https://www.explainxkcd.com/wiki/api.php?action=feedcontributions&user=108.162.254.85&feedformat=atomexplain xkcd - User contributions [en]2024-03-28T08:12:17ZUser contributionsMediaWiki 1.30.0https://www.explainxkcd.com/wiki/index.php?title=1531:_The_BDLPSWDKS_Effect&diff=945331531: The BDLPSWDKS Effect2015-05-29T15:59:51Z<p>108.162.254.85: /* Explanation */ several explanations were wrong</p>
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<div>{{comic<br />
| number = 1531<br />
| date = May 29, 2015<br />
| title = The BDLPSWDKS Effect<br />
| image = the bdlpswdks effect.png<br />
| titletext = This well-known effect has of course been replicated in countless experiments.<br />
}}<br />
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==Explanation==<br />
{{incomplete|New page}}<br />
The BDLPSWDKS Effect in the title is an {{w|acronym}} for Bernoulli-Doppler-Leidenfrost-Peltzman-Sapir-Whorf-Dunning-Kruger-Stroop Effect, as explained by [[Ponytail]] in the comic. She stands in front of a slide that shows [[Cueball]] being subjected to this effect.<br />
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The effect mentioned appears to be a mashup of seven scientific principles (with nine scientists names included) from different scientific fields, with elements from each principle appearing in the resulting description of the effect:<br />
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The {{w|Leidenfrost effect}} refers to how liquid will produce an insulating vapor layer when in near contact with an extremely hot surface, causing it to hover over said surface. This is referenced by the firetruck lifting off on a layer of superheated gas.<br />
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{{w|Bernoulli's principle}} in fluid dynamics (also mentioned in [[803: Airfoil]]) states that an increase in the speed of a fluid with certain properties occurs simultaneously with a decrease in pressure or a decrease in the fluid's potential energy. This is referenced by the lifted firetruck hurtling rather than just speeding.<!-- lift is already provided by the Leidenfrost effect, the Bernoulli effect would lead to the truck going higher and higher, eventually flying over your head --><br />
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The {{w|Doppler effect}} in physics refers to the change in a wave's frequency for an observer moving relative to its source. Sound from the oncoming firetruck increases in pitch. In tonal languages, changes in pitch change the meaning, making it harder for Ponytail to understand the word screamed by the driver.<br />
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The {{w|Peltzman effect}} refers to how regulations intended to increase safety are ineffective or counterproductive. Red means stop and green means go, so yelling "red" would induce the (usually) counterproductive behavior of starting to walk more, rather than less.<br />
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The {{w|Sapir–Whorf hypothesis}} states that a person's world view and cognitive processes are affected by the structure of the language the person speaks. Speaking a language without a word for "firefighter" would conceivably not contain a word for "firetruck" either, thus avoiding the association with danger firetrucks have, slowing down Ponytail's reaction.<br />
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The {{w|Dunning–Kruger effect}} refers to unskilled people mistakenly perceiving themselves as more skilled than they really are, while skilled people underestimate their own abilities. Obviously, if Ponytail isn't fluent in the language, s/he'd take more time to process "green", as opposed to "red" in a well-understood language.<br />
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The {{w|Stroop effect}} refers to the phenomenon in which it is easier to name the color of the ink in which a word is written when the word refers to the same color as the ink than when the word refers to a different color. Firetrucks are red, this suggests that the driver shouting '''<span style="color:red">RED</span>''' would get a faster response than the driver shouting '''<span style="color:red">GREEN</span>'''.<br />
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Usually, for an effect to be considered real, the scientific method requires the effect to be replicated by different experimenters in different times and places. It is hard to imagine several scientists in different parts of the world creating the setup to replicate this effect; however the title text mentions it has been done countless times.<br />
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Furthermore, the opportunity of publishing this comic strip may (or may not) be related to the recently issued sequels of franchises such as `Mad Max` and `Carmageddon`, where it's not unusual to find heavy wheeled vehicles trampling pedestrians for the lulz.<br />
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==Transcript==<br />
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:[Ponytail stands next to a screen displaying a firetruck hurtling toward Cueball on what appears to be a layer of gas.]<br />
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:Ponytail: The Bernoulli-Doppler-Leidenfrost-Peltzman-Sapir-Whorf-Dunning-Kruger-Stroop Effect states that if a speeding fire truck lifts off and hurtles towards you on a layer of superheated gas, you'll dive out of the way faster if the driver screams '''''"red!"''''' in a '''''non'''''-tonal language that '''''has''''' a word for "firefighter" than if they scream '''''"green!"''''' in a '''''tonal''''' language with '''''no''''' word for "firefighter" which you '''''think''''' you're fluent in but '''''aren't'''''.<br />
