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00:00
2
Q: How to handle multi-collinearity when all the variables are highly correlated?

Dushi FdzIn my dataset, all the variables are highly correlated (correlation coefficient > 0.95). However, the correlation with the dependent variables is very low (<0.35). I checked the variation inflation factor (VIF), but it's 'inf' for some variables and very high (around 6 figures) for other variable...

CS
CS
00:22
3
Q: If dark matter was created in the early universe and its formation released energy, is there any evidence of that energy in the cmb?

DaveTheWaveWhen atomic nuclei fuse, energy is released. Is there anything about the CMB energy distribution that suggests that dark matter could have formed from other particles that released energy?

00:40
4
Q: How did StorageTek STC 4305 use backing HDDs?

Vitaly IsaevStorageTek STC 4305 is often referred as the first SSD. However, from the modern point of view, it looks more like a "hardware-implemented persistent cache", if possible. I mean that it works more like a fast volatile storage (RAM) backed by slow non-volatile memory (HDD). But how was the interac...

HSM
HSM
01:01
1
Q: Is Koestler's ‘The Sleepwalkers’ still well regarded? Is there a more recent similar source?

Norman GrayArthur Koestler's The Sleepwalkers is well-known as both a group biography of Copernicus, Brahe, Kepler and Galileo and an account of the revolutionary turn in astronomy that, in Koestler's phrasing, they ‘sleepwalked’ through. I think it's an excellent text, and I'm not aware of that being a fr...

01:12
8
Q: Book about a good dark lord, think "not Sauron"

Torsten GangI started reading this book earlier this year at my library and haven’t been able to find it again. It is about a “dark” lord who was once part of a group of gods? God like beings? I think there were seven(maybe more, maybe less). They had some disagreement about how life should work (free will r...

3
Q: So what *is* the Latin word for “chocolate”?

KRyanObviously, the Romans didn’t know anything about chocolate, since they had no access to any of the places cacao grew naturally. By the time Europe did learn of its existence, even ecclesiastical Latin was past its heyday. Nonetheless, Google Translate infamously offers scelerisque, more properly ...

2
Q: Can I use a vintage derailleur adapter claw on a modern derailleur

duhnlicI am restomoding a vintage Hi-C branded Schwinn road bike. There is no derailleur hanger on the drop outs so I am in need of an adapter claw. Can I remove this claw from the old derailleur or is the spring inside riveted and not threaded? Thanks in advance

CS
CS
01:47
1
Q: What capacitance values ​do you recommend for decoupling capacitors in battery-powered circuits?

WalterPHBasically I have two questions related to decoupling capacitors: In the circuit of the image you can see a simplified representation of a decoupling capacitor in parallel with a power supply, but how can I calculate the initial current to charge the capacitor? Theoretically I_ch should have a ...

1
Q: What has meta-philosophy to say about the (presumably) philosophical work of non professional philosophers?

eireneThis question is prompted by an interesting comment discussion in a question I previously asked. Whereas nobody without proper mathematical training would attempt nowadays to do mathematics, it seems that many academics (not necessarily philosophers) venture to write about philosophy, such as Ste...

TeX
TeX
2
Q: Clash between mismath's \C and babel with russian

murrayThe following MWE shows that the definition \mm@macro{C}{\ensuremath{\mathset{C}}\xspace} from line 267 of mismath.sty [2023/02/24 v2.5] — \mm@macro{C}{\ensuremath{\mathset{C}}\xspace} — causes an error when paired with loading babel [2023/02/13 3.86]with option russian [russianb.ldf 2021/01/10...

02:04
4
Q: Draw Parcly Taxel's cutie mark

Parcly TaxelI've been a fan of My Little Pony: Friendship Is Magic for a long time, and very early on I created a pony version of myself also called Parcly Taxel (warning: may be too cute to look at). The symbol below is her "cutie mark", which you will be drawing here: Construction All key points of the cu...

1
Q: Credit for mitzvot in vacuous situations

Craig FeinsteinA man fulfills the negative mitzvah of not having relations with his sister perfectly - he never even thinks about doing it. This is because he has no sister. Does he get credit for this? I would think not, since there is no effort involved in refraining from performing the action. But there is n...

02:38
4
Q: Story Identification: Nanomachines Building Cities

automatonLooking for the title of a book in which nanomachines create city buildings, skyscrapers, and the like. But there was a virus that hit the nanomachines, and at some point they started creating buildings that were more like... abstract art, I guess? Many of which weren't conducive for people to ac...

CS
CS
3
Q: Projective representations of the Lorentz group can't occur in QFT! What's wrong with my argument?

nodumbquestionsIn flat-space QFT, consider a spinor operator $\phi_i$, taken to lie at the origin. Given a Lorentz transformation $g$, we have $$\tag{1} U(g)^\dagger \phi_i U(g) = D_{ij}(g)\phi_j$$ where $D_{ij}$ is some spinor projective representation of $SO^+(3,1)$, and $U$ is an infinite-dimensional unitary...

