According to Faraday's law of induction and Ampere's law, a changing magnetic field causes curl of electric field simultaneously; and also a changing electric field causes curl of magnetic field simultaneously. By combining these equations, the equation of electromagnetic wave is derived. I thoug...

I aim to make the derivative's pricing theory abloslutely clear for myself, starting from the beginnigs. Before turning to risk-neutral measure and Radon-Nikodym change-of-measure, I'd like to price an Arrow security. Suppose there is some market event $A_T$, and we bet on it: someone suggests us...

Is Goodness Triumphant Over Evil? Apparently not. Goodness is honest and plays with open cards, while evil hides its hand until the very last moment. Goodness can hardly compete with evil unless it distances itself from its own nature and steps into evil's territory. But where does the problem li...

When 4−pentenoic acid is treated with $\ce{I2}$ and $\ce{NaHCO3}$, it gives 5−iodomethyl−dihydrofuran−2−one: But why does the electrophile (in this case $\ce{I+}$) is attacking the pi bond and not attacking the oxygen which is electron rich and probably also have negative charge due to formation...

I'm sorry for my MWE too big. However I don't know how to make it smaller in this case. I want to use tcolorbox to frame latex code. Unless I'm mistaken this code worked under the texlive 2017 distribution. Now with Ubuntu 24.04LTS and texlive 2023 I have a slight typo that appears. here is the f...

There are certain things that seem to contain incoherence by its very definition such as a triangle pentagon. This concept can also not be imagined. On the other hand, other things may not on the face of it contain obvious semantic incoherence such as a “mind existing outside of time” but is also...

I've got a fairly old PS/2 keyboard with 125 keys, of which some only emit scancodes, which are not tied to any keycodes. Now I'd like to start setkeycodes as a systemd service to assign keycodes to these "problematic" keys. Running evtest, however, shows me some strange keycodes, which do not co...

A few days ago a high schooler asked me this question to which I couldn't give an answer. His main question was that acceleration is also a property of a moving body so why is Kinetic energy which keeps track of energy associated with motion doesn't include the acceleration explicitly? Of course ...

I know that both diodes in an NPN BJT transistor is forward biased under saturation mode. I also know that when a npn bjt transistor is saturated, it acts as a short circuit between collector and emitter. This means that Ic = Ie. I also know that this means that current flows from collector to ba...

I want to experimentally measure input impedance of an RF amplifier that I have previously built for use in the 88-108 MHz range. An LTSpice simulation says that I should have an input impedance of ~20 ohms at my frequencies of interest. I have no clue what the true value is, or might be. On pape...

I'm thinking about using same-day standby for an upcoming flight on Southwest Airlines. I would like to check a bag and am wondering how the timing works. Southwest has a general rule that the earliest you can check a bag is four hours before departure. So let's say I am booked on a flight depa...

It was included in an anthology I read in the 90’s. Basically Bela Lugosi is filming Dracula and at the end of a long day, he gets high on morphine and hallucinates meeting Vlad Tepes.

We have an indoor cat, she uses the basement for her litter box. The interior door is a 24” X 80” hollow door providing access to the basement from the kitchen. I'd like to put a cat door in that internal door to allow her free access up and down to the basement keeping the dogs from getting in...

I need the expression of the function $G(x)$ for which I have only the Fourier transform: \begin{equation} G(x)= \int_{-\infty}^{\infty} \frac{ dp}{2 \pi}e^{i p x} \frac { \sinh\left( \frac{ \pi p(1-\alpha)}{2 \alpha} \right)}{2 \cosh\left( \frac{ \pi p}{2} \right) \sinh\left( \frac{ \pi p}{2\a...

My .bib-file is not compiled correctly into .pdf-file. Does anyone know how to fix that? Linked crowded question of the whole project see Migration of thesis written in \documentclass{DissOnlineLatex} to \documentclass [12pt, a4paper, oneside]{scrbook} \documentclass[12pt, a4paper, oneside]{scrbo...

i'm trying to get the IPA notation for each new French word i learn. i have also learnt how to pronounce each phoneme individually, for example, /e/, /ʒ/, /ʁ/ etc. the problem is that learning the IPA is not enough since each syllable can have more than 1 phoneme, for example, the IPA for réveill...

