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Artificial intelligence (AI), in its broadest sense, is intelligence exhibited by machines, particularly computer systems.It is a field of research in computer science that develops and studies methods and software that enable machines to perceive their environment and use learning and intelligence to take actions that maximize their chances of achieving defined goals. [1]
Trains are divided into three categories (called "Le Frecce"): Frecciarossa ("Red arrow") trains operate at a maximum of 300 km/h (185 mph) on dedicated high-speed tracks; Frecciargento (Silver arrow) trains operate at a maximum of 250 km/h (155 mph) on both high-speed and mainline tracks; Frecciabianca (White arrow) trains operate at a maximum ...
A 2004 study by Shen et al. compared the Y-DNA and DNA-mt of 12 Samaritan men with those of 158 men who were not Samaritans, divided between 6 Jewish populations (Ashkenazi, Moroccan, Libyan, Ethiopian, Iraqi, and Yemeni) and 2 non-Jewish populations from Israel (Druze and Arab). The study concludes that significant similarities exist between ...
Variable Bit Rate (VBR) A compression scheme in which each unit of input material can be compressed to different sizes. For MPEG-2 video, for example, this means that “easier” sequences (that is, with no motion) can compress to very small sizes, whereas “hard” sequences (with lots of motion and scene cuts) can compress to much larger sizes.
The Milky Way [c] is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars in other arms of the galaxy, which are so far away that they cannot be individually distinguished by the naked eye.
The PLATO system was launched in 1960 at the University of Illinois and subsequently commercially marketed by Control Data Corporation.It offered early forms of social media features with innovations such as Notes, PLATO's message-forum application; TERM-talk, its instant-messaging feature; Talkomatic, perhaps the first online chat room; News Report, a crowdsourced online newspaper, and blog ...
Politically, Europe is divided into about fifty sovereign states, of which Russia is the largest and most populous, spanning 39% of the continent and comprising 15% of its population. Europe had a total population of about 745 million (about 10% of the world population ) in 2021; the third-largest after Asia and Africa.