My context is that I have a cargo trike (Babboe Curve). Especially in the winter dark, some car drivers mis-identify it as a bicycle and pass it too close. My solution to this was to fit a string of LEDs and a combined solar panel/battery pack, which worked for a while. Over time the string of LE...

I am looking to obtain a representation for the vector in this way I have only managed to get these two ways. Another option would be to use \varoverrightarrow{A}, but the arrow gets longer and I can't make the letter bold. \usepackage[utf8]{inputenc} \usepackage[spanish]{babel} \usepackage{ams...

You are given an array A of non-negative integers. You can pick any non-empty subset, S from the array A. The score of a subset S is the sum of the elements in S raised to the power of K, i.e. for a subset S={s1,s2,…,sm}, the score of S is (s1+s2+…,sm)K. Output the sum of scores over all possible...

Am I right that a string of beads and a strand of beads are synonyms? If not, then what is the difference between them?

In Possible number of open sets in a topology Shreya Jaganathan asked if there exists a finite topological space with exactly 100 open sets. It was quickly pointed out that for each positive integer $N$, $\{0,1,\dots,N-2\}$ is a set of size $N-1$ with the topology $\{\{0,1,\dots,n-1\}:0\leq n\leq...

I have a nested itemize environment, which should only be shown on the first slide: \begin{frame} \begin{itemize} \item<1-> A \begin{itemize}[<1>] \item A1 \item A2 \item A3 \end{itemize} \item<2-> B \begin{itemize}[<2>...

I have chosen this kind of Tunnel Boring Machine to make the tunnels (4.6m diameter). The curvature of the tunnels depends on the radius of turn the machine has. The idea is to build underground tunnels which contain botanical labs inside them. Since it is an architecture project, the labs are c...

Avis and Budget are both subsidiaries of Avis Budget Group. When I travel they often share one rental desk at the airport. Running quotes through their respective websites they typically offer the same class of (very dull) car. The only obvious difference is that Budget are usually less expensive...

Suppose so, then: What exactly can distinguish it from not existing, if the object itself is all there is? Any object trivially maps to itself via identity, so in order to deviate from the trivial case, the object would need to map to another object, which can not be the case if there is only tha...

I know there are dynamos with 3 W as the highest output, but are there commercial dynamos available with even better effect? See, I don't mind pedaling with a bit more drag if I can get better lighting on my bike.

Our current understanding of prime factorization states that it is hard to solve. The problem asks us to find the list of prime factors for an integer. For example, 18's prime factors are 3, 3, and 2. But since 3 is repeated, we only count it once. But what about a slightly easier problem---findi...

I'm currently reading "Im Westen nichts Neues" and came across the word "säßen." I found out this is the Imperfect Subjunctive of "sitzen." Here is the direct quote from the novel: Leicht hätte es sein können, daß wir heute nicht auf unsern Kästen säßen, es war verdammt nahe daran. Und darum ist...

Can an adverb as an attribute be positioned in front of the noun it modifies? Duden Nr. 1224 gives a table of orderings and so on but does not note the adverb - or any - being able to switch from front to back of the noun depending on stylistic choice or emphasis (at least I have not found where ...

How to achieve that all three axes are depicted with the same scale in Plot3D? No matter what value I set for AspectRatio (1, Automatic...) - the sphere always look as ellipsoid and the look of it even changes with every manual rotation by mouse. Plot3D[{Sqrt[1 - x^2 - y^2], -Sqrt[1 - x^2 - y^2]}...

In PostGIS, how to set default value with st_x or st_y ? I want to populate automatically two fields with lon and lat when I create a point.

In the official translation of Friedrich Engels's 论封建制度的瓦解和民族国家的产生, there is a sentence 罗马法是纯粹私有制占统治的社会的生活条件和冲突的十分经典性的法律表现. With so many 的 crowded in a short sentence, the reading is placed under high pressure, with no real and final understanding achieved without tracing each and every word with...

I am currently still learning to use TikZ to add diagrams to my paper about field theory, but it seems that I currently lack the ability to use this tool flexibly. The diagram I want to create is as follows: However, based on my understanding of TikZ syntax, I've only managed to create this: \do...

I'm reading about papers about atom-ion interaction. There are some states as showned above. The notations of the states look like molecular orbital since $\Sigma$ and $\Pi$ is usually used in orbital hybridization to denote the different alignments of wavefunctions. But the letters before $\Sig...

