* Posts by Chemist

2542 posts • joined 24 Mar 2010

Linux Mint-using terror nerd awaits sentence for training Islamic State

Chemist
Silver badge

"Finally, recognition that terrorists wear suits."

No - he just wears a tie ! (Hopefully a very long and wide tie )

1
0

Give 'bots a chance: Driverless cars to be trialled between London and Oxford

Chemist
Silver badge

Re: There's a great deal

"Fast breeder reactors that use uranium are, by all intents and purposes, renewable"

But I don't suppose any were generating electricity on the day in question

0
0
Chemist
Silver badge

Re: There's a great deal

"UK powered by renewables alone for 24hrs"

Can you give a ref. to this ?? I know we managed without coal for 24hrs. but we do have plenty of natural gas stations - it also depends on whether you call nuclear 'renewable'.

0
0

Microsoft promises twice-yearly Windows 10, O365 updates – with just 18 months' support

Chemist
Silver badge

Re: Anybody else?

"It's just impossible to support all of Linux in a way that doesn't require the end user to be prepared to do a lot of command line administration."

Sorry, but that's not not my experience. I install OpenSUSE every year or two as a new release come out, administer it with the GUI tools and it just works. I also have a lot of Raspberry Pis networked together - now they are a more work due to the lighter weight desktops and the more experimental uses I put them to but still most admin. is done with the GUI tools.

0
0
Chemist
Silver badge

Re: Dear gods...

"But Linux falls apart the moment you need to support anything ever-so-slightly non-standard."

Basically that is nonsense. I've used it since ~ the beginning and it as only got better. I used it professionally from ~2000 until I retired for all manner of scientific computing running software at ~100% cpu for days at a time, and the graphics workstation I was using was still usable and responsive. It never crashed Some software did ( it was often edgy stuff) but the core system never did. We tried porting some of our in-house software to W2000 which was the company system at the time and it fell over all the time. I've not used Windows since ~2008 and I certainly don't miss it. I also never have experienced problems with LibreOffice - I get lots of Word/Excel/LO files from other scientists and don't seem to have any problems. All my other interests - video editing, RAW photo development, electronics are covered by adequate to wonderful programs. Others maybe will have a problem with one or more areas, but IMO Linux is the OS of choice for "anything ever-so-slightly non-standard" esp. with the vast range of compilers, libraries etc.

1
0
Chemist
Silver badge

Re: Twice yearly roll out of incompatabilities

"How about change details of the SMB protocol and thus mounting of SMB shares no longer works."

Well it might give you problems IF you use SMB but it won't actually break Linux

0
0
Chemist
Silver badge

Re: Twice yearly roll out of incompatabilities

"start to roll out code that breaks other systems; be they those who are still running old versions of Microsoft Windows (ie not 10) or those who run non Microsoft operating systems or applications. Eg Linux "

Eh ? (Please explain how they're going to break Linux)

2
0

Oh snap! UK Prime Minister Theresa May calls June election

Chemist
Silver badge

"It would save 50k/year * 650mps - £3,250,000 - ie: bugger all."

Well it would actually save £32 million but I take your point

3
0

Far out: Dark matter bridges millions of light-years long spotted between galaxies

Chemist
Silver badge

Re: Neurons, to me

"Don't say that out loud around the mice! If they know you have the answer they may stop the program."

The mice knew the answer - they didn't know the question !

(Thanks Douglas)

0
0
Chemist
Silver badge

Re: The assumption that it's matter

"Since matter is associated with gravity,"

BTW although this is often stated, in the Einstein field equations it's actually mass & energy that 'bends' spacetime AFAIK

8
0

'Tech troll' sues EFF to silence 'Stupid Patent of the Month' blog. Now the EFF sues back

Chemist
Silver badge

Re: Personal opinion

"If you patent something, i think they should give you a period of time to implement it into your own working products. If you just patent something without the intent to use the design yourself,"

In most sensible countries you can't patent an idea, you have to reduce it to a real example. With a new drug for example you need to describe how to synthesise it, describe some factual data such as melting point, NMR spectrum, mass spec. etc. Describe its use, advantage, biological data and alternative routes to synthesise it AND give sufficient examples of the synthesis of similar molecules along with the data above to show that the area has been evaluated. (My largest patent topped-out at ~100 examples which was a year's work and took weeks just to write)

On the other hand it was easy to spot patents (usually American I'm afraid) where almost all examples had been 'synthesised' on paper and had very broad classification for biological activity e.g. +, ++, +++, inactive. Patent offices vary widely in how much detail they require and how often they challenge the claims & detail in the application

12
0

Back to the future: Honda's new electric car can go an incredible 80 miles!

