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00:14
1
Q: A word that defines when you have to consider multiple factors when making decisions

BrettSay you have a situation where you are trying to mitigate multiple factors from competing sides, but when you make decisions you have to consider both sides, you can't just consider one side as it may have a worse outcome on the other side. So for example, say you were stuck on a deserted island ...

1
Q: Does fuel go bad after some time?

Prashant KumarI have my bike (bought in mid-2019) sitting idle for over a year due to covid, as I went back to my hometown and left my bike in my office parking. Before leaving I refueled by bike with premium fuel all the way to the top to stop any rusting in the tank. I had a talk with a few people and they t...

DBA
DBA
00:36
1
Q: Read-only transaction anomaly

MaxI've learned about this anomaly from these papers: https://www.cs.umb.edu/~poneil/ROAnom.pdf (original) https://johann.schleier-smith.com/blog/2016/01/06/analyzing-a-read-only-transaction-anomaly-under-snapshot-isolation.html (short and easy explanation) Can somebody please explain why is this co...

TeX
TeX
00:51
3
Q: Why are the packages expl3 and xparse not marked as loaded with recent LaTeX 2ε-kernels?

Ulrich DiezWith recent LaTeX 2ε-kernels things of expl3 and xparse are available by default. Why are the packages expl3 and xparse not marked as loaded with recent LaTeX 2ε-kernels? With the example \makeatletter \message{^^J} \message{xparse\@ifpackageloaded{xparse}{}{ not} loaded.^^J} \message{expl3\@ifp...

01:02
7
Q: Closed formula for a certain infinite series

T. AmdeberhanI came across this problem while doing some simplifications. So, I like to ask QUESTION. Is there a closed formula for the evaluation of this series? $$\sum_{(a,b)=1}\frac{\cos\left(\frac{a}b\right)}{a^2b^2}$$ where the sum runs over all pairs of positive integers that are relatively prime.

01:13
3
Q: How to install Cozy Audiobook Player in Ubuntu 20.04 without Flatpak?

yaa__I want to create a .deb file for Cozy (https://github.com/geigi/cozy) from its github repository. How do I make it? Don't want to use the flathub version. I'm on Ubuntu 20.04.

2
Q: "Move" focus in preprocessing

DadahuI have this photo which I am happy with. And I would not be able to find puffins everyday so difficult to reshoot the image. The focus of the bird is on its tail and not the eye. Is it a way to "move" the focus in preprosessing, or at least make it less obvious that the focus is on the tail.

01:31
8
Q: Parsing "quae cum audisset"

JoshI'm having trouble parsing the phrase "quae cum audisset," which I've seen translated as "when [subject] heard" or "and when [subject] heard" in the latin vulgate. For instance, Joshua 11:1, 2 Kings 19:1, and Esther 4:1. Here is Joshua 11:1 for discussion: Quae cum audisset Jabin rex Asor, misit...

2
Q: How to illustrate user friendliness in an icon?

hellogoodnightI am building a web page for a software company, where I want to inform the visitor that our systems are user friendly, among other things. I would like an icon to go with that text. Do you have any idea what that icon would look like? My first thought was a checkmark or a smiley, but they both f...

5
Q: What is 5 ℉ minus 5 ℉?

BrentIs it 0 ℉ or is it 0 K (Kelvin)? From an arithmetic standpoint, it seems like it should be 0 ℉, but that seems inconsistent because the result represents a delta (0 Δ℉ perhaps) which is conceptually completely different. Doing math with units like ℉/s completely breaks down. From a natural scienc...

3
Q: What potential Shuttle partner did this blue-and-white flag indicate?

AndrewThis publicity slide from NASA in 1972 (?), explaining how wonderfully useful and flexible the Space Shuttle would be, has an intriguing image in the lower right. (NASA MH72-5017, via David Portree) The "international" use is illustrated with a globe showing the US flag, the UK flag, and then a ...

01:52
6
Q: Fourier cosine transform from Erdélyi's Tables of Integral Transforms

StratumI’d like confirmation that $$ \frac{\cos⁡(b \sqrt{a^2+x^2})}{(a^2+x^2)^{3/2}} $$ has the Fourier cosine transform $$ \frac{\pi}{2 a} \, \exp(-ay) \qquad \text{if $y>a$,} $$ as found in Tables of Integral Transforms by Erdelyi et al. equation (35) in Sect. 1.7. I am puzzled that it is independent ...

2
Q: Scaling dataset in Random Forest

Subrata MukherjeeScaling a dataset for Random Forest modelling is not necessary. However, if we have already done the scaling and normalization to the dataset, will it impact our Random Forest modelling?

CS
CS
4
Q: Why is a signal that is finite in time domain, infinite in its frequency domain?

JustLearning321Why does every single band-limited signal in frequency have an infinite time domain and vice versa (As it's a symmetric relation, inf in one is finite in the other). I understand how a digital signal with an infinite slope needs infinite amount of sine waves to approximate or achieve, hence it be...

02:23
1
Q: Selecting a random number from finite set

Eerik Sven PuudistLet there be a set $S$ of natural numbers from zero to $n$ so that $S = \{s \mid s \le n\}, n \in \mathbb{N}, S \subset \mathbb{N}$. With each turn we pick a random number from the set. If we get one specific number (let's say $0$), the experiment is complete. If we get any other number, we go on...

02:41
2
Q: On planar sections of 3D convex bodies

Nandakumar RDefinitions: Diameter of a planar convex region is the greatest distance between any pair of points in the region. Width of a convex region is the least distance between a pair of parallel lines that just touch it. Consider the space of planar sections of any given convex 3D body. Consider the se...

5
Q: Why salesforce lightning experience is ironically sluggish?

Dev PatelWhy lightning experience is ironically sluggish? The classic experience comparatively feels faster when it comes to page load time and navigation. Have seen may developers and admins prefer classic experience unless we are developing or testing lighting experience specific functionality. In few e...

