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00:17
4
Q: Bass score, what does "Maybe quarter notes" mean?

DustonI was playing "Elf: The Musical" this week and the keyboard player (playing the bass part) asked me what "Maybe quarter notes" meant. I figured it gave the option to either play quarter notes or half notes, but it did seem oddly unspecific. What was it they wanted her to play?

1
Q: Finding the velocity of an impact test

Dan KhanI am trying to find the velocity of an impact test. I am using a drop hammer impact machine to hit some composite specimens. I know the equation for the velocity is V = V0 + at ——————- (1) And that V0 = Vf - (at) ——————(2) And Vf = $\sqrt{2gh}$ ————- (3) Where V0 is the initial velocity, a is acc...

Law
Law
1
Q: Do persons accused of being "enemy combatants" have the right to a speedy trial, or can the US government hold them for as long as the govt wishes?

moonman239In a recent Senate session, they were discussing the release of all Guantanamo Bay detainees. Senator Lindsey Graham claimed that since the people held there were enemy combatants, they did not have the same rights as ordinary criminal enterprises, and that the US government can legally hold them...

2
Q: How to formally assign truth values to a proposition?

LinusDieLinseWhat is the correct way of formally assigning a truth value to a proposition? If $P$ is for instance true, can I just write $P = \mathbf{true}$? (Or 1 or T instead of $\textbf{true}$) Should I use another sign than "$=$"? What's the correct notation, what's the relation between a statement and it...

1
Q: Why can't you make cheese from coconut milk?

Dan R.People make yogurt by fermenting coconut milk. Why has no one ever made cheese?

00:32
1
Q: Classical fastest simulator for quantum circuits with only Clifford Gates

stopperWhat is the classical fastest simulator for quantum circuits with only Clifford Gates? And is there any "friendly" implementation e.g. in Python (or in some well-known libraries like Qiskit)? Fast simulators for quantum circuits with other constraints are also well accepted. Thank you!

3
Q: How much say do the actors of the Doctor have in how (s)he is portrayed?

ShadeWhenever a new actor portrays a new incarnation of the Doctor, the Doctor has like a completely new character and basically nothing in common with the last incarnation. How much saying does the actor have on the character of the new incarnation? E.g., do they get the scripts and have to play out ...

1
Q: Future-proofing paper and ink letter

BennetI would like to write a letter, in the present, addressed to my children in the future (no sad reasons involved; I just thought it would be nice to share my emotions of a new parent directly with my grown-up children, if with a long lag). The paper and ink would need to thus withstand about 20 ye...

00:51
1
Q: Where would be the best place to set up a government building in a world that constantly had earthquakes?

Sophie Parsonsso I’m trying to figure out where a government would set up their main base in a world where earthquakes and natural disasters are imminent and happening all the time. I want it to be iconic like in the Eiffel Tower or somewhere like that but I don’t know if that’s structurally secure? Any help w...

GIS
GIS
01:10
4
Q: Auto-filling when adding new value in attribute table in QGIS

ConnorI am trying to set up QGIS to work on gathering bird data. I have my attributes set up so that the common name, Latin name, quantity, date and other information is recorded. Is there a way to get the fields to always autofill with what I want I.E Common name is always blue tit rather than me fill...

2
Q: Array + Curve + Subdiv anomaly

NameKhan72I have an array of subdivided cubes, which follow a bezier-curve through a curve modifier. The individual meshes of the array are merged. The issue: Ordering the modifier stack like this (right): Array Subdiv Curve Provides the desired, smooth result. Ordering the Stack like this (left): Array...

DIY
DIY
1
Q: I have painted posts and unpainted horizontal rails on my fence. Can I stain the rails after I install them or will the stain harm the painted posts?

DbloomI currently have my 4x4 posts installed for my fence. I am going to be installing horizontal 1x4 redwood strips between the posts. I am going to seal the redwood with an oil based stain/sealer. Do I have to stain them before I install them on the posts? Or can I install them first and go back and...

5
Q: Etale fundamental group of the circle

coudyWhat is the étale fundamental group of the circle $X({\bf R})$, where $$ X(k) = \{(x,y) \in k^2 \mid x^2+y^2 = 1\}? $$ I know that there is a sequence $$ 1 \rightarrow \pi_1^{et}(X({\bf C})) \rightarrow \pi_1^{et}(X({\bf R})) \rightarrow Gal({\bf C}/{\bf R}) \rightarrow 1 $$ with $Gal({\bf C}/{\b...

01:36
1
Q: Where can I find Einstein's paper on relativity first to end?

Billy IstiakIs there online resource where I can find Einstein's all papers on Relativity. I found something here. But no title contains "Relativity". So I think I can't find what I was expecting but maybe I am lazy a bit.

3
Q: Generate periodically structured holes in non-linear mesh

Артур КлочкоI want to make a fence on a curved bridge. Currently a have a bridge mesh and a fence mesh, that repeats bridge curvature, but is solid. I need to make holes in that mesh as shown in the picture below. Obviously, I can manually create meshes, put them to the mesh and make hole by boolean modifier...

1
Q: When and where did Thomas Mann say that Effi Briest is one of the six best novels in his library?

TsundokuTheodor Fontane's novel Effi Briest is often taught at German schools. The Wikipedia article about the novel has a section on the novel's legacy which says, [Thomas] Mann said that if one had to reduce one's library to six novels, Effi Briest would have to be one of them. The source for that s...

2
Q: How to clean caked on stains from juicing vegetables?

MichaelI've got a "Green Star" twin gear juicer which I have used to juice a variety of vegetables, but mostly carrots and celery. I always juice the celery last, as that seems to minimize the amount of direct orange staining from the carrots. But over time I have noticed a buildup or "caking" of stai...

10
Q: Inscrutable IQ Tests

LOTGPI'm stuck on some of these IQ tests and I'd really appreciate some help deciphering them. Can you extract the message?