1
Q: Integral with cosine in the denominator and undefined boundaries

GustafI am trying to solve the integral $$ \int_0^{\frac{3}{2}\pi}\frac{1}{\frac{5}{2}+\cos(2x)}dx $$ And I get the primitive function to be $$ \frac{2\arctan\left(\sqrt{\frac{7}{3}}\tan{x}\right)}{\sqrt{21}} $$ But $\tan(\frac{3}{2}\pi)$ is not defined. Mathematica gets the same primitive function...

RPG
RPG
6
Q: Zero Cost High-Level Snares

DanforthI am currently building a kobold alchemist with the Snarecrafter archetype. I’ll be taking the Snare Setter ancestry feat at level 1 which in turn grants the Snare Crafting feat. Snare Crafting reads as follows: You can use the Craft activity to create snares. When you select this feat, you add ...

02:54
5
Q: Why doesn't the federal government manage Sandia National Laboratories?

ChristianSandia National Laboratories has a budget of US$3.6 billion. On its website they write: Sandia National Laboratories is operated and managed by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc. National Technology and Engine...

1
Q: Wouldn't concatenating the result of two different hashing algorithms defeat all collisions?

EddieLet's say I have three messages: A B C And I run each of these through two different Hashing algorithms: MD5 and SHA1 for this example MD5(A) = X MD5(B) = Y MD5(C) = Y SHA1(A) = N SHA1(B) = N SHA1(C) = M Notice the MD5 hash of B and C collide. And the SHA hash of A and B collide. If I simply...

03:36
2
Q: Truce of the burning tree -- how realistic?

releseabeSeems to me that in real life we have situations where predators suspend attacks -- best example I can think of is the "Cleaning Station" in the ocean: wrasses clean larger fish and everyone queues up. Fish of different species cooperate to punish bad behavior. The Heraldic Tree is the only sourc...

2
Q: What's this gerundive doing here?

mike rodentMetamorphoses Book V, the story of Proserpina. At this point Proserpina's mother Ceres is still looking for her daughter. Sicaniam repetit, dumque omnia lustrat eundo,venit et ad Cyanen. ... "while everything she wanders over... by going (?)" Loeb offers this "she came back to Sicily, and in th...

Law
Law
2
Q: What can a lawyer do if the client wants him to be aquitted of everything despite serious evidence?

PMFAlex the accused has been charged with a series of crimes. The list of charges is long (beating up his wife, speeding while drunk, trafficking...) and for most crimes, the evidence presented by the state attorney is very strong. Dave the defense attorney, seeing the evidence, suggests his client ...

 
1 hour later…
04:52
2
Q: Why must a product of symmetric random variables be symmetric?

BlackKnightI was reading about weight initialization in neural networks (He et. al, 2015) when I came across this statement: "If we let $w_{l-1}$ have a symmetric distribution around zero and $b_{l} = 0$, then $y_{l-1}$ has zero mean and a symmetric distribution around zero." Where $y_{l-1}$ is given by $w_...

1
Q: Dot product of vector with camera's local positive x-axis?

SamI would like to detect if a cube is in the right half of the camera's view: I'm trying to do this with geometry nodes. Here's what I have so far: (Bottom half of this image) I normalize the cube's position, bring it to view-space and perform a dot product on it (with the camera's local x-axis?)...

Law
Law
1
Q: Is it safe to talk about ideas that have not patented yet over public email

azerilaI have an idea with which I may someday make a startup. I can talk about it with experienced people over public emails for example, however, I wonder if from patent point of view it is safe. My concern is from two separete perspectives: 1_For example publication can prevent a later patent if I un...

TeX
TeX
5
Q: Strange behavior of tikz-cd with remember picture

CarLaTeXWhile trying to answer a question, I found a strange behavior of TikZ-cd with remember picture. If I compile the following code more times, the distance between the first and the second TikZ-cd increases: \documentclass{article} \usepackage{amsmath, tikz-cd} \tikzset{every picture/.append style={...

CS
CS
05:14
1
Q: LEM current transducer 2.5 V internal reference

LuisI am testing a LEM LTSR-25-NP current transducer. According to the datasheet, the current transducer should be outputting 2.5 V +/- 0.025 V when the input current is 0 A, but this is not what I am experiencing. It seems that every time I set up the current transducer using a breadboard, jumper ca...

2
Q: Why does the impeller of torque converter sit behind the turbine?

Timothy Schereri saw this picture of Chrysler A-727 Torqueflite and it shows that impeller actually comes after the turbine. Why is it done like this? Doesnt it make more sense to put impeller before the turbine since engine rotates the impeller? Why go to the trouble of putting the impeller behind the turbine?

05:25
1
Q: How do I fit an e-hub motor axle that is too big?

TigertoneI am converting my wife's Giant aluminium frame bike to electric by fitting a rear hub motor. The problem that I have encountered is that the e hub motor axle is much bigger than the original wheel. I have succeeded seating the wheel in the forks but there's no side to side play in the wheel resu...

2
Q: Is this an exploitative offer?

Vitality7003I'm currently working at a company as a software engineer and I've been looking for internal job opportunities for personal growth and change of domain. I've heard news of a new role (first of its kind in the company) that might be introduced and showed my interest in it to the people in question...

CS
CS
05:40
4
Q: How does fire heat air?

katefull06I understand that fire heats its surroundings via conduction, convection and radiation. I've read that conduction is nearly irrelevant to this process as air is a poor heat conductor. In descriptions of convection, people often just say "fire heats the air and the air circulates heat to the envir...

