text stringlengths 1 1.11k | source dict |
|---|---|
-
Related and possibly dupe: math.stackexchange.com/questions/52745/… – Aryabhata Apr 7 '12 at 16:48
@Aryabhata I don't think these problems are related (unless I am missing something). This problem is about the maximum number of points that can be equidistant from each point. Whereas that link is about another proble... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9901401461512076,
"lm_q1q2_score": 0.8095133047462446,
"lm_q2_score": 0.8175744695262777,
"openwebmath_perplexity": 178.9608500624473,
"openwebmath_score": 0.8673343062400818,
"tag... |
kinematics, velocity, differentiation, calculus
The chosen interval around the target value $t=2$ are arbitrary. Hence, I could have chosen to use different points, e.g.
$(t_1, s_1) = (1.8, 1.8^3)$ and
$(t_2, s_2) = (2.2, 2.2^3)$, which yields $\Delta s/\Delta t = 12.04$, or I could have chosen a non-symmetric interva... | {
"domain": "physics.stackexchange",
"id": 69614,
"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": "kinematics, velocity, differentiation, calculus",
"url": null
} |
python, array
I think users would expect the same behaviour for your class, which you can implement with the __bool__ (Python 3.x) or __nonzero__ (Python 2.x) methods. Just return not is_empty()
Iterator
The biggest flaw I see in the code is your implementation of iteration. You are keeping the index in the array obje... | {
"domain": "codereview.stackexchange",
"id": 35438,
"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": "python, array",
"url": null
} |
pcl, ros-kinetic, pointcloud
http://docs.pointclouds.org/trunk/structpcl_1_1_point_x_y_z.html
http://docs.pointclouds.org/trunk/classpcl_1_1_point_cloud.html
https://wiki.ros.org/pcl/Overview (this one is essential)
Originally posted by Dyson sphere with karma: 46 on 2019-03-11
This answer was ACCEPTED on the origina... | {
"domain": "robotics.stackexchange",
"id": 32597,
"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": "pcl, ros-kinetic, pointcloud",
"url": null
} |
discrete-signals, fourier, fourier-series
The DFT does not care about the sampling rate. The sampling rate is used to convert frequencies in the DFT of cycles per frame to cycles per the underlying dimension's unit.
$2\pi$ has units of $\frac{radians}{cycle}$. The $kth$ bin in a DFT represents a frequency of $k$ $\f... | {
"domain": "dsp.stackexchange",
"id": 8786,
"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": "discrete-signals, fourier, fourier-series",
"url": null
} |
pressure, valves
Title: Is there a pressure check valve that doesn't bleed the excess pressure? My issue is that downstream, I have a boiler making pressure at 10.54 bar and upstream I have a system that must NOT be heated at any point beyond 130 °C. My plan is to make sure the system pressure upstream stays 3 bar at ... | {
"domain": "engineering.stackexchange",
"id": 4878,
"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": "pressure, valves",
"url": null
} |
performance, c, ai, portability, khronos
tmpErr = ps_start_utt(ps);
if (tmpErr != 0)
{
KGRONOS_LOGGER("ps_start_utt failed with status: %d.",
tmpErr);
retVal = KHRONOS_ERR_API;
goto done;
}
/* All the magic succeeded */
/* So, fill the output buffer, or just set... | {
"domain": "codereview.stackexchange",
"id": 19990,
"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": "performance, c, ai, portability, khronos",
"url": null
} |
parsing, linux, c++17
Title: bad GNU libc argp code In helpcovid git commit e27dd3b123c18300665 we have a stupid bug related to Linux GNU glibc argp program argument parsing.
void
hcv_parse_program_arguments(int &argc, char**argv)
{
struct argp_state argstate;
memset (&argstate, 0, sizeof(argstate));
argstate.in... | {
"domain": "codereview.stackexchange",
"id": 37695,
"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": "parsing, linux, c++17",
"url": null
} |
performance, vba, excel, ms-word
Bring the Excel data in as an array (Dim X as Variant : X = .Range(dataRange).Value). You can then close the file early and work directly with the values. In your current code you are switching between the Excel model and the VBA model a few times in that loop, which is eating precious... | {
"domain": "codereview.stackexchange",
"id": 35005,
"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": "performance, vba, excel, ms-word",
"url": null
} |
Suppose that $f:\mathbb R\to\mathbb R$ is continuous and nowhere differentiable. Then $G=\{(x,f(x)):x\in\mathbb R\}\subset \mathbb R^2$ is path connected, and if $a<b$, then the length of any path in $G$ connecting $(a,f(a))$ to $(b,f(b))$ is bounded below by the total variation of $f$ on $[a,b]$, hence is infinite.
E... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9825575157745542,
"lm_q1q2_score": 0.8144800562334095,
"lm_q2_score": 0.8289388083214156,
"openwebmath_perplexity": 144.080486923193,
"openwebmath_score": 0.8751280903816223,
"tags... |
cc.complexity-theory, complexity-classes, boolean-functions
Alas, it is not possible to use rectangle covers to prove meaningful lower bounds on KW relations. The reason is that every KW relations can be covered by $2n$ rectangles. Those rectangles are constructed as follows: for every index $i \in [n]$ and bit $b \in... | {
"domain": "cstheory.stackexchange",
"id": 5186,
"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": "cc.complexity-theory, complexity-classes, boolean-functions",
"url": null
} |
Free Geometry Tutorials, Problems and Interactive Applets, Convert Rectangular to Polar Coordinates - Calculator. 4 The calculator will convert the polar coordinates to rectangular (Cartesian) and vice versa, with steps shown. I am having trouble converting polar form complex numbers into rectangular form by writing a ... | {
"domain": "beautylab.gr",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9688561694652215,
"lm_q1q2_score": 0.8724838332480516,
"lm_q2_score": 0.9005297801113612,
"openwebmath_perplexity": 851.5356286069533,
"openwebmath_score": 0.8774170875549316,
"tags": n... |
electrostatics, electric-fields, charge, gauss-law
Is this field just ignored for some reason since it is a long cylinder? How do you know that it will be negligible in that case? You are assuming that the cylinder is long and that you are measuring the field "somewhere in the middle," where the fields either cancel o... | {
"domain": "physics.stackexchange",
"id": 86663,
"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": "electrostatics, electric-fields, charge, gauss-law",
"url": null
} |
javascript
(I didn't reproduce the (unchanged) HTML part, so it's easier to focus on it)
<script>
var counters = document.getElementsByClassName('box-counter');
for (var i = 0, n = counters.length; i < n; i++) {
var element = counters[i],
XHR = new XMLHttpRequest();
element.innerHTML = 'unknown';
X... | {
"domain": "codereview.stackexchange",
"id": 13433,
"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",
"url": null
} |
java, programming-challenge
//then
FloatingPointNumberComparator.isApproximatelyEqual(first, second);
}
@Test (expected = IllegalArgumentException.class)
public void tooSmallNumberTest(){
//given
double first = 0.9E-151; //big float number
double second = addPermyriad(first... | {
"domain": "codereview.stackexchange",
"id": 42949,
"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": "java, programming-challenge",
"url": null
} |
simulation, roslaunch, ros-kinetic
If you make change (1), you'll probably then get an error saying there is no xacro macro for husky_robot. The custom_description.urdf.xacro file, for some reason unknown to me, tries to use a macro for husky_robot from the husky_description package, even though there doesn't seem to ... | {
"domain": "robotics.stackexchange",
"id": 31270,
"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": "simulation, roslaunch, ros-kinetic",
"url": null
} |
general-relativity, metric-tensor, gravitational-waves, stress-energy-momentum-tensor, linearized-theory
\begin{equation}
\sqrt{G}_N \hat{\mathcal{E}}^{(1)} h_{\mu\nu} + G_N \hat{\mathcal{E}}[h]^{(2)} h_{\mu\nu} + \cdots + G_N^{N/2} \hat{\mathcal{E}}[h]^{(N)} h_{\mu\nu}= 0
\end{equation}
Note that up to this point, we... | {
"domain": "physics.stackexchange",
"id": 78708,
"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": "general-relativity, metric-tensor, gravitational-waves, stress-energy-momentum-ten... |
• The specific details of the syntactic form will depend on the specific formal system chosen, so you can consider the proof sketch in my answer akin to pseudo-code. If you use the rules in my linked post, then "form of a proof by contradiction" in my answer corresponds to a formal proof whose last 3 lines are of the f... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9799765552017674,
"lm_q1q2_score": 0.8461035408992584,
"lm_q2_score": 0.8633916152464016,
"openwebmath_perplexity": 251.62871913055332,
"openwebmath_score": 0.8424243927001953,
"ta... |
fft, sound
Title: Acoustic measure of a specific room I would like to make an acoustic measure of one room, so I can compare it with a acoustic measure of some other room. Then compare these data. So when I take an acoustic measure of the first room again, I could recognize that i am in the first room again. Next down... | {
"domain": "dsp.stackexchange",
"id": 1319,
"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": "fft, sound",
"url": null
} |
php, jquery, laravel
Authentication:
public function postLogin(Request $request) {
$username = $request['usernameText'];
$password = $request['passwordText'];
$db = $this->openDatabaseDefault();
$selectHash = "SELECT USR_Password,USR_UserId FROM gaig_users.users WHERE USR_Username='$username';";
if... | {
"domain": "codereview.stackexchange",
"id": 20717,
"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": "php, jquery, laravel",
"url": null
} |
php
What happens if you don't want to use anymore a standard SQL database to store your users?
Open/Closed Principle:
your classes, functions, modules, packages, bundles should be open for extension, and closed for modification. What this means is that the behavior of your class can be modified without altering the c... | {
"domain": "codereview.stackexchange",
"id": 3518,
"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": "php",
"url": null
} |
error-correction, trace-distance, quantum-metrology, metrics, fubini-study-metric
Title: Prove that the Bures metric satisfies a contractive property and has unitary invariance In this paper, the authors assert that the Bures metric satisfies a contractive property and has unitary invariance. These terms aren't define... | {
"domain": "quantumcomputing.stackexchange",
"id": 3759,
"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": "error-correction, trace-distance, quantum-metrology, metrics, fubini-study... |
or a 5-percent annual rate of return. A bond is a loan. One way to minimize risk is to invest in a variety of companies in different sectors and asset classes (ie: stable value funds, bonds, real estate and stocks) over a long period of time. Content Guidelines 2. With investing, the point is to earn a good rate of ret... | {
"domain": "schrijfeenbouquet.nl",
"id": null,
"lm_label": "1. Yes\n2. Yes",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9697854146791214,
"lm_q1q2_score": 0.806030409381157,
"lm_q2_score": 0.8311430520409023,
"openwebmath_perplexity": 1693.8225016339977,
"openwebmath_score": 0.32949429750442505,
... |
quantum-field-theory, standard-model, virtual-particles, carrier-particles, quasiparticles
sum of all Feynman diagrams has predictive value, and the small ones
contribute most - otherwise we couldn't do any perturbative
calculations.
