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TeX
TeX
00:37
1
Q: Arrows on small circles

StringerI'd like to draw arrows on small circles. The "decorate" method works well on large ones but the following \begin{tikzpicture}[scale=0.5, decoration={markings, mark= at position 0.75 with {\arrow{Stealth[width=2pt,length=3pt]}}}] \foreach \t in {0,...,7} { \draw[postaction=...

1
Q: Neo plugin -> Craft CMS Core ... is this idea still alive?

Marc With a look on https://craftcms.com/roadmap: I remember, there was a ticket to build a Neo alternative into the core of Craft CMS v5 (and a migration tool for existing projects with Neo). Unfortunately I can't remember the ticket ID or naming ... but it seems to have disappeared? I'm asking this ...

CS
CS
01:02
2
Q: The 2-coloring problem is in P class. But does it belongs to L or NL?

knorbikaHow can I prove that it is NL or L? I see that I should create a deterministic/nondeterminsitic algorithm with logarithmic space, but I have no idea how to store the coloring in logaritmic space.

01:22
3
Q: Why is the French Minister of Education's son accused of bypassing the national higher studies selection system by making a single choice of school?

WoJAmélie Oudéa-Castéra was recently designated as the French Minister of Education. She triggered a few controversies and the last one being that her son somehow bypassed the national system of selection for higher studies (called Parcoursup). He was a high school student in Stanislas, an elite pri...

1
Q: What is the problem with the recent "One-Shot Replace-by-Fee-Rate" Proposal?

MurchThere recently was a proposal to allow replacements that only beat the original by feerate, instead of by both the feerate and absolute fee. One-Shot Replace-by-Fee-Rate We can mitigate Rule #3 transaction pinning in a miner-incentive compatible way by replacing transactions (or alternatively, t...

7
Q: How to condition all cells of a notebook to a specific SeedRandom?

Tugrul TemelIs there a way to fix SeedRandom[.] for an entire notebook? If I carry out many calculations using random numbers, I need to give a separate code SeedRandom[45], for example, for each cell in the notebook. This is inefficient for calculations done in many different cells because I need to indicat...

4
Q: Converting Unicode Number Subscripts to Standard Mathematica Subscript Notation

LukeI am importing data data={"t*\[Alpha]₁","\[Alpha]₁*\[Alpha]₄"} But unfortunately, all of the subscripts are in Unicode: FullForm[data] List["t*\[Alpha]\:2081","\[Alpha]\:2081*\[Alpha]\:2084"] i.e. subscript 1 is encoded as \:2081 etc. Is there a way of converting these Unicode subscripts into M...

14
Q: Universal graph

Anton PetruninA connected (and infinite) graph $U$ will be called $n$-universal if any connected graph with degree $\leqslant n$ admits an embedding in $U$. Is there a 3-universal graph with bounded degree?

3
Q: Are energy-momentum relation equations still valid with speed of light?

Axel TogawaI'm confused about the theory regarding the energy- momentum relation when I consider the speed of an object being $v = c$. Using for example the relations $$E^2 = (pc)^2 + (m_0c)^2$$ $$E = \gamma_{(v)}m_0c^2$$ $$\textbf{p} = \gamma_{(v)}m_0\textbf{v}$$ to find that $m_0 = 0$. I want to ask how ...

01:44
1
Q: How can I list services and timer units with systemctl which can be enabled after installing new unit files?

LiveWireBTMy situation I installed a few new unit files under $HOME/.local/share/systemd/user/ ls -1 $HOME/.local/share/systemd/user/ some.service some.timer some_other.service I ran the following command to have them loaded properly: systemctl --user daemon-reload They show up in auto completion of syste...

DIY
DIY
2
Q: How to keep squirrels off of a 4x4 post that's already in the ground?

EJoshuaS - Stand with UkraineI have a 4x4 wood post that's quite tall (probably 8 - 10 feet) that's used to hang lights and bird feeders. In particular, I have a suet feeder hanging from a hook about 4 feet off the ground. Unfortunately, the squirrels keep climbing the post and eating the suet. I don't dislike squirrels, but...

02:28
1
Q: How to Convert a manual steering system into autonomous steering system, the should have the ability to steer in both manual and autonomous mode

Geetika YadavWhat kind of actuator might be used to covert a manual steering system to Autonomous steering system. Currently, I am having a small buggy with manually steering, containing a steering ratio of 4:1. I was trying convert the manual steering system to steer automatically. But, the point here is, th...

1
Q: What Happened to MD3 in Rivest's Series of Hash Functions?

hanshenrikRonald Rivest designed MD2, MD4, MD5, and MD6, but what about MD3? Was it skipped? Or perhaps kept private and never publicly released? (edit: found a related question)

02:55
4
Q: Imaginary numbers in PCA output

jbuddy_13Using PCA manually on correlation matrix, I'm getting imaginary numbers in both eigenvalues and eigenvectors. Is this expected behavior? I understand that when interpreting a matrix as a linear transformation, the eigenvectors can be thought of as the "principal effects" of the transformation. Th...

