text stringlengths 1 1.11k | source dict |
|---|---|
python, python-3.x, sqlite, tkinter
self.button = ttk.Button(parent, text='Start', command=self._button_click)
self.button.state(['disabled'])
self.time_label = ttk.Label(parent, text='00:00', font='Segoe 16')
self.project_label.grid(row=0, column=0, padx=2, pady=2, sticky=W)
self.pro... | {
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"tags": "python, python-3.x, sqlite, tkinter",
"url": null
} |
python, python-3.x, numpy, converting
def fixem(things):
final = None
results = [fixit(thing) for thing in things]
floats = [r for r in results if type(r) is float]
arrays = [r for r in results if type(r) is np.ndarray]
others = [r for r in results if type(r) not in (float, np.ndarray)]
if l... | {
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"tags": "python, python-3.x, numpy, converting",
"url": null
} |
computer-vision, opencv, object-recognition
I want to check if I am on the right track. Do you have any suggestions on how to improve my approach? If somebody worked on something similar, I would appreciate any useful tips, resources (and criticisms) on this problem. I can see a number of possible problems with this ... | {
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"tags": "computer-vision, opencv, object-recognition",
"url": null
} |
javascript, node.js, server, express.js, neo4j
exports.DownvoteComment = function(username, commentId, result, callback) {
performVotes(["User", "username"], ["Comment", "id"], username, commentId,
function() {
queryDB(
"MATCH (user : User {username : {uname} })" +
... | {
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"id": 22877,
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"openwebmath_score": null,
"tags": "javascript, node.js, server, express.js, neo4j",
"url": null
} |
First, we’ll create a function $p(n,d)$ that outputs how many factors of $d$ are included in $n!$. We have that
$p(n,d)=\left\lfloor\frac{n}{d}\right\rfloor+\left\lfloor\frac{n}{d^2}\right\rfloor+\left\lfloor\frac{n}{d^3}\right\rfloor+ \cdots+\left\lfloor\frac{n}{d^r}\right\rfloor,$
where $d^r$ is the highest power of ... | {
"domain": "jasonbhill.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9875683469514965,
"lm_q1q2_score": 0.8508278618124334,
"lm_q2_score": 0.8615382058759129,
"openwebmath_perplexity": 1737.7390952399246,
"openwebmath_score": 0.4279261529445648,
"tags"... |
c, compiler, lexical-analysis
//identify token type
if(!tokenTypeSet){
token[current_token]->ttype=number;
tokenTypeSet=1;
}
token[current_token]->t[in++]=input[c];
//detect end of token
if(WHITESPAC... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c, compiler, lexical-analysis",
"url": null
} |
power-spectral-density
Title: PSD using MATLAB's $\tt pwelch$ algorithm window length and measure units When using pwelch algorithm in MATLAB for a signal with $N$ samples,
Is there a good rule of thumb for determining the length $L$ of the sections (second variable for the function)?
And assuming my input is a volt... | {
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"openwebmath_score": null,
"tags": "power-spectral-density",
"url": null
} |
php, mysql, symfony2, doctrine, symfony3
return $this->findByParent($renewalFindParent->getParent());
}
$newParent = $this->findOneBy(["contractOld" => $renewalFindParent->getcontractRenew()]);
if ($newParent) {
return $this->findByParent($newParent->getParent());
}
... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "php, mysql, symfony2, doctrine, symfony3",
"url": null
} |
python, r, clustering, k-means
Choose a $k$ as the initial number of clusters and produce $k$ arbitrary Gaussian kernels (i.e. with arbitrary $\mu$ and $\sigma$)
Use Expectation Maximization algorithm for updating the new clustering structure at each step.
Spectral Clustering
Define a Similarity Matrix from the data ... | {
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"tags": "python, r, clustering, k-means",
"url": null
} |
# Fast way to manually calculate percentage increments/decrements
I'm currently studying for the GMAT exam, and I'd like to know if there's a way to manually (and quickly) determine an increment/decrement percent between two numbers.
I know for example, that if I take 5 as my $100%$ reference value and I then compare... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9802808753491773,
"lm_q1q2_score": 0.8125928647748364,
"lm_q2_score": 0.8289388125473628,
"openwebmath_perplexity": 288.62371992357845,
"openwebmath_score": 0.7779781818389893,
... |
climate-change, carbon-cycle, land-surface, deforestation
Title: Is it possible that a reduction in vegetation is a cause of global warming? A lot of people seem to believe that the entire cause of global warming is that humans are emitting lots of carbon dioxide. However, according to a source I found online (I accep... | {
"domain": "earthscience.stackexchange",
"id": 785,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "climate-change, carbon-cycle, land-surface, deforestation",
"url": null
} |
general-relativity, differential-geometry, geodesics
In more familiar notation, we have
$$\frac{D^2 n^a}{D\tau^2}=R^a_{\;bcd}u^b n^c u^d$$
So why even bother calling this equation a Jacobi equation? Perhaps there is some general result of Jacobi fields that we wish to apply to GR? This is indeed the case. | {
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"tags": "general-relativity, differential-geometry, geodesics",
"url": null
} |
planes), but I was wondering if they can intersect at one point. In four dimensions or higher, yes. I would not confront your teacher but would recheck the question and if it asks about two planes intersecting I would ask for an explanation, because you don't get it. For example, the xy-plane and the zw-plane intersect... | {
"domain": "com.br",
"id": null,
"lm_label": "1. Yes\n2. Yes\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9740426420486941,
