Quick fire shutter
I'm quite impressed at getting the shot at all, 1.35ms isn't very long at all to take a snap!
121 publicly visible posts • joined 3 Aug 2009
Not the special water (although de-ionised water would be a good idea otherwise you print head might scale up!), but they'd just transfer the cost to the paper (which has to be specially preprepared) and they'd make sure that it was only their premium paper world work in their printer.
It's a sad reflection on human nature, unfortunately.
I have seen it occur a number of times in different organisations where volunteer labour is used. Someone volunteering there is doing it because they like it, and think it's a worthwhile cause, so the usual relationship between the company and employee doesn't exist.
Combined with some peoples tendencies to let a little power go to their head, and suddenly they think they are running ICI.
I'm sure they'll work it out, but I suspect the path will be littered with further incidents like this, which will help no-one at all, which is a pity as it wastes effort and demoralises others.
We had a similar setup connected to Middlesex Poly's DEC 10, It was fantastic. We lost the connection in the mid 80's when the Poly updated their systems and didn't support 110baud any more. There was a suggestion of upgrading the line to a Token K (300baud - ohh!), but that required money and there didn't seem to be much of that in education in the mid 80's.
I also recall seeing a computer science teacher get a near hernia from carrying the ASR-33 up the stairs!
They probably could, but it would have involved a lot of small children inside the the structure, holding the 'dolly' as someone outside riveted it with a steam hammer. "Loud" would not begin to describe the noise!
See also the films of building a riveted ship, where they throw the red hot rivet from one to another.
Look also at the Foxton Inclined Plane.
The impression from the film was what it was left in lunar orbit?
What's with the dreadful film score music? Some ballet music would have been better, given the process involved in celestial mechanics of large masses and small forces. Dance of the Sugar Plumb Fairy perhaps?
I didn't mention the quality of the train service they provide or the value for money of off peak tickets, both of which I will take you word for it are fantastic.
I was referring to the annual subsidies paid to Virgin for running the train service, and the complete fiasco that was the WCML upgrade that they negotiated and was part of the incentive for them to take the contract.
The upgrade was meant to cost £2billion and give us a 140MPH railway. Instead we spent £9billion and ended up with a railway that you could only do 125MPH, in parts and 110MPH on the rest.
The "backup dam which had been built around the tanks" is generally called a bund. You'll find them around oil tanks and the like to catch the leak rather than letting it just soak in to the ground.
The bund is often open, which helps you see if there's anything in it, but this also means that they accumulate rainwater, which has to be drained off.
As an aside, I seem to recall that The Register you to sell little beta sources. Those glowing key fob things, which held phosphor coated vial of tritium.
Yes. Some NATO exercise in Europe in the mid eighties. I recall reading it on the EE Lighting stand at Duxford IWM.
From: http://en.wikipedia.org/wiki/English_Electric_Lightning
"In 1984, during a major NATO exercise, Flt Lt Mike Hale intercepted a U-2 at a height which they had previously considered safe from interception (thought to be 66,000 feet). Records show that Hale also climbed to 88,000 ft (26,800 m) in his Lightning F.3"
Also, when did "massive novel civil engineering project" and "on-budget" come in the same sentence?
It one of the more silly ideas I have come across recently.
File under:
Mono-Rails (the Simpsons episode says it all)
Maglevs (Yes, i do know there are some in use, but they are just status symbols, whose function could be replaced much more cheaply, at only slightly lower performance, with conventional HSR)
Goerge Bennie's Rail-plane
etc.
The pump storage at Ffestiniog pre-dated this slightly (commissioned 1963), but it uses separate pumps and turbines. It was built to compliment the nuclear power at Trawsfynydd.
The one at Dinorwig (which uses reversible pump/tubines like Cruachan) is just huge though, and has some impressive stats: 0 to 1.3GW in 12seconds flat. Also It can also be used to "Black Start" the grid.
For a long time the civilian GPS signals has a deliberate jitter which reduced the accuracy even further. This was turned off in the mid 90's, I think. Apparently the latest satellites don't have this feature in them.
As for hacking the Military signals (even by a Nation) is very difficult, as despite all their flaws, they do have some clever Boffins who are very good a crypto.
(Icon chosen for it's relevance to the application of GPS.)
Please don't think this will men you can use US "915 Band" equipment in the UK.
The FCC and IC 915 Band stretches from 902 to 928MHz, so is much wider than this new allocation.
The band is squashed in around the GSM900 Frequencies. Uplinks (phone to base station) are 876 to 915 and downlinks are 921 to 960, which is one of the reasons that the US use GSM850 instead.
There was a lot of research in to mechanisms for storing data, because it was a previously untackled problem before. Telephone and telegraph systems didn't store data, just transmitted it onwards to the next part of the system.
