explain xkcd - User contributions [en]

Talk:2461: 90's Kid Space Program

2021-05-10T22:22:19Z

Piano:

While searching for popper toys in action, I found a figure in a scientific paper. Not sure if it would belong on this page. https://www.researchgate.net/publication/326439672_Dynamics_of_viscoelastic_snap-through#pf2 [[User:Pgn674|Pgn674]] ([[User talk:Pgn674|talk]]) 20:15, 10 May 2021 (UTC)

Isn't it also allusion to Kerbal Space Program game? The ship in picture looks similar to game's stock crafts. --[[Special:Contributions/162.158.91.249|162.158.91.249]] 21:05, 10 May 2021 (UTC)
Possibly? The girders and the capsule look similar, but the green bit looks a little like a Project Orion pusher plate to me. (Or maybe I just like Project Orion too much). [[Special:Contributions/141.101.99.229|141.101.99.229]] 21:07, 10 May 2021 (UTC)

Agree on the Kerbal. Note the KSP in "Kid Space Program". I also thought it had a nod towards Project Orion pusher plate. On an unrelated but fun note: Oxford science blog discusses the mathematics that describe jumping popper snap-through: https://www.ox.ac.uk/news/science-blog/how-do-jumping-popper-toys-work.
[[User:Tomb|Tomb]] ([[User talk:Tomb|talk]]) 21:40, 10 May 2021 (UTC)

The title text may refer to the way that NASA seems stuck in their ways and not willing to innovate, i.e. living in the past. [[Special:Contributions/162.158.91.249|162.158.91.249]] 21:13, 10 May 2021 (UTC)

I agree with the above suggestion that Kerbal Space Program is part of the joke, KSP is to iconic a acronym for Munroe to ignore, plus, he has mentioned it in other strips.
:Or even "too iconic an acronym". [[Special:Contributions/198.41.238.106|198.41.238.106]] 21:48, 10 May 2021 (UTC)

Is today some sort of special "90's day"? SMBC has a 90s-themed comic as well.[[User:Account|Account]] ([[User talk:Account|talk]]) 21:26, 10 May 2021 (UTC)
: Per http://www.holidays-and-observances.com/may-10.html, it is not. [[User:Piano|Piano]] ([[User talk:Piano|talk]]) 22:22, 10 May 2021 (UTC)

2450: Post Vaccine Social Scheduling

2021-04-15T20:58:18Z

Piano: Changed created by "a UNVACCINATED MOVIEGOER" to "an UNVACCINATED MOVIEGOER" for...reasons.

{{comic
| number = 2450
| date = April 14, 2021
| title = Post Vaccine Social Scheduling
| image = post_vaccine_social_scheduling.png
| titletext = As if these problems weren't NP-hard enough.
}}

==Explanation==
{{incomplete|Created by an UNVACCINATED MOVIEGOER. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}
The comic shows a timeline of a multitude of (presumably) friends and acquaintances getting their two doses of vaccine. Due to the CDC-recommended delay between shots, as well as few weeks needed to build antibodies from the second shot, planning get-togethers in advance becomes complicated by who is free to meet, or not yet.

The diagram is some form of Scheduling Diagram, maybe akin to a {{w|Gantt chart}}, which helps to coordinate the status of several individual 'processes' (personal vaccination schedules) and demonstrate where dependent activities (meet-ups) are mutually possible.

Eventually, everyone can start getting together, but during the time where some people have only received one dose, or neither dose, or their second dose recently, the scheduling is complicated. The complication is increased by the fact that people who have received one or two doses of vaccine, but haven't gone through the whole waiting period, can be expected to have some protection, but possibly not full protection (as represented by the dashed line). In that case, there's the added question of how important it is that the person be at an event, and how much risk the people involved are willing to tolerate. This may be the reason for the "movie" set, in which all participants will have received both doses, but one will not have completed the final waiting period.

The title text references NP-hardness, a theme that has come up in past comics. {{w|NP-hardness}} describes a particular level of computational difficulty. Scheduling problems are normally NP-hard. But when extra challenges such as having to deal with whether or not people are vaccinated they become even more difficult.

In this case though, {{w|Critical Path}} dependencies seem trivial enough. Events (vertical lozanges across the dot-marked timelines of those included) are trivial to validate as possible for those selected to attend. Fixed events in time can be scanned to show all those allowed to participate at that moment. Movable events can be slid around until (enough of) those hoped to be included are 'valid'. Complications may arise for those whose presence relies upon [[2441|the status of others]] potentially attending, or the need to maintain time between two events (in either order) with part-shared attendees as a precautionary 'cool-down' isolation. It is not obvious that either of these issues factor in, any more than basic scheduling conflicts would.

The third person being scheduled for a movie before being fully vaccinated may be a direct reference to [[2441: IMDb Vaccines]], discussing the number of people that needs to be vaccinated to record a particular scene. Other than each line's identifying portrait (which are not of the Throne Room characters) no explicit age/vulnerability information is given to justify this, presumably the chart's users are aware of the specifics.

