" B-) )

You mean everyone hasn't learned how to do that to some extent?

I do it a bit.

I get a sensation of presence of something nearby when there IS something close and I am making sounds I know I'm making (mouth clicks, footsteps, etc.) in an otherwise reasonably quiet environment, or when well-locatable sounds with bursty high-frequency components are present in the environment to provide a sonic "light source" of suitable form and predictability.

It's usually enough to keep from bumping into things. (Even soft, sound-absorbing things like plush furniture, are "visible" as a "quiet lump" - especially if there are hard things around to create acoustic contrast.)

It's not usually consciously apparent that sound is involved, rather than some "extra sense", unless there are really loud echos, like one's footsteps while walking in a concrete or tiled tunnel. (Haven't you had a sense of ambiance in such situations?)

The sensations are so well tuned as an input for moving, dodging, grabbing, and the like, that I've been assuming it's an evolved mechanism (that might have needed exercise in youth to develop properly), like vision, rather than something purely learned.

According to TFA, they're replacements for flaps or slats that are a panel, continuous with the wing surface, that flexes, rather than pivoting or sliding.

This eliminates the gap, which starts vortices (causing noise and other issues).

So wing shape changing via pivoting panels has been stock for a while, while (comparably sized) profile changes done by flexing wing sections with skins continuous with the rest of the wing are what is new.

(Note that adjusting a wing by flexing it - slightly, over its full surface - has been around for a VERY long time. The Wright Brothers used it for yaw control, though they augmented (not replaced) it with a vertical rudder, starting with the glider that immediately preceded the "first powered flight" craft.)

Flaps or slats, depending on whether they're at the front or back. They've been around for a LONG time.

Flaps and slats are a single hinged panel each. Perhaps this is more elaborate?

The Libertarian Party in the U.S. is a little hard to describe.

To understand it you also have to distinguish the party from the much broader movement. (As with small-i internet for any interconnection of diverse network types versus the capital-I Internet for the particular, big, TCP/IP-based, Connected Internet, some libertarians make the distinction between the small-l libertarian movement and the large-L Libertarian Party.)

Though the libertarian movement has broader roots, the party started as a splinter split off from the Republican party, back in the '60s or so.

It wants minimal government (but not anarchy as some would like to mischaracterize), and maximum individual liberty.

Actually there ARE "minarchist" and "anarchist" wings of the movement, if not the formal party itself. "That government governs least that governs not at all." The split is to some extent between those who think that some government is necessary to defend against attempts at more government (or those who think limited government is the best they can hope to achieve in their lifetimes) and those who think that a little governement is like a little forest fire or being a little bit pregnant.

It's based on a non-aggression principle, somewhat akin to the Golden Rule.

No first use of force. Don't hit first. There's considerable variation after that: Most think that hitting BACK is just fine, but there are pacifist libertarians.

The Party's form of it is this pledge, required of any who would join: "I hereby certify that I do not believe in or advocate the initiation of force as a means of achieving political or social goals." (That's also a sticking point for many who are supporters but not members: For instance, some think that force, threat-of-force, and some kinds of fraud are members of the class "coercion", and that any of the three is justification for the use of force in defense of self or property.)

Most libertarians also think that, once fighting starts, there's no need for proportionality or sportsmanship. (Proportioal response leads to continuous gradual escalation and debacles like the Vietnam conflict.) This is not a game - if you're justified in using force, you're justified in using enough to insure the dispute is settled. The line from Babylon 5: "Never start a fight, always finish one.", might well be a libertarian anthem.

But the non-aggression principle is the ONLY bedrock requirement, so there's a wide range of ideologies under the libertarian tent.

Basically, the idea is that virtually every human interaction should be voluntary. Consenting adults should be allowed to do what they want, but they should also bear the responsibility of their actions.

Libertarians also recognize a right to private property as being necessary for independence. (Indeed, some of them consider that private property starts with one's own body, and derive an ideology of liberty from that.)

Why is this an "ask slashdot" rather than a "slashdot survey"?

I would love to see the opposite, there is way too much daylight in the summer, but very little night sky for someone trapped in first shift like I. In the winter it would be nice to have at least an hour of sunlight when you get home for snowblowing.

Hear hear! In the summer we have more light and less darkness, so why do things to make awake-while-dark time even more scarce? (How much of the demise of drive-in theatres can be laid at the feet of the government-mandated imposition, and increases in the period of, Daylight Savings Time?)

I have for years been proposing Nightlife Savings Time as a fix: If the government MUST muck with the clocks, set them BACK in the spring, so those of us who want some dark time don't have to wait until the ground is covered with snow to get it.

Oddly, however, the Hopi have a reservation completely surrounded by the Navajo reservation, and they don't follow DST.

The Hopi and Navajo are historic blood enemies. (I understand the Navajo word for "Hopi" means "Dead man".)

That the Hopi would do something opposite from the Navajo does not surprise me at all.

Stop making shit up.

http://www.washingtonpost.com/...

Stop believing everything you read in the corporate/establishment/mainstream media without testing it - against your own experience and other sources.

Learn "critical thinking".

I'm not sure how GPS can fail? There are like 26 or so satellites over the earth. I can't imagine all 26 of them going down all at once?

For starters you need to be able to receive from at LEAST three of them simultaneously or they might as well not be up there.

There are 26 because some will be on the wrong side of the Earth, or below the horizon, or behind a building, mountain, or thick cloud. Lose a few and you have times when you can't hear at least three that well separated from your viewpoint, so you GPS doesn't work then. Lose a lot and you can almost never hear three or more at once.

So don't tell me "voter fraud is nearly non-existent". We have plenty of existence proofs

And that's ONE reason why the Electorial College, rather than at-large election of the president, is important: It provides a firewall that limits the amount of voting power a single corrupt political machine can deliver in the presidential election. (The other elected officials are by region, which limits the number of them one corrupt machine can deliver.) With popular vote one big state with a corrupted election process can swamp the rest of the country and control the White House.

Remember the Florida recount? Imagine a close presidential election if the office were by popular vote. You'd have to recount the WHOLE COUNTRY.