FTFY.

... Just like Mercury, Gemini, and Apollo.

Fusion consumes very little fuel, and therefore creates very little helium. If we converted the entire planet to 100% fusion energy it would still be several orders of magnitude short of our helium demand. https://www.reddit.com/r/asksc...

Shift-H is mapped by default in vimium. It's chorded, but at least it keeps you on the home row.

I come here to see the news picked apart in the discussions, not to get the latest breaking headlines. I therefore find either a paywalled link (so I can't RTFA), or a discussion about a previous paywalled link which doesn't match the article I'm reading.

However, thank you for taking the time to answer us. I'm more optimistic for Slashdot's future knowing that you've given thought to this and are making a reasoned decision.

I'm equally interested in blocking out what the blue team is saying. Truly, it's bipartisan: I'm tired of hearing about the guy regardless of who is speaking.

After trying several solutions I settled on Mairix. Searches are screaming fast (less than a second to search several hundred thousand emails), indexing is fast, it's reliable (no problems in the 5+ years I've been using it), and the search language is easy and flexible.

* I use procmail to send a copy of everything to an archive, rotated monthly
* The archive is therefore just a handful of mbox files
* I have a cron job to run "mairix -Q" every 5 minutes, and "mairix -p" nightly
* I have this in my .bashrc: "function search() { mairix -o $$ $* && mutt -f ~/Mail/$$ ; rm ~/Mail/$$ ; }"
* And here's my .mairixrc:

base=~/Mail
database=~/.mairixdb
mbox=archive-*
mformat=mbox
omit=spam

With the above, I can find:

* everything from slashdot in the last two months: search f:slashdot d:2m-
* any emails I sent containing "squishy" in the body: search f:subreality b:squishy
* messages with "password" or "passwd" or similar in the subject: search s:passw=
* get a quick summary of the search language: search -h

It's so good that I download all my email from my work Gmail account so I can search it... sometimes Google's search just isn't precise enough to find what I need.

Creating a widespread system of censorship is not the right approach:

1) It violates the principles the United States was founded on.
2) Suppressing the free flow of information deprives people of the liberty to make their own informed decisions.
3) When other opinions are squelched, the communication channel becomes a propaganda channel and loses all credibility.
4) This infrastructure will be abused. Now, ISIS. Next, common criminals. Eventually, dissidents.

Are you sure YOU know the difference between UTC and GMT?

It's not that UTC sounds cooler... It's what we actually use. UTC ticks based on atomic clocks and it's what's distributed through NTP. GMT (really UT) tracks Earth's rotation, doesn't have a stable second, and there are no high-precision realtime references.

time_t doesn't count the number of absolute SI seconds since the Epoch: it assumes days are always 86400.0 seconds long, and completely ignores leap seconds... even worse, before 1972 they used sub-second leaps, so the offset isn't even an integer.

So, all told, why not refer to it as UTC since that's actually correct?

The fact that you get /a/ face isn't profound, but the resulting image is interesting. It gives a good picture of the things that human vision uses to locate faces: obviously the eyes and mouth are most prominent; there's moderate contrast for the cheekbones and nose; the oval shape is only vague; the neck, ears, eyebrows, and hairline are almost entirely missing.

I expect those are already well known to vision specialists, but to me, it's an interesting analysis of the exact details which make an inanimate object become a face.

Yes, we should do exactly that: encourage people to send a quick "I'm OK" text or 30-second call, then get off the air so everyone else check in. If you want to yak, just wait an hour until the surge is over.

It's reasonably close. If you check the datasheets for "Static Characteristics" / "DC Characteristics" you'll find:

The LPC1114FN28 (the ARM chip) draws 9ma @50 MHz, 6ua @deep-sleep, and 220na @power-down;
The ATMEGA168PA (typical Arduino-ish AVR) draws 4.2ma @8MHz, 0.8ua @power-save, and 0.1ua @power-down.

These numbers are just for the chips - the Arduino draws considerably more (about 40ma @idle), and you can stretch your batteries a lot by hacking it. To give a sense of scale, the power LED on an Arduino probably draws 5-10 ma just by itself.

Note that this is a "Cortex M0" profile ARM chip - M means Microcontroller, and 0 means low-end. This is a 50 MHz chip with 32K of flash and 4K of RAM. It's more powerful than an AVR, but don't expect to boot Linux on your breadboard with this thing... that's a job for the Cortex A (Application) series.

Source:
http://www.nxp.com/documents/d...
http://www.atmel.com/images/At...

No, these are water rockets. The reaction mass is water. :)

Even if the gas was reaction mass you'd probably want a light gas. A heavy gas might have better impulse per mole or per liter, but lighter gasses will provide more impulse per gram. At some point the larger pressure vessel will add more mass than you're saving on the gas, but I'd expect the optimal gas to be closer to the hydrogen end of the spectrum. Take that with a grain of salt though because I haven't made any attempt at the math.

1) Lower mass. Air at STP is 1.2 g/L. Hydrogen is 0.09 g/L. Looking at the contest rules the pressure vessel has to contain 20% water, so most of the volume is gas. A lighter gas lets you either use more pressure while staying under the 1500 gram limit, or have less dead weight for a given bottle/propellant quantity (whichever way you want to look at it).

2) Non-ideal gasses have different compressability. Not my field, so I can't calculate it, but it's significant enough that the rules forbid it for this reason. You have to use air.

"Very rarely, tubes grow back together again and pregnancy may occur. This happens in about 1 out of 1,000 cases."

Of course, that's probably a much lower failure rate than the injections discussed in TFA.