Moreover, this view contradicts the way QFT computations are actually
used. Scatt... | {
"domain": "physics.stackexchange",
"id": 2551,
"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": "quantum-field-theory, standard-model, virtual-particles, carrier-particles, quasipa... |
terminology, stem-cells
If expansion meant population-expansion, then would that not mean the same thing as repopulation? Likewise, self-renewal occurs through asymmetric cell-division in which a parent cell divides into two daughter cells; or it can occur through symmetric cell-division in which a parent cell divides... | {
"domain": "biology.stackexchange",
"id": 10617,
"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": "terminology, stem-cells",
"url": null
} |
complexity-classes, regular-expressions
Câmpeanu, Cezar, Kai Salomaa, and Sheng Yu. "A formal study of practical regular expressions." International Journal of Foundations of Computer Science 14.06 (2003): 1007-1018. | {
"domain": "cstheory.stackexchange",
"id": 4399,
"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": "complexity-classes, regular-expressions",
"url": null
} |
classical-mechanics, energy, angular-momentum, rotation, rotational-kinematics
But this naive expectation appears to be wrong: it sure looks to me like $v_+ \gg v_-$, and therefore $\frac{1}{2}mv_+^2 \gg \frac{1}{2}mv_-^2$.
(It is possible that what I'm calling a "horizontal channel" is not so, and that its leftmost e... | {
"domain": "physics.stackexchange",
"id": 26921,
"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": "classical-mechanics, energy, angular-momentum, rotation, rotational-kinematics",
... |
converting, vba, csv, excel
' some code
Set colSF = GetSubFolders(CSVfolder)
For Each vFile In colSF
fname = Dir(CSVfolder & vFile & "\" & "*.csv")
Do While fname <> ""
bHadFiles = True
Application.ScreenUpdating = False
Set wBook = Workbooks.Open(CSVfolder... | {
"domain": "codereview.stackexchange",
"id": 14380,
"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": "converting, vba, csv, excel",
"url": null
} |
c#, algorithm, recursion, time-limit-exceeded
Finding the n-th lexicographic permutation of a string on Mathematics Stack Exchange,
Find n-th lexicographically permutation of a string | Set 2 on GeeksforGeeks.
The idea is to compute at every step how many permutations start with an H and how many start with a V and t... | {
"domain": "codereview.stackexchange",
"id": 39752,
"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": "c#, algorithm, recursion, time-limit-exceeded",
"url": null
} |
multiverse
The "voltage" bit is about a hypothetical transporter used to communicate between the two universes, which suffers a malfunction and sends a voltage surge in one of the universes.
Now, I understand the concept. The two universes just keep diverging, with the light and the radiation leaving the starship bein... | {
"domain": "physics.stackexchange",
"id": 73967,
"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": "multiverse",
"url": null
} |
javascript
You can club together some statements
blocks = this._sortSelectors(lines);
blocks = this._sortParameters(blocks);
can become
blocks = sortParameters(sortSelectors(lines));
and
s = this._makeString(blocks);
s = this._addBlankLineBetweenBlocks(s);
s = s.trim();
can become
s = this.separateBlo... | {
"domain": "codereview.stackexchange",
"id": 38947,
"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",
"url": null
} |
python, performance, object-oriented, game
coin.center_y += coin.change_y
walls_hit = arcade.check_for_collision_with_list(coin, self.rooms[self.current_room].wall_list)
for wall in walls_hit:
if coin.change_y > 0:
coin.top = w... | {
"domain": "codereview.stackexchange",
"id": 39842,
"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": "python, performance, object-oriented, game",
"url": null
} |
### Titan97
In which case does the sphere get -q/2 charge? Is it when the sphere is grounded? But in that case as well, initial charge on he sphere is zero.
14. Nov 26, 2015
### SammyS
Staff Emeritus
For there to be an equipotential surface at the location of the surface of the sphere, you replace the sphere with t... | {
"domain": "physicsforums.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9653811631528336,
"lm_q1q2_score": 0.8205461640371072,
"lm_q2_score": 0.8499711775577736,
"openwebmath_perplexity": 816.6407848231897,
"openwebmath_score": 0.7912597060203552,
... |
structural-engineering, structural-analysis, statics
So, basically, the only difference between the hinged and fixed cases is in the rotational stiffness (as would intuitively be expected). This increased stiffness, however, causes the node to pull in a greater proportion of all forces, thereby increasing the axial fo... | {
"domain": "engineering.stackexchange",
"id": 965,
"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": "structural-engineering, structural-analysis, statics",
"url": null
} |
python, beginner, python-3.x
Unnecessary work
Why compute the perfect squares starting from 1 if you are going to filter this value later on?
Why compute all these values at all if you're only going to take the max of all factors?
