I used to run Steam on an external drive mapped as the I: drive, and then I got a new computer and transferred my games to a secondary internal drive mapped as the D: drive. The external drive no longer works and has been disconnected. I'm trying to play Call of Duty: Black Ops (1) that was succe...

What protections does TLS use in the above scenario? In the picture, the client asks the attacker for the address of Google.com, but the attacker gives them a different ip address which redirects to a domain that looks like Google.com.

I'm writing about the history of noise and am having trouble tracking down references from when the term "noise" started being associated with statistical noise such as Gaussian Noise and not just things like people talking in the background and RF noise that prevents the interception of radio si...

The relationship between an A and a B is different in say, just intonation and equal temprement. I understand that the absolute frequencies aren't important but instead the relative difference between them. If the notes don't have some idealized or 'correct' set of ratios then what do the notes a...

I've bought a Davtron model 811B aircraft clock (14 Volts), but my power source when measured with an accurate multimeter, reads exactly 14,29 Volts. Is that a problem? I mean is that tension (14,29 V) "too strong" for a 14V avionic? Thanks a lot.

Let $M$ be an toplogical abelian group. I heard we can define $\hat{M}$ by completion of $M$ with respect to the topology defined by the subgroups of finite index. For example, if $M=\Bbb{Z}$, then subgroups of finite index is exactly $n\Bbb{Z}$ and $\hat{M}=\varprojlim \Bbb{Z}/n\Bbb{Z}=\hat{\Bbb...

In the preface to Landau and Lifshitz's Statistical Physics, they comment the following In the discussion of the foundations of classical statistical physics, we consider from the start the statistical distribution for small parts (subsystems) of systems, not for entire closed systems. This is i...

I was thinking if I could solve the sum $\sum_{n=1}^\infty \frac{1}{n^2+1}$, and I reached using the laplace transform of the sine at the integral $\int_0^\infty \frac{sin(t)}{e^t-1} dt$. I entered the sum into Wolfram Alpha, and it gave me $\frac{1}{2}(\pi \coth(\pi) - 1)$. How it reached this v...

Why are some players seemingly 'naturally' better at chess than the majority? Of course intelligence plays a part, but there are plenty of 'clever' people that are not very good at chess and some 'not clever' people who are chess prodigies. What exactly about these people/their upbringing makes t...

I'm not entirely sure how to phrase this question and the title might be misleading so i'll show with images. I'm making a toon shader that uses a solidify modifier to apply an outline to the meshes it goes on to by flipping the normals of a material that has backface culling. However, this is pr...

The following snippet generates compilation errors on adding -pedantic and -Werror on compilers that are a bit old. #include <cstdint> #include <iostream> int add(int a, int b){ return a + b; }; // <-- stray semicolon int main (){ return 0; } However this does not happen newer compile...

With the code \documentclass[11pt]{article} % --- PACKAGES --- \usepackage[margin=1in]{geometry} \usepackage[standard]{ntheorem} \usepackage{amsmath, amssymb, mathtools} \usepackage{enumitem, breqn} % --- COMMANDS --- \newcommand{\problems}{\begin{enumerate}[label=\arabic*.]} \newcommand{\clo...

Having managed to send two sous-vide circulators to the great electronics graveyard in the sky, I am determined not to repeat the same mistake with my third and most recent acquisition (a Buffalo DM868). The previous circulator (a German unit) had only been used 25 times over 12 months, but despi...

I enter country X with my passport from country Y I leave country X with my 2nd passport from country Y Both passports are same type but they have different passport numbers. Is that ok? If I have connected flights, can I switch passports on the way? If I'm in a union, can I enter using 1st pa...

I am trying to find the spec that defines how the SRID metadata is included as part of EWKB in PostGIS. Which bytes/hex values represent the SRID metadata in EWKB? Where can I find a spec on EWKB apart from this doc (which doesn't say about the byte level details)? How is EWKB different from OGC ...

It is cited in multiple places that the fact that a filter is causal (i.e. the impulse response is zero for t < 0) implies that the system function is analytical. I couldn't find any proof of this, why is it the case?

