I'm trying to know whether a low R-squared value would pose a problem when assessing the coefficients. My population is divided into two groups (A and B), and I want to assess if there's a significant difference between them concerning the dependent variable. I've included several control variabl...

I created a custom node that generates trees, based on certain input values: height, n_branches, random seed etc. I would love to be able to distribute these trees on points, and to supply each with a value based on the points attributes (e.g, height can depend on a calculation based on the posit...

What does 'thwart mean in this poem by Caroline Elizabeth Sarah Norton? The poem is titled ‘A Destiny’: Shame, like a marble statue at his door, Flung her ’thwart shadow o’er his threshold stone;

I've recently started using the comint based github chat client https://github.com/chep/copilot-chat.el together with https://github.com/xenodium/chatgpt-shell . It allows a REPL like interaction with github copilot, which is great. However, the answer from github copilot is markdown encoded, but...

I read this humorous short story in a SF&F collection, more than 20 years ago. I am positive is it by a very famous SF writer but I forgot whom. It is a fiction, but in a world that, alas, could very well be ours. So technically, neither SF nor Fantasy, but because of its author and the decision ...

I have a series of random variables $X_n \sim Bin(n,p)$ and I want to claim that for every confidence level $c \in (0,1)$ $ClopperPearsonLower(X_n, n, c)$ converges in probability to $p$, that is for every $\epsilon>0$: $Pr[|ClopperPearsonLower(X_n, n,c) - p| > \epsilon]\stackrel{n\to\infty}{\lon...

Are there any rockets that leave extra fuel as a backup? For this purpose I mean fuel that is not intended to be used at any point during the mission. I’d imagine this could be useful in case of a non critical failure that increases the amount of propellant needed to reach orbit. Do any rockets d...

Say a rod of length L is initially held horizontally and hinged at a point 2L above the surface of the Earth. This rod is then released, and the question is to calculate its rotational kinetic energy when it's rotated 90 degrees and is vertical. My textbook just conserves mechanical energy by red...

How to apply refactoring on Latex code? Questions here on refactoring most frequently state, the OP did or wanted to do some refactoring on Latex code, but struggled with some technicality. Though the specific struggle was solved via this community, the process of applying refactoring hardly ever...

I have a circuit board that has come out of android TFT Car Display. I would like to know the part number of the small SOT23-5 integrated circuit chip that is on this board. I would really appreciate if anyone could help me identify this part or link from where I can buy this chip. The chip reads...

My 14 yr old son has an electric skateboard. Yesterday he came off it and banged his head slightly but enough to mark the back of the helmet slightly. Today however, he had a BAD fall which resulted in a tumble and banged the back of helmet then rolled and banged front as well as, scraping the si...

I have found mentions of \IfPackageLoadedTF in answers to question "Test if a package (or package option) is loaded", but I cannot find where in documentation it is described. So far the only result I have found with texdoc is \@ispackageloaded

Let $\mathbb{A}_{\mathbb{Q}}$ denote the topological ring of adeles over the field of rational numbers. Is its topology metrisable? If so, is it complete, separable under that metric? I believe that it might be metrisable but I am not able to come up with a metric. Any help would be greatly appre...

It's a 6-pin SOT with marking "|ATPJ". My guess is it's SOT-363 but I'm not entirely sure. Can you identify the actual part number for this.

I'm working on an underwater setting. Eventually, this setting will be a thriving farming paradise, and I'm trying to figure out what plants would grow best in these conditions. (This question might be better suited for the gardening or science stack exchanges, but I'm putting it here for now). T...

A few months ago I read Fagles' translation of Oedipus Rex, Oedipus at Colonus, and Antigone. I've just started to read Fitts and Fitzgerald's translation of the same. In both translations I was thrown off by their writing "God" (capital, like the Christian deity) in some passages — since I don't...

I'm trying this circuit, and variations of it, to control a mini servo motor. The circuit uses two 555 timers to generate a constant-frequency PWM signal with adjustable duty cycle to control the servo. (the output in the figure is connected to the input signal of the servo). I tried powering it...

Can somebody help identify this connector. It's a plug on the circuit board of a CCTV control box. The 2 pins are 8 mm apart and at the other end of the wiring is a power on/off rocker switch. The plugs dimensions are L 18 x W 12 x H 5 mm.

