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CS
CS
00:05
3
Q: Problem with the simulation of two different low-pass filters

elektronikI am trying to simulate the circuit below. Why do both low-pass filters show the same behaviour, even though their component values are different? Edit: How stupid of me. I used the label "In" for the both circuit. That is the why I got same result.

DIY
DIY
2
Q: How can I remove foamboard insulation from behind drywall so electrical box tabs have clearance to grab?

BrandonI'm planning on adding a lot double-gang old-work boxes to a wall that is made of 2" foam and 1/2" drywall on top of 2x4 studs. The tabs on old-work boxes don't reach far enough to grip the back of the foam, so I need to make some clearance right behind the drywall in the upper right and lower le...

1
Q: brace expansion together with non permuting lists {txtfile,index}{1..3}.{txt,html} I want `{txtfile,index}` to correspond with `{txt,html}`

Mr. Doge{txtfile,index}{1..3}.{txt,html} I want {txtfile,index} to correspond with {txt,html} to produce: txtfile1.txt txtfile2.txt txtfile3.txt index1.html index2.html index3.html but this code will generate all possible combinations I don't want txtfile1.html or index1.txt so the below doesn't work.. {...

RPG
RPG
00:59
8
Q: When forced away, can I move towards the caster, if my net distance away ends up greater than had I not?

AncientSwordRageThis concerns all forced movement, but is especially relevant for spells like Dissonant Whispers, that caveat how the creature moves. The relevant text for this sort of spell is quoted below: The target must make a Wisdom saving throw. On a failed save, it takes 3d6 psychic damage and must immed...

01:17
1
Q: How to find a list of related functions as mentioned in the documentation center?

Peter BurberyHow can I list functions related to a specific function in a notebook without opening the documentation center? Sometimes I think I have the right function and have trouble remembering similar functions that will do the job. For example, when I think of Tuples but need Subsets instead, it would b...

DIY
DIY
1
Q: All wires in thermostat junction box have high voltage

AᴍɪʀI'm a new homeowner and I'm trying to improve the heating in my new place! The heating is done with baseboards and it is currently using th104plus thermostats. My goal is to replace it with Mysa! In the junction box, I see 4 types of wires. One bare copper wire is connected to the metal box too ...

2
Q: A Hahn-Banach type extension problem for multiple functionals

user470412Let $X$ be a closed subspace of a Banach space Y. I have functionals $f_0, f_1, \ldots, f_n\in X^*$ such that $f_0$ is in the span of the remaining ones. I fix an extension of $f_0$ to $Y$; let me call it $F_0$. Can I extend them to functionals $F_1, \ldots, F_n$ on $Y$ in a way that $F_0$ is in ...

01:35
2
Q: Is there a (more-or-less) established spelling for “the us[ual]”?

Dan BronUnusual orthography When you visit your local diner, or favorite bar, and the server wants to know if you’d like your standard order, the thing you always get, they’ll often inquire, in shorthand: The us[ual]? It sounds just like the first syllable in the full word, ususal. I believe the IPA f...

2
Q: Getting a formula validation error, can anybody spot where I am off?

JoeDellIF ( AND ( ts2__Job__c.Days_Search_Open__c >= 0, ts2__Job__c.Days_Search_Open__c <= 4 ), "0 - 4", IF ( AND ( ts2__Job__c.Days_Search_Open__c >= 5, ts2__Job__c.Days_Search_Open__c <= 8 ), "5 - 8", IF ( ...

TeX
TeX
01:49
1
Q: Where can the default typeface of TEX be found? Is it possible to change it?

matj1When a TEX document is compiled, the engine uses glyphs from a typeface that has to be somewhere. I expect that the path of the typeface would be written somewhere in the TEX engine. If that is, where is the typeface? Is it possible to change a setting of a TEX engine so that it would look for a ...

4
Q: A question about finite group acting on inputs and outputs of maps between vector spaces.

James ArtenI'm reading this paper and considering the following notations/definitions: Let $G$ be a finite group, $V,W$ finite dimensional vector spaces and consider two maps $\phi:V \rightarrow \mathbb{R}$, $\Phi:V \rightarrow W$. Now we define: $$\begin{align} \psi(X) &:= \frac{1}{|G|}\sum_{g \in G}\phi(g...

2
Q: Which fasteners need the most torque? Will just one torque wrench with a wide torque range be enough?

WilliamTo service my car I'm in the market for a torque wrench. I've found an electronic torque wrench with a wide torque range from 10 – 135 Nm / 7.4 - 99.57 lb ft. This is high enough for the wheel nuts and low enough for many, but not all, of the other fasteners. I'd like to know whether I'm likely t...

02:07
2
Q: How to Add PopupMenu in manipulate?

