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* Posts by Chemist

1913 posts • joined 24 Mar 2010

It's even GRIMMER up North after MEGA SKY BROADBAND OUTAGE

Chemist
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Re: Well..

"Saas Fee. Dullest ski holiday i've ever been on. (FYI)"

Well I don't ski but I do walk/climb. If I did ski I could do it at the moment - many of the main ski teams are here including Japanese. The Swiss team has >18 minibuses.

I can't see the runs at the moment as there is some cloud ( it snowed last night down to ~3000m )

http://www.saas-fee.ch/en/aktuell/Webcam_Mittelallalin

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Chemist
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Well..

I live in the a very nice part of 'the north' surrounded by many of the areas you attempt to mention although I'm in Saas-Fee, Switzerland at the moment. Certainly my broadband connection is working at home as I've just looked at a directory on my server using fish://

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Microsoft, Docker bid to bring Linux-y containers to Windows: What YOU need to know

Chemist
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Re: It's sounding a bit vague

"Yes, I feel they're at the stage of: "Oh, I want one of those!""

or even " "Oh, I want you to think we've got one of those!""

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Scientists skeptical of Lockheed Martin's truck-sized FUSION reactor breakthrough boast

Chemist
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Re: Clean ?????

"You need a process that creates helium-6 for it to be clean,"

Would you care to elaborate on this ?

AFAIK He-6 has a 1/2 life of <1 sec and decays by both beta and alpha emission.

He-4 is stable and the extra neutron released to form it is the one required to make more Tritium

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Chemist
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Re: Patents

"Isn't half life affected by relativistic effects?"

Sorry, don't understand the context ?

Tritium has a half-life of ~12 years, it's often incorporated into drugs/ligands for studying biological mechanisms and these have a useful working life.

If you send it up to close to the speed of light it's 1/2 life will increase to multiples of 12 years depending on the velocity but I don't know what that's got to do with this topic.

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Kill off SSL 3.0 NOW: HTTPS savaged by vicious POODLE

Chemist
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Re: smug

"Poodletest doesn't get it right with Firefox - it is vulnerable."

It does now - it's been updated.

Also "So in short: Firefox is less likely to downgrade to SSLv3 if the server follows best practices on cipher selection, even if SSLv3 is still supported."

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Chemist
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From ISC

Their current page for this includes links to test sites

For clients it's https://www.poodletest.com/ (Javascript needs to be enabled)

FYI OpenSUSE 13.1 Firefox ESR not vulnerable, SeaMonkey (2.29) not vulnerable, Konqueror (4.10.1) vulnerable

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Lies, damn pies and obesity statistics: We're NOT a nation of fatties

Chemist
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Re: Hunter gatherer much

"Hunter gatherer much "

Summarizing what I've researched about this aspect of diet/behaviour :

Humans still have the basic physiology of hunter-gatherers from 10000+ years ago. It's estimated ( from the nearest we have to hunter gatherers today) that they expended ~~1400 cals average in physical activity every day as well as having a relatively low-calorie diet especially low in simple sugars.

Our metabolism, although wonderfully adaptable, still probably reflects this.

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Chemist
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Re: Don't forget...

Not to mention the parts of the country fed by direct rainwater supplies. Also many of the contaminants people worry about (e.g. growth hormone) don't get absorbed orally.

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Chemist
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@V_Eight

"When quizzing the biologist she said that the calories burned maintaining body temp at the cellular level are next to nothing. Perhaps 100 a day."

I've no idea of the actual figure but AFAIK the bulk of heat generated in the body is the result of exothermic chemical reactions during metabolism - indeed this is why exercise makes you hot as glucose/fats are oxidized at an elevated rate to produce the high-energy phosphates that power muscles. Indeed any fat/glucose not consumed will be converted into storage forms such as lipid stores or muscle & liver glycogen. If the glycogen stores are full the excess glucose will be converted to fat.

BTW It may be obvious but burning 1kg of fat or glucose out in the open air generates the same amount of heat as metabolising it does.

There is some evidence that (some ?) humans have a brown fat that can short circuit the usual metabolic process and generate heat 'on demand' under hormonal or nervous system control. This is separate from the other thermogenic technique of shivering to generate an increased thermal input.

