HVAC

HVAC (heating, ventilating, and air conditioning; also heating, ventilation, and air conditioning) is the technology of indoor and vehicular environmental comfort. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. Refrigeration is sometimes added to the field's abbreviation as HVAC&R or HVACR, (heating,ventilating and air-conditioning & Refrigeration) or ventilating is dropped as in HACR (such as the designation of HACR-rated circuit breakers).

HVAC is important in the design of medium to large industrial and office buildings such as skyscrapers, onboard vessels, and in marine environments such as aquariums, where safe and healthy building conditions are regulated with respect to temperature and humidity, using fresh air from outdoors.

Ventilating or ventilation (the V in HVAC) is the process of "exchanging" or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture, odors, smoke, heat, dust, airborne bacteria, and carbon dioxide. Ventilation removes unpleasant smells and excessive moisture, introduces outside air, keeps interior building air circulating, and prevents stagnation of the interior air.

Heater (disambiguation)

Heater is an object that emits heat.

Heater may also refer to:

In electronics:

In music:

In other fields:

Targetmaster

Targetmaster is a subline of the Transformers toyline that include Nebulan sidekicks who can transform into the Transformers' weapons.

1987 Targetmasters

The first Targetmasters assortment, released in 1987, included six new characters, and five existing ones from the 1986 line, whose toys were slightly remolded with larger peg holes to hold their new weapons, as well as an additional peg hole for each remold to mount its weapon in vehicle mode. In 2003, one of the two Japanese-exclusive Targetmasters from 1987 was added to the Autobot ranks. Unfortunately, the Targetmaster weapon he shares with Decepticon Cyclonus, also share names. To further add to the confusion, the printed names of Stepper and Artfire's weapon/partners in Japan are swapped. Cyclonus's partner Nightstick is called Nebulon (the name Fracas is erroneously given on Scourge's box) and paired with Stepper. Scourge's partner Fracas is called Nightstick and paired with Artfire.

The smaller Targetmaster partners were easily lost making them highly collectable and demand high prices on the secondary market.

Kane (crater)

Kane is the walled remains of a lunar crater that has been flooded by lava from Mare Frigoris to the south, and it lies on the northeast edge of this mare. The crater lies midway between the craters C. Mayer to the west and Democritus in the east. To the north-northeast is the crater Moigno.

The floor of this crater is flat and covered in lava flow, with no significant craters within the outer rim. Nothing remains of a central peak, if it ever possessed such a feature. The outer wall displays gaps along the south where it joins the Mare Frigoris. The remainder of the rim is circular but displays wear.

The crater is named after the American Arctic explorer Elisha Kent Kane (1820-1857).

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Kane.

References

Kane (surname)

Kane is a Celtic Irish surname and is an anglicisation of Cathan meaning war like (see Ó Catháin). It is also a noble Norwegian surname. Notable people with the name include:

Actors

Artists

Sportspeople

List of Alien characters

This article lists characters and actors in the Alien series of science fiction films. The series spans four films: Alien (1979), Aliens (1986), Alien 3 (1992), and Alien: Resurrection (1997). The only recurring actress in all four films is Sigourney Weaver, who portrays the series' central character Ellen Ripley.

The film series was subsequently crossed-over with the Predator films with the releases of Alien vs. Predator (2004) and its sequel Aliens vs. Predator: Requiem (2007). Together the two Alien vs. Predator films serve as prequels to the Alien series. The only actor from the Alien films to appear in one of the prequels was Lance Henriksen, who had played the android Bishop in Aliens and a man claiming to be the android's creator in Alien 3. Henriksen returned for Alien vs. Predator, in which he played Charles Bishop Weyland.

Characters overview

Table shows the actors who portrayed the characters in the franchise.

Alien

Ash (Ian Holm) is the Nostromo's inscrutable science officer. He administers medical treatment, conducts biological research and is responsible for investigating any alien life forms the crew may encounter. It is at Ash's insistence that the crew investigates the mysterious signal emanating from LV-426. Ripley becomes suspicious of him when he breaks quarantine protocol by allowing Kane, Dallas, and Lambert to re-enter the Nostromo while the Alien facehugger is attached to Kane. Captain Dallas later informs Ripley that Ash had abruptly replaced the ship's previous science officer, whom Dallas had done five previous missions with, just as the Nostromo left Thedus for its return journey to Earth. Over Ripley's objections, Dallas entrusts Ash with all science-related decisions.