ASHISH SHUKLAManipulate[Column[{ Plot[Sin[a x], {x, 0, Pi}], Plot[Cos[a y], {y, 0, 2*Pi}], Plot[Tan[a z], {z, 0, 3*Pi}]}], {a, 1, 10}] I want to put a popup menu here as Sin, Cos & Tan. So I can only display which plot want to display. Please help to do that. Thanks in Advance.

02:37
2
Q: Past or present tense, when reporting results?

Herman ToothrotThere are several questions about tense use in paper writing. My question is specific to the results section. What tense should it be used when reporting the results of the paper itself? "Two groups out of three had a higher incidence of..." "Group A is taller than group B" I guess both might wor...

5
Q: Which functions share a certain property of sinusoids?

Michael HardyAmong functions $f$ satisfying $\forall x\in\mathbb R\, f(x+p) = f(x)$ with $p>0$ are sinusoids $f(x) = A\sin(\omega x +\varphi)$ with $p=2\pi/\omega.$ These also satisfy the function equations $$ \forall n\in\{2,3,\ldots\}\, \forall x\in\mathbb R \, \sum_{k\,=\,0}^{n-1} f\left(x + \frac {kp} n ...

02:56
2
Q: How does Westboro Baptist Church support the idea that soldiers will go to hell?

Luke HillWestboro Baptist is a hyper calvinistic church with many inflammatory teachings, such as the idea that soldiers will go to hell. They have picketed at military funerals before. How do they support this teaching in the Bible?

5
Q: Why are eclipses of the James Webb by the Earth or Moon not permitted during the mission?

WoodyQuestion: Why are eclipses of the James Webb by the Earth or Moon not permitted during the mission? In https://ntrs.nasa.gov/api/citations/20150017756/downloads/20150017756.pdf. it is stated Shadows, or eclipses of the spacecraft by either the Earth or the Moon, are not permitted at all during ...

03:34
1
Q: How do flights fly on some special days when there are firecrackers bursting near the source/destination airport?

lousycoderI mean there might be festive nights like New Year eve, when there is spectacular display of colorful firecrackers in the sky, but when there are flights descending or ascending near a city with an altitude of 3000 feet, I feel that it is risky enough to fly flights that low.

03:56
4
Q: Could Short-Range Fighters Realistically Return?

Mark PriceI am shooting for a futuristic image of fighter warfare (similar to the depiction in Star Wars). As jets and long-ranged targeting have developed, aerial “turn-fighting” and short-range dogfights between fighter planes have been obsolete for a while. These scenarios seem even less probable betwee...

04:22
3
Q: What would be the most likely compositions of the red and blue moons to so almost uniformly reflect their colours?

RubrikonIn my previous question I asked if two moons, one with a red surface, the other with a blue surface, were each to reflect different light wavelengths of an equal luminosity at the same time if they would combine into a purple light being shined upon the local planet at night. Apparently they woul...

1
Q: What's the proper way to say someone else made a mistake?

maskA developer tagged a staging branch as if it were a production branch, so when I had to revert, I reverted to the staging branch and it crashed the server. We were told in chat and I asked if he's the one who did this. It crashed the server after I reverted to the branch, and then the manager sai...

Vi
Vi
04:35
1
Q: How do I prefill the vim command line with a function and then edit the result?

StevieDGot this function: function! TaskAnnotateWithFile() let uuid = GetUUID() :!task echo uuid . ' ' annotate -- ~/ endfunction The idea here is a I want to prefill the command line with something like this: :task 693614b6-0141-4e22-93cd-ebc37ef47d55 annotate -- ~/ I then want to be ...

4
Q: Why are O-antigens and H-antigens on (certain) bacteria called O and H?

Kurt HikesSomehow, despite extensive searching, I cannot find an answer.... Does O stand for oxygen and H signify hydrogen?

05:03
1
Q: Unresolved paradoxes or puzzles in financial economics

1muflon1What are some (unresolved) paradoxes or puzzles in financial economics? I am looking for paradoxes or puzzles like for example: The equity premium puzzle (Mehra & Prescott, 1985). Siegel's paradox (Siegel, 1972). Dividend puzzle (Black 1976) I am especially looking for some that were never reso...

RPG
RPG
5
Q: Can an Artificer, proficient in Mason's Tools, use Fabricate to reconstruct the statue of a petrified person which has been broken or shattered?

BoblawblahAm I interpreting it correctly that, yes, an Artificer in this situation would be able to reconstruct the petrified statue of his party member? The Petrified condition states: A petrified creature is transformed, along with any nonmagical object it is wearing or carrying, into a solid inanimate...

 
2 hours later…
06:44
3
Q: Colouring 3D columns defined by a piecewise function

jcmI am using a piecewise function to define the height of columns. My goal is to make a nice picture that illustrates the different heights of the columns using color. Below in the picture I have described what I have generated using code on the left and on the right I have illustrated what I am tr...

