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12:06 AM
3
Q: Does the Pi 4 resolve the Ethernet+USB bottleneck issue of past versions?

WolfThe Pi 3 (and previous models) had an issue of bottlenecked bandwidth when using Ethernet and USB simultaneously. Is this resolved in the Pi 4?

 
5
Q: Who are these Discworld wizards from this picture?

sidI haven't read many of the novels about wizards yet and would like to know who they are.

 
12:34 AM
2
Q: Where can I get macOS Catalina Beta version?

Roshan I have a MacBook Pro which came with macOS Mojave pre-installed. I have heard that macOS Catalina is releasing this fall. I want to use the beta version of it. Where can I get it?

 
RPG
11
Q: Which resurrection spells are valid to use with the Zealot's 'Warrior of the Gods' Feature?

XiremaIntroduced in Xanathar's Guide to Everything is the Barbarian Path, Path of the Zealot, which among other things, provides a feature called "Warrior of the Gods" that makes revival of this character far easier than for other characters: At 3rd level, your soul is marked for endless battle. If...

 
4
Q: Anatomically Correct Giant Spider

DingaDingaDingaFantasy and folklore has many instances of giant spiders,ranging from creatures like the J'ba Fofi to Aragog from Harry Potter. My question intends to ask whether a creature like the J'ba Fofi could have evolved. On a planet with conditions identical to Earth, how could a giant spider with a ...

 
5
Q: Should I share with a new service provider a bill from its competitor?

ShieldOfSalvationI understand the new service provider is probably looking to make sure they match the services and value my company is currently getting from their competitor, but should I share an old bill with them for this purpose? They've asked for an old bill. Yes, I am looking to replace the relationship w...

 
3
Q: How do Hassidim survive the summer heat?

AryehOn a recent visit to a desert town in Israel, where summer temperatures reach 100 degrees Fahrenheit and over, I wondered about a large Hassidic community that reside there and their firm style of dress. How do Hassidic men, dressed in long, black jackets and other layers, maintain their healt...

 
TeX
12:50 AM
3
Q: Automatically convert a number to use the correct SI unit prefix

N3buchadnezzarSay one is talking about numbers 10^6, 10^7, 10^8, 10^9 and so forth one can also write them as 1M, 10M, 100M,1G, with their corresponding SI unit prefixes. Is there a way to convert a number on the form 10000000... 1E6 1E-6 -100000... To a number with SI unit prefixes automatically? ...

 
3
Q: Attempt to de-reference a null object: list initialization

MichaelLev19I initialize the list at the beginning of the code. In one of the methods, I add values ​​to it. In another method, the list is already empty. But I need these values ​​in the second method. How to save them to get after? public static List<String> listsIds = new List<String>(); @AuraEnabled pu...

 
GIS
2
Q: GeoDatabase (GDB) import not working (QGIS3)

MAPI have a *.gdb which I normaly could load in QGIS version (3.4 / 3.8) following that instructions (or symply drag'n'dop): Installing File Geodatabase (*.gdb) support in QGIS? But it returns a error: Invalid Data Source: [...] is not a valid or recognized data source. I also tryed ogr2ogr to t...

 
RPG
8
Q: Are there any features that help with the roll to avoid the destruction of a Wand of Fireballs when using the last charge?

SdjzThe Wand of Fireballs (as well as several other magic items that have charges1) has a chance of the item being lost forever when the last charge is expended: If you expend the wand's last charge, roll a d20. On a 1, the wand crumbles into ashes and is destroyed. I am looking for ways to inf...

11
Q: What's the easiest way for a whole party to be able to communicate with a creature that doesn't know Common?

PyritieMy party befriended a Faerie Dragon who is now tagging along with us, but only one of us (a Dragonborn) is able to communicate with it. According to the MM, faerie dragons only know Draconic and Sylvan, and none of us know Sylvan either. Instead of having to ask the Dragonborn to translate every...

 
2
Q: Convergenge or divergence of series with e

Un Chico MásI can't find the convergence or divergence of the following series by using aspect ratio test or comparison test. The series is: $$ \sum_{n=1}^\infty e^{-n^{2}}$$ Thanks.

 
3
Q: Understanding Lasso Regression's sparsity geometrically

Mr.Sh4nnonWhenever someone writes about Lasso and Ridge Regression thy draw this diagram with the circle or with the diamond. In the case of the diamond (Lasso regression) it is then always stated that Lasso forces one of the coefficients to 0. Therefor it introduces sparsity. I understand it somehow, b...

 
1:08 AM
1
Q: Meaning of もてり and use of が

Alberto Andrade白き布 もて盤上を 磨きたり 人は心に 鏡をもてり。 Is もてり 持てる? If so, in that case why does a potential verb have the が particle?

 
DIY
1:20 AM
2
Q: How can I reduce the sound of rain on a range hood vent?

Jo ContrerasWe recently had our kitchen remodeled and that included adding a microwave over the stove. The contractor vented the microwave/range fan above the unit through a cabinet up through the attic to the outside. The problem is that every time it rains the sound of the rain hitting the vent tube is so ...

 
1:54 AM
3
Q: What is the name of this OOB notification method/popup, and is it customizable?

Brent BowDoes anyone know the name of the below component, and whether/how it can be used programmatically for custom implementations? It would be very useful to notify our internal users of new custom features that our development team is releasing. I noticed Salesforce is using a notification method i...

 
CS
3
Q: Can the UK Prime Minister immediately withdraw the country from the EU without backing from parliament?

Chris ClaytonCan the UK Prime Minister immediately withdraw the country from the EU without backing from parliament? I am not asking if this is legal, or if it is possible to do without committing political suicide. Let us assume that the next Prime Minister might be so zealous about Brexit that they would b...

 
3
Q: How can a valley surrounded by mountains be fertile and rainy?

MindwinWe all know about Rain Shadow - And if you don't now you do - and that the inner side of a mountain as compared to the ocean would be drier. Now a worldbuiding problem going around that phenomenon. Imagine a large and wide valley (several dozens of miles wide in all directions) surrounded by tal...