06:00
3
Q: How does the NLT translate νόμος in Romans 8:2?

collen ndhlovuRomans 8:2 NLT For the power of the life-giving Spirit has freed you through Christ Jesus from the power of sin that leads to death. KJV Romans 8 : 2 For the law of the Spirit of life in Christ Jesus hath made me free from the law of sin and death. Romans 8:2 ESV For the law of the Spirit of...

DSP
DSP
1
Q: Frequency components in Bin averaging

S_holmesI am back with another question. Context for the question: I am trying to smooth out the angular velocity data from an encoder. The encoder has 720 ppr and the rough angular speed of the wheel is around 327 rpm (5.45 Hz). Thus, the maximum update rate of the encoder is around 4000 Hz (encoder giv...

2
Q: Is there a meaningful connection between the notion of minimal polynomial in Linear Algebra and in Field Theory?

AndrésI was wondering if there's a connection between the minimal polynomial of an endomorphism and the minimal polynomial of an element in a field extension. Maybe if, by considering an algebraic extention K(α)|K, there's a way of creating an endomorphism in K(α), viewed as a K-vector field, in such a...

TeX
TeX
06:20
2
Q: Add circled letters in titles

NicolasIn my course, I would like to specify the level of each sub-part using the levels indicated in circles. If I use the command \section{title} \trf , the circled letters appear below the title. If I place them in the \section{XX} command like \section{title \trf} , the document does not compile \do...

DIY
DIY
1
Q: Is there a proper earth ground point in this switch box?

Chuck CarlsonDuring humid, wet days, the phases of our house(two units) electrical system drift from another. Both phases go to each unit. One phase might be 90 volts while the other phase is 130 volts. After a visit from the power company, it was determined we did not have a good earth ground. I've pounde...

1
Q: Signal is not recognized as being declared in the current scope in Godot 3.5

senSMEM8I'm learning to use the Godot Engine (v3.5) along with the GDScript. I'm following the official tutorial for the same. In the step-by-step tutorial for the "Dodge the Creeps" game, there is a section on using a signal to identify a hit. Based on the above I have the following code: extends Area2D...

3
Q: How to derive the state of a qubit after a partial measurement?

StéphaneI am trying to solve a problem from the course "Quantum Information Science I" of MIT Open Learning Library, but I get stuck. Here is the problem. Consider the below circuit where the meter sign denotes the measurement with $\{|0\rangle,|1\rangle\}$ basis. Suppose $\psi_i=a|0⟩+b|1⟩$ and $𝑈=𝑋$...

1
Q: Parent based Selectable Entries Condition

Mike NilandIn the Craft CMS admin, I have an entries field on a page, and I want to limit the selectable entries available to only the child pages of the current entry. To achieve this, I set the Selectable Entries Condition in the field's settings to only allow entries to be selected if they match the foll...

3
Q: Lots of pick movement

oregonduckmanI have always had trouble controlling pick movement while strumming. Gripping tighter on a pick causes tension in my playing and I am wondering if anyone has some tips for me? Picks have always felt slippery to me even the ones that have rubber tops.

06:39
2
Q: What is the purpose of this D-shaped ring at the base of the tongue on my hiking boots?

pacoverflowMy hiking boots have a D-shaped ring at the base of the tongue. What is the purpose of this? I don't think the purpose is to allow you to hang the boot on a hook or something, because there is a bigger strap on the back of the boot that would allow you to do that. Or is the D-shaped ring purely...

06:54
1
Q: Does Shor's algorithm imply the existence of the multiverse?

Maxime DesalleIn The Fabric of Reality, David Deutsch argues the following: To those who still cling to a single-universe world-view, I issue this challenge: explain how Shor's algorithm works. I do not merely mean predict that it will work, which is merely a matter of solving a few uncontroversial equations....

07:51
2
Q: How can I think of counterexamples of abstract mathematical objects?

mohammedI noticed that I have an intuition for theory (ie making connections between theorems, lemmas, and proving related statements). However, when a problem gives me the choice between proving or finding counter examples, I immediately get lost. I have no idea how to begin creating concrete mathematic...

08:07
1
Q: How to get the closed form solution from DSolve[]?

profPlumHi I've noticed something rather annoying which is when I try to use this function DSolve to check the answers to my homework problems it will simply not show a solution due to lazy evaluation. E.g.: DE = D[u[x, t], {t, 2}] == D[u[x, t], {x, 2}] BC1 = u[0, t] == 0 BC2 = u[1, t] == 0 IC1 = u[x, 0]...

CS
CS
1
Q: Is a hot staple gun good enough for interior switch repair?

MeltingDogThe indicator stalk on my '88 Accord snapped at the base. For the life of me I cannot find a RHD replacement. I've tried all sorts of different glues and adhesives to try and fix it but since the crack is a leverage point it always ends up breaking again. Yesterday I stumbled across hot staple gu...

