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 baryon

The Sigma baryons are a family of subatomic hadron particles which have a +2, +1 or −1 elementary charge or are neutral. They are baryons containing three quarks: two up and/or down quarks, and one third quark, which can be either a strange (symbols Σ+, Σ0, Σ−), a charm (symbols Σ++
c, Σ+
c, Σ0
c), a bottom (symbols Σ+
b, Σ0
b, Σ−
b) or a top (symbols Σ++
t, Σ+
t, Σ0
t) quark. However, the top Sigmas are not expected to be observed as the Standard Model predicts the mean lifetime of top quarks to be roughly 6975500000000000000♠5×10⁻²⁵ s. This is about 20 times shorter than the timescale for strong interactions, and therefore it does not form hadrons.

List

The symbols encountered in these lists are: I (isospin), J (total angular momentum), P (parity), u (up quark), d (down quark), s (strange quark), c (charm quark), t (top quark), b (bottom quark), Q (charge), B (baryon number), S (strangeness), C (charmness), B′ (bottomness), T (topness), as well as other subatomic particles (hover for name).

Six Sigma

Six Sigma is a set of techniques and tools for process improvement. It was introduced by engineer Bill Smith while working at Motorola in 1986.Jack Welch made it central to his business strategy at General Electric in 1995. Today, it is used in many industrial sectors.

Six Sigma seeks to improve the quality of the output of a process by identifying and removing the causes of defects and minimizing variability in manufacturing and business processes. It uses a set of quality management methods, mainly empirical, statistical methods, and creates a special infrastructure of people within the organization, who are experts in these methods. Each Six Sigma project carried out within an organization follows a defined sequence of steps and has specific value targets, for example: reduce process cycle time, reduce pollution, reduce costs, increase customer satisfaction, and increase profits.

The term Six Sigma originated from terminology associated with statistical modeling of manufacturing processes. The maturity of a manufacturing process can be described by a sigma rating indicating its yield or the percentage of defect-free products it creates. A six sigma process is one in which 99.99966% of all opportunities to produce some feature of a part are statistically expected to be free of defects (3.4 defective features per million opportunities). Motorola set a goal of "six sigma" for all of its manufacturing operations, and this goal became a by-word for the management and engineering practices used to achieve it.

A Good Scent from a Strange Mountain

A Good Scent from a Strange Mountain is a 1992 collection of short stories by Robert Olen Butler. It received the Pulitzer Prize for Fiction in 1993.

Each story in the collection is narrated by a different Vietnamese immigrant living in the U.S. state of Louisiana. The stories are largely character-driven, with cultural differences between Vietnam and the United States as an important theme. Many of the stories were first published in journals such as The Hudson Review, The Southern Review, and The Virginia Quarterly Review. The collection was re-released in 2001 with two additional stories, "Salem" and "Missing".

Synopsis

Open Arms

The opening story is set during the Vietnam War. The narrator, a translator for the Australian forces, recounts the story of a North Vietnamese communist named Thập who joins the Australian forces as a spy, after the communists massacre his family. When the Australian soldiers bring him to a screening of pornographic films, Thập seems overwhelmed and disgusted. The narrator speculates that, as a former Communist, he considers pornography immoral, and that it simultaneously reminds him of his longing for his dead wife. Thập later kills an Australian soldier and himself.

Snow cream

Snow cream can be one of two distinct desserts.

The cream-based dessert

The cream-based variety of Snow "Cream" is an old English recipe. It is known in continental Europe at least as early as the late 15th or early 16th century where it can be found in the Dutch recipe collection now known as KANTL Gent 15. It has been suggested that "Snow" may be even older than that.

The common ingredients for early recipes are cream, rosewater and sugar, whipped until stiff. Other flavouring agents, e.g., cloves or ginger, are also known from various recipes. It is the process of whipping cream until stiff that is often likened to snow as can be seen in passages such as "Beat your cream with a stick until the Snow rises ...". It was often draped over another item to give the appearance of snow having fallen over the item.

Snow (1963 film)

Snow is a short documentary film made by Geoffrey Jones for British Transport Films in 1962-1963. The 8-minute long film shows the efforts of British Railways staff in coping with the 1963 United Kingdom cold wave. An example of "pure cinema", it was nominated for an Academy Award in 1965.

The film had its origins in primary research for a documentary about the British Railways Board. Jones' test research coincided with one of the coldest winters on record, and Jones approached BTF producer Edgar Anstey with the idea to contrast the comfort of the passengers with the efforts of the railway workmen in keeping trains going in the frozen conditions. Work began on the documentary straight after gaining approval, and Jones and cameraman Wolfgang Suschitzky travelled around the country filming scenes for the rest of the winter.

The film was edited to a re-recorded version of Sandy Nelson's "Teen Beat" by Johnny Hawksworth, expanded to twice its original length by accelerating the tempo over the duration of the film. BBC Radiophonic Workshop composer Daphne Oram then added various effects to the soundtrack.