3
Q: What does it mean for a statistical test to be "robust"?

NateIs there an intuitive way of understanding what these two sentences mean and why they're true?: "ANOVA is 'robust' to deviations from normality with large samples", and... "ANOVA is 'robust' to heteroscedasticity if the groups have similar sample sizes".

Ham
Ham
07:07
1
Q: What is a "feed-through load" and how does it work?

natevw - AF7TBWhile browsing some miscellaneous RF test equipment supplies I stumbled across a two-port component sold as a "feed-thru load". Take for example the Pasternak PE6026 (datasheet), which looks physically like an attenuator (a slightly extended barrel with an "SMA male to female coaxial interface") ...

GIS
GIS
1
Q: Converting ArcGIS Spatially Enabled Dataframe to GeoJSON

AustinI've got a spatially enabled dataframe (SEDF) I'm trying to convert to a GeoJSON. Normally I do this as a 2 step process by creating a featureclass then converting that into a GeoJSON with SEDF.spatial.to_featureclass and arcpy.conversion.FeaturesToJSON; however, featureclasses can be cumbersome...

07:48
3
Q: Ernie and the Christmas Stars

PenguinoAlthough Ernie professes to be an atheistic rationalist, he does love the Christmas season. He thinks long and hard to find appropriate gifts, brushes up on his Christmas Carol repertoire, plans a sumptuous feast well in advance, pens a great sheaf of cards, and delights in decorating his Christm...

2
Q: commands to remove row from file if reverse row is in file

8i7ty8I lets say I have a csv that looks like: 1,20 1,13 20,1 I need to remove 20,1 because 1,20 is already in the csv. My idea to do this is to go row by row and check if the reverse is already in the csv, but I have no idea how to do this with a shell script. Edit: 2 of the same numbers will never b...

08:10
5
Q: Group of an Elliptic curve.

MarcosIn my algebraic geometry course I found the following problem: Let $E$ an elliptic curve over the field $\mathbb{F}_5$ given by the equation: $$y^2z=x^3+xz^2-z^3$$ Find the group asociated to $E$. Doing some computations and with quadratic residues I found that $E$ has the following points: $$[0:...

08:23
11
Q: AoCG2021 Day 4: Infinite Elves and infinite houses 2

lyxalPart of Advent of Code Golf 2021 event. See the linked meta post for details. Related to AoC2015 Day 20, Part 1. Here's why I'm posting instead of Bubbler and why not emanresuA To keep the Elves busy, Santa has them deliver some presents by hand, door-to-door. He sends them down a street with in...

 
1 hour later…
09:50
1
Q: Illustrator 2022: How can you interlock chainlinks when each chain link is above and under another?

AdmiralAdamaI've tried all afternoon to create these thick black (which will be 3D) interlocking chain links and have had no success. I've tried recreating the chains in pieces, I tried using the scissor tool, but every time when I make it 3D, the main problem is that each link in the chain is both in front ...

1
Q: Explaining a "Great Circle Route" to young Civil Air Patrol cadets

757togaWhat would be an easily understood explanation of a "Great Circle Route" for young Civil Air Patrol cadets who are being introduced to aviation and navigation principles for the first time?

6
Q: What is the earliest story to deal with clones?

jmorenoI’m looking for the earliest story with clones (genetic duplicates of people created via technology) in it. Just how old is the trope?

DIY
DIY
10:13
1
Q: Does this light switch wiring seem wrong?

Ray ChengI'm trying to replace this regular light switch with a dimmer. After I open the cover, there are 2 groups of wires from the wall. I don't know why the white wires are not used, but this is the original wiring. Left Group 2 white (not used) 1 copper for ground (connected to right group ground) 2 ...

2
Q: How strong was Darth Vader?

SDHDarth Vader was comprised of many robotic parts. Just how strong was he with those parts if we don't take into account modifying his strength with the force? Is there any evidence that he had super strength? He picked up the emperor over head fairly easily when he was pretty beat up so I have to ...

1
Q: Spoke Tension Drive Side and Non Drive Side

Jim KlaasBuilding up a set of Asymmetrical Rims.Let's just say the manufacturer calls for 120kgf on the drive side and 110Kgf on the Non Drive Side. When I tension the spokes everything seems to work out well "except" when all the spokes are 120kgf on the drive side in order to keep the wheel true not all...

11:20
5
Q: Trying to fit a circle. Data have weights

Jerrydata = {{-2.5, 0.0}, {-2, 1.1}, {1, 2.1}, {0, 2.5}, {1, 1.9}, {2, 1.1}, {2.5, 0}, {2, -1.3}, {1, -2.2}, {0, -2.5}, {-1, -2.2}, {-2, -1.2}, {-2.5,0}} w = {.1, .2, .5, .1, .5, .6, .1, .1, .4, .2, .1, .1, .3} (* 1st fitting method - this method works but I do not know how to extract parame...