3
Q: Pressure inside a bubble of water

Christabel ElenyaWould the pressure on the inside of a bubble of water be the same as that on the inside of a drop of water of the same diameter and at the same temperature?

4
Q: Does movement of the earth bring difference in the distortion of fabric of spacetime?

Timsina AshokThe earth is constantly moving with huge velocity. Doesn't this tremendous velocity bring difference in distortion of spacetime at the opposite ends? I mean the end towards the direction of motion and the end opposite to it? Edit : Taking the resultant of motion around Sun and galactic center as ...

03:28
1
Q: What does "来" mean in "如果你不按照安全手续来的话,你可能会受伤的。"?

Joseph KingWhat does "来" mean in "如果你不按照安全手续来的话,你可能会受伤的. I usually have some sort of idea with these things, even when I'm wrong. But with this, I have no clue at all. Thanks so much!!! This is a great resource!!!

RPG
RPG
1
Q: Can you stack AC bonuses with an Artificer's Infusions?

Jhyarelle SilverCan you stack AC bonuses with an Artificer's Infusions? I get that you can't use the same Infusion on multiple items. However... does the Enhance Defense Infusion and Repulsion Shield Infusion stack in AC bonuses. Enhance Defense Infusion +1 AC (+2 at Lv10) Repulsion Shield Infusion +1 AC (Knock...

03:54
1
Q: How do you estimate the gas cost to deploy a smart contract with Ethers.js?

Adrian D.I want to know how much gas it would cost to deploy my smart contract using Ethers.js. I know how to estimate it for a transaction with contract.estimateGas.functionName(), but I can't seem to figure out how to do it for a smart contract. Please help. Thank you!

04:20
2
Q: Non-empty closed subsets with empty special fiber

JohnKLet $R$ be a dvr and $U\to \text{Spec}(R)$ an affine smooth $R$-scheme with non-empty special fiber $U_0$. Let $Z\subset U$ be a closed subset. Assume the intersection of $Z$ with $U_0$ is empty. Is $Z$ empty? If $U\to \text{Spec}(R)$ was proper then the answer would be yes because the image of...

1
Q: Shortening quarantine on arrival in Germany

PaulCurrently passengers arriving to Germany from high risk areas have to self-isolate for 10 days (source). 

However, there is a way to shorten that: The quarantine period may be ended on the basis of a negative test carried out no earlier than five days after entry. This seems logistically iffy,...

2
Q: Totally disconnected space is T1

OriaI'm asked to prove that every totally disconnected topological space satisfies $T_1$ seperation axiom. my proof is this: fix $x\in X$. now, for each $y\in X\setminus\{x\} $ we know that $\left\{ x,y\right\}$ is not connected, therefore there are non-empty disjoint open sets in $X$, say $U,V_{y}$ ...

04:42
3
Q: Why are these sentences involving 一部, 一部分, and 部分 ungrammatical?

MegaZeroXI've been trying to figure out the differences between 一部, 一部分, and 部分 using GOO's thesaurus. It indicates that 部分 is used for one of several parts, while 一部 and 一部分 are for parts of a whole. And then it seems to indicate that while 一部 and 一部分 are the same, that 一部分 is just a bit more formal. Thi...

04:57
2
Q: Bitcoin difficulty - why leading 0s?

septerrI do a sort of bitcoin 101 presentation for folks where I work. In one of the recent sessions, someone asked why the proof of work difficulty requires a minimum number of leading 0s. Why not 1s or something else? Not understanding the math behind it in-depth, the best answer I can come up with is...

05:11
2
Q: Can resonance structures account for NMR spectroscopy chemical shifts?

ImJustKawaii I am unable to understand why the alpha carbon to the carbonyl group is of lower chemical shift compared to the beta carbon based on the effects of electronegativity and hybridisation. Since if electronegativity was a major factor, it would not explain why the beta carbon, which is further from ...

1
Q: PMD showing errors for one class, but not another class with the same issue

happyLionI just installed PMD and its pretty janky from my experience, for example I have two classes and it shows the "same name" error for one class but completely ignores it for the other class.... has anyone experienced this with PMD or do you recommend another tool for code analysis?

3
Q: If two more particles bond together to make a bigger particle, what happens to their wavefunctions?

zucculentCorrect me if I'm wrong, but when two or more particles become bonded together, the particle they make together can have its own wavefunction that behaves just like any other. This happens when you go from quarks to baryons, baryons to nuclei, nuclei to atoms, and atoms to molecules. We've gotten...

Law
Law
2
Q: Can the Federal government of the United States force all U.S. states to pass a mandatory vaccination mandate?

SayamanCan the Federal government of the United States force all U.S. states to pass a mandatory vaccination mandate? Or do the states have the ability to decide whatever they want to do regardless of what the Federal government wants them to do?

05:41
2
Q: Where should I use conformality here?

Red BananaI am stuck in the following problem: Given the Möbius transform $T(z)=\frac{z-9i}{z-i}$. Using conformality, compute and draw the image of the circle $x^2 +(y-2)^2=1$ using the fact that this circle is perpendicular to the imaginary axis. I think the point is to apply the Möbius transformation ...

4
Q: Addressing age, resume-gaps and non-related job experience in a research job interview

WilsonI spent 7 years after high school working in hospitality, customer service, and semi-skilled manual labor. I returned to school got a bachelor's and later a masters, and now work in a research lab. I do not include any of my pre-respecialization work experience on my resume or LinkedIn. I also d...

1
Q: What is meant by the ‘madness’ mentioned in Devarim 28:28?

Tom WDevarim 28:28: ‘Hashem will strike you with madness, blindness and dismay.’ (NJPS rendering) What is meant by madness here? Is it recommended that one rely on the modern discipline of psychiatry and its classification of ‘mental illnesses’ in order to know what this madness that the Torah refers ...