DIY
DIY
03:15
1
Q: For How Long can a Sump Pump Run Before Damage Occurs?

CalifornianTL;DR: is a duty cycle where a 1/4 HP submersible sump pump is repeatedly running for [3 minutes pumping wet, 12 seconds pumping dry, 4 minutes off] going to damage the pump appreciably? Long version: I have a sump pump, but the float switch will not work with the hacky sump pit setup we have (un...

03:40
5
Q: What is the "problem" with directly coupled amplifiers?

EE18As in the title, my question is basically about understanding what is the "problem" with directly-coupled (below, I will use dc for "directly-coupled" and DC for "direct current") amplifiers which necessitates the use of coupling amplifiers? Note that this question is being asked in the context o...

03:58
2
Q: Who is navigating the ISS?

Beyhan ÇıtakThe ISS orbits arount the world. But like a plane pilot, do astronouts fly the ISS on Earth's orbit? If wanted, can the ISS go to a specific part of the world apart from the the usual orbit? Does the ISS need a powerful fuel while orbiting?

DIY
DIY
1
Q: How do I reinforce wall anchors used to hang kitchen cabinets?

BluebirdThe IKEA kitchen cabinets were installed according to their instructions, approx. 6-8 inches between each screw on the rails. But as there wasn't appropriate studs for each screw, some used wall anchors. In short, each rail has at least 3-4 screws into studs, with the rest (shown in photo) as wal...

2
Q: Dog licks - kashrut status of dog saliva?

Rabbi KaiiWhat is the kashrut status of dog* saliva? This question is about what regularly eating treif does to the kashrut status of their saliva. *(or any animal that eats treif or other unkosher food)

TeX
TeX
04:22
2
Q: How can I represent a math formula as a figure?

alperI want to represent a math formula as an figure instead of an equation. My code: \documentclass{article} \usepackage{mathtools}% Loads amsmath \begin{document} \begin{equation} \underbrace{x\ .\ y}_\text{$S_{v}$}. \underbrace{z}_\text{(e)} \end{equation} \end{document} wanted output:

2
Q: How to get rid of \def

BazinI was recently required by a journal to getting rid of \def in the definitions of my personal macros. It turns out to be not-so-easy and the naive replacement of \def by \newcommand does not always work. Is there a standard way of doing that? Let me give two examples: (1) \def\res{\texttt{Res}\le...

04:46
3
Q: How do I plot the desired phase space diagram with an iron cables-like structure?

user444I want to plot the phase space diagram of the Lorenz attractor shown below on the top figure; however, I can only plot the bottom figure in Mathematica. phase = Block[{a = 10.0, b = 28.0, c = 8/3}, NDSolve[{x'[t] == a*(y[t] - x[t]), y'[t] == x[t]*(b - z[t]) - y[t], z'[t] == x[t]*y[t] ...

05:10
1
Q: Can I travel to Switzerland from Germany?

StaI’m a US permanent resident and holder of US refugee travel document. I’m planning to travel to Germany (Germany doesn’t require a visa for holders of US refugee travel documents). But I’m thinking if I fly to Germany and decide to go to Switzerland or Austria by car or train, can I do it without...

05:29
3
Q: How to stop disabled Google Assistant popping up on home button long presses?

user56reinstatemonica8I don't use Google Assistant, so I disabled it by opening the Google app, then going to settings from the profile icon, then "Google Assistant" settings, then "General", then toggling off the top toggle. However, sometimes the device thinks I long-pressed the home button (e.g. if I swipe up too...

2
Q: What is the biblical basis for the concept of "activating", "triggering", or "igniting" God's promises?

MarkThe concept can be found in several Christian sources: GOD’S PROMISES AREN’T AUTOMATED, THEY’RE ACTIVATED 3 Keys to Activating God’s Promises in Your Life Activating the Promises of God: Unlock the Power of the Bible & Empower Your Life "Perhaps they did not believe that such a simple action ...

05:53
6
Q: Complete a Mystery Sequence

nyxbirdGiven a sequence of three integers, determine if the sequence is arithmetic (of the form [a, a+d, a+2*d]) or geometric (of the form [a, a*r, a*r^2]) by outputting a fourth term that completes it (a+3*d for arithmetic, a*r^3 for geometric). Examples: [1, 2, 3] -> 4 (This is an arithmetic sequence ...

Law
Law
06:14
3
Q: Can a civil court impose criminal contempt charges?

PyrotechnicalFor a 2nd time, Donald Trump is being sued by E. Jean Carroll for defamation charges relating to his ongoing defamatory actions towards her. The 1st lawsuit relating to these litigants occurred in May 2023 and resulted in a jury finding Trump liable to the tune of $5 million. This 2nd lawsuit rel...

