Difference between revisions of "Twin bees shuttle"
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The '''twin bees shuttle''' (or '''B-heptomino shuttle'''<ref>{{CiteLexicon|lex_b.htm#bheptominoshuttle|name=B-heptomino shuttle}}</ref>) was found by [[Bill Gosper]] in | The '''twin bees shuttle''' (or '''B-heptomino shuttle'''<ref>{{CiteLexicon|lex_b.htm#bheptominoshuttle|name=B-heptomino shuttle}}</ref>) was found by [[Bill Gosper]] in {{year|1971}}.<ref>{{CiteHickersonOscillators}}</ref> Before the [[Snark]] was discovered, it and its variants were the basis of all known {{period|46}} [[oscillator]]s (the version at right being the smallest based on its minimum population of 28 cells), and until the discovery of [[Tanner's p46]], the basis of all known true period 46 [[gun]]s including the second known basic gun, [[new gun 1]]. The simplest such gun is the [[bi-gun]], in which two twin bees shuttles collide with each other head-on (much like the collision of two [[queen bee]]s in the [[Gosper glider gun]]). | ||
There are numerous ways to stabilize the ends, two of which are shown to the right; a stabilization by two [[block]]s on one end and one block on the other end. This 3-block stabilization produces the smallest possible shuttle in terms of its minimum population. This latter method produces a very large [[spark]] which is useful in a number of ways. For example, the large spark can be used to convert an incoming [[glider]] into a [[lightweight spaceship]], as illustrated by [[double X]]. The image below shows [[David Bell]]'s double [[block]] reaction (on the left), which results in a shorter but wider shuttle than usual, as well as [[Heinrich Koenig]]'s [[hat]] stabilization (on the right). The two-block shuttle, however, has a cheaper [[glider synthesis]], costing only {{gliders|7|brief}} [[glider]]s instead of 8.<ref>{{citeCatagolue|title=cis-twin-bees-shuttle|page=object/xp46_330279cx1aad3y833zx4e93x855bc/b3s23|accessdate=May 24, 2019}}</ref> | There are numerous ways to stabilize the ends, two of which are shown to the right; a stabilization by two [[block]]s on one end and one block on the other end. This 3-block stabilization produces the smallest possible shuttle in terms of its minimum population. This latter method produces a very large [[spark]] which is useful in a number of ways. For example, the large spark can be used to convert an incoming [[glider]] into a [[lightweight spaceship]], as illustrated by [[double X]]. The image below shows [[David Bell]]'s double [[block]] reaction (on the left), which results in a shorter but wider shuttle than usual, as well as [[Heinrich Koenig]]'s [[hat]] stabilization (on the right). The two-block shuttle, however, has a cheaper [[glider synthesis]], costing only {{gliders|7|brief}} [[glider]]s instead of 8.<ref>{{citeCatagolue|title=cis-twin-bees-shuttle|page=object/xp46_330279cx1aad3y833zx4e93x855bc/b3s23|accessdate=May 24, 2019}}</ref> | ||
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Interactions based on the twin bees shuttle are numerous and can have many applications. Some notable reactions are period 46 oscillators that can directly reflect gliders, lightweight spaceships, and [[middleweight spaceship]]s, as well as convert gliders to lightweight spaceships and lightweight spaceships to middleweight spaceships. | Interactions based on the twin bees shuttle are numerous and can have many applications. Some notable reactions are period 46 oscillators that can directly reflect gliders, lightweight spaceships, and [[middleweight spaceship]]s, as well as convert gliders to lightweight spaceships and lightweight spaceships to middleweight spaceships. | ||
The period-92 '''do-see-do''' reaction was found by [[David Bell]] in | The period-92 '''do-see-do''' reaction was found by [[David Bell]] in {{year|1996}}.<ref>{{CiteLexicon|lex_d.htm#do-see-do|name=Do-see-do}}</ref> It is a 90 degree glider reflection reaction in which the gliders appear to circle around each other. | ||
==[[List of common oscillators|Commonness]]== | ==[[List of common oscillators|Commonness]]== | ||
On [[Catagolue]], it is the most common period 46 oscillator, with all natural oscillators of that period featuring it in some form.<ref>{{citeCatagolueStats|October 27, 2018}}</ref> | On [[Catagolue]], it is the most common period 46 oscillator, with all natural oscillators of that period featuring it in some form.<ref>{{citeCatagolueStats|October 27, 2018}}</ref> | ||
