explain xkcd - User contributions [en]

Talk:2680: Battery Life

2022-10-04T19:45:05Z

172.71.82.65:

I found a source saying phones need 1 kWh/year, to the closest 10 kWh. That's quite strange. Better source needed? --[[User:While False|While False]] ([[User talk:While False|speak]]|[[User:While False/explain xkcd museum|museum]]) 04:32, 4 October 2022 (UTC)

/\--- The article cited is from 2013, so quite old, and within the article it even amends the tagline value to 2kWh. iPhone 12 would last about 47 days with a 12kWh battery based on specs (2,815mAh battery, nom voltage 3.8V) and assuming that a charge lasts a full day. [[Special:Contributions/108.162.221.161|108.162.221.161]] 15:44, 4 October 2022 (UTC) JourneymanWizard

An average iPhone has somewhere around [https://www.macworld.com/article/678413/iphone-battery-capacities-compared-all-iphones-battery-life-in-mah-and-wh.html 12 Wh of capacity], which at 1 kWh/year would imply only ~23% per day. Anecdotally, that's definitely not right. An [https://spectrum.ieee.org/your-phone-costs-energyeven-before-you-turn-it-on IEEE article] claims 4 kWh/year, but I don't have access and only see this in the Google snippet. --[[Special:Contributions/172.69.134.17|172.69.134.17]] 05:37, 4 October 2022 (UTC)

* What about my S series Samsung?
It has 5000mAh battery, 3,7V voltage, ergo (5 amper * 3,7 volt) = 18,5 watts/hour. It lasts for, roughly, 1 day of heavy use at work (camera, youtube etc., its was my media device) and 2 days of weekend use.

My phone has been in use for 4 years before an upgrade, which gives 366+365+365+365=731+730=1461 day. 1467/7*6 full recharges -- ~1253 recharges. 1253*18,5Wh gives ~18,5kWh*5/4 --- 23,09 kWh; 5,6 kWh per year. [[Special:Contributions/172.70.250.223|172.70.250.223]] 07:18, 4 October 2022 (UTC)

== "Plugging my phone is a pain" as a modern problem ==

While some folks (like myself) use long (3m/10ft) cords, most people are stuck with 1m charging cables or less. That's indeed a pain if you use your phone a lot. It's also frustrating to deal with charging cables getting old while your phone's charging port is also getting old. However, Energizer's take on the problem (custom 18000mAh phone) doesn't feel good either: the resulting phone feels too heavy. A hefty brick of a ~18000mAh powerbank itself is already too heavy for many pockets, even outside of "skinny jeans" fashion. [[Special:Contributions/162.158.89.248|162.158.89.248]] 08:47, 4 October 2022 (UTC)
* Oh! By the way, last week, I almost got into a problem. I plugged my phone, went to sleep, woke up without an alarm and assumed it is too early to get out of bed. Then, the street noises made me realize it's actually 9AM already and I am late for work. "So much for XXI century smart devices", I thought. [[Special:Contributions/162.158.89.248|162.158.89.248]] 08:51, 4 October 2022 (UTC)
::In many ways, smart phones were step backward. My old Nokia phone is easier to hold in hand and can sound an alarm when TURNED OFF (obviously, there is separate circuit for counting time to alarm which remains powered). Granted, for playing games, I needed to buy a separate android game console which is sold as smartphone. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 12:13, 4 October 2022 (UTC)

