Catch up on stories from the past week (and beyond) at the Slashdot story archive

 



Forgot your password?
typodupeerror
×

Comment Re:Kludgy Mess Requires Kludgier Foundation (Score 2) 45

Inflation was cooked up to explain most of that after the fact, though, so it's unsurprising that it does. The fundamental problem with inflation is that too much is tunable. Penrose's cyclic cosmology explains all the same stuff, and at least has the decency to make some bizarre (and very likely false) predictions outside of the early universe.

Theories of the very early universe that require new fields that there's a way to detect today are interesting. Certainly there are ideas to explain dark energy as an extension of inflation that fit that bill. But theories that propose a bunch of cool new physics that all conveniently vanished early on are a bit sketchy, at least until we can somehow make an equivalent of WMAP for the neutrino background radiation, and observe the very early universe directly. I hope I live to see that!

Comment Re:me dumb (Score 1) 157

If you can avoid traveling in normal space-time, then you've just potentially solved the problem entirely.

That doesn't help in the least. It doesn't matter how you travel: two events, separated in space, that happen "at the same time" in my frame of reference don't do so in another. If I depart A and arrive at B "instantly" in some reference frame, then I have travelled backwards in time from another. There's no getting around that: we live in a relativistic universe.

Comment The Revolving Door Argument is Thin Anyway.... (Score 5, Insightful) 86

The pool of people who are knowledgeable about the practices, challenges, and daily business realities of the telecommunications industry (or any industry for that matter) is a small one indeed; good luck finding someone in that pool with the experience necessary to lead an agency the size of the FCC who hasn't worked for the industry at one time in his or her life.

Comment Re: me dumb (Score 1) 157

You seem to think the QM guys cooked up this really weird story while particularly high one night, then went looking for a way to make it fit the universe. It's the observations themselves that bring the weirdness. Sure, the universe at these scales far from human experience doesn't fit with our intuitions, but that shouldn't surprise, as our intuitions are based entirely on human experience. Sure the math is intricate, far from simple or elegant, but there's no actual reason to believe the universe is simple and elegant, other than it would be nice if it were so.

Is this all some complex expression of some simpler, underlying truth that we just haven't found yet? Certainly everyone working in the field hopes so! But the horrible, crufty Standard Model just keeps making accurate predictions, and all the clever ideas of physicists to create a simpler underlying model that could explain everything we measure keep failing to do so.

Comment Re:me dumb (Score 1) 157

It seems like you're missing a key concept here: "simultaneous" depends on reference frame. If two events separated in space, A and B, happen at the same time in my reference frame, there's a reference frame in which A happens before B, and a reference frame in which B happens before A. There's no one true order of events.

This causes no paradoxes in relativity, precisely because you can't send information, or cause an action, faster than the speed of light. The propagation delay between A and B ensures cause precedes effect in every reference frame, and the order of events can't quite shift enough to overcome that propagation delay.

But moving FTL breaks all that. If I move "instantly" in my reference frame, then there's a frame in which I move back in time, and a frame in which I jump forward in time. I don't move back in time in my own reference frame, sure, but I really do in another. And if you're moving quickly relative to me, I can use that to relay a message from you to your past self - either by a series of accelerations between the frames, or by using a friend in your reference frame who can teleport as well.

If I want to visit my own past self, I would need to teleport some significant distance, accelerate up to relativistic speed, again teleport a significant distance, then accelerate again to match location and speed with my former self - elaborate, but possible. Or, if I could travel a great distance, say 1 billion light years, "instantly", then I don't need much acceleration at all, just the difference in velocity the Earth achieves in 6 months as it makes half an orbit would do it.

Comment Re: Do not (Score 5, Informative) 133

In addition to being cool stuff, mercury also has a very long history of use in gold extraction. I don't know about the people who built this particular structure; but mercury-amalgamation gold extraction is known to have been in use in South America well before the Spanish showed up. Given the human enthusiasm for gold, that's another point in mercury's favor as a funerary good, along with being weird and cool looking.

(Large scale extraction is now usually done by cyanide leaching, since that's somewhat less nasty than mercury amalgamation; but small scale miners often still use mercury. As one might imagine, the 'now heat the amalgam with a blowtorch to drive off the mercury and recover the gold' step is about as good for you as it sounds, possibly worse.)

