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* Posts by Michael H.F. Wilkinson

2553 posts • joined 24 Apr 2007

Pen+tablet bandwagon finally rolling, Nvidia leaps aboard

Michael H.F. Wilkinson
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Deja vu all over again

Where's that Palm Tungsten T3

Different technology, maybe, but I loved using the stylus on that. My youngest son now thinks it is a cool toy (mainly for recording funny voices).

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Germans purge selves of indigestible 63-letter word

Michael H.F. Wilkinson
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The Dutch have their own way of creating massive words:

Hottentottensoldatententententoonstellingspersonenautoparkeerterrein

is one construct, but their tendency to create words with an uncomfortable number of consecutive consonants really stands out:

angstschreeuw

with 8 was long held to be the champion, but

slechtstschrijvend

might top that with 9 (jury still out on whether this word is OK. Trust the Welsh to come up with place names that (appear) to consist only of consonants:

Cwmtwrch, Bwlch and Mwnt were all places I have passed on my meanderings in Wales.

In these cases the 'w' is pronounced more or less like an "oo" as in food

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Hitchhikers' Guide was WRONG, Earth is not in a galactic backwater

Michael H.F. Wilkinson
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Joke

We will remain a backwater

as long as cricket is being played on earth. I thought everybody knew that

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LOHAN team regroups for second pop at SPEARS

Michael H.F. Wilkinson
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Happy

HERETIC!!!!!!!

sorry, couldn't resist.

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Intel's plan for Haswell, Silvermont, Bay Trail: WORLD DOMINATION

Michael H.F. Wilkinson
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Coat

Everything?

Are they forgetting life and the universe?

Mine is the one with the cassette tapes of the radio plays in the pocket

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Quantum boffins send data ACROSS TIME AND SPACE

Michael H.F. Wilkinson
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Joke

Re: Did anyone else notice?

Mr Eisenberg, are you certain you want to name your son Hagai? You realize you are dooming him to a career of quantum physics?

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New EXPLICIT pics support notion of moist, welcoming past for Mars

Michael H.F. Wilkinson
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Re: you guys are just arguing...

A real scientist will go on arguing until he or she is satisfied by the proofs/arguments given (and even then could start arguing again as new data become available).

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Michael H.F. Wilkinson
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Joke

Dead right. Imagine the excitement if the fluid turned out to be alcohol (how easy would it be to get volunteers for a trip to Mars then?).

Alternatively, it was octane, and some Martian equivalent of the Humvee became so popular that they used every last drop (hence the carbon-dioxide atmosphere).

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Sacred islet Rockall repels Brit adventurer's first assault

Michael H.F. Wilkinson
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Happy

@Parax Re: they are doing it all wrong!

There's a Dutch saying which translates to:

The best sailors are always on shore

I think this is most appropriate.

I am also reminded of Harry Enfield's perennial

You don't wanna do it like that!

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Google nuke thyself: Mountain View's H.264 righteous flame-out

Michael H.F. Wilkinson
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Re: Codec patents

The difference is actually made in patent law in most countries.

Most patent laws explicitly exclude patenting mathematical equations (though not necessarily their application). Because any algorithm can be expressed in lambda calculus, it could be (and has been) argued that algorithms should not be patentable. Their application (as e.g. as codec) could be under various laws.

So, as Mr. Slant would say: "This is an interesting case."

With degree of interest being defined as proportional to the amount of money it brings to lawyers.

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Fedora's Schrödinger's Cat Linux gives coders claws for thought

Michael H.F. Wilkinson
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I had a version of this, but it quantum-tunnelled away

Sorry, couldn't resist.

Mine is the one with "What is Life?" by Erwin Schrödinger in the pocket (very much worth the read!)

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BOFH: Go on, beancounter, type DROP TABLE asset;

Michael H.F. Wilkinson
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Thumb Up

Nice!!

The beancounter should have heeded the warning sign:

Danger! Dropping tables! Hard-hat and further protective clothing required.

or the more generic:

Here be dragons

when approaching the BOFH's den

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Curse you, old person, for inventing computers!