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Chemist
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"My doctor told me my blood pressure and other problems were exacerbated by my weight "

When I started to lose weight my blood pressure was 170/95 and I was determined to avoid medication if possible (ironic since a colleague and I developed the manufacturing route to one of the world's first $1Billion/year drugs for hypertension)

By the time I'd lost 15kg my blood pressure was 155/85 and by my target of 80kg it was 125/80. (Researching the literature in this area has led me to the conclusion that our heterogeneous human population has a very wide spread of BP/weight responses and it looks like I was one of the lucky ones)

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Chemist
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"Exercise is a good thing but as a way of losing weight it's problematic, we are very efficient at converting food to work and muscle."

No it's absolutely equivalent to dieting the difficulty is doing enough of it to lose a large amount quickly. As I mention earlier I lost 35kg by keeping my intake ~2300 cals and upping my exercise to quite a large amount - not possible for everyone I know. I now measure all exercise in calories which not only keeps the arithmetic simple but concentrates the mind wonderfully when about to eat almost anything - this meal needs 15 miles of walking to be calorie neutral.

BTW if we were very good at converting food to work and muscle a lot of people would be star weightlifters. What we are good at doing is storing excess energy as fat. Dieting depletes all body stores : glycogen, fat and lean tissue/muscle. That's another good reason not to lose weight just by dieting.

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Chemist
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Re: And now my turn,

"I'll know more after a week,"

Well done to get started.

A few points. A week is a very short time, body weight can change day to day quite a lot, in my case easily swamping a weeks loss. When I was losing 2-3 kg a week it didn't matter but at lower rates it's easy to be fooled and so disheartened. Best is to plot your weight every day at the same time/scales/position of scales. and then apply an exponential moving average to the plot. This tends to give an indicator of trend. Also when you first cut calories esp. dramatically several confounding trends occur such as fluid loss or retention and esp. a lowering of basal metabolic rate. You may feel cold. Regular exercise should help to boost/maintain your metabolic rate.

For breakfast and lunch I tended to stick to foods where the calories were easy to measure/estimate (cereal/milk, crispbreads/jam fruit).

Problem with most expenditure over basal is measuring/estimating it. You could use a pedometer but even the recommended 30mins brisk walking is only likely to be ~200 cals/day. 1 flight of stairs is only likely to be ~3 cals .

Good luck

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Chemist
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Re: As a fatter person

"sequestered in your adipocytes become unavailable for doing anything. "

Sorry fat makes an important contribution to exercise calories especial endurance. The reason for having adipocytes in any case is to be a longer-term store of energy. There'd be no point if the energy couldn't be used.

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Chemist
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Re: lies , damn lies, and who are all the pies?

"keeping your brain alive burns a big chunk of the 2500kCals/day"

Actually about 200-300 cals/day . There are many sources of ref. but this one should do :

http://www.scientificamerican.com/article/thinking-hard-calories/

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Chemist
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Re: Bollocks

"So am I a statistic"

It doesn't matter ( from just a weight point of view not other health issues) what you eat/drink - count the calories (honestly) in what you eat/drink and if they are over approx 2500 a day and probably quite a bit less if you have a sedentary job then you'll gain weight

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Chemist
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Re: A personal experience

"According to the BMI stuff, that still leaves me about a stone 'overweight'. I disagree."

As others have pointed out BMI is, at best, a 'rough' guide to individuals. It should act as a check - if it suggests you are overweight then look at other measures such as waist size or better still body-fat percentage - this is the real target - a fit individual should have plenty of muscle and a relatively small amount of fat. Unfortunately this is the hardest parameter to measure - most easy measures are poor surrogates for MRI scans.

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Chemist
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Re: OK I admit it

"thought about publishing the data somewhere? "

Oh, it's almost all available if you have good access to the the biomedical literature. The only thing I really struggled with is the value for height gain as there seems to be a wide range in the literature. My final value of 100 cals/100m gain+loss and matches my actual loss rather well.