Out of interest, how many people replace their phone because of the battery? There are those who would replace their xkcdPhone3000aIII for an xkcdPhone3000aIV just because you only get the blue-anodised casing with the latter and the limited-edition red-anodised case of the former is ''so'' last week (actually, probably only out six days ago). There are those who will swap when the OS gets a new version (because they might be missing out). There are those who will have to swap because NewApp doesn't support "Pancake" or "Sausagedog" or whatever version of OS it is that's now a year or three behind the curve. There are those who will swap because OldApp is no longer supporting "DoritoSandwiches" (the 5yo OS on their ''very'' well-used device) and they actually don't like giving up on it. Then there are those who will just make do with a dwindling capability (various apps going inoperable, but those that aren't are still being used whilst the rest of the device still works!). And, by the end of that list, you can be sure a charger-plug and/or powerbank is an "Everyday Carry", possibly even an always plugged in essential because even phone/tablet repair places are starting to tell you that they couldn't guarantee to get a replacement battery of the right vintage, or you find out for yourself how hard it was to effect a full repair/transplant. — For the record, I'm definitely towards this end of that list (but get a newer device to run in parallel, to probably start to consider just as unretirable as ''its'' working life starts to be compromised, at various times having perhaps three 'working' generations of device, none of them the current bleeding-edge). [[Special:Contributions/172.69.79.171|172.69.79.171]] 13:14, 4 October 2022 (UTC) — P.S.: And, so far, I have ''never'' continued the same (Android/Google) account over to a new device, or worked out how to migrate apps(+data) wholesale across devices, where not already designed with export/import facilities or just have to have the same non-device login details carried over to a sign-in/up dialogue. Must be possible/expected, but I've just never ever tried it. New device, new Gmail! [[Special:Contributions/172.69.79.201|172.69.79.201]] 13:22, 4 October 2022 (UTC)

Anyone else notice that in the third image, Cueball is supporting a 100lb+ phone with one arm, while fiddling with the screen with his other hand? Impressive balance to be able to support a 100lb object with one arm while still standing fully upright. [[Special:Contributions/172.68.174.163|172.68.174.163]] 14:58, 4 October 2022 (UTC)

It was just a few years ago that the idea of replacing a failing battery was abandoned. With batteries lasting longer and phone generations being shorter, most users would see only a small reduction in time between charges by the time they would be upgrading anyway. I interpreted the comic as the logical next step in that evolution. [[Special:Contributions/172.71.82.65|172.71.82.65]] 19:45, 4 October 2022 (UTC)

Talk:2652: Proxy Variable

2022-07-30T03:59:42Z

172.71.82.65:

Maybe Randall is commenting on this recent article [https://www.nature.com/articles/s43588-022-00281-6 Nature Computational Science: Automated discovery of fundamental variables hidden in experimental data]?
02:10, 30 July 2022 (UTC)
suggested by a proxy editor

Sorry for the mild crassness, especially as a new user, but some Nazi f*ck is vandalizing the page. May someone please ban them?

Nah, they're using multiple IPs. Someone could semi-protect it or something but there ain't any mods doing their job it seems.

Where are the mods, anyways?

2644: fMRI Billboard

2022-07-26T02:31:14Z

172.71.82.65: /* Explanation */ removed misleading statement about fMRI being a form of CT

{{comic
| number = 2644
| date = July 11, 2022
| title = fMRI Billboard
| image = fmri_billboard.png
| titletext = [other side] If the first word of an instruction you're given starts with the same letter as your crush's name, for that step imagine the experimenter is your crush.
}}

==Explanation==
{{incomplete|Created by A SOCIAL NETWORK THAT CHANGES YOUR MEDICAL RECORD. Article needs description of the common studies and brain areas referenced by the comic, and how the suggested behaviors would alter the results. - Do NOT delete this tag too soon.}}

{{w|Functional magnetic resonance imaging}}, or fMRI, is a method of imaging brain activity by detecting blood flow changes apparent from magnetic differences between oxygenated and deoxygenated {{w|hemoglobin}}. Scientists use fMRI to try to detect deception and false memories,[https://www.sciencedirect.com/science/article/pii/S0149763419301873] plan brain surgery,[https://www.sciencedirect.com/science/article/pii/S2213158217303133] and understand the relationship between brain structures and cognition,[https://www.sciencedirect.com/science/article/pii/S0149763419300879] among many other investigations. Volunteer research subjects [https://www.clinicaltrials.gov/ participate in such studies] by lying inside large toroidal scanners while conducting tasks with projected images, sounds, etc.

This comic shows a billboard erected by a neuroscience department in an attempt at sabotaging a rival department's volunteer subject compliance with their fMRI study instructions, by suggesting behaviors which would likely produce unexpected results, such as recalling a frightening memory after seeing similar stimulus slides, or imagining the lab technician is a romantic interest when reading words that begin with the same letter as their name. This is funny because academic department rivalries do not usually lead to sabotage,{{citation needed}} and in the rare cases when they do, it's usually clandestine instead of so absurdly blatant. The comic also shows neuroscience in terms of the technologies used to study it, and how experiment instructions can influence its development.

