Queen bee shuttle: Difference between revisions
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The '''queen bee shuttle''' (or '''basic shuttle'''<ref>{{CiteLexicon|file=lex_b.htm#basicshuttle|name=Basic shuttle|accessdate=June 11, 2009}}</ref>) is a | The '''queen bee shuttle''' (or '''basic shuttle'''<ref>{{CiteLexicon|file=lex_b.htm#basicshuttle|name=Basic shuttle|accessdate=June 11, 2009}}</ref>) is a {{period|30}} [[shuttle]] [[oscillator]] in which a [[queen bee]] travels back and forth between two stabilizing ends. The shuttles were originally stabilized against one another in a square of eight shuttles, though there are now a number of known ways to stabilize the ends. Some simpler methods are shown here involving [[block]]s; for a method involving one or two [[eater 1]]'s see [[buckaroo]]. The queen bee shuttle is the basis of all known true period 30 [[gun]]s (including the famous [[Gosper glider gun]]). It was found by [[Bill Gosper]] in {{year|1970}} and was the first period 30 oscillator to be found. It is the smallest known oscillator with period greater than 15.<ref>{{cite web|url=http://www.pentadecathlon.com/objects/class2/class2.php?part=1 |title=Class 2 Objects Catalog - Oscillators |accessdate=April 8, 2009}}</ref> | ||
It produces a spark at the blocks that can be used to rephrase a [[blinker]]; two must be used to make a functioning oscillator from this reaction to prevent formation of a deadly traffic light. | It produces a spark at the blocks that can be used to rephrase a [[blinker]]; two must be used to make a functioning oscillator from this reaction to prevent formation of a deadly traffic light. | ||
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==Variations== | ==Variations== | ||
The '''queen bee loop''' (or '''ouroboros bees'''), another form of the queen bee shuttle that was found in 1970 (also by Bill Gosper), is a closed loop made of four queen bees that clean up each other's [[beehive|beehives]]. It was forgotten about in many sources and independently rediscovered in | The '''queen bee loop''' (or '''ouroboros bees'''), another form of the queen bee shuttle that was found in 1970 (also by Bill Gosper), is a closed loop made of four queen bees that clean up each other's [[beehive|beehives]]. It was forgotten about in many sources and independently rediscovered in {{year|2008}} by [[Nicolay Beluchenko]].<ref>{{Cite web|url=http://pentadecathlon.com/lifeNews/2008/11/new_small_period_oscillators_2.html|title=New Small Period Oscillators|accessdate=June 3, 2009|date=November 23, 2008|author=H. Koenig|publisher=Game of Life News}}</ref> It is also possible to create a partial loop oscillator consisting of two or three queen bees by removing one or two of the queen bees in the loop and placing two stabilizing blocks appropriately. | ||
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|[[Image:Queenbee4.png|framed|left|Queen bee shuttle predecessor made up of a [[pi-heptomino]], two [[blinker]]s and two blocks. Found by Gosper in April | |[[Image:Queenbee4.png|framed|left|Queen bee shuttle predecessor made up of a [[pi-heptomino]], two [[blinker]]s and two blocks. Found by Gosper in April {{year|1992}}<br />{{JavaRLE|queenbeeshuttlepipredecessor|brief}}]] | ||
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{{Symmetry|osc=turn180}} | {{Symmetry|osc=turn180}} | ||
{{Sparker|p=30|type=dot|strength=strong}} | |||
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Revision as of 01:16, 27 December 2019
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| Pattern type | Oscillator | ||||||||
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| Oscillator type | Shuttle | ||||||||
| Family | Queen bee shuttle | ||||||||
| Number of cells | 20 | ||||||||
| Bounding box | 22 × 7 | ||||||||
| Frequency class | 28.4 | ||||||||
| Period | 30 (mod: 15) | ||||||||
| Heat | 17.9 | ||||||||
| Volatility | 0.96 | 0.96 | ||||||||
| Kinetic symmetry | Unspecified | ||||||||
| Discovered by | Bill Gosper | ||||||||
| Year of discovery | 1970 | ||||||||
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The queen bee shuttle (or basic shuttle[1]) is a period-30 shuttle oscillator in which a queen bee travels back and forth between two stabilizing ends. The shuttles were originally stabilized against one another in a square of eight shuttles, though there are now a number of known ways to stabilize the ends. Some simpler methods are shown here involving blocks; for a method involving one or two eater 1's see buckaroo. The queen bee shuttle is the basis of all known true period 30 guns (including the famous Gosper glider gun). It was found by Bill Gosper in 1970 and was the first period 30 oscillator to be found. It is the smallest known oscillator with period greater than 15.[2]
It produces a spark at the blocks that can be used to rephrase a blinker; two must be used to make a functioning oscillator from this reaction to prevent formation of a deadly traffic light.
The cis-queen bee shuttle (shown in the infobox) and the trans-queen bee shuttle (by shifting one block by one cell) are about the 18th and 19th most common naturally-occurring oscillators in Achim Flammenkamp's census.[3] On Catagolue, it is the most common period 30 oscillator, with all other natural oscillators of that period featuring it in some form.[4]
Variations
The queen bee loop (or ouroboros bees), another form of the queen bee shuttle that was found in 1970 (also by Bill Gosper), is a closed loop made of four queen bees that clean up each other's beehives. It was forgotten about in many sources and independently rediscovered in 2008 by Nicolay Beluchenko.[5] It is also possible to create a partial loop oscillator consisting of two or three queen bees by removing one or two of the queen bees in the loop and placing two stabilizing blocks appropriately.
 RLE: here |
 RLE: here |
Image gallery
 RLE: here |
References
- ↑ "Basic shuttle". The Life Lexicon. Stephen Silver. Retrieved on June 11, 2009.
- ↑ "Class 2 Objects Catalog - Oscillators". Retrieved on April 8, 2009.
- ↑ Achim Flammenkamp (September 7, 2004). "Most seen natural occurring ash objects in Game of Life". Retrieved on January 15, 2009.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on October 27, 2018.
- ↑ H. Koenig (November 23, 2008). "New Small Period Oscillators". Game of Life News. Retrieved on June 3, 2009.
External links
- Queen bee shuttle at the Life Lexicon
- 20P30.2 at Heinrich Koenig's Game of Life Object Catalogs
Categories:
- Patterns
- Patterns with Catagolue frequency class 28
- Natural periodic objects
- Oscillators with 20 cells
- Periodic objects with minimum population 20
- Patterns with 20 cells
- Patterns found by Bill Gosper
- Patterns found in 1970
- Patterns that can be constructed with 6 gliders
- Oscillators
- Queen bee shuttle variants
- Shuttles
- Oscillators with period 30
- Oscillators with mod 15
- Oscillators with heat 17
- Oscillators with volatility 0.96
- Oscillators with strict volatility 0.96
- Non-flipping oscillators that turn 180 degrees
- Sparkers
- Sparkers with period 30
- Dot sparkers
- Strong sparkers