* Posts by Chemist

2677 publicly visible posts • joined 24 Mar 2010

The 64-bit question

Chemist

Standard out-of-the-box on OpenSUSE

firefox: ELF 64-bit LSB executable, x86-64,

Chemist

Re : True

Unless you want to run the moon landing game - I think that took almost all ( maybe 248 bytes ?)

Fukushima situation as of Wednesday

Chemist

That seems highly suspect

You can't keep radiation levels a secret !

All sorts of people will be measuring, near and far. After Chernobyl, for example, the pharmaceutical research site I worked at in England ( >2000km away) spotted the abnormal levels very quickly because they were concentrated on ventilation filters. It's so easy to detect extremely low levels of ionizing radiation

Fukushima is a triumph for nuke power: Build more reactors now!

Chemist

For the last time !!

"Steam which has been superheated as in a reactor core can break up into hydrogen and oxygen"

NO IT CAN'T

People have been going 2H20 > O2 +2H2

The equilibrium for this reaction lies HEAVILY to the left at reasonable temperatures

Water only dissociates to 3% hydrogen 97 % water at 2000 C . The water has to react with something to generate significant amounts of hydrogen This would seem to be zirconium in the fuel rod casings by all accounts

Threat to third Fukushima nuke reactor

Chemist

why they overheated? → #

The primary reaction has shutdown but highly radioactive waste products with very short-half-lives generate a considerable amount of heat as they decay. Without cooling, depending on the reactor design this can lead to overheating and potentially melting

Chemist

It's not just dissocation of water.

The equilibrium even at 2000 C is ~3% hydrogen 97 % water. Catalysts don't affect equilibria only rate. The hydrogen is being produced in a chemical reaction - probably zirconium fuel rod components reacting at high temperatures with water/steam

openSUSE 11.4 rocks despite missing GNOME

Chemist

Ditto

Been running it since the early SuSe distros. Rock solid - running on 6 machines at the moment on 11.2

Second explosion rocks Japanese nuke plant

Chemist

Re : Garbage? #

He's quite correct water doesn't break down appreciably even at 2000 C. Even then it's in equilibrium with only a small percentage of free hydrogen/oxygen.

The only way of generating sig. free hydrogen is to react the water with some material such as zirconium as others have mentioned

Chemist

yellow/orange flame

Every time you heat dust it gives a yellow flame due yto the amounts of sodium salts around. Anyone who has banged a lab bench with a bunsen burner running will have seen that.

Chemist

No it's not.

Thermolysis of water proceeds to only a small percentage even at ~2000 C.

The hydrogen is coming from something, probably metal, reacting with the steam/water at high temp.

Chemist

As I understand it

You don't !

Chemist

where is the Hydrogen coming from?

I'd guess it's some component of the fuel rod assembly reacting at high temperature with steam

Japanese nuke meltdown may be underway

Chemist

solar has the side effect of trying to give us all skin cancer.

What !!!!!

Emergency declared at second quake-wracked Japanese nuke plant

Chemist

The BBC are reporting..

that they did have diesel generators but these failed after (?) hours.

EU ministers give approval to patent scheme

Chemist

What make you think ..

That filing a patent is easy. In the UK & EU patent filings are examined. The documents are detailed and extremely tedious and take a large chunk out of ones working life.

NASA aims for space tests of Mars-in-a-month plasma drive

Chemist

Just a guess..

'cos I'm an organic chemist but maybe it forms a plasma more readily. Its ionisation potential is quite low whilst having reasonable mass.

On the other hand maybe it's the blue glow that makes your spaceship look like a 'proper' spaceship

Canonical pares Ubuntu down to 2 editions

Chemist

Let me fix that

The quote is : ""matter can be neither created or destroyed in a CHEMICAL reaction"

Chemist

I have a netbook (Eee 1000HE)

Mine is flawless also

Honey I shrunk the chip ... now what?

Chemist

There seems little that can be done conventionally.

Reach a certain size and quantum effects will take over. Already quantum tunneling is a problem - get much smaller and it will be dominant. Time to rethink the paradigm.

French gov infiltrated by data-hungry spear phishers

Chemist

"running OpenVMS and still got infected."

