Chamber (firearms)

In firearms, the chamber is the portion of the barrel or firing cylinder in which the cartridge is inserted prior to being fired. Rifles and pistols generally have a single chamber in their barrels, while revolvers have multiple chambers in their cylinders and no chamber in their barrel. Thus rifles and pistols can usually be fired even with a detached magazine, while a revolver cannot be fired with its cylinder swung out.

The act of chambering a cartridge means the insertion of a round into the chamber, either manually or through the action of the weapon, e.g., pump-action, lever-action, bolt action, or automatic action generally in anticipation of firing the weapon, without need to 'load' the weapon upon decision to use it (reducing the number of actions needed to discharge).

In firearms design or modification, "chambering" is fitting a weapon for a particular caliber or round, so a Colt Model 1911 is chambered for .45 ACP or .38 Super, or re-chambered for .38/.45 Clerke.

Chamber (comics)

Jonothon "Jono" Evan Starsmore, better known as Chamber or Decibel, is a fictional superhero appearing in American comic books published by Marvel Comics. The character is usually associated with the X-Men and the New Warriors.

A British mutant, Jono possessed the ability to cast energy blasts from his chest. He had limited control of his power and destroyed much of his chest and lower face when his powers emerged. Recently, he lost his powers on 'M Day' and now uses technology to give himself sonic based abilities.

Jono was a member of the X-Men's junior team Generation X, although he was sullen and moody and had difficulty bonding with teammates. He has since been offered a permanent position in the X-Men's teaching staff.

Publication history

Created by writer Scott Lobdell and artist Chris Bachalo, he first appeared in Generation X #1 (September 1994).

Fictional character biography

Origin

Operation Sigma Sigma

The Sigma is an experimental glider developed in Britain from 1966 by a team led by Nicholas Goodhart. After disappointing performance during flight testing the Sigma was passed on to a Canadian group which carried out modifications, making the Sigma more competitive.

Design and development

Designed to compete in the 1970 World Championships, the team aimed to develop a wing that would climb well through a high lift coefficient and a large wing area, but equally had the "maximum possible reduction of area for cruise at low lift coefficients". At the same time for the minimum possible drag they aimed for "extensive" laminar flow. To achieve this they employed flaps that would alter both wing area and wing camber. Based on analysis of the nature of thermals encountered in cross-country flying, they reasoned that by having a slow turning circle, their sailplane could stay close to the central (and strongest) part of the thermal and gain maximum benefit.

Its unusual feature is its ability to vary its wing area using Fowler flaps. It had been tried before by the Hannover Akaflieg in 1938 with their AFH-4, the South African Beatty-Johl BJ-2 Assegai and the SZD Zefir gliders.

Sigma (cosmology)

Sigma in cosmology was a property of galaxies used when trying to work out the mystery of galaxies and their supermassive black holes.

History

In the late 1990s the NUKER experts had made observations with a spectroscope of two galaxies, one of an active galaxy with an active galactic nucleus called NGC10-68 and a dormant galaxy next door to us named Andromeda.

The observations are shown. The light from the centre in Andromeda galaxy was distorted proving the existence of super-massive black holes.

Other observations proved most galaxies had a similar centre whether it be active or dormant.

They then realised that the black holes must have something to do with a galaxy's formation, so they turned to something they thought was useless: the speed of the stars around the edge of the galaxy. This was Sigma, the speed of the stars at the edge of the galaxy supposedly unaffected by the mass of the black hole at the centre.

Usage In Cosmology

The NUKER team calculated the sigma of several stars in different galaxies and the mass of the black hole at the (nucleus) centre. They expected no correlation what so ever. But when plotting their results on a Scatter diagram and drawing a line of best fit they ended up with a positive correlation. It appeared that the heavier the black hole at the centre was the faster the stars within the galaxy travelled.

Sigma (duo)

Sigma is an English drum and bass duo consisting of Cameron Edwards and Joe Lenzie. They met at Leeds University at drum and bass nights. Their 2010 collaboration with DJ Fresh, "Lassitude", peaked at number 98 on the UK Singles Chart. Their single "Nobody to Love" topped the UK Singles Chart, becoming their first UK number one. Follow-up single "Changing", featuring Paloma Faith, also got to number one.

Career

Formation

Lenzie and Edwards met in 2006 at Leeds University; Cameron was working in local record store Tribe Records and with Echo Location's Obi running local night Event Horizon, while Lenzie was DJing hip-hop and warming up Event Horizon for such acts as Rahzel and Grandmaster Flash. Once they had finished in Leeds, they relocated to London and became a three-piece with Edwards' school friend Ben Mauerhoff, being signed under DJ Fresh's Breakbeat Kaos. After a while, long distances took their toll – Edwards and Mauerhoff were based in Surrey, whereas Lenzie was based in Harpenden, Hertfordshire and they couldn't get three people into the Harpenden studio – and Mauerhoff left. In December 2008 they formed their own record label, Life Recordings (so called because, according to Lenzie, the industry demanded that it be their life). Its inaugural release was a VIP mix of their early Bingo Beats single "El Presidente".

Deep (Niacin album)

Deep is the third studio album from the jazz rock fusion trio Niacin, released in March 2000.

The album is heavily loaded with Billy Sheehan's powerful bass solos and features contributions from guest musicians Glenn Hughes on vocals and Steve Lukather on guitar.

Track listing

Personnel

Musicians

Guest musicians

External links

References

Ten (Pearl Jam album)

Ten is the debut studio album by the American rock band Pearl Jam, released on August 27, 1991 through Epic Records. Following the disbanding of bassist Jeff Ament and guitarist Stone Gossard's previous group Mother Love Bone, the two recruited vocalist Eddie Vedder, guitarist Mike McCready, and drummer Dave Krusen to form Pearl Jam in 1990. Most of the songs began as instrumental jams, to which Vedder added lyrics about topics such as depression, homelessness, and abuse.

Ten was not an immediate success, but by late 1992 it had reached number two on the Billboard 200 chart. The album produced three hit singles: "Alive", "Even Flow", and "Jeremy". While Pearl Jam was accused of jumping on the grunge bandwagon at the time, Ten was instrumental in popularizing alternative rock in the mainstream. In February 2013, the album crossed the 10 million mark in sales and has been certified 13x platinum by the RIAA. It remains Pearl Jam's most commercially successful album.

Background