Heat is typically introduced via steam running through fin / tube heat exchangers controlled by on / off pneumatic valves.

Some DIP devices, such as segmented LED displays, or those that replace leads with a heat sink fin, skip some leads ; the remaining leads are numbered as if all positions had leads.

Eddy current brakes use magnetic fields to convert kinetic energy into electric current in the brake disc, fin, or rail, which is converted into heat.

Common constructions for heat exchanger include shell and tube, double pipe, extruded finned pipe, spiral fin pipe, u-tube, and stacked plate.

Approach air velocity, choice of material, fin ( or other protrusion ) design and surface treatment are some of the factors which affect the thermal performance of a heat sink.

As heat flows through the fin, the combination of the thermal resistance of the heat sink impeding the flow and the heat lost due to convection, the temperature of the fin and, therefore, the heat transfer to the fluid, will decrease from the base to the end of the fin.

Fin efficiency is defined as the actual heat transferred by the fin, divided by the heat transfer were the fin to be isothermal ( hypothetically the fin having infinite thermal conductivity ).

Rail fins evolved into being and surged into popularity as riders ( Simon Anderson, most famously ) sought a solution to two major performance issues of a central " single " fin-both related to engagement of the foil: For one, a centrally-mounted fin is tilted up out of the water as the board is leaned over, and thus it loses more and more of its lift as the lean angle increases-if the lean angle is acute enough, the fin's tip can be the only area left in the water ; the tip may then rapidly stall and, having lost its lift, become disengaged from the water, leaving the board's bottom as the only control surface still operating.

This word may derive from the culinary practice of sticking the fish's tail and fin to the slices in identifying the fish being eaten.

The sea lions may respond to the dorsal fin of a killer whale and remain vigilant, even when encountering resident fish-eating pods.

A fin may contain only spiny rays, only soft rays, or a combination of both.

*** The tail fin may be rounded at the end.

*** The tail fin may be truncated, or end in a more-or-less vertical edge ( such as in salmon ).

*** The fin may be forked, or end in two prongs.

*** The tail fin may be emarginate, or with a slight inward curve.

*** The tail fin may be lunate, or shaped like a crescent moon.

Additional released in 2011 has suggested that the fin may be vital for the detection of and response to stimuli such as touch, sound and changes in pressure.

Stocky body, bulbous forehead, no prominent beak, long flippers sharply pointed at the tip, black or dark grey color, fin set forward on body, fluke raised before deep dive, may float motionless at the surface, frequently seen in very large groups, prefers deep water, may be approached.

The fillings may contain a variety such as savory roasted chicken, pork, shark fin or sweet mung beans, coconut or durian.

The extensive dorsal and anal fins may merge or nearly merge with the tail fin.

In some species, such as the royal threadfin ( Pentanemus quinquarius ), the thread-like rays may extend well past the tail fin.

They have a single, somewhat high dorsal fin running nearly the entire length of the back ; it may contain 54-58 pliable spines.

Experienced scuba divers may often be identified by the fact that they maintain neutrality without any fin use, as fish do.

The dorsal fin is very small and hooked ; its size is considerably smaller than that of the dwarf sperm whale and may be used for diagnostic purposes.

Identification may be close to impossible at sea – however, the Dwarf is slightly smaller and has a larger dorsal fin.

The first dorsal fin is small, high and pointed ( and may be spinous ); the second dorsal fin runs along the rest of the back and merges with the tail and extensive anal fin.

The dorsal fin has 10-14 rays ; in front of it are the three spines that give the fish its name ( though some individuals may have only 2, or 4 ).

All fins are large, showy and elongated ; the first high dorsal fin usually has four spines ; in males, the first of these spines may be further adorned with filamentous extensions.

* Omni-Flash – This referred to the flashing beacon on the tip of the fin that could be seen all around.

Rail fins are often seen in addition to a central fin, but can be used without a central fin as well.

The inside rail fin ( and the board itself ) can be " pumped ," attacked and re-attacked, by swerving up and down the face, causing acceleration down the line, or similarly pumped to achieve a desired trajectory through a multi-stage turn.

Hydrofoils can be artificial, such as the rudder or keel on a boat, the diving planes on a submarine, a surfboard fin, or occur naturally, as with fish fins, the flippers of aquatic mammals, the wings of swimming seabirds, or other creatures like the sand dollar.

Offshores appear to be smaller than the others, and females are characterized by dorsal fin tips that are continuously rounded.

An individual killer whale can often be identified from its dorsal fin and saddle patch.

In general, goldfish tend to be smaller than koi, and have a greater variety of body shapes and fin and tail configurations.

On the basis of these photographs, British naturalist Peter Scott announced in 1975 that the scientific name of the monster would henceforth be Nessiteras rhombopteryx ( Greek for " The Ness monster with diamond-shaped fin ").

A few close-ups of what would be the creature's diamond-shaped fin were taken in different positions, as though the creature was moving, but the " flipper photograph " has been highly retouched from the original image.

Its tail fin is mainly used as a rudder, but it can be used for a sudden evasive burst of speed that shows none of the care and precision of its usual movements.

For example, in Mayan, the glyph for " fin ", pronounced " ka '", was also used to represent the syllable " ka " whenever the pronunciation of a logogram needed to be indicated, or when there was no logogram.

If there are channels through the middle of the wakeboard and not at the tip or tail, it will be a hard-edging wakeboard but will still release well through the wake, depending on the fin setup.

* New construction window in the US, the term means a window with a nailing fin designed to be inserted into a rough opening from the outside before applying siding and inside trim.

A nailing fin is a projection on the outer frame of the window in the same plane as the glazing, which overlaps the prepared opening, and can thus be ' nailed ' into place.

In guided missiles where the fins can be moved to trim the vehicles in different angles of attack, the center of pressure is the center of pressure of the flow field at that angle of attack for the undeflected fin position.

This jack can be distinguished from the pilot fish by the presence of a first dorsal fin.

, Air Canada fin number 604, was temporarily repaired at Gimli and flew out two days later to be fully repaired at a maintenance base in Winnipeg.

Grow to about 1. 5m, black, with a broad based triangular fin which can be seen as they surface.

They tend to be fairly distinctive due to their size, fin and markings.

The dorsal fin can be seen moving steadily through the water with the tip of the tail moving from side to side behind it.

Any fin must attach directly on to the rear part of the wing, giving a small moment arm from the aerodynamic center, which in turn means that to be effective the fin area must be large.