Wondering if you folks could work your magic to help me identify a 90s first-person shooter based on this list of my not-so great memories of it: Timeframe, region, and technology: I played this game in the US in the 1990s. I don't remember purchasing it, so maybe it was shareware or part of a...

The website I used to read that manga on is sadly shut down, but there was this specific nobility manga where the female main character (FMC) was hated by her "family" that were like her cousins or something, and essentially forced her via potions / magic to look like a boy. The FMC then gets rea...

In the first bar of Scriabin's third prelude op. 11 he indicates a finger "0" in the left hand as seen in the screenshot (preview from Henle's website) below. What is this supposed to mean? I can imagine that it is very difficult to play this note (C), since the key has just been pressed by the r...

I have an older Whirlpool LER584EQ4 electric dryer. My clothes are now coming out a bit damp when using the sensor-based drying cycle, even when set to the maximum "Heavy" dryness level. I have taken off the back and thoroughly cleaned the lint filter and duct, vent hose and all the various cha...

So I was checking out sequential logic and I found two different circuits for flip flops (or latches, or both). Let's take D flip flop for my quesiton. There's one circuit here, showing a D flip flop: I found an issue here. Flip flops are meant to be edge triggered by clock. But here, suppose th...

So I came across this video (https://www.youtube.com/watch?v=z0hxb5UVaNE), which claims to prove the existence of God using math. I then searched and found stuff like this: mathematician Kurt Gödel's work on proving that God exists with math. Can math actually prove the existence of God 100% or i...

While watching the 2023 Chinese tv adaptation (IMDB) of Cixin Liu's The Three-Body Problem with English subtitles, I noticed a peculiarity: Instead of using actual place names, the show appears to use placeholders - generic-sounding city names for places in China, and obvious placeholders for any...

A delay-differential system for variables {y[t],z[t]} is defined by time-lag w {y'[t] == (r (1 - y[t] - z[t]) - 1) y[t], z'[t] == (y[t] - y[t - w])}; The important constraint is 0<z[t]<1. When z crosses 0, the lagged term y[t-w] should be switched off. I tried WhenEvent with discrete 'switch' ...

I'm looking to achieve a similar effect to this -- where there are circles at the cell boundaries of a voronoi texture, though ideally the circles would not be evenly spaced and I would be able to adjust the size and number of circles. I found this answer to a previous and somewhat similar quest...

I'm doing some anki revision when this popped up. I understand the characters in isolation, but can't understand the meaning of the sentence. Google translates this to "from now on I'll have less" which I guess the characters are sort of there for that. Just feels like I'm missing something. Any ...

In the question link, one of the comments mentioned that $4 \cdot e \approx 10$, and indeed, $4^{9} < 9!$ according to Stirling's approximation. In other words, $9$ is very close to $\left\lfloor 4 \cdot e \right\rfloor$. However, Stirling's approximation function is $ n! \sim \sqrt{2\pi n}\cdot ...

I'm reviewing KDE, Max LLE and Expectation Maximization algorithm for density estimation and struggling to differentiate what each algorithm's merits are compared to it's predecessor. I'm aware that if data has two or more peaks, i.e., it came from two or more unknown distributions, parametric de...

During the climax of Men in Black, the two agents shot the ship the Bug was using to escape and brought him back to the ground. As soon as the Bug was out, he took away their weapons and showed them his true form. Then he just pushed the agents away and started walking the other way. He swallowed...

Looking for a short story where two explorers leave a planet but their air has been contaminated by the planet's atmosphere. When in space their minds give form to their childhood fears. They realise that their best defense is hiding under blankets. It was a humourous tale. Read in the 70s, part ...

as the title says, I've heard of the terms 'Pillar' and 'Marking' in the context of fitting volatility smiles and derivatives pricing in general and I'm having difficulties finding definitions on Google. I would be very grateful if someone could clear this up. Thanks!

I only remember one scene from this movie. A guy finds a black spacecraft in a icy cavern. I'm pretty sure there was another bad guy seeking the ship in the mountain. This would have been a movie (or maybe a TV show), somewhere from late 80s to mid 90s. not a comedy. For some reason my brain link...

More airlines are selling the "large carry-on" extra nowadays in Europe; something that used to be free a few years ago. Examples: Easyjet, Vueling, Ryanair... If the flight is not full, and there is still space available in the overhead bin, can I use it even if my ticket only includes the small...