I read a short story many years ago about a man that was accidentally suspended due to a medical procedure. He is discovered by a scientist digging up metals in what was an old cemetery. The scientists revive him and keep him sequestered. He escapes and finds society has lost their IQ and the ...

I am about to order 12x20 shed kit and need to start building concrete slab. Can I throw 3inch gravel and 2inch concrete on top of the gravel? Or this wouldn't last long? I can pour all concrete but it is going to cost a lot, So I am looking for cheaper option by putting gravel under neath.

Let, for each $i\in I$, $\left(X,\mathcal{O}_\mathcal{X}\right)$ and $\left(Y_i,\mathcal{O}_{\mathcal{Y}_\mathcal{i}}\right)$ be topological spaces. Does the following equivalence hold: $$\mathcal{O}\text{ product topology on }\times_{i\in I}Y_i  \\⇔  \\ \bigg( ∀f:\left(X,\mathcal{O}_\mathcal{X...

And since they are most adaptable - why did not they conquer other races yet? It seems to me they outnumber, outsmart all others. What do other races do to defend against them? I'd like to know it in a way like "rock paper scissors" - tyranids have X but the humans have Y etc

Let A = x^2 and define a function f[x_] := A Computing D[f[x],x] gives 2x, as expected. But f'[x] gives zero. Why is this? Does this mean that D[f[x], x] and f'[x] are not really equivalent? This problem does not arise when using Set: f[x] = A. Then both D and ' give the same result.

I need to know if when I’m using my hotspot, does it also use up my home WiFi? I’ve asked multiple people that question and as of yet, not received any clear answers. I go to my smart tv and go to settings then choose my iPhone as my option for wireless. I want to know if my Hugh’s net is working...

A young African girl in a village who is supposed to be married. She bonds with a magical beast. On the other side of the world, a young teenage boy bonds with, I believe, a hawk or bird of some kind. I believe there was also a bear. They had a destiny to save the world.

Adding more than one image as album art to mp3 via command line was already explained at Superuser. I would like to know how to do this for m4a audio files to have a front and back cover.

Why do the force-mediating particles for the electromagnetic, strong, and weak forces have a spin of $1$, while the mediating particle for gravity is hypothesized to have a spin of $2$?

At first, I thought it was impossible to create such a situation since the side creating the stalemate usually has the freedom to not stalemate (and take an insufficient material draw instead). But after reading other Stack Exchange stalemate questions, I found a position that works. Are there an...

I am trying to create a Blender window that has no UI elements, only the 3D Viewport. Specifically, I want to remove the top bar. Is it possible to do this using the Python API?

Coming from here and the Wikipedia page on conservative extension, which defines a proof-theoretic conservative extension like this: a theory $T_2$ is a (proof theoretic) conservative extension of a theory $T_1$ if every theorem of $T_1$ is a theorem of $T_2$, and any theorem of $T_2$ in the lan...

It is easy to spot texts in Japanese that use western-style commas (，) instead of tōten (、読点), and some that even mix them. Are there any rules for the use of one or another?

The Romans 9:13 passage is derived from the Malachai 1:2-3 scripture where hated is hebrew not greek so should we look at scripture in the new testament that is from the old testament in a Hebrews translation light since Hate is not as strong of a meaning in Hebrew as it is in Greek does this mean "

We define MAX-CLIQUE = {<G, k>| G is an undirected graph; the largest clique of G has k vertices}. First question: I need to prove whether this language is in NP or in coNP. Second question: assuming P=NP, is this language in P? if so, I need to build a TM for it and show it runs in polynomial ti...

Let $\{p_j\}_j$ be a set of probabilities, $\sum_j p_j = 1$, let $\{h_j\}_j$ be a set of $n \times n$ Hermitian matrices, and define $ad_h(A) $ be the adjoint. Define the following linear mapping $$ E(A) = \sum_j p_j e^{-i \ ad_{h_j} }(A). $$ Does $E$ have a trivial kernel (and is therefore inve...

I can't remove the solder from the pads. I want to remove the capacitor and remove all the solder but I can't get it to melt. I've tried going to maximum temp, 480C. I tried using flux and solder wick. Nothing will remove it. I don't understand how it won't melt at 480C when I originally added it...

I am trying to fill the area between two curves with fill between, but I get the "Missing number, treated as zero" error. Without that line, it compiles fine. It should not come from my installation, as I get the same issue on Overleaf. Here is an MRE: \documentclass{article} \usepackage[english]...

