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Conjugation can be used to extract the scalar and vector parts of a quaternion. The scalar part of p is 1 / 2 ( p + p ∗ ) , and the vector part of p is 1 / 2 ( p − p ∗ ) . The square root of the product of a quaternion with its conjugate is called its norm and is denoted ‖ q ‖ (Hamilton called this quantity the tensor ...
Channellock is an American company that produces hand tools.It is best known for its pliers—the company manufactures more than 75 types and sizes of pliers [1] —particularly its eponymous style of tongue-and-groove, slip-joint pliers. [2]
A typical 105-key computer keyboard, consisting of sections with different types of keys. A computer keyboard consists of alphanumeric or character keys for typing, modifier keys for altering the functions of other keys, [1] navigation keys for moving the text cursor on the screen, function keys and system command keys—such as Esc and Break—for special actions, and often a numeric keypad ...
Diagram of the various groups of the Red Orchestra. The name Rote Kapelle was a cryptonym that was invented for a secret operation started by Abwehrstelle Belgium (Ast Belgium), a field office of Abwehr III.F in August 1941 and conducted against a Soviet intelligence station that had been detected in Brussels in June 1941. [10]
This sub-section is about paper making; for the writing material first used in ancient Egypt, see papyrus.. Paper: Although it is recorded that the Han dynasty (202 BC – AD 220) court eunuch Cai Lun (50 AD – AD 121) invented the pulp papermaking process and established the use of new materials used in making paper, ancient padding and wrapping paper artifacts dating from the 2nd century BC ...
The Hartzog model had no oil filtration system, meaning that filtering had to be done manually, and the pressure fryers occasionally exploded often harming employees. [113] In 1969, inventor and engineer Winston L. Shelton developed the "Collectramatic" pressurized fryer to overcome the problems KFC faced in quickly frying chicken to meet ...
Due to supply chain capacity limitations, some manufacturers began 3D printing material such as nasal swabs and ventilator parts. [ 186 ] [ 187 ] In one example, an Italian startup received legal threats due to alleged patent infringement after reverse-engineering and printing one hundred requested ventilator valves overnight. [ 188 ]
Story structure or narrative structure is the recognizable or comprehensible way in which a narrative's different elements are unified, including in a particularly chosen order and sometimes specifically referring to the ordering of the plot: the narrative series of events, though this can vary based on culture.