We can do better
717 posts • joined 3 Sep 2012
a QC could be used to solve real QM problems, like calculating an optical spectrum from first principes.
At Uni many years ago I followed a lecture course on theoretical spectroscopy. We started with about 15 students in september and by Christmas that number had dropped to about four .... And that only concerned the hydrogen atom.
After you exhausted all the options and get in a loop: Press 1, 2 or 3 none of which include connect me to a person of flesh and blood, press 0. The answer will be We did not receive a valid number. Repreat this 4 (four) times and the answer wil change to You will now be connected to an operator, bleep, bleep, .... After another 15(!) minutes someone identifying himself as, say, Jesse will answer the phone.
Laika, the first mammal in orbit, was just an ordinary straydog picked from the streets of Moscow. Luckily for her she was euthanised is space. Sooner or later a space tourism 'mission' will fail and the tourists can collect their posthumous Darwin Awards (*).
BTW IMHO Posts on ElReg on manned spaceflight should not be categorised as SCIENCE.
(*) See this followup video.
In the Netherlands and probably elsewhere several front gardens are adorned with MIGs and other military aircraft.
Most are removed either because they still have machineguns (illegal) and/or conflict with municipal building regulations. https://www.rtvdrenthe.nl/nieuws/7417/MIG-Schoonloo-verkocht
BTW, If you want to admire an Oerlikon FLAK while you enjoy your meal and a beer, go to the Zeughauskeller Restaurant in Zürich.
a sodium cooled fast breeder nuclear reactor was commissioned in Germany, the SNR-300 in Kalkar. It was build at the cost of 4 billion USD, but never used. It is now a (profitable) themepark for kids.
BTW The Dutch protests against Kalkar gave Milieudefensie a boost. The same organisation that now successfully prosecuted Royal Dutch Shell as a global polluter.
If the sausage roll has a tail sticking out of it, do not eat it. Well, that depends on who's tail it is and how well the locals prepared it.
Delft Dynamics already developed their U-drone. An tethered underground drone for military reconnaissance. U-drone navigates with Australian SLAM (Simultaneous Location and Mapping) software.
The U-drone is one of the many products sponsored by the Dutch army.
One of Delft Dynamics' other products is a drone catcher. See the video.
AFAIR, the Electrologica X8 of the Utrecht University (happy memories) was also fed by a rotary converter. It allowed a save shutdown in case of a brown out.
Math students were allowed to run any pet program, as long as the execution time was 30 seconds or less (and did not use the plotter). Input was by paper tape, output on 132 column line printers. The turnaround time was one day, which made you check your code very carefully. Yes, my first program (Algol 60) succeeded at the first try.
The proposed laser ranging works only for satellites equiped with an intact retroreflector or f.i. large rocket boosters, not for your eh-em garden-variety of space junk. Most satellites do not have retroreflectors. They are not cars where a mirror is obligatory and when a satellite has one and is reduced to space junk by a collision, the mirrors are probably no longer aligned.
In 1947 the Soviet Union bought Rolls-Royce Derwent and Nene engines from the British and the Russians cloned them in their MiG-15 and La-15 jet fighters. Stalin had been skeptical that Britain would sell these engines. Stalin reportedly said "What kind of fool would be willing to sell his secrets!". But the British government agreed to the sale anyway.
Stalin and the Bomb, page 235.
Four supernovae (SNe), exploding 300 pc from Earth, were recorded 44, 37, 32, and 22 kyr ago in the radiocarbon (14C) record during the past 50 kyr. Each SN left a nearly identical signature in the record, beginning with an initial sudden increase in atmospheric radiocarbon, when the SN exploded, followed by a hiatus of 1500 yr, and concluding with a sustained 2000 yr increase in global radiocarbon due to gamma-rays produced by diffusive shock in the SN remnant (SNR). For the past 18 kyr excess radiocarbon has decayed with the 14C half-life.
SN22kyrBP, is identified as the Vela SN that exploded 250 ± 30 pc from Earth. These SNe are confirmed in the 10 Be, 26 Al, 36 Cl, and NO3- geologic records. The rate of near-Earth SNe is consistent with the observed rate of historical SNe.
See however the comment https://arxiv.org/pdf/1406.5141.
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