Attribute references and instantiation In this link, that is part of the official Python documentation, I have found the following information: Class objects support two kinds of operations: attribute references and instantiation. Attribute references use the standard syntax used for all attribu...

Is there a way to define addition and multiplication of natural numbers using the language of category theory? Like, one could say that "Addition is the unique functor that satisfies..." and "Multiplication is the unique functor that satisfies...". I would be very interested in such a definition.

I'm getting confused with the results of experimental data with two groups and three measurements. Imagine a mixed-model in lme4, where I am interested in the effect of the interaction group*measurement. My model is a random-intercept model comparable to model1 <- lme(outcome ~ group + measuremen...

The following sentence comes from lines 74–75 of chapter XXV of Lingua latina per se illustrata. Familia Romana, after Ariadna has said some words to Theseus: Haec locūta, Ariadna Thēseō fīlum longum dedit This explanation is written in the margin of the book: haec locūta = postquam haec locūt...

Could somebody explain what symbol JP1 means? iIt is presented in the schematic of the datasheet of a USB-C PD controller. I think JP1 symbol is kind of two state connector (normally closed and normally open) used for testing given that in the datasheet of the component it is not specified as req...

I read a sci-fi book back in high school, around 88-91. It involved a frontier man on alien planet and fuzzy aliens who liked biscuits cooked in a brass or copper kettle.

I have learned that evaluating an uninitialized variable is undefined behavior. In particular, int i = i; is undefined behavior. I have read What's the behavior of an uninitialized variable used as its own initializer? But, is using a reference variable to initialize itself also undefined behavio...

He still wakes up to feed every 4 hrs stays up for 10min every feed and will sleep from 11:00pm to 11:00am and throughout the day takes 2 naps that are 2 hrs long sometimes 3hrs

I was wondering how many (simple and martial) weapons in official D&D 5e source books (adventures, campaign settings, etc.) other than the Player's Handbook (and excluding magical variants of existing weapons)? Is there a complete list somewhere? Note: I'm aware that there are some in the Monste...

This is the code I used in my project void setup() { Serial.begin(9600); pinMode(6,OUTPUT); pinMode(7,OUTPUT); pinMode(8,OUTPUT); pinMode(9,OUTPUT); pinMode(10,OUTPUT); pinMode(11,OUTPUT); pinMode(12,OUTPUT); pinMode(5,INPUT); } void loop() { Serial.println(digitalRead(5)); ...

I am trying to extract Arabic text between the two tags. Here its <Content>some text in arabic</Content> Sample Text: <idPkg:Story xmlns:idPkg="http://ns.adobe.com/AdobeInDesign/idml/1.0/packaging" DOMVersion="19.0"> <Story Self="uf3" AppliedTOCStyle="n" UserText="true" IsEndnoteStory="false"...

Has anyone been prosecuted because a minor drank alcohol for religious purposes, such as sacramental wine used for the Eucharist/Communion in some Christian denominations? This could be either the minor being prosecuted for illegally consuming alcohol, or another person being prosecuted for givin...

This question covers a delectably lactose-tolerant method of accessing one or more Glyphs prepared in an extradimensional space, which it's assumed a DM would rule does not "move more than 10 feet" even as your character moves around in their host dimension. Namely, use magic items that give you ...

The tensile, shear and compressive strength of all their tissues, including bone, skin, muscle, etc., is multiplied by a factor of 80. They are also very buff and so have a large body volume. How resistant would this person be to conventional firearms? What kind of rounds would be necessary to sc...

The importance of termination matching the cable is emphasized all the time. But before the wires reach the termination resistor they usually pass the connector. I've only seen the impedance specified for some F-type connectors, while CAN, RS485 and other differential lines are routinely connecte...

I understand that an assumption of Poisson regression is a linear relationship between the transformed expected response in terms of the link function and the explanatory variables. Therefore you would only include variables with a linear relationship in the model. If I wanted to look at the rela...

I have a UF cable running a 20amp circuit from my house to a shed in NJ. Probably at least 30 years old, house is 50 yo. Just bought it. Today while digging a drainage trench I found out the hard way that the UF cable is only 12 inches below ground, and nicked the outer sheath of the wire exposin...