"lm_q1q2_score": 0.8373491525712106,
"lm_q2_score": 0.8596637523076224,
"openwebmath_perplexity": 656.6382688484786,
"openwebmath_score": 0.2999741733074188,
"tags": nul... |
java, android
A side suggestion: I assume that result.parse() doesn't need to be run on the UI-thread, so you can change your class to extend AsyncTask<Void, Void, Map<String, String>> and make the conversion to map in doInBackground (or return null if u.getBt() returns null). Also, you don't need to create a new empt... | {
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"tags": "java, android",
"url": null
} |
Value. P = Principal Dollars Invested. r = Annual Interest Rate. t = Term of Investment (in Years) Example: A woman deposits $5,000 into a savings account with continuously compounded interest at an annual rate of 4.5%. Example of FV with Continuous Compounding Formula. An example of the future value with continuous co... | {
"domain": "bigdrop.shop",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9808759632491111,
"lm_q1q2_score": 0.8152482417684261,
"lm_q2_score": 0.8311430520409023,
"openwebmath_perplexity": 1108.3009002132246,
"openwebmath_score": 0.7155221104621887,
"tags": ... |
-
See also mathoverflow.net/questions/66377/… . – Qiaochu Yuan Jul 10 '11 at 18:52
Maybe use the notion of "elementary function". There are elementary functions $A,B$ such that both $\int A$ and $\int B$ are elementary, but $\int(AB)$ is not elementary. So there can be no simple "product rule" for integration, since a... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.977022632097108,
"lm_q1q2_score": 0.8399109332160738,
"lm_q2_score": 0.8596637433190939,
"openwebmath_perplexity": 191.5125882013445,
"openwebmath_score": 0.9527915716171265,
"tags... |
electromagnetism, electricity, electric-circuits
The Earth / Mars radiated field will couple back into the transmission lines, leading to waves on the lines not modeled by the ladder circuit. Again, the general numerical procedure would be needed;
In this case, the ladder circuit and TEM waves only model the steady st... | {
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"tags": "electromagnetism, electricity, electric-circuits",
"url": null
} |
c#, regex, state-machine, lexical-analysis
These are the tree attributes:
public delegate (bool Success, string Token, int Length) MatchDelegate(string value, int offset);
public abstract class MatcherAttribute : Attribute
{
public abstract (bool Success, string Token, int Length) Match(string value, int offset);... | {
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"tags": "c#, regex, state-machine, lexical-analysis",
"url": null
} |
imu, navigation, robot-localization
Fix those issues and post your messages and I can help more.
EDIT after update:
Two things:
Looking at your rviz output, it seems as though one of your orientation data sources is producing headings (or heading velocities) that are the wrong sign. As per this page on the wiki, it's... | {
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"tags": "imu, navigation, robot-localization",
"url": null
} |
Register
# 15.1. Skip Lists¶
## 15.1.1. Skip Lists¶
This module presents a probabilistic search structure called the skip list. Like the BST, skip lists are designed to overcome a basic limitation of array-based and linked lists: Either search or update operations require linear time. The skip list is an example of ... | {
"domain": "vt.edu",
"id": null,
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9609517028006208,
"lm_q1q2_score": 0.8314385521169291,
"lm_q2_score": 0.8652240791017535,
"openwebmath_perplexity": 2683.6814120507747,
"openwebmath_score": 0.21858777105808258,
"tags": null,... |
python, mongodb
"ModelName": "New Test Model",
"ModelScenarios": [
{
"ScenarioName": "Baseline Scenario",
"PortfolioModelId": "557a882e5dddb71b9c51cf79",
"_id": "557a882e5dddb71b9c51cf7b",
... | {
"domain": "codereview.stackexchange",
"id": 15123,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, mongodb",
"url": null
} |
quantum-mechanics, operators, measurement-problem, observables
Then I get confused by the world ''average'' in ''average value $\langle A\rangle$''. Is this the average value of the physical quantity $A$ in all its the states?
And finally, are we assuming here that my system has only one system described by $\psi$? F... | {
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"id": 35280,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-mechanics, operators, measurement-problem, observables",
"url": null
} |
microcontroller, c
Title: Fixed point arithmetic on microcontrollers Often we use microcontrollers to do things in our robots, but need to make some calculations in decimal. Using floating point variables is very slow, because a software floating point library is automatically included (unless you have a high-end micr... | {
"domain": "robotics.stackexchange",
"id": 22,
"lm_label": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "microcontroller, c",
"url": null
} |
php, mysql, json, pdo, join
// init our results array
$posts = array ();
// get the first post (plus it's JOINed photo)
$row = $st->fetch (PDO::FETCH_OBJ);
// if there's more left
while (false !== $row) {
// init our post array
$post = array (
'id' => $row->id,
'content' => $row->content,
... | {
"domain": "codereview.stackexchange",
"id": 15674,
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"openwebmath_score": null,
"tags": "php, mysql, json, pdo, join",
"url": null
} |
It's very easy to understand and you don't need to be a 10X developer to do so. This method is especially powerful when we encounter recurrences that are non-trivial and unreadable via the master theorem . Recursion tree method for solving recurrences examples ile ilikili ileri arayn ya da 21 milyondan fazla i ieriiyle... | {
"domain": "medetorax.com",
"id": null,
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9744347853343058,