Following such suggestions or even inadvertently remembering them during an fMRI could very well interfere with its results. fMRI experiments are often criticized because they have low {{w|statistical power}} and can easily be confounded by experiment subject error in following instructions, among many other variables. In a famous 2009 study, a dead fish was shown to have apparent evidence of brain activity when scanned with ordinary fMRI techniques.[http://prefrontal.org/files/posters/Bennett-Salmon-2009.pdf] In 2015, discovery of a statistical error invalidated at least 40,000 fMRI studies.[https://www.sciencealert.com/a-bug-in-fmri-software-could-invalidate-decades-of-brain-research-scientists-discover] Subsequently in 2017, many more fMRI results were further discredited due to poor software parameter selection.[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5487467]

The title text indicates that the sabotaging instructions are printed on both sides of the billboard, suggesting that it might have been erected on the grounds of the targeted rival department. Alternately, the instructions on the other side may be intended to disrupt research at the other institution.

==Transcript==
:[A large, building-sized billboard rises over what appears to be a college campus. The sign is supported by two sturdy planks disappearing behind one of two long one story buildings lying next to each other. The board is higher than the buildings and almost as long as the one it stands behind. That building seems to have a flat roof where the other has a peaked roof. It could, though, be a matter of perspective, and that both buildings have the same kind of peaked roof. There are several windows visible in both buildings and a door in the middle of the one with the billboard. There is a forest behind the buildings. In front of the main building there is a path with a round area just outside the door. The path goes past the next building, with yet another round area between the buildings. These round areas are where two paths crosses. Megan is standing outside the door, Cueball walks towards the round area between the buildings, Ponytail sits on the grass between the two paths going away from the buildings, she sits near a tree. Closer to the tree and also closer to the buildings another Ponytail like girl is standing together with Hairbun. The sign reads:]
: ⚠ Student fMRI study volunteers ⚠
: Remember, when you're in the scanner, if you see a slide that's similar to one they already showed you, think as hard as you can about your scariest memory.

:[Caption below panel:]
:A rival neuroscience department keeps trying to sabotage our experiments.

{{comic discussion}}

[[Category:Comics featuring Megan]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Ponytail]]
[[Category:Comics featuring Hairbun]]
[[Category:Science]]
[[Category:Psychology]]
[[Category:Biology]]

1756: I'm With Her

2022-06-01T21:23:36Z

172.71.82.65: goofy ahh article

What's up guys! It's Quandale Dingle here! (RUUEHEHEHEHEHEEHE) I have been arrested for multiple crimes (AHHHHHHHHHHHHH) including: Battery on a police officer (WHAT), Grand theft, Declaring war on Italy, and public indecency (RUHEHEHEEHEHEHEHEHEHEHE X2 speed). I will be escaping prison on, MARCH 28TH! After that.... I WILL TAKE OVER THE WORLD
Greetings! Quandale Dingle here. My cousin Henry Dinglenut got arrested for putting TNT in a daycare center. (WHAT THE FUCK??) I put a camera in Joe Biden's bathroom and watched him take a poop. (WHAT????) My Asian brother, Quanliling Dingle put illegal substances in my ramen and I died.
Hey, Quandale Dingle here. I just escaped prison and staying at Juandale Pringle's house. As I was running away from cops, I fell and scraped some of my foreskin off. A guy named Garfield Jenson bit me over in the shower while I was in prison. My baby momma Shiniqua Inderson told me to pay child support so I gave my baby to a creepy old guy,
What's up guys, it's Quandele Dingle here
I have been arrested for multiple crimes
Including battery on police officer (what)
Grand theft, declaring war on Italy, and public indecency
I will be escaping prison on March 28th
After that I will take over the world
Greetings, Quandele Dingle here
My cousin Henry Bartholomew Dingle Nut
Got arrested for putting a TNT in a daycare center (what the fuck)
Put a camera on Joe Biden's bathroom and watched him take a poop (what)
My Asian brother Quan Ling Ling Dingle put illegal substances in my ramen and I died
Hey fellas it's Quandele Dingle here
I put perks on Vladimir Putin's drink
And he went to bed for a really long time
I trapped my autistic son's hand in an air fryer (herrrrr)
I dumped boiling water on a prison guard's head
My goofy ah friend, Jamarious Quandele Dingle tried to eat my but during Ramadhan