2
Q: How to deform a material with nodes

ChristophI want to place a text on a mesh that has the shape of a branch. the text is embedded in a material. is there a way to deform the text with nodes so that it fits exactly, like in the reference? thanks! Blend File

3
Q: Why did the X68000 use 5.25" drives?

userThe Sharp X68000 came with two 5.25" floppy drives. Later models moved to 3.5" drives. Why did Sharp choose 5.25" over 3.5"? When the X68000 was released in 1987, 3.5" drives were well established and used in several other 16 bit machines, such as the Amiga and Atari ST.

3
Q: Compressible Ebin-Marsden?

Willie WongIn Ebin and Marsden's paper Groups of Diffeomorphisms and the Motion of an Incompressible Fluid, there is a footnote on the first page indicating that non-homogeneous cases and the case of compressible fluid mechanics will be treated in a forthcoming paper. Having taken a search through MathSciNe...

12:09
1
Q: Any book which is intro to PDEs but prioritises techniques useful for solving Black-Scholes?

userPrimeNumberSummary: Can you recommend any book which is: Intro/first course in PDEs Covers solution methods useful for Black-Scholes model? Background I have just started learning about PDEs (after studying the ODEs) with the aim to understand in depth the Black-Scholes PDE solution (an then move to more ...

TeX
TeX
1
Q: How to create a table with row properties

tungsondkhProbably a question that has appeared somewhere before, but I have not found a comprehensive solution to it yet. How to create a table with custom row height (eg. 5cm), vertical center and horizontal center. Thank you very much! P/S: I used to use \newcolumntype but I can only modify the attribu...

12:29
2
Q: SRAM GXP crank partially stuck in bottom bracket

Aaron BramsonI (unfortunately) have a SRAM Apex GXP crankset that I need to replace after less than a year of use because it's garbage. But I can't get the crankset out of the bottom bracket. I've taken the bolt out, and even removed the non-drive side BB cap, and usually a GXP crank would basically just sl...

12:45
4
Q: ultrafilters as linear orders

Jordie VincentIn Henson's Model Theory lecture notes I found an exercise quite early on (1.30, p. 12) that prove too difficult for me. It goes like this: Let $L$ be the first order language whose only nonlogical symbol is the binary predicate symbol $<$. Let $\mathcal{A}=(\mathbb{N},<)$ and let $\mathcal{B}=\...

7
Q: Short story about what Earth looks like when people all disappear?

Alex ReynoldsDoes anyone remember a short story about all of humanity vanishing from Earth, and the story describes what happens over time, as industrial infrastructure collapses (nuclear and chemical plants, pollution, etc.)? The storyline is not about people, or why they vanished, but entirely all the infra...

13:19
3
Q: Is Galdalf really on 'du' terms with the Balrog? (Odd 'duzen' example)

RDBuryGandalf's line "You shall not pass!" from The Lord of the Rings: The Fellowship of the Ring is something of a meme, so I naturally wondered how it was translated into German. This video has the relevant dialog (once at :40, and again at 1:15). Gandalf says "Du kannst nicht vorbei!" There are a fe...

13:53
2
Q: Is acceleration absolute and if so, how can we measure it?

SolidificationA person standing on a uniformly moving car can never know (without looking outside) whether the car is at rest or in motion at a uniform nonzero velocity w.r.t earth. However, in the case of a person standing on a uniformly accelerating car, due to the effect of pseudo forces, knows that the car...

2
Q: How to explain the warp gate looking like a giant funnel in space but its working principle is a spherical wormhole?

user6760In many sci-fi tropes, a warp gate or artificial traversable wormhole almost always resemble a funnel however in reality its working principle is a wormhole. I would like to know how does it appears to look like a funnel when it is functioning like accepting visitors?

6
Q: Algebraic atlas on smooth manifolds

ZeroxA real/complex rational atlas on a smooth closed manifold $M$ is an atlas with charts homeomorphic to Euclidean open sets in $\Bbb{R}^n$/$\Bbb{C}^n$ covering $M$ and real/complex rational transition maps. A real/complex rational structure is a maximal collection of compatible mentioned real/compl...

ELL
ELL
14:49
1
Q: Can anyone tell me the meaning of 'work out / fit in' in the sentence?

leo This all felt a bit much for a time of year when the most stressful thing I normally face is 'working out if I can fit in a fifth mince pie', or whether it's best to leave it at four. I'm confused with this sentence because of the words 'work out' and 'fit in'. The author got a notice letter of...

