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goodies from the iceland

No - I've never been an academic. I did my first degree in electronics and then a doctorate in laser physics. But my career was first in professional consultancies and then in industry (including 7 years at Oxford Instruments - which is why we live here). And for the last 20 years as a self employed technology and business/management consultant. In fairness in my mid 20's I applied for a "new blood" lectureship at St Andrews University in Scotland. That was the strangest interview I have ever had, and decided academia was not a good fit for me (from my perspective didn't pay nearly enough, no prospects etc), and we parted company. Plus the clowns approached the CEO of the tiny 20 person company I worked for, for a reference without asking me first. So had I not left anyway to join PA Technology my career there would have been blighted. I did have a five year foray back into an academic environment in recent years, but as a self-employed large project manager. What particularly surprised and dismayed me is what a political and backbiting environment it is, particularly at a senior professorial level. Everyone watches their backs pretty much continuously, jockeying for position. I'd have hated that aspect of university life.

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Have we decided on a case for the mini? I'm thinking we could just use FPE for the whole thing. There was over 100 boards ordered so the price should be somewhat affordable at that quantity and we could make all the sides of the case work to our benefit with vents and such plus it would look awesome too.

Korean squid

I run my mini Dynalo at +/-20 volts. AMB voltage regulators, positive 10K and 133K, negative 10k and 160K resistors.

F..k Dusty, sorry to hear that. MY sinuses got sucked out by medical prosedure twice 10 years ago. I was literally crying cuz of the enduring pain. Is your sinus infecton chronic? Does it happen every year at winter? That sucking out the discharge with pus completely ceases the headaches. Get well sir.

RIP Dr. Heimlich. Rip Zsa Zsa. Hey guys, sorry I'm not posting so much. I just saw the posts about Ambassador assassination. The guy who shot Ambassador was a member of anti-riot force. More importantly he was a soldier of FETÖ. (The illegal organization of Fetullah Gulen). In his apartment, Fetullah Gulen and El-Kaide books has been found. Shooting order most probably came from Fetullah directly. With this info, it looks like it was an act can be considered of Radical Islamic Terrorism, but its partly true. Fetullah Gulen became an idiot who thinks himself is a ressurected Jesus (Mehdi in islamic culture). But also the organization became something like fucking huge mafia organization. Think him as Pablo Escobar became global. Under His command shitload of people assassinated (Hrant Dink and Necip Hablemitoğlu and I believe Tahir Elçi assassinated by them), murdered and convicted because of that fucker. Tayyip and him were pretty close till 17 December 2015 so they were fucking up Turkey, neighbours and their people together. They are still fucking up together even as enemies of each other. Cuz of that conflict between these old friends, shitload of innocent people already died. And another side of the medallion: Russia shouldn't care who assassinate their Ambassador. A high ranking officer of a Russian Government commended to Turkish Governent shot down by a lunatic. This is on Turkish Government, how the fuck you fail to guard him?! You know what upsets me more than anything, besides him being a human, he was a decent one. He worked his ass off to make things better between Russia And Turkey after latest conflict between them. RIP Andrey Karlov.

we're all coming over...

I would be in on that group buy. Me

Non Goat related this time ... Free Audible Audiobook https://slickdeals.net/f/9563216-born-a-crime-stories-from-a-south-african-childhood-by-trevor-noah-free-audible-audio-book Claimed, and gave me a free 30 day trail + 1 credit for another book. Ideal for those holiday road trips !

And that is absolutely correct. After 20 years I'd forgotten how a darned dilution fridge worked. I said " The hotter atoms of helium 4 diffuse upwards into the helium 3 (no viscosity, remember), and a truly impressive pump attached to the mixing chamber sucks these hotter helium 4 atoms out. That shifts the equilibrium point, and the next hottest helium 4 diffuses upwards, etc etc " Which is the wrong way round. Of course, the He3 sets up a concentration in the He4, and you pump the on the He4 side to reduce the equilibrium 6% of He3. The He3 moves very easily through the He4 because of its superfluidity. The downward evaporation of more thermally excited He3 into He4 is the cooling mechanism. The guy in the video describes it very well - thanks for posting it.

RIP the maneuver man - who lived to a ripe old age, and contributed greatly. Not a lot of people end up with a life saving technique named after them.

actually my price for a gallon of liquid N2 is $1.60 a gallon of milk is about $4

Kevin Gilmore was at Tavsanli/Kütahya/Turkey: The name of the product starts with KG, and at the bottom it says: "Danger, High Voltage" No doubt it was made by Dr. Gilmore.

That was interesting. For seven years in the '90's I ran engineering at Oxford Instruments, and apart from some outrageously complicated superconducting magnets, we pretty much had the world market in dilution refrigerators. These are the leaping-off point for many techniques to get even colder, using processes like adiabatic demagnetization. Anyhow, the dilution fridge works by a really strange quantum mechanical effect using a mixture of regular helium 4 and a lighter isotope of helium 3. As with all these cooling processes (brought out in the video) it is multi-stage using a series of heat exchangers until at the bottom of the machine is a mixing chamber less than the size of an ice hockey puck. In this the helium 4 becomes a superfluid and sits at the bottom, and helium 3 floats on top and has the viscosity of corn oil. The hotter atoms of helium 4 diffuse upwards into the helium 3 (no viscosity, remember), and a truly impressive pump attached to the mixing chamber sucks these hotter helium 4 atoms out. That shifts the equilibrium point, and the next hottest helium 4 diffuses upwards, etc etc. We designed and shipped products using this process to labs around the world - about 1 per week - which produced a base temperature somewhere between 1 and 3 milli-Kelvin. A long way above pico-Kelvin sure. But the race for ever colder temperatures all starts off with a dilution fridge - other than the Bose-Einstein crew, which use a different cooling process altogether. Anyhow, here is the business end of a dilution fridge. The thing at the bottom is the mixing chamber, the disc-like things are a series of counter-flow heat exchangers filled with sintered silver, and the copper coil has a capillary inside and is the next highest temperature. Not shown is something above all that called the "1K pot" which is what is says on the tin - so everything in that image sits at less than 1 Kelvin, and getting colder as you go towards the bottom of the image until 1 milli-K in the mixing chamber.

Was: Underworld, Everything Everything Is: Underworld, Barbara Barbara

Clearly worth twice that!!!