I'm trying to find a book series I remember reading as a kid (9-12 years old, around 2000). There are several distinct memories of the book, but I have no clue about the plot. The Aztec god, Huītzilōpōchtli, was one of the antagonists. Sir Galahad (I think it was Galahad, but it totally could've...

I'm writing a scene for a short story and wanted to describe a sunrise scene acurately. If someone was in some sort of craft in the asteroid belt and their craft was coming out from behind an asteroid, could a passenger experience a visual like the Milky Way fading into nothing? I've seen photos ...

I would like to simplify (a == c && c != 0) || (a == 0 && c == 0) to a == c How can I do that?

I wanted to install a newer version of clone on my Debian 10 stable server, so I started with following the tutorial in the first comment on this post. Then, (from memory), I ran on my server something like: sudo apt-get install libaspell15/testing libgstreamer-plugins-base1.0-0/testing... ...an...

Does there exists a constant $C>0$ such that $$ \int_{-1}^1 |x| |\partial_x u|^2 \,dx \geq C\, \| u\|^2_{H^{\frac{1}{2}}((-1,1))},$$ for all $u\in C^{\infty}_0((-1,1))$?

Using QGIS, I'm trying to make a map with Label Callouts that show both the name of the feature, as well as display an image of the feature. I'd like the position of the image to be based on the position of the Label but it seems like auxiliary_storage_labeling_positionx and auxiliary_storage_lab...

Say I'm working on a library^1 to which I want to add support for SD.h^2 but knowing for a fact that many microcotrollers don't support SD.h (therefore they result in compilation errors [eg. Attiny85]) I don't want to just #include <SD.h> (or even #ifndef __SD_H__ then #include <SD.h>) in Mylibra...

I'm importing hundreds of different textures into Blender and I want to change the blend mode on all of them from Alpha Blend to Opaque. I understand I will need to run a python command, however the ones I have tried do not work. Help would be appreciated Edit: here are 2 of the scripts I have tr...

Normally in combat, you can neither move through a hostile creature's space (unless there is a big size difference or you use special optional actions like Overrun), nor can you end your movement in the space of another creature, whether friend or foe. The way we always have played combat, when a...

Can you find two numbers composed only of ones which give the same result by addition and multiplication? Of course 1 and 11 are very near, but they will not quite do, because added they make 12, and multiplied they make only 11. To allow new users to solve this puzzle and earn reputation points...

GX connectors (unofficially called "aviation") are used for a wide variety electrical applications, including supplying power to soldering irons and motors. Usually, the voltages are low, around 5V to 24V, but they are also used to supply much higher voltages, such as 90VDC. The design of the con...

Let $X$ be a smooth manifold and $E \to X$ a complex vector bundle. A connection on $E$ is a $\mathbb{C}$-linear map $\nabla \colon \Gamma(X,E) \to \Omega^1(X,E)$ where $\Gamma(X,E)$ denotes the space of sections of $E$ and $\Omega^1(X,E)$ is the space of the space of sections of $T^{\vee} X \ot...

See picture of my watch face. I’m focusing on the outer rim of the face with the numbers on it. I’m pretty sure it’s also a 24-hour clock of some sort. I’m guessing it has to do with a sidereal or solar clock. As you can see, the time shows 11:39 am, but the sun is just past the 12. I think it me...

I have a problem with the presence of an unwanted space when I use amsthm and cleveref. The following is a MWE that highlights the issue. \documentclass{article} \usepackage[english]{babel} \usepackage{amsthm} \usepackage[hypertexnames=false]{hyperref} \usepackage[noabbrev,nameinlink]{cleveref}...

I'm trying to get the following intensity map with the same style and colors But the closest I got was using SolarColors in Mathematica DensityPlot[combinedFunction[x, y], {x, -10, 10}, {y, -10, 10}, PlotRange -> {0, 10}, ColorFunction -> "SolarColors", Exclusions -> All, PlotPoints -> 100, ...

In every of my ten years as course instructor introducing first year undergraduates to proofs, I always project this quotation on the lecture screen, then dictate the whole caboodle word for word! But for the tenth straight year, this quotation failed to teach intuition why $\color{mediumseagreen...

