Another question reminded me of this short story, which I read in an anthology before 2000. A time machine has been constructed. It takes up a lot of space, possibly the entire ground floor of a building, and uses a lot of power to project a small payload back in time. One man had gone back, and...

I'm trying to identify a short story involving replicators/fabbers/3D-printers. The devices use a carbon fiber that can be recycled, and that fact is important. I remember the use of the Harold McMillan quote: "Tradition doesn't mean that the living are dead, but that the dead are living." I seem...

Is there a symbol or representation for tolyl groups as there is for the phenyl group? Phenyl group is often represented by "Ph" when for a matter of space you can not draw the entire benzene group. Is there any accepted or extended representation for a tolyl group?

I am beginning to write a formula in B9. This formula will be applied to all similar rows down the sheet. What I am wanting to do is for B9 to check for al instances of "In-progress" in its respective row. Then if it does find an occurence, find the column header and return that value. For exampl...

Is there a more elegant or shorter way of reconstructing a list from its PositionIndex? The following I regard quite cumbersome: list = {a, b, c, a, c, a}; pi = PositionIndex[list] Range@Max@Values@pi /. Reverse /@ Flatten[Thread /@ Normal@pi] % == list Clear[list, pi] <|a -> {1, 4, 6}, b -> ...

Working on supporting ACH payments via eCheck.net. Which "Payment method" should I use?

I read that in 1986 Voyager 2 measured the composition of Uranus' atmosphere, which turned out to be composed of $85 \%$ hydrogen and $15 \%$ helium. It's not clear to me how this relevant amount of He can be present. The force of gravity on Uranus ($8.69 \space \rm m/s^2$) is lower than that mea...

I am travelling to India next month. I am carrying 2 check-in bags coming from the USA. I wanted to know if the domestic flights like Indigo allow free bags for international travellers, or is there an alternate way to go from Bangalore to a tier-3 city?

There is a famous Midrash that Yaakov took a Vav from Eliyahu. This is why their names are spelled אליה & יעקוב They say it has to do with the announcements. What did he take? I.e. what כח was in the Vav? Reference: www.sefaria.org/Rashi_on_Leviticus.26.42.1

I know, I can reset a rotation with Alt+R. But this resets the rotation always with the pivot point of the object. But I rotated my object with pivot point cursor : R > Z > mouse movement. And no, I cannot do "undo", because I changed my mesh in the meantime, I just want to rotate it back. If th...

I am really confused. On google and other places(though very old) it is mentioned that Cynobacteria are the same as BGA(Blue-Green Algae) and are technically bacteria and are places under the kingdom monera. However, in some places is it mentioned that they are not the same and so does my teacher...

Four years ago, I thought I was cosigning on my sons car. At the time, I was in Oklahoma, and he was a New Mexico so everything was done trough FedEx. I have since moved to New Mexico and experience some financial hardships. Therefore, I’m looking at filing chapter 7 bankruptcy before the end of...

Windows 1.x, 2.x and 3.x required a DOS to be loaded before running them. Later Windows 9.x and ME had similar (?) way of working, but DOS was included with them, 32-bit multitasking and other stuff added. I would like to ask about MS-DOS window in Windows 95/98/Me. Correct me if I am wrong, but ...

Short version: Start with a closed interval of length $t>0$ and repeatedly remove a random and uniformly distributed subinterval of length $1$ so long as this is possible. For $t$ large, what is the asymptotic of the expected value $\varphi(t)$ of the number of steps that this process will run? ...

Recently I read an article (Prestigious journals make it hard for scientists who don't speak English to get published, study finds) stating that there appears to be minimal effort in a wide swath of (bioscience at least) journals to be more inclusive on the language front. Essentially, publishing...

In this tutorial page 17, it says: "Aluminum is even simpler than Silicon: one atom per unit cell in a fcc lattic". If it is FCC, then it should be the same as Silicon, two atoms per unit cell, ibrav=2.

I often run these statements: docker stop $(docker ps -aq); docker rm $(docker ps -aq) What's the shortest way to type this? I tried docker {stop, rm} $(docker ps -aq) but that doesn't expand to two separate statements.

When I type the character q on my keyboard in vim, it exits vim. Why? Today I tried it edit a file with the file extension .man. I wanted to edit the file with a macro, so I tried to type qq -- but when the first q was entered, vim closed! vim test.man This is on a fresh install on Debian 12. I ...