A four-fold version of this oscillator first appeared [[semi-natural]]ly in December {{year|2014}} in a [[soup]] found by [[Richard Schank]].<ref name="post15115" /> A [[monomer]]ized version, specifically the ''cis'' [[isomer]], later appeared in an [[asymmetric]] soup found by [[Brett Berger]] on April 16, {{year|2015}}.<ref name="post18729" /> The ''trans'' version first appeared on May 7 in a soup also found by Berger,<ref name="post19439" /> and the three-block version first appeared on October 15 in a soup found by [[Tomas Rokicki]].<ref name="post23844" /> Other three-block versions, with one of the blocks placed further away, were found by [[Adam P. Goucher]] in July and September {{year|2016}}.<ref name="post33264" /><ref name="post36138" /> | |||
==Image gallery== | ==Image gallery== | ||
{| | {| | ||
|- | |- | ||
|[[ | {{EmbedViewer | ||
|viewerconfig = #C [[ GPS 23 LOOP 46 ZOOM 4 ]] | |||
|pname = twinbeevariants | |||
|caption = Some additional ways to stabilize the twin bees shuttle;<br>the top-left variant is used in [[centinal]]<br> | |||
|position = left | |||
}} | |||
|[[Image:Twinbeesshuttleinteractions.png|framed|left|Several interactions involving the twin bees shuttle<br/>{{JavaRLE|twinbeesshuttleinteractions}}]] | |[[Image:Twinbeesshuttleinteractions.png|framed|left|Several interactions involving the twin bees shuttle<br/>{{JavaRLE|twinbeesshuttleinteractions}}]] | ||
|[[Image:doseedo.png|framed|left|Do-see-do<br/>{{JavaRLE|doseedo|brief}}]] | |[[Image:doseedo.png|framed|left|Do-see-do<br/>{{JavaRLE|doseedo|brief}}]] | ||
|} | |} | ||
==See also== | ==See also== | ||
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==References== | ==References== | ||
<references/> | <references> | ||
<ref name="post15115">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Soup search results | |||
|p = 15115 | |||
|author = Richard Schank | |||
|date = December 19, 2014 | |||
}}</ref> | |||
<ref name="post18729">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Soup search results | |||
|p = 18729 | |||
|author = Matthias Merzenich | |||
|date = April 16, 2015 | |||
}}</ref> | |||
<ref name="post19439">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Soup search results | |||
|p = 19439 | |||
|author = gameoflifeboy | |||
|date = May 7, 2015 | |||
}}</ref> | |||
<ref name="post23844">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Soup search results | |||
|p = 23844 | |||
|author = gameoflifeboy | |||
|date = October 15, 2015 | |||
}}</ref> | |||
<ref name="post33264">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Soup search results | |||
|p = 33264 | |||
|author = Apple Bottom | |||
|date = July 16, 2016 | |||
}}</ref> | |||
<ref name="post36138">{{LinkForumThread | |||
|format = ref | |||
|title = Re: Soup search results | |||
|p = 36138 | |||
|author = Apple Bottom | |||
|date = September 26, 2016 | |||
}}</ref> | |||
</references> | |||
==External links== | ==External links== | ||
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{{LinkCatagolue|xp46_330279cx1aad3yd66zx4e93x855bcy8cc|patternname=xp46_330279cx1aad3yd66zx4e93x855bcy8cc}} | {{LinkCatagolue|xp46_330279cx1aad3yd66zx4e93x855bcy8cc|patternname=xp46_330279cx1aad3yd66zx4e93x855bcy8cc}} | ||
{{Sparker|p=46|type=domino|strength=strong|type2=dot}} | |||
__NOTOC__ | __NOTOC__ |
Revision as of 19:57, 8 April 2020
Twin bees shuttle | |||||||||
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Pattern type | Oscillator | ||||||||
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Oscillator type | Shuttle | ||||||||
Number of cells | 28 | ||||||||
Bounding box | 32 × 13 | ||||||||
Frequency class | 38.2 | ||||||||
Period | 46 | ||||||||
Mod | 46 | ||||||||
Heat | 32.5 | ||||||||
Volatility | 0.98 | ||||||||
Strict volatility | 0.94 | ||||||||
Discovered by | Bill Gosper | ||||||||
Year of discovery | 1971 | ||||||||
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The twin bees shuttle (or B-heptomino shuttle[1]) was found by Bill Gosper in 1971.[2] Before the Snark was discovered, it and its variants were the basis of all known period-46 oscillators (the version at right being the smallest based on its minimum population of 28 cells), and until the discovery of Tanner's p46, the basis of all known true period 46 guns including the second known basic gun, new gun 1. The simplest such gun is the bi-gun, in which two twin bees shuttles collide with each other head-on (much like the collision of two queen bees in the Gosper glider gun).
