Landfills seem like disgusting, nasty places that could be breeding grounds for all sorts of viruses and bacteria. What is the likelihood that the next lethal superbug or virus (like Ebola) could originate there?

I'd appreciate some clarity on this issue as I have heard and seen conflicting answers on this - in viewing various questions on this site as well as instructions in a haggadah. Here's some of what I have seen: The shank bone symbolizes the Pesach sacrifice. However, as there is no Bet Hamikdas...

A creature is on the Material Plane and can perceive someone on the Ethereal Plane using the True Seeing spell. Can that creature cast a spell that only requires that they see the character on the creature in the Ethereal Plane? For example, could someone on the Material Plane that has truesight...

It seems that astrological predictions are trials and error method? Can someone please give some examples that make sense? I have seen many people who are trained to read patris make mistakes which are very basic.

The unit in question is an Elecraft XG3 test signal generator. It puts out anywhere from -107 dBm to 0 dBm. Is it safe to have these signal generators on and transmitting while not connected to anything, or should they always be connected to a 50 ohm load? I want to fire it up for the first ti...

In the following sentence, does もの mean "person" (qualified by 1人あたり) or "thing" (as in "the 費用 thing")。 上記費用は1人あたりのものですか？ For reference, below are the definitions I have for もの: 物 もの (n,uk) thing; object; the natural thing; a frequently done thing; used to express emotional involveme...

I've read about using a static variable from a class in the test class but I'm wondering if this is legal enough to do. @isTest public class myTestClass{ public static Boolean mySwitch = false; public static testMethod void myTestMethod1(){ // code // } public static tes...

I attack with Phantasmal Bear. My opponent responds by casting Ultimate Price and targets my bear. Can I save my creature by casting Snap or Curfew? If I had a regular creature, I know that Curfew would be able to save because I would just return it to my hand and my opponents Ultimate Price woul...

Honestly I don't even know how to ask this, or what are the proper terms lol So what I'm trying to do, is to work on variables with variable names. I think I'd best describe it by actually showing it: So what I had before was this if [ -z ${file_var} ]; then echo "empty argument" fi if...

The obvious solution of Lattitude & Longitude doesn't work because it generates points more densely near the poles, and the other thing I came up with (Pick a random point in the unit cube, if it's in the sphere map it to the surface, and restart if it's outside) doesn't always find a point withi...

Apart from the Animated Shield, is there a way to fight with a shield (given that my character has proficiency with shields), and attacking at distance (I also have proficiency with some ranged weapons). Since ranged weapons are two-handed, it's seems very difficult to have a great defense and a ...

I'm trying to solve and approximate the area between the two graphs. Right now, my functions are stored as f[x_] := 3 Sin[x] g[x_] := x - 1 and then I tried to integrate by evaluating Integrate[Abs[f[x] - g[x]], x] Instead of getting an answer, I just get the exact same thing I inputted In...

I would like to learn the basic theory of unitary representations of finite groups over finite fields. Here, the unitary group $\operatorname{GU}(n,\mathbb{F}_{q^2})$ consists of all invertible transformations of $\mathbb{F}_{q^2}^n$ that preserve the Hermitian form $\langle x, y \rangle = \sum_{...

The mishna in Sotah 3:8 says, in a list of differences in halacha between men and women: A man is sold for his theft [i.e., to repay it], a woman is not sold for her theft. (Sefaria translation) The clarification that the sale is for repayment comes from the g'mara, which doesn't elaborate...

What is the name of the early to mid-1950's sci-fi short story in which an asteroid miner and his wife decide to have their pretty, intelligent daughter dumbed down and made less attractive?

I have the following code: a = [0,1,2,3] for a[-1] in a: print(a[-1]) The output is: 0,1,2,2 I'm confused about why a list index can be used as an indexing variable in a for a loop?

I'm using the requirePermission tag in the templates for my Craft multisite. I only want users who have access to 'edit' that site be able to view it. My code is: {% requirePermission('editSite: (currentSite.id)') %} It works fine when logged in as admin, however it returns a 403 for every o...

