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* Posts by Chemist

1879 posts • joined 24 Mar 2010

HP douses firebomb printer hack threat

Chemist
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Halt and Catch Fire

I think that was Motorola 6800 or 6809 CPUs - I can't remember

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Chemist
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However..

this is a laserjet issue I understand

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Chemist
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"a component used to dry ink"

That'd be the fuser used to melt toner onto the media

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The BBC Micro turns 30

Chemist
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Re : Re: Ah !

I've still got a chart of the (gigantic) number of op-codes on my study wall. Spent a long time writing 6809 assembler including a floppy disk driver & formatter for my home-brew Forth system

Simpler days !

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Chemist
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For those who wonder why Branch Always is useful ..

Using a sub-set of 6809 op-codes you could write true position-independent code and I think BRA was the JMP relative version of JMP

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Chemist
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Ah !

6809 - yes !

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LOHAN: Reader vacuum pump plans really suck

Chemist
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"Don't these things get used in labs anymore"

Less and less - they use an enormous amount of water unless a pump recirculates in a closed system.

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Chemist
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"not a 15mm reduction from atmospheric pressure."

A lab water pump will get to ~~15mm Hg absolute .

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Toshiba readies zero Watt standby mode telly

Chemist
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"just use the huge PSU caps"

They self-discharge far too quickly

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Revealed: Full specs on Mars rover's nuclear laser heat ray

Chemist
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"didn't we recently find some lifeform which lacks carbon"

NO !

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Chemist
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Angel

To give a fuller answer ..

No you were wrong about the arsenic bit.

The reason why carbon seems so important is that it's got a lot of useful properties all in the one element

It can bond with 2,3 or 4 other atoms either with single. double, aromatic or triple bonds. It's reactivity can be altered relatively easily to make or break bonds. Long carbon chains can be relatively stable. Other elements don't have all or most of these properties. I could go on but it would end-up being a text-book in organic chemistry.

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Psst, kid... Wanna learn how to hack?

Chemist
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Just tried that ..

on my aging laptop and got a 1GB file in ~15 secs.

How fast can you sidle ?

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Word and Excel creator: How Gates, Jobs and HAL shaped Office

Chemist
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"world is so much better off in having the Windows standard"

Shouldn't that be -

"Microsoft is so much better off with the world being forced to have Windows as standard" ?

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Will Mars rover Curiosity be the last of its nuclear kind?

Chemist
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"Rossi had better be nominated for the 2012 Chemistry Nobel... !"

Ha, ha, ha ......

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Chemist
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What they want for the generators ..

is Pu 238 which is not fissile but generates a high decay heat

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Rock star physicist Cox: Neutrinos won't help us cheat time

Chemist
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"Where are all the space/time believers?"

Every time anyone uses a GPS they are getting data that has been adjusted for the effect of spacetime being distorted by Earth's mass.

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Chemist
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This is the most blatant ignoring of data ..

That I've read in a long time.

No wonder you're an AC

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Chemist
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"universe to 'see' another approaching it at >2.0c "

Worst than that.

The two proton beams at the LHC each almost travel at c. To an observer outside the beam it appears that the closing speed is ~2c, but to an observer traveling with a proton the closing speed will always appear to be <c

It's one of the reasons relativity always appears so bizarre to non-relativitists Worth looking up 4-velocity.

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Chemist
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"Space-time is already bent by gravity"

Noooooooooooooooooooooo !

That's not General Relativity - it's almost the opposite

The presence of matter & energy curves spacetime - the effect of moving through 'bent' spacetime is *perceived* as a fictitious force called gravity.

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Chemist
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"trying to do is simply explain the findings"

Oh, good grief !!

What they will be doing first is to try and duplicate the finding, preferably somewhere else with different equipment

Only on the basis of good hard experimental results that disagree with SR ( which has HUGE existing experimental support ) will there be a need for theorists to get involved.

Anything else is pure speculation for speculation's sake

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Boffins find new 2012 glyph on 'secret' Mayan brick

Chemist
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"the cosmos is regenerated"

So was it or was it not regenerated ~5200 years ago ?

Must check the house insurance.

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Graphene circuits from an inkjet printer

Chemist
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NMP

Used extensively in the fine chemical industry - it's a high-boiling point dipolar aprotic solvent meaning it has a high dipole that helps to solubilize materials but isn't capable of ionizing under 'reasonable' conditions.

Reading the data sheet is a bit like looking up your symptoms in a medical dictionary - scary

With correct handling, ventilation and recycling it's no problem. Doesn't mean that you should be using it in a 'normal' inkjet printer though

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Chemist
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Just use

a pencil !

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Not so fast: Italian boffins say neutrinos not faster than light

Chemist
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"You seem to believe you're an expert on this topic.."

I don't need to tell you anything - you already seem to know it all

As for Are they moviing faster than C?

Or are they traveling on a shorter path?

Until the experiment has been repeated by independent labs using diff.equipment then there isn't anything to explain.

As several other people have pointed out your understanding of GR's explanation for gravity is deeply flawed.

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Chemist
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"Except that neutrinos don't seem to be effected by gravity."