There are numerous ways to stabilize the ends, two of which are shown to the right; a stabilization by two blocks on one end and one block on the other end. This 3-block stabilization produces the smallest possible shuttle in terms of its minimum population. This latter method produces a very large spark which is useful in a number of ways. For example, the large spark can be used to convert an incoming glider into a lightweight spaceship, as illustrated by double X. The image below shows David Bell's double block reaction (on the left), which results in a shorter but wider shuttle than usual, as well as Heinrich Koenig's hat stabilization (on the right). The two-block shuttle, however, has a cheaper glider synthesis, costing only 7 gliders instead of 8.[3]
Interactions based on the twin bees shuttle are numerous and can have many applications. Some notable reactions are period 46 oscillators that can directly reflect gliders, lightweight spaceships, and middleweight spaceships, as well as convert gliders to lightweight spaceships and lightweight spaceships to middleweight spaceships.
The period-92 do-see-do reaction was found by David Bell in 1996.[4] It is a 90 degree glider reflection reaction in which the gliders appear to circle around each other.
Commonness
On Catagolue, it is the most common period 46 oscillator, with all natural oscillators of that period featuring it in some form.[5]
A four-fold version of this oscillator first appeared semi-naturally in December 2014 in a soup found by Richard Schank.[6] A monomerized version, specifically the cis isomer, later appeared in an asymmetric soup found by Brett Berger on April 16, 2015.[7] The trans version first appeared on May 7 in a soup also found by Berger,[8] and the three-block version first appeared on October 15 in a soup found by Tomas Rokicki.[9] Other three-block versions, with one of the blocks placed further away, were found by Adam P. Goucher in July and September 2016.[10][11]
Image gallery
See also
References
- ↑ "B-heptomino shuttle". The Life Lexicon. Stephen Silver.
- ↑ Dean Hickerson's oscillator stamp collection.
- ↑ Adam P. Goucher. "cis-twin-bees-shuttle". Catagolue. Retrieved on May 24, 2019.
- ↑ "Do-see-do". The Life Lexicon. Stephen Silver.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on October 27, 2018.
- ↑ Richard Schank (December 19, 2014). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Matthias Merzenich (April 16, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ gameoflifeboy (May 7, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ gameoflifeboy (October 15, 2015). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Apple Bottom (July 16, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
- ↑ Apple Bottom (September 26, 2016). Re: Soup search results (discussion thread) at the ConwayLife.com forums
External links
- Twin bees shuttle at the Life Lexicon
- 32P46.1 at Heinrich Koenig's Game of Life Object Catalogs
Catagolue
- Patterns
- Patterns with Catagolue frequency class 38
- Natural periodic objects
- Oscillators with 28 cells
- Periodic objects with minimum population 28
- Patterns with 28 cells
- Patterns found by Bill Gosper
- Patterns found in 1971
- Patterns that can be constructed with 8 gliders
- Oscillators
- Shuttles
- Oscillators with period 46
- Oscillators with mod 46
- Oscillators with heat 32
- Oscillators with volatility 0.98
- Oscillators with strict volatility 0.94
- Sparkers
- Sparkers with period 46
- Domino sparkers
- Strong sparkers
- Dot sparkers