1
Q: If you order a special airline meal (e.g. vegan) just for fun, does this inconvenience the caterers and staff?

unforgettableidSupportsMonicaBackground information Some people are vegan. So, when they book a long-haul flight with free meal service, they'll request special meals which are vegan. This is fine. Some other people eat meat every day. But they want to try some vegan airline food, to see if they like it. So, when they bo...

3
Q: Is Hahn-Banach equivalent to the ultrafilter lemma in ZF

El RuñoI know that the ultrafilter lemma is weaker than the axiom of choice (in ZF) And that in order to prove Choice in ZF from the ultrafilter lemma we need the Krein-Milman theorem so $UF+KM=AC$ Furthermore, I know the Hahn-Banach theorem is weaker than choice but in order to get choice from the Hahn...

08:33
1
Q: Bug in integrate in in 13.1.0?

Yaroslav BulatovI'm trying the following locally (13.1.0 for Mac) and getting incorrect result Quit[]; Integrate[1/(x + 1)^2 Exp[-t 1/(x + 1)^2], {x, 0, \[Infinity]}] /. t -> 3. (* 0.0575796 *) This answer is wrong. I get the correct answer 0.504344 when running same expression on Wolfram Cloud (13.2.0). Is ...

08:47
2
Q: Mini project #1: Weight Converter

UnchartedThe goal of this program is to convert the given weight of the user LBS or KG into the opposite of what they used ex: 180lbs will convert to kg Weight = float(input("Enter your weight: ")) Weight_Metric = input("Type L/l for LBS and K/k for KG: ") if Weight_Metric == "L" or Weight_Metric == "l":...

1
Q: Research team didn't take internship announcement well

studentI'm a first-year MS student working as a part-time student researcher in a lab. Earlier this year, I received and accepted an internship offer as it was my top choice and my goal is to work in the industry. However, when I told my research manager about this during a meeting, it was not taken wel...

CS
CS
09:05
2
Q: How can I make this regulator output 2.8 V or 1.5 V?

Cem Pamir BanaI looked at an LM317AG-TN3-R which functions as a regulator. I'm trying to make sense of this part of the datasheet: I don't quite understand how I can now get 2.8 V and 1.5 V respectively. How do I use the given equation?

1
Q: How do you get out of a corner when plotting yourself into a corner

SayamanWhen you write a plot that becomes so convoluted that it becomes impossible to resolve without resorting to contrived or unrealistic solutions, how do you write yourself out of a corner. For example, let's say I wrote a mystery story with too many red herrings, how do you provide a satisfying res...

Law
Law
09:44
2
Q: Limits on right to demand a jury?

Michael HallSection 21 of the Washington State Constitution states: The right of trial by jury shall remain inviolate, but the legislature may provide for a jury of any number less than twelve in courts not of record, and for a verdict by nine or more jurors in civil cases in any court of record, and for wa...

10:19
2
Q: Biodiversity through radiation

Just a little mischievousI was wanting to make a species on an alien planet that reproduce purely asexualy, and their star produces enough radiation to cause common mutations among the children to cause something similar to biodiversity. Would this be possible?

10:36
2
Q: Has China expressed the desire to claim Outer Manchuria recently?

Sayamanhttps://www.youtube.com/watch?v=Iibs7buNwxQ Has China expressed the desire to claim Outer Manchuria recently? Outstanding boundary issues between China and Russia were officially settled in the 1991 Sino–Soviet Border Agreement. Article 6 of the 2001 Sino–Russian Treaty of Friendship provides th...

10:59
2
Q: How to use Multiwfn software (for charge density and ELF analysis)?

SakI am interested to learn the use of multifwn software. I have windows OS. Mostly I am interested to see the charge density and ELF, particularly in non-atomic locations. Can anyone guide me, starting from installation as well as which flags are important, etc (may be screenshots will be helpful)?...

11:21
2
Q: Mini project #2: Guessing a number loop

Unchartedimport random random_number = random.randint(1, 15) guess = int(input("What do you think my number is? ")) tries = 1 while guess != random_number: tries = tries + 1 retry = int(input("You got it wrong you're welcome to try again: ")) if retry == random_number: print(f"You got...

11:58
2
Q: Find a vector in the null space of a large dense matrix, where elements in the matrix are not directly accessible

HANDSOMEJACKANDYI am working with Conjugate Gradient method to solve for $Ax = b$, where $A$ is an extremely large PSD and Singular matrix. I cannot directly access the elements of $A$, but I can compute $Av$ for any vector $v$. Now, I would like to solve for $Ax = 0$, which is effectively finding one vector in ...

12:33
2
Q: Negative Log inside Negative Log

esh3390Is there a name for a function which is like $f(x)=-\log(-\log(x))$ where $0<x<1$? Or, is there any name for this function $g(x)=x+\log(\frac{1}{x})$ where $0<x$? Exchanging $x=-\log k$ in $g(x)$ gives $f(k)$ and I would like to know about those functions any deeper, but I am having trouble searc...

2
Q: Hint with floors and ceiling proof

taycantsProve that $$\forall n \in \mathbb{Z},\left \lceil \frac{n-1}{2} \right\rceil = \left\lfloor \frac{n}{2} \right\rfloor$$ I decided to approach it by extending floor and ceiling definition and got $$ \frac{n-1}{2} \leq \left\lceil \frac{n-1}{2} \right\rceil = \left\lfloor \frac{n}{2} \right\rfloor...