"lm_q1q2_score": 0.8358390757096572,
"lm_q2_score": 0.8577681013541613,
"openwebmath_perplexity": 687.324414298076,
"openwebmath_score": 0.709050178527832,
"tags": nu... |
Due 10/13
# Card shuffling #2 (A)
## Performing k rounds of shuffling
In HW07, your program gets a deck of cards and shuffle this deck once. The program prints the possible orders (with repetitions) after one round of shuffling. You may have noticed that shuffling only once does not produce all possible orderings of... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9773708006261043,
"lm_q1q2_score": 0.8058050109606479,
"lm_q2_score": 0.8244619242200082,
"openwebmath_perplexity": 1280.7714097723047,
"openwebmath_score": 0.3168856203556061,
"tags": nu... |
MAT 142 3.6 Conditional Probability and Intersections
# MAT 142 3.6 Conditional Probability and Intersections
398.7k points
1. The Por Mano Tile Company imports handmade tiles from Mexico. Saltillo tiles makes up 67% of their imports and the rest are talavera tiles. Based on past experience, they expect 3.7% of the S... | {
"domain": "lil-help.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9811668723123673,
"lm_q1q2_score": 0.8489292086563744,
"lm_q2_score": 0.865224084314688,
"openwebmath_perplexity": 6810.577817946176,
"openwebmath_score": 0.46573561429977417,
"tags": n... |
homework-and-exercises, newtonian-mechanics, projectile, drag, rocket-science
$$
m\frac{d^2r}{dt^2} = \frac{dm}{dt} v_e - \frac{GM_{\oplus}m}{r^2} - \frac{1}{2}C_D\rho A\left(\frac{dr}{dt}\right)^2 \tag{1}
$$
This is a non-linear differential equation, which I believe does not have an analytical solution, but this sti... | {
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"tags": "homework-and-exercises, newtonian-mechanics, projectile, drag, rocket-science",
... |
$A\left(y\right)=\dfrac{3\left(4-y\right)}{5}\dfrac{5}{4}y$
$A\left(y\right)=\dfrac{15y\left(4-y\right)}{20}$
$A\left(y\right)=\dfrac{3y\left(4-y\right)}{4}$
$A\left(y\right)=\dfrac{12y-3y^{2}}{4}$
$A\left(y\right)=3y-\dfrac{3}{4}y^{2}$
Differentiating this expression and setting $A'\left(y\right)=0$ gives $0=3-\d... | {
"domain": "physicsforums.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9886682454669814,
"lm_q1q2_score": 0.8771510046176376,
"lm_q2_score": 0.8872045892435128,
"openwebmath_perplexity": 314.10866079218124,
"openwebmath_score": 0.6997645497322083,
"ta... |
organic-chemistry, notation
Title: What is the meaning of n-Pr and i-Pr? Apologies in advance, I have a background in physics, so this question might seem awfully simple.
Anyway, I am interested in the chiral spin selectivity effect in organic molecules, and have read a paper in which they synthesize helicene molecule... | {
"domain": "chemistry.stackexchange",
"id": 7975,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "organic-chemistry, notation",
"url": null
} |
planet, solar-system, natural-satellites, planetary-formation, proto-planetary-disk
It shows the velocity of gas molecules in relation to temperature of the gas. For larger temperatures gas molecules move faster. In a planet with low mass, the escape velocity is lower than one with a larger mass. Thus a planet closer ... | {
"domain": "astronomy.stackexchange",
"id": 3801,
"lm_label": null,
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"openwebmath_score": null,
"tags": "planet, solar-system, natural-satellites, planetary-formation, proto-planetary-di... |
haskell, networking, logging, curl, ip-address
Title: Dynamic IP-address logging Inspired by Don Stewart's article on Scripting with Haskell I tried a rewrite of a shell-script I did the other day. I was really astonished how easily it worked but as a whole it is about double the size of my shell script and some thing... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "haskell, networking, logging, curl, ip-address",
"url": null
} |
qiskit, quantum-state, simulation, density-matrix
matrix simulation? Trajectory - the simulator draws in random (probability depends on the quantum state and noise) one of the Kraus operators, applies it, and normalizes the state. For a large number of shots, if you construct the density matrix from all the resulting ... | {
"domain": "quantumcomputing.stackexchange",
"id": 4150,
"lm_label": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "qiskit, quantum-state, simulation, density-matrix",
"url": null
} |
experimental-physics, laser
Title: Interference or something beyond? I have an experiment with He-Ne laser in my practical syllabus. In curiosity I took a photo of the incoming radiation directly from the laser with my mobile camera. Some strange pattern is observed. The photographs are attached below. Is this just a... | {
"domain": "physics.stackexchange",
"id": 30650,
"lm_label": null,
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"lm_q1_score": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "experimental-physics, laser",
"url": null
} |
physical-chemistry, atomic-structure
Title: Why isoelectronic species give similar spectral lines? In my perspective those species should give similar spectra those which have same energy of different energy levels as the transition would yeild same energy photon
But still the answer to this question is always the iso... | {
"domain": "chemistry.stackexchange",
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"tags": "physical-chemistry, atomic-structure",
"url": null
} |
# Find stationary points of a two variable function involving
Woolyabyss
## Homework Statement
Find all stationary points of the function
G(x, y) = (x^3)*e^(−x^2−y^2)
fx=0 and fy=0
## The Attempt at a Solution
Gx = 3x^2*e^(-x^2-y^2) +x^3(-2x)e^(-x^2-y^2) = e^(-x^2-y^2)(3x^2-2x^4)
Gx = 0 implies 3x^2-2x^4=0
x^2... | {
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"openwebmath_score": 0.8049069046974182,
... |
performance, c, hash-map, c99
| | (38) following ‘true’ branch (when ‘current_entry’ is non-NULL)...