Chemist
Silver badge

Re: Hydrogen fuel cells

"The energy required to make it, i.e. separate it from the oxygen in water, is the energy that's stored in it as a fuel to be recombined with oxygen so this aspect doesn't really matter."

If only this were so. There are inefficiencies in the process - esp. electrolysis where ( from memory only ~~50%-70%) of the input energy produces hydrogen. When combined with the need to compress or liquify the gas it looks pretty dire. As someone mentioned above making hydrogen from natural gas is the usual route but necessarily produces carbon dioxide from a finite resource

People have mentioned "better catalysts" for the electrolysis process but catalysts only change the kinetics of a reaction NOT the thermodynamics.

Now I'm fairly sure the long-term future of transport is going to have to include electricity either directly or as a source of energy for synthesis of a fuel but the thermodynamic requirements will always need to be met.

6
0
Chemist
Silver badge

Re: Hydrogen fuel cells

"The only thing stopping it is finding a super efficient novel method for separating those lovely H atoms from the O in water. "

Thermodynamics !. No matter how efficient (and it isn't at the moment) there is a fixed energy required to do it of ~280kJ/mol. There is also an energy cost in either compressing it or liquifying it.

20
0

How hard will it be to measure Planet Nine?

Chemist
Silver badge

Re: " it would mass about ten times more than Earth"

"Weigh is way better, but not whey. Too cheesy."

Weigh is certainly a verb but definitely NOT the correct word to use in this context. Mass is the correct noun and so the construct should be .... .it would have a mass about ten times more than Earth

5
0

How Ford has slammed the door on Silicon Valley's autonomous vehicles drive

Chemist
Silver badge

Re: ... start your vehicle and warm it up from inside the house on a cold day...

"@Mage, your own link (correctly) says CO2 is not toxic."

You might like to read the rest of the paragraph !

"Concentrations of 7% to 10% (70,000 to 100,000 ppm) may cause suffocation, even in the presence of sufficient oxygen, manifesting as dizziness, headache, visual and hearing dysfunction, and unconsciousness within a few minutes to an hour.[98] The physiological effects of acute carbon dioxide exposure are grouped together under the term hypercapnia, a subset of asphyxiation."

0
1
Chemist
Silver badge

Re: ... start your vehicle and warm it up from inside the house on a cold day...

"Before or after you die of a lack of oxygen?"

As has been mentioned carbon dioxide will kill you quite effectively at modest concentrations. Many years ago I wrote one of our laboratory safety regulations banning people from moving solid carbon dioxide ( a common coolant in labs) by lift.

0
1

DNA-bothering eggheads brew beer you were literally born to like

Chemist
Silver badge

As a lifelong scientist ...

I prefer an experimental approach to this, ah, problem

16
0

Large Hadron Collider turns up five new particles

Chemist
Silver badge

Re: Say what?

"Of course the electron is critical for all sorts of technology today and more uses will come every decade"

The electron, involved in all chemistry and hence life and numerous other things like lightning from (almost) the dawn of time. I think J J Thompson was referring to new applications

0
0
Chemist
Silver badge

Re: Puzzled, as usual

"Really going back in time??? I have no idea,"

Must be that all the positrons are going back to the "Big Bang Burger Bar", whilst the electrons (heading forwards in time ) are saving their pennies for a night-out at the "Restaurant at the End of the Universe"

Thanks Douglas

1
0

Microsoft kills Windows Vista on April 11: No security patches, no hot fixes, no support, nada

Chemist
Silver badge

Re: I look back at it fondly.

