Posts by harmjschoonhoven 737 publicly visible posts • joined 3 Sep 2012
Indias annual military budget is 38.35 billion USD (FY 2014, nominal). Its (100% military) Defence Research and Development Organisation has a budget of 1600 million USD and India is estimated to have an arsenal of 90-110 nuclear weapons (SIPRI 2014).
Let them research the Mikheyev-Smirnov-Wolfenstein mechanism on a shoestring. Neutrinos are harmless, they zap the earth core unhindered.
@MartinC: The Sun rotates with 250 km/s (0.000833c) at a distance of 32000 lj around the galactic center. That is ½ arcsec/century. In the timespan of 20 years galactic rotation can be measured by careful observations, but not as a stereo effect in a pair of HST photos of M16.
So what you see is the internal dynamics of the Pillars of Creation.
Christopher R. Olson (Department of Behavioral Neuroscience, Oregon Health & Science University, 3181 SW Sam Jackson Park Road L470, Portland, Oregon, UNITED STATES of AMERICA 97239-3098) et al. wrote in their publication:
"In the presence of females, male zebra finches reliably produce female-directed song as part of their courtship behavior. ... The study design assigned adult male finches to alcohol or control drinking treatments."
and more interesting for our British readers:
"Body mass ... remained constant across phases for the birds that were provided alcohol.".
After his victorious battle at the Kleidion pass on 29 July 1014 the Byzantine emperor Basil II (976-1025) blinded about fifteen thousand bulgarian prisoners of war, with the orders that one man for each hundred be left one eye so he could be their guide. Blinding was much used at the time as the more Christian penalty because God-given life was not taken.
Switzerland is not a homogeneous country. Comparing The French speaking part of the Rhone valley west of Leuk with the German speaking part east of Leuk you will soon notice that in the western part the ladies are more elegantly dressed and in the eastern part the houses are better painted.
Besides color vision deficiencies, which affect some 8% of males, the appreciation of a colour is highly influenced by the surrounding colours. Here the Banana PI background goes astray. Near the triangle the (R,G,B) values are (210,210,0) - i.e. yellow. The brightness decreases in concentric circles without change in chromacity to (152,153,0).
The lack of colour (chromacity) contrast makes it hard to judge the colour.
The illuminated side of the Moon (not to be confused with the near side) is bombarded by the solar wind with 5-80 protons/cm³ at ~200000K. The velocity of sound in hydrogen plasma (not H2 gas) at 200000K is approx. 57 km/s.
So 3800 miles/hour is 0.033 in lunar Mach numbers.
Over the decennia I had many bad experiences with WD drives. But they make several series (colours) with different MTBFs. Their high-end drives are reliable. Also Toshiba* claims a long MTBF for their drives.
BTW AFAIK the the quality of spinning rust is mainly determined by the quality of the ball bearings: initial submicron differences in diameter of the spheres have just to wear off.
* Pronounce with the stress on 'i'.
All power consumed by computers from the 25W human brain to a 6.3 MW Cray XC40 is dissipated. This in contrast to chemical processes like Haber-Bosch ammoniasynthesis (good for 5% of global energy use) where a large part ends up in the product.
The installation of the HPC at the Exeter Science Park will influence the local climate which it is supposed to forecast.
Will this be the begnning of selfconscious computers?
My late father improved the efficiency of the family cars, notably several Panhard PL 17's, by adding a retour pipe for cooled exhaust gases to the low pressure air-fuel mixture, controlled by a hand-operated valve. The pressure being measured with a vacuum gauge.
Increasing the pressure (and temperature) in the cylinders gave a more complete combustion for a wide range of loads.
BTW Panhard's forced air cooled boxer engines are not unlike aircraft engines with one instead of two sparking plugs per cylinder.
The substantial problems with the stabiltity of a magnetised plasma decrease with increasing scale. There is a reason why ITER is the largest experiment for controlled nuclear fusion up to this day.
A mass of 2*10^30 kg hydrogen by itself is sufficient to initiate a stable fusion reaction and solve all our energy requirements.
The survey asked an equivalent of "If your car is stolen, what would be its value on the black market?".
Both stealing cars and using personal data for a purpose it was not intended for are punishable by law. In the later case f.i. CELEX:31995L0046 'Directive 95/46/EC of the European Parliament and of the Council of 24 October 1995 on the protection of individuals with regard to the processing of personal data and on the free movement of such data', Official Journal L 281 , 23/11/1995 P. 0031 - 0050 and national laws like the Dutch 'Wet bescherming persoonsgegevens' supervised by http://www.dutchdpa.nl/ .
You might have a look at
http://www.harmjschoonhoven.com/mp3-quality.html#listen
where you can hear what MP3 (the MPEG1 Layer III audio codec, as defined in ISO 11172-3) discards by opening one of the links in the table with dBA values. It is pretty horrible.
My impression is that MP3 leaves the sound intact, but compromises the emotional impact. May be a boffin with access to an fMRI scanner can do some research on this.
For the Hubble Space Telescope image of the M60-NGC4647 system see Figure 1 of the article by Anil C. Seth et al.: http://arxiv.org/pdf/1409.4769.pdf .
"M60-UCD1 is the nearly point-like image in the bottom right. The discovery of a black hole in M60-UCD1 provides evidence that it is the tidally stripped nucleus of a once larger galaxy. We note that NGC 4647 is at approximately the same distance as M60 but the two galaxies are not yet strongly interacting. The inset shows a zoomed version of the g band image of M60-UCD1 with contours showing the surface brightness in 1 mag/arcsec2 intervals."
Image Credit: NASA / ESA
I remember a story form New Scientist that the very first CDs could not survive transport in the cargobay of an airplane, because the lower airpressure drew bubbles in the CD. Of course the problem was solved in subsequent pressings of CDs.
My coat is the one with the Hollerith cards in the pocket.
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