14:59
4
Q: What are the downsides of putting GNU coreutills first in ${PATH}?

Tom HaleI'm coming from Linux to macOS, and many of my scripts assume GNU versions of the utils provided in GNU coreutils. I could just put the GNU coreutils bin directory in earlier in $PATH than /bin. Is this commonly done? If I do it, what downsides/breakages should I expect in future?

15:20
2
Q: How can I make a really gingery cookie?

adam.bakerI have tried various ginger cookie recipes over the years, for gingersnaps, gingerbread cookies, pfeffernusse, and most recently pepparkrakor. I never find the cookies to be spicy enough—I assume, not gingery enough. What can I do to bake a really spicy cookie? By way of prior research: I am ofte...

15:33
2
Q: What does the ICU License state about third party rights?

SomOne ElseThe license link. Can someone elaborate "NONINFRINGEMENT OF THIRD PARTY RIGHTS"? What is being implied here? It's confusing to me. I will choose the answer with most votes.

CS
CS
2
Q: Are there countries where being non-vaccinated disqualifies you from "standard" health insurance coverage (for that particular disease)?

FizzReading the latest news on Greece imposing fines on the non-vaccinated: "It's not a punishment," Greek Prime Minister Kyriakos Mitsotakis told his cabinet in a televised meeting. "I would say it is the price for health. It is also an act of justice for the vaccinated. It's not right that they ar...

15:52
1
Q: How to check OP_CHECKLOCKTIMEVERIFY?

zerotobtcI try to simply get into the OP_CHECKLOCKTIMEVERIFY opcode and test it. However I get the error error: Locktime requirement not satisfied no matter what unix- or blocktime I enter in my btcdeb. I wanted to check out another debugger, but for example the bitcoin IDE does not even know OP_CHECKLOC...

CS
CS
16:24
1
Q: What is the correct way to draw NFA of RE (a|b|c)?

Harshil ModiWe were assigned to draw NFA for regular expression a|b|c, so like any one I draw this But my professor told me it is wrong, the correct way is So, I checked it on online tools toolbox by cyberzhg, and regexper and according to both of them I am also correct. Professor's argument was in maths f...

Law
Law
2
Q: Why is trying to get "vaccinated" into a fake arm considered fraud (in Italy)?

FizzI'm curious under what legal provisions this bizarre story falls under in Italy. An Italian man is facing charges of fraud after turning up for his Covid-19 vaccine wearing a fake arm. [...] After completing the bureaucratic formalities, including signing a consent form in front of a doctor, the...

RPG
RPG
3
Q: Does the Spirit Guardians area of effect go around corners?

ThreeStarDaveSpirit Guardians has a Range of Self (15-foot radius) (and adds in the description that the Spirits "flit around you to a distance of 15 feet for the duration") Given this situation: The cleric (in yellow) casts the spell. The door to the room below is open. Does the foe in that room take damage...

4
Q: How would you discover Stokes's theorem?

littleOLet $S$ be a smooth oriented surface in $\mathbb R^3$ with boundary $C$, and let $f: \mathbb R^3 \to \mathbb R^3$ be a continuously differentiable vector field on $\mathbb R^3$. Stokes's theorem states that $$ \int_C f \cdot dr = \int_S (\nabla \times f) \cdot dA. $$ In other words, the line int...

16:48
2
Q: じ/ず conversion in 人は動かじ

Eddie KalThere is this famous quote reputedly from 山本五十六: やってみせて、言って聞かせて、やらせてみて、 ほめてやらねば人は動かじ。(source) やってみせ、言ってきかせて、させてみて、誉めてやらねば人は動かじ。(a different version. source) Do it and show'em; say things and make'em listen; try and let'em do things; and if you don't praise people (for what they do), people don't...

17:11
2
Q: How to derive a general relationship between the Ramsey-Keynes rule and the law of motion for capital?

Denis DinandConsider a representative agent model where the representative agent has standard preferences $\int^{\infty}_te^{-\rho t}ln(c(t))dt$ where $\rho>0$ and $c(t)$ is consumption in period t as usual. And the production technology is something of the form $y(t) = z(t)f(k(t))$ For example, to simplify ...

2
Q: Schema.org's itemscopes that are not mentioned in Google documentation

KifsifSchema.org is much richer in items than Google's documentation. For example Quotation or Diet. Google is one of the founders of schema.org, though it is independent. Could you tell me whether schema.org's itemscopes that are not mentioned in Google documentation are at least taken into considerat...

18:00
2
Q: Are old package versions removed from their Ubuntu apt package repositories just because they're old?

habitNote: this question can apply to any version. I just chose an end-of-life (and therefore in the past) one in the example to avoid "one can't predict the future"-type answers. The example, to make the question clearer: if I had kept running sudo apt-get install <specific-package>=<specific-version> &

TeX
TeX
2
Q: Why is the line spacing different between these paragraphs?