CDC guidelines permit vaccinated individuals to visit inside a home or private setting without a mask with one household of unvaccinated people who are not at risk for severe illness. Therefore the movie gathering conforms to CDC recommendations provided that the single unvaccinated person is not at increased risk of severe illness and the movie is in a home or private setting.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
[From top to bottom, there are eleven people standing on the left side of the image: Danish, Cueball #1, Hairbun, Black Hat, Ponytail, Science Girl, White Hat, Hairy, Blondie, Cueball #2, and Megan, with even-numbered characters standing slightly further to the left. Each character’s first and second doses of the vaccine are labelled ① and ②, respectively. The time before each character’s first dose is drawn with a grey solid line; the time between their first dose and after they are fully vaccinated (two weeks after their second dose) is drawn with a grey dashed line; and the time after they are fully vaccinated is drawn with a black solid line. Black Hat, Science Girl, Blondie, Cueball #2, and Megan have all received their first doses prior to the comic’s time frame. Social activities are drawn with a ellipse around the top and bottom members, and each participating character is identified with a large filled-in circle on their timeline. The ellipses are labelled:]

DINNER GAMES MOVIE BIRTHDAY DINNER CABIN

[The events that happen, in chronological order (from left to right), are:

* Cueball #1 receives his first dose;
* Blondie receives her second dose;
* Ponytail receives her first dose;
* Hairy receives his first dose;
* White Hat receives his first dose;
* Danish receives her first dose;
* Black Hat receives his second dose;
* Blondie is fully vaccinated;
* Science Girl receives her second dose;
* Cueball #2 receives his second dose;
* Megan receives her second dose;
* Hairbun receives her first dose (erroneously labelled as ②);
* Ponytail receives her second dose;
* Black Hat is fully vaccinated;
* Black Hat and Blondie go to dinner;
* Danish receives her second dose;
* Cueball #1 receives his second dose;
* Science Girl is fully vaccinated;
* Cueball #2 is fully vaccinated;
* Megan is fully vaccinated;
* Hairy receives his second dose;
* White Hat receives his second dose;
* Science Girl, Blondie, Cueball #2, and Megan play games;
* Ponytail is fully vaccinated;
* Hairbun receives her second dose;
* Hairbun, Black Hat, and Ponytail go to the movies or make a movie (the label is just "Movie");
* Danish is fully vaccinated;
* Cueball #1 is fully vaccinated;
* Hairy is fully vaccinated;
* White Hat is fully vaccinated;
* Danish, Cueball #1, Ponytail, White Hat, and Hairy attend a birthday party;
* Hairbun is fully vaccinated;
* Hairbun and Blondie go to dinner;
* Black Hat, Science Girl, White Hat, Hairy, and Cueball #2 go to a cabin.

Caption below the panel:]

Post-Vaccine Social Scheduling

{{comic discussion}}
[[Category: COVID-19]]
[[Category: COVID-19 vaccine]]
[[Category:Timelines]]
[[Category: Comics featuring Cueball]]
[[Category: Comics featuring Megan]]
[[Category: Comics featuring Hairy]]
[[Category: Comics featuring Ponytail]]
[[Category: Comics featuring Hairbun]]
[[Category: Comics featuring Blondie]]
[[Category: Comics featuring Science Girl]]
[[Category: Comics featuring White Hat]]
[[Category: Comics featuring Danish]]
[[Category: Comics featuring Black Hat]]

Talk:2445: Checkbox

2021-04-01T23:09:17Z

Piano:

If left alone, the morse code produced spells "WHAT" (.-- .... .- -) [[User:Ezist|Ezist]] ([[User talk:Ezist|talk]]) 22:50, 1 April 2021 (UTC)

I'm early enough that there isn't a summary yet, and I'm not confident enough to start one, so I'll just drop my thoughts. If you click the checkbox repeatedly, at some point it starts playing Morse code. Presumably, there are a whole lot of different sequences. So far, I've gotten .- - .-- .... (which translates to ATWS; no idea what that means) and ..... (just 5, I think). Meanwhile, the mouseover text is ... --- ..., which is SOS. Any thoughts? What other sequences are there? Or am I totally missing something? (Edit conflict. Looks like Ezist has another one.) [[User:Aerin|Aerin]] ([[User talk:Aerin|talk]]) 22:56, 1 April 2021 (UTC)
: I got something like ATWS at first, but that's just cause I misheard one of the letters, and misinterpreted where the word started/ended. [[User:Ezist|Ezist]] ([[User talk:Ezist|talk]]) 23:03, 1 April 2021 (UTC)

Wait, sorry, I'm back. It apparently has to do with user input. No idea what I pressed to get those results lol. [[User:Aerin|Aerin]] ([[User talk:Aerin|talk]]) 22:57, 1 April 2021 (UTC)

Just a note, but a Morse code legend as well as translations of your input and the website's output are available in the console in browser DevTools. Helpful for those that don't know Morse. [[User:Toadtoad|Toadtoad]] ([[User talk:Toadtoad|talk]])

It looks like Samuel Morse died on April 2, 1872, so that might be why this comic appears today. [[Special:Contributions/162.158.212.218|162.158.212.218]] 23:07, 1 April 2021 (UTC)

"Hi" returns [.... . .-.. .-.. --- -.-.-- / .- -. -.-- -... --- -.. -.-- / --- ..- - / - .... . .-. . ..--..] "HELLO! ANYBODY OUT THERE?" [[User:Piano|Piano]] ([[User talk:Piano|talk]]) 23:09, 1 April 2021 (UTC)