02:08
2
Q: Can someone explain this result? (Rule of three)

development mentorI have helped my cousin with homework. The homework goes: $6$ machines do the work in $210$ hours, how long will it take $10$ machines. Assuming the work is linear. I have solved that it is $0.6 \times 210 = 126$, as they will be working $40$ percent faster, therefore making the same in $60\%$ of...

2
Q: Differentiable vs continuous

yngablThe function $x\mapsto f(x)$ defined as $x+1$ for $x\geq 0$ and $x$ for $x<0$ has a jump at $x=0$. The derivative of $f$ is equal to $1$ on each sector and so $f$ is differentiable at $x=0$ and there is no gap in the slope of tangent lines. However the two tangents at $0^-$ and $0^+$ are not the ...

1
Q: High capacitance C0G (NPO) capacitor

Dimitri[EDIT] : modified the value of cutoff frequency to 4.8kHz after reading the answer of Andy aka. I need to build a LC high-pass filter that cuts at 4.8kHz with a fixed L value of 2.5 µH. As the cutoff frequency is 1/(2 Pi sqrt(LC)), that means I need a capacitance of 440µF to make it work. The thi...

6
Q: Are X-shaped stationary bikes any good?

Vilx-It's winter here and there's lots of snow which makes the streets narrow, and all the sidewalks are super slippery, and actual cycling is all but off the table. Me and my wife miss it. :) So we're considering getting a stationary bike. But our condo is pretty small, so we want something really co...

02:26
1
Q: Are the dependent claims still infriengble if the independent claim is meaningfully different from mine?

Chanoh ParkI have made a product and another company got a patent on a similar idea. Problem is that their first independent claim looks meaningfully different(in my opinion) from mine but there is the same idea among the dependent claims of the independent claim that might be critical and unavoidable. I wo...

TeX
TeX
2
Q: Latex3: handling of sub-functions with shared name sub-parameters

WDsgnI am using latex3 to write a set of macros. I have defined the nomeclature class, and a nominal case which comprehends all the possible combinations to be used in the test cases_i ( i = 1:N ). Now I want to create N test cases of the nominal. In some cases the parameter names are shared accros su...

2
Q: Relation between the maximum of a function and mean value of integral

freshprinter68I would like to prove that for a function $f$ which is $C^1$ defined on $[a, b]$ compact $$\max|f(x)|\leq \frac 1 {b-a}\left|\int_a^bf(x)\,dx\right| + \int_a^b|f'(x)|\,dx.$$ Because $f$ is on a compact domain it obtains its maximum at some $c$, so I can replace $\max|f(x)|$ with $f(c)$. The trou...

4
Q: Continuity of function - Proof verification

BalkysThis is question 11 of Section 5.1 of Introduction to Real Analysis Fourth Edition by Robert G. Bartle. Question statement Let $K>0$ and $f:\mathbb{R} \rightarrow \mathbb{R}$ satisy the condition that $|f(x)-f(y)|<K|x-y|$ for all $x,y \in \mathbb{R}$. Prove that f is continuous at every point $c ...

02:49
4
Q: Can I enforce monotonically increasing neural net outputs (min, mean, max)?

j sadHi I'm using a DL model (TensorFlow) to predict daily minimum, mean, and maximum values of a target dataset. I was thinking that the model would have 3 outputs for each day, (min, mean, max). Is there a clean way to enforce the correct order of these (i.e., min<mean<max)? I can add a penalty to e...

GIS
GIS
2
Q: Labelling with first letter taken from each word in string using QGIS

Tommaso SeI have a field called "Species" which is composed by two words (e.g. 'Robinia pseudoacacia') and I would like to extract the first letter of both the words in order to get two letters (e.g. 'Rp') in the label. There other word pairs in the field "Species" so I guess it needs a rule which specifie...

2
Q: Am I protected from Log4j vulnerability if I run Java 8u121 or newer?

AppleoddityAccording to the notes for CVE-2021-44228 at mitre.org: Java 8u121 (see https://www.oracle.com/java/technologies/javase/8u121-relnotes.html) protects against remote code execution by defaulting "com.sun.jndi.rmi.object.trustURLCodebase" and "com.sun.jndi.cosnaming.object.trustURLCodebase" to "false

3
Q: From which NASA publication originates/where can I find a higher resolution version of this SSME flow diagram?

Anton HengstThis came up when I was taking a look at Endeavour over in LA. Where can I find a readable version of this full flow diagram (valves, control systems, and everything)?

4
Q: Where to find organic molecules atomic coordinates

Carlos Andrés del ValleI have found many organic molecule databases, such as PubChem or chEMBL. But they don't provide the atomic coordinates of each atom on the structure. I'm especially interested in organic molecules that contain silicon. Where can I find these atomic coordinates?

03:12
6
Q: Why two computations for distance half way around the equator don't agree?

Ted ErsekI understand WGS84 models the equator as a circle with radius=GeodesyData["WGS84","SemimajorAxis"]. So I expected the two computations below to be the same. Where is my mistake? Pi*GeodesyData["WGS84","SemimajorAxis"] (* 2.00375 * 10^7 m *) UnitConvert@GeoDistance[GeoPosition@{0,0},GeoPosition@{...

03:33
1
Q: Can I import the wire from lwc without having to extend LightningElement

bkwdesignAm I allowed to use the wire service in an ES module, i.e. a 'headless' utility class? Or, must I extend LightningElement also? import {wire} from 'lwc'; import sapLogin from '@salesforce/apex/SAPService.login';//cachable=true export class SapSession { //sessionInfo = undefined;//EDIT oops d...

RPG
RPG
03:45
5
Q: How does the Harengon's Rabbit Hop racial trait interact with the Jump spell?

gybencskoIf my level 2 ranger casts the jump spell on our harengon monk, does his jump distance from his Rabbit hop racial ability tripled as well? Rabbit Hop. As a bonus action, you can jump a number of feet equal to five times your proficiency bonus, without provoking opportunity attacks. You can use t...

