2370 posts • joined 10 Jun 2009
Light isn't really so fast. Old electronic engineering approximation is a foot per nanosecond (or 30cm). So for a 100GHz clock, that's 0.3mm per clock.
In practice with things like this you don't normally measure the exact arrival time of a pulse, you measure the phase of a modulation of a carrier wave. As someone noted above, this scheme has a lot in common with GPS and might be a very interesting way to observe and test general relativity.
BTW is Mars the best place for such an experiment? I would have thought that the (cold) dark side of Mercury might be more useful, because it's deeper in the Sun's gravity well and moving a lot faster. Maybe Mercury next?
The other missing precaution
The other basic safety precaution that must have been lacking, was a mains supply wired though an RCCB!
Suggestion to the UK gomernment: that they scrap all the absurd PAT testing regulations for anything other than appliances that are ported on a frequent basis (vacuum cleaners etc). IF (and only if) all mains outlets in the area are wired through RCCBs. Or even make them compulsory, in exchange for scrapping the vastly more wasteful business of PAT testing every PC, printer, wall-wart PSU, charger, mains cable ....
Re: "most of the places it's "selling" to are "downgrading" as soon as they unpack the hardware"
I'm sure someone in Microsoft has Windows activation statistics. Although it does appear as if the top-level management is refusing to look at them.
In days of yore, the couriers drew straws to decide who would bring the latest bad news to the attention of the tyrant. It was a dangerous job. In those days the messenger might well be literally shot or otherwise executed. The worst that can happen these days is rather less, but losing your job for being accurate about the Emperor's new clothes is still a possibility under the worst sort of management. Safer to stay quiet until asked?
(Lu-Tze quote about leaders, which applies equally to managers. "The second-best leader is respected, and the third-best is feared. The worst is hated. When the best leader's job is done, the people say 'we did it ourselves' " ).
Re: Microsoft FAIL
There's a good chance that if YOU wrote it, you can run it under WINE on Linux. WINE has improved of late. Certainly worth a test. The problems seem to arise with things written by MS, or by big software houses with privileged access to interfaces that MS doesn't publish.
The question should be "how is content going to be created ...."
That's things as humble as pages of text, web pages, spreadsheets, entering the data to a 'base.. You don't do any of those things well with a tablet. If your employer insists, you'll soon be visiting your doctor with RSI and hiring a lawyer.
Putting an interface optimised for tablets (I'm being charitable) on desktop computers cannot but reduce productivity. Then there's the retraining costs. Why are they surprised it's not selling well, and that most of the places it's "selling" to are "downgrading" as soon as they unpack the hardware?
Re: ...or anything resembling an argument.
And the thing to add to that, is that as a person experienced in using both Windows XP/7 and Linux, I can move quite easily and not unhappily to an Apple iMac. It's about as easy as moving from one conventionally operated car to another. A bit of initial irritation with the minor controls, but nothing completely infuriating and no need for a formal re-education.
Re: But HOW to kill Steve Ballmer?
That's the board's job. Or the shareholders'. I doubt they'll do the deed until it's too late to make any difference. They're all PHBs like him (apart from the PH, anyway). I'd guess about a year after they've ceased supporting Windows 7, i.e. two years too late.
IBM, if you still want revenge for OS/2, your time to move is fast approaching.
Re: New lipstick
Or "the names and the faces change, but the assholes stay the same".
Re: Chromebooks sneak past MS police
If it was Win 8, I'd agree. The right Linux distro and UI is quite sprightly on a truly ancient PC, so I'd expect it to run happily on a Chromebook. ISTRR Linus uses a Linux'ed Chromebook!
Re: UseFUL cheap NOT junk
Netbooks also weren't helped by the fact that we had to stick with the same 1024x600 resolution and 1GB RAM spec for years.
That's part of how Microsoft killed them. It had to have that spec, or Microsoft wouldn't allow it to be sold with Windows XP (after XP stopped being generally available). I think SSDs were also banned by MS.
Windows 7 was too much of a resource hog to run on less than 4Gb, and Atom CPUs were architecturally limited to 2Gb. So there was a period during which a Windows 7 Netbook was impossible - low-power i3 CPUs were too expensive. By the time the tech advanced at the low end (courtesy of AMD), Windows 8 was about to become the only retail chioce.
I once (for fun) installed Win 7 on an Eee PC upgraded to 2Gb RAM and an SSD. It was usable, if a bit "sticky". Biggest problem was that the Win 7 UI really wants 1366x768 minimum.