Consider the following sequence of deepening lists: s = {s1, s2}; t = {{t1, t2}, {t3, t4, t5}}; c = {{{c1, c2, c3}, {c4}}, {{c5}, {c6, c7}, {c8, c9}}}; ... What is the easiest way to write a function GeneralizedAssociationThread to achieve generally the following for an arbitrary sequence of dee...

I've been working with a friend to design a sci-fi setting for a TTRPG campaign and one of the issues I've run into is the scale of food production and transportation within the setting. In the setting in order to supply a population of around 25 billion people, a large majority of bulk food good...

I quote Sabine Hossenfelder: Gravitation is a spin-2 interaction. It is straightforward to see that this means that like charges attract and unlike charges repel. The charge of gravity is the mass. This does not mean that negative gravitational mass repels everything. Negative gravitational mass...

Given the relationship: $$\pi = \left(\frac{15ab^2c^3}{2d^4}\right)^{\frac{1}{5}}$$ where a, b and c are non-zero positive constants, can it be assumed at least one of a, b or c must be a transcendental number, since $\pi$ is a transcendental number? After re-arranging we get: $$\frac{15}{2} = \f...

In general, I understand that nonces are used to prevent replay attacks, but in the case of a TLS 1.3 handshake, the Client/Server Hello message contains their public keys. Considering that keys are randomized every time (as in the case of Ephemeral Diffie-Hellman), don't they act as a "nonce" fo...

Note I'm exclusively considering binary stars, not 3+ star systems. Binary stars come in all extremes. Wikipedia says that their orbital periods can be a few hours, a few days, or hundreds of thousands of years. Is there any data, however, on the average semi-major axis of their orbits? I'm tryin...

From the general linear model, we know the following : $E(\pmb{\hat{\beta}}) = E((\mathbf{X}^T \mathbf{X})^{-1}\mathbf{X}^T\mathbf{Y}) $ and $Var(\pmb{\hat{\beta}}) = \sigma^2(\mathbf{X}^T \mathbf{X})^{-1}$. Does that hold true when interaction effects are included, that is $\mathbf{X}$ contains...

I bought several larger 3.5" HDDs in SATA format and two of them have a different port on them and will not mate with the external enclosure. One of them is a 3TB and the other is a 6 TB. The 6TB is a Seagate and is an "Enterprise Capacity" with no other instructions on it. I can't imagine the ca...

I am about to apply for a PhD position at a European university as an EU citizen. I suffer from a physical disability. As such, I have the right to appeal to the Executive Order on Compensation for Disabled People, that is, preferential access due to my disability. I am having trouble deciding wh...

In this story, a young woman has a conversation (via typing) with a primitive psychoanalysis program (much like Eliza) which feeds her sentences back to her ("It's all been just so much lately" "How has it been so much lately," etc.). I think the woman believes that someone is in another room ty...

(From The Wrecker by Robert Louis Stevenson and Lloyd Osbourne, Chapter XI, published 1892) This characteristic scene, which has delayed me overlong, was but a moment in that day of exercise and agitation. To fit out a schooner for sea, and improvise a marriage between dawn and dusk, involves he...

It's a phrase in Star Wars by Obi-Wan Kenobi: "He wanted you to have it when you were old enough." Why did he use the word "were" instead of "will be"? (Regardless of the truthfulness of the phrase, just to understand the logic of the language.) As I understand it, when 'he' (Luke's father) wante...

I made a pumpkin sign that is secured to a dowel. I want to put it in a pot on my porch and I am not sure on the best option to keep it straight and secure? I thought of using concrete or stones, but am leaning towards making a clay bottom attaching that to wood then adding some sand and rock to ...

I read a manhwa where the the female lead dies because her family poisons her. She goes back in time and in her new life she willingly gets “poisoned” and wakes up at her funeral to point out who did it I believe someone gives her an antidote to make sure she wakes up again after being poisoned a...

What is the typical and generally accepted minimum clearance between the ground and pedal? Does this vary between different bike styles (road, gravel, mountain)? I've read that designs with low clearance are generally more stable, due to lower center of gravity, but I could not find a number for...