"I think one good thing from Vista is that it changed desktop Linux from being mostly an unpolished hobbyist OS to a viable competitor to Windows"

Linux distros had been a perfectly usable, stable and fast desktop OS long before Vista. I'd been using it for years before that ( including professionally) About ~2005 I built a dual core AMD 64 bit system running OpenSUSE 11.? . and that's still going now running Leap 42.2

2
0

This is where UK's Navy will park its 75,000-ton aircraft carriers

Chemist
Silver badge

@ nick_rampart

" inanimate carbon rods"

Do you mean :

1) Animate carbon bods or

2) Inanimate carbon steel rods ?

(Seems in any case a lot of trouble to go to to rise/fall an "inch or two" especially as the tidal range in the harbour is ~~ 4 metres)

6
0

Linus Torvalds lashes devs who 'screw all the rules and processes' and send him 'crap'

Chemist
Silver badge

Re: No excuse

"Have you managed to get stable WiFi on your Pi? I have a couple old A-model ones here and I have yet to find a USB WiFi adapter that will stay up for more than a few days at a time."

Well most are Pi3s with built-in WiFi which have no problems but 1 Pi2 has a USB Ralink Technology, Corp. RT5370 Wireless Adapter which as been running continuously for ~ 150 days without a prob.

(Just had one of those phone calls, funny accent from "Windows Repair Centre". "Please press Windows key and .... well I wasn't listening really just grunting and saying 'Yeh' etc. Described the desktop - which was mostly blank - he eventually twigged it wasn't a Windows machine so accused me of lying about the Windows key 'because you have a Mac'. Needless to say it was the PI I'd setup for my wife. Well it amused my and wasted 10 minutes of his time...)

6
0
Chemist
Silver badge

Re: No excuse

"I'm getting a Raspberry Pi soon so I can also test on that."

As a little footnote to all the people claiming as usual that LInux is flaky, difficult, cli driven - I've just set a Pi up as a temp. measure after my wife's laptop died after she spilt water all over it . She wanted access to the laserprinter which lives on my file-server. So I installed the GUI printer controller from the (GUI) synaptic software installer and when I clicked on it it had found the printer and was all set to go. That was even easier than on the laptop (OpenSUSE 13.2)

7
1

Li-ion king Goodenough creates battery he says really is... good enough

Chemist
Silver badge

"Sodium is sodium. It does catch fire in contact with water."

It's also highly flammable ( and hard to extinguish) in air given a modest ignition source

In answer to another in this thread - sodium ions : I don't think so - where would the high energy density come from ?

0
0

Frustrated by reboot-happy Windows 10? Creators Update hopes to take away the pain

Chemist
Silver badge

Re: Linux kernel changes

"The fact that it doesn't automatically reboot just means you _might_ be running an insecure kernel from that point on if the kernel update concerned security."

OTOH the better distros do tell you to reboot when necessary.

5
0

BBC admits iPlayer downloads are broken

Chemist
Silver badge

Re: Remove! Flash! Everywhere! on! your! site! Now!

"Calm down Hans 1 - Just uninstall Flash."

I have a couple of sites I use that need Flash, but I do have it set up to ask for permission. On the BBC sites I generally find that ignoring the request to authorize Flash now automatically starts the html5 version.

5
0
Chemist
Silver badge

Re: Thank god get_iplayer still works fine, and is not limited to the "approved" platforms

After using get_iplayer for years I finally built a KDialog GUI box (started from an icon) that you can paste the pid number from the iplayer program page into, that then kicks off a bit of c that sends a request to a Pi that does the download. Works really well and the Pi downloads to a pendrive so I can easily pull it and take it away

The embedded KDialog line is : X=`kdialog --inputbox PID?` ; /home/bin/gip $X where gip is the c program that requests the pasted pid from the Pi daemon

You could, of course, just pass the pid from the dialogue to a script downloading the programme to the local machine

0
0

Two words, Mozilla: SPEED! NOW! Quit fiddling and get serious

Chemist
Silver badge

Re: The long term plan

"FF regularly crashed for me, much like their Thunderbird mail program does. "

Thunderbird crashes every week or so for me but I repeat FF never does. I believe you that it does for you - what's needed is to understand why the difference as I've written previously in this thread.