 
2:08 AM
4
Q: Can a Federation colony become a member world?

Robert ColumbiaIn various incarnations of Star Trek, we observe the Federation founding and maintaining numerous colony worlds. These worlds are typically (though not exclusively) inhabited by humans, have a relatively low population (for example, New Providence had less than a thousand inhabitants), and typica...

 
2:20 AM
5
Q: When are digital copies of Switch games made available to play?

GendoIkariWhen an upcoming game has a release date set, it is my understanding that you will be able to play that game (the digital copy) at midnight the night before; as soon as it actually becomes date of the release. How does this work with time zones? Do games release at midnight for a specific time z...

 
2
Q: Question on oracles

BlackHat18If our input $x \in \{0, 1\}^{n}$ is given as a black box, we usually query an oracle as follows. $$O_{x}|i, b \rangle = (-1)^{b x_{i}} |i, b \rangle$$ $i = \{1, 2, \cdots, n \}$ is the index of the input we are querying. $x_{i}$ is the value at that index. $b = \{0, 1\}$ is an arbitrary Boolea...

 
2:49 AM
3
Q: Why do the keys in the circle of fifths have the pattern of accidentals that they do?

VityouI'm attempting to fully understand the circle of fifths, and I noticed that in the clockwise direction, the sharps are added in their own circle of fifths starting at F. I'm wondering why this pattern appears; I've tried looking at a piano and seeing if there is any special change in the pattern...

 
3
Q: Making an Email Address Validator

ClydeTheGhostI wanted to make a simple email address validator using StringMatchQ. This was my first attempt: simplifiedEmailPattern = StringExpression[ Repeated[ WordCharacter | "-" | "_" | "." | "+", {1, 255} ], Verbatim["@"], StringExpression[ LetterCharacter, ...

 
4
Q: How did installing this RPM create a file?

PascalRunning yum install https://extras.getpagespeed.com/redhat/7/noarch/RPMS/getpagespeed-extras-release-7-1.el7.gps.noarch.rpm creates /etc/cron.d/sysstat2 but RPM disavows the file: # rpm -ql getpagespeed-extras-release /etc/pki/rpm-gpg/RPM-GPG-KEY-GETPAGESPEED /etc/yum.repos.d/getpagespeed-extras...

 
RPG
5
Q: What is the highest number of sneak attacks that a Pure/High Level Rogue (Level 17+) can make in one round?

KelvintheWizardRogues only get one sneak attack per turn. Which means that they can only get it once on their turn and once with their reaction (through Sentinel or a Battle Master's Commander's Strike or an Attack of Opportunity, etc.). At level 17, Scouts also get the ability, Sudden Strike, which allows them...

 
3:07 AM
3
Q: How do I tell the reader that my character is autistic in Fantasy?

thelonelywriterI am a woman with aspergers and writing an autistic character has always been close to my heart. Fiera Allas, a fantasy powerhouse with immense power and sword skills has always struck me as autistic (possibly because of how much of myself I put into writing her) and I want more than just the few...

 
3:20 AM
4
Q: Could a Weapon of Mass Destruction, targeting only humans, be developed?

CherrySpecifically, if deployed on a town. The buildings, animals (flora and fauna) would be completely untouched, but not a single human would survive the blow. Secondly, if this is possible, what gene, DNA, and/or disease, would the weapon target in order to specifically target humans? If it's no...

 
DBA
3:35 AM
1
Q: Way to find when system health file is rolling over

BeginnerDBAIs there a way to find the events when system health extended event files are rolling over rather than manually monitoring for the events? For my medium load server they stay upto 2-3 days. But for heavy loaded servers these files are rolling every 15 mins or so but no fixed pattern or timings. ...

 
3:47 AM
1
Q: Is there any problem with this camera not having a lens cover?

VillageI am considering buying the Fujifilm FinePix XP140, shown here: https://www.fujifilm.com/products/digital_cameras/xp/finepix_xp140/. I notice that most other cameras either have some form of lid that can be removed or have a cover that closes automatically when the camera is powered off. When I...

 
5
Q: Does anyone know what these symbols mean?

Ella LThis is part of Hasse's "Mea Tormenta, Properate". I think the one on the second staff is some sort of repeat sign, from the research I've been able to do, but I have no idea what the one on the third staff is for. I can provide more musical context if that's necessary. The second staff is a viol...

 
4:20 AM
1
Q: Why agni is known as jaatavedas?

Just_Do_ItA shloka of Kena Upanishad says: tey agnim abruvan jaataveda etad vijaanihi kim etad yaksham iti tatheti Agni – Fire, is called jaatavedas – ‘the knower of the Vedas.’ My question: Why is agni referred to as 'the knower of the Vedas'?

 
5
Q: Why don't all electrons contribute to total orbital angular momentum of an atom?

ROBIN RAJThere are 47 electrons in a Silver atom, but talking about its orbital angular momentum we only take the outermost valence electron which occupies the 5s orbital. Why don't the remaining inner 46 electrons contribute to the total orbital angular momentum of a silver atom?

 
RPG
7
Q: Can someone break into a Leomund's Tiny Hut via the Ethereal Plane?

ConfusedDMI've got players who rely heavily on Leomund's Tiny hut for a "safe" night time rest. I'm alright with them using it to help, but it gets irritating having a wrench thrown into my nighttime attacks. I have found some ways to deal such as Dispel Magic or having something camp them. One time, I ...

 
2
Q: Inquiring about the possibility of a job

user110178I am a fairly new Assistant Professor at a liberal arts university. I know from Facebook that a professor at my undergrad just retired and I specialize in some of the same classes this person taught. I would love to work at my undergrad. Is it appropriate to email my former advisor and ask to b...

 
5:20 AM
2
Q: cannot execute script while its permission is 'x'

HenryI have a script in the current dir, however, I cannot execute it given that: the permission is -rwxr-xr-x the script has a shabang #!/bin/bash at the top of the file my shell is /bin/bash I can execute it using bash script.sh I cannot execute it using ./script.sh, it gives me bash: ./script.sh:...