TeX
TeX
1
Q: How to make the table bigger in Latex

InTheSearchForKnowledgeI want to expand the size of the table to surpass the layout of the overall text, could you please tell me how to do it ? I mean, originally, it looks like this: And I want to make the table like this: Here is my code in Latex (in case you need it) \begin{table}[h!] \begin{center} \tiny \b...

06:13
4
Q: Using coolant as 3rd propellant

EduardoSRocket engines often have 2 propelants, one of which is used to cool the engine and after that the hot propellant is injected in the combustion chamber. Would make sense to have a third propellant more suitable for the cooling process? As an example, at high temperatures ammonia decomposes endoth...

3
Q: Can an object from a natural process escape earth gravitation?

KeitelDOGI'm no expert, but I once studied basic from advanced physics and understand gravity action/reaction escape velocity of 11.2 km/s from the earth surface escape velocity changing as the object go far away Karman line for space (100 km) What I want to know, can a natural object, from a natural pr...

06:35
1
Q: Would it be possible to create additional partitions (e.g. /home) on a Xubuntu 20.04 Live stick?

Adalbert HanßenRecently I made a live USB stick with Xubuntu 20.04.02 LTS with Startup media creator (this might be usb-creator-gtk). I tried to resize the partition after creating the stick in order to provide an additional data partition. But that was impossible: Although the capacity of the stick was 32 GB, ...

3
Q: How would a world with limited access to modern technology work?

Dawnstar watcherThe setting is a semi-modern fantasy world with pockets of population separated by huge expanses of wild land where monsters and other predatory creatures live, keeping civilization from expanding too much. They would have technology like modern metallurgy, steam engines and maybe electricity in ...

6
Q: Does ice have to be on both poles?

Dust howIf an Earth-like planet has ice, does the ice have to be on both poles? For example, could a planet have ice on its south pole but not on the north pole, year-round?

DIY
DIY
2
Q: Can I replace a 100A meter panel with a 200A meter panel **before** replacing the load center?

stmp945I want to upgrade my home's service from 100A to 200A. I have a new Siemens 200A meter / disconnect combo panel as well as a new Siemens 200A load center to replace the existing meter socket and 1960s GE TM2010E load center. The exterior meter panel and interior load center are separated only by ...

06:55
2
Q: One Dimensional Gaussian Integral involving a rational function

o0BlueBeast0oIn the process of solving this question Integral involving product of arctangent and Gaussian, I've come across the integral: $$ \int_0^b \frac{e^{-s^2}}{a^2 + s^2} d s . $$ This integral appears simple enough that I would expect something to be known about it. Does a closed-form solution exist i...

TeX
TeX
2
Q: Backend reasoning on font size in math mode

OOESCouplingThis is more of a philosophical question. I was looking for ways to increase the font size within math mode locally (eg. in only one equation/align environment) but the solutions I come across often just revert to text mode. I was wondering is there some structural reason in the TeX system that w...

CS
CS
07:25
2
Q: Does Satan tell the truth in Genesis 3:5?

SolomonDoes Satan tell the truth in Genesis 3:5 For God knows that when you eat from it your eyes will be opened, and you will be like God, knowing good and evil. But Jesus says he lies in John 8:44: You belong to your father, the devil, and you want to carry out your father’s desires. He was a murde...

5
Q: Could merfolk create pottery and other vessels for storage?

BoaHancockloverI've got a fantasy setting set in a world based on the ancient near east ca 500 B.C. In it there are merfolk who have contact and trade with local humans. The merfolk are physically more similar to Abe Sapien than Ariel, their upper bodies are also covered in scales, they are more piscine than ma...

08:14
2
Q: What is the *real* package name of Librevault

MartinJust installed Librevault file sharing program from Ubuntu Software and decided that I don't like it. Want to uninstall it completely. But dpkg --list does not find 'librevault". Does anyone know the real name of this invasive program?

2
Q: Can Fregean sense of proper names be described in terms of intension?

PwNzDustIf I am not wrong, the old Fregean distinction between sense and reference can be read in terms of a distinction between intension and extension: The star of the night and the star of the morning are descriptions that share the same extension in the actual world but differ in "sinn", in the sense...

1
Q: Is there a clearer version of Giuseppe Piazzi's complete set of observations for the discovery of Ceres?

JJJohnThe image below comes from the paper Giuseppe Piazzi and the Discovery of Ceres G . Foderà Serio, which is too blurry to read. Is there a clearer version of this table or digital tabular form like .csv or something?

08:31
4
Q: MIT-licensed data as part of android app

lanskeyI have developed an Android app with Kivy, which I'd like to publish in Google Play. Now, I'd like to use certain MIT-licensed data, which will ship as part of the app. Is it legal? As far as I understood, I need to include the copyright notice, but I do not understand how to do it. Is it enough ...

5
Q: Matrix exponential weirdness in WolframAlpha - it fails on diagonal matrices?

FShrikeSo Wikipedia says this, which makes sense: But Wolfram computed this: Is this a bug or am I just extremely tired?

09:03
2
Q: Mass-energy equivalence and conservation of momentum

Preston BeckerI do not have a background with relativity, so expect some faux pas in this question. Let's say I have a system of three balls moving through space. The three balls have a known total mass and a center of gravity with a known velocity, so we can calculate the the system's linear momentum. Now, le...

09:21
2
Q: How do I take apart a modern Silca Impero frame pump?

Mr73I have a new frame pump and I want to take it apart. All the way - down to the metal tubes. This is the top of the air chamber and I don't know how to proceed. There is no trim piece covering this and the top of the tube isn't threaded. How is this opened? It should be simple as the leather valve...

