Is it possible updating our system which is now on 2.2.6 straight to version 2.4? Or is it advised / needed to upgrade in steps? Any recommended recent howto on this subject?

I import a XML file, using: xmldatatest = Import["C:\\...\\...\\name.xml", {"XML", "XMLObject"}, "ReadDTD" -> False] The file looks like (in real, the file is much longer): > <?xml version="1.0" encoding="UTF-8"?> <TimeSeries > xmlns="http://www.wldelft.nl/fews/PI" > xmlns:xsi="http://www.w...

i am using nginx to detect webp support in browser: # Check if client is capable of handling webp map $http_accept $webp_suffix { default ""; "~*webp" ".webp"; } this code works ok and assign .webp to $webp_suffix when client support image/webp then few lines later i am using this ...

I have encountered this sentence: Ich hatte trotz vieler Jahre Englischunterricht in der Schule Probleme mit der Sprache. I know this type of genitive, where the word doesn't have an article: Das ist die schönste Stadt Deutschlands. Now my question is, in the first sentence why isn't an "s" a...

In my QM book I often see partial derivatives mixed with kets, like $$ \frac{\partial}{\partial i} |\psi \rangle $$ where $i \in {x, y, z}$. Here I'm assuming that $| \psi \rangle \in \mathbb{C}^n$ for some arbitrary $n > 0$ (in particular $n$ can be much larger than 3). Question: What is a part...

PALISADE offers a pool of Homomorphic Encryption schemes and it is stated that "PALISADE is a general lattice cryptography library ...". My question is rather simple: are all homomorphic encryption schemes based on lattice-based cryptography?

One of the biggest problems about writing merfolk warfare is related to weapons. You can not slash underwater without expending a lot of energy, stabbing is much easier. Water has more drag than air and makes the sword move slower. That’s why in my merfolk society, swords are very rare. Most merp...

In most countries, there is usually a gap between election day and the time when the elected official assumes office. Example: In the United States, the President is elected in November but does not assume office until January. In Germany, the Bundestag is usually elected around September, but i...

I am seeing lots of statements online to guitarists that they should be careful to use the specific backing track for a mode. It seems to me that you should be able to use one backing track for all modes of a given scale as long as it's compatible with the parent scale for those modes (by 'parent...

I'm quite confident in asking this question because there is no duplicate of this question on this site and I didn't find on the internet either. The plural of giraffe, according to Merriam Webster and some other dictionaries I checked, is "giraffes". Normally when the final sound of an English w...

In my somewhat unrealistic schoolproject regarding space tourism to Mars we have to accellerate a 500 ton module (mass of propellant and engines not included) from LEO to an orbit around the sun at Mars' distance. We have to transport all the fuel and propellants to the module ourselves. When cho...

I understand that for any nonempty set $S$ of characteristics, there exists a PID $R$ such that the set of characteristics of residue fields of $R$ (i.e. quotients by of $R$ by maximal ideals -- I'm not including the residue field at the generic point. Thanks to Steven Landsburg for pointing out ...

I picked up this PET and trying to restore it. Screen is garbeled on boot and stays like that displaying random chars, some of them flashing. Tried to resocket the chips, but it didn't help. I don't have a logic analyzer, and ram chips are not socketed. What sort of checks I can I do to identify ...

In season 6, the third Officer Challenge requires getting 40 longshot kills with an ACOG scope. Acog Longshots: Get 40 Longshot Kills while using an Acog Optic (6,000 XP) I looked quickly through some ARs and I can't find any scopes that had the letters ACOG, and searching it online brought me ...

Let M be a smooth orientable compact connected (with boundary) manifold of dimension 4. In addition M is assumed to be aspherical and acyclic. question: is there a "classification" of such manifolds? Or can they be classified in any effective way?

I am generating a polar projection with the rnaturalearth::ne_countries() dataset. Because I'm only interested in high-latitude regions, I want to crop the shape above a particular latitude. However, when I crop, transform, and plot, the southernmost extent of each country that remains in the dat...

