Difference between revisions of "Horizon Node"
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=Horizon Observatory= | =Horizon Observatory= | ||
[[FILE:Hoheward-Panorama.jpg|none|border|text-bottom|1024px]] | [[FILE:Hoheward-Panorama.jpg|none|border|text-bottom|1024px]] | ||
| − | [https://de.wikipedia.org/wiki/Halde_Hoheward#Horizontobservatorium Horizon Observatory] (left) and horizontal [https://en.wikipedia.org/wiki/Sundial Sundial] with [https://en.wikipedia.org/wiki/Obelisk Obelisk] (right), [https://de.wikipedia.org/wiki/Halde_Hoheward Hoheward Spoil tip], [[:Category:Industrial | + | [https://de.wikipedia.org/wiki/Halde_Hoheward#Horizontobservatorium Horizon Observatory] (left) and horizontal [https://en.wikipedia.org/wiki/Sundial Sundial] with [https://en.wikipedia.org/wiki/Obelisk Obelisk] (right), [https://de.wikipedia.org/wiki/Halde_Hoheward Hoheward Spoil tip], [[:Category:Industrial Heritage Trail|The Industrial Heritage Trail]] <ref>360–degree [https://en.wikipedia.org/wiki/Panorama Panorama] Photo by [https://commons.wikimedia.org/wiki/User:Panofreak Panofreak], April 12, 2009, [https://de.wikipedia.org/wiki/Halde_Hoheward Hoheward Spoil tip] in [https://en.wikipedia.org/wiki/Herten Herten], [https://en.wikipedia.org/wiki/North_Rhine-Westphalia North Rhine-Westphalia], Germany, [[:Category:Industrial Heritage Trail|The Industrial Heritage Trail]] , view over the [https://en.wikipedia.org/wiki/Ruhr Ruhr area]. The observatory consists of a circular, flat surface of 88 m diameter, and a center forum lowered by 1.50 m with 35 m diameter with two arcs spanning [https://en.wikipedia.org/wiki/Meridian_%28astronomy%29 meridian] and [https://en.wikipedia.org/wiki/Celestial_equator celestial equator]. The horizon observatory is a modern version of [https://en.wikipedia.org/wiki/Prehistory prehistoric] [https://en.wikipedia.org/wiki/Stone_circle stone circles] and monuments such as [https://en.wikipedia.org/wiki/Stonehenge Stonehenge]. If the observer is located exactly in the lowered center, the plateau of the tip spreads in all directions like an artificial horizon, and with the help of bearing points the [https://en.wikipedia.org/wiki/Sunrise sunrise] and [https://en.wikipedia.org/wiki/Sunset sunset] at [https://en.wikipedia.org/wiki/Summer_solstice summer solstice], [https://en.wikipedia.org/wiki/Winter_solstice winter solstice] or [https://en.wikipedia.org/wiki/Equinox equinox] can be observed, by means of further bearing points also [https://en.wikipedia.org/wiki/Moon moon] solstices and the [https://en.wikipedia.org/wiki/Precession precession] of [https://en.wikipedia.org/wiki/Earth%27s_rotation Earth's axis] based on bearings of [https://en.wikipedia.org/wiki/Fixed_stars fixed stars]. The arcs divide the [https://en.wikipedia.org/wiki/Celestial_sphere celestial sphere] in eastern and western half as well as in [https://en.wikipedia.org/wiki/Northern_Hemisphere northern] and [https://en.wikipedia.org/wiki/Southern_Hemisphere southern hemisphere] and therefore serve as a [https://en.wikipedia.org/wiki/Solar_calendar solar calendar] at day, and at night, with the help of a [https://en.wikipedia.org/wiki/Luminous_paint self-luminous] scale as a guide of the [https://en.wikipedia.org/wiki/Night_sky night sky], [http://www.halden.ruhr/halden.html Halden im Ruhrgebiet] (German)</ref> |
=See also= | =See also= | ||
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=External Links= | =External Links= | ||
| − | * [[ | + | * [[:Category:Karl Jenkins|Karl Jenkins]] - [https://en.wikipedia.org/wiki/In_These_Stones_Horizons_Sing In These Stones Horizons Sing] (4th movement), [https://en.wikipedia.org/wiki/YouTube YouTube] Video |
: Commissioned for the opening of [https://en.wikipedia.org/wiki/Wales_Millennium_Centre Wales Millennium Centre], first performed at its opening on November 29, 2004 | : Commissioned for the opening of [https://en.wikipedia.org/wiki/Wales_Millennium_Centre Wales Millennium Centre], first performed at its opening on November 29, 2004 | ||
: {{#evu:https://www.youtube.com/watch?v=u3HTUzSnEbs|alignment=left|valignment=top}} | : {{#evu:https://www.youtube.com/watch?v=u3HTUzSnEbs|alignment=left|valignment=top}} | ||
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'''[[Node|Up one Level]]''' | '''[[Node|Up one Level]]''' | ||
| − | [[Category:Industrial | + | [[Category:Industrial Heritage Trail]] |
| + | [[Category:Karl Jenkins]] | ||
Latest revision as of 19:57, 6 August 2018
Home * Search * Node * Horizon Node
Horizon nodes are nodes at depth zero, where a quiescence search is performed. The definition is taken from the papers of Ernst A. Heinz [1] depth == 0 nodes [2]. If the horizon node is an expected Cut-Node, confirmed by the evaluated standing pat score already greater or equal than beta, the horizon node is a leaf with the lower bound score of beta (fail-hard) or the stand pat score (fail-soft). Otherwise, winning captures (or checks) may either cause a beta-cutoff or raise alpha with an exact score at PV-Nodes. At expected All-Nodes with evaluated score (far) below alpha, if no tactical move is available, or due to Delta Pruning good enough to raise alpha, those leaves return alpha (fail-hard) as an upper bound. This may also appear, if this horizon node was not a leaf, since some captures were not pruned, but tried without raising alpha.
Horizon Observatory
Horizon Observatory (left) and horizontal Sundial with Obelisk (right), Hoheward Spoil tip, The Industrial Heritage Trail [3]
See also
External Links
- Karl Jenkins - In These Stones Horizons Sing (4th movement), YouTube Video
- Commissioned for the opening of Wales Millennium Centre, first performed at its opening on November 29, 2004
References
- ↑ Ernst A. Heinz (1998). Extended futility pruning. ICCA Journal, Vol. 21, No 2, ps
- ↑ Re: simple node definitions question by Robert Hyatt, CCC, September 13, 2004
- ↑ 360–degree Panorama Photo by Panofreak, April 12, 2009, Hoheward Spoil tip in Herten, North Rhine-Westphalia, Germany, The Industrial Heritage Trail , view over the Ruhr area. The observatory consists of a circular, flat surface of 88 m diameter, and a center forum lowered by 1.50 m with 35 m diameter with two arcs spanning meridian and celestial equator. The horizon observatory is a modern version of prehistoric stone circles and monuments such as Stonehenge. If the observer is located exactly in the lowered center, the plateau of the tip spreads in all directions like an artificial horizon, and with the help of bearing points the sunrise and sunset at summer solstice, winter solstice or equinox can be observed, by means of further bearing points also moon solstices and the precession of Earth's axis based on bearings of fixed stars. The arcs divide the celestial sphere in eastern and western half as well as in northern and southern hemisphere and therefore serve as a solar calendar at day, and at night, with the help of a self-luminous scale as a guide of the night sky, Halden im Ruhrgebiet (German)