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{{comic discussion}}<br />
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[[Category:Comics featuring Ponytail]]<br />
[[Category:Comics featuring Cueball]]<br />
[[Category:Science]]</div>108.162.254.85https://www.explainxkcd.com/wiki/index.php?title=Talk:1475:_Technically&diff=83016Talk:1475: Technically2015-01-19T17:40:32Z<p>108.162.254.85: </p>
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<div>Technically, it's poor form and rude to ignore someone based on *Clicks Random page* [[User:Xseo|Xseo]] ([[User talk:Xseo|talk]]) 13:45, 19 January 2015 (UTC)<br />
It's also possible that Cueball is purposefully inviting another "technically" sentence by stating he's looking at a bug, since it's unlikely he's looking at a member of the order Hemiptera. 14:21, 19 January 2015 (UTC)<br />
Well, it seems that White hat is responding to being asked if he is taking drugs, and technically, any food item that is consumed only for its taste or other effect on the body and mind, such as chocolate, could be argued to be a drug by a combination of both definitions given in the explanation. [[Special:Contributions/108.162.254.85|108.162.254.85]] 17:39, 19 January 2015 (UTC)</div>108.162.254.85https://www.explainxkcd.com/wiki/index.php?title=Talk:1475:_Technically&diff=83015Talk:1475: Technically2015-01-19T17:39:11Z<p>108.162.254.85: </p>
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<div>Technically, it's poor form and rude to ignore someone based on *Clicks Random page* [[User:Xseo|Xseo]] ([[User talk:Xseo|talk]]) 13:45, 19 January 2015 (UTC)<br />
It's also possible that Cueball is purposefully inviting another "technically" sentence by stating he's looking at a bug, since it's unlikely he's looking at a member of the order Hemiptera. 14:21, 19 January 2015 (UTC)<br />
Well, it seems that White hat is responding to being asked if he is taking drugs, and technically, any food item that is eaten only for it's taste or other effect on the body and mind, such as chocolate, could be argued to be a drug by a combination of both definitions given in the explanation. [[Special:Contributions/108.162.254.85|108.162.254.85]] 17:39, 19 January 2015 (UTC)</div>108.162.254.85https://www.explainxkcd.com/wiki/index.php?title=Talk:492:_Scrabble&diff=67160Talk:492: Scrabble2014-05-12T14:48:32Z<p>108.162.254.85: </p>
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<div>Does anyone know the points for "Ostrich", "Historic", and "Coistril"? I know the game but I don't have it at home.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 18:25, 24 June 2013 (UTC)<br />
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:Not sure what double word type modifiers they have but here are the base scores:<br />
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clitoris 10 + 50<br />
coistril 10<br />
ostrich 12<br />
historic 13<br />
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:Choosing '''historic''' would be the best family friendly option, but is a far less desirable choice. [[Special:Contributions/184.66.160.91|184.66.160.91]] 05:43, 7 July 2013 (UTC)<br />
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:: The only placement for ''historic'' would get it onto the triple word score with one doubled letter, making 42. Still nowhere near ''coistril'' or ''clitoris'', though (which can both get the 50 point bonus and the double letter score for the C). [[Special:Contributions/94.13.166.227|94.13.166.227]] 21:25, 9 July 2013 (UTC)<br />
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Please do a separate post and do not destroy the former discussions.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 22:49, 5 September 2013 (UTC)<br />
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Update by 67.0.215.76:<br />
clitoris 60<br />
coistril 60<br />
ostrich 12<br />
historic 42<br />
:{{unsigned ip|67.0.215.76}}<br />
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:The best option would be ''lictors'' and ''hic'', scoring 71 points.<br />
[[Special:Contributions/108.162.254.85|108.162.254.85]] 14:48, 12 May 2014 (UTC)</div>108.162.254.85https://www.explainxkcd.com/wiki/index.php?title=Talk:126:_Red_Spiders_Cometh&diff=59873Talk:126: Red Spiders Cometh2014-02-12T21:07:37Z<p>108.162.254.85: </p>
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<div>Does anyone else think that the red spiders are supposed to be revealed as unexpectedly huge in this entry of the Red Spiders series, and that's to what the "Uh-oh" in the title text refers? That is, the humans in "[[Counter-Red_Spiders|Counter-Red Spiders]]" thought they could fight the red spiders, but the perspective in "Red Spiders Cometh" reveals the red spiders to be building-sized rather than person-sized? ...Or am I probably just over-thinking this, and the spiders' blocks are curving down from the viewer toward the city, resulting in a false apparent size, and the "Uh-oh" just refers to their arrival? Because it really seems to me that 1: the spiders are on a much larger scale than humans, and 2: this is a troubling revelation as of "Red Spiders Cometh". [[User:JET73L|JET73L]] ([[User talk:JET73L|talk]]) 07:21, 10 November 2012 (UTC)<br />
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I imagined them to be human sized. Still scary and formidable prompting the same title response. I would love to see the author do another Red Spiders comic. I want to see the fight between them.[[Special:Contributions/72.193.184.110|72.193.184.110]] 07:02, 19 May 2013 (UTC)<br />
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there's no way to tell what the size of the spiders is. the perspective has the spiders closer to the observer (us) than the buildings, so they might actually be any size (depending on how close they are).</div>108.162.254.85