Consider the following linear functions: $$ \left\{ \begin{aligned} f_x(x,y) &= 2x + y \\ f_y(x,y) &= x + 2y \end{aligned} \right. $$ This is equivalent to the matrix $$ A = \begin{bmatrix} 2 & 1 \\ 1 & 2 \end{bmatrix} $$ We can diagonalize this matrix: $$ A = PDP^{-1} = \begin{bmatrix} -1 &

I recently learned from this article that flammability in oxygenated environments is far more dependent on the concentration of the Oxygen in the air rather than the partial pressure of the Oxygen. In other words: fires will burn better in air with more Oxygen percentage (relative to the other ga...

When we form the future perfect continuousn we use either "will" or sometimes "shall". Using other modal verbs such as "must or should" would be considered incorrect by standard grammar rules so for instance I should have done it before he comes Is simply wrong we should use "will" or "shall". Ye...

Which salon hair did you get this haircut from ?

Occasionally, when I resume from a suspend or hibernate state, I experience a kernel panic. In such cases, I usually force a shutdown by holding down the power button. Recently, I've started using the kernel parameter panic=n, which automatically reboots the system after n seconds following a ker...

Specifically, if we denote by $M \subset R$ a set that is a countable union of intervals (closed, half-closed or open) and have a smooth, strictly monotonic function $f: M \rightarrow R$, is it the case that $G \equiv \{(x,f(x)),\; x \in M \}$ is a manifold with boundary in $R^2$? I have looked f...

I was told the following. Given a wire with a battery connected to a resistor, the current is limited because of the resistance. This resistance is caused by subatomic interactions of the electrons which dissipate heat, losing energy, decreasing the average velocity of the electrons, and so decre...

I'm quite confused about the concept of mutability (or mutation?), especially across different languages. In a language like Python: x = 10 x = 20 I believe this is called shadowing (or rebinding) and not mutability, because the literal 10 will evaluate to an integer object that is immutable. I...

I have been reading about the chain of custody in cybersecurity-related forensics and I wonder how you can be so sure the forensic scientist made their job right and they are not a malicious actor. I have a specific scenario in mind, let's say that you take an image from a compromised server to i...

It's a movie or series on a streaming service. I feel like it was 2020 or maybe earlier or later. I specifically can picture two women, one of whom is a red-headed scientist and the other is dark-haired and older than the redhead. They dwell in a black house in Europe and it's probably the 1920s?...

Objective Given a type signature of a C function pointer represented as a string, output the (fully) curried version of it, also as a string. I/O format It is assumed that: There is at least one parameter. The return type and the parameter types are titlecased alphabetic identifiers. (That is, t...

The MWE example below uses ExplSyntax to create a custom \item command that can be used within the tasks package (to format a solution with each item): \documentclass{article} \usepackage{tasks} \ExplSyntaxOn \NewDocumentCommand{\itemX}{m O{}}{% \tl_put_right:Nn \l_tmpa_tl { \task #1 \\ \texti...

I'm new to this SE, so correct me if this isn't an appropriate question form for this site. I've read Plato's The Republic and a few novels by Dostoyevsky (though I know he isn't technically a philosopher more than a novelist, though he has existential themes in his writing. I want to get into so...

I'm trying to set up a table with multicolumn headers of variable width, some of them pretty long. My code looks more or less like this: \begin{tabular}{|cc|cc|} \hline \multicolumn{2}{|c|}{Very, very, very, very, really long heading 1} & \multicolumn{2}{|c|}{Not that long heading 2} \\ \hline Su...

Suppose you have an expression of the form $$\frac{n!}{k_1! k_2! \cdots k_r!}$$ where $\displaystyle \sum k_i \le n$. The expression must be an integer, because it's the number of permutations of $n$ objects where the $k_i$ are the number of repeated objects. For example, there are $\frac{11!}{4!...

Let $X$ be a smooth projective variety over an algebraically closed field $k$ of characteristic zero. Consider a sequence of blow-ups: $$X_n \xrightarrow{\pi_n} X_{n-1} \xrightarrow{\pi_{n-1}} \cdots \xrightarrow{\pi_2} X_1 \xrightarrow{\pi_1} X_0 = X$$ where each $\pi_i : X_i \to X_{i-1}$ is the...