緑をかき分ける。巣を割られた羽虫たちが苛んで追ってくる。自分は必死に斜面を駆けた。前のめりに、けれど膝だけはつかないように、 The character is running through jungle and his narration says this. i get what the sentence is saying but what to make of けれど膝だけはつかないように、? I understand it's "so only my knees don't" but what is the actual verb?

TL;DR I've got high resistance between the ground on two different outlets near each other. Background In my garage, I have two outlets in my garage right next to each other, a 240V NEMA 14-50 and a typical 120V NEMA 5-15. The 240V is a pretty new run. I had someone do it about 5 years ago. The 1...

Before the early Sh'ma in Brachot, we say the paragraph beginning with (from the Sefaria Ashkenazic davening) לְפִיכָךְ אֲנַֽחְנוּ חַיָּבִים לְהוֹדוֹת לְךָ וּלְשַׁבֵּחֲךָ וּלְפָאֶרְךָ וּלְבָרֵךְ וּלְקַדֵּשׁ וְלָֽתֶת־שֶֽׁבַח וְהוֹדָיָה לִשְׁמֶֽךָ: some of my siddurim don't have the bolded word, ...

I saw this TV show in Australia sometime between 1995 and 2005 (I think). It was British, set in Glasgow, possibly a BBC Scotland production. What else I remember: I remember it as having four to six episodes, but it's possible it was a telemovie. If there was a second series, I'm unaware of it....

The Book of the Wisdom of Solomon is found in the Apocrypha and is used by a number of Christian groups. Notably, for our purposes, the Ramban quotes it in his introduction to his commentary on B'reishis. He says: וְרָאִיתִי הַסֵּפֶר הַמְתֻרְגָּם הַנִּקְרָא חָכְמְתָא רַבְּתָא דִּשְׁלֹמֹה, וְכָתו...

I am writing a reference letter for someone applying to a university in Canada. The site (ubc.ca) where I submit the reference letter states: It is the policy of the University to treat reference information as confidential. It can, however, be required under Freedom of Information legislation t...

A stationary observer sees two boxes A and B explode at the same time. A is close to the stationary observer and B is far away. For a moving observer moving towards the two boxes, they will see B explode first and then A. Why does the moving observer intuitively see Box B explode before Box A? I ...

I am working on a Metaphysics paper defending Parfit's psychological continuity and connectedness criterion for survival and need help formulating an objection, responding to the objection, and advice on whether or not it is completely misguided and how it can be reformulated if so. The rough ide...

I am unable to understand why we can label mental states. Intuitively I would think that no two mental states are equal. My mental state when I was happy 2 weeks a ago was not the same as when I was happy today. The state of happiness was not identical, nor can I fathom how any two mental states ...

A person who possesses a vision and expertise in both programming and design, capable of producing an app or software that is unique and superior, has a singular, undiluted vision. There are some well known apps and games made by one person who had a vision and attended with great professionalism...

I feel this question is trivial, but still I wanted to present because I see it causing some problem at math education at primary school level. It is actually a question related to math education and its ease in the sense of securing it from causing unwarranted mistakes at root levels in mathemat...

In the UK there is definitely a perception that the Civil Service is the preserve of privileged Oxbridge graduates, possibly even only those who came from public schools (Eton, Winchester, etc) - it is debatable how true this perception is in the modern day, but certainly it was felt strongly eno...

I regularly have the issue that I want to license some work in a way that it is free to use and modify, but copies and derivative works have to have the same or a compatible license. Sometimes I want to add for non-commercial use only. But I do not want to add the requirement for attribution of t...

I'm building an arcade cabinet and I have a computer as the source of the audio and a small powered amplifier for the speakers. I'm using a 3.5mm headphone cable to connect the two. This is working just fine but I'd also like to have a volume control and headphone bypass in the loop, so if someon...

When discussing the fundamental nature of reality, physicalists often argue that, as far as we can tell, everything that exists is physical. They contend that anyone claiming the existence of something beyond the physical bears the burden of proof: they must explain what "non-physical" even means...

I have conducted independent research, and wrote a paper based on it, and want to ask the opionion of some expert before submitting it to a journal. I am contemplating if I should ask someone or not? I met a professor at a poster session who gave an impression that he is interested, he is an edit...