 
1
Q: Can I create a CAA record for all sub-domains

doekmanOur main web site uses HTTPS certificates issued by comodo. So we have two CAA records like this: @ CAA 0 issue "comodo.com" www CAA 0 issue "comodo.com" And we have multiple sub-domains with HTTPS certificates served by letsencrypt. Example CAA records like: test1 ...

 
1
Q: Why is my line not appearing smooth?

KayleighI'm trying to create a dotted line, but the path is showing up like it has additional anchor points where there are none. How do I fix this?

 
5:36 AM
4
Q: 3D nonogram – Name the object

jafeThis is a 3D nonogram. The first five boxes represent the five layers of a $5\times5\times5$ cube, and the last box shows the enumerations for the Z-axis. (Note that 11 means two stretches of length one here, not one of length eleven.) To increase the difficulty somewhat, a few of the numbers ha...

 
1
Q: Can two or more lightbeams (from a laser for example) have visible interference when they cross in mid-air?

HieronymusI am wondering if two or more specific (in terms of frequency, wavelength etc) light sources could exist and capable of transmitting visible or invisible 'light', and where the beams intersect each other, can have a visible (to the naked eye) indication of interference. Obviously, this doesn't ...

 
RPG
10
Q: What spells could a Bard identify from a Pact of the Tome Warlock's Book of Shadows?

Louis WassermanA Bard in my group has expressed an interest in attempting to read a Warlock party member's Book of Shadows, and I'm trying to figure out what, if anything, they can get from it. I figure they can't actually cast anything with it, since it's not made of spell scrolls, but they might be able to i...

 
1
Q: Word for the ability to deliver clever replies?

Riya AgarwalWhat do we call the person who comes back with clever replies when someone insults them? Also what is this ability (personality trait) to cleverly thrash rivals on-the-spot called? Example: Person A: "I can't bear fools." Person B: "Apparently, your mother could..." What should I...

 
5:54 AM
5
Q: Can a Bangladeshi enter India by air from third country?

Bidrohi DiponI am from Bangladesh, and I have an Indian tourist visa, which I received from the Indian High Commission in Bangladesh. At this moment I am in Bhutan. Now I want to enter India by air. Is it possible? And will I face any problems when I come back from Kolkata to Dhaka?

5
Q: What does BSCT stand for?

O. R. MapperApparently, BSCT is an acronym for ... baby bassinet. Somehow. Various airlines use it, for instance: Latam Air China The text only mentions the acronym like baby bassinet (BSCT) without giving any hint on what the letters actually stand for. What does BSCT mean exactly?

 
6:07 AM
7
Q: What game is this character in the Pixels movie from?

QuestwalkerWhat is this arcade character from? (this is from the Pixels movie)

 
5
Q: If two black hole event horizons overlap (touch) can they ever separate again?

LoadwickHypothetical question based on my understand that two event horizons that overlap (touch) can't ever separate again: Imagine a 1 billion solar mass black hole (so the event horizon is massive and very gravitationally weak) is travelling at a velocity of 0.9c through empty flat intergalactic spac...

 
ELL
7:01 AM
1
Q: What do you call the walking lanes in lecture rooms?

blackbird What do you call the walking lanes in lecture rooms? You can't call it a stair, because it's not really a stair, you can't call it a corridor either. The only word I can think of is walking lane, but I doubt it's called that. Isn't there a more specific word I can use?

 
7:27 AM
3
Q: Imaginary Numbers and DFT

mike628I'm not a math guy per se, but i am trying to understand the DFT. I get to the point where imaginary numbers are used with Euler's formula. What I don't understand is why we need an imaginary plane or "i" to begin with since we can plot any point on a real plane using sin and cos ? I am using t...

5
Q: Question about irreducible polynomials over finite fields

DorianoI have the polynomial $f(T)=T^2+T+1$; then, for which primes $p$ does $f(T)$ have roots in $\Bbb F_p$? I tried this way: since the three roots of $f(T)$ are generated from the cubic root of $1$, we need it to be contained in the field $\Bbb F_p$; namely that $m^3\equiv 1$ $($mod $p)$ for some $m...

 
3
Q: Computing the sum of an infinite series as a variant of a geometric series

CheeI came across the following series when computing the covariance of a transform of a bivariate Gaussian random vector via Hermite polynomials and Mehler's expansion: $$ S = \sum_{n=1}^{\infty} \frac{\rho^n}{n^{1/6}} $$ for $\vert \rho \vert < 1$. We know that $S$ must be finite and satisfy $$ S...

 
5
Q: When did Israel stop having giant fruit?

ArithmomaniacChazal tell us that the fruit the spies came back with from the land of Israel were huge. But I don't recall hearing mention of these giant fruit after the people entered the land (e.g. during the time of the judges). When did the giant fruit disappear?

 
Ham
3
Q: Why are there so many coaxial cable impedances?

R JohnsonWhy do we have 50, 75, 62 and 92 Ω coaxial cable, to name a few? Why not just one standardised cable? Is there some technical reason or did Mr. Coax and Mr. Cable have a disagreement, like Mr. Tesla and Mr. Edison?

 
7:48 AM
2
Q: Geometry GMAT related Question

BillyI have this GMAT question below. I cant understand how to get to the correct answer. Can anyone help me understand? Thank you. A rectangular photograph is surrounded by a border that is $1$ inch wide on each side. The total area of the photograph and the border is $M$ square inches. If the bord...

 
8:08 AM
4
Q: injectivity and surjectivity of a recursive function

ahmedLet $f:\mathbb{N} \to \mathbb{Q}^+$ defined as follows : $$\begin{cases} f(0) = 0 \\ f(2n) = \dfrac{1}{f(n)+1} \\ f(2n+1) = f(n)+1 \end{cases}$$ It is asked to prove the injectivity then the surjectivity of $f$. After examining first values taken by $f$, I proved by induction that $f(2^k)=\dfr...

