Oh look, I still can't play videos on my non-HAL Linux desktop. No matter, I originally got Prime for the free 2-day shipping, and for me I think it still makes economic sense to keep it. (Besides, their videos are too often low-quality. They won't even let you rent HD versions sometimes, if you're going to watch it on a PC. I have a fiber (albeit non-gigabit :( ) connection, darnit!)
The authors have a website - geometricalgebra.net - where you can download a program which will display all the diagrams from the book and allow you to manipulate them. You can also render arbitrary low-dimensional geometric algebra constructions which helps tremendously with improving your intuition about how things work. I'd say it's at a middle ground of mathematical sophistication - it's a good mix of proofs and practical usage. It's almost entirely dedicated to applying geometric algebra to computer graphics, so you won't get as much out of it if you're interested in applications to physics, or just pure mathematics.
If nothing else, I finally know what a quaternion really is after going through this book.
Ah, if they were writing about it 2 years ago already, then their result may be the one that was repeated in front of me - curse the mainstream media's "new! new!" language in their copy.
the abstract from that paper is very informative as to the context:
"It has been known for over a century that electrical signals are produced by material failure, for example during crack formation of crystals and glasses, or stick-slip motion of liquid mercury on glass. We describe here new experiments revealing that slip events in cohesive powders also produce electrical signals, and remarkably these signals can appear significantly in advance of slip events. We have confirmed this effect in two different experimental systems and using two common powdered materials, and in a third experiment we have demonstrated that similar voltage signals are produced by crack-like defects in several powdered materials."
The energy being released is from fracture, i.e. bonds breaking, in all but the granular case. Indeed, even granular pack breakup could well involve sympathetic local charging, especially for packs gradually compressed and stressed like soils.
I've yet to meet another noscript user who demands every site should provide roughly the same experience with or without scripts. Minimally we just want a webmaster to include a goddamn <noscript> telling us why we should temporarily whitelist her domain. And when something is pure text but requires JS to see any of it (as some blogspot templates tend to behave), we'll make complaints about progressive enhancement for that particular use case.
If you don't watch the video yourself, how can you trust a description to be accurate, and then form your own opinion on whether such acts (and undercover filming of such acts) should be illegal? I watched it, my own take is that it's nothing special in terms of disturbing material. The other video from PETA linked on this page shows more perverse acts but is also not very disturbing overall. The video on meat.org is probably the worst in this particular genre I've seen.
I guess I should have s/ a / any /. The description may have said "The video depicts a man repeatedly inserting a hot iron into the cow's vagina", which to me doesn't seem very vague, but isn't what happened in that video. "Fondling" is appropriate but as you say somewhat vague. So how are you supposed to know without watching the video?
I was fishing for a slightly better description, maybe half a sentence or so, and then I was going to trust it. The specific case isn't critical enough for me to feel the need to verify by watching an unpleasant video.
I was going to link that too if someone else didn't. But since the base rate is already about 150/100,000 per year, and 15% over a lifetime, and the survivability for prostate cancer is high, the increase isn't really that much and the benefits outweigh the risks for me.
My two favorites are Permutation City by Greg Egan and The Golden Age by John C. Wright (actually that one's a trilogy).
I hear good things about Iain M. Banks' Culture novels. I've only read one (The Player of Games) and while it was enjoyable it was still sort of meh, if that makes sense... (I've got Excession in my queue and I suspect I'll enjoy it more.)
While it's more in the realm of science-fantasy, you might enjoy this alternate universe imagining of the Harry Potter story: http://hpmor.com/