4
Q: Drawing from a uniform distribution

user17670386Suppose I have an unlimited number of draws from a uniform distribution [0,1]. I want to keep on drawing until the sum of all my a values >=x (where 0<x<1). I want to find the probability that my score ends between x and 1 when trying to do this and when it does, the expected value of my score. O...

1
Q: Why are physically impossible and logically impossible concepts considered separate in terms of probability?

thinkingmanIt is considered self contradictory to say that a triangular square exists. This is because it’s a ridiculous concept. It is contradictory inherently. But why is postulating some hidden devil or angel or god controlling things in a hidden manner not considered equally ridiculous? How do we even k...

TeX
TeX
2
Q: Incomplete \ifodd; all text was ignored after line

Eduardo JiménezI'm having lots of trouble when using \ifodd. I want to make a pattern of alternating thick and thin lines, I have tried several ways but none of them works. With this structure \documentclass{standalone} \usepackage{tikz} \usetikzlibrary{positioning,calc} \begin{document} \begin{tikzpicture}[r...

12:53
12
Q: Do roots of these polynomials approach the negative of the Euler-Mascheroni constant?

James ProppLet $p_n$ be the $n$th degree polynomial that sends $\frac{k(k-1)}{2}$ to $\frac{k(k+1)}{2}$ for $k=1,2,...,n+1$. E.g., $p_2(x) = (6+13x -x^2)/6$ is the unique quadratic polynomial $p(x)$ satisfying $p(0) = 1$, $p(1) = 3$, and $p(3) = 6$. Then it appears that $p_n(x)-x$ always has precisely one n...

13:13
2
Q: Did any DOS compatibility layers exist for any UNIX-like systems before DOS started to become outmoded?

ArrayBolt3Quoting from Jim Hall's "FreeDOS turns 25 years old: An origin story": Around 1994, Microsoft announced that its next planned version of Windows would do away with MS-DOS. But I liked DOS. Even though I had started migrating to Linux, I still booted into MS-DOS to run applications that Linux did...

 
1 hour later…
14:15
4
Q: How can I show that this set has measure 0?

KookieThe Problem Suppose I have the measurable set $$E = \bigcup_{n = 1}^\infty\bigcap_{k = n}^\infty E_k$$ where $E_k \subseteq \mathbb{R}^d$ is measurable for all $k$. I want to prove that if $\sum_{k = 1}^\infty m(E_k) < \infty$ then $m(E) = 0$. What I tried I think it can be shown that $$E = \bigc...

6
Q: Functional programming pattern for performing a function once after fold/reduce?

Adam B.I'm new to functional programming and was wondering if there is any kind of formal pattern/data type where 1) we fold/reduce with a monoid, 2) run a function once to get some summary out of the reduced value. For example, to get the mean of an array, we could reduce into a [count, sum] tuple and ...

DIY
DIY
14:31
2
Q: Smaller ground okay for 240v EV charger?

Ron CFriend has 50a circuit no longer used 6/2 NM with smaller ground. He plans to extend with either same wire type or use 8awg THHN in conduit for garage section. Is it ok to use smaller awg ground ?

CS
CS
15:04
2
Q: Is this the correct way of making a non-inverting optocoupler?

Kenny Thum Requires to read 24 V input signal, and output to an Arduino as 1, at the same time it lights up the LED indicator. Is this circuit viable?

1
Q: Why doesn't my passport show if a foreign country has banned me?

user610620I went to the passport office of my (highly developed Western) country and they said they wouldn't know if a foreign country I had previously overstayed in had banned me or not just by scanning my passport. Isn't that the point of passports? To contain data and violations on each traveler, and th...

15:22
1
Q: Is it possible to renew certificates for local environment using SIF or CLI?

Peter ProcházkaAs my self-signed certificates for Sitecore 10.0 instance expired, I want to use SIF or CLI to renew them and best also to replace thumbprints to minimize manual work. Is this possible with SIF or CLI? Or is there any ps1 script I could use?

2
Q: Two Doors and a Guard

Ichthys KingWhile trekking through the swamp of Knights and Knaves, you come upon a pair of doorways: One leading out of the swamp, the other leading to your doom. The swamp of Knights and Knaves is a strange place, where everyone either always lies or always tells truth. Before the doorways is a great two-h...

5
Q: Naive probability question (function of two random variables)

EE18I am trying to answer the following question from my quantum mechanics textbook and my probability theory is admittedly rusty (this is not schoolwork as should be clear from my post history on Phys and Math SE): The probability density for decay of a radioactive nucleus is $P(t) = \alpha e^{-t\a...

DBA
DBA
1
Q: Data retention in Mariadb

Cassandra ThriftI want to retain data for 90 days only for all 15 tables in my Mariadb database. Current db size is 60 GB. What are the options available for performing the same.

15:39
1
Q: Extract first word from txt file before ending with "/" sign in linux which contains "db" word in txt line

DivyankI have abc.txt file which contains two lines. I want to extract first word in line which contains db word in particular line. abc.txt: XYZ/db_abc.sql ijkl/tables/table_name/tl_abc.sql When I tried grep grep "db" abc.txt I am getting line which contains 'db' but I want to extract first word XYZ a...

