At least they weren't
5 1/4 8 inch floppies (of which I have a few still floating around). FTHFY
681 posts • joined 3 Sep 2012
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.
Don't forget LED-lamps. The LEDs may have an average lifetime of 20+ khour, but the mini-powerconverter in the socket will fail much sooner. Leading to e-waste with rare-earth metals that will not be recycled.
Then there is the holy cow, the automobile - or how do you call them in you local dialect. The are not (yet) chockfull of e-waste, but the amount of Fe, Al and plastics when they are scrapped must be impressive. Add to that the problem of recycling Li-batteries.
OpenCV's Haarfilter is designed to recognize faces. Trouble is, the analysis is based on grey-scale images. So a kitchen-cupboard with two knobs is also recognized as a face. Now compare the colour of the inscribed ellipsis of the 'face' to the human skincolours which all lay in a well-defined column in RGB-space and you have a DIY face recognition system.
Bob should read https://www.wbur.org/cognoscenti/2020/04/03/hold-the-line-coronavirus-jonathan-smith as you all should do.
When this proposition (withholding grain from Sicily from the people) came to the ears of the people, it excited so great an indignation against Coriolanus, that, on coming out of the Senate, he would have been killed in a tumultuary manner, if the Tribunes had not summoned him to appear before them and defend his cause. This occurrence shows, as we have said above, how useful and necessary it is for a republic to have laws that afford to the masses the opportunity of giving vent to the hatred they may have conceived against any citizen; for if there exist no legal means for this, they will resort to illegal ones, which beyond doubt produce much worse effects.
Niccolò Machiavelli, Discorsi (1531), Book 1, Cap. VII.
The ancient Greek did something like that in naval battles. It was called a scorpion bomb. A earthware pot with a scorpion inside was thrown to an adversary trireme. The pot shattered and panic among the rowers was assured.
At the time it was considered fair play.
The Chinese technology company Cloudwalk is building a facial recognition database in Zimbabwe. Biometric data of Zimbabwians will be exported to China to train the algorithms to better recognize people of African descent. The software can then be exported to other African countries for a high price.
Biting the hand that feeds IT © 1998–2020