09:37
6
Q: Book about kids who were separated into houses and had to compete in some sort of survivalist game

PeterThe book was about kids who were separated into houses and had to compete in some sort of survivalist game. I think there were four houses; one I remember lasted on eating lots of bread, so they were never in shape. I think the houses were named after Greek mythology. I read it about 5-8 years ag...

2
Q: What is affecta modifying in this sentence from Fabulae Faciles?

Tyler DurdenIn the following sentence from Fabulae Faciles, I cannot figure out what affecta is modifying: Vix vestem induerat Glauce, cum dolorem gravem per omnia membra sensit, et paulo post crudeli cruciatu affecta e vita excessit. Affecta appears to be feminine. I would have expected it to be modifying...

RPG
RPG
10:05
5
Q: How can I give my Iron Man Artificer build sustained flight without wings?

decduck3I was trying to make myself Iron Man in D&D 5e. I selected the Armorer Artificer subclass and got Infiltrator armor for the lightning launchers. Now, I need a way to fly and I can't find a way to get sustained flight without wings. Any ideas? Edit: I am looking for a way to have permanent flight ...

2
Q: assigning random material color

vpoi am trying to script a basic grid of cubes with different colors for each cube. does each cube need its own “material” or can the diffuse color for a single material be changed for each cube? in any event, i’m not sure how to assign the materials or the colors. if someone could explain, i would ...

1
Q: RootReduce and Simplify for an algebraic expression

David G. StorkThe American Invitational Mathematics Exam (AIME) 2006 asked contestants to reduce this expression: $$\sqrt{104 \sqrt{6} + 468 \sqrt{10} + 144 \sqrt{15} + 2006}$$ The answer is $13 \sqrt{2} + 4 \sqrt{3} + 18 \sqrt{5}$, as can be verified by: Reduce[Sqrt[104 Sqrt[6] + 468 Sqrt[10] + 144 Sqrt[15] +...

Law
Law
10:22
1
Q: Could I get the money I paid to park back?

NoelUndertheBridgeHypothetical question. I was in Madison, Wisconsin last week. I parked in a municipal lot, paid at the automated kiosk, and got a receipt. When I returned, about 20 minutes before the end of the time that I had paid for, I found I had been ticketed for parking at an expired meter. The time st...

10:54
1
Q: Is it ethical to perform research on living people's ancestry without their knowledge?

Ryan MortensenAssuming you do not store, post, or record any information about a living person, is it ethical to use a living person other than yourself or your direct line as a kick-off point to begin research? The most common examples would probably be identifying a genetic match and researching them to find...

2
Q: Beam on top and beam at the bottom on a music sheet

seccpurI am new to sheet music. I am trying to recreate in Guitar Pro, corresponding to guitar strumming, the music sheet notation of the picture below. The timing is 4/4 and tempo is 120. I am unable to create or understand the meaning of a top and bottom beam together.

3
Q: Do the quark types differ from each other in ways other than charge and mass?

zucculentI've read things online here and there that seemed to hind that there's more to quark type than mass and charge. Is this true? For clarity's sake, I'm not asking about properties individual quarks have other than mass and charge. I'm asking about the properties of quark types.

11:52
2
Q: "Something does not depend on a particular coordinate system". What is the meaning of this sentence?

tchappy haI am reading "Calculus Metric Version 7th Edition International Edition" by James Stewart. On p.879, Stewart wrote as follows: “It is often useful to parametrize a curve with respect to arc length because arc length arises naturally from the shape of the curve and does not depend on a particular...

12:12
2
Q: Can chemical composition be determined from elemental composition?

Kevin SuI have the energy dispersive x-ray spectroscopy results from a sample of salt that I produced by collecting and processing ocean water by filtering, boiling, evaporating, and additional steps to try to reduce calcium and magnesium content in the final salt crystals: Atomic % 25.70 C car...

6
Q: PRMO Model Question : "The least LCM of 20 natural numbers, not necessarily different, whose sum is 413, is _________"

SpectreThis is a question I saw on a PRMO model paper conducted by an institution where I study (I mean, not my school, but an entrance coaching center) on August 1, 2021 as per the calendar here. I was initially dumbstruck on seeing the question. I have never tried playing with LCM's, but I somehow man...

3
Q: Why does the normal force do no work in the falling stick problem?

JELVI'm studying the next problem what I found in a book. A stick of length $l$ and mass $M$, initially upright on a frictionless table, starts falling. The problem is to find the speed of the center of mass as a function of the angle $\theta$ from the vertical. I have analyzed the solution using ene...

12:42
5
Q: Map from integral cohomology to real cohomology

D.LLet $X$ be a topological space. For each $k \in \mathbb{Z}$ we can consider the following map. $$ j_k : \mathrm{H}^k(X;\mathbb{Z}) \to \mathrm{H}^k(X;\mathbb{R}) \ ; \ [f]_{\mathbb{Z}} \mapsto [f]_{\mathbb{R}}. $$ (To reduce confusion, let us denote things in $\mathrm{H}^k(X;\mathbb{Z})$ by subsc...

13:07
4
Q: Grothendieck's Generic Freeness Lemma: Step in proof from Vakil's FOAG

user940160I'm trying to solve the following exercise (7.4.K) from Vakil's FOAG, which is a step in the proof of Grothendieck's Generic Freeness Lemma: Here's my attempt: We proceed by induction on $n$ to construct the compatible isomorphisms $\phi_n$ as in the exercise. We have an exact sequence $$0\to M_...

4
Q: How do you get over feeling like you're constantly making mistakes?

pua'ahorofenuaI graduated college in December and in March I was hired for my first professional job, as a Project Coordinator at a company that builds commercial kitchens in Arizona. By all accounts, I'm doing pretty well- I've gotten good feedback, I haven't had any major issues, I've even somehow becoming t...