16:00
2
Q: Repair MBR or GPT Table from recovery as both OSs fail to boot

Hum GurungOn my Mac Mini 2014 I tried to repair GPT table (MBR.. ?) with an answer given on Trying to rebuild my partition map (using GPT fdisk, SIP disabled) for my issue of Windows 10 not booting itself but by going through the Option menu on each boot. And, it's messed up now. I can't boot to any of the...

1
Q: How to rewrite sentences based on the SAGE Vancouver style citation?

Nima AghayanBased on the SAGE Vancouver style in line citations are superscript and should be after puncutations. Also no space is allowed between citations and words. How can I rewrite example this sentence correctly? In24, the researchers had to generate the synthetic training data manually via image ble...

ELL
ELL
16:21
1
Q: Is it correct to use "the" in this statment?

OsmiumWhich is correct or better? The materials used in making buildings are cement, bricks, sand, plaster of Paris. Some materials used in making buildings are cement, bricks, sand, plaster of Paris. Is the usage of "the" in the first statement correct?

16:32
1
Q: Which cam used as PoV?

mouezaOn Blender 3.3 I open my file where Ctl-0 has been made on one of my 2 cameras, very narrow shift so visual no difference. But when I open my file, no camera is selected. How can I know, on which camera has been made Ctl-0 Point Of View (but without visual way) ?

2
Q: What do ‘All things delivered to Jesus by His Father’ include?

Tesfaye WoldeMatthew 11:27:- All things have been delivered to Me by My Father, and no one knows the Son except the Father. Nor does anyone know the Father except the Son, and the one to whom the Son wills to reveal Him.

CS
CS
2
Q: Will this high-frequency PWM LED driver and MOSFET circuit work OK?

Seb WilsonI am taking a PWM input (0-12 V) from a TLC59711 (driven by SPI from a Raspberry Pi) and I want to drive a P-channel MOSFET. It is driving a 12 V, 40 W LED. I want to switch at high frequencies, as I want the LED not to flicker with any grade of camera. High definition cameras can shoot up to 100...

16:58
1
Q: How to UV unwrap for "real world" usage

Marc LI am designing a website for a friend who is a confectioner, specialising in wedding cakes. I would like to have a "cake" preview for his potential customers where they can upload an image and see how it would look like on one of his cakes. My object looks like this: However the "UV map" (print ...

3
Q: Is there any feasible way to avoid outing myself as transgender to prospective employers?

VikkiI'm planning to get back into actively job-searching in the somewhat-near future. I've thought of something that could potentially be a stumbling block, though; I'm a trans woman living in a not-too-big city in the Midwestern United States, and might potentially not want to immediately out mysel...

17:35
1
Q: Is this super-soldier possible in reality

darth mominWell, in my story both combat robots and super soldiers coexist alongside the actual armies, now the enhancements that super soldiers undergo can be divided into three main groups: surgical, biological and genetic. The improvements are applied in 3 rounds spaced in time and with a lost of trainin...

3
Q: Product of two polynomials is a polynomial with coefficients being zero for certain degrees

nkh99Let $k$ be a field and let $S\subseteq \mathbb{N}$ be an infinite subset. Let $f \in k[t]$ be a polynomial. Show that there exists a polynomial $g \in k[t]$ such that $f(t)g(t) = \sum_{i \geq 0}a_it^i$, where $a_i = 0$ for every $i \notin S$. Can we consider the quotient $\frac{k[t] }{(f)}$? Then...

4
Q: Nought and Crosses (tic-tac-toe) in C++

scriptaLearning coding with my daughter again. This is our first C++ program. I'm sure there's much that could be improved on. Any comments gratefully received. ttt.cpp #include <iostream> #include <cstdint> #include <limits> #include "Board.h" using std::cout, std::cin, std::numeric_limits, std::strea...

Law
Law
17:52
1
Q: Copyright issues when journal is defunct

IAPConsider a seminal paper published 40 years ago in a journal that went belly up 30 years ago. Many cite it but hardly anyone has seen it. Can I expect trouble if I make an electronic copy available on my blog?

CS
CS
18:29
2
Q: Does every element have a critical mass?

Derek SeabrookeWe have all heard of critical mass for radioactive materials like Uranium, Plutonium etc. but does every element theoretically have a critical mass? If not, what determines if such a phenomena is possible or not for a specific element?

18:53
5
Q: Knocking Out Zombies

Hi0401So basically we have zombies. And they are not just normal zombies... they are walking human corpses reanimated by slime molds growing around their bones! The zombies are moved around like puppets by the slime molds as they chase down, bite, and kill the living. (They track prey down using the re...

19:30
3
Q: Why is this sentence from The Great Gatsby grammatical?

rain soupreme There's a bird on the lawn that I think must be a nightingale come over on the Cunard or White Star Line. According to my very limited knowledge, shouldn’t it be "which came over" in place of "come over"? By this logic is it grammatical to say: "There’s a chicken come over on a plane"?

2
Q: Why was phoenician Melqart identified with Heracles?

eireneFrom the Wikipedia article on Melkart: To the Greeks and the Romans, who identified Melqart with Hercules, he was often distinguished as the Tyrian Hercules. What attributes did they share for this identification? Or was it instead a "random" identification?