GladstoneBrookesIn the following two paragraphs, the line spacing seems to be wider in the bottom paragraph, and I can't for the life of my fathom why: The code for this part plus a little before and after is {\small \noindent\vb{Systems of First-Order Linear ODEs}\\ %parts omitted for brevity ...

18:45
1
Q: How to permanently disable the Mac startup sound?

AlexI am using a MacBook Air (Mojave, 10.14.6), and I want to permanently disable the awful Startup Sound ("chime"). I tried any of the following commands: sudo nvram SystemAudioVolume=%80 sudo nvram SystemAudioVolume=%01 sudo nvram SystemAudioVolume=%00 sudo nvram SystemAudioVolume=” “ After each c...

19:03
5
Q: Draw a 2d graph using slashes

Maghil vannanGiven a list of integers a 2D graph has to be plotted taking 1st, 3rd, 5th, ... numbers as upward slope and 2nd, 4th, ... numbers as downward slope. I have used a Python list to do it. Is there any further optimization possible with Python? Sample input: 3, 1, 2, 3, 6, 2, 3, 6, 2, 3, 6, 3, 2, 3,...

19:16
4
Q: Could "E7(♯9)" be plausibly called "Em7(♭11)" or "Em7(add ♭11)" as well?

piiperi Reinstate MonicaThe so-called Jimi Hendrix chord is commonly called E7(♯9) or E7♯9, implying that it "is" a major chord, but with kind of a minor third added for flavor. Not caring about the chord already having a commonly used name, and the voicing of notes in the Hendrix chord having the third lower than then ...

CS
CS
3
Q: Does the word "we" in 2 Corinthians 5:11-20 refer to Paul and the apostles or to the church as a whole?

Andrew CrispIt seems the word "we" sometimes refers just to the apostles (eg verse 12-13). Other times it refers to everyone (eg verse 21). However it is often ambiguous (eg verse 14, 20).

1
Q: Reinforced concrete by steel, poor durability, why?

eXPRESSI've been reading up about reinforced concrete, as it is one if not the cheapest way how to build (with some solid foundation). I found out that it actually has quite poor durability (50-100 years or something). The reason for this, if I understand correctly, are the steel rebars, which work insi...

19:34
1
Q: Is there less noise in an E-MOSFET than in a D-MOSFET and if so, why?

Mathieu KrisztianSince there is a threshold voltage needed to switch on a E-MOSFET, as compared to no threshold voltage needed to switch on a D-MOSFET, I would deduce that a E-MOSFET has lower noise than a D-MOSFET. Is my reasoning correct? Is there less noise in an E-MOSFET than in a D-MOSFET, and if so, why ?

1
Q: Shorten Excel "IF" formula?

bat_cmdThis formula does work but it is enormous: =IF(X3=B2,K2,IF(X3=B3,K3,IF(X3=B4,K4,IF(X3=B5,K5,IF(X3=B6,K6,IF(X3=B7,K7,IF(X3=B8,K8,IF(X3=B9,K9,IF(X3=B10,K10,IF(X3=B11,K11,IF(X3=B12,K12,IF(X3=B13,K13,IF(X3=B14,K14,IF(X3=B15,K15,IF(X3=B16,K16,IF(X3=B17,K17,IF(X3=B18,K18,IF(X3=B19,K19,IF(X3=B20,K20,IF(...

2
Q: Proper loss function for regression with uniform target distribution

Josemi I'm doing some simulations and I would like to estimate a real number that is uniformly distributed between minValue and maxValue. For instance, between 20 and 30 (it's not an angle, so estimating its sine isn't appropiate). So far, I have used the MSE loss, but after plotting the histogram of th...

CS
CS
20:10
1
Q: Can I use logic inputs higher than Vcc but still in the operating voltage range of the IC?

FZsI'm trying to create a battery-backed-up non-volatile RAM using an SRAM IC (AS6C1008 from Alliance Memory, datasheet). My idea for separating the backup battery from the main voltage source is to use two diodes like this: Because of the diodes, the RAM chip will only receive about 4.5 V as Vcc (...

4
Q: Can you create an implant that detects a person's thoughts and feelings?

Lucie ChaussureIs it possible to put, on a mentally ill person, a surveillance implant that detects said person's emotions and thoughts? This 'chip', 'implant' or other monitoring machine should be able to monitor movement, emotion, and thought.

2
Q: Fundamental principle of counting in bench seating choice preferences in a subway

BehemoothA subway car has $10$ individual seats, with $5$ in front and $5$ in back. From $10$ ​passengers, $4$ prefers front seat, $3$ prefers back seat and the others have no preference. In how many ways can passengers be seated, respecting preferences? Attempt: I want to solve using only the notion of F...