Just had a screened in porch built with a metal roof. But now bugs are getting in through the gaps the corrugated roof left on the side. How do I plug them? Seems too large of a gap for caulking and foam sealant would not look good. Any suggestions?

Will this vanity fit into a 42 1/8 in space between two walls? According to the specification, the base is 42 in and the counter top is 42.5 in and made of cultured marble. Although the top is larger than my available space, I'm wondering if the walls, which are made of dry wall, will compress en...

from what I understand it’s brought down that one cannot cut higher than the neck during shechita, I wanted to know what the kosher status is of an animal that was cut above a valid region but the slaughter was finished on a valid region? Would it be kosher? And what if it starts in an invalid ar...

I have an earth-like world orbiting an M7 red dwarf on the outer edge of the habitable zone(0.0443AU). Since red dwarfs emit more infrared light than visible light, solar panels would probably not be as efficient. Assuming that a civilisation around it builds a space station the size of the ISS, ...

Parents of young children say kids are being left behind as updated Covid-19 vaccines roll out. https://edition.cnn.com/2023/10/03/health/pediatric-covid-vaccines-rollout/index.html Why use the passive progressive form, as opposed to simply "kids are left behind"? Is the idea that the kids ar...

Let's say I have 4 groups of football fans, and I want to see who screams loudest, and I want to run an ANOVA. My dependent variable is loudness, and my independent variable is Fan_Type, with 4 levels. Do my residuals overall need to be normally distributed, or for each group? It seems like what ...

The Atlas III and V first stages were powered by NPO Energomash RD-180 engines, unlike the previous Atlas II which was powered by Rocketdyne RS-56 engines. Why did Lockheed Martin switch to Russian engines? Were there technical advantages which outweighed the geopolitical challenges of relying...

I want to exclude package-lock.json and lazy-lock.json on telescope but I cant make it work. Both files are not included in .gitignore but I don't want to search on them. This my config for telescope telescope.setup({ defaults = { prompt_prefix = "❯ ", selection_caret = "❯ ", ...

What is considered better practice? Case 1: if n == 0: doThis() elif n < 0: doThat() elif n > 0: doSomethingElse() Case 2: if n == 0: doThis() elif n < 0: doThat() else: doSomethingElse() The first case is more explicit and (arguably) clearer. The second case doesn't han...

I'm reviewing vocabulary, and reached 前景, and one of its meanings is the foreground (of, say, a movie set or a photograph). ChatGPT uses 背景 as its antonym, but I'm wondering if 后景 is usable, since the antonym of 前 (in 前景) is 后 (in 后景). I didn't find 后景 in CC-CEDICT, so I'm guessing it's rare or ...

I'm building a GraphQL query to return back an item and its fields. One field is NameValueList - I can just return it as a string and cast it to an interface the layout service returns it like this: "myNameValueList": { "value": "key1=1&key2=0" } My interface looks like this: interface MyFiel...

No need to give context to this question of course, but how would our Sages say we can help Israel during a war like this? I’m not just looking for answers like “pray”, but rather maybe more specific stuff that perhaps some commentaries have written about during hard times for the Jews in the pas...

I am working on the model which can visualise how the night sky change over time (from observer's point of view). I was thinking how axial precession affect positions of stars and planets on the night sky, but after hour of straight thinking I can't put it together. I use as reference point of vi...

In Gattaca (1997), in the last scene, Vincent came to the test room and met Dr. Lamar for his final test before boarding the spaceship. I understand that Dr. Lamar had known Vincent's true identity from the beginning, but he chose to ignore it because he felt a connection between his son and Vinc...

Suppose that the average number of cars passing by a building, $X$, is 3 cars per minute. Assuming that $X$ follows the Poisson distribution with mean $\lambda=3$, the probability that 1 car passes per minute is $$P(X=1)=e^{-3}\frac{3^1}{1!}\approx0.15.$$ On the other hand, let $Y$ be the number ...

According to at least one philosophy of mathematics, the axioms determine the meaning of the primitive symbols that are used in the axioms. The phrase "used in" is somewhat imprecise, so please see the note at the bottom. Could it be worthwhile to conduct actual experiments to see whether there ...

