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by gritz
Sun Apr 28, 2013 12:03 pm
Forum: Off topic discussion
Topic: "Big brother to switch off your fridge"
Replies: 64
Views: 7459

Re: "Big brother to switch off your fridge"

i'm not sure I want to justify the Daily Fail's existence by generating another hit for their website! Slow news day? They're probably apoplectic with rage that as crime figures are apparently on the way down at the moment they've actually got to think about something else to write about... One scen...
by gritz
Sat Apr 27, 2013 12:59 pm
Forum: Off topic discussion
Topic: How to Publicize a Program
Replies: 9
Views: 2088

Re: How to Publicize a Program

Yeah, having your own webpage is essential as a way of keeping all the relevent info. re overview, philosophy, updates, tutorials, etc, all in one place. Publicising it on a few well - chosen hobbyist forums is good, but bear in mind that if your "Hi, I've made this" opening gambit is your first pos...
by gritz
Sat Apr 27, 2013 10:32 am
Forum: Off topic discussion
Topic: Parallella: A Supercomputer For Everyone
Replies: 156
Views: 46131

Re: Parallella: A Supercomputer For Everyone

Thanks for the explanation John. So it's a new spin on the old argument of "dedicated DSP hardware v. general purpose computer and software" - including "integer v. floating point". There really is nothing new under the sun, is there?
by gritz
Fri Apr 26, 2013 11:43 pm
Forum: Off topic discussion
Topic: Parallella: A Supercomputer For Everyone
Replies: 156
Views: 46131

Re: Parallella: A Supercomputer For Everyone

I recommend a recent article in IEEE Spectrum: "Next-Generation Supercomputers" by Peter Kogge ( link ). One very interesting point made is that electrical power is seen as the limiting factor, and that power is increasingly used to transfer data between processors rather than actual arithmetic ope...
by gritz
Fri Apr 26, 2013 11:07 pm
Forum: General discussion
Topic: Raspberry Pi vs. Beagle Bone Black
Replies: 177
Views: 73229

Re: Raspberry Pi vs. Beagle Bone Black

This is a bit of a parallel to the ummm... Parallella thread. More resources don't necessarily mean better outcomes. The one area where we've seen substantial gains in terms of geting a quart out of a pint pot in recent years is in mobile computing - and it's not about the code (in the main) but ab...
by gritz
Fri Apr 26, 2013 9:30 pm
Forum: Beginners
Topic: Supercaps and the RPi
Replies: 7
Views: 1600

Re: Supercaps and the RPi

For those of you really interested in the finer details of capacitor discharge, The voltage reduction would not be linear if the current draw on the capacitor remains constant. See the below link Capacitor discharge (voltage decay): V = Voe-(t/RC) [url][/http://www.schoolphysics.co.uk/age16-19/Elec...
by gritz
Fri Apr 26, 2013 4:35 pm
Forum: General discussion
Topic: Raspberry Pi vs. Beagle Bone Black
Replies: 177
Views: 73229

Re: Raspberry Pi vs. Beagle Bone Black

The Foundation (why do I keep thinking of Asimov, Seldon, and The Mule every time I type that? ;) ) ... Yeah...but who gets to play the part of the Empire? Microsoft? Empire, Schmempire ... I wanna know where the SECOND Foundation is ... "at the opposite end of the galaxy" ... think about where it ...
by gritz
Fri Apr 26, 2013 4:08 pm
Forum: Off topic discussion
Topic: Parallella: A Supercomputer For Everyone
Replies: 156
Views: 46131

Re: Parallella: A Supercomputer For Everyone

I'm not sure that this is an invention per se, it's just a cheaper way of getting more of the same. Consider x86 (as mahjongg mentioned previously). The capabilities of the x86 increased over the last decade to the point where it left behind all but the most demanding applications (and the absolute ...
by gritz
Fri Apr 26, 2013 3:20 pm
Forum: Off topic discussion
Topic: Parallella: A Supercomputer For Everyone
Replies: 156
Views: 46131

Re: Parallella: A Supercomputer For Everyone

Parallel processing has been around quite long enough to show that its a dead end.It might seem to offer powerful solutions but any gain is lost in set up overheads.. With all due respect that sounds a bit like saying "Nobody will ever need more than 640k RAM" May I remind everybody that our own br...
by gritz
Fri Apr 26, 2013 3:03 pm
Forum: General discussion
Topic: AC to DC power [solved]
Replies: 17
Views: 4197

Re: AC to DC power

Remember also that what is commonly referred to as (in your example) 26V a.c. refers to the RMS voltage (this is what aTao is referring to). When you apply that to a full wave rectifier you get 26 * 1.414 = 36.8V peak (minus a diode drop or two). Apply this to a reservoir capacitor and it'll fill in...
by gritz
Thu Apr 25, 2013 10:58 pm
Forum: Off topic discussion
Topic: Can you live on £53 a week?
Replies: 39
Views: 6817

Re: Can you live on £53 a week?

pygmy_giant wrote:
I think we should all go ferral like the cats, climb through other people's windows and curl up asleep on their beds while they are out.
The anarchist in me approves. :)
by gritz
Thu Apr 25, 2013 9:26 pm
Forum: Off topic discussion
Topic: Can you live on £53 a week?
Replies: 39
Views: 6817

Re: Can you live on £53 a week?

:shock: Where did that come from, pygmy_giant?