You also compute sqrt(n) and max(factor) several time when you could store the result i... | {
"domain": "codereview.stackexchange",
"id": 22404,
"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": "python, beginner, python-3.x",
"url": null
} |
general-relativity, gravity, reference-frames, inertial-frames
Einstein on the other hand would suggest that an individual standing on the earth is NOT an Inertial frame of reference, and that the apple itself represents an inertial frame of reference. More broadly, an inertial frame of reference is one in which an ob... | {
"domain": "physics.stackexchange",
"id": 31826,
"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": "general-relativity, gravity, reference-frames, inertial-frames",
"url": null
} |
if you have the amplitude and the period and the phase shift ho would you know where to start and where to end?
rotation by 80 of (x^2/9)-(y^2/16)=1
thanks the domain is good but a i would like to get some other examples of how to find the range of a function
what is the standard form if the focus is at (0,2) ?
a²=4
hi... | {
"domain": "quizover.com",
"id": null,
"lm_label": "1. Yes\n2. Yes",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.968381236381426,
"lm_q1q2_score": 0.8152081553387761,
"lm_q2_score": 0.8418256412990657,
"openwebmath_perplexity": 398.43994312366834,
"openwebmath_score": 0.7264260053634644,
"tags": n... |
ros, gazebo, gazebo-ignition
Title: Gazebo Ignition how to bridge SerializedStepMap I have a robot in .sdf, that I'm simulating in Gazebo Ignition. For further development I need TF of that robot. How can I get it?
I found information, that TF is published to /world/<world_name>/model/<model_name>/state (source), in m... | {
"domain": "robotics.stackexchange",
"id": 38541,
"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, gazebo, gazebo-ignition",
"url": null
} |
java, object-oriented, playing-cards
Title: OOP implementation of Blackjack in Java - part 2 Part 1
Last time I got a lot of great advice, so this is take two with all that in mind:
My main concern with this implementation is the use of Inheritance (A base Player) vs having that as a interface - as that would lead to ... | {
"domain": "codereview.stackexchange",
"id": 25626,
"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": "java, object-oriented, playing-cards",
"url": null
} |
java, error-handling
public Try(Supplier<T> tryExpr) {
this.tryExpr = tryExpr;
}
public Try<T> catching(Class ex, Function<Exception, T> handler) {
if(handlers.containsKey(ex)) {
throw new IllegalStateException("exception " + ex.getSimpleName() + " has already been caught");
... | {
"domain": "codereview.stackexchange",
"id": 33635,
"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": "java, error-handling",
"url": null
} |
key crypto exist in EC. The receiver of the ciphertext uses. Modular arithmetic. Cryptography - Lesson 2 Modular Arithmetic is a fundamental component of cryptography. In contrast to subjects such as arithmetic and geometry, which proved useful in everyday problems in commerce and architecture, as-. CX4024 CRYPTOGRAPHY... | {
"domain": "remmantova.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9942697522964353,
"lm_q1q2_score": 0.8174777853108608,
"lm_q2_score": 0.8221891327004132,
"openwebmath_perplexity": 958.0978312245458,
"openwebmath_score": 0.45587220788002014,
"ta... |
classical-electrodynamics, electromagnetic-induction
Title: Why should a conductor loop moving towards a magnet have an induced current? If we place a bar magnet along the x axis, the magnetic field near its poles would be parallel to the x axis. Now, let's bring a circular loop near the the magnet, moving the loop al... | {
"domain": "physics.stackexchange",
"id": 49474,
"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": "classical-electrodynamics, electromagnetic-induction",
"url": null
} |
fluid-mechanics, measurements
Title: Determine volume of liquid in a fluid bladder I am trying to determine if it is possible to "physically" determine the volume of liquid (such as water) in a non-solid container like a fluid bladder like this or this?