I read a sci-fi story in a collection of shorts about 10 years ago, I believe they were stories from 70s possibly and have been trying to track down the title. My recollection is that a number of ships encountered problems with a black hole or similar timey-wimey space object, and the ship belon...

Often I am dealing with an integral of let's say: $$\int\frac{dt}{(t-2)(t+3)}$$ or $$\int \frac{dt}{t(t-4)}$$ or to make this a more general case in which I am interested the most: $$\int \frac{dt}{(t+\alpha)(t+\beta)} \quad \quad \alpha, \beta \in \mathbb{R}$$ Basically any integral with d...

I would like to translate this sentence: In order to compensate the deviation of the actual from the requested output current, the input voltage must be adjusted. I would try as follows: 実際の出力電流の指令された電流からの逸脱を補正するには、入力電圧を適応させることが必要です。 I think it is correct. However, the expression "実際の出力電流の指令さ...

I want to add class in ko template In js: define([ 'jquery', 'ko', 'uiComponent', 'underscore', 'mage/translate', 'mage/storage', 'Magento_Checkout/js/model/url-builder', 'Magento_Customer/js/model/customer', 'Magento_Chec...

Simply put, rural US districts tend to be more conservative so tend to vote Republican. And rejection of climate change theory has been a bedrock of Republican politics for years by now. If one assumes* that we are seeing early signs of persistent changes in weather pattern, then farmers, who p...

What force causes entropy to increase? I realize that the second law of thermodynamics requires the entropy of a system to increase over time. For example, gas stored in a canister, if opened inside a vacuum chamber, will expand to fill the chamber. But I’m not clear on what force, exactly, ...

In Crazy Rich Asians (2018), before she eats lunch at Nick Young's residence, Peik picks a cocktail dress out of her car trunk: Rachel: You have a cocktail dress in your trunk? Peik: I'm not an animal, Rachel. Why did Peik say, "I'm not an animal"?

Previously a member @Evan Chen, wrote this script : #!/bin/bash while [ true ] do currentoutput="$(lsusb)" if [ "$currentoutput" != "$lastoutput" ] then echo "" date and Time >> test.log date +%x_r >> test.log lastoutput="$(lsusb)" lsusb >> test.log ...

In the news they say that Israel hoped to become the fourth country to land a spacecraft on the Moon. Only government space agencies from the former Soviet Union, the US and China have made successful Moon landings. E.g. haaretz, BBC Why they don't mention the Indian Chandrayaan-1? The B...

This code for the first five iterations the speed is okay , but after that the speed is very slow, I cannot understand what is wrong with this? Would you please help me fix it? Clear[A, r, x, s, e] s := 0.3405 e := 1.6539*10^-21 u[0] := 0. u[1] := 0.1 A[r_] := A[r] = Piecewise[{{r - 2.5 s ...

I live on a 2.5 acre lot. I installed a ground mount solar array 6 years ago. Then 4 years later my neighbor planted iver 39 tall cypress trees which are blocking the sunlight. Is there any law in Maryland that protects the solar owner

In a comment on this answer to my previous question about tail-mounted airbrakes (lack of), @JohnK states: You won't see flight spoilers (speed brakes) being used to steepen approaches. You have to be 10kt above Vref to extend them on a CRJ900 and you shouldn't be that hot in the first place,...

This Wikipedia page says the following: Most x86 processors since the Intel 80486 have had these x87 instructions implemented in the main CPU So the above quote means that some CPUs that were realeased after the Intel 80486 CPU did not have the x87 floating-point unit built in. But what ...

I am pretty new to C++17 and am attempting to understand the decltype keyword and how it pairs with auto. Below is a snippet of code that produces an unexpected result. #include <typeinfo> #include <iostream> #include <algorithm> using namespace std; int main() { int16_t mid = 4; auto lo...

As I transition to faculty, I have increasingly gotten requests from people who want to do PhD's with me or want postdocs in my lab. Often these emails are extremely generic and don't suggest they know anything about my research. The descriptions of themselves suggests they've mostly studied co...