Are there any minimal pairs between ø and œ or other evidence that these are separate phonemes? I have been studying French, and so far it seems like ø is found in open syllables and œ is found in closed syllables. Wikipedia counts them as separate phonemes: https://en.wikipedia.org/wiki/French_...

What is the mathematical cause of the "quantum" in quantum mechanics? What causes some observables to take on discrete values? There seem to be two different causes, compactness of symmetry Lie groups, and bound states. I haven't been able to find a full explanation of either cause, and am also w...

I'm struggling either proving or disproving the following statement: Let $K\subset \mathbb{R}$ be compact, and $S = \mathrm{span}\{p_k, k = 0, 1, \ldots\}$, where $p_k$'s are polynomials over $K$. If $S$ is dense in $C^1(K)$ with respect to sup-norm, then for any $f\in C^1(K)$, there exists $\{g...

I asked a similar question previously (https://bit.ly/3llhmFE). This one is similar, but different. I have a list comprising a sequence of digits 1, 0 and -1, for example: l = {0, 0, 1, 1, 1, 1, -1, -1, -1, 0 , 1, 1} I want a function to return the result: {0, 0, 1, 0, 0, 0, -1, 0 , 0, 0, ...

The International Space Station is in a different gravitational field than us on the earth's surface. Almost all computers / protocols depend on the unix epoch being consistent everywhere. The unix epoch is same for all computers on the earth's surface, since they are in the same gravitational fi...

In Harry Potter, Quidditch matches involve Chasers attempting to score 10 points at a time by throwing the Quaffle through one of the three hoops at the appropriate end of the Quidditch pitch. Said three hoops appear to be quite large... large enough for a human to fly through: Is it legal for a...

How can I request options: for a certain stock that currently has no options traded? at a more extreme Strike Price? E.g. if I fancy buying OTM options? with a farther expiration? Does the CBOE have a specific email or online form for requesting options?

Yet another question, sorry, this one should be quick. So I'm making an airplane with a motor at the front, do I use CW or CCW props? Pretty sure this is what counts as a puller plane(is that the right term?).

Suppose I have the following data with co-ordinates: {{1,190},{1,200},{1,210},{1,180},{1.5,175},{1.5,200},{1.5,190},{2,100},{2,150}} How do I make a listplot of this data set, by taking the mean of the y-values for a particular x-value and then plotting an error bar. Since this is a small data se...

I know radio buttons are ideal for this but everyone wants checkboxes. In this case I have two checkboxes in my markup and if one is selected I want to make sure the other is not. The code in my JS below seems to be doing what I want. At least from the console. But the view is not getting updat...

Normally (on defense), you try to play in a way to reasonably "signal" and inform partner of your holdings. But suppose partner is the weakest player at the table, and is unlikely to read your signals. So you shift gears and play to mislead declarer, instead. On the other hand, if declarer were y...

It is commonly known that electromagnetic radiation from an antenna is polarized; the electric field is parallel to the rod and the magnetic component is perpendicular to it. What does the radiation of a magnetron look like? Is this radiation polarized, is it continuously or periodically declinin...

I wrote a program that read a csv file that contain 100 rows that look like: 1;S****L;SCHOOL 2;*A*G*A*;HANGMAN then try to guess the letters like in a hangman game. My scope is to count every right and wrong letters and then sum them up. The code works fine, I get around 1670 right + wrong attem...

So I am running the Baldur's gate: Descent into Avernus module and my players are taking very long to approach certain situations. To set an example: There is a gate with two guards who are checking everyone who passes through. They need to get inside (because of their own choosing and also their...

I'm looking at existing circuits and trying to understand them so I can design my own. Also to improve my electronics knowledge, for some reason MOSFETs have never quite sunk in for me. I came across the circuit for this board (the files from here (Rev D)) which the company are gracious enough to...

A post on www.twitter.com [link] has garnered over 100K retweets and 345K likes which states: So it turns out the monoclonal antibodies that Trump is on are from fetal stem cells. So Trump is being treated/saved with dead babies. Republicans? Amy Barrett? Pro-lifers? Anybody? The implied releva...