Suppose that I have two electrons in a box that were originally spread by a infinite potential wall. The two electrons are in their ground state wave function(sine function). Now I removed the barrier for the two electrons to interact, how is the Pauli anti-symmetrical paired formed? Do I have to...

Let $M$ be a smooth manifold and $p:M \to N$ a covering map. Then $N$ is a topological manifold but is it necessarily a smooth manifold? If yes, does there exist a smooth structure on $N$ making $p$ into a submersion? If $\Gamma$ is a discrete group acting freely and properly on $M$ by diffeomorp...

I found this article by petzl here. I have trouble following the comparion of the rappel setups with the pull cord. I dont understand how the second one gains this stated advantage: The next rappel can be set up without threading the rope through the ring. Would be nice if someone could explain...

I have read over 50 articles on a topic I am writing about but do not see any research gaps. I have spent a lot of time reading the introductions of papers, since it is there that I found the most interesting overview of the field and current state of study on the topic being researched. How can...

Yes, I see there are other Q&A's on this, for instance here: Projective objects in the category of chain complexes I am wondering why a level-wise projective chain complex $P$ which is split exact can be written as a direct sum of the $P(n)$ from Ralph's first answer in the link above, rather th...

I’ve encountered a bug on the Commodore 64. When I write out the full TAB command, i.e., TAB(…), everything works as expected. However, when I use the abbreviated form, tA, an extra parenthesis is added when I list the program. I’m wondering if anyone can suggest a workaround for this issue. exam...

The core point I would like to convey in a manuscript could be well demonstrated by a dialogue that Piglet and Winnie the Pooh could have had. If I had found a reference where they had such a conversation, I would have quoted and referenced it, but I did not. What I want to do instead, is write a...

I can't find, how to remove the space between the blocks here? (the fbox will ultimately be removed, they are just used to show the problem) And more generally, how could I debug this in order to find what is posing a problem? MWE: \documentclass[]{article} \usepackage[most]{tcolorbox} \usepack...

I am trying to model the fish from this answer: I have attempted to create it with: default cube loop cut on y axis scale on y axis bevel, extrude, and scale for fins spheres for eyes How can I make it better/more similar to the one from the answer? If it is possible to create procedurally/wi...

It was a fantasy world of a kid that went sailing into the sea looking for some magic gems. The kid had a sword that looked half broken and the antagonist was some sort of monster that used one of its minions to infiltrate the protagonist ship to gain its trust and steal the gems. In the end that...

I decided to open the disk usage statistics in Resource Monitor, and discovered that after closing notepad++.exe, even if there were no files open, a large write to the disk occurs. In the first second, the speed is approximately 4 MB/s, then less: 3 MB, 1 MB, 500 KB, 300 KB, 100 KB. And in total...

I have made a home made power supply using an LS-A7632-PT transformer I yanked from an old electronic. It takes 120v input and steps it down to somewhere around 6v and has two 6v legs. I then have a full bridge rectifier and a 6.3v 2200uF capacitor for leveling out the peaks. This goes to a small...

I applied and got an offer at a graduate school. Before the confirmation deadline I got an offer in industry and I accepted it. The PhD position had extremely low salary, which would barely support my survival. How can I communicate my reasons gracefully? The PhD project and collaboration seemed ...

I just want to run this past some folks who know better than I. My contractor has framed the Hardie Plank lap siding of my exterior addition with a synthetic board (that I don't know the name of) but the exterior window of the project is framed in finger jointed pine board enter. The pine board ...

As you know, big-O notation hides all constants. For instance both runtimes $T_1=n$ and $T_2=10^{10}n$ are considered to be linear ($\mathcal{O(n)}$). Is there any iconic problem whose best known solution has a terrible (large) constant in the runtime expression?

I'm writing a validator class to validate certain request objects against a known format. Rule declarations and the validator will both be written entirely in Python, and I don't need to store the structures in the DB or go across the wire in JSON or anything of that type. I'm considering using t...

Egypt is facing mounting pressure to act as neighboring Gaza gets pummeled by Israeli strikes after October 7’s brutal assault in Israel by Hamas. In the wake of the Hamas attacks, Israel closed its two border crossings with Gaza and imposed a “complete siege” on the territory, blocking supplies...

