Helmet

A helmet is a form of protective gear worn to protect the head from injuries.

Ceremonial or symbolic helmets (e.g. UK policeman's helmet) without protective function are sometimes used. The oldest known use of helmets was by Assyrian soldiers in 900BC, who wore thick leather or bronze helmets to protect the head from blunt object and sword blows and arrow strikes in combat. Soldiers still wear helmets, now often made from lightweight plastic materials.

In civilian life, helmets are used for recreational activities and sports (e.g. jockeys in horse racing, American football, ice hockey, cricket, baseball, and rock climbing); dangerous work activities (e.g. construction, mining, riot police); and transportation (e.g. Motorcycle helmets and bicycle helmets). Since the 1990s, most helmets are made from resin or plastic, which may be reinforced with fibers such as aramids.

The word helmet is diminutive from helm, a Medieval word for protective combat headgear. The Medieval great helm covers the whole head and often is accompanied with camail protecting throat and neck as well. Originally a helmet was a helm which covered the head only partly.

List of Game & Watch games

This is a list of Game & Watch games released by Nintendo, along with their format and date of release, if known. See lists of video games for related lists. Several of these games were collected and re-released as ports for the Game & Watch Gallery series for Game Boy, Game Boy Color and Game Boy Advance. The games also were re-released as stand-alone titles for the Nintendo Mini Classics series in the late 1990s. Digital versions of the games were created as DSiWare which was released for Nintendo DSi in 2009 (2010 internationally) and for Nintendo 3DS in 2011.

Models

Games

Ball

Ball, also known as Toss-Up, is a Game & Watch game released as a part of the Silver series on April 28, 1980. It was the first Game & Watch game. It is a single-screen single-player Game & Watch.

It was rereleased exclusively via Club Nintendo to celebrate the 30th anniversary of Game & Watch, with the Club Nintendo logo on the back. Unlike the original release, this version includes a mute switch. For members of the Japanese Club Nintendo, after an announcement in November 2009, it was shipped in April 2010 to Platinum members. For members of the North American Club Nintendo, it was available for 1200 coins from February 2011. For members of the European Club Nintendo, it was available for 7500 stars from November 2011.

Helmet (band)

Helmet is an American alternative metal band from New York City formed in 1989. Founded by vocalist and lead guitarist Page Hamilton, Helmet has had numerous lineup changes, and Hamilton has been the only constant member.

Helmet has released seven studio albums and two compilation albums. The band found mainstream success with their 1992 major label debut Meantime, which debuted at number 68 on the Billboard 200, with singles "Unsung" and "In the Meantime". After the releases of Betty (1994) and Aftertaste (1997), Helmet broke up in 1998, but reformed in 2004. The band has since released three more albums―Size Matters (2004), Monochrome (2006) and Seeing Eye Dog (2010). Helmet is currently working on a new album, which is due for release in 2016.

History

Early years (1989–1991)

After Hamilton had left the Band of Susans, Helmet formed in early 1989. They were spotted by Tom Hazelmyer and signed to Amphetamine Reptile Records, releasing their debut 7 inch single, "Born Annoying", later that year. AmRep released their first album, Strap it On, in 1990.

Tic

A tic is a sudden, repetitive, nonrhythmic motor movement or vocalization involving discrete muscle groups. Tics can be invisible to the observer, such as abdominal tensing or toe crunching. Common motor and phonic tics are, respectively, eye blinking and throat clearing.

Tics must be distinguished from movements of other movement disorders such as chorea, dystonia, myoclonus; movements exhibited in stereotypic movement disorder or some autistic people, and the compulsions of obsessive-compulsive disorder (OCD) and seizure activity.

Classification

Tics are classified as either motor or phonic, and simple or complex.

Motor or phonic

Motor tics are movement-based tics affecting discrete muscle groups.

Phonic tics are involuntary sounds produced by moving air through the nose, mouth, or throat. They may be alternately referred to as verbal tics or vocal tics, but most diagnosticians prefer the term phonic tics to reflect the notion that the vocal cords are not involved in all tics that produce sound.

Tongue-in-cheek

The tongue-in-cheek figure of speech is used to imply that a statement or other production is humorously or otherwise not seriously intended, and it should not be taken at face value. The facial expression typically indicates that one is joking or making a mental effort. In the past, it may also have indicated contempt, but that is no longer common.

By 1842, the phrase had acquired its contemporary meaning, indicating that a statement was not meant to be taken seriously. Early users of the phrase include Sir Walter Scott in his 1828 The Fair Maid of Perth.

History

Putting one's tongue into a cheek was formerly used to signify contempt. For example, in Tobias George Smollett's The Adventures of Roderick Random, which was published in 1748, the eponymous hero is taking a coach to Bath and apprehends a highwayman. This provokes an altercation with a less brave passenger:

A similar usage appears in 1828 in The Fair Maid of Perth by Sir Walter Scott, "The fellow who gave this all-hail thrust his tongue in his cheek to some scapegraces like himself."

Truncated cube

In geometry, the truncated cube, or truncated hexahedron, is an Archimedean solid. It has 14 regular faces (6 octagonal and 8 triangular), 36 edges, and 24 vertices.

If the truncated cube has unit edge length, its dual triakis octahedron has edges of lengths 2 and .

Area and volume

The area A and the volume V of a truncated cube of edge length a are:

Orthogonal projections

The truncated cube has five special orthogonal projections, centered, on a vertex, on two types of edges, and two types of faces: triangles, and octagons. The last two correspond to the B₂ and A₂Coxeter planes.

Spherical tiling

The truncated cube can also be represented as a spherical tiling, and projected onto the plane via a stereographic projection. This projection is conformal, preserving angles but not areas or lengths. Straight lines on the sphere are projected as circular arcs on the plane.

Cartesian coordinates

The following Cartesian coordinates define the vertices of a truncated hexahedron centered at the origin with edge length 2ξ: