Systematic name

A systematic name is a name given in a systematic way to one unique group, organism, object or chemical substance, out of a specific population or collection. Systematic names are usually part of a nomenclature.

A semisystematic name or semitrivial name is a name that has at least one systematic part and at least one trivial part.

Creating systematic names can be as simple as assigning a prefix or a number to each object (in which case they are a type of numbering scheme), or as complex as encoding the complete structure of the object in the name. Many systems combine some information about the named object with an extra sequence number to make it into a unique identifier.

Systematic names often co-exist with earlier common names assigned before the creation of any systematic naming system. For example, many common chemicals are still referred to by their common or trivial names, even by chemists.

In chemistry

In chemistry, a systematic name describes the chemical structure of a substance, thus giving some information about its chemical properties.

7 Iris

7 Iris is a large main-belt asteroid orbiting the Sun between Mars and Jupiter. It is the fourth brightest object in the asteroid belt. It is classified as an S-type asteroid, meaning that it has a stony composition.

Discovery and name

Iris was discovered on August 13, 1847, by J. R. Hind from London, UK. It was Hind's first asteroid discovery and the seventh asteroid to be discovered overall.

Iris was named after the rainbow goddess Iris in Greek mythology, who was a messenger to the gods, especially Hera. Her quality of attendant of Hera was particularly appropriate to the circumstances of discovery, as she was spotted following 3 Juno by less than an hour of right ascension (Juno is the Roman equivalent of Hera).

Characteristics

Orbit

Iris regularly comes within 0.4AU of Mars and will next do so on November 2, 2054.

Geology

Iris is an S-type asteroid. Its surface likely exhibits albedo differences, with possibly a large bright area in the northern hemisphere. Overall the surface is very bright and is probably a mixture nickel-iron metals and magnesium- and iron-silicates. Its spectrum is similar to that of L and LL chondrites with corrections for space weathering, so it may be an important contributor of these meteorites. Planetary dynamics also indicates that it should be a significant source of meteorites.

Diaphragm (optics)

In optics, a diaphragm is a thin opaque structure with an opening (aperture) at its center. The role of the diaphragm is to stop the passage of light, except for the light passing through the aperture. Thus it is also called a stop (an aperture stop, if it limits the brightness of light reaching the focal plane, or a field stop or flare stop for other uses of diaphragms in lenses). The diaphragm is placed in the light path of a lens or objective, and the size of the aperture regulates the amount of light that passes through the lens. The centre of the diaphragm's aperture coincides with the optical axis of the lens system.

Most modern cameras use a type of adjustable diaphragm known as an iris diaphragm, and often referred to simply as an iris.

See the articles on aperture and f-number for the photographic effect and system of quantification of varying the opening in the diaphragm.

Iris diaphragms versus other types

A natural optical system that has a diaphragm and an aperture is the human eye. The iris is the diaphragm, and the opening in the iris of the eye (the pupil) is the aperture. An analogous dev in a photographic lens is called an iris diaphragm.

Iris (1987 film)

Iris is a 1987 Netherlands film directed by Mady Saks and starring Monique van de Ven.

Plot

A young woman, Iris, runs away to the big city on her eighteenth birthday. She moves in with an architect and decides to become a veterinarian. With an inheritance she buys an existing clinic in a backwoods town where Iris is leered at by the men, scorned by the women. Cruel jokes and gossip eventually lead to violence.A local thug breaks in her house while she is out. When she returns home late night, he attacks her, drag her to the wooden stairs, ties her hands, stretch her legs wide apart and ties to the railing of stairs and rapes her brutally.

References

External links

  • Iris at the Internet Movie Database

  • Iris (EP)

    Iris is Miranda Sex Garden's second release, and first EP.

    Track listing

  • "Lovely Joan" – 2:40
  • "Falling" – 5:39
  • "Fear" – 7:07
  • "Blue Light" – 6:30
  • "Iris" – 7:18

  • Podcasts:

    PLAYLIST TIME:

    Just Can't Win

    by: 10 Years

    You and I share the same reflection
    why dont you see that we cannot survive in this condition
    If you're cut, I'll bleed
    So go on carve into your own heart, I could use a new scar or a brand new start
    Slowly severing the only memories that bind us as one.
    I just dont know
    How to win with you
    And I cant let go, part of me is you.
    We have lost all communication when words fall on deaf ears
    I'm starting to feel a transformation.
    How did I get here?
    I dont recognize my own reflection its a ghost of what once was
    Gone from relative to stranger, separating body from mind
    I just dont know
    How to win with you
    And I cant let go, part of me is you.
    You stay the same
    Allowing me to change
    I just dont know
    How to win with you
    I cant let go, part of me is you.
    I just dont know, just dont know.
    I cant let go, cant let go.




    Latest News for: 7 iris

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    Iris® Powered by Generali Recognized for Leadership in Cybersecurity Innovation, Workplace Excellence, and Human-Centered Security

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