Michael H.F. Wilkinson
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Joke

Old git 1: When I was a lad, we never had these newfangled integrated bleeding development environments!

Old git 2: Aye, we had emacs, and we were glad of it!

Old git 3: Emacs! we would have loved to have had emacs, we were stuck with vi, but we were happy!

Old git 4: We did not have editors at all, we had piles of punched cards! Hundreds of lines of FORTAN, one to

each card

Old git 1: Luxury! We had no programming languages at all! Everything was machine language

Old git 2: Machine language!? We would have died for machine language. We had to hand wire connections

in our computer to program it!

Old git 3: Right!

When I was young we had to compute entire navigation table with nought more than pencil and

paper and a hand-cranked mechanical computing apparatus!

Old git 4: And the problem with kids today is that if you tell them they don't believe a word you are saying!

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The BOFH is BACK: And it's cloudy with a 90% chance of beatings

Michael H.F. Wilkinson
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Thumb Up

Nice

very nice indeed

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Michael H.F. Wilkinson
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Pint

Re: If only..

Stewing the results in beer is recommended

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Smartwatch face off: Pebble, MetaWatch and new hi-tech timepieces

Michael H.F. Wilkinson
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They seem to be getting better very slowly. I have yet to see a real killer app for these, but maybe one will come along.

I will just stick with my current watch. I only ever buy a watch when the previous one breaks in such a way that repair is no longer economical. Given that my current (only my third) watch is a year old, and on average, my watches last about 19 years (OK, N=2 statistics), there could be some really enticing options available when I am up for my fourth watch.

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WW II U-boat attacks prompt new US response

Michael H.F. Wilkinson
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Re: Blame BP

They might be able to claim "Force majeure"

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Michael H.F. Wilkinson
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Coat

Re: Kaaaarrrlllll!!

Shouldn't that be:

AALLLLAAAAAARRRRMMMM!!!!

Tauchen!!!!!

Mine is the one with the "Das Boot" director's cut DVD in the pocket

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Soylent Corporation prepares to DEFEAT FOOD

Michael H.F. Wilkinson
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Pint

Thanks, but no thanks

Tonight I think I might be serving some portions of monkfish fillet, lightly drizzled in olive oil and some lemon juice, sprinkled with pepper and some fresh sage from the garden, wrapped in lean smoky bacon, baked in the oven at 220 C for just 15 minutes served with pasta and pesto alla genovese, and spinach.

Alternatively, I might just have some pizza. Some beer or wine would go down a treat as well

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HTC woes prompts 'leave now' tweet from former staffer

Michael H.F. Wilkinson
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Pity really, I liked my HTC Desire a lot. I now have a Desire X (in part because the interface was familiar, in part because I got a good deal), but when that needs replacement I may well have to look elsewhere, unless by then telcos are dumping their HTC phones as they too bail out (something tells me living in the Netherlands has influenced me ;-) ).

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Computer use irrelevant to education outcomes, says US study

Michael H.F. Wilkinson
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Re: The key to teaching is the teacher

One thing that the government here in the Netherlands might try (maybe the same elsewhere), is to let teachers teach, not administrate. I gave a few lessons of computer science at schools nearby, to show kids that CS is certainly not learning to work in MS-Office. I was appalled at how much time teachers have to waste on administration during each lesson. And then there are the endless assessments and test that are foisted upon school children here from the age of 4 upwards. Endless assessments to measure outcomes. As one teacher pointedly stated: "A pig doesn't get fatter by weighing it more often". This tendency to measure everything to death has even reached preschool creches we have. I have heard people agonize about the fact that a 3 or 4 year old kid only recognized 4 letters whereas they should know 5 at that age. As if that difference is at all meaningful!.

When teachers are assessed by the teaching outcomes of their pupils, they will train them to perform well at the test, which is not the same as giving them understanding of the subject matter (let alone stimulating them).