3
Q: Find the polar representation of z = sinθ+i(1+cosθ)

MelissaQuestion is "Find the polar representation of the following complex number, where θ ∈ of [0,2π): $$ \ { z = sinθ+i(1+cosθ) } $$ I know how to write a formula in polar representation using hard numbers, e.g. $$ \ {z = 3(cosπ+isinπ) } $$ and know that I need to find both my radius using the $\sqr...

 
8:36 AM
8
Q: "temporary of type 'A' has protected destructor", but its type is B

jtbandesIn the following code, compiled with Clang 8.0.0+ and -std=c++17, creating a derived class instance using B{} gives an error error: temporary of type 'A' has protected destructor. Why is A appearing in this message when the temporary has type B (and thus should have a public destructor)? https:/...

 
5
Q: What is the purpose of putting a capacitor on the primary side of a step-down transformer?

darkskyI'm looking at this design For a split supply. I get that the thermistors are there to limit the inrush current, but I don't understand the purpose of C9 and how its value was chosen.

 
9:08 AM
1
Q: Adjective for 'made of pus' or 'corrupted by pus' or something of something of pus

Stephen BostonThis to be used in a sentence with: a somethingish discharge I like "pustulous discharge" but 'pustulous' is of pustules not of their content. 'Pusy' would be a natural but doesn't look like what it's trying to mean so..

 
9:49 AM
1
Q: How to bind keys to a function which can be defined per-mode?

ideasman42Currently I have variables defined with setq-local, this is useful for modes, so I can define variables only for a particular mode. How can this be done for functions? I'd like to have a function, eg:generic-lookup-reference-at-point, bind this to a key, then define it for each mode which has t...

 
7
Q: Can immunity be reverse-engineered simply by using a blood or tissue sample?

calI'm working on a novel, in which a character was given a cutting edge vaccination to a deadly disease. She is now valuable because she was the only one given the vaccine and the research to make more is unavailable. Now some people want to "reverse-engineer" the cure by studying her (the one who ...

 
10:00 AM
3
Q: Why is Japan trying to have a better relationship with Iran?

blackbirdWhy is Japan trying to have a better relationship with Iran (Abe Is First Japanese Leader to Visit Iran in 40 Years)? Is it worth it for Japan to risk alienating the U.S., which is a major ally of the U.S.? Why does Japan think the risk is worth it, and what might be the advantages Japan may get ...

 
10:34 AM
12
Q: How Did Lefschetz Do Mathematics Without Hands?

Steven LandsburgIf people think this is the wrong forum for this question, I'll cheerfully take it elsewhere. But: How did Solomon Lefschetz do mathematics with no hands? Presumably there was an amanuensis to whom he dictated his papers, and then dictated his revisions. Does history record that person's ide...

 
TeX
11:04 AM
3
Q: Matrix decomposition

naveganTeXI am trying to get what's on the image: Mi example looks bigger than the one in the picture, the latter looks more compact and nicer. Also, the matrices in the picture look sharper, meaning, they have a bold effect or something like that. \documentclass{article} \usepackage{geometry} \u...

 
1
Q: How can Chua's circuit work without having a power supply?

JethroI am now analyzing the following Chua's circuit. The triangle at the bottom denotes zero electric potential (I struggle to find the right symbol). \$N_R\$ is the Chua's diode. So the circuit is non-linear. This version of the circuit can be modeled by the following system of ODEs, which can ...

 
RPG
2
Q: What's the rule for a natural 20 on a Perception check?

iaminsensibleI was just watching this video from Geek & Sundry while I was preparing some content for tomorrow's session. If you click the link you should be at a specific time in the video. If you watch those couple of seconds the DM says that a natural 20 on perception makes the character learn everything t...

 
11:32 AM
2
Q: What's the difference between Truffle Migrations and ZeppelinOS upgradeable contracts?

BraheezyIt was my understanding that Truffle migrations will move updated contracts to new addresses. As a developer, you can use this feature to update already deployed contracts with new code. ZeppelinOS has a complicated solution using proxies. Is it doing more for you than a regular migration?

 
TeX
12:05 PM
1
Q: How can I add two boxes in minipages side by side?

Nguyen ThyI tried to create two boxes side by side in minipages but I don't know how to create them ? Any help is appreciated. \begin{minipage}[t]{5.5cm} \centerline{\textbf{TRƯỜNG ĐHSP TP.HCM}} \centerline{\textbf{Khoa Toán - Tin học}} \centerline{\rule{1.7in}{1pt}} \centerline{\textbf{...

 
12:32 PM
1
Q: How can I specify a local port when establishing SSH connections?

fajin yuI have two servers hosted in IDC. I can only use ports 20/21/22/23/3389/33101-33109 to establish connections between two servers. The IDC network device will block any other packets whose source or destination port is not in the 20/21/22/23/80/3389/33101-33109 list/range. But the source port of S...

 
2
Q: Sharing referee/AE report online to point out a grievous error in refereeing

TryerI submitted a short note to a math journal providing a counter example to a result in literature that had first appeared in that very journal. After 8 months, I heard from the journal. It was a rejection. The Associate Editor based his rejection on one referee who had clearly misunderstood my co...

 
6
Q: Movie with zoltar, a trailer park name Paradise and a boy playing a video game and being recruited by aliens to fight in space

Marilyn StaffordThe movie starts out in a trailer park named Paradise. A boy plays a video game and then is recruited to help fight in space for Aliens.

 
2
Q: Frontend for a Python program

Amreeta KonerI have a python program that merges 'n' number of excel files where 'n' is asked from the user. I have the python program made but i don't know how to make an interface where it asks the user to select the files that the user wants to merge and the output destination. Any kind of help would be hi...

 
12:53 PM
5
Q: Balanced parentheses using STL C++

dsahariaHere is a small program for checking if the parentheses are balanced or not. I am new to STL, and this is my first program. How can I improve it? Any kind of modifications or alternatives and suggestions are welcomed. #include <iostream> #include <stack> #include <string> using namespace std; ...

