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
Sapphire emission. Synthetic sapphire—sometimes referred to as "sapphire glass"—is commonly used as a window material, because it is both highly transparent to wavelengths of light between 150 nm (UV) and 5500 nm (IR) (the visible spectrum extends about 380 nm to 750 nm), and extraordinarily scratch-resistant. The key benefits of sapphire windows are: Some sapphire-glass windows are made from pure sapphire boules that have been grown in a specific crystal orientation, typically along the optical axis, the c-axis, for minimum birefringence for the application. The boules are sliced up into the desired window thickness and finally polished to the desired surface