When FD switch is on, FD is on. When FD switch is off, FD is off. But when FD switches are recycled, FD switch on, but FD bars are not shown during approach. Is this due to approach FD logic? If so, what is the approach logic and when does it arm? I understand everything about availability of FD ...

It seems to me that "e.g." is rarely needed in parenthetical citations because readers assume that the works listed are examples taken from all works on the topic. For example: "This theory has been disproved by numerous researchers (e.g., Jones, 2012; Kelvin, 2022; Stone et al., 2019)." Why would "

I am trying to learn Qiskit on my own. I am struggling with unitary matrices. I understand what a unitary matrix is, and why a matrix is unitary. But, I don't understand what the values inside of the matrix actually represent. For example, for the Hadamard gate, I saw that the matrix representati...

In Chapter 2, page 11 of Preskill's quantum computing notes, he mentions without explaining that a counterclockwise inifinitesimal rotation by $d\theta$ about the axis $\hat{n}$ is given by $$R(d\theta, \hat n) = I - id\theta \hat n \cdot \hat J$$ Where does $\hat J$ come from and how do we pick ...

I have some schedule 40 conduit on the side of my house that was never really installed properly. The 2 inch conduit at least has an expansion joint in place, but does not have any strapping. The 3/4 inch conduit obviously needs expansion joints installed as well as strapping. The part I'm strugg...

I'm in need of some guidance regarding the two columns in the photos below. I'm trying to determine if they're load bearing. The home is an ICF build. I'm planning to remove those doors to the sunroom and potentially remove the columns to open up the space, if they're not load bearing. Any guidan...

Note: Here we use $|A|$ to denote the Lebesgue measure of a measurable subset $A$ of $\mathbb R^2$. Your party is running for election! In your country, voters are approximately uniformly distributed. Given at least half of the voters voted for you, can you divide the country into $N$ equally siz...

The following sentence belongs to a multiple-choice exercise about the grammar point うちに in the book 新完全マスターN2文法: （　　）うちに欲しい物を買っておこう。 a)　お金がある　　b)　給料をもらう　　c)　お金が残る I chose c) お金が残る, but according to the answer key, the correct choice is a) お金がある. I understand how お金がある fits fine with うちに ("let'...

This is a contemporary Xeon motherboard:- When I was growing up, the wisdom was that you placed a 47uF capacitor where the power leads attached to a digital PCB. Now, this seems to have been updated to just a 10uF as circuitry has become more efficient. So why is this motherboard covered in bul...

Recent discovery of a satellite orbiting Dinkinesh made me wonder how fragile that system must be. Based on the numbers and photos given by NASA, I estimate that binding energy of the two bodies is of order of 100 GJ, which seems like almost nothing. Do we know even smaller, gravitationally bound...

I am running a current and fully updated version of TexLive 2023. All of a sudden, none of my files would compile. I have tracked this down to an issue with fontspec. A minimal working (well: failing, really) example would be: \documentclass{article} \usepackage{fontspec} \begin{document} Lorem ...

Recently I asked a question to identify a novel which turned out to be Solaris, by Stanislaw Lem. That reminded me of another novel, clearly different, but with some analogies. I also read it long ago, but not as far back as Solaris, only about 30 years ago. And I believe that, at that time, it w...

When I was learning a bit of Italian before my first trip there, I learned that "grazie" was pronounced with three syllables, the final syllable like a quick long a sound (in English). However, when there, I never heard that, but heard "grazi" (two syllables) or some other word replacing "thank you"

So I am renting a stay through AirBnB in a room (everything else shared with the host) and I have been told shortly before check-in that I am only allowed to use the kitchen for certain breakfast meals and in a particular time frame. Thank goodness I got over my jetlag already but I am still not ...

In statistics, it's pretty straightforward to write a formula for the joint probability distribution of two random Normal Variables: \begin{align*} x_1 &\sim \mathcal{N}(\mu_1, \sigma_1^2) \\ x_2 &\sim \mathcal{N}(\mu_2, \sigma_2^2) \\ \begin{bmatrix} x_1 \\ x_2 \end{bmatrix} &\sim \mathcal{N}\le...

I am considering two different options for a roth IRA. A managed fund that has a higher historical growth rate but 1% fee and a self directed vanguard account, which would have a lower growth rate but lower fees. What I want is to understand are the higher fees worth it. Which as I understand it ...