Consider this code: struct A { template <typename T> concept foo = true; }; It doesn't compile. My Clang 10 gives me error: concept declarations may only appear in global or namespace scope, and GCC says something similar. Is there a reason why it's not allowed? I don't see why it couldn...

Why wasn't screenshot translated as 屏幕 圖? Isn't 截 inaccurate? I screen shot (coincidence!) 截 on CUHK. Here I 截 the Web page to screen shot just the English meanings, but screenshots can be NOT 截. I can screen shot whole screen.

could someone explain what happens in this code: example here: https://ideone.com/1cFb4N #include <iostream> using namespace std; class toto { public: bool b; toto(bool x) { cout<< "constructor bool:" << (x ? "true": "false")<<endl; b = x; } ~toto() {} }; in...

I started working for Doordash, a food delivery service. Technically I think I am a self-employed contractor. I saw online that you don't have to declare taxes if you make less than $12,200 in a year. However I also read that you're supposed to declare taxes if you make more than $400 as a self-e...

I stumbled on a curious case of Richard Guy's Strong Law of Small Numbers because of a typographical error. I intended to type a^3 + b^3 + c^3 - 3 a b c and look at its values (Problem A1 on the 2019 Putnam Exam), but I omitted the exponent on $b$ and it came out as a^3 + b^+c^3 - 3 a b c. Mathem...

Supernatural divinities are the primitives' answer for why the sun goes down at night. [Brother Cavil (Lay Down Your Burdens, Part 2)] Now, don't get me wrong, we can deduce roughly what Cavil was talking about: "lowers" with less knowledge and/or intelligence who lacked a scientific background...

Not being able to speak Latin I really cannot find a way to say this that I think is satisfactory. I would like to portray this in the sense of my own children that are alive but not with me. In a way that represents the fact we will be together again in the future and until then I think of them ...

I have a situation where I need to generate lists which contain a mix of numbered items and non-numbered items. Only the numbered items increment the counter. So something like this: I know how to suppress the bullet by using \item[], but it looks like whether an item is numbered (and increments...

I have a radio installation with two KX-155 Nav-Comms. These radios are equipped with a photocell to automatically dim the displays to match cabin lighting. In dark lighting, the digits fade to the point of unreadability, with some segments being visible and some not. I can brighten and read t...

Such that, using nodes, we could dynamically combine the hue, saturation and value to two given colors. Example : Red + Blue = Purple / Violet Green + Black = Dark Green Basically, this is my node setup. Running the noise texture through a color ramp gives me random noise of varying size in the ...

In a remote shell, how can I find the domain name of the computer from which I logged into the remote machine? Example: My local machine is mi.pona.com. On this machine I run ssh [email protected] to login into the remote machine sina.pona.com. In the shell which opens (running on the remote m...

I have a query that runs quite slow (see below). While searching for a way to improve it we found that the query runs about ten times faster if we replaced the LEFT OUTER JOIN with LEFT HASH JOIN The result seems to be the same. Is it? In what cases wont it return the same result? What difference...

Next: Trichain: Going Higher Trichain is a new puzzle type I invented. It is somewhat similar to Nurikabe, but it uses a chain of L-trominoes instead of a continuous wall. Example puzzle with solution: Rules: Numbers must be white, and match the size of their white islands. Each white island ...

Many years from now, the Earth and Moon have been clobered by a massive cosmic strike. Humans have survived for centuries in underground hibernation chambers. When they emerge, they find that the Earth is split betweeen the Ant + Bee + Wasp alliance and The Rats. Under the surviving Prime Coordin...

If $f : D \to \Bbb{C}$ is a function, where $D$ is simply connected, what does it mean to say that $f(z)dz$ is either closed or exact? I know what it means for $Pdx + Qdy$ to be exact or closed when everything is real, but what happens when you move over to $\Bbb{C}$?