I have noticed whenever working with free particles that the square amplitude of the momentum wave function $|\Phi(p)|^2$ ends up being time invariant, so I followed this chain of logic supporting the conclusion that this is always the case: $$\frac{\partial}{\partial t}\Phi(p,t) = -i\frac{p^2}{2...

Has there been boot sector code (either as binary or assembly source) released, which can boot MS-DOS and PC DOS, by autodetecting the files found in the root directory of the FAT12 or FAT16 filesystem? (It loads io.sys and msdos.sys, or ibmbio.com and ibmdos.com, whichever it finds. If it finds ...

This is a question that I'm sure has been investigated before, but I have found no good search terms for. Let $X_i$ be a sequence of random variables, independent and uniformly distributed in $[0,1]$. Let $Y_n=\min(X_1,\dots,X_n)$. Is there an asymptotic which $Y_n$ almost surely follows? More p...

My interest in nonstandard analysis and its applications to physics is growing; however, it seems to me that most authors do not develop nonstandard analysis within ZFC. Specifically, I’ve read about the first hundred pages of Robinson’s book, where the author doesn’t even use first-order logic. ...

The book starts with the protagonist (young girl) climbing a mountain and getting kidnapped by a young male vampire. She has to live with him as a servant, and at first she's afraid, but later she feels sorry for him. He's very beautiful but has no emotions because his soul has been stolen by t...

I am trying to understand what would be the best way to model such filigree type of geometry: There are many tutorials how to make such ornaments on flat surfaces but I am struggling to find a good way to model it on any type of more complex 3d objects. What would be the best technic and tools?

The separation axiom KC (Kompacts are Closed) implies the separation axiom US (Unique Sequential limits). In ‎sequential ‎space it was shown that, for sequential spaces, US is equivalent to all countably compact sets being closed. Is there a similar characterization that does not require the sequ...

I hover above where the sun can't hide, A fiery glow, stretching far and wide. Atop the head, I mark a line, Where bones meet, a boundary fine. In structures tall, I take my place, Above, a feature, flat in space. A fringe I form in creatures small, Helping some to swim or crawl. In plants I...

A neighbour gave me a road bike, it's a 2007 Condor Squadra from "Condor Cycles". It's a aluminium/carbon frame with Campagnolo Chorus group set. Wheels are Campagnolo 700c DPRO Zonda with 15mm inner width. It's a nice bike, the previous owner said that it's been ridden on alpine tours events and...

Making sauerkraut, I used bags to weigh cabbage down, bag leaked and now the cabbage is submerged under the water. Should I remove some of the water?

A well known fact, electrons are ejected in Photoelectric effect, if the energy of the incident radiation is high enough to surpass the workfunction of the metal. However, only 'elctrons' are ejected, I wonder why not photons or neutrons? Certianly one might say they have high Nuclear Binding Ene...

I’m new here and do not have access to a computer (am using my phone), so hopefully you’ll pardon me for not employing LaTeX. My question is as follows: Let $a>0$. The sequence $(x_n)$ is defined by: $$x_{n+1}=1+\frac1{x_n}\text{ and }x_1=a.$$ Prove that the sequence is Cauchy, strictly by defin...

I am training for a Symfony certificate. I found a Github repository providing questions to prepare for the exam. The repository contains a data directory with a bunch of questions mapped by topic in Yaml-format. Because raw yaml files are not user-friendly to train with, I made a quick Python sc...

Looking for recommendations on how to water soil blocks and what type of trays to use. I plan to plant tomato seeds in two inch blocks. After the are big enough I’ll put them in deep into cups for further root development

I want to print the intermediate values of the quantum circuit while training in the following code which is part of the hybrid quantum-classical network. The main issue is when measuring values then the quantum circuit values are not retrievable anymore! import pennylane as qml n_qubits = 8 d...

Antennas are sensitive devices. If you place a piece of metal near or put your hands around an antenna, you can see its s11 change rapidly, and its s11 below -10 dB band disappears. I've played with VNA and antennas and couldn't find a way to save antennas from hand-blocking. How can mobile devic...

I was trying to solve this equation over here. $\begin{bmatrix}a&b\\c&d\end{bmatrix}^2 = \begin{bmatrix}-1&0\\0&-1\end{bmatrix}$ I realize that there are some obvious ones like $\begin{bmatrix}i&0\\0&i\end{bmatrix}$, $\begin{bmatrix}-i&0\\0&i\end{bmatrix}$, $\begin{bmatrix}-i&0\\0&-i\end{bmatr...