Assume that the time period takes place at some point before cannons and other later siege equipment (medeival, antiquity, bronze age, etc.) Stone mages can affect materials that follow the geological definition, which are "naturally occurring and coherent aggregates of one or more inorganic mine...

Ever since I got a dog who loves to sniff and chew most things that come across her path, I have been hyper-aware of plastic bottle caps thrown onto the street/sidewalks/grass/etc. Most caps are HDPE 2 and HDPE 5. I have been collecting for a year now and wonder if I could safely melt the caps an...

In the documentation for the GDAL/OGR OpenFileGDB driver, there is a Dataset open option called LIST_ALL_TABLES. Using python, how exactly do I set that?

So I'm trying to work my way through Ernst Kummer's De Numeris Complexis, and I've reached a point where I keep stumbling over something that should be very, very simple. After almost an hour of playing around with this, I have been unable to solve it, and so appeal to the community for help. The...

I dropped out of a physics degree and do not have a degree. After this, I somehow found myself going from writing marketing software related code to writing quantitative trading code and doing quantitative analysis of the economy in order to facilitate trading decisions. Years later I have dozens...

Hi there I'm working on my thesis and looking for the best way possible to present tabular data. I don't have much experience with LaTex, hence, I though to seek for some ideas and hits on how to do it. To be fair, neither I'm dealing with very complex tables nor there are many of them in my work...

Here is a diagram created by overlapping four circles. The overlapping circles create eight regions. Put a number in each of the eight regions, using each of the numbers 1 to 8 exactly once, so that the sum of the numbers in each circle is the same. This puzzle is from http://www.earlyfamilymat...

The Chinese Online Visa Application asks if I have visited any other countries or regions in the last 12 months. I have visited Japan, Korea, Taiwan, and Hong Kong SAR. Unfortunately, I do not see an input option for the latter two. How best should these "regions" be addressed in my application?

Full disclosure (in order to forestall indignation): I'm going to be using this result in my upcoming paper (I have a statement which I show to be equivalent to $\neg CC(\mathbb R)$ and which I want to prove to be consistent). So if you really don't want me to finish my paper, don't answer this q...

I need to perform a deep copy of a binary tree using the Morris traversal. I think I managed to do it, that is the code below returns what I expect; however, I am not 100% sure I have covered every corner case. I would appreciate it if someone could confirm my implementation: Doesn't create new ...

AJAX Security Cheat Sheet § Always return JSON with an Object on the outside says: Always have the outside primitive be an object for JSON strings: Exploitable: [{"object": "inside an array"}] Not exploitable: {"object": "not inside an array"} Also not exploitable: {"result": [{"object": "inside...

I've found this article and this what I used to generate CA cert: openssl genrsa -des3 -out myCA.key 2048 openssl req -x509 -new -nodes -key myCA.key -sha256 -days 1825 -out myCA.pem I name it "MyCert" And I used it to sign the cert I generated for localhost (it was the output of ChatGPT) $ open...

I am currently going over a translated children's picture book, お掃除を覚えたがらないリスのゲルランゲ; it seemed to have gotten popular in Japanese children's literature, but not anywhere else; I can not find the original French title or even if it was translated into English. Regardless, I am focusing on a partic...

Four years ago, I withdrew from my Ph.D. program for several reasons. I was ABD, 4.0 GPA, had several publications under my belt and plenty of conference presentations. I did not pass two dissertation proposals. I was feeling burnt out and a lack of support from my advisor. After withdrawing, my ...

In an infinite square well, potential energy is given below, why is the probability of finding a particle in the position of infinite potential energy zero? $$V(x)=\begin{cases} 0,& \text{if } x \ \text{in}\ (-a,a) \\ \infty, & \text{otherwise} \end{cases}$$ The usual explanat...

Player knew that a illusionary wall (Major Image) was fake. They wanted to centre the Fireball past the illusionary wall to catch a target that had just run thought it. I said, they couldn't as they didn't have line of sight, although they did have line of effect. Was my ruling correct?

I would like to use the MIC5014 to drive an N-Channel MOSFET as a high-side switch. My supply voltage in this system is 24V. I understand that the MIC5014/MIC5015 uses an internal charge-pump to bring the gate of the power FET above the supply voltage, and that it uses a Zener diode to prevent ...

GPLv2 terms state the following (see below). But does this means to be able to charge an unlimited amount for copy transfer (it may be object code) and the limitation not to exceed distribution fees is applied only to source code (especially when asked by a user who recieved the object code)? 3. ...