13:31
1
Q: Pronoun implication about Logos in John 1:1-5

Al BrownPlease help track the pronouns and antecedents in John 1:1-5. In the Greek, do the “He” and the “him”’s that refer to the Logos in 1-4 definitively indicate personhood/agency, or could the antecedent possibly be an “it”? (Without reference to any greater context at the moment) What is the gender ...

1
Q: How could simple but cheap robots be used in combat?

OT-64 SKOTHow could simple but cheap robots be used in combat? These robots are capable of more than what we can do today but are still very simple compared to a lot of sci-fi. They can move across rough terrain relatively well but at a lower speed than a well trained soldier & on flat terrain a bit faster...

14:14
5
Q: Another crossword of mine

msh210 Across 1 Pa alternative 4 A friend of the hiders (2 words) 13 Some SE housekeeping 16 Jackie Harris, for one 17 An opera piece 18 Mrs. Perón 19 "The best man in the government" 20 Support garment 21 Parts of curves 22 Stop talking! (2 words) 23 Flanders and Swann subject 24 Den 26 Bobbies, for e...

CS
CS
14:26
3
Q: How can a Turing machine compare two strings without modifying them?

FrankIn Sipser's Introduction to the Theory of Computation, the author explains that two strings can be compared by “zigzagging” back and forth between them and “crossing off” one symbol at a time (i.e., replacing them with a symbol such as $x$). This process is displayed in the following figure (from...

14:41
3
Q: Does Phenylacetylene undergo side chain oxidation with hot alkaline Potassium permanganate?

MiaThis question was asked in my book: To my knowledge, side chain oxidation with KMnO4 occurs only when a benzylic hydrogen is present. However this doesn't contain a benzylic hydrogen and hence according to me it wouldn't give any reaction. However the answer in my book states that Phenylacetylen...

Law
Law
14:54
3
Q: Can I use a product that already exists to make another product?

KatieIn short, I want to start a small internet shop (think like Etsy) that sells an idea I have for a handmade item. Something I would need to make the item is hair dye, and I've done TONS of research and I can't find anywhere to buy ingredients for hair dye because the process of making hair dye is ...

GIS
GIS
15:08
3
Q: QGIS Plugin for Shortest Path with Multiple Stops

JoshI have been asked to find the shortest route from a particular start point to multiple properties along our shires road network. In QGIS I have tested the different network analysis tools and other plugins but I cannot find one that allows you to include multiple stops along a road network. I can...

CS
CS
15:40
0
Q: Best way to limit maximum DC current?

SebastianI am making a device that provides a maximum of 35 mA @12V DC for a skin care system through a wire. I have a 12 V DC supply capable of 120 watts. What is the safest and simplest way to limit the current through what is essentially a short across the 12 volt supply

15:52
2
Q: Movie clip is stabilized in preview, but not in render

AlexI have a movie which I want to stabilize. After I open the movie in the movie clip editor, insert the marker, track it, enable the stabilization 2D, and view the stabilized result the movie clip looks fine. After I go to Compositor and make a standard setup (Movie clip -> Stabilization -> Composi...

2
Q: Connectedness and cohomology of a scheme

trilobitaLet $Y \subseteq \mathbb{P}_k^n$ be a closed subscheme. Is there a simple criterion to see if it is connected? Is it enough to check whether $H^0(Y,\mathscr{O}_Y) \cong k$ or this does not work in this setting?

16:08
3
Q: How to deal with hordes of flies in outdoor toilets?

Matas VaitkeviciusIn countryside (rural) tourism, especially when it is single or few houses somewhere in the middle of nowhere (woods), instead of having a water system including proper bathroom one sometimes gets a well for water and a hole in the ground for a toilet. During summer it becomes a huge attraction t...

3
Q: What is "layering flavors"? What does it accomplish and how do i do it?

David DPGRecently i've been into cooking videos and tutorials and something that stands out to me is this concept of "layering flavors", that some chefs use when they add ingredients. Example: We're only sweating the onion, afterwards we'll add some garlic and that way we'll have a nice base layer to wor...

2
Q: Can Google Sycamore's benchmark for quantum supremacy be simulated on Qiskit?

MauricioIn 2019, Google claimed that they have achieved quantum supremacy/advantage with their 53 qubit quantum processor Sycamore. The paper is here. But I have not even been able to find what their algorithm is called. I know that is just a sampling problem. How would I go to create a similar sampling ...

GIS
GIS
1
Q: Combining display of points and polygons in QGIS

MortenSickelUsing QGIS 3.20, I am plotting a number of events with corresponding uncertainty ellipses, having one layer with the points and one layer with the ellipses (although both are stored in the same table in postgis). I would like to have this plotted with the newest data on the top. But if I put the ...

16:25
6
Q: Is it valid to overload function with extra non-deducible template parameter?

HoltThe following code compiles and works fine with gcc (9), clang (11) and msvc (16.28): template <class A> struct X { A a; constexpr X(A a) : a{a} { } }; template <class A> constexpr auto fn(X<A> const& x) { return X<A>(x.a - 1); } template <class Xs, class A> constexpr auto fn(X<A>...

16:50
2
Q: What is the theological significance of the label "Christian", according to evangelicals?

kutschkemRecently, I have noticed a trend here of people fighting to deny self-identifying Christians who deny parts of the Nicene creed the label Christian. I am of course talking about LDS and I guess the part that is denied is consubstantiality(??). Anyway, this question is not about whether or not LDS...

17:03
3
Q: Using masers to measure rotational velocity of a galaxy

PrallaxWhen measuring the rotation velocity of a galaxy, most of the times we can only directly measure radial velocity, by looking at the redshift. I read in a lecture slide that some times it is possible to measure the total velocity (not just radial) if the galaxy is in the local group and presents m...

17:19
1
Q: If my account only sells crypto, will I get taxed?