Nonsense.

To quote from your ref.

"The Trojans came via a PDF attachment in an e-mail."

It was a PDF in an email. I don't know about OpenVMS biut the Linuxes I run wouldn't have got infected AND I doubt if OpenVMS would either

HP to put a WebOS in every PC

Chemist

It depends

It could dual boot just as Windows & Linux can now or it could run WebOS in WIndows (or Linux) using VirtualBox just as either can now. WebOS in any case is just basically Linux

Spaniards bemoan 'joke' speed limit cut

Chemist

Re : What !

What cross-grained moron downvoted this.

It's a FACT - my wife's TOURAN is the same - for that matter every car I've ever owned has been better than 20 mph /1000 revs (since 1969). My motorhome at 3.5 tonnes does ~30 mph/1000 revs.

For goodness sake disagree with an OPINION but this info. is available on VW's website

Chemist

Hence, double speed requires 8 x power.

But you'd only travel for half the time so the fuel consumed would be 4 times as much

Chemist

From the BBC

"They point to studies suggesting that a 10km/h reduction in speed saves closer to 5% on fuel rather than 15%. The government's own figures suggest it could forfeit large sums in tax revenue due to the fuel savings. And the bill for changing the road signs for just four months runs to 250,000 euros."

Mind this is the same BBC that has 130kph translating as 75 mph or 81 mph on two adjacent lines

Security agency calls time on botnet FUD

Chemist

"I seldom see junk mail these days"

Certainly I use Plusnet, have had my email address for years, and my experience is that very little spam gets through (1-2 /month compared with 10+ a day a few years ago)

Cure for BALDNESS causes IMPOTENCE, says new study

Chemist

What !!!!

You must be out of your mind !

(One of my mates invented Arimidex)

Govt working on 'browser-based' solution for new cookie law

Chemist

"working with browser manufacturers"

You can just see the scene : a grimy factory, belching smoke, grim-faced workers enduring noise, soot and low-wages bashing out, probably with steam hammers, countless billion browsers a shift.

New 'supercritical' generators to boost nuclear output by 50%

Chemist

"how much is this like a magnox reactor then"

No at all. This governs the working fluid in the turbine stage - which will be steam in any conventional nuclear plant

Google vanishes 'DroidDream' malware from citizen phones

Chemist

"That's something for Linux users to think about,"

I thought about it - a long time ago - Microsoft's cr*p doesn't go near my systems.

NASA scientist spies extraterrestrial life

Chemist

Problem is ..

Anywhere outside the solar system is such a dickens of a long way away that the chances of a very fast chunk of rock arriving here, finding the Earth, surviving entry AND containing signs of life seem pretty remote

Chemist

"..and could be the origin of life on Earth."

I've heard this several times but it just seems to push back the origin to somewhere else it doesn't explain how life began

Sinclair ZX81: 30 years old

Chemist

For all who loved messing with the MK14....

Get yourselves a handful of 18F PICs (http://www.microchip.com/) and a programmer. It's easy to set one up to do all sorts of jobs and hook it up to a PC via a serial or serial/USB converter. One of mine is providing me with info about my house (temperatures etc.) via a small server program on my fileserver even though I'm 800 miles away in Switzerland.

Another is emulating a serial port chip on my homebrew FORTH 6809 system.

Cheap, robust, versatile and available in 0.1" pin spacings so PCBs can be made using laser printers by printing the mirror image onto photo paper, ironing that onto clean copper board, soaking off the paper and etching the board.

Chemist

MK14

Still have mine. 256 bytes of memory

Programmed it in raw machine code. Nothing like it for building character or driving you insane

So grateful for an 6502 assembler on my next machine ( UK101 )

Cobalt-barrel machine guns could fire full auto Hollywood style

Chemist

poisonous

Chronically poisonous, not acutely, so rather a slow assault weapon

Yanks outweigh Canucks: Official

Chemist

Not exactly

but it's certainly rather poor. Very fit, muscular athletes are often rather high BMI but low body fat

4 points.

It's better to be the 'correct ' weight AND fit, but it seems better for health to be fit and rather overweight than unfit and 'correct' weight.