4
Q: 12 coins problem but you can't understand the scale

user125You have 12 coins 11 are real, one is fake but you don't know if it is lighter or heavier. You have a scale that gives you output but you don't understand it (let's say it is written in a foreign language that you don't understand). Using 4 weightings how do you determine who is the fake coin? ed...

20:35
1
Q: Why does a body accelerate when there is force applied on it?

Arsenal CreationWhy does a body accelerate or changes velocity when a force is applied on it? What is force? If your answer is that force is a push or pull then explain what is push or pull cause i am from another world and i don't know about these things. There are two questions here but they are related to the...

20:47
2
Q: Unsolvable hidden words puzzle even with solution

RobberI got a (German) puzzle advent calender. Today's puzzle is the following: We are looking for a full (German) sentence. If you aren't a German speaker, this is the sentence we are looking for: The question is, how do you find this answer? Hint: The "solution" has this to say about the process to...

1
Q: Lilypond avoid \melisma code

MahanidhiTo align lyrics to music properly, instead of using \melisma and \melismaEnd, I found this method: \version "2.20.0" ... \addlyrics { Che -- _ _ _ ta -- na __ _ _ _ } Is this ok? or is better to use the melisma code?

21:06
1
Q: Applying for a Canadian work-visa, at what stage do I get a UCI? Is this a scam

QasimI had an emigration consultant offer to help me get a work visa for Canada (I work in IT). It ended up costing a lot more than he initially said (first he said it'll cost $700, he's asked for $3000 and is asking for more still). It's "Dream Life immigration". Incidently, used to be "Cream Life im...

5
Q: PSE Advent Calendar 2021 (Day 4): Decorating with Ingrid Deduction

Jeremy DoverThis puzzle is part of the Puzzling StackExchange Advent Calendar 2021. The accepted answer to this question will be awarded a bounty worth 50 reputation.< Previous Door "Ingrid! I’m so glad to see you. But...you are a day early?" "They predicted a blizzard in Edmonton, so I caught an earlier fli...

2
Q: Value of contingent claim at a given time

aquant6435Consider a contingent claim whose value at maturity T is given by $\min(S_{T_0}, S_T)$ where $T_0$ is some intermediate time before maturity, $T_0 < T$, and $S_T$ and $S_{T_0}$ are the asset price at $T$ and $T_0$, respectively. Assuming the usual Geometric Brownian process for the price of the u...

21:22
2
Q: How to make c[n_, x_, y_] := ToExpression["p" <> ToString[n]] = {x, y} work?

Red BananaI am trying to do the following: c[n_, x_, y_] := ToExpression["p" <> ToString[n]] = {x, y} That is: Evaluating c[1,1,1], yields the assignment p1={1,1} but this is giving me the following error: Set::write: Tag ToExpression in ToExpression[p2] is Protected. I have also tried: c[n_, x_, y_] :=...

21:51
1
Q: Is it a good idea to publicly release an idea after filling PCT application but before ISR is published?

Raul AlvarezIs it a good idea to put an idea included in a PCT application in the public domain so that it becames prior art? Is it a good idea to do so before the International search report is done? And after the ISR had a postive result and before the ISR is publicly released? Can this be seen as a defens...

TeX
TeX
1
Q: Text label in MetaPost: language support

VladimirI am working with the example: beginfig(1); label.urt("Текст на русском.", origin); label.llft("Text in English.", origin); endfig; The output contains: Missing character: There is no 208 in font cmr10! Missing character: There is no 162 in font cmr10! Missing character: There is no 208 in font ...

CS
CS
22:16
2
Q: Request for Good Encyclopedic works of computer science

GL_nI attempt to find a few general encyclopedic works on computer science such that looking up relevant terminologies is easily available ready to hand. I'm not familiar with the whole picture of computer science so I can't describe precisely the delicate character of what is a good encyclopedic ref...

1
Q: SOIC-8 package size error

Simon CoopI designed a PCB using both NE5532 and OP177 opamps. In principle both opamps are in SOIC-8 packages. However when I received the opamps, I found the NE5532 are much larger than the footprint they were designed to have on the PCB (using the KiCad SOIC-8 3.9x4.9mm footprint). If I measure the widt...

22:51
1
Q: Before Qe6 in game 6 of the World Championship 2021, was it really a draw?

BCLCIn game 6 of the World Championship 2021 between Magnus Carlsen and Ian Nepomniachtchi, before Qe6 the engine says +0.9 at around depth 30/99, but I heard supposedly it's a (theoretical) draw. I know there are some cases of fortresses that have evaluations with absolute value greater than 3.0, bu...