 
1:14 PM
12
Q: How to answer "write something on the board"?

analRecently I was in an interview and the very first thing I was asked to do was "write something on the board" and I wrote "something" which they said they found rude. I didn't had anything else on my mind so I wrote that. Interview was for Business Analyst position at a Fintech Company. Is there...

 
3
Q: Is the location of an aircraft spoiler really that vital?

CuthillMckeeI was wondering that spoilers in most of the aircraft are always placed aft (towards the tail) the CG location. Why aren't they placed ahead of the wings or near the nose of the aircraft? The same is the case with parachutes. For small UAVs, the parachutes are either at the CG location or placed ...

 
3
Q: Meaning of じゃないんじゃない?

Floating SunfishI recently came across the phrase じゃないんじゃない in this sentence: Clerk: でも うちで売ってるアイスじゃないんじゃないかしら For context, some kids are claiming they have a winning popsicle stick but the clerk can't seem to recognize it. Here, I believe the clerk is saying But I don't think we sell this kind of ice cream ...

 
GIS
1:50 PM
3
Q: How to add text on top of symbols for vector layers in QGIS

kalaw23I read the QGIS 3.2 Changelog and saw a new feature to add text on top of symbols for vector layers. Does anyone knows how to do this?

 
2:01 PM
6
Q: Print String Without Padded 0 At The End

gooddayjayI am trying to print the string "Hello" in binary. I get it to work, however, I would like it to print without the padded at the end so 01001000 01100101 01101100 01101100 01101111 instead of 01001000 01100101 01101100 01101100 01101111 00000000 Here is my code: char t[] = "Hel...

 
6
Q: In Soul Music, where do the corn fields behind Death garden come from?

motoDrizztIn Soul Music, Susan explores multiple times the area surrounding Death's cottage. Everything is how we are used to know it, with the predominance of black and the constant feeling that things are odd because, well, Death has no real experience of things and thus can never get anything really rig...

 
2:40 PM
1
Q: When to prefer PCA over regularization methods in regression?

Coolio2654When dealing with the curse of dimensionality, regularization methods seem to be clear in their intuition. All "regularization" methods can be seen as a "squeezing" of one's variables towards 0, when there exists too many of them. However, PCA dimensionality reduction is another way to handle t...

 
3:07 PM
4
Q: Pairwise Scatter Plots with Histograms and Correlations

DestinationLess_TravellerHas anybody written a function which can scatter plot data with histograms and correlations? Here is an example form MATLAB. This is related but does not print correlations. R has a similar function. Similar function in Mathematica would help new users like me.

 
3:44 PM
4
Q: How to securely dispose of a smartphone?

Alma DoHow to dispose of a smartphone (it's an iPhone 5) at home? I was reading through this SE site questions and found this one which hardly applies here. Besides, I'd want to do it so that: It's not damaging the ecology (at least not too much) I don't have to do it with work tools (I don't have a h...

 
1
Q: Using Raspberry Pi to flash its own SD card

Jeremiah RoseI'm developing a Buildroot OS for the Raspberry Pi, and my workflow requires very frequent re-flashing of the SD card to test new iterations. The process of removing the SD card from the Pi, flashing it on a Windows PC and then re-inserting it takes a lot of time. I would like to write a script t...

 
ELL
1
Q: Breakups - Makeups

DianneI came across this expression: Frequent breakups and makeups Is the "makeups" associated with the state after someone copes with the "breakups"?

 
CS
3
Q: Does a return economy-class seat between London and San Francisco release 5.28 t of CO2e?

KlausNI took this self-survey of CO2 emissions run by the German Environment Agency. It computes for example that an economy class seat from London to San Francisco and back - about 22 hours flight - accounts for 5.28 t CO2e. For comparison, the average CO2-emission in 2017 per capita has be...

 
3
Q: Why is it not possible to integrate over a singularity?

Justine I came across a question that states that the following integral does not exist $$\displaystyle \int_{-4}^{4} \frac{1}{x+2} \,\mathrm dx$$ I have seen similar questions on here where people have said that they can be integrated and have shown this. I am confused as to whether it can be or not.

 
4:07 PM
2
Q: Magento 2: I need to change template for different categories

ShiwaniI need to change the template for subcategories(like able to assign any category) and list.phtml is fine. But need to change template for random categories. Any one have solution for this?

 
2
Q: Static Diffie-Hellman in TLS

blabla_traceStatic Diffie-Hellman (cipher suites with DH in their name but neither DHE or DH_anon - requires that the server owns a certificate with a DH public key in it. When static DH key exchange is used, the server provides a certificate containing fixed Diffie-Hellman parameters signed by the certific...

 
4:23 PM
10
Q: Cast volatile array to non volatile array

earthlingI have a global volatile unsigned char array volatile unsigned char buffer[10] to which data is written in an interupt. I have a function that takes an unsigned char * and stores that value to hardware (EEPROM) void storeArray(unsigned char *array), in this example the first three values. Is it s...

 
posted on June 25, 2019

From StLuke5 and tagged as prusa-i3,3d-models,abs,enclosure

 
ELL
2
Q: What does the phrase "building hopping chop" mean here?

curiousHere is a sentence from an endless runner game: Building hopping chops is a good strategy to avoid unexpected dangers. The player is advised to leap to the side when she sees any danger or goes near a risky corner.

 
2
Q: How to differentiate using properties of logarithms

Jacobdodd56How would I differentiate the function $\ln\dfrac{x-1}{x^3}$ by applying the properties of logarithms? I've already differentiated using chain rule and got $-\dfrac{2x-3}{(x-1)x}$. However, I'm not sure how to do so with the properties of logarithms.

 
4:44 PM
3
Q: Does any Greek word have a geminate consonant after a long vowel?

DraconisI recently noticed a pattern in loans from Hebrew into Greek: the letter šin (or sin, or łin if you're really archaic) is transcribed σσ after a short vowel, σ elsewhere. My knowledge of Classical Hebrew and Aramaic is weak, so this gemination might be a feature of those languages for all I know...