This package can’t be installed. There are problems that prevent this package from being installed. The requested package doesn't yet exist or has been deleted. If this is a recently created package version, please try again in a few minutes or contact the package publisher. At 2:25 PM EST I su...

Transaction in question: 16ac7736552c5791cff5643e6104c76c24018236b2193e014b308efea4f32f81 The P2SH input has a strange redeem script: OP_DUP OP_HASH160 OP_PUSHBYTES_20 caaa64d70e561ca95bbb4f1220636f625494bf70 OP_EQUALVERIFY OP_SWAP OP_CHECKSIG This is almost the same as a P2PKH script, except th...

What are the limits of free speech? What should they be? How to determine them? In particular, should freedom of speech accept speech against diversity, and other liberal values? Should it for example accept such chants that call for the destruction of this or that minority? If people want to pro...

I have a project that involves large-scale text embedding of biological literature. In this case, each biology article would be given a set of numbers (embedding) based on the text in the article. We would then analyze these embeddings exclusively. Ideally I would use full-text articles rather th...

There are quite a few simple results about convergent/divergent series derived from similar ones. So, here is something that I came across recently: Let $\sum_{n=1}^\infty a_n$ consist of positive terms and be convergent. Define $b_n = \frac{1}{na_n^2}$. Is the series $\sum_{n=1}^\infty \frac{n}{...

Much of the information I find is about super-cells. What about for a single unit cell? Is it necessary to add a vacuum space?

In my story with magic based around manipulation of electromagnetism I need the characters to have a hand waved electric organ. This electric organ is about 10 cm per each organ with the capacity to generate magnetism. The problem is that the organs are large and I can’t think of any spaces that ...

What public transportation is available to go from Leipzig/Halle (LEJ) Airport to Grimmaischer Steinweg 1, 04103 Leipzig? It is written on their website that the hotel is a 10-minute walk via the Georgiring from Leipzig’s main railway station. I will be carrying luggage. Is there public wifi in L...

Confusing title, I know. Imagine a perfect, homogenous sphere with an exact radius of $1,000 \text{km}$ and an exact mass of $8 \times 10^{15} \text{kg} $. If you use the formula for escape velocity $v_e = \sqrt{\frac{2GM}{r}}$ and plug in the numbers, you get $v_e = 1.033386 \text{m/s}$, which i...

Assuming a spaceship with artificial gravity was possible, would it be possible for it to have an extremely short range, like a few feet. So you'd be able to have a ship with 1g but not have it attract every other ship in a 1 or 2 mile radius around it? Please excuse the crudity of this render, I...

I was reading the following result from the book Metric spaces of non-positive curvature by Bridson and Haefliger. Result: Let $F_0,F_1$ and $H$ be groups acting properly by isometries on complete $CAT(0)$ spaces $X_0, X_1$ and $Y$ respectively. Suppose that for $j=0,1 $ there exists a monomorphi...

What is the meaning of "wait a few tables" in the text below? As far as I can deduce it would mean working as a waiter, but that doesn't seem to make sense within the context of the text - or maybe I'm not able to see the context in a broader way. Can this expression have any other meaning than t...

When answering a Physics.SE question, I made a claim that Newton realized that F=ma worked in some frames, which are called "inertial frames." Now days, we know that there are non-inertial frames. One of the commenters suggested that started with d'Alembert. Further research shows he is certai...

Let $G$ be a metacyclic group. Let's call it a split metacyclic group if it has a cyclic normal subgroup $N$ and a cyclic subgroup $H$ such that $G=HN, H\cap N=1$. Equivalently, $G\cong C_n\rtimes C_m$ for some $n,m$. What are the non-split metacyclic groups? The quaternion group $Q_8$ is one exa...

Lately, I was studying the concept of unit testing in python, so I have decided to write a imperative strong password validator ( checker ) and also attach a unit test to it. I would like to know if there is any recommendation for improving this code, Thanks! main.py #!/usr/bin/env python3 # -*...

I'm writing an application to sync files between two directories. In order to prevent simultaneous access to the shared directory from several computers, I implemented blocking of the shared directory. The class below implements this lock. The application is built and at first glance works withou...

I used to connect my guitar on my PC using a Rocksmith cable, and would use Guitar Rig 5 as my amp simulator. I recently bought an Audio Interface (Behringer U-PHORIA UMC204HD) and I'm impressed that it greatly reduced the latency of what I hear on my headset. However, my headset is USB, so I can...

