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Persol is an Italian luxury eyewear brand specializing in the manufacturing of sunglasses and optical frames. It is one of the oldest eyewear companies in the world and is owned by the Luxottica group. The name is derived from the Italian per il sole, meaning "for the sun". Formed in 1917 by Giuseppe Ratti, Persol originally catered to pilots ...
Pattinson's process or pattinsonisation is a method for removing silver from lead, discovered by Hugh Lee Pattinson in 1829 [1] and patented in 1833. The process is dependent on the fact that lead which has least silver in it solidifies first on liquefaction , leaving the remaining liquid richer in silver.
s. -process. The slow neutron-capture process, or s-process, is a series of reactions in nuclear astrophysics that occur in stars, particularly asymptotic giant branch stars. The s -process is responsible for the creation ( nucleosynthesis) of approximately half the atomic nuclei heavier than iron . In the s -process, a seed nucleus undergoes ...
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A process control block ( PCB ), also sometimes called a process descriptor, is a data structure used by a computer operating system to store all the information about a process . When a process is created (initialized or installed), the operating system creates a corresponding process control block, which specifies and tracks the process state ...
The 24th Waffen Mountain Division of the SS Karstjäger was a German mountain infantry division of the Waffen-SS, the armed wing of the Nazi Party that served alongside, but was never formally part of, the German armed forces during World War II. Formed on 18 July 1944 from a battalion, it was understrength and was soon reduced to a brigade.
v. t. e. Z-Library (abbreviated as z-lib, formerly BookFinder) is a shadow library project for file-sharing access to scholarly journal articles, academic texts and general-interest books. It began as a mirror of Library Genesis, but has expanded dramatically. [ 6][ 7]
Cayley's Ω process. In mathematics, Cayley's Ω process, introduced by Arthur Cayley ( 1846 ), is a relatively invariant differential operator on the general linear group, that is used to construct invariants of a group action . As a partial differential operator acting on functions of n2 variables xij, the omega operator is given by the ...