Convention relating to the Status of Stateless Persons the Convention, doing so on 27 September 2018. Madagascar denounced its accession made in 1962, effective 2 April 1966. The United Kingdom extended the convention to British Hong Kong, and China has declared that the convention continues to apply to Hong Kong post-1997. Convention relating to the Status of Stateless Persons The Convention relating to the Status of Stateless Persons is a 1954 United Nations multilateral treaty that aims to protect stateless individuals. The United Nations Charter and Universal Declaration of Human Rights were approved on 10 December 1948. Of significance, the Declaration at Article 15 affirms that: The Convention
Ti-sapphire laser Ti-sapphire laser Ti:sapphire lasers (also known as Ti:AlO lasers, titanium-sapphire lasers, or Ti:sapphs) are tunable lasers which emit red and near-infrared light in the range from 650 to 1100 nanometers. These lasers are mainly used in scientific research because of their tunability and their ability to generate ultrashort pulses. Lasers based on Ti:sapphire were first constructed and invented in June 1982 by Peter Moulton at the MIT Lincoln Laboratory. Titanium-sapphire refers to the lasing medium, a crystal of sapphire (AlO) that is doped with titanium ions. A Ti:sapphire laser is usually pumped with another laser with a wavelength of 514