06:58
2
Q: What did Kant mean by a "whole of cognition" in the Metaphysical Foundations of Natural Science?

Gerry"Every doctrine that is supposed to be a system, that is, a whole of cognition ordered according to principles, is called a science.". From second paragraph of the preface to the Metaphysical Foundations of Natural Science, 4:468. I realize he is saying that a "whole of cognition" is the same as ...

1
Q: Is it possible to maintain a subfolder structure for apex files outside of the local dev IDE environment?

HoudiniI am aware that I can create subfolders in my classes folder under force-app folder in VS code. However, once I deploy these classes to my org and if they are pulled by another dev, is there a way to retain this subfolder structure? I notice this structure disappears completely outside of my loca...

1
Q: Are there any forces that are inversely proportional to the fourth power of the distance involved?

user267545As I humbly asked on Astronomy SE, I was wondering if there any forces or similar phenomena that scale inversely proportionally to the fourth power of the distance. There are plenty of things that obey the inverse-square law and thus are inversely proportional to the square of the distance (light...

2
Q: In electronic music, what makes "bass" bass?

Ken - Enough about MonicaMany bass presets for various synths in the DAW sound relatively high-pitched even when the piano roll contains notes in the first/second octave(s). Since these presets are shipped as part of professional software (e.g. Ableton), and since the notes they are asked to play are in the presumable b...

1
Q: My ceiling fan preference is to have 5 blades because it's quieter. Do helicopters ever have 5 rotor blades. Why?

Lenny C.My home ceiling fans have 5 blades to reduce the wopwop sound in a quiet room. It probably also moves air more efficiently at a lower spin rate. Can a helicopter operate properly with 5 blades?

Vi
Vi
1
Q: Please explain/provide example of difference between gd and 1gd commands?

d.kI was reading the vim :help docs and stumbled upon the gd and 1gd normal mode commands. But I haven't been able to grasp what's the difference. The docs says: *1gd* 1gd Like "gd", but ignore matches inside a {} block that ends before the cursor position. I trie...

 
1 hour later…
08:10
1
Q: iterm2 to honor /etc/paths with bash

xptI use Bash as my preferred shell, but the PATH values are different in my iterm2 and my Terminal (which honors my /etc/paths). How to have iterm2 to honor /etc/paths with the bash shell? More details: Both my iterm2 and my Terminal are using Bash as my preferred shell: They're both starting fro...

08:32
3
Q: Python Commercial Use of Software Licensing Compliance

ghawesI have a Flask application that is being sold to a client. I remain in control of the source code, and it is a private repo. I wanted to ensure I was not violating License Agreements, and ran a tool to check the licensing of each Python repo from my requirements.txt file: https://github.com/FHPyt...

09:12
2
Q: COBOL Databse Program

drake14wFor a school project I've created a database program in COBOL and now that I'm finished, I have to write a report on the project. As one aspects of the report, we have to discuss whether the product (the program) achieved all of the "success criteria" we created earlier in the process. One of my ...

1
Q: Bash [[ test =~ regex ]] vs perl command result

rellampecIs the bash operator =~ equivalent to a perl invocation? filename="test-33.csv" regex="([^.]+)(-\d{1,5})(\.csv)" With bash test: if [[ "$filename" =~ $regex ]]; then echo "it matches"; else echo "doesn't match"; fi # doesn't match if [[ "$filename" =~ ([^.]+)(-\d{1,5})(\.csv) ]]; then echo "mat...

2
Q: Unknown Wi-Fi SSID detected - is it a danger?

Dimitris KollarosI see an available connection "Eliza" in my area. How can I check if this is a danger to me?

2
Q: Screen space reflection makes my object darker

blender breathI'm applying a texture which was set up by @ChristopherBennett. The texture works well (Using EEVEE Render) until I turn on space screen reflections, which makes it darker, and the objects loses it's anisotropic rays. I have provided the Blend file for further insight.

CS
CS
1
Q: Guard line preventing leakage current

user42423I understand that we put a guard line (which is almost at the same potential as the positive voltage) to prevent leakage from positive line to negative line. Is it possible there is a leakage from the guard line to the negative line as shown below?

09:38
2
Q: 大葉 vs 紫蘇 for shiso leaf

arturompWhat is the difference in usage between 大葉(おおば) and 紫蘇(しそ)? Are there any implications or nuances in the usage of either? I've seen more 大葉 in the supermarket.

RPG
RPG
1
Q: How does negative energy interact with shadow dragons?

SonkuragariI'm going to be running a shadow dragon in a game soon and after reading this question, Are negative levels necessarily energy drain? I became confused about how negative levels and negative energy would affect a shadow dragon since it's not undead, yet it bestows negative levels with it's breath...

10:21
1
Q: What kind of sanctification/purifying was done in Joshua 3:5?