UseFUL cheap NOT junk
Netbooks sold like hot cakes before Microsoft found ways to kill the format, because they were cheap enough and light enough to cart around without worrying yourself about theft or damage, and good enough to do most of what you wanted to do on the move.
Microsoft killed the Netbook but the market niche never went away. Now the Chromebook is filling the niche. Quelle surprise. Another Microsoft own goal.
BTW you can get cheap Android tablets for the same price and some of them are doubtless occupying the same niche. But for many purposes, you really do want a keyboard!
Flea-brained gadget? Pea-brained gadget? Any connection?
So is it not actually true that the plague bacillus can survive many centuries to infect someone who digs up a plague-pit? (Bubonic / Pneumonic Plague is a bacillus, not a virus, though some of the plagues might not really have been Plague. The symptoms also match a killer flu like the 1919 one, so far as one can tell from such contemporary medical description as has survived).
I had read that plague graves were best undisturbed for milennia. That should someone accidentally dig one up, they should immediately re-bury it, cease work, keep a VERY close watch on their health for the next couple of weeks, and change the building plans.
Re: English acronyms ... only 26 letters
After you've exhausted the TLAs move on to the ETLAs and the GBFLAs.
Re: Office 2000
Your best upgrade is LibreOffice, before anyone retrains themselves to use ribbons and tiles and all the other crap that Microsoft has stuffed into the releases after 2003.
Re: Can you say LibreOffice?
Openoffice / Libreoffice? It's less of a fork than Office 2003 to Office 2007 was / is.
Anyway, now Oracle have got out of the way, there's a chance that the fork will be re-joined over the next year or two.
When there's 3 GPS systems: believe the two that agree?
Non-nuclear missiles, surely?
I would have thought that civilian-grade accuracy was plenty with respect to dropping a nuke near enough to its target. Military precision GPS has more to do with flying a conventional or cruise missile through a single specified door or window!
Someone saw a way to get all their ancient PCs replaced with brand new ones.
Re: Hmmm, gravity...
My guess: a spherically symmetrical collapse wouldn't.
Two neutron stars or black holes orbiting each other will eventually merge. They lose energy by gravitational radiation ( and probably by drag induced by infalling gas, etc.), and get closer, which increases the radiation, until there should be a realy intense pulse just as the two stars or holes merge. Bigger, I think, than any single-body collapse could accomplish. (Caveat: "obvious" answers in GR, often aren't)
Re: Magnetic field
A magnetar's 10^10 tesla field, by contrast, has an energy density of 4.0×10^25 J/m3, with an E/c2 mass density >10^4 times that of lead.
remarkable things happen within a magnetic field of magnetar strength. "X-ray photons readily split in two or merge together. The vacuum itself is polarized, becoming strongly birefringent, like a calcite crystal. Atoms are deformed into long cylinders thinner than the quantum-relativistic de Broglie wavelength of an electron." ... At 10^10 teslas, a hydrogen atom becomes a spindle 200 times narrower than its normal diameter.
The magnetic field of a magnetar would be lethal even at a distance of 1000 km due to the strong magnetic field distorting the electron clouds of the subject's constituent atoms, rendering the chemistry of life impossible
Does anyone know what is the maximum magnetic field strength that could exist in even wierder circumstances? Is it where the engergy density of the field would cause collapse of space-time into a black hole, or is there some other limitation?
Re: Magnetic field
so Maxwell's equations have the full symmetry that would result from it:
Feel free to write the equations with full symmetry. Then there's a supplementary equation that you use to generate the more useful but less symmetric forms, because as far as we know magnetic monopoles do not exist.
There's actually a proof that in a universe with spherical topology, at least two magnetic monopoles must exist. It's the same as the one that says you can't get all the hairs on a (perfect, seamless) tennis ball to lie parallel to the surface at once. So either the universe has a toroidal or more complex topology, or magnetic monopoles do exist somewhere out there. (Possibly, outside the observable universe, at which point things start to get a bit philosophical. )
I read a paper about giant waves once. (I found that the maths was nearly as heavy as the seas it described). Basically, once sea waves get very large, they cease to behave in line with simple theory, and start to attract each other. This means that the distribution of size of ocean waves has a long (and very dangerous) tail. Where the ocean is shallower than a good few times the height of the wave, things get even worse.