I wonder what's next on the list - passports for migrating birds?
by gritz
Thu Apr 25, 2013 5:59 pm
Forum: General discussion
Topic: Windows Compatiability
Replies: 39
Views: 4783

Re: Windows Compatiability

lewmur wrote:
But we are getting way off topic, so this is my last post on the subject.
Mine too! And I haven't even had a rant about Google and their schonky practices... :D

Big business controlling government policy is nothing new. I wouldn't mind so much if they all paid their taxes.
by gritz
Thu Apr 25, 2013 4:55 pm
Forum: General discussion
Topic: Windows Compatiability
Replies: 39
Views: 4783

Re: Windows Compatiability

Your arguments seem to be wandering all over the place. What's your point? 1: Libre Office is ONE of the choices that DOES meet the ODS. note: Open Documenst Standard does not equate with "those industry standards". It is a standard established by an international body to bring order to electronic ...
by gritz
Thu Apr 25, 2013 2:27 pm
Forum: Off topic discussion
Topic: Can you live on £53 a week?
Replies: 39
Views: 6817

Re: Can you live on £53 a week?

I thought it was a bit rich that Cameron is demanding that all new student nurses be made to work for a year as a healthcare assistant first to get relevant experience. (This in light of the recent deaths in staffs. Of course a nurses to patient ratio of 1:20 and collapsing two wards so that patien...
by gritz
Thu Apr 25, 2013 2:20 pm
Forum: Off topic discussion
Topic: Can you live on £53 a week?
Replies: 39
Views: 6817

Re: Can you live on £53 a week?

:lol: Revolution is a fickle father.

http://www.youtube.com/watch?v=A8qakI4mDII

The Far East may make all our chips, but the Russians have the best choirs.
by gritz
Thu Apr 25, 2013 2:02 pm
Forum: Off topic discussion
Topic: Can you live on £53 a week?
Replies: 39
Views: 6817

Re: Can you live on £53 a week?

" We (Germany) mastered the economic crisis like no other country. We can be proud" . Yeah, sure. I know that it is of little comfort but politicians in the UK also lie like cheap watches. It is particularly worrying that the major export of the UK seems to be politicians. We 'retire' them to Europ...
by gritz
Thu Apr 25, 2013 12:56 pm
Forum: General discussion
Topic: Windows Compatiability
Replies: 39
Views: 4783

Re: Windows Compatiability

Enforcing the use of open source software? Militant liberalism at it's finest! Whether an enforced lack of competition would do anything to improve the quality of the end product is another matter completely. And who decides which software to use? Perhaps they might have a vested interest. Life is ...
by gritz
Wed Apr 24, 2013 6:58 pm
Forum: General discussion
Topic: Raspberry Pi vs. Beagle Bone Black
Replies: 177
Views: 73229

Re: Raspberry Pi vs. Beagle Bone Black

I think this is very similar to the original RaspPi vs. Ardunio argument. As it turns out they're highly complimentary (look at the Gertboard which adds an Arduino to the Pi in a rather nice manner). Yes, the Arduino, and how the irony worked out for me. I hadn't heard of Arduino before the Pi, and...
by gritz
Wed Apr 24, 2013 6:32 pm
Forum: Off topic discussion
Topic: Bl**dy Micro$oft, Bl**dy Windoze.....
Replies: 42
Views: 5335

Re: Bl**dy Micro$oft, Bl**dy Windoze.....

feverish wrote:Ah! The good old days. Nostalgia, these days, ain't as good as it used to be.
It's certainly harder to reverse engineer sometimes!
by gritz
Wed Apr 24, 2013 4:04 pm
Forum: General discussion
Topic: Windows Compatiability
Replies: 39
Views: 4783

Re: Windows Compatiability

There is only one reason that I know of to want to use Windows on a Pi and that is "political". There are schools that require students to have devices that run Windows so they can teach "Office" apps. There is, actually, one version of "Windows" that could run on the Pi and that is Windows CE. Of ...
by gritz
Wed Apr 24, 2013 1:30 pm
Forum: General discussion
Topic: Windows Compatiability
Replies: 39
Views: 4783

Re: Windows Compatiability

Yes, but Win7 doesn't run on many older systems, for one, it needs 1GB or RAM, and XP is still very happy with just 512MB , by now you often cannot even find the right RAM to update a 7 year old PC! XP SP1 may be "happy" with 512mb but SP3 certainly isn't. While SP3 will boot with 512, it is so slo...
by gritz
Wed Apr 24, 2013 11:40 am
Forum: Off topic discussion
Topic: Bl**dy Micro$oft, Bl**dy Windoze.....
Replies: 42
Views: 5335

Re: Bl**dy Micro$oft, Bl**dy Windoze.....

I remember using (plasticised) paper tape into the '90s for loading prorams into CNC turning centres at the aerospace company where I did my apprenticeship. It seems a bit incongruous now, as the machines in question could perform very eye-catching 3d simulations of those programs (it was always a g...
by gritz
Wed Apr 24, 2013 10:49 am
Forum: Off topic discussion
Topic: Parallella: A Supercomputer For Everyone
Replies: 156
Views: 46131

Re: Parallella: A Supercomputer For Everyone

My point is that all this "it's a gamechanger" hype is so old. Last week I had to dig through a pile of twenty-year-old technical magazines to find a particular article. The "news" sections were full of revolutionary ideas - the vast majority of which have proved to be dead ends, or haven't yet bee...
by gritz
Wed Apr 24, 2013 2:59 am
Forum: Off topic discussion
Topic: Parallella: A Supercomputer For Everyone
Replies: 156
Views: 46131

Re: Parallella: A Supercomputer For Everyone

Any teacher who is fluent in openCL and the rest is probably in the wrong job imo.

If only it were all about the hardware, but it never is.

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