PhilipWhat or how exactly did all Israel purify/consecrate themselves according to Joshua 3:5? "And Joshua said to the people, 'sanctify yourselves, for tomorrow the Lord will do wonders among you.'"

2
Q: How much energy would this robot need?

TerraPlease forgive me if this isn't the right part of Stack Exchange or if my knowledge is poor. If you need to tell me about anything scientifically I encourage you to simplify it so me and other laymen can understand. I notice that robots today need a lot of energy so I decided to run a little test...

11:05
1
Q: What is the lightest chain lock that would present difficulty for bolt cutters?

TylerDurdenI was told in a bike shop the other day that the Kryptonite Keeper 785 chain has been tested and can’t be broken with a bolt cutter. I was really looking forward to getting one of these because at the moment I’ve been using a similar motorbike chain from eBay except that it’s 1.8m and quite heavy...

CS
CS
1
Q: Does utility representation theorem need locally-nonsatiated as a condition?

NonenichtI'm reading MWG's Microeconomics, and I'm a bit confused about the utility representation theorem. It states that a rational and continuous preference relation can be represented by a continuous utility function, but in the proof it gives, monotonicity is used as a condition. Further, in the next...

14
Q: What's the area of the triangle in this geometry problem? I think I can solve it, but it's way too convoluted...

zlaaemiI am trying to solve this geometry problem from an exam. The exam is supposed to be 3 hours long and this is supposed to be 1 out of 10 problems. So given that, the solution should be something quick, but the only solution I've been able to find is extremely convoluted and realistically I'd neve...

11:52
2
Q: Potential intonation problems by having a 0.5" difference between half scale lengths?

OwenI don't know if this is the right place to ask this but I saw someone ask a similar question here. I'm assembling a guitar from a body I bought for cheap. Unfortunately, the body won't line up correctly with any 24.75" scale length neck (Gibson Les Paul style body). To correct the issue I may be ...

3
Q: Why is cyclooctene the smallest cycloalkene to have cis-trans isomerism?

Tankman6What prevents cis and trans isomers from existing in smaller cycloalkenes, for example, cyclohexenes for more than a short period of time?

CS
CS
12:15
1
Q: Are there any tricks for measuring high voltages ~1000V efficiently?

DrewThe simple way to measure voltages above VDD is to use a resistor divider. However, once you get into the 100s of volts these dissipate significant power. For example, one of my current designs measures up to 400V using a resistor divider with 2.4Mohms on the high side and 20k on the low side. Th...

12:35
3
Q: Saying Yishtabach in one breath

Curious YidWhat is the reason for having to say the “15 expressions of praise” in Yishtabach in one breath? My own potential answer is maybe it’s to show that there’s so much praise to say about Hashem and even this limited amount we can’t even say without running out of breath

13:00
1
Q: recurrence integral error

moon riverI am having problems with 3a). I basically managed to prove the required expression (recursive formula) except for the nasty little "n" coefficient term. Please see working out below.

13:19
1
Q: Search a particular string with grep

sunny_hkhkI want to search in a file with a particular string and show only those lines that exactly match with the string but that doesn't seem to work with grep -w. This is just an example as I would be searching for a string in a script and then want to display only those line that exactly matches, not "...

CS
CS
13:44
1
Q: pick K random integers without repetition

bihariforcesSuppose we've to pick $K (\le N)$ random integers in range $[0, N - 1]$ for very large $N$ such that there is no repetition, while also deterministically minimizing number of calls made to $rand()$ function, how would we do it? Assume $rand(X)$ produces a random integer in range $[0,X - 1]$, call...

3
Q: What is the source of this quote within Agatha Christie's The Mysterious Mr Quin?

verboseIn Agatha Christie's short story "The Face of Helen," Mr Satterthwaite sees an extremely beautiful young woman named Gillian West. His first impression is that she ranks with legends such as Cleopatra or Helen of Troy. Later, he realizes that apart from her extraordinary beauty, she is an ordinar...

RPG
RPG
14:08
3
Q: Amulet of Betrayal and Stunned condition

Lord Dark LightThe Amulet of Betrayal from Chains of Asmodeus says You can use a bonus action to move one of the following conditions from yourself to an ally within 60 feet of you: blinded, deafened, frightened, poisoned, stunned, exhaustion. When transferring exhaustion, move all your exhaustion levels. If t...

TeX
TeX
14:27
1
Q: TeXShop only inserts first 60 photos of 70 in book

mh2000Preparing book with 70 images and only first 60 are put in. Using graphicx. Calling files: \addphoto{IMG_6977.jpg} \addphoto{IMG_4494.jpg} \addphoto{m - 159.jpg} \addphoto{IMG_0853.jpg} \addphoto{IMG_3386.jpg} \addphoto{m - 40.jpg} \addphoto{IMG_3529.jpg} \addphoto{IMG_7007.jpg}. <- Error occurs ...