EugeneWill I get taxed if I do this? Purchase $1000 USDT on Binance Transfer to a crypto exchange outside the U.S., or transfer to a wallet address and use decentralized exchange. Buy bitcoin, earned $1000, sell for $2000. Transfer $2000 USDT to my wife or father's Coinbase account, cashout. Will I g...

CS
CS
17:44
2
Q: Unknown symbol in a Synth Pedal schematic ( Reversed E with connections)

Lance Arn I am in the process of designing a filter based upon the Korg CMP-1 / Yamaha CMP-1 Compressor Pedal, for use in my home built Analog Synthesizer. In the schematic, attached to the battery pos terminal is a symbol I am not farmiliar with, and I have been unable to find any reference to this symbo...

18:08
1
Q: Lubuntu 20.04: Can see but not connect to wifi (I can connect at friends house though)

mattbThe problem I have an issue connecting to the wifi on a fresh install of Lubuntu 20.04 on my lenovo laptop. I have a RTL8723BE PCIe Wireless Network Adapter. At my friends house I have no trouble connecting to their wifi. At my house, I can see all the networks (and mine has full signal strength)...

1
Q: Velocity and kinetic energy, violating galilean relativity

Matt TobiasI have a toy car and a battery. The barrery has a screen that shows how much energy it has left. Since kinetic energy is proportional to velocity squared, I need 1J of energy to go from 0m/s=>1m/s, but 3J of energy to go from 1m/s =>2m/s. So I can surely use this to tell what absolute reference f...

18:27
1
Q: Why does domus have masculine forms?

Tyler DurdenThe word domus is normally a feminine, IVth declension noun and hence the adjectives that modify it are feminine. However, sometimes domus appears to take masculine forms in some cases. For example, we have the "Comes Domorum" (the count of the houses), who was the official in charge of the imper...

TeX
TeX
3
Q: How can this complex command be broken down and explained for someone starting with Tex?

TheMindWithinI got this Tex command, as a solution to a different problem and it works. But I have trouble understanding the details of how it works since I'm not that proficient in Latex coding and I want to learn. %\DTLfetchifnull{<db name>}% % {<column1 name>}% % {<column1 value>...

18:47
1
Q: Betti numbers of non-singular minimal complex projective threefolds

xboxIf we consider non-singular minimal complex projective threefolds is there a computable bound on $b_3$ in terms of $b_1$ and $b_2$? Or on $b_2$ in terms of $b_1$ and $b_3$?

1
Q: "In the platform" or "on the platform"?

Polina ZakaryanI don't mean such platforms as Netflix, Youtube or social media platforms. If this is a marketing automation platform (in other words - software), can we say "in the platform"? In the HubSpot Marketing Automation platform, you can set up such automation workflows as a welcome email, abandoned ca...

2
Q: When it comes to commercial products, is there harm to choosing a more beautiful and well-designed option?

JuckixI am new to buddhism and this is my first question here. I hope I can provide something of value and that I am clear in my phrasing. So I have recently started learning about the teachings of the buddha, principally through the book The Basic Teachings of the Buddha by Glenn Wallis. I have decide...

1
Q: Creating an Index by summing percentiles

Maths12This is probably a basic concept but i want to understand if it makes sense mathematically. I want to create an index on how much somebody spends at grocery stores. So for each person I calculate the total spend per shopL e.g. Asda, Tesco, Morrisons. For these three I then calculate the percentil...

19:14
3
Q: Plot3D + WhenEvent + NDSolve

dtnGiven: $\begin{cases} \dot{x}=-x-By^2 \\ \dot{y}=Ax-y^3 \end{cases}$ where $x,y$ - variables; $A=[2;4],B=[0.2;2]$ - positive parameters; My task is to find the time $t_n$ of the first intersection of a variable with zero. I do this with code: pars = {A = 2, B = 1} {sol, points} = Reap@NDSolve...

3
Q: I can't boot Ubuntu anymore

BeaI have been using Ubuntu as my sole operating system on my Dell computer since 3 years. The battery pack of my computer is not working anymore, and in the past month my computer has been taken off the electric grid without closing down properly quite a number of times (I was staying with elderly ...

1
Q: Do we neglect Gravity to conserve momentum of colliding bodies?

CuriosityWhy do two bodies collide? What are the factors to be considered for collision? It is dependant on velocities of the colliding bodies if they do not have a sufficient velocity then they will perform a projectile motion and fall not colliding due to the presence of gravity. We say that momentum is...

CS
CS
2
Q: Relay protection circuit

JoeyI came across a relay circuit that uses two diodes and a capacitor. I know the diode across the coil (D1) is a flyback diode and that capacitor (C1) is a filter capacitor. What is diode D2 for?

1
Q: Is it possible to apply RSA on complex numbers?

hanugmRSA is a popular public-key cryptography algorithm. It has some mathematical assumptions. I mean, one cannot apply RSA on elements of any algebraic structure. Elements from certain algebraic structures are only eligible for utilization in RSA. I want to know whether complex numbers fall into thos...

19:36
1
Q: Is my approach to enqueue styles inefficient?

sabbir ahmedI'm kinda new to wordpress and programming in general. I have the following question. Recently I came across this article and wanted to use this approach in the wordpress theme I'm working on. I wrote this Enqueue class for enqueuing my styles and js to to the theme: <?php class Enqueue { pr...

ELL
ELL
1
Q: What is the subject of “With great power comes great responsibility.”?

Delfino With great power comes great responsibility. What is the subject of the sentence? Is “With great power” the subject? Could you please give me more sentences written in that grammar?

CS
CS
19:48
3
Q: Definition of power. (A level)

GeoffI came across a multiple choice A level past paper question asking to choose which of the following defined power: (C) $\text{force} \times \text{velocity}$ (D) $\text{work done} \div \text{time taken}$ The answer given was (D), but I am perplexed as to why (C) was not considered correct.