For positive reals $x,y,z, \ x>3$, satisfying $x+y+z=60$, maximize $(x-3)(2y+1)(3z+5)$ From the AM-GM inequality for positive reals, $$ \frac{a+b+c}{3} \geq (a\cdot b \cdot c)^{\frac{1}{3}}$$ Equality for this expression (and hence maximum for the geometric mean) is attained when $a=b=c$. Appli...

Should user vimfiles/after/ftplugin scripts loaded after any system script?

This is a follow-up question of my previous question How to set the font type globally. To use helvet globally, I have to use the command \renewcommand\familydefault\sfdefault. So when I am using the following code: \usepackage[T1]{fontenc} \usepackage{helvet} \renewcommand\familydefault\sfdefaul...

'Gender-specific' has dictionary definition. It means connected with women only or with men only. I think I have also seen other words like this, formed with 'specific'. Now the question is how far this can be generalized when writing English. Can we create new X-specific pairs? Or we should only...

In the Hittite text CTH 591, we see this curious passage: 9-an ŠI 9-an SIG₇-an 9-an GAŠAN-TI MU-ḪI.A-uš a-aš-šu-ša-aš 9-ACC eye 9-ACC yellow.green-ACC 9-ACC lady- ?? year-PL-ACC good.ACC.PL On the face of it, this doesn't make any sense. But the logogram ŠI "eye" looks like a 10 ...

Our door handle fell off — the screw keeping it on the handle fell out, and we couldn’t find it anywhere. We’ve tried every possible screw at Lowe’s, but I guess this is special/proprietary in some way?

I was seven or eight and I believe it was in 2011. It was on the Syfy channel. I believe there was a sequel as well. All I remember is the scene from the beginning. A young girl goes into a boys house and gives him a necklace to protect him from a creature or spirit. The entity kills his mother a...

I'm wondering how secured an ESP32 is. I'd like to use one to read data on a Telnet device which should remain in an offline network for security purposes. The ESP32 uses an Ethernet connection to this device and periodically sends Telnet commands and reads answers. Once an answer is received, t...

A Tweet in French with some 200K+ views (and some thousands of likes/retweets) claims Des images inédites ont fuité où ont voit des hélicoptères israéliens Apache bombarder ces propres concitoyens pendant le festival de rave le long de la route le 7 octobre. L’armée de Tsahal ni les responsables...

I am a complete Blender noob. I am editing a simple video (no 3D objects) and I am trying to apply the same transformation to multiple images at once. However, I can't select and apply to multiple. system info: version: 3.5.1, branch: blender-v3.5-release, commit date: 2023-04-24 18:11, hash: e1c...

Like a lot of people in the UK fortunate enough to have savings, the higher interest rates mean that I will be getting more than the £1000 tax-free allowance on savings interest. Unlike a lot of people, I pay tax both via an office payroll system via PAYE and self-assessment on a small additional...

There's a vast literature about super-polynomial lower bounds on proof lengths of Tseitin formulas in bounded-depth Frege systems, but what I'm curious about is: what if we don't restrict the depth of the proof? I found a paper which claims that Tseitin formulas have a polynomial-size proof in th...

An efficient algorithm for factoring would be a major mathematical achievement giving the person who discovered it anstant fame. About two years ago, C. P. Schnorr claimed such a breakthrough but it turned out the approach did not work as well as he thought. The technical details of his approach ...

Johannes Itten (1888 - 1967) was a Swiss painter and designer From 1919 to 1922, Itten taught at the Bauhaus School in Weimar, teaching his students the basics of materials, composition and color. One of his better-known works from this period is the color star of 1921: Color wheels and stars h...

I am currently studying ARIMA models. When I checked for a Python library to train one, I stumbled upon statsmodels which features ARIMA (and SARIMAX from which ARIMA inherits). However, there is one thing I'm not quite sure I understand. When differencing, we account for a trend in the time seri...

I am looking for the original article about the Cullen numbers. But all I can find is the reference to "Question 15897" in "Educ. times 534, 1905". But I cannot find the "educ times" and I can't find any information, what it is at all. Is it a journal? Can you help me with that? I found some othe...

