zinc phosphate is an inorganic compound with the formula zn 3 po 4 2 h 2 o 4.this white powder is widely used as a corrosion resistant coating on metal surfaces either as part of an electroplating process or applied as a primer pigment see also red lead .it has largely displaced toxic materials based on lead or chromium, and by 2006 it had become the most commonly used corrosion inhibitor.
the australian state of victoria requires its residents to register their motor vehicles and display vehicle registration plates. current regular issue plates are to the standard australian dimensions of 372 mm 14.6 in in length by 134 mm 5.3 in in height, but victoria has used its own serial dies since 1977.
production ran from 1937 to late 1943, with at least 990 vehicles being produced for the army. its full name was leichter panzerspähwagen 2 cm . sd. kfz. 223. an armoured car with similar features to the sd. kfz. 221, but with the addition of a frame antenna and a 30-watt fug 10 medium-range radio set. later versions of the vehicle were .
in the united states, vehicle registration plates, known as license plates, are issued by a department of motor vehicles, an agency of the state or territorial government, or in the case of the district of columbia, the district government.some native american tribes also issue plates. the u.s. federal government issues plates only for its own vehicle fleet and for vehicles owned by foreign .
the conducting particles lose their charge to the drum and are removed from the drum with centripetal acceleration. electrostatic plate separators work by passing a stream of particles past a charged anode. the conductors lose electrons to the plate and are pulled away from the other particles due to the induced attraction to the anode. these .
photostimulated luminescence psl is the release of stored energy within a phosphor by stimulation with visible light, to produce a luminescent signal. x-rays may induce such an energy storage. a plate based on this mechanism is called a photostimulable phosphor psp plate and is one type of x-ray detector used in projectional radiography.
later phototypesetting machines used alternative methods, such as displaying a digitised character on a crt screen. phototypesetting offered numerous advantages over metal type, including the lack of need to keep heavy metal type and matrices in stock, the ability to use a much wider range of fonts and graphics and print them at any desired .
phosphate coatings are used on steel parts for corrosion resistance, lubrication, or as a foundation for subsequent coatings or painting. it serves as a conversion coating in which a dilute solution of phosphoric acid and phosphate salts is applied via spraying or immersion and chemically reacts with the surface of the part being coated to form a layer of insoluble, crystalline phosphates. phosphate conversion coatings can also be used on aluminium, zinc, cadmium, silver and tin. the main types
chroma key compositing, or chroma keying, is a visual effects/post-production technique for compositing layering two images or video streams together based on colour hues chroma range . the technique has been used in many fields to remove a background from the subject of a photo or video – particularly the newscasting, motion picture, and video game industries.
a smoke screen is smoke released to mask the movement or location of military units such as infantry, tanks, aircraft or ships.. smoke screens are commonly deployed either by a canister such as a grenade or generated by a vehicle such as a tank or a warship .. whereas smoke screens were originally used to hide movement from enemies' line of sight, modern technology means that they are now .
hms exeter was the second and last york-class heavy cruiser built for the royal navy during the late 1920s. aside from a temporary deployment with the mediterranean fleet during the abyssinia crisis of 1935–36, she spent the bulk of the 1930s assigned to the atlantic fleet or the north america and west indies station.when world war ii began in september 1939, the cruiser was assigned to .
thin coating of aluminium phosphate or lanthanum iii phosphate is effective in creating a barrier layer blocking access of oxygen to the bam phosphor, for the cost of reduction of phosphor efficiency.
cadmium is a naturally occurring toxic metal with common exposure in industrial workplaces, plant soils, and from smoking. due to its low permissible exposure in humans, overexposure may occur even in situations where trace quantities of cadmium are found. cadmium is used extensively in electroplating, although the nature of the operation does not generally lead to overexposure.
a touchscreen, or touch screen, is a both input and output device and normally layered on the top of an electronic visual display of an information processing system. a user can give input or control the information processing system through simple or multi-touch gestures by touching the screen with a special stylus or one or more fingers.
the autochrome lumière was an early color photography process patented in 1903 by the lumière brothers in france and first marketed in 1907. autochrome was an additive color 'mosaic screen plate' process. it was the principal color photography process in use before the advent of subtractive color film in the mid-1930s.. prior to the lumiere brothers, louis ducos du hauron utilized the .
hull's first dynatron oscillator in 1918 used a special 'dynatron' vacuum tube of his own design shown above , a triode in which the grid was a heavy plate perforated with holes which was robust enough to carry high currents. this tube saw little use as standard triode and tetrodes could function adequately as dynatrons.
the plates thus formed are highly porous, about 80 percent by volume. positive and negative plates are produced by soaking the nickel plates in nickel- and cadmium-active materials, respectively. sintered plates are usually much thinner than the pocket type, resulting in greater surface area per volume and higher currents.
a phosphene is the phenomenon of seeing light without light actually entering the eye.the word phosphene comes from the greek words phos light and phainein to show . phosphenes that are induced by movement or sound may be associated with optic neuritis.. phosphenes can be directly induced by mechanical, electrical, or magnetic stimulation of the retina or visual cortex, or by random firing .