1
Q: How to detect if system is being altered at any given moment?

ceremcemI'm creating whole filesystem snapshots (with BTRFS) periodically. I need to prevent my script from taking snapshots while system is an inconsistent state, such as in the middle of an application installation or a full system upgrade. How can I reliably detect such actions? Like we can not invo...

2
Q: I'm an absolute beginner in bike touring, about to buy a bike. Is it worth it to hire a bike fitting service before the purchase?

Victor FI'm an absolute beginner in bike touring, about to buy a bike. Currently I'm using local shared bikes and I always wanted to start my adventures on a bike, camping and so on. Given this, is it worth it to hire a bike fitting service to help me with this choice or it may be overkill? I live in Ire...

04:17
4
Q: Finite *covering* groups that act freely on some sphere

Urs SchreiberA remarkable result (reviewed here) -- going back, at least, to P. A. Smith, developed by Cartan & Eilenberg and Milnor, and culminating in the theorem of Madsen, Thomas & Wall -- characterizes those finite groups which admit a free continuous action on a topological sphere in at least one dimens...

04:29
1
Q: Causal inference where potential outcome is somehow "violated"?

RyanThe fundamental problem of causal inference says that only one potential outcome is observed for each unit. What happen if both outcomes from control and treatment can be observed? Can we still make use of analysis tool like causal tree to understand heterogeneous treatment effect? As a concrete ...

GIS
GIS
2
Q: Returning majority of array elements in QGIS expression

parallaxI need to identify the majority of a string in an attribute field. For example 'A,AB,C,A' -> 'A' Since QGIS 3.18 the function array_majority() is available. However, I use the latest stable version 3.16 and I am wondering if something similar can be done? Something like: array_to_string(majority(...

3
Q: How might nuclear power have never been developed?

Adam ReynoldsI've been thinking about a world in which nuclear power and nuclear weapons were never developed. What kind of mechanism would allow this to be possible? Nuclear weapons seem the easiest option, with fears of of nuclear proliferation leading to various nations agreeing to dismantle and refuse to ...

3
Q: Risks of Using SHA1 Instead of SHA256 for RSA with OAEP Padding

azoundriaI'm presently implementing a simple RSA-based encryption as follows in PHP (using openssl_public_encrypt): // $sRawText is the text string to encrypt. // $sPublicKey is the public key stored on the server. openssl_public_encrypt($sRawText, $sResult, $sPublicKey, OPENSSL_PKCS1_OAEP_PADDING); // $s...

2
Q: Should one learn the math of quantum computing from a "pure" perspective, or are quantum computing texts "good enough"?

user2521987Math for quantum computing includes advanced linear algebra, functional analysis, group and representation theory, probability theory, and more. There are plenty of pure math books out there for those, but there are also quantum computing/information theory books that contain only the parts relev...

04:53
3
Q: Splitting a list into sublists at provided markers

SyedFor a list of strings (or other elements): SeedRandom[3]; t1 = Table[RandomChoice[CharacterRange["A", "E"]], 20] {"D", "A", "B", "C", "A", "A", "E", "C", "C", "C", "B", "A", "A", \ "C", "B", "D", "D", "A", "B", "C"} I want to split the list starting at a certain symbol (say "B"): t2 = Split[t...

2
Q: What is the French adjective when a person is no longer able to feel emotions i.e. when emotions no longer appear in their heart/chest?

CFrenchWhat is the French adjective for when a person is no longer able to feel emotions i.e. when emotions no longer appear in their heart/chest? Scenarios Person 1: I heard of the passing away of his child. How is he? Person 2: He is … Person 1: I heard his partner broke his heart. How is he? Person 2...

1
Q: Encode a set of skills into a feature

Luís CostaI am working with a dataset where users have a set of skills. I have more than 500 skills and I was wondering what is the best way of encoding a vector, e.g., ['java', 'python', 'c'] into a feature, so it would be possible to use the user skills as features. I thought about one-hot-encoding but I...

05:08
6
Q: A "Thousand and one nights" semi-short fantasy about a door to the past or the future

AlfredI read this novelette or shortish novella about 10 years ago, maybe less. It is in a strong "Thousand and One Nights" atmosphere. It is about a magician (probably in Baghdad at the time of Harun Al Rashid) who knows how to make "time" doors : stepping one way takes one to the future, the other wa...

05:23
6
Q: Why does the first element outside of a defined array default to zero?

ciarancI'm studying for the final exam for my intro to C++ class. Our professor gave us this problem for practice: Explain why the code produces the following output: 120 200 16 0 using namespace std; int main() { int x[] = {120, 200, 16}; for (int i = 0; i < 4; i++) cout << x[i] << " "; } The sa...

2
Q: What jacket should I choose for winter trekking?

Alex J.I can't stay in house much more this winter I need to go on longer hikes. I am used to longer hikes up to 14 days, but not during the winter. I want to do 1-5 day hikes in winter in dry weather, temperatures: - 12C(10F) to +5C(41F). The temperatues will be mostly 0 to -5 degrees Celsuis. There wi...

05:43
2
Q: How to parallelize and speedup AppendTo?

stringSay I have a list of original data (for now generating random list as follows): r[i_] := RandomReal[{0.1, 1}]; R[i_] := RandomReal[1, 5]; data = Table[{r[j], R[j]}, {j, 10^5}]; Now, I want to divide the original data into three categories: (i) category#1: first entry of data less than 0.2 (ii) c...

ELL
ELL
1
Q: Can everyone give us (their/your) takes on this?

JOUAI wanted to talk to a bunch of people, asking them to share their opinions. I wanted to say: Can everyone give us (their/your) takes on this? So, I'm not sure whether I should use "their" or "your". Supposing that this sentence is true: Everyone, please give us your takes. "their" seems to be...

1
Q: How to authenticate and push to GitHub from a CI Script

PrestonDocksI keep my development on a personal GitLab server. In my CI/CD script, I want to push the repository to a public GitHub repo when a new tag is created. The CI/CD runs in an ephemeral Docker container, so there are no credentials stored. I can however add secrets in GitLab, but I don't know what g...