Assume that it is not possible to keep accurate track of the diff... | {
"domain": "engineering.stackexchange",
"id": 995,
"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": "fluid-mechanics, measurements",
"url": null
} |
thermodynamics
Title: Shouldn't all isothermal processes be adiabatic? We know, $\mathrm{d}H = nC_p\mathrm{d}T$ which implies $\mathrm{d}H = f(\mathrm{d}T)$ using $\mathrm{d}H = \mathrm{d}U + \mathrm{d}PV$ and $\mathrm{d}q = \mathrm{d}U + \mathrm{d}w$ we get $\mathrm{d}H=\mathrm{d}q$
In isothermal process, $\mathrm{d... | {
"domain": "chemistry.stackexchange",
"id": 10616,
"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": "thermodynamics",
"url": null
} |
sum_beauties_above(x,c) =
if x = 0 then 0
else
let n = smallest_n(x,c,0) in
let n' = sum_beauties_above(x - s(n,c),c+1) in
2^n + n'
sum_beauties_above(x,0)
the first function takes $$O(n)$$ time, the second takes $$\tilde O(\log X)$$. The main function calls itself as many times as $$N$$ has bits set to $$1$$, which ... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9787126482065489,
"lm_q1q2_score": 0.809113280921341,
"lm_q2_score": 0.8267117855317474,
"openwebmath_perplexity": 276.1390047829813,
"openwebmath_score": 0.8403070569038391,
"tags... |
optics, visible-light, reflection
Also, trying to do it by making the mirror face the floor is not going to work well. You're trying to re-bounce the light coming off of your floor (a diffuse reflector) but you're not seeing much because the effect is so faint, it's hardly noticeable. Also, by directing the mirror at ... | {
"domain": "physics.stackexchange",
"id": 95000,
"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": "optics, visible-light, reflection",
"url": null
} |
computational-physics, dimensional-analysis, complex-systems, fractals
140 9929
141 10037
142 10143
143 10274
144 10429
145 10549
146 10659
147 10766
148 10873
149 10978
150 11086
151 11196
152 11315
153 11445
... | {
"domain": "physics.stackexchange",
"id": 58788,
"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": "computational-physics, dimensional-analysis, complex-systems, fractals",
"url": ... |
bond, intermolecular-forces
When forces acting between two atoms or groups of atoms lead to the formation of a stable independent molecular entity, a chemical bond is considered to exist between these atoms or groups. The principal characteristic of a bond in a molecule is the existence of a region between the nuclei ... | {
"domain": "chemistry.stackexchange",
"id": 9717,
"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": "bond, intermolecular-forces",
"url": null
} |
beginner, programming-challenge, rust, roman-numerals
where Digit_1 is the lowest digit in the group (I, X, C)
Digit_5: V, L, D
Digit_10: X, C, M
impl Solution {
pub fn int_to_roman(num: i32) -> String {
pub fn make_digit(digit: i32, c10: char, c5: char, c1: char) -> String {
let mut res = ""... | {
"domain": "codereview.stackexchange",
"id": 43959,
"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": "beginner, programming-challenge, rust, roman-numerals",
"url": null
} |
phase, finite-impulse-response, linear-phase
(It's always good to remind oneself that frequency is just the derivative of phase over time, $\omega=\frac{d\varphi}{dt}$, and thus phase is just an integral of frequency over time.) | {
"domain": "dsp.stackexchange",
"id": 5805,
"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": "phase, finite-impulse-response, linear-phase",
"url": null
} |
html, css
CSS
body{
background: #ccc;
margin: 0;
}
content{
width:1000px;
}
div {
background-color: #fff;
width: 500px;
height: 200px;
padding:15px;
margin:15px;
}
.left{
float: left;
}
.right{
float: right;
}
/* Basic Shadow */
.shadow1{
box-shadow: 5px 5px 0 rgba(150,150,... | {
"domain": "codereview.stackexchange",
"id": 6182,
"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": "html, css",
"url": null
} |
angular-momentum, electrons, atomic-physics
As a side note: the Bohr model is a proto-quantum mechanical model - it had some quantized features but was not a fully developed theory, so treat it with a little skepticism (in particular, it does not describe the ground state that has zero angular momentum, among other sh... | {
"domain": "physics.stackexchange",
"id": 44790,
"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": "angular-momentum, electrons, atomic-physics",
"url": null
} |
condensed-matter, field-theory, greens-functions, propagator, coherent-states
Title: Representing Green function as a coherent state path integral I am working through the problem "self-consistent T-matrix approximation" in Altland and Simons (second edition) pg 234. One of the steps involves representing the Green fu... | {
"domain": "physics.stackexchange",
"id": 82433,
"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": "condensed-matter, field-theory, greens-functions, propagator, coherent-states",
... |
turing-machines, turing-completeness, machine-models
It seems to me that, although you can encode any integer with the language 0∗, you can't encode an arbitrary language.
This is also incorrect. You can encode any natural number $n$ with the single string $0^n$ and, therefore, you can code any set of natural numbers... | {
"domain": "cs.stackexchange",
"id": 2750,
"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": "turing-machines, turing-completeness, machine-models",
"url": null
} |
# Plotting complex Sine
I've got another plotting problem. I want to plot Sin[z] where z is complex. So, I've tried the following:
Plot3D[ Sin[ x + I y], {x, -1, 1}, {y, -1, 1}]
I wanted to see how the sine function looks like on the unit circle. But... I get no output. Am I doing something wrong or is the kernel s... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.959154281754899,
"lm_q1q2_score": 0.8637469989225359,
"lm_q2_score": 0.9005297847831082,
"openwebmath_perplexity": 4979.049729186961,
"openwebmath_score": 0.3071395456790924,
"tags... |
exoplanet, spectroscopy, james-webb-space-telescope, trappist-1
are lots of websites and even Youtube videos telling me exactly how to download data from the MAST archive
There are indeed lots of JWST data on Trappist-1 in the MAST archive - 165 data files in total. Just go to this site, search by "Trappist-1" and the... | {
"domain": "astronomy.stackexchange",
"id": 6643,
"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": "exoplanet, spectroscopy, james-webb-space-telescope, trappist-1",
"url": null
} |
The maximum likelihood equations are derived from the probability distribution of the dependent variables and solved using the Newton- Raphson method for nonlinear systems of equations. We consider a 2×2 contingency table, with dichotomized qualitative characters (A,A) and (B,B), as a sample of size n drawn from a biva... | {
"domain": "luvluv.net",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9755769092358046,
"lm_q1q2_score": 0.8021087222608457,