Memory, OS etc

I don't get juddery scrolls either

0
0
Chemist
Silver badge

Re: The long term plan

"Oh, this happens to me all the bloody time"

Can we have a little more detail. Fast/slow hardware, memory in use at the time, OS

As I've mentioned further back I don't see this problem at all even using slow machines, a Pi via VNC, various VMs . Some are slow to open a new tab but the typing all goes to the correct spot without missing anything

1
0
Chemist
Silver badge

Re: The long term plan

"I'll try it later on a 2GB 2-core AMD from ~2004"

Still no problem and that's running the latest OpenSUSE Leap42.2. Not quickly but still no issue with Ctl-T......

I've read most of this topic and I have to say I don't recognise many/most problems at all. For example FF never crashes (and this i7 laptop is only rebooted every couple of months), it uses quite a lot of memory (~1.5GB) on occasion but regularly reclaims it.

Something is wrong, something that is ideosycratic. No idea what but the fact that we can have a large range of behaviors suggests a rather complex problem.

I believe most people when they say they have a problem - I just don't have anything much myself.

0
0
Chemist
Silver badge

Re: The long term plan

"It may have to do with what's in those tabs. "

It may indeed but it's not an easy call. I'm not running a script blocker at the moment because I've been using some booking sites that behave very badly from past experience.

To add a little more I've just run FF ESR via VNC on a Pi and that still opens a new tab etc. without issues and I'd be the first to admit it's not snappy in general. The BBC News website takes quite a while to load and this particular Pi is on an ethernet connection.

All very odd

0
0
Chemist
Silver badge

Re: The long term plan

"Try it with a reasonanle number of tabs open."

Well I've got ~20 open at the moment. Firefox is using ~1.4GB at the mo'. This i7 laptop has 8GB and no SSD . Apart from a few filemanagers/editors and some ssh sessions/remote X progs. I'm not running anything too heavy at the moment.

I've just loaded up Google Earth, a RAW photoeditor, and 2 VMs. There is now ~900MB free, 1.4 GB swap and FF is now more sluggish but Ctl-T is still opening a new tab with the cursor in the address box and all I've typed appearing OK.

I'll try it later on a 2GB 2-core AMD from ~2004

3
0
Chemist
Silver badge

Re: The long term plan

"With Firefox, you type <ctrl>-T rm_or_address.... oh .... it's bloody Fiorefox again."

Genuine inquiry as this doesn't happen to me.

Ctl-T opens a new tab with the cursor in the address box. It happens so quickly that I can't type anything after the Ctl-T that doesn't appear in the box. Mind I'm using a pretty quick laptop (i7)

Firefox 50.1.0, OpenSUSE 13.2

Also I don't lose UI settings during updates.

1
0

As Microsoft touts Windows Insider for biz, let's take a look at W10's broken 2FA logins

Chemist
Silver badge

Re: "But nobody seems to use the right OS for the job"

"An MRI scanner may have used Windows because developing an UI in Linux back then could have been a real pain in the ass"

Well it's years since I did any lab work (~2000) but at the time our robotic mass-spectrometer and superconducting NMR machines all ran on Solaris complete with pretty GUI.

A couple of years later we were taking delivery of Dell workstations (replacing SG) to do computational chemistry, protein modelling and 3D graphics( liquid xtal spectacles) and yes they all ran Red Hat/Gnome and even our in-house programmer was producing high quality GUI software. We tried porting some stuff to W2000 but it generally broke, usually in the night or over the weekend - some of the protein modelling software ran at ~100% CPU on the dual Xeons for days/weeks even.

3
0

Munich may dump Linux for Windows

Chemist
Silver badge

Re: The thing about Linux Desktop

"Far as I know, the "default" KDE Plasma 5 log-in manager (sddm)..."

Well I'm using OpenSUSE Leap 42.2 with Plasma5 and sddm and I've not had any probs. Most of the issues in the first post you quote look like mis-config, mis-understanding ....

2
0
Chemist
Silver badge

Re: The thing about Linux Desktop

"I can also add, one of the problems with KDE Plasma 5 is that they didn't even bother to include a log-in manager as they did with older versions of KDE."

Does not compute !!!

(Funny, I seem to have to log-in to a manager)

3
0
Chemist
Silver badge

Re: The company I work for went through this

"Every fecking time someone comes up with these fictional anecdotes."

Why do you imagine that they're fictional ??