2
Q: Is it better to rent out the less equity I have?

Panda PajamaSuppose I have a property with a certain amount of equity, with the rest on a mortgage, and I want to know if I should sell it or rent it out. I can think of three scenarios. I'm not considering valuation, devaluation, taxes or fixed costs (closing, etc.) for simplicity. Scenario 1: I sell the pr...

2
Q: Interviewing for position looking to immediately hire. Would be nice to give current employer 2 weeks notice but just as a courtesy

stormcoffeecakebanjoI am interviewing for a job where they want someone to start "immediately". My current employer has not treated me well and does not know that I am looking for another job. I have worked for them for 6 months. Where I live it is customary to give 2 weeks notice, but certainly not a legal requirem...

20:36
2
Q: Did Minato give BEE his nickname?

Neil MeyerHas been stated officially that it was Minato who gave BEE the title of shinobi killer? I seem to want to think so.

20:46
1
Q: Reducing the amount of duplicated code (python) - cricket matches

Luke HansfordI'm a beginner and self taught and just want to see if there are neater ways of doing what I am doing, or whether there are bits of code that are poorly written. I think Lines 100-204 are the most crudely written. Below I've also determined who is bowling first and therefore assigning a dictionar...

3
Q: The meaning of 感到鸭力

mpasko256I am trying to understand, what is the true meaning of 感到鸭力 translated to English as to feel the duck power As I noticed, it is often used in memes along with images expressing that feeling. But only seeing the expression I cannot determine what it feels precisely. What is the duck power? Is it ...

2
Q: Do certain merchants in Gothic 3 actually pay increased money for certain items?

Baskakov_DmitriyOn the internet, people often claim that. For example, hunters buy hunting trophies for x2 price compared to other traders, and thieves pay more for jewelry. However, I was unable to confirm this: any items that I've tested turn out to have the same price when trading with Kliff, Sebastian, Marlo...

1
Q: Concentration Inequality for Bounding Lipschitz Empirical Lass

Joe_AffineLet $(\Omega,\mathcal{F},\mathbb{P})$ be a probability space, $(X_n:\Omega\rightarrow \mathbb{R}^m)_n$ be a sequence of i.i.d. random variables and let $L:\mathbb{R}^m\rightarrow [0,\infty)$ be Lipschitz. Let $\mu_n:=\frac1{n} \sum_{k=1}^n \delta_{X_k}$. Are there conditions under which: $$ \ma...

1
Q: What would you call an "almost-closed" roller shutter?

fraczWe are designing a user interface for the roller shutter users. The ones in question are exterior rollers. These have tiny holes between the slats. You can shut the roller with the holes visible (so some of the outside light still sneaks into the room), or close it fully, enabling you to feel as ...

5
Q: How should I repaint my Commodore PET?

EdwardI have an original Commodore PET from 1977, that I have recently electrically restored, but there are some rust spots on the case. It seems that I should at least do something to inhibit further rusting, and maybe even repaint it. If I repaint, I'm guessing it should be automotive paint, but do...

20:57
5
Q: What happens with the isogonic lines at the South Pole?

C CameriniWhile reading about sundials, I've seen maps depicting isogonic lines (those that connect points with the same magnetic declination values). Pray tell, what's happening in Antarctica? Why does it appear to have two South Poles? https://www.youtube.com/watch?v=j7LqqvTmnVM&ab_channel=SteveJBlack

1
Q: jq merge values of same key into an array?

tomaytotomatoI have a SQL resultset exported as JSON, in the form of 1:1 mappings in an array. e.g. [ { "subject": "Accounting", "level": "A Level" }, { "subject": "Accounting", "level": "IB" }, { "subject": "Accounting", "level": "University" }, { "subject": "Accounting

1
Q: How large would a solar panel array need to be in order to supply all the world's energy?

tomhThis story from 2016 claims that all the world's energy needs could be supplied by covering 1% of the Sahara in solar PV panels. Was (is?) this true, and if not, how would you go about approximating the size of solar PV array needed to supply the world's energy in 2021? According to the IAEA worl...

4
Q: How to avoid children when they are magically attracted to you?

Ichthys KingWhat steps could people take to avoid children who are attracted to them magically? The nature of the attraction is that it induces in the nearby (around a km^2) children an ability to sense the attractor's location, and a desire to seek the attractor out. This is the only effect. It cannot be bl...

21:14
1
Q: How do I scale something on a point

michaelI'm trying to scale something but I want a corner of it to stay still like I want to scale it from a single point/vertex. Here is an image since I can't explain it well.

CS
CS
21:27
1
Q: Question about assembly with DIP packages

electrophileI'm sending a board for assembly with a through-hole DIP-8 package with a standard horizontal lead spacing of 7.62mm. However, at their ends the pins are wide with a pin spacing of ~8.47mm. Should I modify my footprint to accommodate this wider width or leave the footprint at its default width of...

DIY
DIY
4
Q: What is this type of insulation?

Lenny CreviceI just bought a house and I find this stuff in the loft. I'm worried it is asbestos... Is it?

21:56
7
Q: Accused by the team of "stealing" my role from a colleague: all team members are against me

EdwigTwo months ago I was hired as a project and team manager in a multinational consultancy company. I have about 8 years of work experience, but only 6 months as a project manager (I worked before in marketing, HR and IT fields). I will try to explain my situation. Before I arrived, there were: the ...

22:12
1
Q: What are the characteristics required for a PhD thesis?

hanugmPhD days are important in ones life. They influence the research career as well as the academic career of a person to a great extent. In many cases it influences the personal life of a person to a large degree. The quality of a PhD, in general, is assessed or understood by the thesis submitted by...