5
Q: The urban gardener

SlowMagic You are the urban gardener of Wordtown and you would like to plant a letter at each intersection (marked with "#") such that every street becomes a familiar word. Horizontal streets must read from left to right, and vertical streets must read downward. This is word sudoku because every junction...

06:48
7
Q: PSE Advent Calendar 2021 (Day 14): An international reunion

JafeThis puzzle is part of the Puzzling StackExchange Advent Calendar 2021. The accepted answer to this question will be awarded a bounty worth 50 reputation.< Previous Door Next Door > This is a "cryptic family reunion" puzzle. The answers to the twenty cryptic clues below all share a common theme. ...

RPG
RPG
07:07
5
Q: What issue is addressed by the errata for Gathered Swarm in Tasha's Cauldron of Everything?

orderWizards has released Tasha's errata. Some of them are quite enigmatically worded, such as: Gathered Swarm (pg. 60). In the second sentence, “Until you die” has changed to “While you’re alive.” What is the distinction between "until death" and "while living", and why is it so important? Is there...

2
Q: Does Alternator Self-Excitation Require Rectification?

Ned RuggeriI am learning about self-excitation in alternators. My understanding is that there is residual magnetism in the rotor. As it spins, this generates a current in a stator which is then fed to the (rotating) field coils to increase the strength of the magnetic field, and thus the output voltage. If ...

2
Q: Minimizing taxes on dividends

PanicI own stocks and ETFs in my taxable brokerage account at Vanguard, and these securities generate taxable dividend income every year, which is a problem. How do I fix it? It was a bad idea on my part: instead of ETFs, I should have bought mutual funds. Also, it's better to keep dividend-paying sto...

07:22
3
Q: Can a local Ubuntu mirror host different Ubuntu releases on a single server

adamtjgogoI am interested to know if I have a Ubuntu 20.04.3 LTS server, can use it as a local mirror to host 20.04.3 LTS and 18.04.6 LTS repositories, such that my 18.04 servers can pull from it as well as my 20.04 servers? Or, do I need 2 separate servers, one on version 18.04 and the other on 20.04? Is ...

2
Q: Is changing the exception a method throws a breaking change for a library?

K-RUSHerI have a library that I am distributing on maven in the new version I will be changing the exceptions some methods are throwing. Is this considered a breaking change? If this is the only change in the new version, should I increment the major version (I am using SemVer 2)?

11
Q: Xcode Workspace "Internal error: missingPackageDescriptionModule"

PetersesAfter updating Xcode to version 13.2 i can't build my project anymore. I have a strange error "Internal error: missingPackageDescriptionModule" related to my Workspace file. It's definitely related to SPM because Xcode is not loading SPM packages also. I tried to "Reset package caches", "Resolve ...

4
Q: In a semigroup does left identity and right inverse imply a group?

Maths WizzardSay we have a set $ G $ with the properties $ G $ is closed under some opperation $ \circ $ $ G $ is associative under $ \circ $ There exists an element $ e\in G $ such that for every $ g \in G $ we have \begin{align*} e\circ g=g . \end{align*} For every $ g\in G $ there exists $ g^{-1}\in ...

DIY
DIY
07:57
3
Q: Is this a bunch of wrong MWBCs?

ScottI've just opened up my main panel with the plan of adding a new circuit, but have temporarily aborted that idea after squinting for a while, followed by getting worried. I put some pictures from more angles at https://imgur.com/a/TZkSZQi. There's quite a lot of 14/3 (or 12/3) wires running runni...

RPG
RPG
08:22
2
Q: Selecting Hit Die for Half Casters

linksassinI'm in the process of homebrewing an arcane half-caster for one of the players in my next campaign. One point that concerns me is whether I should give a d10 or a d8 hit dice. I want it to be comparative to existing half-caster classes and subclasses but there is a bit of a mix. My belief is that...

08:38
10
Q: AoCG2021 Day 14: Adjusting dancing program's period

BubblerPart of Advent of Code Golf 2021 event. See the linked meta post for details. Related to AoC2017 Day 16. I'm using the wording from my Puzzling SE puzzle based on the same AoC challenge instead of the original AoC one for clarity. \$n\$ people numbered \$1, 2, \cdots, n\$ are standing in line in...

08:49
3
Q: Identify this set - bags with white, grey, brown and blue bricks

Vin.FFound these two bag from a box of toys given by friend And they don’t have any idea what set the bags belong to. The QR code on the bag shows 6172092, googled it but no luck. Can anyone help? Thanks

09:27
5
Q: Can you cast a spell while casting a spell?

GrimmySuppose I start casting a simple spell, such as Sol Ring. I follow the steps in rule 601, up to 601.2g, which is where I get a chance to activate mana abilities. I tap Selvala, Explorer Returned, which makes me draw as part of her mana ability. My Archmage Ascension replaces the draw with a libra...

3
Q: How to set time zone for `DateListLogPlot`?

John DotySample data: toyData = { {FromDateString["2021-12-05T22:32:00", TimeZone -> 0], 1}, {FromDateString["2021-12-05T23:32:00", TimeZone -> 0], 2}} Plot: DateListLogPlot[toyData] Although the data is given with TimeZone->0, the plot is in my local time zone (-5). How do I get a plot in UTC (or ca...

1
Q: Would a person adapted for super-speed be super-strong too as a side effect?

CA PichowskyOr am I just overthinking it? Maybe I should note that the character is like 76% magical entity, so maybe it can simply be handwaved, but I wanna check if I can blend in some science in there, too. To clarify, I am looking for a reason for him NOT to be super-strong, but if it's unavoidable then ...

09:44
1
Q: Were Otto Octavius's extra arms controlled by an AI or used as an extension of his own mind?

Peter NielsenIn Spider-Man 2 (2004), Alfred Molina plays Doctor Otto Octavius, the antagonist. He wants to create sustainable energy, and creates a set of four extra arms that are hooked up to his back. He is able to control the arms, it seems. Are the arms controlled by an AI attuned to Otto's mind? Are they...