(From The Wrecker by Robert Louis Stevenson and Lloyd Osbourne, Chapter XVI, published 1892) Passage 256 “All the same,” continued Nares, “you went into the opium-smuggling with your head down; and a good deal of fussing I've listened to, that you hadn't more of it to smuggle. Now, maybe your pa...

QGIS is installed for all users on a Windows machine. A custom Processing algorithm stored in a file named alg.py should be made available to all those users by storing it in that QGIS installation. It should not be installed to the users' profiles but in the central QGIS installation directory. ...

I want to fill all of these faces with a vertex . I suppose Ctrl + R will work, but is there any alternative faster way to fill it instead of Ctrl + R each face?

If $f \in L^2[0,1]$ then it follows from the uniqueness-theorem for Fourier series that if $$ \int_0^1 f(x)e^{-2\pi i x n} dx = 0, \quad n \in \mathbb Z $$ then $f=0$ almost everywhere. Now let $F \subset \mathbb R$ be a general set of frequencies that is (a) periodic and (b) has density one, i....

I am planning to ride from the ferry arriving from the Netherlands in North Shields, near Newcastle, to Hartlypool, about 25 mile / 40 km to the south of there on the east coast. I am now looking at which route will allow for a velomobile, a recumbent trike with a shell which is over two meter lo...

The learning resources I'm using suggest the following formats to state the time of day (emphasis mine): Le undici del mattino Le due del pomeriggio Le nove di sera Why do mattino / pomeriggio use the definite article ("del") but sera does not ("di")? Are the following alternatives correct and,...

We have created Multiple Select Attribute with 3 values, it displaying in product edit page in backend as below : Now we want to create one more option for that attribute and that value should be empty , when i created with empty value and tried to save , i got error as : The value of Admin scop...

It seems that in most of philosophical history, the attention of the word miracle has referred to a direct violation of a law of nature. It would, however, be naive to not notice how religious coincidences often underpin the reasons for many people believing in god. A religious coincidence is sim...

there's a meaningful payload to orbit advantage with hot staging that is conservatively about a 10% increase (Elon Musk during Twitter Spaces interview on June 24th, 2023, timestamp 37:13) In a line of work dominated by tiny incremental sub-cent percentage improvements, this ten percent figure ...

We have two Domain Controllers running 2012 R2. I have been given a project to replace these with 2022. I have just discovered that the Domain Functional Level is still 2008 R2. I have issues with FRS which i need to solve before i can join 2022 server as a DC. Would i be correct in assuming the ...

I just purchased a 11'x23'x8' aluminum pergola from Wayfair that will arrive in a couple weeks. It weighs roughly 750lb. In some reviews, it says the concrete screws that come in the kit are kind of weak so I'm looking at beefing them up a bit. The pergola has 6 posts and each post has 4 pre-dril...

The Sun's energy comes primarily from fusion of light elements in its core. It is estimated that a very small fraction of mass of the sun (~10^-12 times the abundance of hydrogen) is Uranium (both 235 and 238 isotopes). But given the huge mass of the sun (~2 x 10^30 kg), the mass of Uranium in su...

I have a problem with dotted note chords in LilyPond, for example: \version "2.22.2" \relative c { <f' g a c>4.\arpeggio } This produces: For the sake of presentation, I am wondering is there a method to avoid showing the dot under line 1?

I currently begann learning Falcon BMS and watched some fighter cockpit landings on YT and learned the technique to land a fighter is to use your AOA and not Airspeed like you would do it on a GA Plane or on an Airliner what is the reason for that ? why are you not calculating the Approach Speeds...

Helmsman's Recourse is a specific shield from Treasure Vault, that is based on a Meteor Shield. The only benefit of a Meteor Shield over a Steel Shield (that I can see) is that it can be thrown to 30 feet. The Returning property rune solves this problem of thrown weapons, but Helmsman's Recourse ...

Prove or disprove: There is a way to choose independent random chords in a circle so that their intersection points (given that they exist) are uniformly distributed in the circle. One common way to choose a random chord in a circle, is to connect two uniformly random points on the circle. Assu...

I read that in slavery you can not separate mother from children. Is it true and please provide reference.

I want to run two shell scripts after each other, in the background, preferably also using nohup. I start with % nohup a.sh & This runs a in the background. % nohup a.sh && nohup b.sh This runs a and then b (if a succeeds) But how do I launch the last combination in the background? If I do % no...