"lm_q2_score": 0.822189121808099,
"openwebmath_perplexity": 388.8990139053514,
"openwebmath_score": 0.8958356380462646,
"tags": null... |
## 2 Answers
Let $$a_n$$ denote the number of good colorings of a $$2\times n$$ grid. You want to compute $$a_5$$. The initial conditions are $$a_0 = 1$$ and $$a_1 = 4$$. To derive a recurrence relation for $$a_n$$, consider the four possibilities for the two cells in the leftmost column. You will find that $$a_n = 3 ... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.988312744413962,
"lm_q1q2_score": 0.8299197861317218,
"lm_q2_score": 0.8397339716830605,
"openwebmath_perplexity": 217.7731899211514,
"openwebmath_score": 0.9971148371696472,
"tags... |
python, gui, tkinter, framework, tk
label = tk.Label(root, text='test', fg='white',
bg=root['bg'], font=root.font)
label.pack(fill = tk.BOTH, expand=True)
### You can toggle fullscreen by pressing F11
root.mainloop()
You can also add and change shorthands for the set() and get() methods using list ... | {
"domain": "codereview.stackexchange",
"id": 35653,
"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": "python, gui, tkinter, framework, tk",
"url": null
} |
oceanography
There were many things that limited the efficiency of sonar (or ASDIC as the British called it). It is true that sea water has a tendency to separate itself into layers which sonar finds difficult to penetrate. Sometimes this layering was based on differences in salinity, sometimes on differences in tempe... | {
"domain": "earthscience.stackexchange",
"id": 1842,
"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": "oceanography",
"url": null
} |
c++
moves_.clear();
scramble_sequence_.clear();
}
//************************************
// Method: get_cube
// FullName: cube::get_cube
// Access: private
// Returns: void
// Qualifier: const
// Parameter: std::vector<face_val<face_val_type>> & pattern
//************************************
void cube::... | {
"domain": "codereview.stackexchange",
"id": 38762,
"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": "c++",
"url": null
} |
organic-chemistry, reactivity
The author seems to imply that the formation of an alkene from a carbocation is energetically more favorable than the formation of an $\mathrm{S_N1}$ product. Why?
Once the carbocation is formed, the step leading to the $\mathrm{S_N1}$ product requires the formation of a sigma bond wherea... | {
"domain": "chemistry.stackexchange",
"id": 8757,
"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": "organic-chemistry, reactivity",
"url": null
} |
frequency, radio-frequency
But if you want GHz bandwidths you have to go higher. So it all depends on what you want.
If empty space they all go like $1/r^2$. At lower freqs you do need bigger antennas, if you want the same beam size. if omni unless you go to HF and below its no big deal. At real high freqs, above 1... | {
"domain": "physics.stackexchange",
"id": 97175,
"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": "frequency, radio-frequency",
"url": null
} |
The first list is more desirable to me since the range is bigger - we can see the list is descending more strongly. Should I use spearmans rank instead? If so, why?
• Could you clarify your rationale for the second example, why and how exactly (10, 8, 6, 7, 4, 2) is "better" than (10.5,10.4,10.3, 10.1, 8, 6)..?
– Tim
... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9688561676667173,
"lm_q1q2_score": 0.8094633798910579,
"lm_q2_score": 0.8354835391516133,
"openwebmath_perplexity": 702.0075100152944,
"openwebmath_score": 0.67491614818573,
"tags"... |
gazebo, navigation, ros-kinetic, amcl
Originally posted by renangm with karma: 183 on 2019-02-24
This answer was ACCEPTED on the original site
Post score: 2
Original comments
Comment by the3kr on 2019-02-24:
Thanks for detail answer, It's really helpful. I'll explore the GPS and sensor fusion approach as well. I'm cu... | {
"domain": "robotics.stackexchange",
"id": 32519,
"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": "gazebo, navigation, ros-kinetic, amcl",
"url": null
} |
htslib
Title: Reading same BAM file twice with htslib I would like to read iteratively the same BAM file twice using htslib.
My option is to use hts_open, sam_hdr_read, then sam_read1 as much as needed to read the file until EOF.
Is there a possibility to "rewind", and use sam_read1 again from the beginning of the fil... | {
"domain": "bioinformatics.stackexchange",
"id": 2499,
"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": "htslib",
"url": null
} |
quantum-mechanics
$$|1\rangle\rightarrow(|0\rangle-|1\rangle)/\sqrt{2}$$
$$|0\rangle\rightarrow(|0\rangle+|1\rangle)/\sqrt{2}$$
The first step in the algorithm is to prepare my two qubits as $|0\rangle|1\rangle$ and then apply this transformation, giving me the state $(|0\rangle+|1\rangle)(|0\rangle-|1\rangle)/2$. Now... | {
"domain": "physics.stackexchange",
"id": 299,
"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": "quantum-mechanics",
"url": null
} |
java, benchmarking
private void appendStats(StringBuilder stringBuilder, List<MeasuredProcedure> measuredProcedures) {
String tabLeader = Defaults.TAB_LEADER;
long referencedAverage = referencedProcedure.getReference(new MeasurementInputs(measuredProcedures, timesRun));
MeasuredProcedure curren... | {
"domain": "codereview.stackexchange",
"id": 44781,
"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": "java, benchmarking",
"url": null
} |
javascript, jquery, animation
var jump = parseFloat($(".cube").css("height"));
if (key_up === true) {
$(".cube").css("height", function () {
jump += (gravity);
if (jump < 402) {
return jump.toString() + "px";
}
});
} else if (key_up === false) {
$(".cube").css("height",... | {
"domain": "codereview.stackexchange",
"id": 32766,
"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, jquery, animation",
"url": null
} |
python, numpy, pandas, machine-learning, data-visualization
if __name__ == '__main__':
folder = 'test_photos/'
target = 'Dog'
photo_display_size = (10, 2, 5)
predict_from_folder(
folder,
target,
display_initial_images=photo_display_size,
show_initial_details=True,
... | {
"domain": "codereview.stackexchange",
"id": 44241,
"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": "python, numpy, pandas, machine-learning, data-visualization",
"url": null
} |
this lesson is a review for them. Suppose t represents time in seconds and the position xy at time t is given by the equations x equals t squared plus 1, y=4t for t greater than or equals 0. Suppose C represents the motion of a particle. Free Precalculus worksheets created with Infinite Precalculus. Key important point... | {
"domain": "24-aktuell.de",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.981735720045014,
"lm_q1q2_score": 0.818104519577978,
"lm_q2_score": 0.8333245932423308,
"openwebmath_perplexity": 942.8280130387689,
"openwebmath_score": 0.6091794371604919,
"tags"... |
Very nice! Thanks for being so persistent.