What are the actual definitions of \newline, \linebreak and \break (and also \par)? Is the latter a TeX primitive? I can't find the relevant documentation anywhere regarding their precise function, other than general discussions, so perhaps someone can point me in that direction too. This questio...

The Talmud in Masechet Avodah Zarah 43a states Jews are forbidden from making replicas of items of the temple. My question is, are they issur hanaah?

According to Halacha are Jews obligated to do bedikat chametz before Passover in cars? Or no, is there not an active obligation to search for chametz before Pesach in cars?

These words can be grouped into four groups of four words, with a connection between all of the four groups. What is the connection? MARK BAR ANGLE MAMMAL SAUCE NATURE CENT CHANCE MURDER PENT EDUCATION SPY PLACE SPEED BURN THOUGHT

I've recently come upon the word 鱷梨 (simplified: 鳄梨, pīnyīn: [è lí]), meaning¹ avocado, and am currently looking for its etymology. Wikitionary mentions it being a calque of alligator pear, which makes sense looking at each 漢字 separately. Then, looking at the entry for "alligator pear", one finds...

As I understand it if a police officer doesn't read the miranda warning any answers you give to their questions can be dismissed in court. (I'm sure there are exceptions to this). If they read the miranda warning you have the option to plead the 5th but that wont necessarily prevent them from as...

I am really sorry to bother you for the same problems, but I cannot get in the view about this command, the filling option. What I want: to fill the semicircle part, under the $y = x$ curve. Here is what I did so far, but there is a slight piece filled in excess. Can you please tell me how I woul...

I booked an Alaska ticket using BA Avios. BA gives their own booking reference which Alaska doesn't recognize. How to find the Alaska booking reference for this reservation? It doesn't seem to be immediately available on ba.com.

This meme is on many places on X. (I found it RTed on Ben Shapiro's X timeline). Are the numbers accurate?

The game is played on a 1x8 board with the following setup: KNR..rnk White's pieces are on the left, while black's pieces are on the right. The king (K) can move 1 space in any direction. The knight (N) can jump 2 spaces in any direction, regardless of bordering pieces. The rook (R) can move any...

I know I read this when it was already a classic, as a teenager in the 1990s. The author I think was well-known and male and American, but that doesn't narrow it down once. It was unusually short. It might have been in Asimov's Science Fiction or an anthology? It addresses the reader and explains...

I've found that my most recent project has been taking a significant portion code from a GNU GPL code base. While i’m aware that the nature of copyright law allows for such usage, I’m unclear about the concept of ‘fair use’ as it pertains to code. Specifically, I’m wondering how much of a given w...

A sequence of reals $x_1,...,x_n$ is said to have a turning point at index-value $i$ ($1\lt i\lt n$) iff $x_{i-1}\lt x_{i}\gt x_{i+1}$ or $x_{i-1}\gt x_{i}\lt x_{i+1}$. The number of turning points in the sequence is denoted $T(x_1,...,x_n)$, and we define the turning-point fraction as $$R(x_1,....

I am designing an outdoor shower, and now I'm thinking about how to winterize the plumbing system. The current design has the system exiting the house, going underground, crossing the back yard, and then going up again to the shower head. How do I choose an appropriate air compressor for blowing ...

Does physicalism enjoy the simplest ontology among all worldviews? Are there alternative conceivable views of reality with a simpler ontology than physicalism that can explain the same data? For example, what about idealistic worldviews, metaphysical solipsism, or some creative versions of brain ...

I have a very large .bib file, which I use in my latex project (a research paper). How can I remove all unused entries in a .bib file? I don't want to only list them (as checkcites does), but instead I want to remove them. I found https://github.com/jamestrimble/remove-unused-citations but its r...

For an algebraic number $\alpha$, let $f_\alpha$ denote its minimal polynomial. We can symbolically represent an algebraic number $\alpha$ by the tuple $$ (f_\alpha, x, y, r) \in \mathbb{Q}[x] \times \mathbb{Q}^3 $$ so that $\alpha$ is the unique root of $f_\alpha$ inside the circle centered at ...

Usually I would like to enclose the word under cursor with [, ], (, ), {, } by simply selecting the word (select mode or visual mode) and typing [, for example resulting to: hello to [hello]. To do this I quickly wrote this function: function! EncloseSBraces() let l:sword = @* let l:cLine =...

