I suspect that it was very seldom flown to New York City, however. Many millions of people would have had the opportunity to see such a flight for the first time.

And honestly, your smug dismissal of this event as being "as geektastic as a furniture shipment" marks you as being as wannabe-cool and faux-jaded as the hipster who won't listen to any band he's already heard of, because "they're so last week".

To tell the truth, I actually left the phrasing the way it was as a deliberate bit of pedant-bait. You know as well as I that the W/s was nonsensical in the context in which it was used. The fact that it is possible to combine SI units in virtually any way doesn't mean that it makes sense to do so in every situation. The original poster's comment was analogous to saying that "My bucket holds 5 liters per second." While L/s are perfectly valid if we want to talk about a flow rate, or even how fast one might use the bucket to bail out a sinking ship, it's a silly unit for talking about capacity. The fact that there exists conditions under which W/s wouldn't be nonsensical doesn't make it sensible in this particular situation.

No, it isn't--a "watt per second" is a nonsensical unit. The watt is already a rate of energy consumption, equal to a joule per second.

No, no, no. A kWh (kilowatt hour) is an amount of energy equivalent to drawing one kilowatt (one thousand watts) continuously for one hour: one thousand joules per second, times 3600 seconds per hour, gives 3.6 million joules per hour in one kWh. For comparison, one kilowatt is the amount of electricity drawn by roughly fifteen incandescent light bulbs, or by one smallish toaster. The average U.S. household uses on the order of 1000 kWh per month.

Using your estimate of 1,432,500 watts - 1432.5 kilowatts, trivially equivalent to 1432.5 kWh per hour - for the power draw for SETI@home, we get a consumption of 0.398 kWh per second. Using your figure of 6.89E-4 tons CO2 / kWh, that comes to 0.000274 tons per second, or about 274 grams (a little over half a pound -not three thousand tons - per second). In total it comes to about a ton of CO2 per day.

That's not a negligible amount of CO2. It comes out to the equivalent of the electricity use of about a thousand U.S. homes. (Note that that doesn't include household CO2 contributions from other sources, particularly fossil fuels burned for home heating, water heating, clothes drying, and transportation.) But it's also not an egregiously large amount of electricity--the U.S. has, what, a hundred million households?

While I see your point and agree with the general thrust of your post, I'm willing to call 'bullshit' even on this milder assertion about gold.

Today, gold trades for about $1600 (USD) an ounce. Ten years ago, it traded for about $400 per ounce. I can't be bothered to look up the exact numbers, but inflation in the United States probably ran about 2% per year over the same period; the price of goods denominated in USD therefore increased by 15-30% over the same period.

As far as I know, nothing happened in the last decade to so dramatically increase the intrinsic value of gold as a metal. So the difference between the 30% increase we should have seen and the 300% increase we actually saw is down to speculation and volatility. Among the putatively unstable fiat currencies, which demonstrated a decade of 10%+ per annum deflation and thereby ruined their nation's economy? Certainly none of the major reserve currencies (USD, GBP, EUR, JPY) had such troubles.

Well, no, actually.

The tenderest beef has been dead for days or even weeks. As the cells within a cut of beef die, they release enzymes that slowly digest connective tissue (mostly collagen). "Live" steaks would contain intact, live cells that wouldn't have a chance to release any digestive enzymes before being cooked.

Other posters have already observed some of the obvious flaws in this scheme.

Satellites fail, for the most part, when their rechargeable batteries quit and/or their consumable manoeuvring fuel runs out. These are among the heavier components aboard many satellites, so our hypothetical 'repair and resupply' launch is already going to be costly and heavy before you add all that unique and highly flexible hypothetical manipulator hardware. From any sort of rational economic standpoint, if you're going to launch a heavy, expensive satellite, you might as well launch a replacement (with all-new hardware, up-to-date electronics, incorporating the lessons learned from the previous iteration, etc.) instead of trying to fix or cannibalize the dodgy one in orbit.

Trying to service multiple satellites with one launch of our Swiss-Army-knife repair droid gets even worse, because manoeuvring between orbits tends to be very costly in terms of fuel (prohibitively so if a significant change in inclination is contemplated) and therefore weight.

And how user-serviceable are most satellites? Anything that's already in space now (or that is likely to be launched in the next decade) hasn't been designed to be repaired, modified, or scavenged after launch. Are we really solving the 'space junk' problem if our repair droid is inadvertently leaving behind a cloud of dropped screws and broken hardware? One satellite is easy to track and avoid. A haze of screws and plastic chips is not--and will still put a hole right through the ISS.

The folks at DARPA are sometimes crazy, but they're not usually idiots. Presumably they've been able to come up with the same objections as Slashdotters, and they probably realized them faster than we did. So what's really going on?

1) A stripped-down version of this tool could be used to attach de-orbiting or manoeuvring thrusters to disabled satellites that happened to be occupying (or threatening) particularly high-value orbital real estate. The ISS has to be periodically repositioned to avoid the occasional bit of space junk. Further up, there's a limited amount of space in geostationary orbit, and a malfunctioning satellite could be trouble as either a source of physical or radio clutter. If the program fails to produce its rather pie-in-the-sky 'dream' goal, it could still develop this useful sideline.