Continuing https://math.meta.stackexchange.com/a/22167/, as far as I understand, all the four of ℕ, \mathbb{N}, \BbbN, \symbb{N} work now, and \BbbN is advised against. Is there any reasonably default context (e.g., a self-constructed context that would redefine these macros and symbols wouldn't...

In Liang Qichaos 新民說 there is the chapter 公德，wherein he cauterises the ostensible tendency of the Chinese to disregard collective virtue (公德）and only cultivate personal virtue(私德）. 那些只顾自己闷头做好人的人，强调自己虽然没为集体带来利益，但也没带来祸害。这是什么话？难道不知道对集体没好处的人就是有坏处的人吗？为啥这样说呢？因为集体能给我带来利益，而我却不能给集体带来利益，这就等于是我白沾集体的光，丝毫...

Background At my work, we have a schedule option where you get every other Friday off. It is the standard schedule all new hires are given. Today, my manager implied that I need to go into work this Friday with the phrase "If you need me I'll probably be working from home tomorrow". But she ne...

It's impressive how many different vector file formats QGIS (using ver 3.6.0) allows me to save a layer as: But as far as I can tell, QGIS doesn't allow me to save a vector layer to memory. In my normal workflow in manipulating vector layers, I find myself having to save several intermediate v...

I am a third year PhD student in an area of theoretical CS that would like advice for a difficult situation with my advisor. My advisor is not involved in my research projects at all. In particular, I have come up with all of my paper ideas, and have executed the papers alone. However, she alway...

I'm currently reading through the Lost Mine of Phandelver adventure. In the scenario, the PCs can encounter a familiar: If the PCs are suspicious about this rat, they may try to attack it or even try to get information about its master if they suspect it to be a familiar. Is there any way fo...

Today, running apt in all my machines gives this error with the Google PPA (for google-chrome): me@mymachine:~$ sudo apt clean && sudo apt update && sudo apt full-upgrade -y && sudo apt autoremove -y && sudo apt autoclean -y && sudo snap refresh [sudo] password for me: Ign:1 http://dl.google.c...

When a magazine subscription is about to expire the publisher sends a notification to the subscriber. The notification is usually sent a month before expiration, however this value varies based on the subscriber profile. Is there an English word to describe this value?

In the comments for this question a dispute around around the question of "Have Newtonian Mechanics been falsified?" That's a bit of a vague question, so attempting to narrow it a bit: Are any of Newton's three laws considered to be 'falsified theories' by any 'working physicists'? If so, wh...

I use global temporary tables for easy integration testing of my SQL Server backed application. But the function min_active_rowversion does not seem to include global temporary tables, like seen here: using (var connection = new SqlConnection("data source=.;Integrated Security=True")) { co...

I got an interview call from a company after a friend referred me for a vacancy in his team. The call was from team manager and not any HR personal. One interview for upcoming week was scheduled. Since my current employer does not support WFH (Work From home), I scheduled the interview for mornin...

Does the UK Parliament have to approve the new Brexit extension till 31-Oct-2019? If Parliament does not approve it, or does not do so before 11 pm, would that result in a no-deal Brexit tonight? I am asking because the Institute for Government previously said this about the EU Withdrawal No....

My book jumps from $$\frac{\partial f}{\partial x}(x, g(x)) + \frac{\partial f}{\partial y}(x, g(x))g'(x) = 0 $$ to $$\frac{\partial^2 f}{\partial x^2}(x, g(x)) + 2 \cdot \frac{\partial f}{\partial x \partial y} (x, g(x))g'(x) + \frac{\partial^2 f}{\partial y^2}(x, g(x))(g'(x))^2 + \frac{\part...

Given a unit sphere (radius 1), I would like to know how many cones I can pack into this unit sphere. Restrictions: The top of the cone needs to be in the center of origin. The bottom of the cone needs to form a circle on the unit sphere. I have found a related question, but with a cube: Packin...