Another interesting on-line source , esp to an IT audience, is a document by John Walker one of the Autocad founders although he lost weight mostly by calorie reduction.

The Hacker's Diet

How to lose weight and hair through stress and poor nutrition

By John Walker

http://www.fourmilab.ch/hackdiet/

Unfortunately I'd worked out my routine and lost a lot of weight before I found this.

"coming in from a 2.5km run and eating 3 slices of toast and honey - vastly more calories than I have theoretically burned."

You can't treat it like that. You need to know at the minimum how many calories/day will keep your weight steady. Is the toast etc in addition to that basal calorie level. There really is no magic in this for most people long term unless you are one of the 'lucky' ones with lots of brown fat (assuming it really exists/works in humans) or some metabolic issue ( malabsorption of fats for example)

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Chemist
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OK I admit it

In 1997 I weighed 115kg @ 1.8m tall. I decided that enough was enough especially as mountain climbing was getting rather hard

I curtailed my diet to ~2300 cals per day (estimate) and began increasing my exercise. Now not everyone can do it but I live in hilly country and I worked in the country so by walking and eventually running before breakfast, walking at lunch and in the evenings I managed to exercise the equivalent of 500-2000 cals per day. It took 4 years losing some every spring/summer & gaining some over winter.

I still have the spreadsheets going back to then and I carried on until I reached ~80kg which I've maintained ever since.

The equation was actually simple (Estimated calories consumed minus required calorie intake for neutral weight gain minus exercise calories)/8000 = weight loss per day in kg.

The hard part was estimating intake, working out neutral calories for me and estimating various forms of exercise although most (running, cycling ) are available. The hard one in fact was hill walking which I do a lot. My best estimate was 60 cals/km + 100 cals per 100 metres ascent+descent. This may not be all strictly accurate but my weight loss tracked my equation almost perfectly sometimes spookily so.

The 8000 in the equation is cals/kg of fat BTW. The above equation needs to be adjusted for body weight as lowering weight decreases the numerical effects of exercise - if you want to lose 3kg it matters not but in my case it was 35kg or ~40% of my final weight. I still have no feedback when I overeat I have to rely on estimates and scales but now it's become second nature and I can keep my weight ± 2kg.

I have no pride in what I did I'm very sorry it was necessary but I think the message is for most ( probably nearly all people) too many calories need to be compensated for by starvation or preferably exercise. Many people I've discovered have the same lack of feedback to excessive intake and many people have a wildly optimistic view of the effects of exercise. ( a small Mars bar is equivalent to 3-4 miles of walking, sadly a pint needs 2 miles of walking )

Another way of looking at it ; 100 cals extra/less exercise/food every day is equivalent to losing/gaining 4.5kg in a year. That easily goes to explain this 'epidemic'

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I've got a new Linux box, how does it work... WOAH, only asking :-/

Chemist
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"Bottom line is, by the time you get to recompiling your kernel to suit the hardware and get things going, Linux is an amazing platform for getting the most out"

You really expect that most people with any knowledge of Linux would believe this ?

I've not compiled a kernel for probably 15 years and I use Linux (OpenSUSE) all the time on all my machines.

Installs also automatically get the resolution of the monitors correct, even my TV plugged in as a second monitor is recognized.

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Trolls have DARK TETRAD of personality defects, say trickcyclists

Chemist
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"Not an IT department with a confusing name."

Correct, mea culpa - I read IS as IT !

Still stand by the post on that basis though

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Chemist
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"who does that?"

Well I can't tell you as they always post AC. But on many occasions they've claimed to be an IT director, or responsible for 25000 desktops or some such guff. The language is a dead giveaway, the phrases/claims almost always identical and repeated ad nauseam. I think Trevor probably knows who I mean.

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Chemist
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"than being out there and running an IS unit or similar?"

Or more likely, in the case of one of 'our' more prolific trolls, pretending to.

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Internet Explorer stars in monster October Patch Tuesday

Chemist
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"like the ability to turn off javascript,"

Really ??. What they've done is remove the option in Preferences - it's still an option on the about:config page that's used for masses of possible configuration changes

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Re-light my diode: Trio of boffins scoop physics Nobel for BLUE LEDs

Chemist
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"Did Marie Curie, just go oh look what's this funny metal, I'll call it Plutomium. No."