I am reviewing a paper for a major journal with very high impact factor. Some of the authors are very well known in the field and have several other papers published in this particular journal, such that their objectives and results are likely valid ("likely" is the best you can get in this field...

before anything i must say this code work as well for English language but in Persian never work i use this code in model/celebrities.php this code show my frontend model class AvisamoviedbModelCelebrities extends ListModel { protected function populateState($ordering = null, $direction = nu...

I have a 2010 corsa, has been fine over 250,000miles and just passed MOT last month. Driving home last night, died on me. Pulled out of junction got into 3rd when the revs went high for 5 secs before going back to normal. Then got into 5th and revved high and smoke started coming from back. Turne...

How bright is a "full Earth" from geosynchronous altitude (22,200 mi) and would it be dangerous to look at a full Earth for too long from that distance without wearing a dimmed visor?

Currently at the moment, I'm doing my research on the glyph origin of 規/规 (guī; rules, regulations, customs, law) and I can't really come to a determination of what this character's origin is. I've already checked the Old Chinese pronunciations for this character and it's components, but it seems...

Plant is over 6' tall, 6' wide. Tendrils with seeds and has slight order of burnt coffee. Initially ID as peanut but does not look like a peanut plant.

Let $u$ and $v$ be vectors where $u\neq v$ in the equation: $$2u\cdot(u-v)=u\cdot(u-v)$$ I am trying to find a reason why you cant just cancel out the $(u-v)$ from both sides. My reasoning is that dividing either side by $(u-v)$ would be dividing a scalar by a vector. I'm not sure if this is the ...

I need an advise how to safely pause a Garmin (I have Edge Explorer 2 but the problem is more general) during a longer coffee or pub (alcohol free) stop. Safely means that the screen should be locked so that no activity deletion could happen. I have had two running activities discarded already in...

With this recent attack by Hamas I looked up the incident on Wikipedia and it says: "It is the first direct conflict within Israel's boundaries since the 1948 Arab–Israeli War." Israel has fought a number of wars and conflicts, does this mean that in all previous conflicts, including the Six-Da...

Challenge: Given a positive number \$n\$, convert it to binary, and output a sequence where all 1s form a top-left to bottom-right diagonal line, including a leading column of 1s. To give two examples: \$n=1\$ will result in [1,3,5,9,17,33,65,129,...], with binary values: 1 11 101 1001 10001 1000...

I am interested in the following sequence which I came upon while generalizing an Integral Family. $$A[n]$$ [0,1,5,6,13,14,18,19,29,30,34,35,42,43,47,48,61,62,66,67,74,75,79,80,90,91,95,96,103,104,108,109,125,126,130,131,138,139,143,144,154,155,159,160,167,168,172,173,186,187,191,192,199,200,204,...

New to Blender, and my first question on Stack Exchange. I'm trying to create a brushed metal effect on a ring. However, my brushed effect is appearing in a circular shape, rather than in straight lines around the ring as I would like. Images show the effect I'm getting, and the shader setup I'm ...

When I try to log in to Outlook I get the current message: 500 Something went wrong. Repeating redirects detected. Then: We couldn't sign you in. Please try again. Tried with different browsers, incognito and even on a iPad that has never logged in with the business email. Same result every...

Markets with information asymmetry frequently result in a loss of efficiency relative to perfect information, see e.g.; moral hazard. Yet I have seen the claim Information asymmetry isn't a market failure unless its fraud. Is information asymmetry considered a market failure in mainstream econo...

I'm almost completely ignorant in elisp, but I'd like to have a function that does the following: Takes a string from (a) a region, if one is selected, or (b) user prompt, if a region is not selected. Internally replaces a couple of regexp in the string with other strings. (Specifically, first "...

In Se7en, John Doe turns himself in, asks for a lawyer and then proposes a deal to lead Det. Mills and Det. Somerset to the last 2 bodies. However, if they refuse, he announces he will plead insanity in his trial. Det. Somerset replies: "If he were to claim insanity, this conversation is admissible"

I want to make a nichrome wire reshot on command. I planned to use an Arduino along with it. The basic idea was to use an optocoupler to isolate the nichrome wire section from the microcontroller side. The Circuit I have tried is given below: It seems like the circuit is not working. When I rep...

i've got the following error messages: ! Missing } inserted. <inserted text> } l.47 \end{axis} I am using Tex in the newest version. Thanks in advance! \documentclass[a4paper,12pt]{article} \usepackage[ngerman]{babel} \usepackage[T1]{fontenc} \usepackage{amsmath} \usepackage{tikz} \usetikzlibra...