3
Q: How to make a plausible foot-based mercenary nomadic tribe work in a Late Medieval Setting?

WolfensniperThe background of the World setting is similar to 15th Century Europe with low-magic. The tribe in question is a sub-race of human, but having a culture similar to IRL Romani People, who roams around the continent in different groups without settling down (or are forbiddened to do so), often met ...

14:50
1
Q: Is there any hope that Mathematica answers this parametric integral?

math2021Is there any hope that Mathematica answers this integral? Integrate[ Exp[a (b/(c + 2 (1 + x) d)^4 - (e + f/(c + 2 (1 + x) d)^2)^2/( 4 (2 + x + g)^2))], x] with these assumptions on parameters a < 0 && b > 0 && d > 0 && e < 0 && f < 0 && g < 0; the parameter $c\in\mathbb{R}$ can be positive...

7
Q: Does such a convergent series exist?

HenryThis is the question that arose in my mind while contemplating the convergence of this series: $$\sum_{n\geq 1} \frac{\sin(\sqrt{n})}{n}$$ In this problem, if we assume $A_N = \sum_{n=1}^{N}\sin(\sqrt{n})$, and consider the method of partial sums: $$\sum_{n=1}^{N} \frac{\sin(\sqrt{n})}{n} = \fra...

15:12
2
Q: Find function by solving equations and imposing constraints

Pabitra TripathySuppose there are two equations: $$2f(x)+x^2g(x)=8 \tag{1},$$ $$ x^3f(x)+6g(x)=18 \tag{2}.$$ I need to solve these two equations and find the functions $f(x)$ and $g(x)$ in terms of $x$ and constants. The constraints for the functions are: $$\begin{align*}f(0) &= 9.5,\\ g(0) &= 49,\\ f(x) &\sim 5...

2
Q: Why doesn't AsymptoticIntegrate work?

user64494The following asymptotic AsymptoticIntegrate[Sqrt[n^2 - k^2], {k, 1, n - 1}, {n, Infinity, 1}] fails in 13.3 on Windows 10, returning the input. However, the following Assuming[n >= 3, AsymptoticIntegrate[ Sqrt[n^2 - k^2], {k, 1, n - 1}, {n, Infinity, 1}]] 1/(6 n) + 1/(5 Sqrt[2] Sqrt[n]) - (2 ...

ELL
ELL
2
Q: Is it correct to say "The heater must have gone off."?

AR AMhttps://dictionary.cambridge.org/dictionary/english/go-off on the above address you can see: It's getting cold. The heater must have gone off. why there is "have" instead of "has"? isn't "the heater" a singular noun?

15:36
2
Q: Children's game about a hotel for fantasy creatures

user73910I remember an old computer game that seemed to be geared towards children. It was about managing a hotel that would be visited by fantasy creatures. The goal is to ensure that all of the guests are accommodated and satisfied. One of the possible guests that you could get is a group of vampires, w...

15:56
2
Q: Help to identify author please

Ñ 3ink[![Who is that author][1]][1] Here are the seals Please review photos [chop][2]][2] Zoomed in Please let me know [1]: https://i.sstatic.net/IJZHW.jpg [2]: https://i.sstatic.net/RFyK3.jpg

AI
AI
1
Q: Human trainers: collect data by 2-alternative force choice (2AFC)

MegiddTo collect human intelligence data, we intend to use 2-alternative force choice (2AFC). A sample human intelligence task (HIT) is shown below. Can it be considered a 2AFC? Is such a HIT considered acceptable to collect data from trainers? Two choices are provided, i.e. A and B. Trainer can pick A...

1
Q: ArduinoJson- unexplained '.size()' behaviour

guydI'm using ESP8266, ArduinoJson v6.21.5. PlatformIO, Vscode. Config file is saved and read correctly to esp8266's flash: { "gen_pubTopic": [ "DvirHome/Messages", "DvirHome/log", "DvirHome/debug" ], "subTopic": [ "DvirHome/Light/int/KitchenLEDs", "...

TeX
TeX
16:18
1
Q: passing parameter to a trig function to draw nodes

Abdul fatah Sawan\begin{tikzpicture} \pgfmathsetmacro{\a}{45} % angle \pgfmathsetmacro{\da}{45} % delta angle \node [] at ( cos{\a+\da}, sin{\a+\da}) {2: \a+\da}; \end{tikzpicture} When passing 2 parameters to cos, I get a different value. for example, if a=90 and da=0 I get a node and if a=45 and da=45 I get ...

1
Q: which soil is better mud like brown soil with lots of worms or black colored soil with no worm?

DiniI have like 1 year old soil and it is mud-like brown colour and texture with lots of composing worms if I dig even the surface, vs the new soil I bought that black colour and a bit granule like texture with zero worm. so which one is healthier for plants? because I’ve read that worm presents mean...