| 140 | {
| 141 | if(memcmp(current_entry->key, key, key_size) == 0) return current_entry;
| | ~~~~~~~~~~... | {
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"tags": "performance, c, hash-map, c99",
"url": null
} |
performance, image, swift
uint8x8_t delta8_lt_ft_r = vclt_u8(delta8_r, fthrsh8);
uint8x8_t delta8_lt_ft_g = vclt_u8(delta8_g, fthrsh8);
uint8x8_t delta8_lt_ft_b = vclt_u8(delta8_b, fthrsh8);
uint8x8_t keep_color8 = vand_u8(delta8_lt_ft_r, vand_u8(delta8_lt_ft_g, delta8_lt_ft_b));
uint8... | {
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"openwebmath_score": null,
"tags": "performance, image, swift",
"url": null
} |
java, object-oriented, sorting, swing, data-visualization
int temp = nums[i];
nums[i] = nums[j];
nums[j] = temp;
SortingAlgorithm.setCurrentBar(j);
SortingAlgorithm.sleepFor(delay);
}
}
int temp = nums[i + 1];
nums[i ... | {
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"tags": "java, object-oriented, sorting, swing, data-visualization",
"url": null
} |
electromagnetism, electric-current, voltage, electromagnetic-induction
$$
\vec F = q\left(\vec v\times\vec B + \vec E \right),
$$
implies that a charge must be moving to experience a force from a static magnetic field. However a changing magnetic field produces a nonzero $\vec E$, and can therefore exert force on sta... | {
"domain": "physics.stackexchange",
"id": 98296,
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"openwebmath_score": null,
"tags": "electromagnetism, electric-current, voltage, electromagnetic-induction",
"url": ... |
homework-and-exercises, fluid-dynamics, lagrangian-formalism
Initially the mass element at $a$ had mass ( I use $\delta$ to make clear that we really should consider finite differences and then perform a limit at the end)
$$m = \rho(a,0) \delta a$$
now, we follow its motion and after some time t we should find that th... | {
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"tags": "homework-and-exercises, fluid-dynamics, lagrangian-formalism",
"url": null
} |
electromagnetism, lagrangian-formalism, gauge-theory, supersymmetry, fermions
In an EM background, the Hamiltonian $H$ and supercharge $Q$ change to
$$ \begin{align}
H~:=~&\frac{1}{2}((p-qA)^2+m^2)+\frac{iq}{2}F_{\mu\nu}\psi^{\mu}\psi^{\nu}, \cr
Q~:=~&(p_{\mu}-qA_{\mu})\psi^{\mu}+m\psi^5 ,
\end{align} $$
cf. eq. (12... | {
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"openwebmath_score": null,
"tags": "electromagnetism, lagrangian-formalism, gauge-theory, supersymmetry, fermions",
... |
c++, tree, reinventing-the-wheel
template <typename T, typename Less, typename Eq>
std::pair<std::shared_ptr<Node<T, Less, Eq>>, int>
Node<T, Less, Eq>::erase_all(const T& t, Less less, Eq eq) {
int num_removed = 0;
if (left && !less(data, t)) {
auto result = left->erase_all(t, less, eq);
left ... | {
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"tags": "c++, tree, reinventing-the-wheel",
"url": null
} |
get your feet wet), you can think of an antisymmetric relationof a set as one with no ordered pair and its reverse in the relation. reflexive relation:symmetric relation, transitive relation REFLEXIVE RELATION:IRREFLEXIVE RELATION, ANTISYMMETRIC RELATION RELATIONS AND FUNCTIONS:FUNCTIONS AND NONFUNCTIONS R is reflexive... | {
"domain": "ubezwlasnowolnienie.pl",
"id": null,
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"lm_q1_score": 0.9861513897844354,
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"lm_q2_score": 0.8705972684083609,
"openwebmath_perplexity": 737.7476827893647,
"openwebmath_score": 0.7028664350509644,
... |
c++, algorithm, quick-sort
C++
The only line of code in this that differentiates it from C is the print statement, which I assume is just for debugging. If you #include <utility> you get some very useful functions. (You'll need to #include <algorithm> if you're using C++ that pre-dates C++11.) For example, std::swap()... | {
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"tags": "c++, algorithm, quick-sort",
"url": null
} |
of the radical. Simplify an Algebraic Term Involving Exponents and/or Powers Algebraic expression frequently involve terms that have exponents. Approximate Roots with a Calculator 5. Algebra1help. Menu Algebra 1 / Rational expressions / Add and subtract rational expressions If the two rational expressions that you want... | {
"domain": "miguelsal.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9881308796527184,
"lm_q1q2_score": 0.8168994607319077,
"lm_q2_score": 0.8267118026095991,
"openwebmath_perplexity": 1309.069800969074,
"openwebmath_score": 0.7000554203987122,
"tags... |
python, performance, array, datetime, numpy
count = -1
for i,boolean in enumerate(clock_ticks_coarse):
if boolean == 1:
count +=1
clock_ticks_coarse[i] = count
else:
clock_ticks_coarse[i] = boolean+count
fine_time_array = clock_ticks_fine*fine_div
coarse_time_array = clock_ticks_coarse... | {
"domain": "codereview.stackexchange",
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, performance, array, datetime, numpy",
"url": null
} |
python, console, validation, user-interface
does not need escaping since the string is double-quoted.
This branching code:
if status:
print(f"{Fore.GREEN}{Style.BRIGHT}{message}{Style.RESET_ALL}\n")
else:
print(f"{Fore.RED}{Style.BRIGHT}{message}{Style.RESET_ALL}\n")
should instead conditional... | {
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"tags": "python, console, validation, user-interface",
"url": null
} |
c, unit-testing, shell, sh, cmake
#
# Build The Unit Tests
#
if [ -d "${UNITTESTDIRECTORY}" ] ; then
if [ -f "${FULLSPECSHELLFILE}" ] ; then
echo "Building $UNITTESTDIRECTORY";
cd "${UNITTESTDIRECTORY}" || exit
./"${SHELLFILE}" > "${LOGFILE}" 2>&1
retVal=$?
