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".

Tape

Tape may refer to:

Recording media

Tape (film)

Tape is a 2001 American camcorder drama film directed by Richard Linklater and written by Stephen Belber, based on his play of the same name. It stars Ethan Hawke, Robert Sean Leonard, and Uma Thurman. The entire film takes place in real time.

Plot

The entire film is set inside a Lansing, Michigan motel room. Vince, a drug dealer/volunteer firefighter from Oakland, rents the room in his hometown to support his old high school friend's entry into the Lansing Film Festival.

His friend, documentary filmmaker Jon Salter, joins Vince in his motel room and the two reminisce about their high school years. At first, the two are happy to see one another, but friction soon develops. Eventually, they get on the subject of Amy, Vince's former girlfriend. It appears that, while they dated for some time, Vince and Amy never had sex. However, after or at the point when their relationship had ended, Amy slept with Jon.

Vince claims Amy had told him that Jon had raped her. Vince becomes obsessed with, and eventually succeeds in getting a verbal confession from Jon. Immediately after Jon's admission, Vince pulls out a hidden tape recorder that had been recording their whole conversation, much to Jon's horror. Vince then tells Jon that he has invited Amy to dinner, and that she will be arriving shortly.

Playing card

A playing card is a piece of specially prepared heavy paper, thin cardboard, plastic-coated paper, cotton-paper blend, or thin plastic, marked with distinguishing motifs and used as one of a set for playing card games. Playing cards are typically palm-sized for convenient handling.

A complete set of cards is called a pack (UK English), deck (US English), or set (Universal), and the subset of cards held at one time by a player during a game is commonly called a hand. A pack of cards may be used for playing a variety of card games, with varying elements of skill and chance, some of which are played for money (e.g., poker and blackjack games at a casino). Playing cards are also used for illusions, cardistry, building card structures, cartomancy and memory sport.

The front (or "face") of each card carries markings that distinguish it from the other cards in the pack and determine its use under the rules of the game being played. The back of each card is identical for all cards in any particular pack to create an imperfect information scenario. Usually every card will be smooth; however, some packs have braille to allow blind people to read the card number and suit.

List of Gargoyles characters

In the animated television series Gargoyles and the spinoff comic books Gargoyles (SLG comic) and Gargoyles: Bad Guys, Gargoyles are a species of winged humanoid creatures that are the focus of the show.

Gargoyles

Several clans of gargoyles exist worldwide (although until recently, they were unaware of each other's existence), and each clan has distinct cultural and morphological characteristics. All gargoyle clans are alike in that each has a particular item, area, or concept that they strive to protect. They are fierce warriors and are incredibly powerful and resilient; their appearance and ferocity (along with the fact that they are nocturnal creatures) often means that humans vilify them as demons and monsters. Most of the world's gargoyle clans do not peacefully co-exist with humans.

Gargoyles are particularly notable for entering a sort of stone hibernation, called "stone sleep", during the day, during which they resemble Gothic statues. During daylight, they can quickly heal from injury and illness, and are protected from most natural threats. However, this state makes them easy targets for destruction by their enemies and humans who hate them. The character Anton Sevarius postulated that, in this hibernation, they absorb solar radiation that allows them to store energy; otherwise, he concluded, the strenuous activity of gliding would require a nutritional intake equivalent to eating three cows a day. Damage during stone sleep can be fatal to a gargoyle. If a gargoyle dies during its hibernation, its body will remain stone.