</rant>

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Curiosity plunges its drill into Mars AGAIN, seeks life-giving sample

Michael H.F. Wilkinson
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Re: Cumberland

Or contains sauce

Darn, I'm hungry now

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New 4TB drive spaffs half a telly season into your eyes AT ONCE

Michael H.F. Wilkinson
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16 channels simultaneously?

Just don't cross-connect it to an electric monk, it will try to believe all 16 channels simultaneously.

Mine is the one with "Dirk Gently's Holistic Detective Agency" in the pocket

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German robots sent to Oz to make GPS millimetre-perfect

Michael H.F. Wilkinson
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Coat

Unprecedented precision!

So now, drivers can mess things up with sub-millimetre precision!

OK, stop this sketch it's getting silly

Mine is the one with a map in the pocket

(and yes, sub-millimetre precision is impressive!)

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The iWatch is coming! The iWatch is coming!

Michael H.F. Wilkinson
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Joke

Never? You mean only when they wrench it out of your cold dead hands. In which case you will be passed caring.

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Michael H.F. Wilkinson
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Joke

Why not a BOFH watch?

which runs linux, allows you to log into your servers. A full keyboard would perhaps be a bit much, bt a small set of function keys with the following functions could be enough:

F1: rm -rf *

F2: kill -9

F3: shutdown -h now

F4: reboot

like this one

Suggestions for other keys welcome

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MYSTERY Nokia Lumia with gazillion-pixel camera 'spotted'

Michael H.F. Wilkinson
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Boffin

Let's talk photon counts and well sizes

Cramming 41Mpixel into such a small format is apparently possible, but only by making the photosites tiny. This means the electron well can only hold comparatively few electrons before saturating. This in turn means that the number of photons detected before saturation is low, which means increased noise and lower dynamic range. By binning multiple photosites together into a much smaller number of pixels, you can counteract this, and no doubt produce some very nifty 8MP images (especially with good processing techniques).

However, this will never match the quality of a DLSR, simply because the much bigger lens of a DLSR gathers more photons, which means better signal to noise. The reason is that quantum efficiencies (percentage of photons detected) of photosites are very high indeed (40% and above) so little can be gained there (and every gain at the phone end can be made equally at the DSLR end). A DSLR lens easily has 4x the diameter of that of a camera phone, meaning it gets 16x the number of photons. A phone sensor would need to collect 800% of all photons (which is clearly impossible) to match a DSLR sensor with 50% quantum efficiency.

So, will these cameras produce nice images, good enough for most purposes? Even when deducting marketing speak: yes. Will they match professional DSLR kit: No; this little thing called physics gets in the way. On the other hand, do I carry a phone with me all day? Certainly. Do I carry several kilogrammes of DSLR kit around all the time? No way!

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Crack Army pilot to be first PROPER British astronaut IN SPAAAACE

Michael H.F. Wilkinson
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Pint

I do not care whether he is first or second: there is going to be (another) British astronaut. Cheers to him

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Nine-year-old Opportunity Mars rover sets NASA distance record

Michael H.F. Wilkinson
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Re: So...

Put like that, maybe NASA could get sponsoring from Ferrari to up the ante on that front

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Acorn founder: SIXTH WAVE of tech will wash away Apple, Intel

Michael H.F. Wilkinson
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Re: Oh S*&t!

Share and enjoy!!

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Michael H.F. Wilkinson
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Alien

Re: Oh S*&t!

More correctly:

"We'll tell you:' Go stick your head in a pig'"

As sung by a choir of robots with their voice boxes exactly one flattened fifth out of tune.

And remember:

Don't Panic!

No large, friendly letters available I am afraid

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Larry Page acknowledges creeping vocal paralysis

Michael H.F. Wilkinson
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Re: That sux

It might have been a scary (or more accurately, very, very sad) person who is responsible for the down vote, or alternatively, it might have been a very clumsy person.

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Bing uncloaks Klingon translator

Michael H.F. Wilkinson
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Coat

What next?

Sindarin? Quenya?

Brindisian? Klatchian?

