Han

Han may refer to:

China

Chinese history

Haná

Haná or Hanakia (Czech: Haná or Hanácko, German: Hanna or Hanakei) is an ethnic region in central Moravia in the Czech Republic. Its main parts are located in the lowlands of the rivers of Morava and Haná. It is roughly encircled by the cities of Zábřeh, Holešov, Vyškov and Uničov. Haná is primarily known for its agricultural productivity, costumes, and traditional customs. The Haná dialect (Hanakian dialect or Central Moravian dialect; Czech: hanáčtina) is spoken in the region, and is part of the Central Moravian dialect group. This traditional dialect has been preserved and continues to be used even in printed publications from the region. Folk music from Haná is recognized locally by its lyrics in the Haná dialect.

Name

In the 18th and 19th century, the term "Hanack" (Hanák, French: Hanaque), was used for a Slavic people, peasants, in Moravia. Today, the Czech term Hanáci is used for an ethnographic group inhabiting the Haná region.

Significant cities and places

The West Wing (season 5)

The fifth season of the American political drama television series The West Wing aired in the United States on NBC from September 24, 2003, to May 19, 2004, and consisted of 22 episodes. This was the first season with executive producer John Wells as showrunner after series creator Aaron Sorkin departed the series after the conclusion of the previous season.

Cast

The fifth season had star billing for nine major roles, all nine of these were filled by returning main cast members from the fourth season. Martin Sheen receives the "and" credit for his role as President Josiah Bartlet. The rest of the ensemble are credited alphabetically, while Channing is only credited for the episodes in which she appears

Main cast

Sif

In Norse mythology, Sif is a goddess associated with earth. Sif is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson, and in the poetry of skalds. In both the Poetic Edda and the Prose Edda, Sif is the wife of the thunder god Thor and is known for her golden hair.

In the Prose Edda, Sif is named as the mother of the goddess Þrúðr by Thor and of Ullr with a father whose name is not recorded. The Prose Edda also recounts that Sif once had her hair shorn by Loki, and that Thor forced Loki to have a golden headpiece made for Sif, resulting in not only Sif's golden tresses but also five other objects for other gods.

Scholars have proposed that Sif's hair may represent fields of golden wheat, that she may be associated with fertility, family, wedlock and/or that she is connected to rowan, and that there may be an allusion to her role or possibly her name in the Old English poem Beowulf.

Sif (disambiguation)

Sif is a Norse goddess and the wife of Thor.

Sif or SIF may also refer to:

Sif

SIF

Organizations

Silicon tetrafluoride

Silicon tetrafluoride or Tetrafluorosilane is the chemical compound with the formula SiF₄. This tetrahedral molecule is notable for having a remarkably narrow liquid range (its boiling point is only 4 °C above its melting point). It was first synthesized by John Davy in 1812.

Preparation

SiF
4 is a by-product of the production of phosphate fertilizers, resulting from the attack of HF (derived from fluorapatite protonolysis) on silicates. In the laboratory, the compound is prepared by heating BaSiF
6 above 300 °C, whereupon the solid releases volatile SiF
4, leaving a residue of BaF
2. The required BaSiF
6 is prepared by treating aqueous hexafluorosilicic acid with barium chloride. The corresponding GeF
4 is prepared analogously, except that the thermal "cracking" requires 700 °C.SiF
4 can also be created by placing silicon dioxide in hydrofluoric acid using the following equation:

Uses

This volatile compound finds limited use in microelectronics and organic synthesis.

Occurrence