This is a paradox I'm trying to understand. I'm not tackling relativity yet. I'm still working through Walter Lewin's lectures on electro magnetism. However, I understand base and derived units pretty well and in preparation, there's something that's picking on me. Consider distance (aka length, ...

This is a minesweeper puzzle with a tetromino twist. The goal is to place mines in the grid, following a few constraints. Rules: A number indicates how many adjacent (including diagonally adjacent) cells have mines in them. Mines cannot go in numbered cells. Mines must be grouped into tetromino ...

I just don't see that there is any possible benefit, in the case of presidential elections anyways. I don't think there are many, if any, registered voters who haven't heard of Donald Trump or Joe Biden, so the goal can't be to raise awareness. No need to raise awareness of something everyone i...

I have a vector layer, in which structures (pipes under roads) are made up of multiple lines. I wish to spatially join all the lines that make up a single structure, but cannot figure out a way to do this. I've been messing around with things like "dissolve", but that merges all lines in the laye...

In the book ''The Original Scots Colonists of Early America, 1612-1783'' by David Dobson, published in Baltimore by the Genealogical Publishing Co. in 1984, I find on page 349 it lists an entry for James Wood that reads: Wood, James, Jacobite, tr. 29 June 1716, fr. Liverpool to Jamaica or Va, i...

I've been trying to learn Japanese for a little over a month now which let me finally read this little tag line on a My Hero Academia poster I have 「最高のヒーローに」 Once I looked up the meaning of each Kanji I gathered that is meant something along the lines of "the best of heroes" or just "the best hero.

I know the following method can get the desired result {b-a,c-b,d-c,e-d}: Differences[{a, b, c, d, e}] But I want to know more about how to do this. MovingMap[Subtract, {a, b, c, d, e}, 1] Please provide as many methods as possible.

I'm trying to access a process' stdio streams from outside its parent process. I've found the /proc/[pid]/fd directory, but when I try $ cat /proc/[pid]/fd/1 I get a No such file or device error. I know for certain that it exists, as Dolphin (file explorer) shows it. I also happened to notice th...

In Argentina, it's usually said that the economic burden on employers is very heavy (just an example). So much so that, if it were lifted, more people would become employed, but I don't quite understand how this would work. Employer taxation is one part of the problem, the other part is the "dedu...

I have a question regarding the translation of 1 John 5:16. In the verses below, I have highlighted the translated (added?) words I’m querying. Why does the NIV use ’you’ where the NKJV uses ’he’? [and in the second highlighted word] Why/how is this taken/assumed to be referring to be ‘God’? 1 J...

A force field $F_i(x)$ is conservative if for every curve $C$ from a point $y_1$ to a point $y_2$, we have $\int\limits_C F_i(x)\mathrm{d}x^i$, so that the energy difference between $y_1$ and $y_2$ is independent of the curve taken from one to the other. Equivalently, the integral around a closed...

Previous: Trichain: Introduction Trichain is a new puzzle type I invented. It is somewhat similar to Nurikabe, but it uses a chain of L-trominoes instead of a continuous wall. Example puzzle with solution: Rules: Numbers must be white, and match the size of their white islands. Each white isl...

I have an javascript array in lightning component controller. var networkIds=[]; after some logic I have as follows inside the array "NetworkID":"11320" I want to extract the number "11320" and then store it in attribute of type string. I am doing as follows: var networkid=networkIds[0].split(...

In every text/ physics book that I've read, Protons are mentioned as particles that are bigger, way bigger 2000 times to be precise, than electrons...I believed that until a few minutes ago when I googled "what is the radius of an electron" and then I read somewhere that it was 2.5 times bigger t...

Lets say I have 100 $15 call contracts for NYSE: GPS (Gap Inc) that expires sometime next year. Hypothetically, if the company were to announce a leveraged private buyout of the remaining shares at $30/per share - what would happen to my call contracts? Would I get fairly compensated from my brok...