if [ $retVal -ne 0 ]... | {
"domain": "codereview.stackexchange",
"id": 40436,
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"lm_name": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c, unit-testing, shell, sh, cmake",
"url": null
} |
python, beginner, collatz-sequence
def main(args):
# Get user arguments.
opts = parse_args(args)
# Make computations.
sequences = [list(collatz(val)) for val in opts.initial_values]
# Report to user. Enhance as needed.
for seq in sequences:
print(seq)
def parse_args(args):
# You ... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, beginner, collatz-sequence",
"url": null
} |
imu, navigation, gps, robot-localization
I'm very suspicious of your GPS data. The fact that you are getting ekf_localization_node positions into the tens or hundreds of meters indicates that your GPS data is almost certainly not being fed into the filter. Can you post the value of /odometry/gps? Global position measu... | {
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"tags": "imu, navigation, gps, robot-localization",
"url": null
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• @user6607: Generally you can use power laws for processes where the logarithms of the variables show a linear dependency $\ln y = a \ln x,\;$ or when the relative changes are proportional $$\frac{\Delta y}{y} = a \frac{\Delta x}{x}\approx\frac{dy}{y} = a \frac{dx}{x} \Longrightarrow y(x) = b x^a$$ – gammatester Sep 1... | {
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"lm_q1_score": 0.9770226314280634,
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"lm_q2_score": 0.8289388167733099,
"openwebmath_perplexity": 502.13213147340883,
"openwebmath_score": 0.8481196761131287,
"ta... |
# Two diagonals of a regular nonagon (a $9$-sided polygon) are chosen. What is the probability that their intersection lies inside the nonagon?
Two diagonals of a regular nonagon (a $9$-sided polygon) are chosen. What is the probability that their intersection lies inside the nonagon?
This is similar to a previous pr... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9674102552339746,
"lm_q1q2_score": 0.8143907681091536,
"lm_q2_score": 0.8418256512199033,
"openwebmath_perplexity": 260.6889899825877,
"openwebmath_score": 0.721107542514801,
"tags... |
organic-chemistry, acid-base
Title: Determining Acidity in organic compounds Among the following compounds,the strongest acid is:
(a) $\ce{C2H2}$
(b) $\ce{C6H6}$
(c) $\ce{C2H6}$
(d) $\ce{CH3OH}$
My doubt is how do we see acidity in such cases.....arhenius or lewis definition or we just see acidic hydrogen in such case... | {
"domain": "chemistry.stackexchange",
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"tags": "organic-chemistry, acid-base",
"url": null
} |
classical-mechanics, lagrangian-formalism, mathematical-physics, hamiltonian-formalism, hamiltonian
i.e. $H$ is genuinely a function of $q,p,t$, whereas the differential of $\bar{L}$ still requires knowing $\partial\dot{q}/\partial p$, even it is parametrized by $p$.
It is the same Legendre transformation (although wi... | {
"domain": "physics.stackexchange",
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"openwebmath_score": null,
"tags": "classical-mechanics, lagrangian-formalism, mathematical-physics, hamiltonian-forma... |
thermal-radiation, signal-processing, noise
Title: What would a blackbody sound like? If a blackbody has a temperature such that its peak frequency was well within our audible range, for example $1\ \mathrm{kHz}$, what would that sound like if we used Planck's law to plot its spectral curve in the frequency domain and... | {
"domain": "physics.stackexchange",
"id": 26096,
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"openwebmath_score": null,
"tags": "thermal-radiation, signal-processing, noise",
"url": null
} |
javascript, jquery, jquery-ui
I imagine there are some optimisations here - any thoughts? When working with prices, then in my opinion it's usually a good idea to avoid floating point numbers. Binary rounding errors can easily strike unexpectedly any time.
Instead I'd suggest to work with integers (thus pennies) inte... | {
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"tags": "javascript, jquery, jquery-ui",
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ros, openni-launch, openni.launch
core service [/rosout] found
process[camera/camera_nodelet_manager-1]: started with pid [2552]
process[camera/driver-2]: started with pid [2553]
process[camera/rgb_debayer-3]: started with pid [2554]
process[camera/rgb_rectify_mono-4]: started with pid [2555]
process[camera/rgb_rectif... | {
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"id": 27259,
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"openwebmath_score": null,
"tags": "ros, openni-launch, openni.launch",
"url": null
} |
correlation-functions
So, what is the correct definition of the time-correlation function between two variables? Depending on the context, the angle brackets could mean an ensemble average or a time average. The two are equivalent if the ensemble is an equilibrium ensemble, and if the system is ergodic. This would mea... | {
"domain": "physics.stackexchange",
"id": 55200,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "correlation-functions",
"url": null
} |
newtonian-mechanics, water, fluid-statics, free-body-diagram, density
Title: When putting a floating object in water, why the displacement of mass of water is not equal to only the part of the object inside the water? In this question Will a bathtub full of water weigh more if I add something that floats in the water?... | {
"domain": "physics.stackexchange",
"id": 78150,
"lm_label": null,
"lm_name": null,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "newtonian-mechanics, water, fluid-statics, free-body-diagram, density",
"url": n... |
audio
Title: Audio output quality When a digital device (PC, portable media player, etc.) plays a digital audio file (ogg, mp3, flac, etc.) the audio signal output is always the same, regardless of the device type/brand, am I right? Thus the sound quality should not differ. For instance, I have an iPod that plays an m... | {
"domain": "dsp.stackexchange",
"id": 34,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "audio",
"url": null
} |
general-relativity, differential-geometry, coordinate-systems, covariance
Any help will be greatly appreciated. The middle term doesn't necessarily have to make sense: it is just a part of the way the Christoffel symbols transform, and those do not transform as a tensor.
