Skoda houfnice vz 14 Skoda houfnice vz 14 Skoda houfnice vz 14 ("Howitzer model 1914") and Skoda houfnice vz 14/19 ("Howitzer model 1914/1919") were 100 mm (3.93-inch) field howitzers made in Czechoslovakia by the Skoda works. The "Skoda houfnice vz 14" was created in 1914. It was used by the Austro-Hungarian Army during World War I. Large numbers of the howitzers were acquired by Italy after the break-up of the Austro-Hungarian Empire in 1918. An improved version of the howitzer was created in 1919. The main improvement was a longer barrel offering greater range that which could be mounted in the old howitzer beds.
Field emission gun Field emission gun A field emission gun is a type of electron gun in which a sharply pointed Müller-type emitter is held at several kilovolts negative potential relative to a nearby electrode, so that there is sufficient potential gradient at the emitter surface to cause field electron emission. Emitters are either of cold-cathode type, usually made of single crystal tungsten sharpened to a tip radius of about 100 nm, or of the Schottky type, in which thermionic emission is enhanced by barrier lowering in the presence of a high electric field. Schottky emitters are made by coating a tungsten tip