I find the language in Luke 1:77 confusing. Does the original text offer anymore clarity? I have looked at other translations and still do not fully grasp the meaning of the verse: to give knowledge of salvation to his people in the forgiveness of their sins, Similar language in Mark 1:4 John ...

I'm wondering whether or not standalone accidentals always imply 3rds in figured bass notation. Is (5)(♭)(8) the same as (5)(3♭)(8)? Is (9)(♮) the same as (9)(3)? Can a figure 3 always be inserted beside a standalone accidental within a stack without changing its realization? I may as well also a...

In the Genki II 3rd-edition textbook, pg. 192, there are drills to practice both respect and humble keigo. In problem #9, a speaker asks: 日本文学に興味がありますか。 Are you interested in Japanese literature? According to the answers, the correct respect-keigo conversion of ありますか is おありになりますか, but this sounds...

In this world there is a species of Apex predators that roams every corner of the planet, creatures basically unkillable... Oh, and it flies, very fast. But they have only one weakness, they are blind and almost completely deaf. Instead they rely on a very powerful sense of smell that is extremel...

Greetings I've been recently working on a small piece of documentation file using beginner-level LaTeX. The acknowledgement and the purity of the documentation was satisfactory by now. Unfortunately, since the documentation file is not going to be conducted as physical-form composition, I have de...

Kind regards. I am using blender 3.5. To model the bifurcation of a blood vessel, I started with a cube and applied the subdivision surface modifier to it. Then I applied successive extrusions and eliminated some faces to try to obtain the Cross Sections look (Figure A). However, I am not able to...

In the ASCII table, … ! (exclamation mark) is also a printable character and its decimal representation is 33 a (latin small letter a) is a printable character and its decimal representation is 97 } (right curly bracket) is also a printable cahracter and its decimal representation is 125 I want...

So, once I created a package and download to my system from Sitecore, is there any way to know what is the contents of package or may be just path of those item. I want to achieve this with out downloading the package into other environment.

So here I have a standard 19V noname laptop power brick rated at say 4A output. Inside is a typical SMPS regulated by a TL431 and an optocoupler. I added in a potentiometer to the reference resistors on the TL431 so am able to vary the output voltage (say 10-19V now). I am curious what the limiti...

When I was growing up, my generation (gen X) was rather apathetic in our youth. Politics was the boring stuff done up there with little bearing on what's happening down here. It was the realm of adults whose job it was to run society. We had better things to do like rock out to the latest music, ...

In R, I am trying to calculate Matérn covariance matrices whose inputs are randomly created distance matrices. However, I often end up getting covariance matrices that are not positive definite, which makes little sense. At first, I had asked a version of this questions at StackOverflow, but a f...

I'm writing a document in two languages using the macro \enzh defined as below: \documentclass{article} \newif\ifen \entrue % comment out to switch to Chinese \newcommand{\enzh}[2]{\ifen#1\else#2\fi} \begin{document} \enzh{English text}{Chinese text} \end{document} It currently shows "Englis...

I am an undergraduate (grade three). I am confused about the cryptanalysis. Because a lot people say that the modern ciphers are complete and they can't be cracked. Maybe the prospects for cryptanalysis are bleak?

Recently found an exercise for high school students as follows: Let $A,B$ be $2\times 2$ matrices with real entries and suppose $A^2=B^2$, $\operatorname{tr}(A)\neq0\neq\operatorname{tr}(B)$. Show that $AB=BA$. Since it only ask the case for $2\times 2$ matrix and hence we can simply bash out all...

Questions: In figure (1) I want to give blue color to 0 (Zero) In figure (2) I want to shade the numbers (figure is attached) MWE: \documentclass[12pt]{article} \usepackage[bindingoffset=0.2in,left=0.5in,right=0.5in,top=0.5in,bottom=0.5in,footskip=.25in]{geometry} \usepackage[centertags]{amsm...

I'm trying to add an equipment ground to an old branch circuit, and I had an idea about how to do it in a slightly non-standard way, but I'm not sure if it's safe. I drew a diagram to explain my situation: The ungrounded circuit originates from my main panel, and it's going to be quite difficult...

Some time ago I heard a radio drama on one of the Old Time Radio internet streams and I am trying to find the name of the show. The story is set in a future society which is overseen by a government providing universal social security to all. When a person becomes unemployed they continue to rec...