This is a Trichain puzzle. The rules of Trichain are as follows: Numbers must be white, and match the size of their white islands. Each white island can only contain at most one number. Some white islands may have no numbers. Black squares must be part of L-trominoes. Black L-trominoes cannot b...

I found this sentence in my textbook: 마음에 드는 지갑이 있어 사려고 했는데 가격이 너무 비쌌다. and its translation should be roughly: I intended to buy my favorite wallet, but the price was to high. My question is: what does the 있어 do in the middle of the sentence? Could this be a mistake?

I'm writing articles for a website about music and musical instruments. Usually, our team writes about topics that have already been conceived. But sometimes we can suggest our own topics as well. I have an idea to write about jazz. It is a really huge topic, so I'm thinking about separating it i...

I was hired for my current job (in a very old industry) around 8 months ago specifically to modernize the company's tech stack and also to improve overall tech culture by introducing modern tech stack, development processes etc. based on my experience working with startups. Now, due to COVID-19 r...

for clarity: moved here from stackoverflow after being pointed to Code Review being the better place for this question I love async/await and Promises since I got my hands on them. And I might be overdoing it, but it feels like there should be a good and readable way to utilize async/await to get...

I have a flight from South America to NY on Friday, I planned to stay there for 5 days or so and then I leave to Denmark. However, I just learned about the 14-days quarantine restrictions that are in place. Do you think I may not be allowed to fly out on the specified date?

Our media, no matter which country you live in, is always telling us that hostage taking terorrist can't reach their objective and they will fail. Iranian Embassy Siege failed to reach it's objective, I always and always hear US soldiers saying that hostage takers deserve to die. In Hollywood mov...

I want to explore an advanced Native American civilisation; assume their general 'technology level' is 'equivalent' to 13th-century Europe. Biggest difference is that their metallurgy is lagging behind; this country is only just starting to make use of iron for instruments larger than tuning fork...

A problem that frequently shows up is estimating the mass of the propellant tanks of some hypothetical rocket configuration. This need arises from the important role of the dry mass in a rather famous equation. Two assumptions that are often made: Tankage mass is proportional to propellant mass. ("

Some observations: In a particular society in India, the repentance for consuming beef is that the "sinner" must put on the rope around his/her neck (i.e. the rope wound around a cow's neck) and go for begging by "mooing". Another tribal Hindu society requires providing feast to the society (or...

Fix an integer $i\geq 3$ and a finite abelian group $G$. Is there a connected closed Kähler manifold $M$ such that $H^i(M, \mathbb{Z})\approx \mathbb{Z}^n\oplus G$ for some integer $n\geq 0$?

I've seen a lot of questions about this, but haven't really understood/didn't match my issue. I'm a newbie regarding networking. I got two routers, both are connecting to the wan (giving them different external IP). 192.168.0.1 is a vilfo and 192.168.2.1 is a dlink860l is there anyway to connect ...

A box contains 7 white and 5 black balls. If 3 balls are drawn simultaneously at random, what is the probability that they are not all of the same colour? Calculate the probability of the same event for the case where the balls are drawn in succession with replacement between drawings. Probabilit...

Many articles give examples like this: template<typename T> concept Equal = requires(T a, T b) { { a == b } -> std::same_as<bool>; }; Does it make any difference if I write: template<typename T> concept Equal = requires(T a) { { a == a } -> std::same_as<bool>; }; If it doesn't, why was ...

I have been reading about Focal length and Fast lenses when I came across this lens which has 85mm focal length and F1.4 as FStop. https://www.sony.co.in/electronics/camera-lenses/sel85f14gm Generally lenses with 1.4mm Fstop have focal length below 35mm but here its 85mm!! As we calculate FStop a...

Among six suspects (C, D, G, H, J, T), two worked together to commit a murder. H said C and G did it. J said D and T did it. D said T and C did it. G said H and C did it. C said D and J did it. T refused to say anything. Four of the five suspects that said anything named one person correc...

I've had my front light mounted on the handlebar for the last 4 years or so. I never liked the bulky look and more importantly, how it jumps around in a response to my handlebar movements (if I'm on a rocky road avoiding obstacles and people are walking in front of me, it unnecessarily scares the...