The reason he uses $\frac{\partial}{\partial x^... | {
"domain": "physics.stackexchange",
"id": 91573,
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"lm_name": null,
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"lm_q2_score": null,
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"tags": "general-relativity, differential-geometry, coordinate-systems, covariance",
"url... |
newtonian-mechanics, waves, harmonic-oscillator, oscillators, viscosity
It seems the $Q$ of each harmonic must be proportional to the total strain and rate of total strain change at each time point, right?
I presume there must be some approximation method (whether this way or another way) that could be applied but I d... | {
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"tags": "newtonian-mechanics, waves, harmonic-oscillator, oscillators, viscosity",
"url":... |
# Why is a Linear Equation Called Linear?
#### (New Question of the Week)
From time to time we get a question that is more about words than about math; usually these are about the meaning or origin of mathematical terms. Fortunately, some of us love words as much as we love math. But the question I want to look at he... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
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"lm_q1_score": 0.9845754452025766,
"lm_q1q2_score": 0.8735198622493822,
"lm_q2_score": 0.8872045981907006,
"openwebmath_perplexity": 391.00202638539787,
"openwebmath_score": 0.6129183173179626,
"t... |
ros, rviz
controllers.yaml:
controller_list:
- name: /yumi/egm/jnt_traj_vel_controller
action_ns: joint_trajectory_action
type: FollowJointTrajectory
joints:
- yumi_robl_joint_1
- yumi_robl_joint_2
- yumi_robl_joint_3
- yumi_robl_joint_4
- yumi_robl_joint_5
- yumi_robl... | {
"domain": "robotics.stackexchange",
"id": 37167,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ros, rviz",
"url": null
} |
I therefore tried to find a recursive relation. I found that the general relation is $$a(n) = 2*a(n-1)$$ if n odd and $$2*a(n-1) + 6$$ if n is even.
For n=4, we have 6 such numbers (4-digit numbers, but with the given restrictions). Then if we add one more digit to the right, we remove the rightmost (4th) digit, which... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9895109071934599,
"lm_q1q2_score": 0.8245837721978564,
"lm_q2_score": 0.8333245911726382,
"openwebmath_perplexity": 171.0872731511633,
"openwebmath_score": 0.8659646511077881,
"tag... |
asymptotics, proof-techniques
To show that $6^n \notin O(5^n)$, we need to show that for any $c$ we pick, there's an $n_0$ after which $6^n > c5^n$; in other words, no matter what constant we multiply $5^n$ by, $6^n$ always eventually wins. To do this, we can calculate $n_0$ from $c$. We solve:
$$6^n > c5^n$$
$$\frac{... | {
"domain": "cs.stackexchange",
"id": 3373,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "asymptotics, proof-techniques",
"url": null
} |
human-physiology, respiration, circulatory-system
Title: Is there any evidence of causation for breathing rate to affect blood pressure in a human? I did some research and trials, and with 5 trials for a normal heart rate and 5 done 45 seconds into breath holding, the results came back showing that my heart rate of 11... | {
"domain": "biology.stackexchange",
"id": 9299,
"lm_label": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "human-physiology, respiration, circulatory-system",
"url": null
} |
reinforcement-learning, rewards, reward-shaping, reward-design, sparse-rewards
Title: Are there any reliable ways of modifying the reward function to make the rewards less sparse? If I am training an agent to try and navigate a maze as fast as possible, a simple reward would be something like
\begin{align}
R(\text{te... | {
"domain": "ai.stackexchange",
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"openwebmath_score": null,
"tags": "reinforcement-learning, rewards, reward-shaping, reward-design, sparse-rewards",
"url"... |
javascript
// Keys will either be 'Key_' for outermost level
Example of redundant code. The array keys, the iteration counter i, and the extra array indexing into keys are all redundant because there is a shorter way to write the same
let keys = Object.keys(dict) //give me an array of keys
for (let i=0; i< keys.len... | {
"domain": "codereview.stackexchange",
"id": 30863,
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"tags": "javascript",
"url": null
} |
formal-languages, closure-properties
Title: Kleene positive closure - help in proofing this claim I just started a course called 'Automata and Formal Languages'.
I'm having difficulty in proofing\disproofing this equality.
$ (L_{1} \circ L_{2})^{+} = L_{1}^{+} \circ L_{2}^{+}
$
Where:
$ L_{1} $, $L_{2}$ are Languag... | {
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"openwebmath_score": null,
"tags": "formal-languages, closure-properties",
"url": null
} |
newtonian-mechanics, electromagnetism, forces, energy, work
Thanks in advance.
Work is the transfer of energy that occurs to/from an object when a
force acts on it to cause a displacement. | {
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"tags": "newtonian-mechanics, electromagnetism, forces, energy, work",
"url": null
} |
java, spring, hibernate, crud
response.sendRedirect("http://localhost:8080/crud");
return "home";
}
return "addCat";
}
@RequestMapping("addDog")
public String addAnimal(HttpServletRequest request,HttpServletResponse response, @ModelAttribute("dogDto") @Valid DogDTO dogDto, BindingResult result) throws ... | {
"domain": "codereview.stackexchange",
"id": 19900,
"lm_label": null,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, spring, hibernate, crud",
"url": null
} |
ros, ekf, ekf-localization-node, ros-kinetic
Comment by crazymumu on 2020-05-31:
for the 10 degree offset, I think your are right, the vehicle is metal and is huge. We didn't calibrate the mag in 3D space and just drive the vehicle A big 8 for mag calibration. And the heading is mainly from mag, so that's the error we... | {
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"tags": "ros, ekf, ekf-localization-node, ros-kinetic",
"url": null
} |
c#
Title: Simplify the code in C# I wonder how could I simplify the code below? Please note that it's not allowed to use instance variables here for some reason.
private bool ValidateQueryString(NameValueCollection queryString, out byte[] errorMessages)
{
var errorsList = new List<string>()... | {
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "c#",
"url": null
} |
thermodynamics
Title: Heat Capacity of an ideal gas The question is:
A monoatomic gas undergoes a process $PV^3=k$ where k is a constant. Find the heat capacity of the gas.