I say hello, I say goodbye One moment I'm low, the next I am high I can make you see something you did not see The invisible can be seen through me. What am I?

According to data provided publicly by GitHub, Bouman made 2,410 contributions to the over 900,000 lines of code required to create the first-of-its-kind black hole image, or 0.26 per cent. Bouman’s contributions also occurred toward the end of the work on the code.In contrast, contributor A...

I read this short story maybe about 5-7 years ago, possibly longer. I'm fairly certain it was part of an anthology. It stuck in my mind because I haven't run across that many Christmas horror stories. A woman and her family go to pick out a Christmas tree. They go to the same place every yea...

I have found a 1954 paper in J. Am. Chem. Soc. which gives various temperatures in degrees but does not specify units. A snippet of the introduction is: Titanium reacts appreciably with fluorine above 150°… If I were feeling charitable, I might excuse the "units are for wimps" attitude as...

Somebody took my things without asking me, without my knowledge and didn't return them back to me. Is 'stolen' word appropriate to represent this situation? (e.g. He stole my things.) If not, what would be the proper word?

I stumble across a weird behaviour today. After adding a user to a new group like so : # gpasswd -a test myuser then connecting to a new bash session, here are the result for groups and groups myuser: myuser@mycomputer$ groups wheel myuser myuser@mycomputer$ groups myuser wheel myuser test ...

If i have to solve $x^2-2x-3<0$ I would do $$x+1 < 0, \quad x-3<0$$ and end up getting $x<-1$ and $x<3$. Why is it wrong to use the same inequality sign? Shouldn’t both of the linear equations formed from factorising the quadratic use the same inequality sign as the quadratic?

Since this morning I have this error Err :18 http://dl.google.com/linux/chrome/deb stable Release.gpg The following signatures are not valid : KEYEXPIRED 1555048520 KEYEXPIRED 1555048520 KEYEXPIRED 1555048520 KEYEXPIRED 1555048520 when I'm running sudo apt-get update -y I sea...

I did the following question.(I have seen such a question on Physics SE but my doubt is a bit different). An 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000N , calculate the acceleration of the train. For finding t...

How to remove 255 characters limit from meta keywords field in product in admin while saving or updating existing ?

For example: "Cautious is just a _________ for being scared." "Opportunistic is just a _________ for being inconsiderate." "Not too bright is just a _________ for being dumb." "Simple is just a _________ for being ignorant. The word is used often in politics to expose someone as being partia...

I have been one of the co-author of a published paper 8 years ago. In that years I was an undergrad student. So, I had no significant scientific contribution to this paper. I have just finished my Ph.D. and I do not want this paper listed in my publications. Is it possible to remove my name from...

I've tought myself to read the Greek alphabet, and it is still confusing to read and identify "h" sound in the ancient Greek. For example, Athena talks about Circe that she has "αἱμύλιοι λόγοι" in Odyssey(1, 56). It seems 'aimylioi logoi' to me, because α has no diacritical mark on, but I have se...

Background: "experienced" Pascal-programmer (DOS-era) proud owner of Mathematica ver 11.2 have used Mathematica for years to do my share of number crunching and plotting to produce material for my university courses (as well as for Math.SE :-) Next task: I need to add a few things to my Math...

I tried to print labels with UTF-8 input. I have read, that this requires xetex. So I wrote the following example to write 1€ in the four corners of a 102mm x 152mm label: \pdfpagewidth=102mm \pdfpageheight=152mm \hsize=\pdfpagewidth \vsize=\pdfpageheight \advance\hoffset by -1in \advance\voff...

I recently read this guide posted in the Unity website about Resources. It is clear from the get-go that it is discouraged to use Resources unless you are prototyping something. My game is like a 2D RPG, and it has over five thousand monster sprites (yes, a lot). As far as I'm concerned, it make...

I am traveling to France for 4 days on a Business Event and following that am going on a Vacation Trip to Iceland where I will be staying for 11 days and 10 nights. As per my knowledge, I can send my visa application to either France consulate (as main purpose is Business and port of entry to ...