The pitch appears to be ~2.5mm

One of the definition of basis for a finite dimensional vector spaces is: Let $V$ be a vector space over a field $F$ and $B = \{v_1, \dots, v_n\} \subset V$. Then, $B$ is a basis for $V$ if for all $v \in V$ there exists unique $(\alpha_1, \dots, \alpha_n) \in F^n$ such that $$ v = \sum_{i=1}^{n...

I found a few connotations of how the slang "peachy" is used: Vocabulary.com: #1: very good [non sarcastic]: If you're unhappy, it's usually best to be honest about it, rather than pretending everything's peachy. Merriam-Webster Thesaurus: "of the very best kind" as in lovely: a look back at...

Going through life, I often replace actual perception of the world with my pre-existing knowledge. If I see a car, for example, I might shortcut my understanding of it as "that is a car," and skip any further appreciation of what sets this particular car apart from the broader category of "car-ness.

My understanding has been that for drawing in three or two point perspective, the vanishing points should be on the horizon. But in the image below, we see that the marked vanishing points on the page are not on equal level, meaning one of the vanishing point is above/below the horizon. Here's t...

I'm having trouble writing the math behind the phenomenon of the response of a linear, time-invariant (LTI) system for a sinusoidal input. I know from working with circuits and their ac analysis that given a LTI system, if the input is a sinusoidal signal the output will be a scaled and shifted s...

From the current Wikipedia article on conservative extensions, it states: an extension $T_2$ of a theory $T_1$ is model-theoretically conservative if $T_1\subseteq T_2$ and every model of $T_1$ can be expanded to a model of $T_2$. But presume it really means this: an extension $T_2$ of a theor...

I have a mystery 1-3/4" cast iron pipe (outside diameter) in my basement. It's ugly and rusting, and I want to remove it. I want to know what's in there before I start opening it up, but I'm out of ideas as to what it could be. It has a black, rubbery (and oily in some places) coating along most ...

I am unable to install epstopdf after moving to Ubuntu 24.04 from 23.10. Any solutions? Update: I tried : sudo apt install epstopdf Reading package lists... Done Building dependency tree... Done Reading state information... Done E: Unable to locate package epstopdf Update2 : The issue got resolve...

I’m following a bunch of tutorial series on how to set up Direct3D 11 for 3D rendering, I’m focusing on the swap chain part for now. The main tutorial series I am following is the one by PardCode on YouTube. PardCode opts to use IDXGIFactory::CreateSwapChain() to create the swap chain from an IDX...

Using the toolbar GUI of QGIS (Currenly using v3.28), I can enabled multiple/all the snapping types like this: Now that's exactly what I'm trying to do in this code: (Just setting 2 types for the example) snapping_config = QgsSnappingConfig() snapping_config.setEnabled(True) snapping_config.set...

Recently I noticed that in my Shin Meikai dictionary (新明解国語辞典） app, the readings of 熱感 and 熱型 are ねつかん and ねつけい, respectively. This looks quite unusual to me as I would expect that they should go through 促音化 under the usual rules and become ねっかん and ねっけい, respectively. The goo online dictionary s...

In ComplexityZoo for QAM, The last line goes as: (QAM) Contains QMA and is contained in QIP(2) and $BP\&\#149;PP$ (and therefore PSPACE). I need a help in deciphering "$BP\&\#149;PP$". I suspect, it is (i) $QAM\subseteq BP.PP$. Or, is it (ii) $QAM\subseteq BQP.NP$? I suspect (ii) could also be ...

I have a implementation of SHA3-256 and SHA3-512 in C as API's below sha3_256(output, input, inputlen) sha3_512(output, input, inputlen) I want to now implement SHAKE128 and SHAKE256 using these API's. Is that possible and if so, how ? I don't have access to the internal functions of the above A...

Let N be a non-deterministic TM with Σ as its alphabet, and we define the next language: UNIQUE(N) = {w∈Σ*|w has an unique accepting path on N}. w can have another computational paths on M, but none that result in the accept state. Is the language UNIQUE(N) is Turing-recognizable, for every non-d...

I researched the LEO, MEO and Geo differences and found a website that provides a comparison table In the table, there is a parameter " antenna speed". Can someone explain what kind of antennas they are? On board a satellite or on the ground?

luohe@LAPTOP-4BHAKAPO:/bin$ ls -l python3 lrwxrwxrwx 1 root root 10 Aug 8 01:44 python3 -> python3.12 luohe@LAPTOP-4BHAKAPO:/bin$ python3 --version Python 3.12.3 luohe@LAPTOP-4BHAKAPO:/bin$ python3.12 --version Python 3.12.5 Can anyone explain this to me? thx

I'm currently reading "Introduction to Topology and Modern Analysis by George F. Simmons". In this book on points 10 and 11 respectively open and closed sets, Theorem 10. In any metric space $X$, the empty set $\emptyset$ and the full space $X$ are open sets. Explanation. To show that $\emptyse...

