Hermetic seal

A hermetic seal is the quality of something—a container, structure, etc.—being airtight (excluding passage of air, oxygen, or other gases). Used technically, it is stated in conjunction with a specific test method and conditions of use.

Etymology

The word hermetic comes from the Greek god Hermes, via the vocabulary of alchemy. The alchemists invented a process for making an airtight glass tube, which they used for distillation. The process used a secret seal, whose invention was attributed to the legendary inspiration of alchemy, Hermes Trismegistus.

Uses

Some kinds of packaging must maintain a seal against flow of gases: foods, pharmaceuticals, some chemicals, and some consumer goods. The term can describe food preservation practices, such as vacuum packing and canning. Barrier packaging includes containers such as glass, aluminum cans, metal foils, and high barrier plastics.

Buildings designed with sustainable architecture principles use airtight technologies to conserve energy. Under low energy building, passive house, low-energy house, self-sufficient homes, zero energy building, and superinsulation standards, structures must be more air-tight than previously. Air barriers, careful sealing of construction joints and service penetrations (holes for pipes, etc.) achieve this. Airtightness minimizes the amount of warm (or cool) air that can pass through the structure, so the mechanical ventilation system can recover the heat before discharging air externally. Green buildings may include windows that combine triple-pane insulated glazing with argon or krypton gas to reduce thermal conductivity and increase efficiency. In landscape and exterior construction projects, airtight seals protect general service and landscape lighting electrical connections and splices. Many other specific applications must meet airtight standards to be waterproof or vapor-proof for human safety and proper function.

Airtight (G.I. Joe)

Airtight is a fictional character from the G.I. Joe: A Real American Hero toyline, comic books and cartoon series. He is the G.I. Joe Team's hostile environment specialist and debuted in 1985.

Profile

His real name is Kurt Schnurr and his rank is that of corporal E-4. Airtight was born in New Haven, Connecticut.

Airtight was a misfit kid, who was known for his collection of plastic dinosaurs, and being able to hold his breath the longest. He grew up into the type of adult, who would wade into a cloud of toxic gas strong enough to dissolve lung tissue with one whiff. He is a trained expert in chemical weaponry, and is able to detect, identify, neutralize and contain viruses and poisons. His primary military specialty is CBR (Chemical, Biological and Radiological Warfare), and his secondary military specialty is ordnance. He is noted for being a practical joker, but his actions during battle make up for this reputation.

When the G.I. Joe team temporarily disbanded, Airtight returned to duty in the US Army as a CBR Warfare Specialist, and was eventually promoted to Sergeant E-5. He has been called back to active reserve status upon reinstatement of the team, in the event his skills are needed for a future mission.

Airtight (film)

Airtight is an upcoming American drama thriller film written, produced and directed by Derek Estlin Purvis. A riveting psychological thriller set in a NY mansion and an homage to Alfred Hitchcock, Airtight is based on the true events that inspired a play in the 1920s, an adaptation by Hitchcock in the 1940s and this feature film from 2013. Airtight made good on its attempt to complete the film in fewer shots than Hitchcock did with his, capturing it in full in just 4 shots. A 38-minute single shot anchors the center of the film and is believed to be in the top ten longest single shots in American Film history .

Plot

Bradley and Connor are intellectual elitists who've secretly been planning to murder a former college classmate and close friend, Ronald. Ronald has gathered all of his family and friends to make a big announcement. What Ronald doesn't know is that he will become the victim when Bradley and Connor decide that natural selection is no longer doing its job. It's up to them to force Ronald to defend himself and prove that only the strong survive. Unfortunately, he is physically overpowered, bound, gaged and put into an airtight, soundproof chest in the middle of the living room that will be the stage for the night's festivities. Once they've sealed the chest, there is only one hour's worth of air. He will slowly suffocate right beneath his closest friends and family without them ever knowing.

Helicopter

A helicopter is a type of rotorcraft in which lift and thrust are supplied by rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward, and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of VTOL (vertical takeoff and landing) aircraft cannot perform.

The word helicopter is adapted from the French language hélicoptère, coined by Gustave Ponton d'Amécourt in 1861, which originates from the Greek helix (ἕλιξ) "helix, spiral, whirl, convolution" and pteron (πτερόν) "wing". English-language nicknames for helicopter include "chopper", "copter", "helo", "heli", and "whirlybird".

Helicopters were developed and built during the first half-century of flight, with the Focke-Wulf Fw 61 being the first operational helicopter in 1936. Some helicopters reached limited production, but it was not until 1942 that a helicopter designed by Igor Sikorsky reached full-scale production, with 131 aircraft built. Though most earlier designs used more than one main rotor, it is the single main rotor with anti-torque tail rotor configuration that has become the most common helicopter configuration. Tandem rotor helicopters are also in widespread use due to their greater payload capacity. Coaxial helicopters, tiltrotor aircraft, and compound helicopters are all flying today. Quadcopter helicopters pioneered as early as 1907 in France, and other types of multicopter have been developed for specialized applications such as unmanned drones.

Helicopter (Download album)

Helicopter is the seventh studio album by the post-industrial electronic band Download. Much like Download's previous release, FiXeR, Helicopter features a guest appearance by former vocalist, Mark Spybey. It also puts a prominent focus on analogue equipment, using the oldest machines that Subconscious Studios had to offer.
Initially given a limited release as part of Subconscious Communications' Beyond The Vault series, Helicopter eventually sold out and, in 2011, was given a second pressing and a wider release through Metropolis Records. This re-release is retitled Helicopter + Wookie Wall, and features three additional tracks. According to Simon Paul, designer of the Helicopter's original album art, the art of this re-release will be an amalgamation of the album's original artwork and the artwork he submitted for the proposed Wookie Wall EP.
The song "Message From Gort" is a reference to the PlatEAU album Gort Spacebar, which was also a Key and Western project and released as part of the Beyond The Vault series.

Helicopter (song)

"Helicopter" is a song by English rock band Bloc Party that was originally released in the UK in 2004 on the Little Thoughts EP, and two years later as a single from their debut album, Silent Alarm in the US. The song was received with much acclaim, reaching number 26 on the UK Singles Chart on its first release, but failing to chart in the US. Various remixes have been recorded.

The song has also been featured on the video games Guitar Hero III: Legends of Rock, Guitar Hero: On Tour, FIFA 06, Project Gotham Racing 3, Burnout Revenge, Colin McRae Dirt 2, and Marc Eckō's Getting Up: Contents Under Pressure. The song was also featured in the films Yes Man, Charlie St. Cloud and Grandma's Boy and in the Malcolm in the Middle episode "Morp". A remix of the song was featured in the film Reverb.

Composition

"Helicopter" is an indie rock and garage rock song, written by all band members prior to their debut studio album. Composed in B minor, it was written in common time and has a quick tempo of 171 beats per minute.