"Freak wave" seems a reasonable term for something that a mariner will see no more than once or twice in a lifetime of seafaring.
Re: Use case
400Hz is also MIL spec. It's used on ships and planes because 400Hz motors can be smaller and lighter. It's not used on utility grids becaujse long-distance transmission losses are prohibitively high. 400Hz pre-switched-mode power supplies were also lighter, and needed less huge electrolytic capacitors.
Did CDC sell a lot of kit to the US Military? I'm guessing that they did.
Re: Another one to add to the list.
@AC 6th July 09:39 think about the then-acceptable fuel (in)efficiency of a 1968 gas-guzzler, and consider that one can greatly increase the range of any electric car by adding more batteries. However, that's at the expense of performance (more weight) and efficiency (more energy wasted speeding up and slowing down the extra battery mass).
I suspect that the top speed of 50mph had quite a bit to do with the weight of the batteries needed to get that range. A lot of progress HAS since been made. Today an electric car can be competitive on most fronts except range and capital cost, and perhaps the biggest thing holding e-cars back is the lack of a standardised national recharging infrastructure.
Ancestry of English
Didn't English evolve from a Germanic language anyway? So this is just it coming full circle :-)
In general, no. English is actually a relatively recent new language (compared to Greek, German or French).
It was formed by the amalgamation of the Germanic language spoken by the English Saxons, with the Norman-French spoken by the 1066 invaders. As the communities merged, a creole (technical linguistic term) developed. To see what was happening, get a copy of Chaucer's "Canterbury Tales" that has the original on one side of the fold and a modern English translation on the other. Chaucer was near the start of the process. The Saxon proto-English used by the peasants, and the French proto-English used by the nobles, are still quite different, but coming together (his pilgrims understood each other without translators). It's a good read, by the way. Then watch a play by Shakespeare (who perfected the unified English Language, or maybe even invented it). You shouldn't need any translation.
The process slowed down after Shakespeare, but hasn't stopped. In particular, the grammars of Norman French and Saxon were incompatible, and English has been and is progressively jettisoning its grammar. It is quite possible English will evolve into a pure placement-positional language over the next few centuries (more like Chinese in structure, than anything else of Indo-European origins). The collision between two languages may also be the reason why English has voraciously assimilated words it needed to plug gaps real or imagined in its own vocabulary, from any source, or by neologistic invention. (Is neologistic a word? Do I care? )
Back to "shitstorm", it's no surprise at all that both parts of the word are of Germanic origin. English has preserved a distinction between "polite" words of French (noble) origins, and "rude" ones of Saxon (peasant) origins, which are synonyms or almost so. (e.g. "tempest" vs "storm", "execrement" vs "shit"). Many languages (including, I'm told, Gaelic and Arabic) don't have any rude words, and one has to employ florid combinations if one wishes to offend. "May the fleas of a thousand camels infest your armpits" and suchlike.
so a Scheisssturm would mean "a really good storm", the opposite of the intention.
I don't know about "opposite". A really good Storm of Shit ... for the observers. Somewhat different for the participants. There's a word for that ... oh yes, Schadenfreude.
Re: Ich bin eine Shitstorm!
Where do German verbs go? It depends whether you're trying to be formal / pompous / incomprehensible or not! Informally, after the subject and before he object, like English. Formally (and almost always so in writing) at the end of the sentence. You can skip ahead with your eyes, but not with your ears.
Re: @ murph -
I too was wondering how a combination of two English words both obviously of common origin to the German, could be called an Anglicism? I'd have expected it to be almost immediately back-translated into German. Or would a native German speaker find that "Shitstorm" trips off the tongue more easily than "Scheissturm"?
Re: Now if you could build a solid stage magnetic disk system.
I think magnetic storage will hold on at the large data end. When one combines bit-patterned media and heat-assisted recording (BPM and HAMR) one can anticipate drive capacites measured in tens of Terabytes. This is technology that's already working in the lab. I should think that the question at present, is whether anyone will ever want single drives that size? Having Terabyte flash caches up front may well drive demand.
Re: Stacking dies isn't a silver bullet
I don't think power consumption is too much of a problem for the forseeable future. An SSD uses something like one watt spread out over maybe 40 square centimeters. (And note, some of that is the controller not the flash chips). A CPU or other highly active logic chip uses maybe 100 watts originating in maybe one square centimeter, but spread out over a heatsink footprint of maybe the same 40 square centimeters. So provided there's good thermal connectivity between stacked chips, one could stack a hundred of them (with a decent heatsink on top) without exceeding the thermal loadings that are commonplace in desktop PC CPUs and high-end graphics cards. (I doubt we'll be seeing 100-deep stacks any time soon, but thermal loading isn't the reason).