Image processing: I'm looking for an interpolation/fill function that takes as an input a mostly black image with some scattered color shapes (pic 1). The function should fill all black pixels based on distances to the nearest color shapes (pics 2, done manually). The filled-in interpolated color...

The following code solves Advent Of Code 2021 Day 10. The goal for this time around is evaluating whether a line of brackets is complete, has a syntax error or is missing some closing brackets. Examples of valid pairs of brackets () [] ([]) {()()()} <([{}])> [<>({}){}[([])<>]] (((((((((())))))))...

At QGIS 3.34.13 I have an .sdat (Saga) raster file, single-band, 8-bit unsigned integer, pixel size (meters) 30, -30, CRS ESRI:102039 - USA_Contiguous_Albers_Equal_Area_Conic_USGS_version. The data is located in Washington State, USA. I need to: reproject to EPSG:26910 - NAD83/UTM zone 10N conv...

Looking at the structure of cubane $(\ce{C8H8}),$ it appears as if the molecule were composed of six rings. However, numerous authoritative sources call the cubane a pentacyclic hydrocarbon. What is the reason for this?

Several of my worlds have satyrs and fauns, which are horned human-like (and human-related) bipedal people with a short tail and two-toed ungulate legs like the hind-legs of a deer or antelope, or single-toed ungulate legs like those of a small horse. Considering that these people exist in a plac...

I'm writing a section title including math symbols on Overleaf. I have used \texorpdfstring to aviod errors. But I don't know how to display these math symbols correctly in PDF bookmarks. I did read many posts on StackExchange, which suggested to fill out Unicode characters in the second {} of \t...

Suppose there are 2 points A and B. We can go from A to B through 2 paths, path 1 and path 2. Path 1 has 0.9 probability of being blocked out (unable to use path 1 to go from A to B). Path 2 has 0.8 probability of of being blocked out. What is the probability of success in going from A to B? Si...

A newly appointed professor in Computer Science from an European institution informed me that there is no available PhD position right now and suggested "keeping in touch as there could be potential opportunities in the future." I'm extremely eager to seize this opportunity. How often should I ch...

We hired a graphical designer who made us fancy visualisations for our paper.We signed the contract and paid him. He gave us the files and transferred copyrights to the university. Now, at the production stage with Springer Nature, they asked for copyright from the owner (in English). What shall ...

Arrange five different dominoes as in the diagram below such that adjacent squares of two different dominoes contain the same number of spots AND the total number of spots in the three horizontal dominoes is 5 AND the total number of spots in the two vertical dominoes is also 5. Attribution: Ia...

Normally I just use the set_servo_pulsewidth() method (which is "hardware timed"). I understand that this pulse width is managed in software, and that to use hardware PWM, I need to use hardware_PWM() instead (on the two GPIO channels that support it). What advantage is there in using hardware PW...

We see in 2 Samuel 23 that David expresses how thirsty he is: 15 And David had a craving and said, “Oh that someone would give me water to drink from the well of Bethlehem which is by the gate!” 16 So the three mighty men forced their way into the camp of the Philistines, and drew water from the...

Let $\{X_i\}_{i \geq 1}$ be a sequence of iid uniform random variables on $[0, 1]$. Define, for each $n$, the order statistic $O_n$ of $X_n$ by $$O_n := \frac{1}{n}\#\{1 \leq k \leq n \, \, | \, X_k \leq X_n\},$$ where $\#$ denotes the cardinality of a set. Question: Is it true that $|X_n - O_n| ...

In Thoburn v Sunderland City Council, Lord Justice Laws defines a constitutional statute as one that conditions the legal relationship between citizen and state in a general manner or one that changes the scope of fundamental constitutional rights. He expressed the view that: "Ordinary statutes ...

I often hear Bitcoin Core 30,000, or something like that on Optech podcast. Can somebody please explain what these versions are? And if possible the process of merging the code into a new version like 28.0 for example. Like for example assumeutxo,do you merge it into bitcoin before the 28.0 is ou...

I have a report on a custom object A__c. There is a custom field there named User_Country__c, which contains country value of the record. The report is showing reocrds of all countries. But I need to show only for the current user's country. The user also have a custom field named Country__c. I w...