Is there for every $k$ a $k$-connected graph whose longest paths do not have a vertex in common? This is known to be true for $k\le 3$, see Ayesha Shabbir, Carol T. Zamfirescu., Tudor I. Zamfirescu: Intersecting longest paths and longest cycles: A survey. Surprisingly, nothing is mentioned about ...

Below is the bottom layer of a 4 layer PCB.The stack up is SIG-GND-Power-Signal. You can see that there is a floating ground whose some portion is not connected to GND plane. I have shown that in red color. The portion connected to GND plane is shown in violet color. May I know keeping ground flo...

Do journals publish papers that cite preprints? I have an article where a good chunk of work is based on a preprint and I have cited it, accordingly. But that preprint was released on arXiv in 2021 and it hasn't been published yet. So, in that case, would it be a bad idea to send my article to a ...

I have a circuit that consists of a relay, two NMOS transistors and some pin headers used for connecting a load. The differential input voltage is connected to J20. The relay acts as a switch controlled by Q6 driven by an onboard Arduino Micro. When the relay is closed and a load is connected b...

Is it possible to win (black or white) in this position? [fen "2k5/5R2/8/4K3/r7/8/8/8 w - - 0 1"]

I am trying to change the "hostname --transient" to some computers with a for loop using a variable. I want it to collect the "hostname -f" from the server itself and, using the variable, change it automatically. When I run it, it tells me "Invalid number of arguments." Command: for i in `cat /tm...

1. Problem statement I want to display "categories" (f.e. the yearly winners of a football league) in a circular manner - a rounded version of OrdinalScale in a certain sense. 2. Toy data data = { {"Chelsea", {1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0}}, {"Arsenal", {0, 0.8, 0.8, 0.8, 0.8, 0, 0, ...

$\DeclareMathOperator{\Spf}{Spf}\DeclareMathOperator{\Spa}{Spa}$In the Definition 8.5 of the paper "integral $p$ adic Hodge theory" by Bhatt-Morrow-Scholze, they define the adic generic fiber of a small affinoid smooth formal scheme $\Spf(R)$ as $\Spa(R[\frac{1}{p}],R)$, here $R$ is a smooth $\ma...

Prove that if you choose 21 numbers out of numbers ${1, 2, ..., 100}$, then there exist four numbers $x, y, z, w$ so that $x + y = w + z$

What is slang for a book that has pages made of paper; the opposite of an ebook? I used to know. It's something like "tree book", which I know is wrong, but I can't come up with anything better. A printed book must be discarded because it's neither slang nor humorous. Google search did not help m...

I think I'll cross the border from Thailand to Laos again for the first time in years in about two weeks. I really like crossing borders at small, quiet, out-of-the-way crossings. Even if they're not easy to get to. I crossed from Malaysia a couple of weeks ago on a tiny river ferry with only one...

I have been having rash on my skin, and it looks like I am being bitten by something. Today I noticed this. Is it a tick or a spider?

This is in reference to Nielson & Chang (page 109). Schmidt decomposition: suppose $|\psi\rangle$ is a pure state of a composite syste, AB. Then there exists orthonormal state $|i_{A}\rangle$ for system $A$, and orthonormal state $|i_{B} \rangle$ of system $B$ such that $|\psi\rangle = \sum_{i}^...

I have a self-inflicted problem with the input files that I am generating using RDKit in order to automate my ORCA jobs. I like to keep track of data such as: The name of a mol The SMILES of a mol The path of an .inp file The ID ("%.08d" format string number) of a mol and other stuff from the g...

Some months ago, I took over the project management (together with a collegue from engineering, my responsibility is the scope of operations) for a project from a colleague who had left. The project is intended to improve the consistency of the order processing process with regard to master data ...