Price/Gbyte? Well, it'll be interesting to see just how far and how fast economies of (vast!) scale can drive down the price of manufacturing flash chips.
Presumably Apple buy LEDs from companies in (say) China that aren't paying royalties. If they were buying royalty-paid proucts from (say) Cree, there would be no case.
I'd like to know whether Apple got a cease-and-desist letter some years ago, or not.
But even if not, they're using a patented technology on which royalties have not been paid. I think the way the law works, the aggrieved party sues Apple and Apple can sue their supplier in turn. (Except, the supplier is in China? Well, that's the choice they made).
Do patents apply to personal use?
In the UK, that's a definite no. One of the purposes of the patent system is to place inventions in the public domain, so that everyone else may attempt to create further advances on the technologies so disclosed. To profit thereby you'll have to license the original patent, or await its expiry. Infringement is manufacturing or using a patented device or technology for profit.
In the days before patents existed, inventors kept the methods by which they manufactured things secret, and the method of manufacture often died with its inventor. This was not in the public good.
Not all patents are bad. It's the stretching of patent law into areas for which it was never intended that's bad, along with USA-style law and lawyers. Software should be covered by copyright, not by patent. The imitation of business methiods should be permitted - first-mover advantage should be sufficient reward. And so on.
It's certainly not trolling, if it's a genuine patent on a genuine invention. If Philips, Cree etc. are paying royalties on the patents, that suggests to me that this is the case. (In the case of Cree, that's a royalty on a large percentage of everything they make). These are large companies that are perfectly capable of out-lawyering a university if they feel they have a case (and probably even if they didn't, but I'll assume that they are honorable and/or care about the PR).
Re: They even decorate it at christmas...
And at Halloween? Obvious, but a big yellow cat's eye would be good all the same.
giving the thousands who pass by on the M1 motorway something to ponder: “What the bloody heck is that for?”
I was one of them. Thanks!
Re: And yet
CAD pads? I can't swear to how common, but I saw one being used for CAD a couple of days ago. Wacom still has a business making them.
Re: And yet
The track-ball was probably better, at least until the modern optical mouse (no moving parts) arrived. You can still buy them. They cost a bit more.
For driving a CAD or artistic-design system, track-pads(*) with pens or wands remain commonly in use. Absolute rather than relative position control. Again, better, but definitely a lot more expensive.
The mouse is definitely the best idea if cost is factored in.
(*) not to be confused with the finger-sensing track-pad on a laptop.
I think it probably is a coincidence. I was using computers with mice well before 1987. Back then, the mouse was an inferior but cheaper interface compared to a track-ball. A 2-axis joystick was also sometimes used. Given that the computer cost a 4- or 5-figure sum, the added cost of a track-ball wasn't a particularly noticeable extra and neither would the royalties on a mouse have been. Mice took off when computers got cheap enough that the cost of the interface device became a significant part of the system price.
Mouse evolution: each was perceived as a huge leap forward in quality.
Mk. 1 two wheels scraping on desk. Diagonal motion had a very nonlinear relation to vertical or horizontal motion!
Mk. 2A one ball scraping on desk, driving two wheels inside the mouse. Contact rotation sensing. These mice degraded quite rapidly as the contacts wore out or got dirty.
Mk. 2B as Mk. 2A, but with optical rotation sensing.
Mk. 3, optical mouse with no moving parts, as is universal(?) today. Early versions required the use of a mouse-mat with a particular pattern printed on it. Losing the mat was like losing the mouse!
Youngsters have probably never experienced the joys of trying to get the accumulated fluff and sticky muck off the rollers and wheels in a physical-contact mouse.
Re: "It's a Sony"
I also have another reason for not buying Sony. It's the heap of unrepairable broken-down Sony laptops that was in my office until they recently got carted away as scrap. There's no corresponding heap of broken-down Toshibas or IBMs. Of late, I've been replacing lots of Sony-branded CDRW and DVDRW drives in desktop systems. Not just a single "lemon" model, either. Samsung drives of similar vintages are soldiering on.
Re: "It's a Sony"
Let's not forget the whole 'Pearl Harbour' thing on our trip down Memory Lane...
