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  2. Halley Research Station - Wikipedia

    en.wikipedia.org/wiki/Halley_Research_Station

    The base was established in 1956 to study the Earth's atmosphere. Measurements from Halley led to the discovery of the ozone hole in 1985. [3] The current base is the sixth in a line of structures and includes design elements intended to overcome the challenge of building on a floating ice shelf without being buried and crushed by snow.

  3. Six-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Six-dimensional_space

    A wider family are the uniform 6-polytopes, constructed from fundamental symmetry domains of reflection, each domain defined by a Coxeter group. Each uniform polytope is defined by a ringed Coxeter–Dynkin diagram. The 6-demicube is a unique polytope from the D 6 family, and 2 21 and 1 22 polytopes from the E 6 family.

  4. Thorium(IV) nitrate - Wikipedia

    en.wikipedia.org/wiki/Thorium(IV)_nitrate

    The pentahydrate Th(NO 3) 4 •5H 2 O crystallizes with clear colourless crystals [6] in the orthorhombic system. The unit cell size is a=11.191 b=22.889 c=10.579 Å. Each thorium atom is connected twice to each of four bidentate nitrate groups, and to three water molecules via their oxygen atoms. In total the thorium is eleven-coordinated.

  5. Keyboard layout - Wikipedia

    en.wikipedia.org/wiki/Keyboard_layout

    Visual layout is the arrangement of the legends (labels, markings, engravings) that appear on those keys. Functional layout is the arrangement of the key-meaning association or keyboard mapping, determined in software, of all the keys of a keyboard; it is this (rather than the legends) that determines the actual response to a key press.

  6. Sixth Army (United States) - Wikipedia

    en.wikipedia.org/wiki/Sixth_Army_(United_States)

    Sixth Army is a theater army of the United States Army. The Army service component command of United States Southern Command, its area of responsibility includes 31 countries and 15 areas of special sovereignty in Central and South America and the Caribbean.

  7. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Subbase (pavement) - Wikipedia

    en.wikipedia.org/wiki/Subbase_(pavement)

    Layers in the construction of a mortarless pavement: A.) Subgrade B.) Subbase C.) Base course D.) Paver base E.) Pavers F.) Fine-grained sand. In highway engineering, subbase is the layer of aggregate material laid on the subgrade, on which the base course layer is located. It may be omitted when there will be only foot traffic on the pavement ...

  9. Senary - Wikipedia

    en.wikipedia.org/wiki/Senary

    A senary (/ ˈ s iː n ər i, ˈ s ɛ n ər i /) numeral system (also known as base-6, heximal, or seximal) has six as its base. It has been adopted independently by a small number of cultures. Like the decimal base 10, the base is a semiprime, though it is unique as