2) The military would love to have the capability to selectively damage, disable, and/or capture 'enemy' space hardware. This program would complete nearly all the steps required to develop such a capability, but under the shiny, happy patina of putative civilian applications.

So the answer to the Ask Slashdot question should be: "Just refer to the emergency evacuation plan you drafted years ago, and have regularly updated in the meantime."

And if that isn't the answer, why the hell not?

The point, I think, is not to conceal the existence or location of these facilities (which can, after all, be readily established using a telephone book), but rather to more-thoroughly protect the privacy of the individuals visiting or making use of them. As Google has acknowledged that their face- and number-plate-blurring algorithm is only about 99% effective, the Swiss solution is to insist on specific exclusion of these particularly-privacy-sensitive locations. (It was deemed that "Oops, we're sorry that the battered woman in the window of the shelter was part of the 1% our algorithm missed" wasn't a sufficiently robust response.)

I use Street View for when I want to know what the View is from the Street. Another poster has mentioned shopping for real estate, but that's far from the only use. I use it for the utterly prosaic purpose of identifying landmarks and storefronts when I'm planning a vacation or shopping trip to an unfamiliar destination. The top of a building just doesn't look like the side of a building.

The grandparent poster has done the calculation correctly, if it is assumed that the cracker knows that there is exactly one uppercase character.

We're all agreed that if there is a 6-letter all-lower-case password, there are 26^6 possible passwords (26 possible character choices in each of six positions), right? For five lower case letters and one upper case letter, we draw five lower case letters (26^5 possibilities) and one upper case letter (26^1 possibilities, because it can't be a lower case letter), and we have 6 choices as to where in the password we place the upper case letter: 26^5 * 26^1 * 6 = 26^6 * 6 possible passwords.

Alternatively, consider our six-letter all-lower-case password and its 26^6 possibilities. We have a dictionary that starts aaaaaa, aaaaab, aaaaac and ends with zzzzzz. If we add exactly one (no more, no fewer) capital letter, then each entry in our original dictionary is replaced by six new passwords, one with a single capital letter in each position: Aaaaaa, aAaaaa, aaAaaa, aaaAaa, aaaaAa, aaaaaA, then Aaaaab, aAaaab, aaAaab, aaaAab, aaaaAb, aaaaaB, and so forth--again giving us 26^6 * 6 possible passwords.

That said, it would be unusual for our hypothetical cracker to have access to that sort of specific information about a password. Why would he know that there was exactly one upper case letter? Far more likely would be some sort of rudimentary password screen that required our password to contain a mix of capital and lower case letters--that is, at least one upper case, and at least one lower case. In that more-likely scenario, the parent's calculation is closer to the mark. Each of six positions could have any one of 52 values (26 upper- and 26 lower-case letters), giving 52^6 possibilities, from which we subtract 2*26^6 options, representing the forbidden all-lower-case and all-caps passwords, leaving 52^6-2*26^6 possible choices.

That's a good question.

One hundred dollars buys two or three hours of time from a professional tutor or teaching assistant.

Assuming no laboratory or administrative costs, how valuable is an education that you got for the cost of two or three hours of one-on-one attention (including teaching and evaulation) per year?

My favorite among these may be Calais, Maine. On a road trip a couple of decades ago, talking to a local at a tourist information booth:

"So, if we take Route 1 to Calais..."

"Ca-LAY? Where's...oh, you mean CALLOUS!"

"I suppose I do..."

Montpelier, Virginia gets a similar treatment.

I'm pretty sure that failure to properly signal turns and lane changes is actually illegal in more states than using a cell phone or texting while driving. So this must the be some newfangled we'll-fine-you-heavily-and-raise-your-insurance-rates kind of "nobody gives a shit".

Source?

In any case, the best possible world would be one where "most states are discouraging driving". Build liveable, walkable communities, with proper mixed-use development, green spaces, multi-use trails for pedestrians and bicycles, and good connections to public transit.

If the only way for a teen to buy groceries is by driving ten miles to a big-box Wal-Mart as the sole occupant of a seven-passenger SUV, then something is fundamentally broken.

Whereas it's easy to find a previous revision now, particularly if you didn't save the specific version that you're looking for under a separate filename? Come now. Search for changes by date and time. Search for changes that add or remove specific phrases. Display overall document length as a function of time. Zoomable, scrollable display of changes over time, with annotated marks at each 'save' point.

The twentieth century called; they want their storage technology back. Hard drives don't have to spin anymore. Portable devices are all operating off batteries (or backed up by batteries) anyway, so power outages aren't the bogeyman they once were. Worst case scenario a memory cache is flushed to disk every five or ten minutes and we're no worse off than the current 'autosave'.

True, but not really a problem. Use the 'save' button to insert an annotation in the editing history instead of creating or fixing a file.