The common anecdotal explanation for why the screen of signal cables should only be grounded at one end is to avoid ground loops. Magnetic fields through ground loops generate current in the loop. Fine, but how would this current affect the signal in the wires within the screen? Will not the curr...

My PC takes a long time to start, then when it's at the login screen it jumps to the desktop instantly. It used to be fast but I don't know what happened that caused this. I even reinstalled my PC and got the latest drivers, but it's still slow at boot. And also, the person I bought this from sai...

I have this equation: $$T=2 P r-\frac{q^2}{4 \pi r^3}+\frac{1}{4 \pi r},$$ and I want to solve it for $r$ perturbatively. This result should be: $$r=\frac{T}{2 P}-\frac{1}{4 \pi T}+\frac{P \left(8 \pi P q^2-1\right)}{8 \left(\pi ^2 T^3\right)}+\cdots$$ I was reading an article where author di...

My lifelong nemesis unexpectedly sent me a box of chocolates, accompanied with this love note. I don't know what's going on! Maybe I have misread our entire relationship? I haven't opened the chocolates yet. Do you think I should try them? How do I love ❤️ thee? Let me count the ways. I love the...

In any newspost about the new 2024 core rules it is mentioned that the new rules are compatible with our collection of D&D adventures and supplements. But, as far as I can find, it does not say anything about compatibility with older core rules. I want to give my players the opportunity to use th...

Lt. Groves and Robert Oppenheimer met to discuss the Manhattan Project and the procurement of uranium ore: Groves: 1,200 tons bought the day I took charge. Robert Oppenheimer: Processing? Groves: Just broke ground at Oak Ridge, Tennessee. Now I'm looking for a project director. Here Lt. Groves ...

The Lagrangian density for the real Klein-Gordon field, which describes a real scalar field $\phi$ with mass $m$ is given by \begin{equation} \mathcal{L} = \frac{1}{2} \partial^\mu \phi \, \partial_\mu \phi - \frac{1}{2} m^2 \phi^2 \end{equation} This is directly introduced by using the action is...

I have Sharepoint 2019. I was trying to open an API to select 1 item by ID but I find it returns all items in the list whatever id= I provide. https://sharepoint.example.com/_api/lists/getbytitle('listname')/items?$select=*&id=12 Is it normal to do this behavior?

I believe that after years of church going, one knows enough. Action is therefore key. Love and serve others as you would the Lord. That is my current stance. To me (protestant), pastors are historians. Once you know the ebbs and flows of the Bible, all the rest is reminding. Which is a good thin...

I have a node MyFigure that contains an image of a grid which has k elements evenly spaced. I would like to create k nodes below MyFigure such as each node is aligned with an element of the image. Something like this: Where the top black block is MyFigure and the four block below are the text no...

I want to make a newcommand which uses a foreach loop in tikz to draw lines, whose points are parameterized in the newcommand. I am running into two problems: If no unit is specified when calling my command, it says that I am using an illegal unit of measurement (pt). If I specify the unit as ce...

When trying to do polygons from polylines I always fail and end up using my old program ArcView3.2 and Xtools. It is probably something I do wrong but I cant see what it is. The below is the result of this zipfile Is there someone that has a step by step instruction, that include what to do to c...

I have a project with an .editorconfig file which sets max_line_length = 100. I can't stand this setting, and would rather not have Nvim changing settings on its own, so I went to disable editorconfig support by adding this line to my init.lua file: vim.g.editorconfig = false However, after doin...

Question: Suppose you play a game where you continually roll a die until you obtain either a 1 or a 2. If you receive a 1, then you cash out the sum of all of your previous rolls (excluding the 1). If you receive a 2, then you receive nothing. You do not have the decision to cash out mid-game. W...

With no one vulnerable at atchpoints, left hand opponent opened with one heart. Partner passed, right hand opponent raised to two hearts (both of them had minimums for their bids). I passed, holding ♠87 ♥AKJ2 ♦ AKQ9 ♣QJ3, because I was "stuck" for a bid. I considered doubling for takeout, but fea...