10:04
3
Q: Determine whether a polyomino has a hole

Nick CSuppose I know the $(x,y)$ coordinates of the corners of all the unit squares making up a connected polyomino. Is there a simple/elegant way to determine if the polyomino has a hole in it, merely by using these coordinates? Polyomino with no holes: Polyomino with two holes: Note: I've already d...

10:21
6
Q: What game is this? (First-person character holding an orange mass labeled "Paleberry")

Guest15335 I found this picture on a discord server and I was wondering what it was.

1
Q: What is the "bag on a stick" Hercules is holding in this picture?

PiovezanSorry, I'm on a cell phone and could not hard-link the picture, which is at the top of this page, inside a circle: https://www.greekmythology.com/Myths/The_Myths/Labours_of_Heracles/labours_of_heracles.html Hercules/Heracles (or is it King Erystheus?) is depicted sitting on a chair or a throne, w...

10:47
3
Q: Why is there one fewer solar day per year than there are sidereal days?

versinesolar day = time between solar noons sidereal day = period of Earth's spin Wikipedia says "relative to the stars, the Sun appears to move around Earth once per year. Therefore, there is one fewer solar day per year than there are sidereal days." Shouldn't it be relative to the Earth instead of th...

CS
CS
2
Q: Is "Palestina" an Anachronism?

TauIsaiah 14:31 says, "Howl, O gate; cry, O city; thou, whole Palestina, art dissolved: for there shall come from the north a smoke, and none shall be alone in his appointed times."(KJV) The Tanahk says, לאהֵילִ֚ילִי שַׁ֙עַר֙ זַֽעֲקִי־עִ֔יר נָמ֖וֹג פְּלֶ֣שֶׁת כֻּלֵּ֑ךְ כִּ֚י מִצָּפוֹן֙ עָשָׁ֣ן בָּ֔א...

TeX
TeX
3
Q: How to delete the sphere that is inside the cylinder?

PT SinhPlease help me, I want to delete the sphere that is inside the cylinder. How can I do this? This is my code. import solids; size(10cm,0); currentprojection=perspective(camera=(5,-4,2)); viewportmargin=(.5cm,.5cm); path3[] p=reverse(scale3(2)*unitcircle3)^^shift(.9999,0,0)*unitcircle3; triple f(pa...

11:18
2
Q: How F1 score is good with unbalanced dataset

AvvI have read around on this site that it's recommended to use F1 score if the dataset is imbalanced and if you want to seek a balance between recall and precession. Could you please explain how F1 can be useful in terms of imbalanced dataset?

6
Q: Is this a known method for solving linear equations in 1 variable?

DreiCleanerI thought of a method to solve linear equations in one variable and I want to know if this is a well-known method or not. It's an elementary method, which makes me think it has probably been known for a thousand years, yet I can't find any information about it online. Given a linear equation with...

12:04
3
Q: I am an assistant professor. In an email, how should I address an associate professor in a different university with no prior contact?

user1849133I am an assistant professor outside the US. I want to email an associate professor in another university in the US, who I haven't talked to before. He's American. It's just because I want to discuss his paper. I agree with his paper, so the discussion will be most likely "nice". Which is better? "...

12:18
1
Q: When do we need 'are' in german sentences?

666User666Consider this sentence: du spinnst It means you're crazy. Now, where did the 'are' come from? One may assume from this example that the 'are' comes with the verb but in other cases we have to explicitly write out 'are' using conjugations of sein (bin, bist etc). Question: When do we need to exp...

12:34
3
Q: Finding eigenvalues of a large matrix close to a given value

tunaIn an address from 1997, Carl Cowen said: [I]n 1974, a graduate student friend studying civil engineering and working on modeling vibrations in buildings caused by earthquakes asked me how he could find the eigenvalues of a $200×200$ matrix that were close to $12$. (Unfortunately, at the time, I...

13:21
2
Q: Need help creating a tire

hmike00I am very new to Blender so please excuse my ignorance about the program. I am trying to create a tire (which is a tractor tire) for a model and am having trouble creating it. I will attach a picture of what I am trying to create and a picture of what I have been able to do. I first start with cy...

14:02
1
Q: What music theory parts do I have to know by heart to be able to name notes in a given chord?

ZenBerryI'm preparing for a music institute audition. Say, the task is to name notes in B Maj 7. For doing this, I have to learn by heart: The circle of fifths (to know how many sharps/flats are in B major) The order of sharps and flats (to know which sharps/flats are there) The steps in a major 7 cho...

CS
CS
1
Q: Why do parts of the community object to mandatory vaccination, when practically all of them were vaccinated as children?

smthjmFor what reasons do such a noticeable percentage of the community object to mandatory vaccination for COVID-19, when practically all of them were vaccinated for things like measles, chicken pox, when they were children? The problem is whenever I remember that practically all anti-vaxxers would ha...

3
Q: Is Deuteronomy 23:23 a free will offering?

collen ndhlovuKJV Deuteronomy 23 : 23 That which is gone out of thy lips thou shalt keep and perform; even a freewill offering, according as thou hast vowed unto the LORD thy God, which thou hast promised with thy mouth. Could the above offering be a free will offering seeing it also involves a vow

1
Q: How do desktop applications get notified of events over the internet?

LevelRinI would like to display something on my desktop by tapping a button on my mobile app. For example, there is a "show cat" button on my mobile app. When I tap that button, a new window should be opened and display a cat picture on my desktop. The scenario is a bit similar to Zoom. The desktop appli...

14:27
1
Q: Which audio processing techniques lead to soft, warm, velvety, ASMR-like kind of sound?

ZenBerryThe goal is to create as soft music as possible. It might be EQ, tube preamps, saturation, compression, recording on tape, tape delay, certain mic positioning, or something else. I just don't know from where to start this beautiful quest of making the softest music I can. Might you please suggest...