Comment Re:Next up... (Score 4, Interesting) 128

That's a matter of perspective. I've been there numerous times and have found that the Canadian side has the best views but the American side is less of a tourist trap. The Canadians have done a piss poor job of keeping development in check, in fact, there's a school of thought saying that the Horseshoe Falls are perpetually mist covered (historically they weren't) because of changes in the local wind currents brought about by development on the Canadian side.

Besides, the coolest thing there is the Cave of the Winds, and that's in good ole USA. No trip would be complete without seeing both sides, but there are plenty of people (myself included, obviously) that think the American side is at least the equal of the Canadian side.

User Journal

Journal Journal: Sorry I haven't written...

I have two new stories nearly finished, but I've decided to see if I can sell first publication rights to a magazine. If everyone rejects them, I'll post them then. If one is accepted, it will likely be quite a while before I can post.

Comment Re:The study was flawed (Score 1) 104

It's easy for the general public to latch onto a particular cause. But once you learn more about beekeeping you realize how incredibly much out there is that can utterly f* up a hive. And which have in history regularly collapsed bee populations, far worse than the collapses we have today. Trachael mites once nearly obliterated beekeeping in Europe, saved mainly by the development of the Buckfast bee. Check out [wikipedia.org] this very inexhaustive list of bee pests and diseases. There's even some really counterintuitive effects in that small levels of some pesticides can actually increase hive survival rates, in that they're deadlier to bee pests like mites than to the bees themselves.

I completely agree with your point. One interesting point of speculation is that it's highly possible that Brother Adam (the developer of the Buckfast bee) was responsible for bringing Varroa to Europe. Brother Adam imported bees from around the world, and the first appearance of Varroa in the UK was not very far from where he operated.

Comment Re:A first step (Score 1) 299

Where we moved to in North Carolina, we're only served by two utilities: AT&T (for internet/phone/TV) and Duke Progressive (for electricity).

What about Timewarner?

We use electric heating--which is expensive, and while our neighborhood will be getting natural gas in the next few months, it makes no economic sense for us to replace our central heating system with gas. (The payoff exceeds the lifespan of the HVAC already installed.)

North Carolina generally has cheap electricity. If you have a heatpump, your electricity bill should not be that bad! Heatpumps generally work well in our climate.

I have to admit, the primary reason for not getting solar where we've lived in Los Angeles and now in Raleigh is that it didn't make a lot of economic sense. But as solar cell prices drop, having a battery-backed solar system on my house starts to sound more promising--especially after the last storm which knocked out our power for a couple of days.

I've run the numbers for the Triangle area after getting quotes through several local companies. Including both the federal and state tax credits and depreciation (this was for a commercial installation), break even is generally 7-8 years off. Probably worthwhile, but not a clear case. Add in a number 10 grand plus for batteries and the case is even more borderline. If you've got the cash, I agree it's great--would love to have power after a hurricane!

Since we are on a well and septic tank, if we can get most of our power from solar then we can pretty much be self-sufficient if there is a major disruption in the future--and that's worth a premium over what we now pay for electric service.

Isn't the price of electricity in NC literally 50% of what it is in California? We have cheap electricity.

Comment Re:Nice idea but... (Score 1) 299

I do understand the solar industry, that's why I fliped two big middle fingers to them and bought and imported all china solar panels and installed a 5Kwh setup for drastically cheaper than any of the overpriced US crap.

Like anyone else, I will buy the panels which provide the most output for my dollar, and which fit in the space available. But if the world would institute some laws which would penalize countries for slave labor and environmental abuse, then it would cease to make sense to buy a lot of that crap. I sit here surrounded by similar crap, but the point remains.

I use grid intertie and drive the meter backwards. No local storage.

That's certainly cost-effective, but it won't help as much in an outage.

Electrical bill is $14.95 a month because you have to pay the "fees" and the scumbag leaders in my states government passed a law that allows the power company to not pay for any surplus I generate above my own use.

Yes, scumbags are always the problem. Obviously it wouldn't make sense for you to add a lot of battery on the basis of selling power back at shifted times.

Comment Re: There ought to be a law (Score 1) 114

Just because you put words together, it doesn't mean the resulting sentence is true.

And you just made a meaningless statement which advances the conversation in no way whatsoever, since it could equally be applied to anything anyone said ever. If you want to provide some sort of meaningful information, you can do that. Or can you?

Slashdot Top Deals

No directory.

Working...