Consider the following simple struct: struct A { float data[16]; }; My question is: Assuming a platform where float is a 32-bit IEEE754 floating point number (if that matters at all), does the C++ standard guarantee the expected memory layout for struct A? If not, what does it guarantee a...

Let $\mathcal{O}$ be an operad in the monoidal category $M$. Then $\mathcal{O}(1)$ together with the morphisms $$\mathcal{O}(1)\otimes \mathcal{O}(1)\to \mathcal{O}(1)$$ and the unit $\eta:1\to \mathcal{O}(1)$ is a monoid object. Moreover, a morphism $\varphi:\mathcal{O}\to \mathcal{O}'$ of opera...

In The Lego Movie (2014), it seems to be a running gag that the in-world TV show "Where are my Pants?" consists solely of the main (pantsless) character asking his wife "Honey, where are my pants?" in every episode, with the 'pants' part drawn out comically. In the later part of the movie (after ...

My wife and I are currently househunting and have, as part of this process, had a preliminary meeting with a mortgage adviser. They asked all the expected questions about finances to see what our monthly payments would be and how much we can afford. I have a pretty good spreadsheet for calculati...

I came to Czech Republic to study and recently found a job. I have applied for a work permit and my application is received. Now, I am waiting for my work permit. I have a contract signed by both parties (me, and the company) stating that I will start working as soon as I receive my work permit....

I came across the orbital data for a low Earth orbit spacecraft and one thing which I am not able to understand is why does its Right Ascension of ascending node and Argument of Perigee keep changing every day. Firstly, it seems extremely unrealistic to me, that they are being changed by manoeuv...

I'm working with a dataset with a number of potential predictors like : Age : continuous Number of children : discrete and numerical Marital Situation : Categorical ( Married/Single/Divorced.. ) Id_User : Categorical ( an id of the user who conducted the first interview with this person ) I'...

I want to produce a table (or a grid) from my list of data, as follows: eq01={0.01,1.02}; ev01={{1,3},{2,4}}; ev02={{5,5},{6,1}}; data1 = {{"", "Equilibrium points", "Eigenvalues", "Eigenvectors"}, {"A = 0",eq01,ev01,ev02}}; Grid[data1, Alignment -> Left, Spacings -> {2, 1}, Frame -> All,...

Inspired by this chat mini-challenge. Given a string as input (ASCII printable characters only), output the string with the letters "raining" down. Each letter must be a random number of lines downward (random between 0 and the length of the string, each having non-zero probability), and only on...

How does the hydraulic lift not violate the Law of Conservation of energy? Suppose I apply some force on one side of Hydraulic lift where area is less, and the fluid in the lift raises some heavier object on the other side where area is more, Now work done is $Force\times displacement$ and d...

Your task is to make a program that takes in an integer n, and outputs the roll of a single n-sided die. However, this dice follows the rules for exploding dice. When you roll the die, check what value you rolled. If you got the maximum for that kind of die (on a standard d4 that would be 4, or ...

I am thinking of a planet (i suppose one would call it a parallel earth) where the industrial revolution never happens, and people live with 1700s technology for ever. What differences in resources/weather/environment/available land area could ensure that it doesn't happen, and what impact would ...

Here are two sentences: Once he got the passport, he went to the Chinese consulate in Toronto and applied for a visa. Once he got the passport, he went to the Chinese consulate in Toronto to apply for a visa. Are the two sentences grammatical, and do they sound natural? If they are both fine...

I had finished migrating contacts from an old system to SalesForce, and upon having the data load checked, I got reports that the count of contacts was very low. The users were using the search this list on the list view for the contacts. When searching for 'Phoenix' (1), for example, only 7 re...

So I'm learning Illustrator but when I try to use the type tool and write for example a long text, this will happen, type tool won't automatically adapt with the text length and the same thing happens if I wrote one letter, the selection would be much larger than the letter so I have to adjust i...