14:43
6
Q: Christmas tree LITSO

BubblerInspired by PSE Advent Calendar 2021 (Day 13): A Christmas Hokuro, I challenged myself to create a Christmas tree-shaped puzzle. Unfortunately I had to edit the shape a little bit because... reasons. Hope it still looks close enough. Rule of LITSO: Divide the grid into tetrominos so that two ide...

3
Q: iPhone 12 camera inserts unknown icon in photo of crossword puzzle

exbctelI photograph solved crossword puzzles at nyxcrossword.com. I use the photo as answers to the same blank puzzle I am trying to solve. I use an iPhone 7 recently upgraded to iOS 15.1.1 Since the upgrade I am getting an icon in the lower right corner. I did a reverse image search of the icon at imag...

TeX
TeX
15:00
1
Q: Center environment doesn't center a TikZ figure

TonyKIt seems to be lots of problems like this in the archive but none seems to match mine. I have a TikZ figure that depends on \draw. I know that keys off an assumed Cartesian plane and maybe that is the problem with centering -- if so I might be screwed. Anyway, here is the code: \documentclass{ams...

DIY
DIY
2
Q: Stains in grout

Martin ArgeramiFor a tiling job, I used this charcoal grout: After a few days, as indicated by the instructions, I applied this sealer: A few minutes after applying the sealant, these white stains appeared randomly in the grout: It's been a few days and the stains are still there. What should I do about them...

15:20
4
Q: Has LSD 'been widely used in hospitals for the treatment of mental disorders'?

tuskiomiOperation Moneybags is a video purporting to be a documentary covering medical experiments on British troops, The film has an opening card (27 seconds in) stating: This film was made during the course of an experiment to test the possible effects of the drug, lysergic acid diethylamide - LSD 25 ...

 
1 hour later…
16:38
2
Q: Where in the registry are the context menu options for 7zip?

BasjI'd like to edit the context menu options for 7zip in the Windows File Explorer. More precisely, I'd like to replace Add to archive... by &Add to archive to be able to use a keyboard shortcut like APPS KEY +A to open this. In which regedit keys/values should this be done? In: HKEY_CLASSES_ROOT\F...

2
Q: Opponent has unbeatable bomb, do I sideboard in narrow hate card or hope they don't draw it?

AllureLet's say I'm playing limited and my opponent has an unbeatable bomb. The bomb is so powerful that it effectively beats my deck on its own if it resolves. Examples of such bombs could be: Dream Trawler, The Immortal Sun, Primeval Bounty, The Scarab God. After losing game 1 to the bomb, it's now s...

5
Q: Function that does for Map what Through does for Apply?

theoristThrough allows multiple functions to be easily applied to a single argument. For instance, suppose I wanted to count the number of the characters in {"t", "o", "d", "a", "y"}, and also join them into a single string. Then I could do: s1 = {"t", "o", "d", "a", "y"} Through[{StringJoin, Length}[#]]&

TeX
TeX
3
Q: How to position a TikZ picture relative to text?

Evan AadThe following question has essentially already been asked on this website (not by me), however none of the answers are satisfactory for my purposes, so I'll ask it again in a way that will hopefully elicit helpful answers. Consider the following LaTeX document containing two sentences. \documentc...

RPG
RPG
7
Q: Can dominate monster and drowning be used as an insta-kill?

RedGeomancerIn a convention scenario that I played in, creatures used dominate monster on a player character, and taking "total and precise control of the target", ordered the character to jump into a convenient pool of water and inhale deeply. On the character's subsequent turn, the character jumped into th...

2
Q: Budget Analysis Program

Jims-RcI have written code for a budget calculate program. Here is the problem : Write a program that asks the user to enter the amount that he or she has budgeted for a month. A loop should then prompts the user to enter each of his or her expenses for the month and keep a running total. When the loop...

GIS
GIS
17:10
0
Q: Joining attributes in CSV by location using QGIS

OgeiDI have a shapefile which divides Africa in cells of 0.5x0.5 decimal degrees. This documents provides the longitude, latitude of the centroid of the cell and a unique identified of each cell. On the other hand, I have a CSV file with different observations and different variables, including longit...

1
Q: JSON how to check @me belong to particular SharePoint group

kumarHow can I check in JSON that current user @me belongs to particular SharePoint admin group if its does not belong hide the column. "customRowAction": { "action": "setValue", "actionInput": { "PersonColumnInteranalName": "@me" } }

TeX
TeX
18:04
2
Q: How to position a TikZ picture relative to a \tikzmark?

Evan AadThis is a follow-up to this question. I'd like to achieve the same output as described in the question, namely a 1cm wide square that is 1cm below and 1cm to the right of the red dot in the following illustration (the dot should not appear in the output): Taking a lead from this answer, I've att...

2
Q: Why isn't Ninigi considered the first emperor of Japan?

Shin BikkurimanMost references indicate that Amaterasu decided that Japan needed an emperor and she sent her grandson, Ninigi, to rule; however, they always refer to his grandson (great-grandson), Jimmu, as the first emperor. edited: Further research shows that he ruled in an area near Kagoshima and Jimmu estab...

2
Q: Blender 3.0 renders only half when in 4k

Sergej GlacierI know there are a lot of threads similar to this, but I did not see one that has the same problem. Everything is fine with render when it is set to 1080p, but when I set it to 4k it renders only half of camera. I tried a lot of different projects and no change, only half renders.

DSP
DSP
4
Q: Advantage of STFT over wavelet transform

Hyun-seob ShinI have learned about STFT and wavelet transform recently, and wavelet transform seems better than STFT in my opinion. So, I wonder if there is any advantage of using STFT than WT, and if so, what are practical applications of STFT?

7
Q: I hate word searches

msh210In the following grid are 38 nouns that have something in common. (I use "nouns" loosely, including, for example, noun phrases and proper nouns.) Their respective enumerations are: 4; 4; 4; 4; 4; 4; 4; 4; 4; 4; 5; 5; 5; 6; 7; 7; 7; 7; 7; 7; 2,6; 3,5; 5,3; 8; 3,6; 4,5; 9; 4,6; 5,5; 6,4; 7,3; 10; 1...