The German translation for the phrase “priesthood of all believers” is “Priestertum aller Gläubigen”. According to everything I have read, Martin Luther popularized the doctrine but did not use this exact German phrase anywhere in his writing. What is the earliest known time this phrase appeared ...

I have been trying to find the max and minimum values and make it to a list. I have been using some of the previous forms and it doesn´t work.This is my function: Apa[x_] := x Cos[ \[Pi]/6 ] (x^5 - 2 x^3 + x) - 0.08 Solve[Apa[x] == 0, x] And these are my x-values. {{x -> -1.12682}, {x -> -0.7818...

For context, I am an undergraduate at a T20 school. My summer plans fell through and I am currently in the process of figuring out what to do. For personal reasons, I would like to spend the summer at home, and I noticed a professor is researching a topic I am interested in at a university in my ...

In a short story I am writing I have a magic system that involves nanotech left behind from an ancient advanced civilisation that can allow for magic like effects. In this story the characters primarily use this nanotechnology to control the weather by creating several weather phenomena like torn...

I see that one similar question has already been asked, but it was rather vague on specifics. Essentially, I wish to place a fine mesh strainer over a cup, pour around 1 tbsp of cacao powder (Navitas Organics brand) into the strainer and pour 8 oz of freshly boiled water over the powder, then all...

Sort of a follow up question to this question. In that question, the auction goes 1NT - pass - 3NT - all pass. The answers to the question point out that, by opening 1NT, declarer is saying they have ~16 HCP. Their partner, bidding 3NT in response to 1NT, indicates they have ~12 HCP. Since there ...

I have a very small part of a protein that is supposed to be helical. However, in molecular dynamics simulation, it unfolds and gets into extended conformation. Is there any way I can force it to stay helical by applying any restraints, or any other biases? Thanks.

I worked for 4 months at my previous job, which I loved. It required a high security clearance that came in stages. I passed the first two and on the third check, concerns came to light and I was last minute asked to join a Zoom meeting on my day off. When I joined, I saw my boss and a lady who w...

I am a bit confused. Here are my examples: I get my home cleaned every other week. I'm having my office painted. They had their toilet fixed. Am I correct to think that my past participle verbs are adjectives in the past participle form? Or is this an example of the passive voice?

I think I read this in the 80s. In the future overpopulation is a problem and all families are limited to two children. (It is not the Ender's game series which has a similar restriction on family size.) A husband and wife believe this law is wrong and their third child is born. An announcement i...

I have a very naive question, actually someone asked it and I can't answer. It simply asks that if gravitational energy cannot be localised (we cannot write a pure gravitational energy momentum tensor) then how do gravitational waves carry energy? I realised I do not understand gravitational wave...

I am trying to display a map of European river network on a Leaflet map, using as data source the EUHydro layer published by CLMS (here is the webpage, and the WMS GetCapabilities document). Here is the code I wrote for now: const mapOptions = {}; const map = L.map('map', mapOptions).setView([44...

We are using SQL Server 2019 with a third party application that makes heavy use of the tempdb database. And we have lot of PAGELATCH_xx waits on tempdb. Memory-Optimized Tempdb Metadata is enabled. Just checked that this query returns 1: SELECT SERVERPROPERTY('IsTempdbMetadataMemoryOptimized'); ...

I'm new to PostgreSQL and SQL in general and I've got a bit of an issue understanding PKs, FKs an serial id and when to use them. I'll try to add info on what I have already tried so far, but I can't recall all of it as I've done a lot of trial and error. https://dbdiagram.io/d/biodeg-65f43429ae0...

We had a discussion at our table regarding the Bestial Soul feature of the Path of the Beast barbarian. The feature says When you jump, you can make a Strength (Athletics) check and extend your jump by a number of feet equal to the check’s total. You can make this special check only once per tur...

In the past, I had a problem with the diagnostics virtual text not coming back after exiting insert mode. After a few hours of searching I just gave up. Today I have spend 2 hours trying to get my autocmd to dismiss copilot ghost text when exiting insert mode. (Very annoying to have this text sti...

This is one line of the song lyrics: 這個起風的季節說了再見。 When I look up the Chinese dictionary it say the meaning is 颳風 guāfēng means to be windy. So the phrase 這個起風的季節說了再見。 means "This windy season say goodbye." Or is there another meaning?