It was a comicbook series about fantasy creatures published in the 80s or 90s definitely not online since I was a kid and Internet didn't existed to me. The graphic style was European (bande dessinée) or American. These creatures were bare chested, or wore light clothes, because I remember them ...

I work at a small company of about 20 people. We have the owner/president, 2-3 managers (depending on how you look at it), and the rest of the people are employees. I'm one of the managers. Each day we have a meeting to discuss what will happen during the day, but not everyone is there for each ...

In the new version of the Artificer UA Artificer class one of the specializations is Alchemist. The alchemist gets the ability to create an Alchemical Homunculus. The description has a section on actions in combat In combat, the homunculus shares your initiative count, but it takes its turn...

I'm playing in a dnd 5e campaign with a bard and a wizard. Our most recent session ended while we were in the middle of exploring a dungeon. The DM informed us that we leveled up from 4 to 5. The wizard and bard were excited to get level three spell slots for the first time. They began discussi...

I recently started electronics as my hobby. I'm working on this v/oct modular synth and in the schematic that I was working on, it did not make sence to me when all the Vcc and Vee are connected to the "GND". In my understanding, Vcc is the positive one and Vee is negative, and should not be mixe...

Suppose we have a function $f(x)$ that satisfies: $$\lim_{x\to\infty}f(x)=L$$ Where $L\in\mathbb{R}$. Is this true? $$\lim_{x\to\infty}f'(x)=0$$ My approach was simply this: $$\lim_{x\to\infty}f(x)=\lim_{x\to\infty}\frac{xf(x)}{x}=L$$ And applying L'Hospital's rule we have: $$\lim_{x\to\infty...

Just a quick puzzle I just thought up. (so apologies if this has already been done) Here's numbers 1 to 5 in a sequence: 5-4-1-3-2 I now want to add the number 6 into the sequence, but where should I place it? What should the new number sequence be, and why? p.s. title isn't a clue

Im in grade 9, and Ive been thinking this for a while now. I don't understand and this is related to a question I got on what the highest number 11 can be divided by. So is infinite a number and is it the highest number 11 can divide it by?

A recent question on tuning saxophones caused me to wonder on the variety of transposing instruments. C - Non-transposing or by whole octaves. At concert pitch - too many to mention. Octave above - piccolo. Octave below - double bass and double bassoon. Also guitar and bass guitar. D♭ ...

I'm pretty new to D&D and have a question. I am currently playing as a rogue swashbuckler (lvl 3) which encourages dual wielding. I love this mechanic and enjoy playing it so far but I'm confused about the bonus action part of it. I understand you don't add bonuses in most circumstances to the of...

When I buy steaks, sometimes they include a padding in the packaging, on which the steak sits, which contains a red substance: What is it? What is its purpose, and can I assume, that it is not poisonous? I unintentionally cut into this one and it had some contact with the steak.

in python is there a way to create of list that will skip numbers and will continue after skipping? something like the following code: x = [1...3, 6...10] print(x) # [1,2,3,6,7,8,9,10] Well its easy to write a for loop and then skip each defined index/value, or i can just use range, what I am ...

DEC, and at least some of their computers, especially those in the 18-bit family and 12-bit family, had these opr instructions, which contained many bitfields which encoded something like "subinstructions". Things like clear the accumulator increment the accumulator rotate the accumulator one p...

Let's say I have $100 in short term capital gains this year. I will need to pay taxes on this gains at the my ordinary tax rate (which we shall assume is 37%). Let's also say there is a stock that has a dividend in December. It's $1000 stock and the dividend amount is $10. Let's also assume this...

I have both Sales Cloud and Marketing Cloud connected and use data shared for a Journey when new records are created. In my object that is triggered in the journey I have a Date/Time field which gets stored in SC in UTC, however in MC timezone settings are not stored in the field. This means wh...

Think of this alien life form as something resembling earth bats, placed in a planet with Earth-like conditions. Micro-bats have small and poorly developed eyes. Similarly, this alien species is completely blind, with the only exception that they can detect ultraviolet in low levels. They make ...