It has been a long time, so I am rusty with my commands. I use a script to have reminders. One I have running will display "Meteor shower occurs after midnight." after 3 hours. Is there a way to prevent me from accidentally closing a terminal which has my timer script running?

There is a statement that is Siegel upper half plane of genus g, $\mathbb{H}_g:=\left\{Z=X+i Y \in M_n(\mathbb{C}) \mid X, Y \text { real }, Z=Z^{T}, Y=\operatorname{Im} Z>0\right)$ is isomorphic to hermitian symmetric space $Sp(2g,\mathbb{R})/U(g)$. So how to prove this statement? How to constru...

I don't completely understand the distributional character of a quantum field because I never see them "smeared" in basic textbooks. As I understand it, if $\chi : \mathcal{F} \rightarrow \mathbb{K}$ such that $$ \chi[f] = \int\limits_{-\infty}^{\infty} f(x) \chi(x) \text{d} x,$$ then $\chi$ is s...

We have the adjective "facial" for the noun "face", and I am wondering what the counterpart for the noun "head" is. I could not find it on Google, and ChatGPT told me "cranial" which seems a bit different from what I expected.

Among Tetrapods, flight has mainly evolved three times. Firstly among the Pterosaurs - on the front limbs. Then among the Birds - on the front limbs. And finally by bats - mostly dealing with front limbs as the flight control. So, my question is, given a situation on an alien planet where six-lim...

I'm workshopping a medieval fantasy setting and one of the primary locations is a large port city, located on a bay out to the ocean. I'm still early in development, but since this settlement is quite large and located relatively close to borders with another country, I'm working out its defenses...

I have some skeleton templates for some file types, but when starting a new file that use them the cursor starts at the beginning of the file. It would be a little more convenient if it started with the cursor at the bottom of the file. I am hoping that there is a way to add some sort of command ...

In English, we have the word "tear", which has at least 2 unrelated meanings: Tear like paper (verb or noun). Tear like tear drop (verb or noun). Here are more examples in terms of English (including homographs, words with the same text, which is what I'm wondering for Chinese). In Sanskrit, we...

In Statistical mechanics textbooks it is usually purported that first order phase transitions have a finite correlation length $\xi$. Why is that and/or how can we derive that?

I was told that the first sentence is usual but the second one would be hardly said. He got his memory back thanks to the album. He got back his memory thanks to the album. And I think both are OK and actually used in the reality. But someone insists the second is GRAMMATICALLY OK but not reall...

I've previously tried to define a meaningful notion of size for sets with this question. It turns out that the notion I tried to define was more then related to the one of measurable cardinals, which can not be proven to exist in ZFC. I'm now here to ask for what I hope to be an weaker version of...

I've seen that in some videos or photos of the moon mission the bootprints appear brighter relative to the untouched ground. But in some other cases, they are the same brightness as the ground Is there a specific name to this phenomena?

I’m trying to replace my pedestal sink with a newer sink. While trying to disconnect the water line to the sink, I noticed that the valve stem is soldered into the valve itself. Also, the stem is not flexible. I tried loosen up the nut from the base of the faucet, but it won’t come off. Should I ...

Lets say I have students and classes which are 2 entities. A student can take many classes and a class can have many students. This would be a many to many relationship. To solve this with an RDBMS my understanding is that one would create a joining table, so the tables would be: student table s...

I have a Top command that I use to see what's going on in my server: ps -eo pid,cmd:50,%mem,%cpu --sort=-%mem | head 20 Basically it's using ps and removes a bunch of columns. For each process id I can use pwdx to see where is the source directory. However, I'm stuck at joining the pwdx to the o...

I have letters to write. Is the post-modifier "to write" forming a noun phrase with the noun "letters"?

In the movie, the Ballad of Buster Scruggs, when Buster Scruggs is about to have his last duel, he says: Another young fellow has something to prove, I gonna set myself up in the undertaking business, stop doing all the skilled works so another man can profit. My taking of his statement is: Fu...

Starting from a table with fields: "ID" (14 digit string) "COND" (numeric) "CDC1" (1 digit string) "CDC2" (1 digit string) The goal is to concatenate with an Expression these four fields, but the COND field should have a length of 4 digits once concatenated. In other words, it would have to be fi...