11
Q: Can C++ struct static member variables shadow non type template parameters?

NoSenseEtAlmsvc compiles the following code(with /permissive- compiler switch), clang and gcc do not: template<auto val> struct S{ static constexpr auto val = val; }; int main() { return S<4>::val; } I presume that this is just a msvc bug, but I am curious if maybe standard is ambiguous here.

2
Q: What is the correct term for a "thesis statement" for individual body paragraphs?

VillageSuppose a paper is organized with a thesis statement found in the introduction paragraph. Then, each body paragraph contains examples and details that support the thesis statement. The first sentence in each of those body paragraphs though acts as a "mini thesis statement". Example: Cats make gre...

1
Q: About optimal staging and structure fractions

Joshua WooI have recently came across an assignment where I have to do optimal staging of rockets using Lagrange multipliers. I am suppose to optimize the mass of each stage of a well-known rocket(I chose Saturn v), by using their known values of their final speed, payload mass, specific impulses of each s...

22:34
2
Q: Restore found.000 files to their original location in Windows 10

miguel ramiresI have an external disk which has received some power cuts due to power failures in the office and not having power backup. The disk for now works correctly but I have noticed that there are some files with 0 bytes and other files which have been "lost". Reviewing the hidden files of the system I...

6
Q: Use variables in value of apex switch statement

RaulWhen using a variable in value of switch statement, I get an error: Error: Field must be an enum reference Apex code: static final String VALUE_ORANGES = 'Oranges'; String expr = 'Oranges'; switch on expr { when VALUE_ORANGES { System.debug('Oranges are $0.59 a pound.'); } w...

6
Q: if using while loops in bash is bad...what should I do, then?

gabtI guess this may be a naive question but I can't get my head around so I felt like asking... I was searching for some solution to a problem, when I found this very interesting post about why is using [while|for] loops in bash considered bad practice. There is a very good explanation in the post (...

CS
CS
1
Q: Correlation between (household) median income and Democratic vote share?

Number FileI have read that wealthier states tend to vote Democratic while poorer states tend to vote Republican. There is data that backs this up. What is the correlation between statewide median incomes and 2 party Democratic vote percentages?

TeX
TeX
2
Q: LaTeX custom section counter

GhostJumperIs it possible to recreate this numbering format in LaTeX?: 01. Text 0101. Text 01. Text 01. Text - Text - Text 02. Text - Text 02. Text 0102. Text 01. Text I cannot figure out how to...

DBA
DBA
22:53
2
Q: Query plan not reused for identical queries sp_executesql vs adhoc

guillaume31One of the queries in my application is timing out. With the SQL Server profiler I was able to get the exact faulty SQL code. It's an sp_executesql dynamic statement that runs in > 2 minutes in SSMS on the server. In contrast, running the same SQL ad hoc - outside of sp_executesql but still with ...

3
Q: Is "aliae alias in partes" an idiom of some kind?

Tyler DurdenIn Fabulae Faciles, section 82, I do not understand the expression "aliae alias in partes". Is this some kind of idiom? The phrase is: Postquam tamen pauca mīlia passuum ā lītore Trōiae prōgressī sunt, tanta tempestās subitō coörta est ut nūlla nāvium cursum tenēre posset, sed aliae alias in par...

2
Q: Search File A with Terms from File B and save output to individual TXT files based off search term from File B

jah6719FILE-A has 100,000 lines. FILE-B is 50 search terms. I'm looking to complete the search of FILE-A (CSV or TXT) with the various terms from FILE-B (CSV or TXT) .... AND (here is the kicker) Save the results in individual TXT files based off the search terms in FILE-B. Example: FILE-A 123 45678 ...

CS
CS
4
Q: How to bias a MOSFET class AB amp?

Lars HankelnI'm working on a class AB amplifier that is used to either source or sink current. The reason for using MOSFETs is space constaints and that high power BJTs are only available in large leaded packages. I tried to look around for some biasing circuits to reduce crossover distortion, but most desig...

23:09
3
Q: How would merfolk food presentation look like?

BoaHancockloverIn my world there are merfolk who live in their own underwater civilization. They are sapient with unique and complex social customs, and one of them involves food. Just like on land, merfolk royalty hold banquets/dinner parties. Cooking for merfolk is basically sushi, fish and crustaceans are sl...

4
Q: WWII Aid station tent

Monte GardnerCan someone help me understand how they made the curved top of the tent in the WWII Aid station

23:26
3
Q: How to prove that the equality relation is an equivalence relation?

ju soFraleigh's algebra book presents the following Definition. Let $X$ be a set. The equality relation in $X$ is the subset $$\{(x,x);\;x\in X\}\subset X\times X.$$ and also 0.19 Example of Fraleigh's algebra book says For any nonemtpy set $X$, the equality relation $=$ defined by the subset $$\{(...

2
Q: Browser is accepting italic/bold Unicode as part of SPAM email's URL

asker13This is truly crazy. I received a SPAM email in which there is a URL crafted from apparent Unicode characters that surprisingly exist for italic/bold letters, which when I reported it to Google's spam collector using Thunderbird's Report Spam Email feature it had already been converted to ASCII l...

23:51
4
Q: Why was it mandatory to attend a conference in person while publishing a paper in pre-pandemic times, and how will conferences run post-pandemic?

Geetika CharanConferences are a great platform to exchange ideas and to learn about different research areas. Also, more importantly, conferences expedite the process of publishing as journals may take months/years. However, my question is - "why was is it mandatory to attend a conference in person in order to...

TeX
TeX
2
Q: How to add downarrow above matrix in the right position?

Smith112358I am trying to add \downarrow to align with the second matrix shown below, so that the columns are aligned. Any idea how to achieve this? $$a_{11} = \begin{array}{c} \rightarrow \\ \\ \\ \end{array} \begin{bmatrix} & 1 & 3 \\ & 2 & 6 \\ & 5 & -4 \\ \end{bmatrix} \cdot \begin{arra...


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