There is a function in the QGIS standalone processing tools that I cannot find in the Graphical Modeler: the iterator over features. Here is what I see in the "standalone tool" (i.e. the tool from the toolbox. ...and here is what I see in the same processing tool inside the Graphical Modeler: I...

The second and third sentences of David Copperfield are as follows: To begin my life with the beginning of my life, I record that I was born (as I have been informed and believe) on a Friday, at twelve o'clock at night. It was remarked that the clock began to strike, and I began to cry, simultan...

Last week's sedra. Yaakov was called Israel by the angel כי שרית עם אלהים ועם אנשים ותוכל. I could have thought that the word elohim refers to an angel, which is very apropo considering he had just fought with the angel and with men (Lovon and Esov). Or it could be referring to God. The targum cl...

I am a beginner at blender/3d modeling and I am trying to create a 3d model of an asian scroll. I've tried my best to draw the issue I'm having with the Blender Archemedian Curve Spiral. I am trying to replicate the effect of rolling up a scroll. A long piece of paper with wood attached to the e...

In Chapter 1 of David Copperfield, the narrator says: My mother was sitting by the fire, but poorly in health, and very low in spirits, looking at it through her tears, and desponding heavily about herself and the fatherless little stranger, who was already welcomed by some grosses of prophetic ...

I recently came across a non-native English teacher writing the following in a grammar exercise: The sports day is next Friday. We will have the final-year students to help us with the sports day. They will be selling tickets to parents and friends who would like to join the day. I only know the ...

Does anyone know where I could buy the book Hanosein Imrei Shefer (הנותן אמרי שפר) by Rabbi Yeshaya Naftoli Herz Spira of Dinov זצ״ל? I have looked in a number of different places and have been unable thus far to find a copy.

The excuses given are the situation is still very fluid unsure if they will become an oppressive dictatorship. continuity of use to avoid confusion However When Communism fell, Lech Walesa and the Solidarity movement were immediately not refered to as 'rebels". Even though the situation was s...

This is intended to be a self-answering question, which is allowed on StackExchange sites (see here). The Arens space is defined as follows: Let $X = \omega \cup \{\infty\}$ be the one-point compactification of $\omega$. The Arens space $S_2$ has underlying set $(X \times \omega) \cup \{\infty'\}...

Selling exceptions to FOSS licenses (e.g., like Qt) is okay, but changing a project's license from a FOSS one to a proprietary one (e.g., like Redis, MongoDB, and HashiCorp) is bad. Given a project released under a copyleft license, if external contributions are accepted with no CLA, then neither...

I have a japanese passport and philippine passport but it both has different signatures, is that okay when traveling to another country?

I have installed GDAL-3.9.2-cp313-cp313-win_amd64.whl using Anaconda and I want to perform coordinate transformations with simple command lines using gdaltransform. The issue I have is that the grid files needed for the transformation doesn't seem to be used. Ex : I am trying to convert from WGS8...

I have an object at (0, 41, 0). I want to delete the back half so the object looks the same from the camera at (0, 0, 0), but will cost less to 3D print. Perhaps I need to select and then delete vertices that are “behind”? But I do not know if this is the best approach, or how to do it. I am happ...

I am developing an little web application that should allow the user to »bring your own key« in order to encrypt, decrypt, sign and verify data within the browser. Looking at this table (algorithm overview) shows that not all operations for a certain type of Key are actually supported by the Web ...

I prefer to use the fish shell on macOS most of the time, but refrain to make it the login shell, because I think sometimes it may cause problems. So, I simply added exec fish at the very bottom of my .zshrc, and that's it. Which means my login shell is still zsh, and my $PATH modifications are s...

As a disclaimer, by “objective”, I do not mean “objective” in the sense of everyone agreeing upon a certain matter. By objective, I mean a certain notion of a probability that does not depend on the mind at all. Now, in games of chance, we often have defined probabilities for these games. The pro...

I understand what WRED is and what it does. I understand that once we exceed a certain threshold, it will start randomly dropping packets to prevent the queue from becoming full. I also understand that since it's weighted RED, it can be more strict towards low-priority traffic. This is all a basi...