Not exactly a question about gardening, but this forum seems to be the best bet. We found the following house plant (fairly common one, as far as I can judge) on the roof top of our apartment building. It is in a sorry condition after having been exposed to direct sunlight for many days without w...

How does my wallet know that someone sent me some money as soon as the block containing the transaction gets mined? Does my wallet check for new blocks on the blockchain continuously 24x7x365? And every time it sees a new block does it scan each transaction in that block & check if any one of the...

How many kms do alu rims last when ridden in city and/or road conditions? I understand that durability is critically dependent on several factors like riding conditions, spoke count, quality of rim/wheel, rider weight etc. Please no general answers explaining this. I only want real experiences of...

Historically, the Japanese were almost vegetarian. The Japanese were almost vegetarian for a long time. Is it possible to use (1) to mean (2)? I do not know whether "historically" can mean "for a long time" in some past tense sentences. I have consulted the American Heritage Dictionary, Col...

I've created a from via Form Builder which allows staff to create contacts more easily. It works fine but I am missing one functionality: Adding the contact to a group. Is anyone aware if this is supported in Form Builder? And if so, how?

Background In a near future sci-fi setting, humanity has spread across the solar system and many humans live in space habitats. For reasons of economics and self-sufficiency, those habitats have their own hydroponic farms, to provide food and oxygen to the inhabitants. However, pressurized space ...

$\newcommand{\GCD}{\operatorname{GCD}}$ For $n=0,1,2,\ldots,$ let $F_n=0,1,1,2,3,5,\ldots$ and $L_n=2,1,3,4,7,11,\ldots$ be the Fibonacci and Lucas sequences. I expect the following is well known, but can someone supply a proof or reference? Claim: For $n \ge 1$, we have $\GCD(F_{4n+2},F_{4n+3}-1...

I have customs versions of packages tabularray.sty and piton.sty in my local texmf : $ kpsewhich -a tabularray.sty /home/yann/texmf/tex/latex/chato/tabularray.sty /opt/yann/texlive/texmf-dist/tex/latex/tabularray/tabularray.sty $ kpsewhich -a piton.sty /home/yann/texmf/tex/latex/chato/piton.sty ...

How can I change the line color (and for that matter style, such as line width, dashed, double lines) of the vertical lines between block start-end keywords in the algorithm2e package? Thanks in advance! MWE: \documentclass{article} \usepackage{xcolor} \usepackage[linesnumbered]{algorithm2e} \b...

It's become a common refrain to hear of Russia's strikes against electric power infrastructure in Ukraine. Each iteration always seems to be the biggest yet, and the media is always keen to report it (as a self-evident horror of war, or massive spectacle). It's easy to imagine that the lights goi...

In general, stars can have satellites orbiting around them. Then, can light become a satellite of a black hole? Once light enters the Schwarz shield radius, it cannot escape the black hole. However, let's assume that light passes through a very close part of the Schwarz shield radius of the black...

Now I admit this is kind of flimsy but I wanted to double check just to be sure. Kapenia Dancer Arcana: A kapenia dancer gains access to the following magus arcana. He cannot select any arcana more than once. Elasticity (Su): As a free action, the kapenia dancer can spend 1 point from his arcane...

Is there a name for the fallacy where, if someone is not able to explain how he or she does something, it is taken as a proof that he/she can't actually do it? For example, I once claimed in an argument that a photograph was staged (as opposed to authentic). My opponent rhetorically asked, how co...

I thought I was remembering Bearing An Hourglass by Piers Anthony, but I just reread it and that’s not in there. Now I wonder what book I am remembering. What I recall is early in the book the character is being oriented to their new situation and a woman walks right up and kisses him - and he is...

Sigma has two versions of its 30mm f1.4 lens: One in the Art line with mounts for various DSLRs and one in the Contemporary line with mounts for various mirrorless cameras. I'm wondering why the distinction. Are there any notable quality differences between the two models? Presumably the Art ve...

We planted a silver maple last year and used soft loop-style stakes to help it grow straight. However, it developed a large (over 60%) wound on its 1 year old trunk (which is only @ 2" in diameter). The top has stopped growing and is not getting nutrients but there are 3 strong suckers at the bot...

I am making a cosman workbench I now have to attach the glued stretcher (57mm thick plywood) with bolts to the legs. I bought a 54mm forstner bit to bore a flat bottom hole (need 38mm depth) in the stretcher to hold the bolt end and nut. shown at 2:34 in video I am just not able to drive the fors...