This is a canonical question and answer developed by the community to help address common questions. If you've been directed here, or your question has been closed as a duplicate, please look through the resources here and use them to shape more specific questions. To browse all canonical questio...

The goal of a classifier is to minimize the Error (($F(x)$ - $\hat{F}(x)$)2), where $F(x)$ is unknown function of $x$ and $\hat{F}(x)$ is the predicted function. My question is: if we don't know $F(x)$ for unseen data, how does a decision tree minimize this error? Why do we estimate the error for...

This question here asked if it would be possible to reach the moon within a lifetime for a civilisation starting with "nothing". The answer to that question, quite clearly, is: no way. But it made me think. Given a similar basic experimental setup, how far could a civilisation actually progress w...

I want to make a Bash script executable by the kernel. I have already used the chmod +x command and #!/bin/bash to make it executable and it works, but that I want to do is make it an executable without an interpreter, like an executable from a compiled app. Is there any way I can do this? All I ...

This originated as a question that I encountered while woodworking, but nerdy me had to try and see if there was a solution. Say I have two right triangles, and each of them have the same angles, but one is slightly larger than the other (with the right angle for both at the origin). Arranging ...

I am writing a chess engine. I need to know how to tell if the king is in check. I was thinking that maybe I can use the approach that Stockfish uses. Where and how in Stockfish's code is check detected?

I need a Boolean node that does the following. If the input is true at any time, the output becomes true and stays true. Even if the input is removed or becomes false, the output must stay true. It's like detecting a pulse or touching a button then walking away and the bulb doesn't turn off when ...

I have the following Schrödinger equation in $2D$: \begin{cases} \partial_t \Psi(x,t) = V(x,t) \Psi(x,t) \quad x \in [-10,10]^2\\ \Psi(x,0)=\exp( \frac{1}{2} (-x^2+y^2)) \end{cases} where the potential $V(x,t)=\mathbb{i} \Bigl( \frac{1}{2} \Delta - (x^2+y^2) - \sin^2(t) (x+y) \Bigr)$ with homogen...

In Wang et al. "Predicting New Workload or CPU Performance by Analyzing Public Datasets" (2019), the MAE is measured in a standardized space (Mean=0, SD=1). This is discussed in 3.4 Metrics, page 9. Then right after Figure 6 on page 12, all the MAE references in the paper are presented in percent...

It is being reported that EasyJet expects a heavy loss in the current year due to Covid-19 pandemic. The report states that The airline said it expected to sink into a pre-tax loss of between £815m and £845m in the current financial year, which is worse than analysts' forecasts of a £794m loss. ...

Let $A$ be an abelian group. Are there an algebra $\mathfrak{X}(A)$ s.t. the multiplication group is isomorphic to A ? i.e. $$ \mathfrak{X}(A)^{\times} \simeq A. $$ For example, for $A=\mathbb{Z}/4\mathbb{Z}$, $\mathfrak{X}(A)=\mathbb{F}_{5}$. I want to know the sufficient conditions of $A$ for e...

Certain dictionaries make a point of citing the earliest known written usage of a particular word. Sometimes, after the dictionary is published, someone tracks down an even earlier attestation of the word (which may end up getting cited in the next edition of the dictionary). I seem to recall re...

The standard model, however, failed to explain gravity. Enter string theory to rectify the problem. (From an ACT test) As the bold sentence above, it throws me off when I see a verb lead a sentence: where is the subject?

Not sure if I should post this here or in Stackoverflow since I'm doing something in VBA, but the formula I want to use is just basic Excel: Example I have a number in one of my cells: 1741579193,58 (for English speakers it would probably show (1741579193.58) I want the following format: 1.741.57...

When we consider the Peano axioms minus the induction scheme, we can have strange, but still quite understandable models in which there are "parallel strands" of numbers, as I imagine in the picture below: $\quad\quad\quad$ This mental image makes it at least plausible that induction might not wo...