2
Q: What plant is it? Why its leaves look weak now than the first time I bought it?

Dini Did I underwater it. Is it because the sunlight or just needs fertilizer? It’s been a week. I just move it outside this morning though. It’s not direct sun and I fertilized it with mono potassium phosphate this morning also

2
Q: Does molten metal liquid chromatography exist?

ericnutschLiquid chromatography is used to analyze and purify different chemical samples in a solvent. It is also used for industrial scale chemical purification. I was wondering if something similar exists for liquid (generally molten) metals. I have not been able to find any examples online, but I may be...

16:40
2
Q: Mixed-level class of undergrads and PhD engineers: grading on different curves

curious_catI teach an elective chemical engineering mixed-level class. About 30% are 3rd year and 4th year undergrads each and the remaining 40% is a mix of Masters and PhD students. I want the grading to be fair to everyone. Clearly the advanced students have an advantage in terms of pre requisites etc. W...

1
Q: Taproot Output Scripts

markI am trying to look more into taproot output scripts and was wondering if someone could help me on how to access them? I was thinking of using a blockchain explorer that decodes Taproot scripts but I can't seem to find any.

DIY
DIY
3
Q: What to do about cold spots on new electric heated floor?

GREXTAI just had a new remodel done which included electric in floor heating. During the install they set the wires with leveler which ultimately sealed them in place. They sent me photos of the progress done because I had asked that they keep me in the loop before they do anything irreversible. Well, ...

17:05
2
Q: Overseas Teaching of ABRSM Piano Students

PrimadonnaI am Australia based. Can I teach online to my Singapore based student; and will I then be allowed to teach and enrol him in ABRSM Piano exams from Australia that he will complete in Singapore? Does ABRSM mind if the piano teacher and student do not reside in the same country?

17:26
2
Q: Current pronunciation of ancient impartait ending -oit

Marcos GonzalezUp to the end of the 18th century, it was common in literary French to use the -oi- diphthong for the imperfect singular, writing e.g. “il regardoit” instead of the modern “il regardait”. How is one supposed to read the old ending nowadays? What was the contemporary mode of pronunciation?

18:10
1
Q: What is the TRL of a skyhook?

The Rocket fanA recent answer on this question mentioned that skyhooks have a low TRL. This is probably due to many factors since they have not been built yet. What is the current TRL/status of skyhooks and what is the next step needed to get them to a higher TRL?

11
Q: Do we know if toasters exist?

komodospIn Battlestar Galactica (2004) - a common derogatory term for a cylon is a "toaster" (as in implying they are nothing more than simple common machines). However, since the characters are in a futuristic civilisation that does things a little different to we do here on Earth, I have often wondered...

TeX
TeX
18:33
2
Q: `section` is reset upon changing a chapter?

AtomThe amsthm documentation states: If any theorem elements are numbered by section, and (in a book) the first such element in a chapter comes before the first section, numbering will continue from the previous chapter. In such a case, reset the counter by invoking this command before the affected ...

2
Q: Scale length of guitars

TimJust about every guitar will have its own quoted scale length, for the open strings. But - which string is being quoted, as there will always be a difference between the strings, notably the top and bottom, of up to 0.5"?

18:55
2
Q: How to color the inside of a box

NexgenI haven't found any explanation on how to color the inside of an object (in my case a box for a perfume) especially when the box has more than one layer (I don't remember seeing a video on YouTube of boxes with a colored inside, I saw that their insides is identical to their outsides, either by c...

TeX
TeX
1
Q: Merge cells in a table

Carolina CastroDo you know how can I merge 4 cells from two different collums and two rows? Can I use both multicol and multi row? Thanks \multicolumn{2}{|c|}{Population to serve}\multirow{2}{6cm}{Population to serve}

2
Q: Numerically compute the eigenvalues and eigenstates of a two-order partial differential equation

basic nutshellThe objective is to numerically compute the eigenvalues and eigenstates of a stationary Schrödinger equation in an arbitrary polynomial potential. The equation takes the form: $$ \left[-\frac{1}{2}\frac{\partial^2}{\partial x^2} + V(x)\right] \psi(x) = E \psi(x) $$ where, for example, $V(x) = x^2...

GIS
GIS
1
Q: How do I delete or hide features in QGIS in one layer based on the value of the feature in another layer?

Marcus K.I have two tiff-tiles which are maps of the exact same area: One of them displays the height of each cell in the area while the other displays an identification number of the same cells. What I was hoping to do was to be able to do in QGIS was to mask or hide cells in the height map by using th...

19:18
2
Q: Position/meaning of deshalb in this sentence

Ian WongI learned from my German course that deshalb is a connector and introduces a HS: Max möchte in Berlin studieren, deshalb lernt er Deutsch. I came across the following phrase and can't figure out why deshalb is at this position: Wir haben einen kleinen Hund, von dem sich meine Kinder nicht tren...