Water is starting to seep out of the seams of the vinyl in my bathroom floor when stepped on. I also noticed the toilet caulking seems to be separating. I am not sure exactly where the water is coming from, my thoughts was Water from stepping out of the shower. Toilet is leaking underneath? (Not...

How do we add custom sorts like Most View and Best Selling products in the API of Product List in Magento 2? I need to add the most views and best-selling products in /V1/products to this API using search criteria. eg: http://domain.com/index.php/rest/V1/products?searchCriteria[page_size]=10&sear...

I am trying to find a manga/manhwa I read a few years back, where I remember only parts of the plot. Sadly, I can't say whether it is a manga or an manhwa. Here's the plot: A male main character (MC) with dark hair arrives in a fantasy world with his mind linked with a female clone of himself. Th...

Just made aware of this newly proposed bill at the French senate, proposes punishment to who insults Israel Translation to item 3: Insult committed against the State of Israel, by one of the means set out in the same article 23, is punishable by two years of imprisonment and a fine of 75,000 eur...

I am trying to plot the given below, however, I am not able to plot it. w0 = 1200*10^-6; \[Lambda] = 532*10^-6; z0 = (Pi*w0^2)/\[Lambda]; wz = w0*Sqrt[1 + (z/z0)^2]; p = 0; l = 2; z = .015; A0 = Sqrt[(2*p!)/(Pi*(p + Abs[l])!)]*1/wz; \[Phi]g = ArcTan[z/z0]; Rz = z (1 + (z0/z)^2);...

I'm running Big Sur (MacOS 11.7.10) on an ancient, 9-year-old MacBook Pro. I recently received an update notice for Microsoft Office 16.77.1, but I'm not being allowed to apply that update, because it requires MacOS 12, which I don't think is available for a Mac that's as old as mine. It turns ou...

This has probably been asked a thousand times but whatever. Wanted to ask one more time though to just get the "what ifs" out of my head. I failed two subjects in uni in my first year (they were first year courses too), one CS and one maths. Obviously, as the title says, will this effect my emplo...

Your task is to write 2 functions/programs. They may share code. The first function must, given a string and a character, output a new string that does not contain that character. The second function must, given the string from the previous function and the excluded character, reconstruct the ori...

If you're surprised, you can't move or take an action on your first turn of the combat, and you can't take a reaction until that turn ends. (PHB) Because I am not a native Englisch speaker: Does the quoted rule means that a surprised creature can move OR act but not both, or neither moving AND ...

In my electricals beginner class I was given a paper about memory circuits. There was a small section about how writing data to a single memory cell worked. Here is the sketch of the memory cell: My paper is written in norwegian and "Resten av systemet" means "rest of the system". The thought pr...

I own one of the great Logitech MX Keys keyboards. (Dunno what the recent "business" naming is about). I am really fine with it. Now, my current employer does not allow wireless keyboards of any kind (Bluetooth or otherwise). It must be wired. Although the MX Keys series do have a USB connector, ...

By "spacing accumulation", I mean the resulting spacing when two \vspace{} commands meet. For example, let's say you set an after-skip for the figure environment and a before-skip for a chapter section. When these two skips meet, they will produce a double-spacing. I know \vspace{} will always di...

There is a game for two, which is an NxN field (always the same size). Players take turns. The first player's goal is to connect the two points (not necessarily at the corners) given on this field. The path from one point to another is a continuous chain of points. The second player's goal is to ...

I suspect that like myself, a lot of other users on this site are software developers and are also on Stack Overflow, so hopefully this isn't considered too off topic/niche... When Hashem creates Adam, Adam is described as being betzelem elokim - in Hashem's image. I think that different profess...

How are conjugation endings (たい, た, ない) called by Japanese linguists*? Examples: 食べた tabeta 'ate', 食べない tabenai 'do not eat' According to Wikipedia, and an electronic dictionary, it seems they are considered 助動詞 jodōshi. I still wonder if they are not classified as other parts of speech (for inst...

I was reading the book (Almost) Impossible Integrals, Sums and Series. The author used a method involving taking partial derivatives of the Beta Function to solve some integrals. $$B(x,y)=\int_0^1u^{x-1}(1-u)^{y-1}du$$ Substituting $t=1-2u$, we get $$2^{x+y-1}B(x,y)=\int_{-1}^1(1-t)^{x-1}(1+t)^{y...