I wondered what this part is. The package is SOT-23 3PIN and the marking is 2RVD and I think it is a MOSFET.

I want to know what MHz and GHz frequency filter circuits look like. Is it like an LC filter? For example the VLF-80+ from minicircuits. Why are they so expensive. They are around 30$ per part. I know that they are high order filters but still 30$ sounds too expensive for a simple LC filter. I as...

I just got an unwanted surprise this morning when downloading some photos from my icloud: the photos are in HEIC format. This appears to be some format that Apple is pushing on me, but at this point it's an obstacle. Moreover, I never asked for my photo downloads to land as HEIC format. I don't w...

I will be starting a position as an assistant professor shortly and I have recently received applications from PhD students who in my honest assessment are likely a good bit smarter and more talented than me. There is a decent chance I will be in a position to advise such students which I find in...

If I create a simple shiny metal material, by using Principle BSDF, crank up Metallic to 1.0, and drop the Roughness down, then apply it to a sphere and a cube. I get this: The sphere looks good, but the cube does not. I think I understand what's happening: the sphere has a convex surface, so it...

In signal processing, we define an analytic signal as a complex-valued signal which has no frequency components for $\omega<0$. It can be shown that the real part and the imaginary part of an analytic signal $x(t)=x_R(t)+jx_I(t)$ are related by the Hilbert transform: \begin{align} x_I(t) & = \mat...

Is the reactance in a conductor approximately equal to the resistance in a conductor when the depth is very large? If so, why? I'm struggling to understand the concepts behind this. I believe it has something to do with skin depth. Thank you!

Is there a way to prevent the material flicking, as you can see in the following video? I understand that it's most likely from objects being too close to one another, but they are modeled so one object covers another, by 1 or 2 inches. That is, they are not coplanar. Is there a setting one can ...

I don't know if this is the right place (at most they will close the post). Anyway, I am trying to implement the characteristic function of the Heston Wishart Stochastic Volatility model illustrated in the work of Da Fonseca, Grasselli and Tebaldi [2008] in order to use Fourier transform methods ...

chi(t) is implicit function. The implicit function can be plotted by ContourPlot. Is it possible to obtain chi(t) explicitly using function interpolation? chi=Interpolation[...], t∈(0, 300) ClearAll["Global`*"] eq[chi_, t_] := 0.7*(t - 315)*(chi)^(1/1.6) + 0.008*(chi)^(1/1.6 + 1/0.4)*100...

Why can't the RHS of the Einstein field equations take a form like $T_{\mu \nu}$ plus some coefficient multiplied with $g_{\mu \nu} T$? It should also be covariantly conserved, I suppose? For example, if it is $T_{\mu \nu}+g_{\mu \nu}T/4$, the coefficient $\kappa$ that links the LHS and RHS of th...

I want to ask how are orchestral toms notated. I Know how toms in a drumset are placed in the staff and there are only few of them but what if I want to use more toms with different pitches? How to notate them? Can I just arbitrarily place them on the staff based on their pitch or is there a stan...

I am trying to make a speedometer cum odometer. I'm using a PIC based MCU. The speed I'm getting is as an analog input. (at 0 V, I get 0 km/h and at 18 V, I get 25 km/h). I can easily measure the speed using the ADC conversion. The issue I'm facing is how do I measure the distance here. Does anyo...

In the context of the Student's t-distribution cumulative distribution function, R Version 4.3.1's ?dt documentation highlights the following result: However, upon attempting to verify the accuracy of this formula, an inconsistency arises, as illustrated in the following code snippet: v <- 5 t <...

Suppose I have a function $f(z)$ analytic in an annulus $A_r := \{z\in\mathbb{C}\mid 1/r<|z|<r\}$ and I know that $|f(z)|<\epsilon$ on $A_r$. Furthermore, $f(z) = \sum_{k\in\mathbb{Z}}f_k z^k$, and $f(z) = f^+(z)+f^-(z)$, which are defined as $f^+(z) = \frac{1}{2\pi i}\int_{|\zeta| = r} \frac{f(\...

I have been working on a mathematics paper for some time now, and I had the idea that instead of publishing just a regular paper, I could create something that is "interactive" to encourage a reader to engage with the concepts, and facilitate understanding. My criteria for "interaction" are the f...