What exactly is LED starter? The producers ship it with only a vague explanation that it is needed to replace the original fluorescent tube starter when replacing the fluorescent tube with its LED doppelganger, but they never explain what it is inside and how exactly it works.

I was curious, is there is any video of a missile shooting down an aircraft? I have looked around, and I can’t seem to find anything substantial. (Anything I did find was fake, such as this) Air-to-air is what I’m looking for, but surface-to-air also counts.

I'm trying to calculate and plot correlation coefficients between two Image Collections, which are monthly NDVI and MODIS hotspot counts (where hotspot counts represents the number of times a pixel has been detected as a hotspot, per month.) Each is a stack of aggregated monthly images with the s...

As part of a collaboration, I've been asked to fit a model with a continuous response $Y$ and an ordinal predictor $X$ (levels 1 to 5). The dataset owner is after an answer that is inherently binary: how does $Y$ differ between $X$ = 1/2/3 vs. $X$ = 4/5? Their reasoning for the binning is that: ...

I would like to have a quick review of my circuit diagram. I want to ensure my flyback diode is correct and I have a sufficient diode for my use case. I am using a LiPo battery (4.2 V max / 3.7 V nominal) connecting to a header which will have an external coil placed on it (1-2 ohms). The power a...

Trying to replace a faulty 2way light switch one of the switches no longer works in kitchen with a new style. Terminology is completely different and would like a steer how to rewire as Screwfix, Homebase haven't a clue. Included the current wiring layout and the new one. Help would be gratefully...

In sulfur-nitride chemistry, [S4N4]2+ is aromatic due to its planar, 10-electron structure which accords with Huckel's rule. The overall conjugation for the molecule is found in "the guide to chalcogen-nitrogen chemistry" book. However, is it possible to write its resonance structure?

I am trying to set a blockvector A in another vector with brackets around A. In the nicematrix documentation, there are ways described to set brackets around a part of a bigger matrix and to define subblocks, but it doesn't seem to work well together, the brackets for the inner and outer matrix a...

I ran across the following sentence while reading Japanese teaching materials. The context is that a teacher is explaining to students how to draw a parallelogram. The book has the following recommendation for an exercise in which students are tasked with drawing a parallelogram ABCD from a side ...

Given the matrix mat = {{3, 9, 27, 81, 243}, {5, 21, 81, 297, 1053}, {9, 49, 225, 945, 3753}, {17, 113, 593, 2769, 12033}, {33, 257, 1505, 7681, 36033}, {65, 577, 3713, 20481, 102785}}; I would like to generate a MatrixPlot which will be divided in two regions according to the magnitude of each c...

I am learning to interpret oscilloscope readings and I have met an unusual waveform. Have a look at the following PCB image. It is a part of a guitar effect pedal. When I put my probe on the left side of the crystal i get the following waveform: It oscillates at a frequency of 12.2883Mhz as exp...

I am trying to do 2-sided copy using the Document Scanner app via the top feeder of a Canon E4570 scanner-printer. The picture below shows the app setting before clicking Scan. The app is able to scan the top page of the paper but not the bottom page of the paper. How do I activate duplex scannin...

I want to back-up my MySQL server on another server in another location (for data safety). The problem is the other server is half as powerful as the main one. I don't need the server to be 100% replicated. Even one hour difference would be enough for my use case but I want to be sure I do not lo...

I was given to study the structure of the molecules $\ce{NO2}$, using VSEPR theory, even if the presence of a single electron is better explained by OM theory. Using the standard form $\ce{AX_nE_m}$, where $\ce{A}$ stands for the central atom, $\ce{X}$ the terminal ones and $\ce{E}$ stands for fr...

How would I suspend all use of crontab until the system is rebooted? The system runs ubuntu 24.04. I say all use because several IDs on the system have crontabs.

Thin Film Isotope Nuclear Rockets (TFINER) sound intriguing: cold nuclear rockets (with no moving parts) capable of interstellar velocity. According to https://www.nasa.gov/general/thin-film-isotope-nuclear-engine-rocket , the concept has been awarded Phase 1 funding in NASA’s NIAC. So yes, “it i...

The command :echo strftime("%F") works, but the result stays on the command line. I tried put command to no avail: :put =strftime("%F") How do I get the answer in the buffer?