Mine is the one with Jingo! in the pocket

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Drone to deliver beer-as-a-service

Michael H.F. Wilkinson
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Black Helicopters

I am torn

between a beer icon and a helicopter icon.

OK, let's go for the tinfoil-hat brigade:

The government laces drone-supplied beer with truth serum so they can spy on you

In truth of course, beer in sufficient quantities can always let you divulge inconvenient truths

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Astronaut Chris Hadfield's Space Oddity ends in Kazakhstan

Michael H.F. Wilkinson
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Pint

Cheers to him

Every time I see the ISS fly over (happens quite often whilst stargazing, I could even spot its overall shape with big binoculars), I just have to give quiet praise to the people up there, and the people who helped put them there. However we bemoan not doing enough space exploration, some people are dedicating and even risking their lives in the name of space exploration.

People like Cmdr Hadfield set a shining example in my book. Cheers to him and all like him

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ScaleMP: Use RAM plus vSMP, not flash, to boost server performance

Michael H.F. Wilkinson
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Re: Latency, it's all about latency

CSP is powerful. The main problem I find is in keeping communication down, especially in terms of how often processes need to communicate. It is much cheaper to have a few large chunks shuttled from on process to another, than it is to have a whole lot of little messages. It is not just the latency in that case (it also plays a role), but it is also the synchronization that costs time (barriers are particularly costly).

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Michael H.F. Wilkinson
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Boffin

Latency, it's all about latency

I have some rather memory-intensive code, that I did once run (or rather walk) on a ScaleMP machine (8 boards with 8 cores each (older incarnation)). Performance was dismal. Why? Each core thread may need access to each part of memory, because the outcome for each pixel in these huge images may depend on any pixel in the image, and you do not know beforehand which ones matter. Everything works hunky-dory as long as each processor only accesses the memory on its board, but the moment it needs large amounts of data from another board, latency kills performance. Getting a speed-up of 0.5 at 2 threads (if they weren't explicitly pinned to cores on the same board) is rather discouraging.

What they are doing is putting a software layer over a distributed memory or NUMA machine, so as to hide the complexities and allow shared memory algorithms to run (or rather walk) without the need to rewrite the code. ScaleMP does hide the actual NUMA architecture very well. Curiously, this leads to problems when optimizing the parallel code for that particular hardware. Because details are too well hidden. You really need to understand the memory architecture and the latencies of the machine to design the appropriate algorithm. Parallel programming on shared-memory machines and distributed-memory/NUMA machines are two very different ball-games, often requiring a careful rethink of the algorithms, in order to get the processors spend their time working, not talking (just like an old-fashioned classroom), or waiting for data.

A ScaleMP-like approach could work if the latencies are kept very low (like the QPI approach). On run-of-the-mill network connections (or even Infiniband), you need to rethink shared memory code, not so much because of bandwidth, but because of latency. For Cell/GPU type systems similar rethinks are needed, for much the same reason

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Your Flying Car? Delayed again, but you WILL get it, says Terrafugia

Michael H.F. Wilkinson
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Joke

Re: Eeeek!

Or: OOOK! as the librarian warns you not to land on the dome of the library.

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PayPal security boss: OBLITERATE passwords from THE PLANET

Michael H.F. Wilkinson
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Joke

Heel, FIDO! Heel!

Sorry, couldn't resist.

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Builder-in-a-hole outrage sparks Special Projects Bureau safety probe

Michael H.F. Wilkinson
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Joke

But, But, But...

Was he wearing suitable sun-block protection on his bare arms?

We must know!!!!!

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Coke? Windows 8 is Microsoft's 'Vista moment'. Again

Michael H.F. Wilkinson
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Joke

A statement with "Balmer" and "overly aggressive" only needs

"is" in between

More seriously, it looks like my decision to postpone the acquisition of a laptop until such time as MS backtracked was a good one

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Don't bake your Raspberry Pi - now you can WATER COOL it

Michael H.F. Wilkinson
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Coat

Obviously

The coolant of choice is raspberry juice

I'll get me coat

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We've done it - we've gone and made LONG-LIFE BEER

Michael H.F. Wilkinson
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Pint

I'll drink to that!