If we take only one term of the series then the continued fraction becomes
$\frac \pi 4 = 1-\cfrac{1}{4+\cfrac{1^2}{1+\cfrac{2^2}{4+\cfrac{3^2}{1+\cfrac{4^2}{4+\cfrac{5^2}{1+\ddots}}}}}}$
which resembles Brouncker's formula:
$\frac 4 \pi = 1+\cfrac{1^2}{2+\cfrac{3^2}{2+\c... | {
"domain": "hpmuseum.org",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9706877692486436,
"lm_q1q2_score": 0.8250566281136977,
"lm_q2_score": 0.8499711794579723,
"openwebmath_perplexity": 739.0489867315196,
"openwebmath_score": 0.7081336379051208,
"tags": n... |
hopefully....
Last edited:
#### topsquark
##### Well-known member
MHB Math Helper
$\left[\begin{array}{r} 1\\3\\ -1 \end{array}\right]v+ \left[\begin{array}{r} -5\\-8\\2 \end{array}\right]w =\left[\begin{array}{r} 3\\-5\\ \color{red}{h} \end{array}\right]$
so then the augmented matrix would be
$\left[\begin{array}{r... | {
"domain": "mathhelpboards.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9724147153749275,
"lm_q1q2_score": 0.8245763189379199,
"lm_q2_score": 0.8479677506936878,
"openwebmath_perplexity": 1591.7137322850854,
"openwebmath_score": 0.7172309160232544,
... |
c#, multithreading, wpf, mvvm
return myChildren;
}
Our getter will then be:
public ObservableCollection<TreeItemViewModel> Children
=> EnsureChildrenAreLoaded(myChildren, 0);
Major difference is that we're going through the children to determine if they have to be loaded in the calling UI thread but we're queuin... | {
"domain": "codereview.stackexchange",
"id": 26952,
"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": "c#, multithreading, wpf, mvvm",
"url": null
} |
computational-chemistry, molecular-orbital-theory, theoretical-chemistry
$$\psi_i=\sum_{\mu=1}^KC_{\nu i}\phi_\nu$$
For the molecular orbitals to be orthonormal we can write the following condition:
$$\left< \left. \psi_i \right|\psi_j\right>=\delta_{ij}$$
This means that the orbitals have zero overlap with one-anothe... | {
"domain": "chemistry.stackexchange",
"id": 10276,
"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": "computational-chemistry, molecular-orbital-theory, theoretical-chemistry",
"ur... |
c++, error-handling, optional
Decide how to deal with use of Result<std::string>
If you use Result<std::string>, the function operator bool will always return true. For that use case, there is no way to tell whether a function returned with success or failure.
One way to deal with the problem will be to prevent use of... | {
"domain": "codereview.stackexchange",
"id": 44364,
"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": "c++, error-handling, optional",
"url": null
} |
mountains, geography, paleogeography, isostasy, mountain-building
Everest and the Himalaya have reached their maximum possible elevation: the formation of the Tibetan plateau is due to the failure of rocks preventing the maintenance of discrete mountain peaks. The principle of uniformitarianism suggests that - subject... | {
"domain": "earthscience.stackexchange",
"id": 256,
"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": "mountains, geography, paleogeography, isostasy, mountain-building",
"url": nu... |
quantum-mechanics, angular-momentum, quantum-spin, group-theory, representation-theory
Although I suspect there is no direct answer to this question, I would appreciate if someone could enlighten me on the subject. In particular, what is the role of the $i$ factor?
At the level of formulas, the three quaternionic uni... | {
"domain": "physics.stackexchange",
"id": 75713,
"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": "quantum-mechanics, angular-momentum, quantum-spin, group-theory, representation-th... |
c#, task-parallel-library
I would also suggest using TPL Dataflow as it can increase concurrency by running steps in parallel with a few simple building blocks. Dataflow does include a bit of boilerplate setup code but it's easy implement and reorganize blocks.
Here's an dataflow implementation of your program:
using ... | {
"domain": "codereview.stackexchange",
"id": 30490,
"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": "c#, task-parallel-library",
"url": null
} |
php, strings, array
Title: PHP split string into uneven parts I am trying to split a string so that the first word goes into the first span, and the remaining (an unknown number of words) goes into the next.