5
Q: Does completeness of the theory of a bijection without finite orbits depend on choice?

George HaydukeConsider the following sentences in a first-order language with one unary function symbol $f$: $\forall x \exists y (fy=x)$ $\forall y\forall z(fy=fz\to y=z))$ $\forall x (\underbrace{f\dotsb f}_{n\mbox{ times}}x\neq x)$ so that any model of them is just a set equipped with a bijection with no fi...

19:41
10
Q: Aquatic Giants – Heyawake / Marching Bands

JafeThis is part 52 of the puzzle series Around the World in Many Days. Each part is solvable on its own. “One, two, three, four, five, I love marine wildlife.” – unknown Dear Puzzling, The grid on the left-hand side is a Heyawake puzzle. Shade some cells in the grid. Shaded cells cannot share an ...

CS
CS
2
Q: Is 3004M1C a photodiode or a phototransistor?

lukaslThe datasheet describes the 3004M1C as a "high speed and high sensitive PIN photodiode". Distributors also label it as a photodiode. However, the datasheet mentions "Collector-Emitter Breakdown Voltage", "Emitter-Collector Breakdown Voltage", "Collector-Emitter Saturation Voltage", which seems to...

5
Q: What is the volume of this shape, and how can I calculate it?

DrZ214 I have this shape with 7 vertexes as specified. You start with a unit square, then at one back edge, two vertexes go directly above the bottom two with a height of h. Then a special final vertex lies halfway between the previous two (in the xy plane), but only half as high. I decided to keep h a...

2
Q: Dependent variable is a bounded between 0 and 1

NutellaMonsterI need to test some hypotheses for a social sciences dissertation. In my description below, I refer to the independent as the Xs and the dependent variables as the Ys. I have jotted down what models/tests I think I can use for this hypothesis. However, due to the nature of variables, I am uncerta...

GIS
GIS
20:06
3
Q: Automatically add latitude and longitude field upon creating a point feature in QGIS

Redowan SakibI need to create two fields in the attribute table that automatically takes the latitude and longitude of the point features that i digitize, without running any other command or update. When i create a point feature it must not ask me the value of latitude and longitude field and calculates it a...

20:25
4
Q: Is it ethical to be ethical towards the unethical?

causativeSuppose there are some criminals who have no respect for ethics and will lie/cheat/steal/kill whenever they perceive it could gain them some advantage. Suppose that to treat these people with fairness and decency - refusing to lie to them, obeying the law in regard to them, refusing to cheat or s...

1
Q: Unable to add the Signature saved as Image in the ContentDocument in the PDF created using VF and Apex

PrateekI am using canvas to capture the User Signature in an LWC Component. After capturing the signature, I store that in the ContentDocument object and try to overlay it on the VisualForce Page which is used to generate a pdf file. APEX Code @AuraEnabled(cacheable=false) public static void generateSer...

2
Q: Must the Israeli - Palestinian conflict be solvable in the forseeable future?

Jacob3Have any prominent politicians expressed their acknowledgement that the Israeli - Palestinian conflict seemingly has no natural (and humane) solution in the foreseeable future? Same question in a bit different phrasing: Some people would agree that "the last few decades have shown that all propos...

3
Q: Game involving envelopes

John DavidSuppose we have $E$ envelopes with envelope $i$ having some amount $S_i$ of dollars in it. We suppose the $S_i$ are independent copies of $S$ for which $P(S \leq s) = \frac{s}{\sqrt{s^2 + 1}}$. Let us open the envelopes one at a time. After opening an envelope $i < E$, we have to decide whether w...

2
Q: Linear regression when independent variable are count data

NutellaMonsterIn my upcoming social sciences dissertation, I am delving into testing hypotheses that explore the relationship between certain variables. In my framework, I've categorized these variables into two groups: the independent variables, which I refer to as the Xs, and the dependent variables, known a...

21:14
1
Q: What is the reading of "toy store"?

Ned ReifThere seem to be various readings for toy store. Do they have different meanings? Are they regionalisms? 玩具店【おもちゃてん】 玩具店【おもちゃみせ】 玩具屋【おもちゃや】 玩具屋【がんぐや】 玩具店【がんぐてん】 I came across it in this sentence in the following article: 税込【ぜいこ】み8250円【えん】で、全国【ぜんこく】の玩具店【がんぐてん】などで販売【はんばい】する The product will be sold...

GIS
GIS
2
Q: Wrong parameters when georeferencing single drone images

nmhngI am using a DJI Mavic 3M drone to capture images from the ground view. DJI provides a guide on how to correct the images for the lens distortion. Each captured image contains XMP metadata about the GPS location of the drone, the yaw, pitch and roll angles of the gimbal, matrix parameters for und...

21:33
5
Q: One Time Pad encryption in Python

VesselI made this code to encrypt a string with the One Time Pad method. Is this pythonic code, and are there obvious ways I can improve? The program accepts a plaintext and can either accept an inputted key or generate one itself. It adds the key and plaintext character by character, keeping it within...