This is inspired by a few things that have been breaking my immersion when reading Worm. The main protagonist is a teen, and most chapters are first-person POV, so grammatical casualness fits. I don't expect her to use subjunctive, and her use of "anyways" was (I thought) a great way to indicat...

I'm referring to Picard, Riker, Data, Worf, Geordi, Dr. Crusher, Wesley Crusher, Chief O'Brien and family, Deanna Troi, Guinan. I know Picard and Worf show up on DS9, though I haven't seen it myself. I'm curious what happened to the characters after that last episode of TNG?

I've been reading Ralph Denyer's book, The Guitar Handbook, and in the section on intervals he states that the perfect fourth can be either consonant or dissonant but it's not explained as how or why. Can someone shed some light on this topic for me and help me understand what is being said here?

0 So I have been practicing competitive coding for a while now and am using codeforces.com for the same. I recently encountered a problem called "One Dimensional Japanese Crossward" on that site ( https://codeforces.com/problemset/problem/721/A ). After lots of tries and lots of fails, I was fin...

If was reading a research article on quantum computing, and didn't understand the tensor notations for the unitary operations. The article defined two controlled gates. Let $U_{2^m}$ be a $2^m \times 2^m$ unitary matrix, $I_{2^m}$ be a $2^m \times 2^m$ identity matrix. Then, controlled gates $C_...

I would like to remove the highlighted wall on the second floor of my house in order to create a loft area. Please help me identify if I'm dealing with a load bearing wall.

Some base points: Python method calls are "expensive" due to its interpreted nature. In theory, if your code is simple enough breaking down Python code has negative impact besides readability and reuse (which is a big gain for devs, not so much for user). Single Responsibility Principle keeps c...

I need to solve $Ax=b$ in lots of ways using QR decomposition. $$A = \begin{bmatrix} 1 & 1 \\ -1 & 1 \\ 1 & 2 \end{bmatrix}, b = \begin{bmatrix} 1 \\ 0 \\ 1 \end{bmatrix}$$ This is an overdetermined system. That is, it has more equations than needed for a unique so...

I remember watching a documentary some time ago and at one point they were talking how empires were limited to a certain size since there was no way to communicate across the empire fast and reliably. The best method they had was courier by horse and to that was a limited size, also empires in Am...

I have a sine wave of 100 mV and 50 Hz. I want to design a circuit that converts this sine wave into a square wave as shown in a figure.

Page 8 of the B codex of Unearthed Arcana says: Although they are constructs, they have much in common with living creatures, including emotions and social bonds, and perhaps even souls. This last part troubles me however. Do warforged canonically have souls?

If my laptop is plugged in I want closing the lid to automatically lock the computer, without putting it to sleep. I don't see an option to do this in Power Options: Is there a hack to achieve this?

I wasn't sure if this question landed in finance, legal or workplace, but the end question is about when/if to engage legal representation. Summary: For decades I had my student loans paid by automated payment from my bank without a problem; just take it out of my bank and there's a small benefi...

I'm new here and I only recently started to use LaTeX. This is what I'm trying to achieve: Notice the vertical lines and the oblique lines. Vertical lines represent headedness. This is what I'm able to do: This is the code: \documentclass[12pt]{article} \usepackage[usenames]{color} %use...

How can we do it just by looking at the image. But I heard in news saying "Einstein was right! black hole image confirms GTR. The image is so less detailed that I can't even make some pretty good points. Please correct me if I'm wrong on any aspect. Please provide a link if this question sounds...

For some reason, when I create new update packages (release build in VS), the update packages are not removing old items. Where I've noticed this specifically is with templates. Example: Before updates: Email Form (template) has an "Email Validation" group containing a field called "Banned Doma...

Say I have a chord progression in C major: I V vi C G Am When I play each of these chords can I potentially play the scale of each chord over it? So for C I'd play C major, for G I'd play G major, for Am I'd play A minor scale. I'm thinking this is possible because secondary dominants work thi...