Problem:
I know how to calculate the heat capacity at constant pressure ($C_p$) and ($C_v$) of a gas but this problem does not ask any of them.
I ... | {
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"id": 52292,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "thermodynamics",
"url": null
} |
javascript, performance, algorithm, programming-challenge, regex
function nextChar(x){return String.fromCharCode(x.charCodeAt(0)+1);}
var requirements = [
{name: "straight3", nextMatch: function nextMatch(str){
var prefix = str;
while(prefix.length > 2){
if(prefix === straighten(prefix)) return str;
... | {
"domain": "codereview.stackexchange",
"id": 17324,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "javascript, performance, algorithm, programming-challenge, regex",
"url": nul... |
java, console, enum
Usage:
List<Action> actions = new Action<>();
actions.add(new OpenAction());
actions.add(new ExitAction());
for (Action action: actions) {
if (!action.getKeyCode().eqauls(pressedKey)) {
continue;
}
action.doAction();
return;
}
// invalid action
Note the MenuExitException t... | {
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"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, console, enum",
"url": null
} |
general-relativity, differential-geometry, metric-tensor, tensor-calculus
Title: Christoffel's Symbol's relation to the Metric Tensor In chapter 9.2 of "Tensors, Relativity and Cosmology", the contracted Christoffel symbol of the second kind as a function of the metric tensor was defined as: $$\Gamma_{nm}^m=\frac{1}{2... | {
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"id": 57503,
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"lm_name": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "general-relativity, differential-geometry, metric-tensor, tensor-calculus",
"url... |
quantum-mechanics, homework-and-exercises, statistical-mechanics, identical-particles
By contrast, the tensor product representation tells you which particle is in which state, for example $|u,u,g>$ means that the first and the second particle are in the uppermost state while the third particle is in the ground state.... | {
"domain": "physics.stackexchange",
"id": 26740,
"lm_label": null,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-mechanics, homework-and-exercises, statistical-mechanics, identical-partic... |
general-relativity, black-holes, quantum-gravity, hawking-radiation, information
All of this scenario can be treated with special relativity, and it teaches good lessons to prepare us for general relativity. The main lesson here is that the process of emission and subsequent absorption of radiation is not absolute but... | {
"domain": "physics.stackexchange",
"id": 55014,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "general-relativity, black-holes, quantum-gravity, hawking-radiation, information",... |
quantum-state
Quantum secret sharing with qudit graph states
Absolutely Maximally Entangled Qudit Graph States
whereas some do not specify any such restriction, such as
Greenberger-Horne-Zeilinger Paradoxes from Qudit Graph States
Quantum-error-correcting codes using qudit graph states | {
"domain": "quantumcomputing.stackexchange",
"id": 248,
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"lm_name": null,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "quantum-state",
"url": null
} |
java, beginner, quiz
System.out.println("Is this your final answer? (yes or no)");
finalanswer=scanner.nextLine();
} while(!finalanswer.equals(x));
if (guess1.equals(a)) {
System.out.println("You got it right!!! Congrats " + name+ " !! \n\n");
}
else {
System.out.print... | {
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"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
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"openwebmath_score": null,
"tags": "java, beginner, quiz",
"url": null
} |
java, algorithm, array, random, divide-and-conquer
Suggestions will be much appreciated :)
EDIT
It seems I did not express my thoughts properly.
I do not want repetitions during the random iteration. The idea is basically to cover all the array indices once, but do it randomly. The example linked above does this. It u... | {
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"tags": "java, algorithm, array, random, divide-and-conquer",
"url": null
} |
Continuity of $x^y$ is irrelevant. While there are theorems that state that if $x_n \to x$ and $y_n \to y,$ then $(x_n + y_n) \to x+y$ and $(x_n)(y_n) \to xy$, there is no corresponding theorem that states that $(x_n)^(y_n) \to x^y$. I don't know why people keep beating this straw man to conclude that $0^0$ can't or sh... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9603611631680358,
"lm_q1q2_score": 0.850526081031177,
"lm_q2_score": 0.8856314828740729,
"openwebmath_perplexity": 295.7275950296971,
"openwebmath_score": 0.8990147709846497,
"tags... |
control, robotic-arm, kalman-filter, matlab, noise
B = [0; Ap*10/m1; 0 ; 0; 0; 0]; % Input matrix
C = [0 1 0 0 0 0]; % Output matrix
I = [0; 1; 0 ; 0; 0; 0]; % Disturbance matrix.