19:44
6
Q: True Lies and Slumdog Millionaire

Jafe Across 1/4. He casts spells to assault marine mammal, having gained power (5,6) 8. Rose, who sings about Christ, is extremely antisocial (3) 10. The third of Tolkien's three works appears truly great, melts hearts (5) 11. Poor baby – small, unclothed (7) 12. Tolkienian dwarf visited by wizards f...

CS
CS
2
Q: Are the wavefunctions of electrons in conductors localised?

Seb StaiteIn my introductory condensed matter physics class, I learnt that the solutions to the time independent Schrodinger equation in a periodic potential are Bloch states. These wave functions are stationary states that have very high uncertainty in position - they are spread out over the whole crystal...

CS
CS
20:13
1
Q: Nexperia spice mosfet modell not working in LTspice

Anton IngemarsonHello I get errors with MOSFET spice models from Nexperia, I've tried to include the spice fil within the asc and as .include to the lib, the error is the same. I think it may be so that the spice syntax in the model is not correct for LTspice, lambda seem to be a real variable for LTspice so on ...

4
Q: The Empty Set and Cartesian Product (Problem from Velleman's book).

WhatAbouty*Note to moderators: The problem is a duplicate, but the question is not. I have some problems understanding the following problem from Velleman's book $-$ How to prove it, 3rd edition $-$ on introduction to proofs. More specifically, problem 15, from ch 4.1 (on Relations). The problem asks if th...

DBA
DBA
1
Q: Stats update during Index rebuild

udhayan dharmalingamI have a task in hand to move rebuild a big table to move LOB pages to a different filegroup on SQL Server 2017 Enterprise Edition. I was testing the scripts in a proof-of-concept environment, and I can see the total CREATE INDEX .. DROP_EXISTING=ON takes about ~ 6 hours. CREATE UNIQUE CLUSTERED ...

TeX
TeX
1
Q: LuaTeX glyph node: how to find out a ligatures's components

Daniel FlipoWith luatex glyph nodes representing a ligature have a components field of type node which is supposed to ``point to the ligature components''. I fail to understand how I can fetch the components using this link, any help would be much appreciated. For ``standard'' ligatures ff, fi, fl, ffi, ffl ...

20:49
1
Q: Prevent requests to 127.0.0.1 from being forwarded to http_proxy

StewartI have this on my machine: $ cat /etc/profile.d/proxy.sh export http_proxy=http://192.168.1.30:3128 export https_proxy=https://192.168.1.30:3128 That works great, until I need to use an HTTP interface with an application on the localhost. $ wget localhost --2023-03-02 06:54:52-- http://localho...

1
Q: Recovering from a blunder I made while emailing a professor

SaadiaYesterday I emailed a professor inquiring about a research opportunity. He replied within an hour, told me to follow his profile to find the open position, and that he would be pleased to receive my application as I was fit for the position. I followed his profile on LinkedIn and emailed him that...

3
Q: Canadian firm refuses to give me my T4 and R1 tax slips after promising to give it to me

SayamanCanadian firm refuses to give me my T4 and R1 tax slips after promising to give it to me. I worked for them for 3 years and left them a few months ago. What can I do in this situation? It seems like they're no longer even trying to respond to me. It's a disgrace, but I would like to know what I c...

GIS
GIS
21:08
1
Q: How to know if WMS GetLegendGraphic supports bounding box?

Lars EivindI am working on an application where users can input WMS layers, which is displayed on a map along with the respective legend graphic. Now, I want to display content specific legend graphics based on the bounding box of the map. I construct the parameters for the GetLegendGraphic on the fly, base...

1
Q: How many fields required for Lightning Message Channel?

blank paperHow many fields do we need to create in Message Channel in LWC to pass data to other LWC_component and can we pass array using using Lightning Message Service?

TeX
TeX
1
Q: how to draw the following text inside a rectangle in tikz?

tikzuserHere is my MWE: \documentclass{article} \usepackage{tikz} \begin{document} \begin{tikzpicture} \draw[blue!20!black,fill=blue!20,rounded corners=10,thick] (0,0) rectangle (3,1) node {text}; \end{tikzpicture} \end{document} I would like to have the word "text" centered inside the node. I tri...

21:34
4
Q: Amann and Escher's analysis and Pugh's RMA.

MooonyyyI started studying real analysis with Rudin's book, but it's really terse, i somehow made it through the first chapter (After reading 3 times :D) and solved some problems but here we are, i feel like i really didn't understand that chapter. So, i found two texts to study analysis and leave Rudin'...

22:05
7
Q: Follow Up: struct sockaddr storage initialization by network format-string

mortytheshortyThis is a follow up to: struct sockaddr_storage initialization by network format string First of all thanks to @Haris, @Toby Speight, @G. Sliepen and @chux - Reinstate for their help. I learned a lot and try to use it for future projects. I removed the Addr type for this code to keep it clean and...

2
Q: Non-ACGTN alternate alleles in VCF

MacintoshI was trying to left normalize my vcf file using following command: bcftools norm -f reference.fasta -m -any input.vcf > output.norm.vcf However this gives the following error: Non-ACGTN alternate allele at 1:278165 .. VCF:'-3AGG' It looks like the variant caller returned all deletions and insert...