For fast access you need a pure electronic bistable circuit to record a binary state, but these use several valves each, and so you only used them on the internal registers of the CPU itself.
Another, a bit later, was to use a CRT with long persistence phosphor. You mounted a 2D array of photodiodes across the screen and implemented a refresh cycle circuit.
The flicker at silent film rate of 18fps is just as likely to trigger photosensitive epilepsy, as at 24fps. The general sensitive range is 16 to 25Hz.
I'm still slightly unsure about the enthusiasm for higher def projection (tv or cinema). Cinemas are getting smaller and my TV is about the same size as it's always been. I put up with VHS for over twenty years!
It's not the picture itself that counts but what's in the picture.
Also, don't forget cinemas too.
Whilst there is more and more digital projection, there are still a very large number of theatres out there that only have equipment to project standard 35mm print.
At 90ft per minute a two hour feature print in 35mm is about 2 miles long. That's a lot of stock for all those prints.
"No, that would be infrared"
No, they were right. A rainbow has red on the outside of the curve (longest wavelength, so most refracted) and violet (shortest wavelength, so least refracted) in the inside.
So UV would appear inside that, and thus as the original A.C. said, under the rainbow.
You have to set the time yourself through the modules serial interface (It's not RS232, it's TTL level serial </pedant>).
I would imagine that Hoptroff have designed some mechanism to do that with the classic winder that you have on pocket watches.
All you are getting with the Cs source is a very stable time reading, not an absolute measurement of time.
but I'm still not clear what's novel. Why is comparing a Trent900 (10,000rpm and >70,000lb thrust) with a rope (0hp) useful?
Other flywheels I know of:
The JET project has two 9m dia. 775 tonne energy storage flywheels: www.jet.efda.org/wp-content/uploads/Focus_on.pdf
On a rather smaller scale, firms like Parry People Movers have been using them to even out load in a mass transit situation. http://www.parrypeoplemovers.com/
So how much does the "printing" machine cost?
Quite how much 18mm ply would a three bed detached house use?
There will need to be a fair amount of foundations, insulation and roofing material that you won't make out of 18mm ply.
Also there are the complications that electricity and gas installations need to be signed off by a suitably qualified person.
I thought someone would get there before me!
The Cray-2 used a 3M Fluorinert liquid for cooling. It's a fantastic liquid for the job, but being a CFC it's use was phased out. Although the 3M website doesn't seem to explicitly state it, it looks as if the Novec is a replacement. Look up "3M Novec Engineering Fluids".
The biggest issue is that you have to make the server cases liquid tight, and all the associated plumbing. A leak means the liquid gets out, the air gets in and your servers fry.
Also these liquids are not at all cheap, which is why people still work with water/glycerol (anti-freeze)
I do wonder how much would this many column inches would cost if you had to pay for the publicity? Quite a lot in the NYT I would imagine, never mind all the other places this slanging match has been reported.
There's no such thing as bad publicity. Having a shouty CEO is part of the publicity machine.
I'm impressed by your resourcefulness.
Solar Heated hot water can work quite well, and cheap versions can be knocked up with domestic radiators. Then a washing machine that has a hot fill could be used in the evenings (they may be more readily available in E. than they are now in the UK, where heating with 'lecy is seen as more efficient).
More likely an electrical sparkle, as they had electrified a large part their railways by the middle of the 20th century.
Bizarrely (due to coal shortages whilst the rest of Europe was in the midst of WWII) they even put electrical elements in some of their old steam engines! See the splendid Douglas Self:
http://www.douglas-self.com/MUSEUM/LOCOLOCO/swisselec/swisselc.htm
R5 to R9 are 10k, and so the LED current with a 12V source will be about 1mA and you probably won't be able to see them in the sunshine. I suggest a magnitude less.
I would be concerned that the frequency of the fail-safe timer is rather temperature dependant. I would recommend a crystal oscillator (32kHz with +/-20ppm spec over -40 to +85 are tens of pence).
There seems to be a lack of local decoupling on the micro or any of the other ICs/Modules.
Fuse, or otherwise protect, the incoming supplies, otherwise a loose ground wire accidentally touching of the through hole components will take tracks off you circuit board.
IC5 will dissipate significant power. Make sure it has a decent heatsink (useful to keep the electronics warm) or use a switch mode module (about a fiver in small volume) that are nominally drop in replacements for the old 7805 devices.
Keep up the good work!
All those who want to use an auto-car pissed , stoned or asleep, probably ought to read the second paragraph of the bill:
"This bill would authorize the operation of an autonomous vehicle, as defined, on public roads for testing purposes, by a driver who possesses the proper class of license for the type of vehicle being operated if specified requirements are met, including that the driver be seated in the driver’s seat, monitoring the safe operation of the autonomous vehicle, and capable of taking over immediate manual control of the autonomous vehicle in the event of an autonomous technology failure or other emergency."