Who says all researchers live in an ivory tower?

Cheers

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So long, Hotmail: Remaining users migrated to Outlook.com

Michael H.F. Wilkinson
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Mushroom

Seen from the other side, Hotmail is a pain too

When people subscribe to a forum I help moderate, our software sends an authentication e-mail, with a link to let the user authenticate himself. Hotmail, and hotmail alone, corrupts the url we send, so an administrator has had to programme a workaround. Let's hope and pray that Outlook.com does mess up in the same way.

Standards? MS has heard of them, I recall.

I know, I am an eternal optimist.

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Thousands rally behind teen girl cuffed, expelled in harmless 'explosion'

Michael H.F. Wilkinson
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Re: Terrorist

Yep, noticed the same. Even the most measured posts are receiving thumbs down from somebody. Not necessarily an American though, there are plenty of idiots on either side of the big pond. Idiocy is very democratic in that sense

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Michael H.F. Wilkinson
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Re: Common Sense...

There is still a lot of common sense about, I see it all around me every day. I see morons too, of course, but they are in somewhat shorter supply. Modern communication technology just means you hear about the morons much quicker. Do not forget, people being sensible is not something that sells papers, or generates clicks on adds.

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Why next iPhone screen could be made of SAPPHIRE - and a steal...

Michael H.F. Wilkinson
Silver badge
Boffin

Silica <> glass

Silica or quartz is not (often) a true glass. Fused silica is used in optics, but due to the high temperatures needed for glass transition it is limited in its use. Typical glass combines silica (about 75%) with sodium and calcium oxides. So silica is the main constituent in many cases, but not the whole story. Most silica typically has a proper crystalline structure, and is not glass-like in many properties (e.g. thermal conductivity of glass is typically closer to that of certain liquids than that of crystalline silica or carborundum (alumina)).

</pedantry>

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COCK-A-DOODLE-DOO: NASA rovers scrawl giant willy on Mars

Michael H.F. Wilkinson
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Coat

It needn't be intentional, it could just be a cock-up

Sorry, couldn't resist. Sounds like it's time to go already

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Nvidia Tesla bigwig: Why you REALLY won't need x86 chips soon

Michael H.F. Wilkinson
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Boffin

Not all parallel programs have the same demands

There are many tasks that run like the clappers under CUDA. These are all those tasks that are of a more-or-less SIMD nature, like large matrix multiplications, Fourier transforms, and any other method that has a predefined processing order, preferably with a lot of micro-parallelism in there. Subtasks also need to be fairly isolated, to minimize communication load. For those tasks Kepler and Tesla-like processors are great (we have a couple).

However, there are also tasks in which the processing order is data driven, and where each processor might need to access arbitrary parts of the (large) data set here. I am currently doing multi-scale analysis of 3.9 Gpixel images, and doing that on a Kepler or Tesla board is a nightmare. Our 64-core Opteron machine gets between 32-50 times speed-up, because this algorithm is best using coarse-grained parallelism. X86-64 machines are not going away soon, and GP-GPU-processing is not a panacea (great though it is).

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BlackBerry OS 10.1 leaks its secret goo over all the web

Michael H.F. Wilkinson
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Pint

Re: Mrs F....

I cannot say that the fact that one particular missus cannot understand a phone is the best measure for usability. My missus moans about her android phone endlessly (which my kids understand in the blink of an eye), but at the same time refuses to listen to any advice (like what different buttons/apps do, what gestures are available, etc). In quite a few cases I find that moaning is not about getting help or advice, it is purely about getting attention. If you truly solve the problem, you deny them the chance to moan about that again.

BTW, this is not a female thing: we have several excellent and technically very competent female PhD students here. It is much more of an anti-tech mindset that some people develop.

Sorry, end of rant, it has been that kind of morning. Beer, because I feel I am in need of that.

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