Bit pedantic I know, but it's Polonium ( and later Radium)

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Bored hackers flick Shellshock button to OFF as payloads shrink

Chemist
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Re: likewise

"f you think it's FUD to point out that bad things can happen when a simple to exploit vulnerability can get you a remote shell"

I don't think that's FUD. But as you gave no evidence about method it's your claim to be able to do it that is the FUD

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Chemist
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Re: likewise

"Reasonably straight forward, as long as you can find yourself a privilege escalation hole. I've demo'd exploits that allowed me to root boxes, using shellshock as the entry point. There was no misconfiguration on the systems, just other bugs which became exploitable once you were able to run code on the box"

Ooh, let's all believe the AC - no evidence given - trust him after all he's an AC

These were your own boxes I hope or are you going to turn yourself in ? Perhaps that's why you are AC.

If they were your boxes, or indeed any others, how do we know they were correctly configured ? Or is it all the wishful FUDing of an AC ?

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Vanished blog posts? Enterprise gaps? Welcome to Windows 10

Chemist
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Re: Bah!

"It will be a hassle because I use many, many, many, applications every day that do not appear as yet to have Linux versions"

So it's not a hassle - its an impossibility is what you should have said - if you can't manage without a certain program or programs you're stuffed.

Somehow I seem to have to have missed the need for anything I can't find for Linux, sure I've had to adjust but given all the scientific software I've used was generally written for Unix/Linux and that all my other interests ( photography, still and video, programming, electronics) can be well satisfied by programs available for Linux (plus all the usual requirements of browsers/e-mail clients/spreadsheets etc).

If you have a specific need (Autocad) for example then you have no real option, I guess.

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Chemist
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Re: Bah!

"I think this is the inflection point that makes Linux worth the hassle."

What hassle ? ( i7 laptop, CeleronM laptop, Atom netbook, dual-core Atom fileserver, dual core AMD desktop, dual Core Intel desktop) That's my current line-up in a LONG list back to 1995. All current machines using OpenSUSE 13.1

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Researchers bypass Redmond's EMET, again

Chemist
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"Yawn. Lots of assertions...."

You're generous ! Seems more like his usual bowel movements.

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Supercomputers: The Next Generation – Cray puts burst buffer tech, Intel Haswell inside

Chemist
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Happy

Re: I want one in my basement

"I want one in my basement - to calculate how to win the lottery...."

You have an algorithm ?

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What's a Chromebook good for? How about running PHOTOSHOP?

Chemist
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Re: @Chemist

"Why would you need an ARM version of Darktable?"

I was covering the general case - anyway someone might already have an ARM-based on

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Chemist
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"What an idiotic comment, of course your requirements mean this situation isn't ideal for you."

Who is it ideal for ? . Most people don't edit their photos much anyway- certainly not so as to need Photoshop and its costs. On the other hand many people with a DSLR have big files in huge archives AND do develop from raw images - so an on-line editor is not ideal for them either.

Typically on a 3 week trip I will take 200-600 photos ( ~~15GB) and 5GB of HD video clips. Even the network at home struggles a bit with that during editing.

BTW I'd put a Linux distro on the chromebook and use Darktable for editing (if an ARM version is available)

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Microsoft on the Threshold of a new name for Windows next week

Chemist
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Re: Next Windows name is.........

"(and believe me, I' have tried so many times)"

The considered opinion of an AC and for what good reason ?

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Italy's High Court orders HP to refund punter for putting Windows on PC

Chemist
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Re: If

"I bought a car and then decided I didn't like the engine, I wouldn't expect to be able to just pull the engine out and ask for some of my money back."

Agreed !. However if you were given the option you could choose. After all PCs are designed not to require 1 particular OS.

I have bought several laptops now without any OS - no probs.

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Hawking: Higgs boson in a BIG particle punisher could DESTROY UNIVERSE

Chemist
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Re: Intrigued

"how would one calculate the velocity needed for a grain of sand to destroy a planet?"