I have a slight confusion regarding the saturation rating of transformers. I often find this value stated in Volt-Seconds, which is a unit for the saturation flux, i.e. the maximum flux that the core can hold. After all, the saturation flux density \$B_\text{sat}\$ and the cross section of the co...

I don't have any basis on multivariate gaussian distributions and amid one exercise I was solving about a non-directly related topic, the following question came to my mind: Let's say we have some random variables $X_1,\dots,X_n$ such that each $X_i$ follows a gaussian distribution of some kind. ...

How to get roughly evenly distributed mesh points along boundary? We can see marked by red circles, that some points are too close to each other while others are too apart from each other. Show[#, Graphics@ Point@(Join @@ (PolygonCoordinates /@ #["BoundaryPolygons"]))] &@ BoundaryDiscretizeG...

The New Arab wrote on Nov 3: Egyptian consumer goods have, in recent days, flourished as a direct result of a massive boycott campaign targeting the sales of Western products amid an ongoing Israeli war against the Palestinians in the Gaza Strip. [...] On Thursday, 2 November, the Federation of ...

Consider the specific example where a row of light bulbs (initially off), arbitrarily turn on at different rates. For a light bulb at position $x$, call this rate $f(x)$. This is an irreversible process, so if a light is on, it stays on. Now consider $p(x,t)$ the probability of a light bulb turni...

I have read a sentence: Wake me at nine bells. When to wake the people?At nine o'clock?

I am studying linear algebra. I find elementary level linear algebra; i.e, concepts like vector spaces,basis, span dimension, solving determinants, finding Eigenvalues ,using Cayley Hamilton theorem, etc very easy. I am reading Sheldon Axler's Linear Algebra done right. I have completed exercises...

I'm currently studying for an exam related to graphs, reason why I have been asking several question of this topic. In this case, I am confused about the definition of bipartite graph, at least up to a certain point. I am asked to find how many bipartite graphs are there so that the two sets of ...

After upgrading to 23.10 (from 23.04) I noticed that on my system there are more than 220 Noto fonts. This is kind of insane. In today's world of UTF standard why do we have so many fonts for some languages? How, can I safely get rid of them? Please, note that his question is different than one o...

I've been working through the Stat 110 Lecture Series and have come across the idea of Story Proofs. I've read the following from the author's book on the subject: A story proof is a proof by interpretation. For counting problems, this often means counting the same thing in two different ways, r...

Attic truss has a diagonal brace (red) linking all but outermost king posts (blue). I would like to flip the orientation so that instead of starting at bottom at one end and ending at the top, it would start at the top and end at the bottom. Everything else would remain as is. Does the orientatio...

I recently learned of the Korean word 가방 (gaban), which is supposedly derived from 鞄 (かばん), but it seems there isn't much of a solid trail after that. From what I can tell, it might be related to the Chinese jiābǎn, though under the Korean entry for 가방, there's mention of the Dutch kabas. Wiktion...

I have a response variable (Yes/No) by visit with some missing values. I am considering imputing the underlying continuous variable in SAS using proc MI. After this process, I will have, let's say, M imputed datasets. How should I combine them into one dataset? In other words, how can I apply Rub...

One way to get into it is by using the Run dialog box using Windows+R. And then type %appdata% into it and hit enter. But not being able to cd into it is causing issues when trying to get to that folder from the terminal. Is it possible to make it work somehow?

I have the following picture: I tried to draw it with tikz: \documentclass[tikz,border=1mm,usenames,dvipsnames]{standalone} \usepackage{tikz, pgfplots} \pgfplotsset{compat=newest} \usetikzlibrary{patterns} \usetikzlibrary{calc,matrix} \usetikzlibrary{decorations.pathreplacing,calligraphy} \useti...

I have downloaded an early printed Beethoven sonata where the bass clef is upside down and looks more like a C? Why? What am I missing?

I have a simple circuit in TinkerCad with a 9V battery and resistor. Every time I alter the resistor, the voltage across it changes. 1 ohm resistor: 2 ohm resistor: 3 ohm resistor: The voltage on the resistor should remain constant (9v) regardless of the resistor value. What is the problem?