I absolutely love my Specialized Stumpjumper HT 15.5 (26" wheels), so light and nimble - a dream for single-track and general xc trail-riding (and nice and nifty for running around town too) but post-pandemic have barely got out on her, and if I'm honest I no longer do big technical rides, and ha...

Okay, I know HOW to use the reserve tank on the rider mower, the switch is under the seat (see picture). What I don't understand is HOW the fuel gets into the reserve tank and, most importantly, if I don't occasionally use the fuel in the reserve, won't it get stale and how was the tank intended ...

In the September issue of the BMAA magazine, someone wrote in to say that whilst flying their C42, two typhoon fighter jets passed them (one either side) a few times at high speed, at the same altitude, before flying away. They said when they contacted the nearest tower frequency that they were t...

For real numbers $a_1, a_2, \dots , a_n$, let $p(x)= a_1 x + a_2x^2 + \dots + a_nx^n$ for all $x \in \mathbb{R}$. Suppose that $$\frac{a_1}{2} + \frac{a_2}{3} + \dots + \frac{a_n}{n+1} = 0.$$ Prove that there exists $x \in (0,1)$ such that $p(x)=0$. I realize that $a_1/2 + a_2/3 + \dots a_n/(n+1)...

For the most part, Isaiah 28 begins with a declaration of judgment against Ephraim (i.e. the most predominant tribe in the Northern Israelite Kingdom which suggests a parlance that would consider Ephraim to be representative of the Northern Israelite Kingdom). Isaiah 28:1-2 1 Woe to the proud cr...

When you pluck a guitar string, initially the vibration is chaotic and complex, but the components of the vibration that aren't eigenmodes die out over time due destructive interference. This ostensibly explains why the harmonics quickly become dominant. The problem with this model is that there ...

According to this AN : I do not understand how the inductance can reduce if the connector is soldered or not. I mean the length of the "traces" will not change. I agree that the resistance will change as there is a contact which is not as good as if it was soldered.

It's a short story, by a very well-known but not recent horror writer. It's at least 25 years since I read it, and it wasn't new then. It was about a man, perhaps a scientist, who discovered a portal to a new world. For some reason I feel it was in a tree/forest but I'm not definite. He watches t...

Suppose $$a= \prod_{i=1}^n \left( p_i e^t+(1-p_i)\right)\\b=(\bar{p}e^t+(1-\bar{p}))^n.$$ where $ \bar{p}=\frac{1}{n}\sum_{i=1}^np_i,0\leq p_i\leq 1,t>0,n\in \mathbb{Z^+}$. I need to know whether $b\geq a$ always. I tried simulating this with random values for the variables for $n$ as high as $10...

I am considering using Cloudflare CDN for my own website, which has a user base of 10.000 people. It's used world-wide, and there is a lot of room for caching, thus I wanted to use a CDN. However, I noticed recently, that I have to verify that I am a human at pages that use cloudflare (for exampl...

From this article: https://www.cnbc.com/2023/10/09/how-to-invest-1-million-for-the-next-decade-according-to-the-pros.html At the very end of the article: Cox suggested investing in actively managed funds only when investors seek dividend income during retirement. “You need to spend money to gener...

I am performing an analysis on different blood test values (in total 19). We aim to analyze if any of these blood test differentiate between 3 diseases, and also to predict 3 different outcomes. However we have also explored more outcomes (3 more). When performing the p value correction, I don't ...

I'm running macOS 11.7.10. I have an app which I always want to be running, and I have successfully caused it to start up whenever I log in. Often, I minimize this running app, and its Dock icon then shows it as running. I want to use osascript to cause this app to open when it's running but mini...

I have an old school bathtub where the drain is vertical at the end of the tub instead of flat and in the middle. So the all of the water doesn’t roll down all the way and some of it ends up sitting, stuck in the middle of the tub without draining. Any easy fix ideas besides replacing the tub or ...

I am calculating the apparent planetary position of planets using cspice library (I am specifically using rust-spice, which is a wrapper of cspice in rust) when I calculate the same values in horizons app there is a discrepancy between the results. The results in horizons vs spice: RA : spice: 1...