Given the following SQL Server Agent job USE [msdb] GO BEGIN TRANSACTION DECLARE @ReturnCode INT SELECT @ReturnCode = 0 IF NOT EXISTS (SELECT name FROM msdb.dbo.syscategories WHERE name=N'[Uncategorized (Local)]' AND category_class=1) BEGIN EXEC @ReturnCode = msdb.dbo.sp_add_category @class=N'...

Peter Enns was expelled from the Westminster Seminary due to this positions judged too liberal in his book Inspiration and Incarnation: Evangelicals and the Problem of the Old Testament (2005). This article contains a comment of this affair, and provides "two reports authored by the conservative ...

The Everywhere doubled line is an interesting example of a non-Hausdorff manifold that is homogeneous. It is constructed by adding to every point of $\mathbb{R}$ another one, with the same basis of deleted neighborhoods (see pi-Base or [BG]). When exploring $\pi$-Base I found contractibility of t...

I have reviewed my note in British MO China Camp and one line of my note didn't make sense. It has been a while so I really forget how can I solve this functional equation. Please help. Problem: Find all functions $f:\mathbb{R}\to\mathbb{R}$ such that $f\left(xf\left(y\right)+f\left(f\left(y\rig...

I'm reading "Albert Einstein: Philosopher-scientist (Living Philosophers Volume 7 by Paul Arthur Schilpp)" (p. 668): Then it is possible for us, following Gamow, to replace the rest of the atom by a space of atomic order of magnitude, surrounded by a closed potential energy barrier which, at a t...

Our application has a filtering capability, where the database query is built dynamically as per the user entered filter values. Prepare Statements are not an option for us. All the filters are text filters, so we have the luxury to use IN keyword instead of the equals (=) operator. We're current...

The first portion of the first benediction recited before the morning Sh'ma praises God for having created astronomical objects. Versions vary among the different communities, and on the sabbath from weekdays, but one version is as follows; others are similar. All will thank and praise you, and ...

As mentioned, when I was reading TeX by Topic, I came across this passage: "In the plain format and the Computer Modern math fonts, there is only one radical: the square root construct \def\sqrt{\radical"270370} The control sequence \radical is followed by a ⟨24-bit number⟩ which specifies a sma...

I am trying to save some point cloud layers to disk without benefiting from the GUI export (that is to say using PyQGIS commands). The point cloud layers are results of earlier filtering that I applied on a .las file. So-far I found QgsPointCloudLayerExporter which theoretically should allow me t...

I just came across a spec sheet for the little-known Rockwell PPS-8. It states that development is possible on Tymshare, Genie, or "Rockwell TSO". Googling the latter turns up nothing, and I suspect this is actually IBM TSO with modifications? Anyone know for sure?

This is a follow-up of a question of mine (Why \AddToHook{env/figure/begin}{\centering} doesn't center the figures?) where @samcarter_is_at_topanswers.xyz gave me the nice trick \AddToHook{cmd/@floatboxreset/after}{\centering} which works nicely for automatically center floats with usual classes:...

Mo Demir is a master tiler, but he knew this task would be challenging - his friend, the famous mathematician Roger P. has asked him to tile the new bathroom. The customer has given him a full plan - it's looks pretty straightforward. Derek, the apprentice pipes up "Oh boss, I can do this - it'...

(One of) the whole point of general relativity, is that the coordinates we mathematically use are just "labels", that can change and live on a curved surface. But at some point we have to compare the computations to actual empirical evidence using physically observable distances and time. But in ...

I am trying to identify a Sci-Fi movie from the 80s. Amongst the 'good guys', there are three identical aliens with a form of telepathy that allows them to synchronise their body movements. They have humanoid bodies, and glow white. They agree to an arm transplant and so an arm is surgically remo...

I am able to add the panel at side bar of UI regin, but not able to add same panel at header section. I want to create button at header section, on click button panel should be visible and it should look like that panel is attached to button. In reference image you can see that the panel at sideb...

Thank you for reading. What I need to do is something sim ilar to this: I am using multicols package but I can't find how to do what I need. I need the section name on every new column on the document. But I need it automatically because it is a long document. Thank you.

I'm trying to identify a novel I read when I was a student. The novel could have been written by Philip José Farmer or Clifford D. Simak, but I'm not sure. A small group of people are on a quest, the goal is to save the world. The planet has suffered from violent events in the past. From the anci...