% LQR
Q = diag([0 0 0 40 0 0]);
R = 0.1;
L = lqr(A, B, Q, R); % The control law - LQR gain matrix
% LQE
Vd = diag([1 1 1 1 1 1]);
Vn = 1... | {
"domain": "robotics.stackexchange",
"id": 1426,
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"lm_name": null,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "control, robotic-arm, kalman-filter, matlab, noise",
"url": null
} |
gazebo, simulation, gazebo-7
if (!uriPair.second || uriPair.first.empty())
{
errors.push_back({ErrorCode::ELEMENT_INVALID,
"A <script> element is missing a child <uri> element, or the "
"<uri> element is empty."});
}
this->dataPtr->scriptUri = resolveURI(uriPair.first, _config, e... | {
"domain": "robotics.stackexchange",
"id": 38639,
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"lm_name": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "gazebo, simulation, gazebo-7",
"url": null
} |
lagrangian-formalism, rotational-dynamics, variational-principle, action, rigid-body-dynamics
+ M\cdot \delta\alpha
~\stackrel{(9)}{=}~ L^{\alpha}\cdot \left(\frac{d}{dt}\delta\alpha
+ (\omega^{\alpha}\times\delta\alpha)\right)
+ M\cdot \delta\alpha ,$$
which (after integration by parts and appropriate boundary con... | {
"domain": "physics.stackexchange",
"id": 9238,
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"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "lagrangian-formalism, rotational-dynamics, variational-principle, action, rigid-bod... |
supernova, explosion
Title: Speed of blast from supernova How fast does the blast front of a supernova expand at? Is it close to the speed of light or is it less than a quarter of the speed of light? The speed of the blast front depends on the initial energy release and the density of the medium into which it is expan... | {
"domain": "astronomy.stackexchange",
"id": 991,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "supernova, explosion",
"url": null
} |
c#, xml, web-services
_webService = new WebService
{
ws.AuthenticationHeaderValue = header;
}
}
public IEnumerable<AccountResult> SearchByEmail(string email)
{
return ConvertXmlToResultsList(_webService... | {
"domain": "codereview.stackexchange",
"id": 2336,
"lm_label": null,
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"lm_q1_score": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c#, xml, web-services",
"url": null
} |
java, object-oriented
public void setPlayers(Player one, Player two) {
playerOne = one;
playerTwo = two;
mCurrentPlayer = playerOne;
}
public void play() {
int[] move = mCurrentPlayer.makeMove();
checkWinner(move);
moves++;
if (isGameEnded) {
... | {
"domain": "codereview.stackexchange",
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"tags": "java, object-oriented",
"url": null
} |
algorithms, turing-machines
edit--
What my question really is. Let's say we have the computing power for a perfect algorithm that can play optimally. What happens when the opponent plays with the same optimal algorithm? That also will apply in all 2 player games with finite number (very large or not) of moves. Can the... | {
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"openwebmath_score": null,
"tags": "algorithms, turing-machines",
"url": null
} |
the development in the text. This means that problems will not be solved using ideas and theorems presented further on in the book. ### Herstein 3.7.1: Let $R$ be commutative and unital. Show that the relation $a\sim b$ if $a$ is an associate of $b$ is an equivalence relation. Let $r,s,t\in R$. 1. $\sim$ is reflexive: ... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9840936082881853,
"lm_q1q2_score": 0.8045698097604136,
"lm_q2_score": 0.8175744695262777,
"openwebmath_perplexity": 77.24729354257474,
"openwebmath_score": 0.9367215633392334,
"tags": ... |
data-structures, strings, hash-tables
A hash table is not necessarily the best structure to represent a mapping from keys to values. Search trees or tries have many advantages. Balanced search trees have guaranteed $O(\lg(n))$ behavior, whereas hash tables are harder to protect against deliberately-crafted key sets (n... | {
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"id": 7162,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "data-structures, strings, hash-tables",
"url": null
} |
the-moon, telescope
Some telescope drives do have a "lunar rate" so that it will track the Moon more accurately. But these approximations do not take into account the fact that the Moon is also moving north or south in declination as it orbits the Earth; the lunar rate only compensates for its west to east motion. (Ma... | {
"domain": "astronomy.stackexchange",
"id": 2361,
"lm_label": null,
"lm_name": null,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "the-moon, telescope",
"url": null
} |
diagonals and angle between them are given. A quadrilateral is a polygon with four sides (or edges) and four vertices or corners. In this, the largest diagonal of a kite bisect the smallest diagonal. Diagonals are the straight lines joining the opposite corners. Maximum Quadrilateral Area Here is the question: Given a ... | {
"domain": "cykelfabriken.se",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9621075755433747,
"lm_q1q2_score": 0.8017479100188483,
"lm_q2_score": 0.8333245994514084,
"openwebmath_perplexity": 895.497638350082,
"openwebmath_score": 0.6410919427871704,
"tags"... |
ros-kinetic, transform
static_transform_publisher x y z yaw pitch roll frame_id child_frame_id period_in_ms
Publish a static coordinate transform to tf using an x/y/z offset in meters and yaw/pitch/roll in radians. (yaw is rotation about Z, pitch is rotation about Y, and roll is rotation about X). The period, in mill... | {
"domain": "robotics.stackexchange",
"id": 34584,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ros-kinetic, transform",
"url": null
} |
quantum-field-theory, hamiltonian-formalism, quantum-anomalies
A more down-to-earth approach is to introduce some regulator to your operator $\hat j$, perform all your manipulations using well-defined objects only, and take the physical limit at the very end. In the case above, one lets
$$
\hat j^\mu(x):=\lim_{y\to x}... | {
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"openwebmath_score": null,
"tags": "quantum-field-theory, hamiltonian-formalism, quantum-anomalies",
"url": null
} |
ros, ros-fuerte
/sh_lfj0_mixed_position_velocity_controller/command [std_msgs/Float64] 1 subscriber
/gazebo/set_link_state [gazebo_msgs/LinkState] 1 subscriber
/sh_lfj3_mixed_position_velocity_controller/command [std_msgs/Float64] 1 subscriber
/set_hfov [std_msgs/Float64] 1 subscriber
/tf [tf/tfMessage] 1 subscriber
/... | {
"domain": "robotics.stackexchange",
"id": 13666,
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"lm_name": null,
"lm_q1_score": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ros, ros-fuerte",
"url": null
} |
newtonian-mechanics, friction, reference-frames, centrifugal-force, centripetal-force
This means centrifugal force is a fictitious force (or pseudo force). It isn't actually there. Any body travelling in a straight tries to resist its direction from being changed (inertia). When a body moves in a circle, it tries to g... | {
"domain": "physics.stackexchange",
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"tags": "newtonian-mechanics, friction, reference-frames, centrifugal-force, centripetal-fo... |
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