18:26
2
Q: Symmetry Properties of Wigner's Matrices

B.HueberI have an expression of the form $$S=\sum_{m,n=-j}^{j}(-1)^{m-n}D^{j}_{mn}(g)D^{j}_{mn}(g)$$ This is the end result of a long calculation, from which I am pretty confident that it is correct. For a number of reasons, I expect that it should be possible to write the result in terms of the characte...

18:37
2
Q: Recurrent definition of alcohol content via hazing (5, 2, 9)

JohnRecurrent definition of alcohol content via hazing (5, 2, 9). I'm completely stumped. It's a stand alone clue. Not part of a crossword.

GIS
GIS
18:50
4
Q: How to create a polygon around a set of points without blank polygon spaces in between in PostGIS?

George VI want to create a polygon around a set of points which should exactly just contain the set of points without leaving any blank spaces in between. Below is the best output I am getting after using ST_ConcaveHull a) With Allow holes set as false b) With Allow holes set as true As it is clearly v...

19:02
11
Q: 2011-2013 Movie about a guy who can shapeshift an arm into a blade and is chased by an organisation of people like him

Dw LonewolfI'm looking for a movie about a guy who can shapeshift his arm into a long greyish bone blade. He acquired this some time into the movie I think he moved to a new town. He tries reporting weird occurrences he sees in the new town to the cops (if I'm not wrong). This leads him to being chased by a...

19:23
1
Q: Integral of probability density over a Borel set

NamelessI have a random variable $\xi : \Omega\to\mathbb{R}$ which distribution function has a density, so by definition I have that the probability measure of each $(-\infty,x]$ can be calculated by: $$F_\xi(x)=P_\xi (-\infty,x]=\int_{-\infty}^x f_\xi(y)\mathrm{d}y \quad (1)$$ where the integral above i...

19:52
2
Q: Three horse race

Dmitry KamenetskyThere are three horses in the race. You know the following information about them: Horse A will finish the race in 50 or 60 seconds with both events being equally likely. Horse B will always finish the race in 55 seconds. Horse C will finish the race in 53 or 57 seconds with both events being eq...

TeX
TeX
20:09
6
Q: \widering over \bar not working

Juan CastañoI need to write a topology expression involving the interior of the closure of a set. For the interior of a (not simple) set I'm using the macro \widering from yhmath package and it works fine if I write the closure with \overline. But I'd like to use instead \bar if the set involved is simple. H...

20:36
3
Q: What could make a good equivalent to late 1700s/early 1800s rifles/rifleman for a near future setting?

OT-64 SKOTWhat could make a good equivalent to late 1700s/early 1800s riflemen in a near future setting? The The important qualities are that they're elite, use long range man portable weapons, & have it make sense to have them employed on the scale of battalions/companies primarily built around them & are...

20:56
2
Q: Interaction with odd number of fermionic fields?

RedGiantCan there exist an interacting part of the Hamiltonian with odd number of fermionic operators? In other words, can we have a vertex which couples an odd number of fermions (there can also be 1, 2, or arbitrary number of bosons)? It seems that none of the theories I know of satisfy this condition:...

21:17
2
Q: Random access to SD card using SD.h or another library (ESP32)

AlexSp3I'm trying to use a SD card with my ESP32 in order to save some variables in a txt file. Each variable uses 1 byte, so they can be represented by an 8 bit extended ASCII character. The issue is it seems that the SD.h library has only 3 open modes (Read only, FILE_WRITE, FILE_APPEND), and I cannot...

DIY
DIY
1
Q: How to test whether or not a breaker is powering a zone valve and thermostat?

hotmeatballsoupI have a fuel burner (fuel oil) that heats water and provides my home with baseboard heat. I have two thermostats and zone valves, both by White Rogers (and both pretty old): one set for the downstairs and one set for the upstairs. I assume that each zone valve + thermostat pair is part of the sa...

1
Q: What is x and y?

NabilaWe need train & test data, so what do x and y mean? Does it mean that it divides 15% to the 'x_train', 'x_val', 'y_train', 'y_val' ? x_train, x_val, y_train, y_val = train_test_split(x, y, test_size=0.15, shuffle=True)

21:36
2
Q: Is it outlawed to start Chapter one with the villain and only mention the protagonist?

WillyAChapter 1 takes place in 1953. A girl is kidnapped. She manages to write a note to her friend (they both go to school together but the boy has moved). The letter is destroyed. Her friend is the protagonist. I wanted a good 'hook', which it is, but the protagonist is only 9 years old at the time o...

1
Q: Reset cache for a site in different browsers

AndreiI need to test a site in different browsers. Clearing browser cache deletes cache for all sites. How to clear or reset cache for a particular site in different browsers?

CS
CS
1
Q: Do any languages use words like particles to represent commas, periods, hyphens, quotes, parentheses, etc.?

Lance PollardWondering if any languages use words, particles, or other speakable markers to represent punctuation like periods, commas, hyphens, quotes, parentheses, question marks, exclamation marks, or potentially others (colons, etc.). For example, I think I may have read of a language (maybe Chinese) whic...

21:58
8
Q: Looking for the Justice League (?) comic book that has the cover page mentioning the Coronavirus (?)

ShreedharIn one of the episodes of The Big Bang Theory (Season 12, Episode 12), when Raj gets a call from his dad, there are some comics on his table one of which had the title "The Coronav___"; maybe thats why it caught my eye (images below, click to enlarge). I was curious and tried to find this comic...

1
Q: How can this circuit oscillate at a VHF frequency?

GuilhermeI am practicing RF. I have looked at an FM transmitter circuit in a video. I went on to analyse it. When the analysis got to the tank resonant circuit, I could not get it. This parallel LC circuit is a pass-band circuit. This means it will increase the impedance when the frequency of the signal ...

