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Gamma-ray sensors are also used for measuring the fluid levels in water and oil industries. [17] Typically, these use Co-60 or Cs-137 isotopes as the radiation source. In the US, gamma ray detectors are beginning to be used as part of the Container Security Initiative (CSI). These machines are advertised to be able to scan 30 containers per hour.
Until 30 September 2007, the minimum age to purchase and consume tobacco products in public was 16 years of age. From 30 September 2007, the Tobacco and Primary Medical Services (Scotland) Act 2010 became effective, raising the minimum purchase, consumption, and possession age to 18 years of age. Section 4: Sale of tobacco products to persons ...
In 2016, the State Administration of Press, Publication, Radio, Film and Television banned images of homosexuals on television. [ 61 ] On April 13, 2018, Sina Weibo , one of China's largest and most popular microblogging platforms, announced a new policy to ban all pieces of contents related to pornography, violence, and homosexuality. [ 62 ]
A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen. [2] The images may represent electrical waveforms on an oscilloscope , a frame of video on an analog television set (TV), digital raster graphics on a computer monitor , or ...
In France, there is an ongoing social, political, and legal debate concerning the wearing of the hijab and other forms of Islamic coverings in public. The cultural framework of the controversy can be traced to France's history of colonization in North Africa, [1] but escalated into a significant public debate in 1989 when three girls were suspended from school for refusing to remove their ...
3 January: A free online index with metadata about over 200 million scientific documents is launched, OpenAlex. [1]The graphs show one visualization of recent developments of science overall based on this data (fewer papers may not be associated with decreasing success, priority, impact or activity).
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