That's a very silly straw man. If I were convinced that nobody still worked at Sony who bore responsiblity for the betrayals of trust Sony inflicted on us, I'd start considering the purchase of their products again. They might have sacked everyone responsible, all the way up to the board. Most employers call deliberate criminality "gross misconduct". Sony didn't.
It's a personal choice. I'm denying them my money in revenge for the chunk of my life that their rootkit activities wasted (by making my work environment generally less pleasant). I'm glad to see, so are quite a few others.
Re: Does it really cost that much to bear foreign data?
1p for the data and £10 for the bean-counting?
Show them you mean it
A suggestion for Angela Merkel. Give Snowdon asylum in Germany. Quote the national-interest exception to any extradition treaties if the USA asks for him. That's how to find out every last detail, and also how to send a very strong signal that we really really are not amused.
Of course, it won't happen.
Re: So much for respecting the religious beliefs of other people.
@AC 15:27. It's not a common philosophy, but one can believe that nothing really exists except one's own thoughts. "Am I a man dreaming I am a butterfly, or a butterfly dreaming it is a man". If you work in IT and are familiar with the concept of virtuality, it's actually a less strange idea than it might be otherwise. How can you prove that you and I are not simulations of human brains, in a historical simulation being run by the beings that supplanted humanity during the technological singularity that has already happened out there in the real solar system.
Occam's razor comes in handy with thoughts like this, but that's an axiom not a proof.
Re: ::pops some corn & grabs a beer::
What is the difference in belief in God and belief in No_God? Answer: two letters and an underscore.
The problem is belief, without evidence. In a universe containing very good evidence for its own creation, is it really wise to deny all possibility of a creator just like that? As soon as you start thinking that's OK, you are on as much slippery path to logical inconsistency and moral ruin, as those who assert that the creation was 6000-odd years ago because this book says so.
I'm a militant agnostic, otherwise known as a scientist. Yes, I do have to start with a few axioms (which I'll drop if anyone ever finds a way to disprove them). One is that there exists an objective universe outside my head. Another is that Occam's razor is a really good idea.
Re: So much for respecting the religious beliefs of other people.
wonder if we can set up a country with entry requirements based on a support for the scientific method - a citizen is free to worship any god or gods they please, so long as they can first devise a proper peer-reviewed experiment proving that said god(s) actually exist.
I believe in the universe, but I'm b*****ed if I can think of an experiment that proves it exists. What would the control be? I'm not even sure that I can prove that I exist.
Re: Square bullets
Early artillery shells had several brass lugs sticking out of their sides, to engage with the rifling of the gun. Doesn't sound like it should work, does it? On top of which, we're talking muzzle-loaded cannons.
I love the way sone of these threads drift.
Re: So much for respecting the religious beliefs of other people.
didnt Buddhism produce some of the finest warriors of their time (the Japanese samurai)?
Samurai beliefs had wandered a long way from the source. If they were still Buddhist at all, they were a sect on the fringes. And on the fringes of the fringe, the Japanese suicide-asassin sect, the name of which I've forgotten. Devote your life to learning to kill, kill the man your Abbot ordered you to kill, then kill yourself to attain Nirvana if you survive your mission. Truly bizarre.
Buddhism begat many of the martial arts. The forms of unarmed combat that specialize in redirecting an opponent's attack against himself are probably truest to their source. It is not necessary to become a punchbag to believe in non-violence.
Re: So much for respecting the religious beliefs of other people.
I think Buddhists deserve an honorable mention. No large group of people is perfect, but I'd say that they're no less respecting of the beliefs of others, than Atheists are.
@Paul Shirley - desktop in terminal decline?!
What's happening is that the desktop market is both saturated (in the West) and mature. People who need desktops (for business and for serious hobbies) have them already. Why buy a new one? 1. Because the old one has broken down. 2. Is there a two? Windows 8 is a new reason NOT to buy a new one if the old one still works. Ignoring that, desktop sales will go from one every 3-5 years to one every 6-10 years: down to 40% of the boom-time sales, then flat for the forseeable future. That's still a huge market.
The winners from Microsoft's incompetence will be Apple and (maybe) Linux. Also I can't see Windows 8 making much of a dent in iPad and Android tablet sales.
The tablet market will soon enough be mature and saturated. I suspect Tablets aren't replacing desktops, except for home data consumers who only ever had a desktop because it was all they could get at the time. Tablets are mostly supplementing desktops.
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