10
Q: Largest Binary Area

mousetailTake the sequence of all natural numbers in binary, (1, 10, 11, ..) then write them vertically beside each-other like this (least significant bit on top; 0s have been replaced with spaces): 1 1 1 1 1 1 1 1 1 11 11 11 11 1111 1111 11111111 11 Notice there are areas...

4
Q: The region and polygon don't match. Is it a bug?

hanaIs this a bug? The region and polygon don't match. How can I fix this? I would prefer to continue using "Implicit", as it is related to one of my previous threads here. polygon = Polygon@{{0, 1}, {1, 1}, {5, 5}, {5, 0}, {0, 0}}; region = RegionConvert[polygon, "Implicit"]; {Graphics@polygon, Reg...

22:24
1
Q: ESTA still valid but new passport. can I ask for a new esta?

ValI'm an italian citizen, with a still valid ESTA. Anyway in the meantime I got a new passport, so I will have to ask for a new ESTA. Before doing anything wrong, I would like to know if I should do something with the old ESTA (like communicate to the embassy that it should be canceled) or I simply...

1
Q: Why does the word "experience" have a different initial vowel from that in "expert" and "expertise"?

Šāhbandar BandūraIn American English, the pronunciation of the words "experience", "expert", and "expertise" can be transcribed as /ɪkˈspɪr.i.əns/, /ˈɛk.spɚt/, /ˌɛk.spɚˈtiːz/ respectively. Can one identify a synchronic linguistic reason or a historical one for the different initial vowel in these words (/ɪ/ versu...

TeX
TeX
1
Q: Larger left margin on one page. Larger right margin on the other page

Zoltan KingHow can I set the margin in such a way that one page has a larger margin on the left side and the other one a larger margin on the right side? Update: I'm using the article document class.

22:48
7
Q: Short story taking place on a toroidal planet or moon involving flying

Wandering LogicI'm looking for a short story that I remember reading, probably in Asimov's (but perhaps in Analog or F&SF), probably in the mid 1990s (unlikely to have been before 1985, or later than 2000). The main features I remember of the story was that it took place on a toroidal planet or moon, and involv...

Vi
Vi
1
Q: Open the same file in two vertical splits: one editable, the other one not

MafsiI need to refactor some paragraphs from an article. I would like to have: One split with the original version (not editable) Another split with the document to edit Is it possible?

1
Q: Help me learn Phil of language and logic?

AnaamikaMy crush is a huge Phil nerd doing his phd and I want to impress him. I myself have a degree in Phil but I am not that good with it. I tried self teaching Phil of language, logic, modal logic (which are his fav topics) but I am lost as a headless chicken. Can anyone help me please? I have a full ...

4
Q: Why will Artemis II not orbit the Moon?

Andykins The Artemis II mission will loiter in an elliptical, high-Earth orbit before the Orion uses its own propulsion to complete the trans lunar injection (tli), thus using the fuel it might’ve otherwise used to insert itself into lunar orbit. A traditional mission would use the launch vehicles upper ...

TeX
TeX
23:03
2
Q: \boldsymbol not working with fontsetup package

user20478285How can I get \boldsymbol to work when using the fontsetup package? LuaLaTeX without \usepackage{fontsetup} but with \usepackage{amsmath}: LuaLaTeX with \usepackage{fontsetup}: I'm using the following code: \documentclass{article} \usepackage{fontsetup} \begin{document} $x$ and $\boldsym...

CS
CS
23:15
4
Q: Is the four-velocity always normalized?

10BlackHoleIn the book i have reading defines the four-velocity like $$U^\mu=dx^\mu/d\tau.$$ The metric used is $\eta_{\mu\nu}=diag(-1,1,1,1)$. It is straightforward to show that the norm of the four-velocity is normalized, $$\eta_{\mu\nu}U^\mu U^\nu=\eta_{\mu\nu}\frac{dx^\mu}{d\tau}\frac{dx^\nu}{d\tau}=-c^...

2
Q: Create .step list based on another parameter

pfabriProblem: I'm trying to create a .step list of values based on another parameter but none of the syntax I've tried seems to work. Example: In the voltage divider below, I'd like to step the values of R2 in multiples (1x, 1.5x, 2x) of R1. I can do this manually for a given R1 but I'd like to be abl...

3
Q: How to tell if a polynomial is square

Ian Gershon TeixeiraLet $ q \in \mathbb{Z}[x_1,\dots,x_n] $ be a polynomial. Is there a good way to determine if $$ q=p^2 $$ for some polynomial $ p $? The first thing that comes to mind is that if $ q=p^2 $ then $$ \frac{\partial q}{\partial x_i}=2p \frac{\partial p}{\partial x_i} $$ So $ p $ should be a factor of ...

TeX
TeX
23:29
2
Q: Printing acronyms not in italics

ZuyWhen defining an acronym, I define its long version in italics because I want it to be written out in italics in the actual text. However, when I print the acronyms in the acronyms table in the very beginning of the document, I want the long version to be non-italic. How can I do it? \documentcla...


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