My Drupal 10 website hosted on OVH was working fine, but now, whenever I try to access a page with a form, I get an error on that page The website encountered an unexpected error. Try again later. Drupal\Core\Database\DatabaseExceptionWrapper: SQLSTATE[42000]: Syntax error or access violation: 11...

I read this about ten years ago but it seemed much older. The Martian seems like an innocent sweet old lady. A human girl visits her house and watches her baking something like apple pie. The girl says she heard that in the olden days before humans came to Mars, Martians used to kill babies. The ...

So say many light years away there are many black holes colliding and so there are many 9 solar mass gravitational waves floating around and some of them concentrate around a 10 earth mass planet. So what would happen if some of that concetrated near the planet, would the planet be pulled towards...

I am not a musician, just a dilettante. I am interested in the traditional Chinese music system, which is supposed to be a pentatonic scale. According to Wiki, one way to get a pentatonic scale is to take five consecutive pitches from the circle of fifths and put them into one octave. For example...

It is to say a dominant seventh without the degree II of root tonality. For example, in Clara Schumann's lied Was weinst du, Blümlein, we have B-A-B-D#. In this bar we are in E major ; this chord seems like a dominant seventh without F#. How can I make its chord notation (with roman numerals) ? F...

For matrix A = {{x*Exp[I*y], z}, {z, x*Exp[(-I)*y]}}; , Mathematica yields the following eigenvalues: e1 = ((1/2)*(x + Exp^(2*I*y)*x - Sqrt[x^2 - 2*Exp^(2*I*y)*x^2 + Exp^(4*I*y)*x^2 + 4*Exp^(2*I*y)*z^2]))/Exp^(I*y) e2 = ((1/2)*(x + Exp^(2*I*y)*x + Sqrt[x^2 - 2*Exp^(2*I*y)*x^2 + Exp^(4*...

I want to draw the following projection picture for the cuspidal cubic curve in Mathematica. Does anybody know how to do this?

If we restrict all parameters in the set building axioms of $\sf ZFC$ to definable sets, would the celebrated Cantor's theorem still apply? Can existence of uncountable sets be proven at all? The set building axioms of $\sf ZFC$ are the axioms of: pairing, union, powerset, Separation and Replacem...

Bespell Strikes adds 1d6 damage to a Strike after casting a Spell: Requirements Your last action or spell this turn had the acid, cold, electricity, fire, or sonic trait. Conduct Energy adds 1 damage per weapon die after any activity or Spell: Requirements Your most recent action was to cast a...

I try to create a non-copyable and non-movable class, whose object construction should only be done via a create function instead of public constructors. The create function will return a std::expected object either holding the created object or an error object. In order to enforce construction v...

I tried searching on Archives of Nethys to find the answer for this question, but I just do not know how. In Complex Search, I should be able to filter for actions, in the help it says: actions Actions or time required to use an action or activity I tried "actions:1", "actions:one-action" and "...

A very silly question perhaps but why does Stim skip certain numbers when it initializes the surface code? For example, a distance 2 surface code has 4 data qubits and 3 ancilla qubits. The Stim rotated surface code indexes these 7 qubits with 1, 2, 3, 6, 7, 8, 12. QUBIT_COORDS(1, 1) 1 QUBIT_COOR...

So, I have Schengen visa with the following dates: FROM: 09-12-23 UNTIL: 07-12-24 NUMBER OF ENTRIES: MULT DURATION OF STAY: 90 I have already travelled to Spain and came back to my country on following dates: 9th December 2023 to 21st December 2023. Now my question is, can I enter Schengen countr...

Why does the following not work in bash? # ensure TEST is unset export TEST='' echo "Hello world!" > test.txt && TEST="$(cat test.txt)" echo "$TEST" It always returns a blank line for some reason. doing it on seperate lines gives the expected result: # ensure TEST is unset export TEST='' echo "...

I'm trying to look up some of the data in a genealogy tree in an l3prop property list and do special stuff depending on what's in it. In this MWE it is pared down to something not really useful, but hopefully it's clear what I'm trying to achieve. The "uuid" values of people are used to put somet...

For the purpose of this challenge, arguments are things you pass to a function at the call site, while parameters are what the function uses in its implementation. Or, more succinctly: arguments = external, parameters = internal. While there are several modern languages that have support for a...

Given a non-empty string containing only printable ASCII (codepoints 0x20 to 0x7E), write the shortest program or function that map the key to its value. Inside the string the key will always have a value and vice-versa. How the key is made: Start with an opening parenthesis ( Contains letters a...