 
7
Q: Could the Q destroy the universe?

JonIf a Q, or the entire Q, decided to destroy the universe, would they be able to?

 
2
Q: What was the impact of Fischer vs. Spassky 1972 on the relationship between the USA and the Soviet Union?

Indiana JennaIn 1948, the Fédération Internationale des Échecs (FIDE) organized the first Chess World Championship after WW2. Its winner was Mikhail Botvinnik. Further Chess World Champions were Vasily Smyslov, Mikhail Tal, Tigran Petrosian and Boris Spassky. All of them represented the Soviet Union. But in...

 
4
Q: Why do changes to /etc/hosts take effect immediately?

rudwnaChanges to /etc/hosts file seem to take effect immediately[1][2]. I'm curious about the implementation. What magic is used to achieve this feature? [1] https://askubuntu.com/questions/665995/after-modifying-etc-hosts-which-service-needs-to-be-restarted [2] https://library.netapp.com/ecmdocs/ECM...

 
5:05 PM
8
Q: How can I deal with extreme temperatures in a hotel room?

JutschgeRecently I've been on a business trip in Germany and I had a temperature problem in my hotel room. Since it was an attic room without air conditioning the temperature rose to uncomfortable levels during the day and my only solution to sleeping somewhat comfortably was taking a cold shower right ...

 
1
Q: Pshat of what did Korach take?

Lo aniIn Parashat Korach (Bamidbar 16:1-2): וַיִּקַּ֣ח קֹ֔רַח בֶּן־יִצְהָ֥ר בֶּן־קְהָ֖ת בֶּן־לֵוִ֑י וְדָתָ֨ן וַאֲבִירָ֜ם בְּנֵ֧י אֱלִיאָ֛ב וְא֥וֹן בֶּן־פֶּ֖לֶת בְּנֵ֥י רְאוּבֵֽן׃ ב וַיָּקֻ֙מוּ֙ לִפְנֵ֣י מֹשֶׁ֔ה וַאֲנָשִׁ֥ים מִבְּנֵֽי־יִשְׂרָאֵ֖ל חֲמִשִּׁ֣ים וּמָאתָ֑יִם נְשִׂיאֵ֥י עֵדָ֛ה קְרִאֵ֥י ...

 
DSP
5:20 PM
1
Q: How to Prove a System Is Invertible?

Buzz beewhat i know is that for a system to be invertibel it should be one-one , but I am confused that if i am given a transfer function of a LTI system how can I prove or verify if it is invertible. Another query is that can a system has more than one inverse systems , sometime before I used to think ...

 
3
Q: Conjugate る-ending verbs into negative form

SebastianSorry if this question has been asked before. I tried to look around for an answer but couldn't find it. I just want to state before that my question is not regarding the verb ある or verbs with kanji + multiple hiragana (for example 負ける). The question is regarding verbs with kanji + single る. I ...

 
5:37 PM
2
Q: Are all nilpotent groups hamiltonian?

vidyarthiAre all nilpotent groups hamiltonian? That is, is every subgroup of a nilpotent group normal? I don't think so. Every Sylow subgroup of nilpotent group is normal and every nilpotent group is a direct product of its Sylow subgroups. But, are they hamiltonian? And, would the converse be true? Tha...

9
Q: Picking balls from urns.

Carlos Lopez We have 2 urns, 5 red balls and 5 green balls. We will split the 10 balls in the 2 urns in any way we like (provided that each urn has exactly 5 balls) and then will choose one urn at random, of which we will pick one ball. If the ball is red, we will be asked to draw a second one from the o...

 
1
Q: Is it okay to fade a human face just to create some space to place important content over it?

Vikas KumarPlease see the image. Just to write the copy, I had to place white color over the upper half of the person on the right side. Is it okay to do so in Graphic Design OR is it terribly wrong here? PS: Copy size/no. of lines/words may vary.

 
6:03 PM
5
Q: Who voices the character "Finger" in The Fifth Element?

LevenTrekIn The Fifth Element, the main character Korben Dallas talks on the phone with someone named Finger - an old military friend who also happens to be Korben's boss at the taxi company. We never see the character, he only exists as a voice on the phone. Whose voice is it? This seems like it shoul...

 
6
Q: Why is copy constructor called instead of move constructor when returning?

RomCooLets say I have the class MyClass with a correct move constructor and which copy constructor is deleted. Now I am returning this class like this: MyClass func() { return MyClass(); } In this case the move constructor gets called when returning the class object and everything works as expec...

 
8
Q: Why would anyone even use a Portkey?

Mor ZamirI wonder why would anyone need a Portkey when there's a possibility to Apparate? I was thinking that some would not be able to Apparate since they have no license, I asked about it here, thinking that there is a bigger consideration on who gets approved and who doesn't (e.g. you were caught doin...

 
3
Q: How to Remove meta title tag in magento 2

hirokapuriyaI have issue any time in meta="title" and both are display all Pages So i have Remove Meta="Title" Using File Override In Magento Core Module

 
1
Q: Why do we use a cylinder as a Gaussian surface for infinitely long charged wire?

Pranav K Why do we use a cylinder as a Gaussian surface for infinitely long charged wire and not some other shape like cube?

 
RPG
7
Q: Handling a player (unintentionally) stealing the spotlight

user3399Quite recently, I replaced a friend as DM for a D&D game. During that game, I came across something I did not expect: One of the players was just too good. When I am saying "too good" I am not talking about his character being overpowered, but the player himself having the time of his life rolep...

 
6:29 PM
3
Q: Create custom script for send mail in magento 1.9

AnilWe want to create one php file. When we run it from front side then send mail. We don't want to create module. We also wand to use magento 1.9 default functionality. Any one help me for create it.

 
2
Q: Enable errors PHP Wordpress 5.2

DalekSince Wordpress 5.2 can not display errors on the site. The constants "WP_DEBUG" et "WP_DEBUG_DISPLAY" doesn't work. The following message is always displayed : "The site is experiencing technical difficulties. Please check your site admin email inbox for instructions." Have you solution?