I was thinking about Air France 447 recently and had a wonder: What would happen if the pilots had re-engaged the autopilot and stopped all stick input? (If that's even possible in a stall condition). I know this has since changed, there is the MCAS system now, which will force a stall recovery. ...

Can someone help find out what is the location of this picture? I tried enabling the ''Tips'' option for the Windows Lock-screen but it still does not work. Thanks, Michaela

I use a shortcode that retrieves the url of woocommerce products and builds a link: function woo_url_shortcode( $atts ) { $atts = shortcode_atts( array( 'id' => null, ), $atts, 'bartag' ); $html = ''; if( intval( $atts['id'] ) > 0 && function_exists( 'wc_get_product' ) ) {...

Someone called me to ask whether I have recharged (added money to) my mobile account. He told me that he was calling from the network provider and wanted to assist me with the recharge. Unlike an automated call that I usually get, this was an actual person who was calling, and I had not even cont...

Is there a function that can create hexagonal grid? We have square grid graph, where we can specify m*n dimensions: GridGraph[{m, n}] We have triangular grid graph (which works only for argument n up to 10 - for unknown reason): GraphData[{"TriangularGrid", n}, "Graph"] I can not find a functio...

When I run :marks it lists all the marks including the standard vim marks. This is somehow distracting. Is there a way to list only my marks that I created using m-X for example?

I do not understand why \restriction (from package amssymb) is defined to be a relation-symbol. It is certainly not one in mathematics... Is there any special reason, or should I just consider it a bug and redefine it using \mathbin?

Nurikabe and Tapa puzzles have the interesting property that the target shading is identical for both: a fully-connected shaded region with no 2-by-2 blocks. The difference is the cluing, so there seems no reason you can't use both Nurikabe and Tapa clues in a single grid to clue a single shaded ...

If ^ matches the beginning of a line and $ matches the end of a line, then why doesn't ^$ match the beginning AND end of a string like the one in the title? How do you make such a regex that matches a string like this: starts with s and ends with s

A newcomer to density functional theory calculations is exposed to jargon which sounds rather non-technical at first. For instance, 'charge density' is something that is actually a term in the formalism, whereas terms like 'ab initio' and 'first principles' seem adjectival. Please help me underst...

Hexabromocyclododecane has 16 possible stereo-isomers. So far so good. I found that: 134237-50-6 is the CAS of alpha-Hexabromocyclododecan 134237-51-7 is the CAS of beta-Hexabromocyclododecan 134237-52-8 is the CAS of gamma-Hexabromocyclododecan 3194-55-6 is the CAS of a mixture of different ...

I have very simple LWC inside Community page. Inside the page I have the following query, which seems to raise Internal Salesforce Error, but I don't understand why This is the query SELECT Survey.Name, CommunityId, CustomField1__c, CustomField2__c, InvitationLink, LastModifiedDat FROM SurveyInvi...

John 3:16, “For God so loved the world that he gave his only (μονογενῆ) Son, so that everyone who believes in him may not perish but may have eternal life." My question resides in the greek term μονογενῆ often translated a only or "only begotten" and which seems to be a significant part of Chri...

I graduated 2 years ago. I am now seeking to apply to a Master’s degree in Finance. I am currently applying to 6 universities. My letters of recommendation are from renowned professors who are really putting time and effort to ensure i get approved in a top program. The thing is I currently have ...

Is it possible that "hard mathematical problems" would be easier in some other axiom systems? Does this make any sense? I was motivated by this question after reading some paper that concerned how the choice of axiom system affects "attainable truths". Thus while some questions may be unanswerabl...

Suppose we have established TCP connection. The active close process assumes the FIN packet been sent to trigger TCP connection closing. But I can't figure out, is this first (active close) FIN packet has only FIN bit set? Or there can be ACK bit or even PSH with some data payload? Thanks in adva...

Is it OK to use this expression in an academic text? The given charts represent ball-park figures of mortality rates in European countries. Is ball-park formal enough to be used in an academic context?

