Emu: Difference between revisions
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{{Glossary}} | {{Glossary}} | ||
An '''emu''' is a [[Herschel loop]], which does not emit [[glider]]s. Emus | An '''emu''' is a [[Herschel loop]], which does not emit [[glider]]s. Emus have been constructed for [[period]] 52<ref>{{cite web|url=http://www.conwaylife.com/forums/viewtopic.php?f=2&t=1437&start=550#p58837|title=Re: Oscillator Discussion Thread|author=Adam P. Goucher|date=March 3, 2018|accessdate=March 3, 2018}}</ref> and for periods 54 and higher (the first few are [[oscillator]]-assisted). [[Quetzal]]s have been constructed for periods 54 to 61. | ||
== Etymology == | == Etymology == | ||
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== Emus as reflectors == | == Emus as reflectors == | ||
Emus can be used to reflect gliders in | Emus can be used to reflect gliders in a variety of ways. [[Adam P. Goucher]] (with help from [[Jason Summers]]) exploited this property to construct the first [[Period-59_glider_gun|period-59 gun]]. Unfortunately, that method does not generalise to the remaining emu-only periods, since it uses a special p59+15n reaction based on [[David Buckingham]]'s [[P44_pi-heptomino_hassler|p44 oscillator]]. | ||
== External links == | == External links == | ||
{{LinkLexicon|lex_e.htm#emu}} | {{LinkLexicon|lex_e.htm#emu}} | ||
== References == | |||
<references/> | |||
Revision as of 07:36, 4 April 2018
An emu is a Herschel loop, which does not emit gliders. Emus have been constructed for period 52[1] and for periods 54 and higher (the first few are oscillator-assisted). Quetzals have been constructed for periods 54 to 61.
Etymology
The name derives from the fact that they are flightless (incapable of emitting gliders). This term was coined by Dietrich Leithner.
Emus as reflectors
Emus can be used to reflect gliders in a variety of ways. Adam P. Goucher (with help from Jason Summers) exploited this property to construct the first period-59 gun. Unfortunately, that method does not generalise to the remaining emu-only periods, since it uses a special p59+15n reaction based on David Buckingham's p44 oscillator.
External links
- Emu at the Life Lexicon
References
- ↑ Adam P. Goucher (March 3, 2018). "Re: Oscillator Discussion Thread". Retrieved on March 3, 2018.