 
8
Q: What exactly did Ant-Man see that made him say that their plan worked?

A JIn Avengers: Endgame, when Dr. Banner did the snap to bring everyone back, we see Ant-Man looking outside and saying Guys... I think it worked! Script Source But what exactly did he see that made him say that? There were just a tree and a few birds outside.

 
6:59 PM
5
Q: Does the app detect walking (and unlock Portmanteaus) if screen lock is on?

Chaos_99Will walking be detected if the phone is locked? What if the phone is unlocked, but the App is not in the foreground? Answers for Pokemon suggest "No" for both questions.

 
1
Q: Why is Silver Fang rated as S-class Rank 3 hero?

gokarelessIt's clearly that there is bunch of heroes are more powerfull but for some reason ranked below. Zombieman, Flashy Flash, Child Emperor - all of the guys allready beaten monsters ranked above Demon level, while Bang along with his brother Bomb couldn't handle exausted Garou. Is the ranking system...

 
2
Q: how to change Sales order default status? Magento 2

mohanaIn my website if order has placed via paypal or anything the status is seted as processing, but i like to set status to be pending. How to set, please let me know.

 
7:20 PM
15
Q: My colleague is constantly blaming me for his errors

AlexI'm a junior software developer in a small company. I'm working on a project since I finished my internship contract 4 months ago. It's a small project, so there's only another programmer (junior too but with ~3 years of experience) and the project leader, who doesn't even see the code. Everytime...

 
6
Q: Donkey as Democratic Party symbolic animal

Pierre BHow come the US Democratic Party is OK with being associated with a donkey? Couldn't they push for a more flattering animal? An elephant has stronger positive connotations. Couldn't they try to be associated with another one? There's plenty to choose: American bison, bald eagle, grey wolf, grizzl...

 
DBA
7:54 PM
1
Q: why the processing is sometimes terminated , sometimes not

slowjamsDECLARE @Error int; INSERT INTO Person.BusinessEntityContact (BusinessEntityID ,PersonID ,ContactTypeID) VALUES (0,0,1); SELECT @Error = @@ERROR; PRINT ‘The Value of @Error is ‘ + CONVERT(varchar, @Error); I got : Msg 547, Level 16, State 0, Line 4 The INSERT statement conflicted wit...

 
RPG
4
Q: Is this homebrew Half-Phoenix race balanced?

user56360Some week ago, my DM told us that we she was working on a new campaign. She also told us homebrew races and classes were allowed. I was thinking of making a new race and something that seemed interesting to me was a race that could revive after death. I then got the idea to make a half phoenix....

 
4
Q: Boolean Difference with Offset?

m0r0nIs it possible to create a Boolean difference with a defined air gap (offset) between object A and object B (see picture below)? This is particularly interesting for 3D printing operations, where one physical object needs to be set into another. So to achieve this, normally you give a tiny gap be...

 
8:12 PM
3
Q: Verifiable delay functions vs Proof of Sequential Work

BartolinioI've read recent papers about verifiable delay functions (Boneh et al 2018) and proof of sequential works (Cohen et al. 2018). I understand that the core difference between the definitions is that a VDF output is required to be unique (while in PoSW constructions - many commitments can prove know...

 
RPG
4
Q: Is it possible for Leomund's Tiny Hut to be lifted?

ConfusedDMI've been trying to come up with creative ways to get around Leomund's Tiny Hut and another idea recently came to me. When I first started, I had looked into burrowing creatures that would penetrate the hut from beneath. There is however this topic that really makes sense with the Hut having a ...

 
2
Q: Training with a subset of data: relationship between subset size and training metric?

Matt WenhamI have a not-quite linear regression problem which I am investigating. The data set is fairly large, with ~6000 samples and ~2100 features. By performing 5-fold cross-validation on different sized subsets of the data set, I have found a strong relationship between the fraction of the data set us...

 
8:54 PM
2
Q: Choosing my first bike

 NickI would like to get into biking. Haven’t ridden since I was a kid. Back then everyone had a one speed bike. The 10 speed English racer was the bike you dreamed of getting. I never had one. I’m in my early 70’s and live in W. Massachusetts, very hilly terrain. Up until a couple years ago I did a...

 
5
Q: Do launching rockets produce a sonic boom?

foobarbecueI've been watching rocket launches, and the commentator often remarks when the vehicle has gone supersonic. There is presumably a sonic boom at this point, right? Is it just that we don't hear it on the ground because the engines are louder, and overpower the sound?

 
2
Q: Lifting a probability measure to the power set

Dominic van der ZypenLet $X\neq\emptyset$ be a set and let $\mu:{\cal P}(X)\to [0,1]$ be a probability measure. Is there a probability measure $$\bar{\mu}:{\cal P}({\cal P}(X))\to [0,1]$$ with the following property? For all $S\subseteq X$ we have $\bar{\mu}({\cal P}(S)) =\mu(S)$.

 
9:46 PM
9
Q: Just graduated with a master’s degree, but I internalised nothing

AlphabetI just graduated with a first-class software-engineering master’s degree from a top-five university in the UK. I also have a bachelor's in computer science. I always revised just for exams and just enough to get that first-class degree, without actually learning anything. I basically revise for ...

 
0
Q: Should fiction mention song names and iPods?

cool_bodhiIn my novel, the protagonist is depressed. In the story which is in my mind... The autumn leaves were falling as I was sitting alone and Gary Jules' "Mad World" was ringing in my iPod. The setting is in 2013 and it was normal then to listen to MP3s and iPods. But I've read that it's lazy...

 
4
Q: Chords behaving as a melody

DuplexI've been learning some Christmas carols on the guitar and I noticed that the chord structure they have is very different from what I can usually see in popular/rock music. I noticed that the melody that is meant to be sung is reflected (along with it's pitch) by the chords following this melo...

 
10:07 PM
3
Q: Can Aziraphale and Crowley actually become native?