Most of the freelance projects I take on involve working remotely, for a fixed price. I'll then take a deposit before starting work and invoice for the rest on completion. However on occasion I find myself working at clients' offices for a day rate and I find billing a little more tricky. In the ...

I want to ask that Can Quasi-Linear utility functions satisfy the more is better (monotonicity) assumption?

My misunderstanding is all about the parity attack mentioned in "Cryptography Engineering by Ferguson, Schneier and Kohno". Most modern block ciphers have a 128-bit block size, but they operate on 32-bit words. They build the encryption function from many 32-bit operations.This has proved to be ...

I'm trying to make the following two commands of the same width: \newcommand{\Bsh}{\ensuremath{B^{H}_{s}}\xspace} \newcommand{\Bsl}{\ensuremath{B^{L}_{s}}\xspace} in order to avoid these ugly alignment issues: I have tried without any success to use a combination of \smash, \llap, \rlap, \clap,...

Is it possible to simulate the Shift+LMB for hiding a parent object with its children as in the outliner. Now based on this and this I am iterating over the children objects and hide_set(True) them individually: def toggle_hide (list, mode=True): children_list = [] for obj in list: ...

Is there a noun for a man who wrote a best-seller book? Or shall we describe by "this man who wrote a best-seller book"?

Real-life motivation. Our team has $n$ members. For the next in-team presentation session, everyone had 1 talk prepared that he or she would be able to present. Now everyone could cast $1$ vote about whose talk they would like to hear. (Everyone is modest, so no-one voted for their own talk.) Now...

I applied Henry 208 roof patch on my EDPM rubber roof. It looks fine and seems to be holding up, however I'm concerned that it may react with the EDPM chemicals. I have heard this can happen with certain materials, and I'm wondering if I should cut out the patches I did (1x1 foot or so...8 of the...

I've been just scanning through the HF band at night seeing what all I can pick up, and I'm trying to figure out a particular signal. I'm using a VHF discone, which isn't ideal, but it works well enough for simple reception with an RTL-SDR. 22.695mhz. When I tune in the evening (roughly midnight ...

I am taking a course on point set topology so since I take my lecture notes using LaTeX I want a software or application from which I can sets and topological diagrams and import them to LaTeX. For example, how could I create a set like this one using some software online.

A followup to this question: I have booked an itinerary on Turkish Airways travelling from outside the EU to the EU via Istanbul, consisting of four flights, all on the same PNR. Asia-IST IST-EU EU-IST IST-Asia If I'm parsing my Air passenger rights page right, since TK is a non-EU carrier, the...

I was wondering why m below is a legitimate model? If it is, what is the meaning of its random part? ses is a level-1 predictor and sector a level-2 predictor making their combinations a cross-level interaction. In other words, I'm asking how a cross-level interaction can be taken to be random in...

I read this book a while ago and I forgot the name. The cover has a big Ferris wheel on it. The main character is a girl and she lives in a small apartment thing with her mom and her dad and basically there are these aliens that live in the ocean contained in a special camp. Then for some reason ...

According to the rabbinical tradition, there are 8 threads in each side of the Tzitzit. How many threads in the 'Tzitzit' of Karaites?

I have seen Curve25519 and X25519, Curve448 and X448. I've seen a small note in this answer (Historical note: Originally, X25519 was called Curve25519, but now Curve25519 just means the elliptic curve and X25519 means the cryptosystem.) Is it a standard to say CurveABC is the Elliptic Curve an...

I am writing a document dealing with formal grammars, containing numerous examples. I decided to use the lstlisting environment from the listings package over the mathematics align and give example grammars in the following manner \begin{lstlisting} S -> A | B A -> aA | empty B -> b \end{lstlisti...

There were two question about the new Sage Advice: Does Flock of Familiars produce endless wealth in the same manner as Find Familiar? What is a sprite familiar's AC? My answer to one and comment on another is that infinite wealth from a Warlock isn't possible because the Sprite is summoned wit...