I am in the UK. I have won an online gaming competition in an extremely toxic American community. The prize is about $500. I do not wish to give any identifying details to this community. The prize giver is very understanding and is happy to transfer the money in whatever way I request. How can I...

Assuming a 3.5" or 5.25" diskette placed on a surface with its label side facing upwards, which side of the magnetic disc within does head #0 of the drive reside on?

If $f(x)=\sqrt{\sin^{-1}({\frac{1}{1+3x+2x^{2}}})}$ , then what will be the domain and range of $f(x)$ ? I am trying this question by finding the domain of $f(x)$ first. So, $2x^{2}+3x+1\neq0$ . Now $2x^{2}+3x+1=(2x+1)(x+1)$ . Therefore $x\neq-1/2,x\neq-1$ . Now lastly what I can guess is that $-...

I am trying to fetch two events from a contract on Goerli. One of them is being fetched correctly but the other one doesn't. The working one : let eventFilter = Core.filters.AddChannel();//Core is the contract instance, and it is correctly initialized. let events = await Core.queryFilter(even...

I have long mp3 audio file in which a particular short sound repeats. I wonder if it is possible in Mathematica to cut the initial mp3 file on several mp3 files that ends by this short sound?

My memory is playing tricks. I'm trying to remember a novel I read probably late 90s, early 2000s. Set in roughly modern day. Space station orbiting Earth is a secondary objective in the plot because it has some ability to interfere with the primary objective. A key part of the plot was the comma...

I'm working on an environment, where my C: directory is rather small. However by default, QGIS caches intermediate processing results there. Some processes are failing, due to size issues. I want to change the cache directory, but haven't found a clear setting to do so. Under Network there is the...

If $|G| = p^nq$, with $p\gt q$ primes, then $G$ contains a unique normal subgroup of index $q$. Why does author mention both unique and normal? Subgroup of index $q$ is Sylow $p$-subgroup of $G$. So uniqueness $\iff$ normality. Showing uniqueness is relatively easy compared to normality. Here i...

I've created a custom LWC that is an SVG graphic used to replace a normal field. The idea is that the user can click the svg in different areas and it will update the field value in the background. I've added it to the page layout in the Lightning App Builder. The issue I'm having is that it only...

I have a HP Proliant ML380p Gen8 server with a P420i controller where one of the logical drives suddenly failed. Screenshot Smart Storage Administrator From what I could see in the Smart Storage Administrator, none of the physical drives in the array seems to have a problem. It gives me the optio...

Can anyone suggest existing technologies that must account for, or even use, electromagnetic momentum? I believe one example to be confinement in nuclear fusion; but momentum there appears in an averaged form, as pressure. Just to give an idea of what I mean with "existing technologies": general-...

If the PC has damage reduction 5/bludgeoning because of wearing an magic item could the shadow's incorporeal touch damage do 1 on 1 or the DR decrease it the amount of 5?

I remember this discussion that it was practically impossible to distinguish between Taliban fighters and non-combatant civilians because they were not organized like a traditional army - the groups of fighters would just "dissolve" into villagers once they were on the back foot in a battle. Mayb...

Is it true that for some real $K>0$ and all real $u\in C_0^\infty((0,1))$ we have $$\int_0^1 (u'(x)^2+u(x)^2)\,dx\,\int_0^1 u(x)^2\,dx \le K\Big(\int_0^1 x\,u'(x)^2\,dx\Big)^2\text{ ?}$$

Say that I have a variable with lots of 0 values that needs log-transforming so I do log(variable+1) to transform it. How do I write that in my methods section as opposed to just 'the data was log-transformed to increase normality' etc. Say that I transformed height and weight. How would I write ...

I wondered what the community felt about the above question. Are we conceived with innate knowledge and understanding of this world? Such as a preconceived notion of the meaning of words and the structure of language. Or do we only understand the world by our experience of it and language and com...

Do states have the authority to preclude candidates (Donald Trump) from their 2024 ballots? It would seem that he may have run afoul of the 14th amendment, which in that case would bar him from holding office again? https://abcnews.go.com/Politics/14th-amendment-challenges-trumps-candidacy-suprem...

At this moment I run into some database performance problems for a SaaS application. During the day the RESOURCE_SEMAPHORE wait stats shoot up to 30 to 60 seconds for 1 or 2 minutes. During that time I also receive one or more Severity 17 alert mails from our server with the warning "There is ins...