Gustavo GabrielIn the final episode of Good Omens, Aziraphale and Crowley are captured by the forces of Heaven and Hell and put on trial for treason. Both are sentenced to death, Aziraphale by hellfire and Crowley by holy water, but to the surprise of their masters, they are not hurt by these. Belzeebub even s...

 
10
Q: Step into the Octagram

SlowMagicThe diagram below shows a partially-filled "octagram". Step into it, if you dare! At every vertex in a long word. Flowing into every vertex are two short words. Anagrammed together, these two short words yield the long word. Flowing out of every vertex are two more short words. Anagrammed...

 
10:22 PM
4
Q: Bit-based universe simulation

Gansaikhan ShurI am working with this problem (https://open.kattis.com/problems/whowantstoliveforever). As the problem states, my program has to determine if the universe lives or dies based on the input 0s and 1s. To determine the next value of the i-th bit, look at the current value of the bits at posi...

 
4
Q: Does flying two boosters close together affect efficiency?

foobarbecueWhen returning the side boosters of the latest Falcon Heavy launch to their landing site, their trajectories keep them right next to each other, and I noticed that a "wall" of vapor is visible midway between them. This made me wonder whether flying two boosters near each other has any performance...

 
7
Q: Is it legal to call shared_future::get() multiple times on the same instance in the same thread?

vinesI can find neither direct confirmation nor refutation on the matter. All answers seem to address the "access from multiple threads" aspect, rather than repetitive access itself. Does the standard define the behavior for std::shared_future? What about boost::shared_future?

 
1
Q: What documents are needed when travelling from Botswana to United Kingdom?

BoitumeloAs a citizen of Botswana, I am not required to apply for Visa by virtue of being part of the Commonwealth countries. However, I would like to know which documents are needed when I arrive in the UK.

 
10:42 PM
13
Q: Can a function nowhere continuous have a connected graph?

Adam LatosińskiAfter noticing that function $f: \mathbb R\rightarrow \mathbb R $ $$ f(x) = \left\{\begin{array}{l} \sin\frac{1}{x} & \text{for }x\neq 0 \\ 0 &\text{for }x=0 \end{array}\right. $$ has a graph that is a connected set, despite the function not being continuous at $x=0$, I started wondering, doest ...

 
10:54 PM
3
Q: Buliding a larger matrix from a smaller one

Alexander NikolaenkoI have my matrix $h$ of size $2N\times 2N$ in this form $$h=\begin{pmatrix} a & b \\ c & d \end{pmatrix} $$ where $a,b,c,d$ are smaller matrices which i don't know. Is there any simple way to get this matrix? $$\begin{pmatrix} a &0& b&0 \\ 0 &a& 0&b\\ c &0& d&0 \\ 0 &c& 0&d\\ \end{pmatrix} $$

 
TeX
10
Q: Are all commands with an optional argument fragile?

BrooksHere is a discussion of fragile command in LaTeX. And it says that any commands that have an optional argument are fragile, for instance \footnote[2]{myfoottext} and \footnot{myotherfoottext}. I have tried the example below which the commmand \b has an optional parameter but it works without \pro...

 
1
Q: Flipping a coin with same initial conditions

NoLand'sManToday, in my physics class my teacher was talking about how we can never predict the outcome of a coin flip. So I thought: Will the outcome of a coin flip be the same if we do not change the initial conditions (such as launch angle, force position where force is applied,etc.)? Intuitively, I feel...

 
11:18 PM
3
Q: How to test CRUD and FLS in unit tests?

EduardBACKGROUND I am working on a managed package and it contains a custom object (X__c) with one custom field (X__c.Fld__c). In the controller I check if a user has Read access to both the object and field: MyController.cls public class MyController { public MyController() {} public List<X__c>...

 
2
Q: Can an editor review manuscript without sending to reviewers?

user40491I submitted my manuscript to a journal one month ago and the status is "with editor" up to now. As the editor of my paper is one of the leading scientists in the field of my research paper (mathematics), I would like to know that can an editor do the review of paper by him/herself without sending...

 
6
Q: Find first and last non-zero column in each row of a pandas dataframe

CindyI have DataFrame in view of Name and Date with values of weights in cells : Name Jan17 Jun18 Dec18 Apr19 count Nick 0 1.7 3.7 0 2 Jack 0 0 2.8 3.5 2 Fox 0 1.7 0 0 1 Rex 1.0 0 ...

 
7
Q: Why does the same classical piece sound like it's in a different key in different recordings?

Jeff ShallI've noticed that sometimes a different recording of the same piece will sound like it's being played in a different key. For example, I listened to Concerto No. 6 in B-Flat Major, BWV 1051: III. Allegro in a recording by Richard Egaar and then one recorded English Baroque Soloists. When I compar...

 
11:34 PM
6
Q: Security Patch SUPEE-11155 - Possible issues?

Luke RodgersMagento has released a new security patch for M1, and updates for M1 and M2. What common issues do you have to watch out for when applying this patch/upgrade? Magento 1 https://magento.com/security/patches/supee-11155 Magento 2 This should be the last release in the 2.1 series which reaches ...

 
1
Q: Why STP has to be disable on Trunk Ports?

Jim PapI have 5 Switches on a Private Network 10.0.0.0/8 with 8 Vlans. On Access ports is running Rapid STP. On Trunk Ports between Switches should i disable STP or not? I would be very pleased if someone can explain why.

 
11:50 PM
5
Q: How can I write a panicked scene without it feeling like it was written in haste?

Dawn KelliI normally try to place myself in my character's shoes and I think to myself, "how would I react if I were in this situation?" Well one of my beta-readers commented on my work, and he said the chapter sounds like it was written in haste to go along with the panic and dire of the situation at hand...

 
7
Q: Perl 6 multi methods never match expected signature

kawaiiI have a class with two multi methods (multi submit). I call my multi like this: $perspective.submit(:message($message.content)); Which gets shipped off to my class: my $perspective-api = API::Perspective.new(:api-key(%*ENV<PERSPECTIVE_API_KEY>)); proto method submit (|) {*} multi method ...

 

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