There seem to be better measures of weight, BMI is just the easiest to measure but studies have shown that % of body fat or even just waist measurement are better predictors of poor health outcomes. Very fit, muscular athletes are often rather high BMI but low body fat

Exercise does seem to be VERY important for long-term good health.

Because of chance & biological variation lots of people will experience different outcomes.

Chemist

Changed it for you

PS: Could it be all that food they eat down south?

Seriously the combination of even a little too much food combined with too little exercise is enough to explain it all. A single slice of bread needs a mile of walking to burn it.. Eat just 100 cals a day over what you need and thats 36500 cals a year and that's ~4.5kg of excess weight. & that's ~1.5 -2 BMI units (OK BMI is a poor measure).

Chemist

Re : and the obesity index for England is

I think it's currently about 25% for adults. Depends on the definition. I'm assuming BMI ( for all it's faults !) >30

Firesheep hack catches out Mr Demi Moore

Chemist

Re : Firefox update?

Typo I presumed

Portsmouth redefines the Olympic-sized swimming pool

Chemist

Er, don't know but he did say ..

"The problem with chemistry is that it's too difficult for chemists " or similar

Stock Exchange says soz for downtime

Chemist

Link

Borsa Italiana runs on the TradElect system, based on Microsoft .Net and written in C#

http://www.computerworlduk.com/news/it-business/3262202/lses-borsa-italiana-halts-trading-after-price-information-glitch/

Chemist

Except ..

AFAIK Milan uses Windows/.NET

Godson: China shuns US silicon with faux x86 superchip

Chemist

I'm puzzled

Although emulation is mentioned in the article I can't see any performance figures. Is it me ? The only performance mentioned relating to 80x86 is the 30% hit on emulation. I assume the main use will be running native code under MIPS variant Linux.

SeaMicro drops 64-bit Atom bomb server

Chemist

Oh sure

Yes I appreciate that - I was just puzzled by the comment "but he is very enthusiastic about the Atom family, particularly now that it runs 64-bit code," which makes it sounds as though this is a recent thing.

I built the file server when I needed it - I'd much rather have an even lower powered one.

Chemist

"Atom family, particularly now that it runs 64-bit code"

Rather puzzled by this comment as I've had a Atom dual core 330 running 64-bit Linux as a file/print server since 2009.

How to make power conversion less sucky

Chemist

Shouldn't that be ...

and lose 1KW or ~1.5%

(100^2)*0.1

Electric cars not as 'green' as advertised

Chemist

"there's excess relatively-clean power being generated, what could I do with it to make a profit?""

Just reinforce your argument. Where is this so-called excess power going ? What's getting very hot ?

Chemist

I wasn't supporting the use of cryogenic hydrogen...

but irneb's post I was replying to said :

"....as it would be to hold enough H2 in a canister at thousands of atmospheres to get it into its liquid form "

I was merely pointing out that hydrogen can't be liquified by pressurization. Further even liquid hydrogen has a much lower energy density than hydrocarbon.

By the way considerable research is being done into the use of cryogenic hydrogen by BMW and others

I'm no fan of using pure hydrogen as an energy carrier unless the numerous practical problems can be overcome, maybe by on-board generation from precursors (formic acid for example -which brings it's own set of problems)

Unfortunately even fuel cells have a low-ish efficiency (~50% tank-wheel) esp.when combined with the efficiency of hydrogen production. No doubt some considerable improvements remain to be made.

Chemist

"H2 in a canister at thousands of atmospheres to get it into its liquid form"

Er, you can't. It needs to be cooled at great energy cost to liquify it

Generating hydrogen by electrolysis doesn't need high voltages but it does have a low-ish efficiency. (OK if you can use the waste heat)

Chemist

"They won't be making extra electricity to power ....... electricity is already available"

I suggest you don't comment on something you clearly don't know anything about.

What rubbish, electricity is generated to demand. More demand - more generation

Google wheels (another) Trojan App inside Microsoft Office

Chemist

It's the printer drivers

It isn't !

The vast majority of printers work with Linux. Even cheapo scanner/copier/printers have printer drivers.