Looking at the North American electrical regulations, I come across the concept of GFCI protection in electrical outlets. In contrast, in the IEC regulations, differential protection is comprehensive and is required in the main electrical panel of residential installations. Does the North America...

A contrived example: You connect the fuse of a bomb to a 50/50 randomizer and take it for a walk across some public place. You get lucky with the randomizer and the bomb doesn't go off. Can you still be legally charged? I understand that planning a crime can be illegal, but here you just allo...

Ezekiel 33:11 "Say to them, As I live, declares the Lord GOD, I have no pleasure in the death of the wicked, but that the wicked turn from his way and live; turn back, turn back from your evil ways, for why will you die, O house of Israel?" ESV. My emphasis. Is "no pleasure" just to do with "...

Try to solve this system of equations: $$ S_1=x_1+\dots+x_n=a;\\ S_2=x_1^2+\dots+x_n^2=a;\\ {}\cdots\\ S_n=x_1^n+\dots+x_n^n=a; $$ And find the value of $S_{n+1}=x_1^{n+1}+\dots+x_n^{n+1},a\in\mathbb{C}.$ Now, by using Newton's identities I have find that $$\sigma_1=\sum x_i= a,\quad \sigma_2=\su...

I am building a small tesla coil (the OneTesla TinyTesla) and my secondary coil has some small damage. Is this damage tolerable as long as the wires still have continuity, or does it need to be a perfect coil? I have already varnished the coil and put some packing tape on it, and would not like t...

I'm an aspiring linguistics student, not a professional, so my thinking may be misguided or elementary. In my personal research about linguistics, I have discovered many important theories and frameworks which seem to emphasize something binary, i.e., they divide things into two elements. For exa...

Problem I use QGIS expressions (tested in QGIS 3.32.3 Lima and 3.34.0 Prizren on Win 10) to create an array based on attribute fields like array("field1,"field2"). I have fields of type integer with value NULL. In the array, these are represented as 0, thus a numerical value. I expect it to be an...

Laplace proposed that a being that could know the state of the universe at one particular point in time and knowing all the laws governing that universe would be able to determine the past and future events from that state. Rather than that Demon to be a being or a machine within that universe, c...

Background USB pins D± are used for: USB 2.0 data transmission Battery charging (BC 1.2) Question Can D± be used for USB 2.0 data transmission and BC 1.2, or does BC 1.2 preclude the use of USB 2.0 data transmission? Added background Continued from this question.

I'm having trouble understanding common mode voltage and its application when analysing a circuit. Let's say I have an op-amp in the following configuration from Sedra's Microeletronics book: simulate this circuit – Schematic created using CircuitLab Using node analysis I arrived at the expres...

I'm looking to create a fabric canopy in a room (6m x 6m by 3m high), whereby the fabric is scrunched in the centre of the roof (like the image) however the fabric also drapes down the walls too. Any help would be amazing! I'm new to blender and this is quite complex so I'm struggling using tutor...

I moved to a new EC2 server (Linux 2) and have installed everything I thought was needed. However, now when I login to the back end of my Wordpress sites, I am no longer able to "edit" (crop, resize, etc.) images - like a featured image. No image is shown when I click "Edit Image". I have tried t...

Let $C$ be a category with finite products (and a terminal object). We can then define group objects as tuples $(G, m, e, inv)$ by requiring that the usual diagrams commute. Is it true that the morphism $inv : G \to G$ is always an isomorphism? It is certainly true for e.g. $C = \mathrm{Set}$, $C...

I'm trying to predict the probability of an individual progressing all the way through a series of tasks. I have participants, they participate in Task 1, if they succeed, they move to Task 2, if they succeed they move to Task 3, if they succeed at Task 3, yay! I want to predict the probability o...

using: neofetch --stdout |grep 'OS:' OS: Kubuntu 22.04.3 LTS x86_64 After zeroing disk with: time sudo dd if=/dev/zero of=/dev/sd_ bs=1M status=progress #Zero_disk_delete_wipe We have a raw disk = All zeros = unrecognized is term stated by fdisk -l With a raw disk, before doing e...

I remember seeing, probably in the 90s, a short movie with a nerdy insurance salesman who decided, for reasons I can't remember, to summon a demon. He successfully summoned two, one traditionally demonic, and another which understood a lot about insurance. I remember the summoner passed a policy ...