Easy-ish. Any sized grain of sand if it could reach c would have infinite energy. So just crank the speed control back just enough to have sufficient energy to destroy a planet.

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Fedora gets new partition manager

Chemist
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Re: Is there an option to have more than one partition?

"What distro is that?"

I've not had a problem like this for quite a while but from memory OpenSUSE, at least , reserves 5% of free disk space for root to give some working space for correcting any 'disk full' issues

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Chemist
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Re: Yeah that's what Linux was missing!

"The Linux fdisk utility is perfectly capable of handling bigger partitions than 2GB"

I think he means 2TB

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Like condoms, data now comes in big and HUGE sizes

Chemist
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Pint

Re: not like condoms, like beer

"as in gigabytes of data or pints of beer."

Would it be a tad greedy to ask for gigapints of beer ? (I'm not driving)

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Boffins attempt to prove the UNIVERSE IS JUST A HOLOGRAM

Chemist
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Re: Interesting times

"as if time would behave normally."

Indeed, but normal for a photon - photons don't experience time. You would still arrive at your destination instantly - your watch would not have ticked - that's normal for a photon. But, but you still can only do any of this if your rest mass is 0.

Sounds weird I know but that's the universe for you. As an object approaches c its 'clock' runs slower and slower - at c it stops. This photon if it was sentient would experience its entire trip from emission to absorption as a single composite image

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Chemist
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Re: Interesting times

"I try to imagine its "look and feel" while riding on a photon ! :-)"

Sorry to upset you but it'd be beyond a blur as a photon transits instantaneously over any distance from its perspective. It's travelling at light speed so doesn't experience time at all AFAIK.

(Of course hitching a ride on a photon will slow it down unless you too are massless so this isn't anything more than a thought experiment unless you've seriously been dieting )

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Rejoice, Windows fans: Stable 64-bit Chromium drops for Win 7 and 8

Chemist
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Re: In all the possible ways Mozilla are mindlessly following everything Googly...

" I'd wish they'ed lift up for both Linux, and Windows."

I don't know about Windows but Firefox has been 64-bit in the Linux distro I use for quite a while

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Sin COS to tan Windows? Chinese operating system to debut in autumn – report

Chemist
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Re: CAD/CAM for for Linux&*BSD

"same goes for Lightroom."

Well I use Darktable with my Canons (550D & 6D) and I'm very happy with it.

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Linux turns 23 and Linus Torvalds celebrates as only he can

Chemist
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Re: 23 Years @ P.Lee

AC - I think you are wanted more urgently on the forum about how crap Word is. Oh - I see you've been there.

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The Return of BSOD: Does ANYONE trust Microsoft patches?

Chemist
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Re: Stupid

"Or have I just been amazingly lucky for the last five years or so..."

~20 years in my case but I agree with your sentiments

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Oracle reveals 32-core, 10 BEEELLION-transistor SPARC M7

Chemist
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Re: Multi-core

"Multi-core is great for parallel tasks"

Bot when it works oh, yes. The quad-core i7 laptop I'm writing this on is bloody great with programs like ffmpeg which will transcode video with all 4(8) cores running at ~85-90% and still is responsive for less demanding jobs. Gets rather hot though !

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Japanese boffins invent 4.4 TREEELLION frames per second camera

Chemist
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Re: Astonishing.

"You're talking about watching atoms vibrate in a crystal."

Not with light you're not !

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Chemist
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Re: low resolution???

"VGA depth images from stereo are around 30fps on a workstation."

A little out of date we were using 45 fps at 1280x1024 in stereo 10 years ago. Mind the graphics card cost the same as the workstation.

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WinPhone's Halo hottie Cortana to hit desktop in next Windows – report

Chemist
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Re: Prior Art

"The standard Depository of all Earthly knowledge, and wisdom?"

Sorry that's just a sub-set. The guide entries were likely a homage to Asimov's Encyclopedia Galactica from the Foundation Trilogy ( that ended up as ~6 books too).

I think somewhere in HHGG it even mentions Encyclopedia Galactica - something like " ... in parts of the galaxy the HHGG has even replaced the Encyclopedia Galactica as the main source of knowledge"

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