Why do you keep repeating this - there's no evidence whatsoever that it's true !

Even photons with no rest mass are affected by gravity as predicted by GR

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Chemist
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Incidently...

I've just looked at the detector web-site. The detector stack is 25 m long ! so the transit time for a light speed particle would be about 80nS

I assume the detection events are found over the entire length and then averaged in some way

http://www-opera.desy.de/pics/detector2.jpg

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Chemist
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"only releasing it 3 hours later"

Photons interact STRONGLY with matter - that slows them down - that's why light travels slower than c in matter

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Chemist
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"And since established theory forbids superluminal travel"

AFAIK it only forbids superluminal speeds* in a vacuum, but in anything else where light is traveling at less than c then these sort of effects (e.g. Cherenkov radiation) are seen.

* Yes, I know the theory only actually forbids reaching light speed not travelling faster

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Chemist
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"tunnel through the c barrier "

My understanding of tunneling is that it can ONLY occur if the energy barrier is finite. It then becomes a question of what that means for a FTL transition

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Chemist
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"ize and composition of a star 168,000 light years away "

Well try this - for our local star - on average it takes many,many years for a photon, once generated as a gamma ray, to escape from the sun due to the dense interactions in the core.

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Exoplanet ranking suggests INTERSTELLAR WAR imminent

Chemist
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It's more likely ...

they'll have already read HHGG and will turn up expecting Bournemouth ( or was it Eastbourne ?) to be 'one of the most exciting places in the galaxy'

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Superhero oil-burping algae will save the world

Chemist
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"Synthetic fuel is actually quite old"

Mostly made by hydrogenating coal !

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Samsung strokes big bulb that'll keep going for decades

Chemist
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I've just been in B&Q

and they had 50W equivalents on the shelf with 25 years printed on the packaging.

Mind I think they were @30GBP

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We're searching for life, Jim, but not as we know it

Chemist
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"It's about time boffins took this idea seriously."

There's no need to take this seriously - if life can evolve in such diverse conditions you'd basically have to look almost everywhere so why not leave it at that.

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SQUID calls 'virtual photons' into real existence

Chemist
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"Conservation laws are already gone #"

NONESENSE !

Particles created near black holes are effectively taking mass from the black hole which will eventually vanish ( if no matter replenishes the black hole ) This is exactly why micro black holes are thought to have a very short lifetime and hence if the LHC somehow managed to create any it wouldn't be a problem

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Chemist
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"Poor thing must be busting for the litter tray"

It might be or maybe not - you'll have to look

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Gov web boss: Our sites look like bleak council estates

Chemist
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It would be best ...

if they were standards compliant, clear and up-to-date - forget the eye-candy.

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Will Intel slay or flee fearsome Snapdragon Win 8 tab?

Chemist
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MOS Technology

The 6502 was mostly designed by a Motorola team but they moved to MOS when Motorola didn't want the design. THE Motorola 8-bit was the 6809

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Neutrinos still FASTER THAN LIGHT in second test

Chemist
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How many more times...

"Five hundred years ago, everybody knew the Earth was flat"

Almost everyone who THOUGHT about it didn't think it was flat. Most people weren't bothered either way. Sailors and anyone living near the coast knew if wasn't flat, ships would slowly 'sink' below the horizon and then come back

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Chemist
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"hat all the possible errors fell well short of 60 nanoseconds."

All the random errors. Doesn't say anything about systematic errors like the clocks and distances.

This latest experiment suggests that one possible systematic error is not the reason for the observed 'speed'

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Chemist
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Re : Is this really new?

That's because light interacts strongly with matter so takes some time to escape from the super nova whereas neutrinos don't so set off first at almost c.

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Chemist
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"Have they tried firing them in the opposite direction"

I don't think anyone wants to build another CERN accelerator in Italy unless it's absolutely necessary.

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Enormous orbiting solar raygun power plants touted

Chemist
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Re :"What about the poles? "

The apparent rotation of the earth would be zero as the satellite is intended for geostationary orbit.

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Chemist
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@Error Message

It's intended for geostationary - in any case how else would it be able to point at a receiver array ?

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Chemist
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@Tomato42

I make it ~0.9c but I take your point. It does point out the difficulty ( I mean impossibilty ) of fuelling any type of ship intended for such speeds. Any fuel mass just becomes more mass to accelerate .... recurses !

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LHC results may solve riddle of how universe can exist

Chemist
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"Do we *know* that matter...... "

Well of course we do - Dan Brown cleared that up years ago

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Google flings Bing into search engine bin

Chemist
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"But I'm curious to know..."

Bookmarks

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Fusion boffins crack shreddy eddy plasma puzzle

Chemist
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"but hoping this isn't a sham.."

It is

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Toyota, Intel connect to connect cars to web

Chemist
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"reboot 14 times"

Nah, mine will run Linux

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Mars, Moon, solar system could be littered with alien artifacts

Chemist
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Headmaster

@NomNomNom

As I said "it's still one very large number ( of targets) of which we are 1."

I assumed they may well send multiple probes it's just that the number of 'local targets' is enormous. I think probes doing 'grand tours' is rather far-fetched and in any case would take a long, long time.

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