1
Q: Can you identify these cryptographic algorithmic symbols?

hunterI am mostly self taught and have limited knowledge of the symbology in the image below. It is a diagram of a sub block the RIPEMD-160 algorithm: Are such symbols standardized? Is there a good dictionary or atlas someone is aware of that could link such symbols to their definitions? Here is the s...

1
Q: What are the ideal conditions for changing oil in a car engine?

TomI own a Ford Transit Connect 2012 1.8 TDCI and am planning on getting the engine oil changed. I can decide between two mechanics. The first one is about an hour away. The other one is only about 10 minutes away. What are the ideal conditions for changing oil in a car engine? Should the engine be ...

2
Q: What is a nice synonym for "significant other" in Italian, except "partner" and "amore"?

FabioSpaghettiI am looking for something more desirable than partner or amore in Italian. Of course amore is nice but it translates to love, but to say more indirect, is there anything else?

CS
CS
23:06
3
Q: How did Russia suddenly change from being an atheist country to being a Christian country?

NemoI know that religious faith is a personal thing, some people have a stronger faith than others, and for some people religion is more a matter of cultural identity than personal conviction. Also how much politicians talk about religion (or brief journalists about it) can be influenced by how it is...

TeX
TeX
2
Q: Fine point with Tkz-Tab

Nicolas FRANCOISI'd like to do this with the package Tkz-Tab : But I can't seem to find the option to insert the double vertical bars that I added in red to the image. Does someone know how to do this ? This is the code I used to draw this table : \documentclass{article} \usepackage{tkz-tab} \begin{document} \b...

DIY
DIY
1
Q: Why do three-way light switches have a "top"?

jay613Some, but not all, three-way light switches are marked with a "Top". Why? Here are some examples. These pics are all taken from ordinary three-way Decora light switches. Leviton: Cooper: Legrand: It's easy enough to search for photos of ones that do not have the marking. The first one I saw ...

2
Q: Why is this position a forced mate?

ZsigEI was playing a game against one of the chess.com bots, as shown below (I was playing as white). On analysing the game afterwards, I'm aware I made a lot of mistakes, but the one I'm really confused by is move 29. [FEN ""] [Event "Vs. Computer"] [Site "Chess.com"] [Date "2021-12-03"] [White "ZsigE"...

DBA
DBA
1
Q: How to import only a specific database from a .sql file?

BasjI have a file dump.sql with many databases in it: mydb1, mydb2, mydb3, etc. How to import only mydb3 and not the other databases? Won't: mysql> create database mydb3; mysql> use mydb3; mysql> source /path/to/dump.sql; import all databases?

23:23
2
Q: payment as share

MertI completed a project for a private ltd company. they want to pay me in company shares worth 100k. I am trying to figure out what tax implications would I face and what is the solution to pay as little tax as possible in short term. should I ask them to pay in share options? can share options be ...

1
Q: How close does a photon have to get to a black hole to do a full loop?

blademan9999How close does a photon have to get to a black hole to do ONE full loop? By full loop I mean it curves once around the black hole and ends up on the same trajectory as it was one before it approached the black hole. Like this: How many time the $R_s$ does it have to approach?

RPG
RPG
6
Q: What happens to the simulacrum of a wizard who scribed a scroll of simulacrum, when the scroll is used?

Stephen DavisDoes the wizards simulacrum melt when the scroll is used? Or can the wizard make gold off scribing scrolls. I’m asking because the wizard is heir to a ruby mine but doesn’t want to be like his father so became a wizard. Long story short is he has the rubies taken care of, and I don’t want to go i...

23:39
12
Q: Polynomial for very large number of roots

Dan BoschenI have the roots for a very large order polynomial (>100), and from those alone wish to recreate the polynomial and run into numerical challenges when using the poly function for doing this available in Matlab and Python (numpy). I attempted to convolve the coefficients for the roots and still se...

23:53
2
Q: How to fill the first region enclose by a self-intersection parametric curve

herbertfedererFor an arbitrary self-intersection parametric curve, how to construct the region at its first instersection. Thanks! plot = ParametricPlot[{Cos[s] + Sin[4 s]/12, Sin[3 s] - Cos[7 s]/4}, {s, 0, 4.5}]

CS
CS
2
Q: LED Driver Design

yntktsI'm trying to make a transformer-less LED driver with some high power LEDs and found I this circuit with a 130 mA output: Can someone explain for this circuit: Do the voltage changes depend on the load? If so, what is the load of the LED? I looked up in the datasheet that the LED requires 3.3 V...

3
Q: How to explain the differences in Matthew 19:16-17 translations?

Mike BordenThere appear two very (frustratingly) different versions of Matthew 19:17 in english translations: And he said unto him, Why callest thou me good? there is none good but one, that is, God: but if thou wilt enter into life, keep the commandments. - KJV, YLT, (others) And he said to him, “Why do...


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