I was trying to tell a Japanese friend that I am studying particle physics, but I didn't know the word for this branch of physics, so I looked it up online. From what I could find, it should be 粒子物理学, but then he told me that he believes it should be 素粒子物理学 instead. Why, and what is the differenc...

My question is prompted by the recent question Why is it "is there free will?" and not "what is free will?". Can a person know that something like "free will" must exist even though an exact definition in words, using language, cannot be provided, and in the absence of a complete theory that expl...

I am rewinding a transformer that got fried. It is a single phase, reducing transformer. On the primary we have mains, and the secondary is tapped at different points. See figure for details. Unfortunately the windings had been destroyed at several points, and I could not figure out what the GND ...

I've been studying the interference phenomena observed in the double-slit experiment and came across a concept that piqued my interest. It is well understood that for interference patterns to form, the overlapping waves (or photons) must exhibit a degree of coherence. However, the underlying quan...

I use this syntax to delete lines from 2.txt to 1.txt: awk 'NR==FNR{a[$0]=1;next}!a[$0]' 2.txt 1.txt > lines.txt My lines are in this format: email@email.com:something If this line is identical in the two files, I get lines.txt without this, so it's good, BUT I want to delete lines if the emai...

In vitalik's post the below is mentioned, This is the pairing. Mathematicians also sometimes call it a bilinear map; the word “bilinear” here basically means that it satisfies the constraints: $e(P, Q + R) = e(P, Q) * e(P, R)$ $e(P + S, Q) = e(P, Q) * e(S, Q)$ Whereas the textbook definition ...

If I run 12-3 NM cable from the circuit panel to a room can I use that cable to power both the lights and outlets? Black and white to the light switches and outlets. Red from light switches to the lights, terminated at the panel and outlets where not needed. Is this a problem? I'm not in the US,...

Two prisoners are planning their escape. Their cells are locked with a padlock that must be opened with a 5-digit code (numbers 00000 to 99999). Each prisoner knows the code of the other prisoner's lock. One prisoner starts with a small bag with 20 identical marbles, while the other prisoner star...

What kind of symmetry I can use to get the result? I think I have to redraw a circuit, but how?

The question says it all. It's a commonplace that "airliner travel" for passengers is far and away the safest travel, on almost any metric (per mile, hour, per human-year, etc). However, I've seen it said that for airline crew (who obviously fly ~once or even many times per day) the danger become...

Atmospheric pressure is stated as 14.7 pounds per square inch (square inch is the area unit). When mmHg is utilized, what is the area unit? For example, if blood pressure is "120", does that mean 120 mmHg per square millimeter?

I'm attempting to create a matrix where the basis I'm using appears to the top and left of the matrix, and based on online suggestions, I landed on using either the built-in \bordermatrix or the blockarray or pNiceMatrix environments from the blkarray and nicematrix packages respectively. I'm lik...

A friend of mine teaches German at a university outside the EU and has observed a rise of the quality of essays written by students, comparing the same years of study: first-year students now compared to first-year students a year ago, second-year students now compared to second-year students a y...

In tons of videos, (just one example) the wood transforms into something totally different with a finish. I can't for the life of me get anything even remotely as nice as those things. At best I get a small change in colour, but never have I been able to "buff out" the wood grain so much. What ar...

At the end of my novel, the surviving crew of a spaceship is hurtling past a Dyson swarm that encloses the sun where the asteroid belt used to be. They are traveling too fast for orbital insertion and have lost most of the water they use for reaction mass. They are using a less powerful backup pr...

Let $(X,D_X)$ and $(S, D_S)$ be smooth normal crossings pairs over $\mathbb C$; i.e. smooth schemes of finite type over $\mathbb C$ with a normal crossings divisor. If $f:X \to S$ is a proper, flat and log-smooth (with respect to the log structures given by the divisors) such that $f^{-1}(D_S)=D_...

I have a Geometry Generator symbol for layer, created by a script (QGIS plugin). This is line symbol (make_line(), inside some translate/offset_curve transformations), but when added it is displayed as polygon. Because this layer's main purpose is to display/visualize (between-point) data I would...

With only them vulnerable, partner open 1 club (possibly a "convenient" minor) in second seat. My right hand opponent overcalled four hearts (showing eight). I passed with the following. ♠ AT8652 ♡2 ♢93 ♣ AQJ7. They made it, giving us an average minus score. Others did better to bid four spades, ...