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Sodium-ion batteries (NIBs, SIBs, or Na-ion batteries) are several types of rechargeable batteries, which use sodium ions (Na +) as their charge carriers. In some cases, its working principle and cell construction are similar to those of lithium-ion battery (LIB) types, but it replaces lithium with sodium as the intercalating ion.
Let F be a free ring (that is, free algebra over the integers) with the set X of symbols, that is, F consists of polynomials with integral coefficients in noncommuting variables that are elements of X. A free ring satisfies the universal property: any function from the set X to a ring R factors through F so that F → R is the unique ring ...
Flick Stick is a video game control scheme designed for gyroscopic game controllers.The Flick Stick control scheme is primarily designed for 3D shooter games with the intent of bringing the perceived advantages of mouse aiming to controllers, while addressing shortcomings of traditional first-person shooter controller schemes.
Zinc–air batteries have higher energy density than many other types of battery because atmospheric air is one of the battery reactants, in contrast to battery types that require a material such as manganese dioxide in combination with zinc. Energy density, when measured by weight (mass) is known as specific energy. The following table shows ...
A nickel–hydrogen battery (NiH 2 or Ni–H 2) is a rechargeable electrochemical power source based on nickel and hydrogen. [5] It differs from a nickel–metal hydride (NiMH) battery by the use of hydrogen in gaseous form, stored in a pressurized cell at up to 1200 psi (82.7 bar) pressure. [6]
Throwing baton of a Guanche mencey (king). The ancient Egyptians used throwing sticks to hunt small game and waterfowl, as seen in several wall paintings. The 18th-dynasty pharaoh Tutankhamun was a known lover of duck hunting and used the throwing stick in his hunts, and a number of throwing sticks were found in the tombs of pharaohs.
Schatzki B ring at barium swallow. A Schatzki ring is usually diagnosed by esophagogastroduodenoscopy or barium swallow. Endoscopy usually shows a ring within the lumen of the esophagus which can be of variable size (see picture). The ring is usually located a few centimetres above the gastro-esophageal junction, where the esophagus joins the ...
Often, things discovered for the first time are also called inventions and in many cases, there is no clear line between the two. German-born Albert Einstein, world-famous physicist. Germany has been the home of many famous inventors, discoverers and engineers, including Carl von Linde, who developed the modern refrigerator. [2]