6
Q: Is there a good equivalent for the Italian proverb "Non tutte le ciambelle riescono col buco"?

DjinTonicOne of my favorite Italian sayings is Non tutte le ciambelle riescono col buco (literally "Not all donuts come out with holes"). It usually gets a smile from another Italian speaker, because it's a nice way to conclude (even serious) discussions about things that are complex and not working 100...

1
Q: Legality and morality around wearing a red / blue flashing light on a bicycle in the UK?

PyRsquaredI recently bought a red and blue flashing light to wear on my helmet when I cycle into work in London. I abide by road rules, cycle safely, never cycle on footpaths, obey stop signs and traffic lights etc, so my intent here is not to dash through red traffic lights whenever I want. But it is incr...

13
Q: How does the log4shell vulnerability work?

AndersLog4shell is making the news. A vulnerability in the widely used logging tool Log4J is putting many servers and even some desktop applications at risk of remote code execution. How does this vulnerability work? What sort of mistake makes it possible? It is something about format strings and ${jnd...

TeX
TeX
22:16
2
Q: pgfplots: How to position the second label in a two-axis plot?

PatrickTHow to position the second label above the second axis? In the MWE below, simply declaring \pgfplotsset{compat=newest} solves the problem. However, I would like to control the label position locally in a document where the compat bounds cannot be set (think of it as temporary workaround). Is ther...

1
Q: I think my client is holding my work out to be his own

Joe SmentzI think one of my clients (let's call him Stan) is actually doing client work for someone else (let's call him Fred) (who I thought was their business partner), and holding my work out to be their own and charging even more for it. I am a developer with a pretty strong software development backgr...

3
Q: Discrepancy when using .step command in LT Spice

CarlI have a transistor circuit where I wish to determine the transistor dimensions W and L, such that \$V_{out} = 1.5\text{V} \$ I have defined W and L for the two NMOS transistors. I have set L = 1u in the PMOS transistors and then I am sweeping through W to find a suitable value, such that \$V_{o...

Law
Law
22:41
3
Q: If applied in the United States, what is the most obvious legally functional difference between the British and American "mirandizing" phrase?

isakbobIn the United States, police must read your rights regarding police questioning as shown below1: “You have the right to remain silent. Anything you say can and will be used against you in a court of law. You have the right to an attorney. If you cannot afford an attorney, one will be provided fo...

1
Q: Cleaning up interface

EpicrexIs their some way of removing these useless tool buttons below the axis viewer. They are so often in the way. In viewport gizmos one can toggle navigate but that removes all of this.

8
Q: Why is this position in the 3.d4 d5 Petroff equal?

AKematsI'm trying to learn some theory about the Petroff and was reading about the 3.d4 d5 sideline. Eventually, the position below is reached. [FEN ""] 1.e4 e5 2.Nf3 Nf6 3.d4 d5 4.exd5 exd4 5.Qxd4 Qxd5 6.Qe3+ Qe6 7.Bb5+ Nc6 8.Bxc6+ bxc6 9.Nc3 What I can't wrap my head around is that Stockfish says tha...

3
Q: How do I know if I've bought the right tire?

surrey_cyclistUPDATE: Big thank you to all those who gave me advice! It led me to believe that there was nothing really wrong with my new tire, rather with my method of putting the tire on. There was no need to return the tire and exchange it for a smaller one - I used a "trick" of putting only half of the tir...

23:03
1
Q: Inverse of the Jacobian in the Finite Element Method

Mohamed AbdelhamidIn Bathe's Finite Element Procedures 2014 P346, the Jacobian is defined as follows: \begin{equation} \mathbf{J} = \begin{bmatrix} \frac{\partial x}{\partial r} & \frac{\partial y}{\partial r} \\ \frac{\partial x}{\partial s} & \frac{\partial y}{\partial s} \end{bmatrix} \end{equation} I need to c...

2
Q: How to mark the changes in a resubmisison?

randomnameWe have a journal paper that got correction requests and need to be resubmitted. The changes need to be highlighted in the manuscript. How do you mark the changes? Is changing the text color enough? What if the reviewer/editor does not have a colored printer? or has color blindness? I tried under...

8
Q: What does Heron's formula naturally deform?

StudentFixing three real numbers $a,b,c>0$ determines a triangle with side-lengths $a,b,c$ (if admissible). Therefore, the area of a triangle is a function in $a,b,c$. Due to the geometry of a triangle, we know that the area is a symmetric function in $a,b,c$. Indeed, Heron formula shows that $$area(a,b...

23:26
3
Q: Do we actually take random line in first step of linear regression?

F.C. Akhi This is the screenshot I took from a video on Linear regression made by Luis Serrano. He explained linear regression step by step (scratch version). The first step was to take a random line. The question is do we actually draw a random line. Or we do some calculation like taking an average of y ...

5
Q: Can you update an asset once you've used it in other files?

Mark RobinsonSo I'm loving the asset browser in 3.0 but I have a question. Say you've created a character, marked it as an asset and saved the Blend file in your designated asset folder. However, after employing it in a couple of other Blends, you go back to the original asset file and add, for example, a few...

3
Q: Evaluating an improper integral using the Residue Theorem

Viola PlayerI have: \begin{equation} \int_{-\infty}^{\infty}\frac{x^2}{(x^2+1)(x^2+9)}dx \end{equation} and I want to solve it using a complex closed contour on C. I do the following: \begin{equation} \int_{-\infty}^{\infty}\frac{z^2}{(z^2+1)(z^2+9)}dz \end{equation} which clearly has 4 poles, $\pm i,\pm3i $...

4
Q: What is this sed doing with the script: `$a\`?

Oliver LortonI've come upon this sed command and I cannot figure out what it is doing. I understand that it is changing a file in place using -i, that it is using a script -e and that the script is $a\, but what is this script doing? sed -i -e '$a\' filename

23:47
1
Q: Why is it not possible to get the private key out of the public key

Purple GangHow I understood it, the equation for the public key is defined as so K = k * G With K being the public key, k the private key and G the generator point. Now my first question, is G a constant? (as far as I read, it is a constant) And if it is, how is it not possible to simply do K/G = k? And i...


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