Does Parliament hold absolute power in the UK? What I mean by absolute power is: presumably they can make illegal or legal whatever they want. Even going so far as to disenfranchise their own electorate. Is this correct, or are there any checks on the power of Parliament?

I'd like to draw the Chomsky hierarchy using tikz, similar to: I have the following so far, for a subset of the hierarchy: \documentclass[11pt]{article} \usepackage{tikz} \usetikzlibrary{shapes,arrows,calc} % ---------- \begin{document} \begin{tikzpicture} \tikzstyle{venn} = [ell...

I generally use PowerPoint for outlining my scenes (prose, not script). I put a general description of what the scene is on the slide, and then give more details in the notes section. I like that I can see all the scenes and the flow of the story in the slide sorter view. I can then easily move s...

I'm talking in the context of guitar amps, but I assume that this question is relevant for any type of audio amplifier. Very often in amplifier schematics I see two stages of amplification -- first, the signal is amplified a smaller amount by a preamp circuit and then amplified again by a power ...

Two python objects have the same id but "is" operation returns false as shown below: a = np.arange(12).reshape(2, -1) c = a.reshape(12, 1) print("id(c.data)", id(c.data)) print("id(a.data)", id(a.data)) print(c.data is a.data) print(id(c.data) == id(a.data)) Here is the actual output: id(c.d...

I want to create a symlink ~/.pm2/logs -> /opt/myapp/log When I run ln -sFf /opt/myapp/log ~/.pm2/logs I get a symlink ~/.pm2/logs/log -> /opt/myapp/log which is not what I want. I'd prefer a POSIX-compatible solution if possible.

Is there a way to store metadata in a cell in such a way that it can be accessed with Dynamic? Think of e.g. how ExternalLanguage cells work. We can select whether they should use Python or NodeJS and this state is permanently stored in the CellEvaluationLanguage cell option. The cell express...

My question below is my attempt to reduce a problem I am having to the simplest possible version that will show the error I am trying to fix. I recognize that the coding looks tortured, and I will provide at the end an explanation for why I am doing it this way, but hopefully we can just focus on...

Having a single rusted key allows you to open rusty lockboxes, but will usually give you white items. Having more of them increases your chances at green or even red items, but I don't know at what rate. Testing a run with 1 key, I got 5 white items in a row, while i got 5 red items in a row on a...

Spacing around subscripts within strings seems to work well: But the spacing around sub-subscripts does not: I did not manually add that space after the 2. How can this be fixed? Thanks!

As far as I know and have checked a few dictionaries and done some research, spoke is either a verb, past tense of speak, or a noun which has a few meanings such as the metal bars on a bicycle wheel; plus a few other meanings that are less frequently used. However none of them make sense in the f...

My body leaves; my core can stay, Where I shall breathe another way. The route of south I always linger. My arms have arms; my ring no finger. What am I?

On my CentOS 7.6, I have created a folder (called many_files) with 3,000,000 files, by running: for i in {1..3000000}; do echo $i>$i; done; I am using the command find to write the information about files in this directory into a file. This works surprisingly fast: $ time find many_files -pr...

The video below is entitled "The Power of the Pentatonic Scale". And from the video you'd think that people are inherently tuned to the pentatonic scale. But I was wondering if they're really inherently tuned or did Bobby tune them? Could they have just been easily tuned to the major scale (or ev...

This question reminded me of a very vaguely recalled short story, most likely from the early '00s or '90s (and probably in a magazine like F&SF, Asimov's or Analog), of a space ship that can easily travel incredibly far, galaxies clusters away, in some far future when humans commonly can and do p...

Several months ago, I sent a paper to a journal (Transport Reviews). Today, I got back a_single_review_, from one reviewer, with comments from the editor that are a sad summary of that reviewers comments. The reviewer clearly wrote the review in a rush (stream-of-conciousness, mispellings, senten...

When and how are pardons supposed to be used? Why does the Constitution even grant the president the power to pardon? Can it be used to pardon any crime? On the surface, it seems to make the president above the law. CNN just reported that president Trump promised to pardon the head of CBP if he...