1
Q: Why is Simple Pendulum not SHM?

High School StudentWhy does Simple pendulum's motion not hold as SHM for large angles, only for small angle approximations? The restoring force is still directed towards the mean position. I know mathematically the reason is because at large angles it is not linearly proportional to displacement, but how do I make ...

3
Q: Proving inequality with non-integer powers

Jacob LundbergGiven $1 > \tau_1 > \tau_2$ > 0 and $\varepsilon > 0$, how do I prove this inequality? $$\dfrac{(\varepsilon+1)(\tau_{1}-\tau_{2})}{(1-\tau_{2})^{\varepsilon+1}-(1-\tau_{1})^{\varepsilon+1}}<(1-\tau_{2})^{-\varepsilon}$$ I've tried various rearrangements and derivatives. I've verified numerically...

21:57
1
Q: Paying mana cost, Targeting, Sacrifice, and Ward

L.P.My opponent has Kykar, Wind's Fury, a 1/1 Spirit Token, and 5 lands (that produce any mana.) The only creature I control is a 6/6 Trample, Ward {1}. Opponent has a Switcheroo in hand and his goal is to exchange control of a 1/1 Token with the only creature I control. Is my opponent able to do thi...

1
Q: Dependent variables are count variable with an upper bound

NutellaMonsterI need to test some hypotheses for a social sciences dissertation. In my description below, I refer to the independent as the Xs and the dependent variables as the Ys. I am expecting a straight linear relationship between the Xs and Ys, like Y = mX + C. The Xs are a "continuous" variable that wil...

22:21
1
Q: Can normal reaction result from a pull?

SynthiaI have understood the direction of normal reaction , but I'm confused whether it may result from a pull also or it results only from a push?

22:45
2
Q: What is a counter to Yone in top lane?

DibidusI am a starter in League of Legends, and I think a lot about the game. Now, what is the counter to Yone on top? On mid he is permaban (I just pick whatever tank to Yasuo or go duo). But on top there are smarter things to ban (like Mordekaiser). I know Aatrox can be good against Yone. On op.gg and...

2
Q: Vegan Fukuro Shinai

WilQuI need a fukuro shinai to practise kenjustu (Kashima no tachi). I’m vegan and Fukuro shinais are typically covered with leather, and I think the shinai itself contains some parts that are made of leather. Is there any version of this weapon that is made without using any animal product? If not, i...

23:04
3
Q: How to start learning philosophy and overcome my bias towards mathematics?

pieI am interested and curious about philosophy, especially topics like morals, justice, ethics, etc. I want to read books that explain the philosophy behind them. However, I am very ignorant and I don’t know anything about philosophy, so I have no idea what the different branches or ideologies or s...

1
Q: Applying material to a cube

ДанилI don't speak English well, I hope you will understand me. I'm new to Blender and I'm facing a problem. Thank you all for the answers! When I apply the material to my object, the drawing on the upper face deforms. The grinding pattern turns out to be circular. Are there ways to fix this and make ...

2
Q: How do I draw perovskite structure with own without CIF file?

Cho-HeeI just wonder if there are any chemistry drawing software to draw a hybrid perovskite structure ?

23:27
1
Q: 'I think IT unlikely that our team can win'. <--Is IT the object?

cookie234 We think it unlikely that our inexperienced team can win a single > game this season. Is "it" the direct object? If it is, what is the function of the noun clause "that our inexperienced team can win a single game this season"? Is it connected to "it" in any way? Thank you very much.

2
Q: Characterization of distance between points in separable space

PorcupineI want to prove that if $X$ is a separable metric space, then for all $x,y \in X$ and any dense set $\{x_i\}$, we can write: $$d(x,y) = \sup_{i \in \mathbb{N}} |d(x,x_i) - d(y,x_i) |.$$ Some attempts. One side: fix $x,y$, by denseness there exists a subsequence $x_{n_{k}}$ of $x_n$ such that $x_{...

23:52
2
Q: SearchKit configuration management

ChumKuiWe have quite a few SearchKit searches and now associated search forms associated with them. I am trying to understand how CiviCRM manages these files and what the best practice is for configuration management of these items. The searches themselves along with any assoicated tables, lists etc ap...

1
Q: Where does Magento 2 save session?

Bruno Depieri BarduchiWhere does Magento 2 save session files? According to the documentation, it is possible to save in the database, in redis, in memcache or in files, but in the default installation it looks like this. 'session' => [ 'save' => 'files' ], I checked the var/session folder and there is nothing, not ...

1
Q: Assistance identifying an op-amp marked "H2P IFA"- includes photos

EBlakeI'm looking for help identifying this chip, which I believe is a dual op-amp (pin 4 is grounded, pin 8 is power). Package appears to be QFN, possibly with a pad (there are no vias under the chip). I suspect an op-amp because of the application (analogue sensor signal conditioning board) with seve...


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