Interesting

Researchers Develop High-Tech Device That Simulates Holding a Girl’s Hand

Developed by a research team at Gifu University, in Japan, “My Girlfriend in Walk” is an ingenious device that aims to recreate the experience of holding your girlfriend’s hand, without an actual girlfriend. The act of walking hand in hand with the opposite sex, be they partner or friend, can be very satisfying, but we don’t always have someone to do it with. Luckily, technology has evolved enough to provide a viable surrogate, kind of…

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Cross Section Of Different Bullets

Why do the bullets have different gun powder? Some of them it is finer and some more corse.

The grain size and shape effects the burn rate of the powder. The faster the burn, the more impulse it will have. The goal is to have a charge burn for the duration of when the bullet is in the barrel of the gun, so faster burn or not loading enough grains will be inefficient because you aren’t providing enough energy, more like slapping a drag car and expecting it to make the quarter mile. Too much powder charge can be dangerous for chamber pressure and can cause physical failure of the case and firearm, and too long of a burn is just inefficient because you’re burning after the bullet is long gone, like holding the gas pedal to the floor well after your drag car has passed the quarter mile mark and the race is over.

Cutaway of the Sabot Tank Round

Sabot rounds work like a basic arrow. They don’t have any explosive power; they penetrate armor with shear momentum. The heart of the sabot round is the penetrator — a narrow metal rod (typically depleted uranium) with a pointed nose on one end and stabilizing fins on the other. Before the round is fired, the rear part of the penetrator is attached to a propellant case, and the front part is attached to the sabot structure. The sabot’s purpose is to keep the narrow penetrator centered in the wide gun barrel.

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Where the term ‘uppercase and ‘lowercase’ came from: from the early days of the printing press

The individual type blocks used in hand typesetting are stored in shallow wooden or metal drawers known as "type cases". Each is subdivided into a number of compartments ("boxes") for the storage of different individual letters.

The terms upper and lower case originate from this division. By convention, when the two cases were taken out of the storage rack, and placed on a rack on the compositor’s desk, the case containing the capitals and small capitals stood at a steeper angle at the back of the desk, with the case for the small letters, punctuation and spaces being more easily reached at a shallower angle below it to the front of the desk, hence upper and lower case.

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