I don't expect you to believe it but I've certainly set my (80 year old) mother-in-law with an OpenSUSE setup after WindowsXP committed suicide during an update. She had no problem at all. Firefox for the web, Thunderbird for e-mail, LibreOffice for wp. All she needed really, scanning & printing no problem. Automatic updates. I did install well-protected SSH access for remote sorting of problems but never needed to use it.

As I say : why do you imagine that they're fictional ??

4
0
Chemist
Silver badge

Re: it's not Linux, it's Office

"even indentation icons are hidden on LO vs. plain obvious in MS O."

On my copies (uncustomized) they are present

(Version: 5.0.6.3, Version: 4.3.3.2, Version 4.1.6.2, Version 5.2.3.3, Version 3.5.42, Version 4.4.3.2)

7
0

Netherlands reverts to hand-counted votes to quell security fears

Chemist
Silver badge

Re: I am for pen and paper!

" Australia has the right approach) of personal attendance at polling stations"

So anyone temporarily out of the country, in hospital etc. doesn't get a vote ?

0
0

Stanford boffins find 'correlation between caffeine consumption and longevity'

Chemist
Silver badge

Re: confused

""substances found within caffeine" doesn't make any sense"

It does not ! However they may have meant coffee. Caffeine is not that complex BTW

The phrase 'substances found within caffeine' has no chemical meaning. Caffeine is a pure chemical entity.

1
0

Now for a really cool micro-drum solo: Boffins chill gizmo below quantum limit

Chemist
Silver badge

Re: Very

" If we cool down to the point that all the energy is removed,"

To reiterate : cooling to ~0K has no connection with removing all energy. Even at 0K chemical bonds will still be present let alone the nuclear forces .etc. Electrons will still be in their orbitals This a non-question !

0
0
Chemist
Silver badge

Re: Very

"One of the possibilities is that the level of energy is so low as to break down the forces holding particles together"

What ? Ref ?

0
0
Chemist
Silver badge

Re: Very

"when we take all of the energy out of matter at absolute zero"

They're not taking all of the energy out - only the vibrational/rotational/translational AFAIK

3
0

Puny galaxy packs a big punch: A gazillion joules' worth of radio bursts

Chemist
Silver badge

Re: That is big

Need to check this but I'd reckon that energy is equivalent to the relativistic kinetic energy of a ~~100 million tonnes traveling within a cat's whisker of c

0
1

Twas the week before Xmas ... not a creature was stirring – except Microsoft admitting its Windows 10 upgrade pop-up went 'too far'

Chemist
Silver badge
Joke

Re: M$ Long History

"Lets ask a Gentoo user!"

Yes, let's ask him/her !

To whom it may concern. I've used Linux since ~ the beginning. I use it all the time & nothing else since ~2006. I compile lots of stuff but the last time I compiled a kernel was ~~1997 and even that was a matter of ticking boxes and pressing the 'go' button.

5
1
Chemist
Silver badge

Re: M$ Long History

" which doesn't require its users to bugger about compiling their own drivers and the like at the time"

That'd be Linux then ! Seriously how many users have compiled anything to get a fully-functioning system ?

13
1

Chinese boffins: We're testing an 'impossible' EM Drive IN SPAAAACE

Chemist
Silver badge

Re: Nothing but the universe comes for free

"photon rest mass is tiny,"

Photon rest mass is zero !

2
0

Banks 'not doing enough' to protect against bank-transfer scams

Chemist
Silver badge

"Banks could simply require 2FA and it would put a huge dent in the problem. That's on the banks."

ALL my banks (3) do require such. All are sufficiently onerous that I don't set-up a new transfer lightly

1
0
Chemist
Silver badge

Re: Don't blame the bank

"have advanced knowledge of a much more intricate system than physical chemistry, "

What !!!!!!

3
1

Microsoft quietly emits patch to undo its earlier patch that broke Windows 10 networking

Chemist
Silver badge

Re: supporting my elderly father with his windows 10 machine

"Having worked in IT for 20 years I know no one outside of work with a MAC"

You should get out more. I don't use Mac or Windows but I know 5 or 6 at least with a desktop or laptop.

5
2

Forums

Biting the hand that feeds IT © 1998–2017