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The ratio of width to height for the frame of the televised picture. 4:3 for standard systems, 5:4 for 1K x 1K, and 16:9 for HDTV. ATSC An acronym for "Advanced Televisions System Committee", the organization that defines the standard for high-definition TV in the United States. Attenuation In general terms, a reduction in signal strength. Auto ...
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]
The service did not meet the 3-hour travel time objective between Boston and New York City. The time was 3 hours and 24 minutes as it partially ran on regular lines, limiting its average speed, with a maximum speed of 240 km/h (150 mph) being reached on a small section of its route through Rhode Island and Massachusetts. [69] [70]
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.
Females born in the US in 2015 have a life expectancy of 81.6 years, and males 76.9 years; more than three years less and as much as over five years less than people born in Switzerland (85.3 F, 81.3 M) or Japan (86.8 F, 80.5 M) in 2015. [71]
In 1900, White men lived an average of 46.3 years and White women lived an average of 48.3 years. [194] African American life expectancy at birth is persistently five to seven years lower than European Americans. [195] Black men have shorter lifespans than any other group in the US besides Native American men. [196]
According to Statista, it is estimated that, in 2022, around 3.96 billion people were using social media globally. This number is up from 3.6 billion in 2020. [57] The following is a list of the most popular social networking services based on the number of active users as of January 2024 per Statista. [58]
A study by Inês Nogueiro et al. (July 2009) on the Jews of north-eastern Portugal (region of Trás-os-Montes) showed that their paternal lines consisted of 35.2% lineages more typical of Europe (R : 31.7%, I : 3.5%), and 64.8% lineages more typical of the Near East than Europe (E1b1b: 8.7%, G: 3.5%, J: 36.8%, T: 15.8%) and consequently, the ...