This currently works fine, but is there an easy / faster / tidier way to do it ?
<?
// Explode the job role out... | {
"domain": "codereview.stackexchange",
"id": 30794,
"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": "php, strings, array",
"url": null
} |
catkin-make
How can I solve this problem?
Regards
Originally posted by Andromeda on ROS Answers with karma: 893 on 2014-09-06
Post score: 0
Original comments
Comment by Dirk Thomas on 2014-09-06:
Besides your question you should move your header file into a separate "include" folder - actually in a subfolder "includ... | {
"domain": "robotics.stackexchange",
"id": 19317,
"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": "catkin-make",
"url": null
} |
electrostatics, maxwell-equations, method-of-images
4\pi\delta(z-z_0)e^{i\mathbf{k}\mathbf{r}_0}.
$$
This is a second order equation of type
$$
\frac{d}{dx}\left[p(x)\frac{d}{dx}y(x)\right] - k^2p(x)y(x) = 0.
$$
In general case this equation is not solvable, but it has known solutions for many types of function $p(x)... | {
"domain": "physics.stackexchange",
"id": 65832,
"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": "electrostatics, maxwell-equations, method-of-images",
"url": null
} |
c++, design-patterns, game, classes
If you plan using the manager like a singleton (having only one instance and everyone can access it), maybe the manager and manager::instance classes could be merge into a single one, where manager members would become static and manager::instance would become an actual instance of ... | {
"domain": "codereview.stackexchange",
"id": 9960,
"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": "c++, design-patterns, game, classes",
"url": null
} |
means a very small number, which is very close to zero. Before the concept of a limit had been formally introduced and understood, it was not clear how to explain why calculus worked. (mathematics) A non-zero quantity whose magnitude is smaller than any positive number (by definition it is not a real number). Phew! Rob... | {
"domain": "webd.pl",
"id": null,
"lm_label": "1. Yes\n2. Yes",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.966914017797636,
"lm_q1q2_score": 0.8383490367286989,
"lm_q2_score": 0.8670357666736772,
"openwebmath_perplexity": 1423.211244597237,
"openwebmath_score": 0.6825891137123108,
"tags": null,
... |
java, android, bluetooth
/**
* Set the connection state.
*
* @param state
*/
public synchronized void setState( int state ) {
if( D ) Log.d( TAG, "setState() " + myState + " -> " + state );
myState = state;
myHandler.obtainMessage( AndroidBluetooth.MESSAGE_STATE_CHANGE... | {
"domain": "codereview.stackexchange",
"id": 1910,
"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": "java, android, bluetooth",
"url": null
} |
ros, header
Title: Which frame_id do I usually specify for the NavSatFix header?
The coordinate system in NavSatFix is known by the fact that we are using WSG84 coordinates. But how do I specify the frame_id in the header? Is there some standard name for this frame, or will it be different in every project?
Original... | {
"domain": "robotics.stackexchange",
"id": 21789,
"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, header",
"url": null
} |
Chapter 1 is an introductory and user-friendly discussion of topics that were mentioned in earlier posts, such as basic arithmetic, formal systems, (in)completeness, consistency, the statement of Gödel's incompleteness theorems and some of their implications. Therefore, in this post, I will just highlight the points wh... | {
"domain": "blogspot.my",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9907319855244919,
"lm_q1q2_score": 0.8572051749767012,
"lm_q2_score": 0.865224084314688,
"openwebmath_perplexity": 587.8367039734752,
"openwebmath_score": 0.7829540371894836,
"tags": nul... |
ros, kinect, ros-groovy
</noise>
</camera>
<always_on>1</always_on>
<visualize>true</visualize>
<plugin name="Xtion_frame_controller" filename="libgazebo_ros_openni_kinect.so">
<alwaysOn>true</alwaysOn>
<updateRate>20.0</updateRate>
<cameraName>xtion</cameraName>
... | {
"domain": "robotics.stackexchange",
"id": 3449,
"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, kinect, ros-groovy",
"url": null
} |
newtonian-mechanics, collision
Any changes to the body's (internal or external) structure.
Mental trauma – I would attribute it to the double derivative of the velocity (i.e., jolt). But this is highly subjective. Some people would attribute it to the impact while others would attribute it to the total energy transfer... | {
"domain": "physics.stackexchange",
"id": 3581,
"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": "newtonian-mechanics, collision",
"url": null
} |
electricity, charge, potential
Now, coming to the second part of your question - what if we don't ground the sphere? Well, we would need to modify our image charge distribution somehow to account for the new boundary conditions. There are two conditions that we need to meet: first, the total charge in the image charge... | {
"domain": "physics.stackexchange",
"id": 21964,
"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": "electricity, charge, potential",
"url": null
} |
classical-mechanics, kinematics
On a typical small airplane, each propeller blade, of length about 3 feet, can absorb about 100 horsepower and generate about 200 lb of thrust at about 2400 rpm.
On the F4U Corsair, a WW2 fighter plane, the propeller was about twice that radius, so it had to turn at about 1/2 that speed... | {
"domain": "physics.stackexchange",
"id": 52712,
"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": "classical-mechanics, kinematics",
"url": null
} |
c#, performance, winforms, timer
EDIT:
I still want to see your example usage
The usage is fairly straightforward. You inject the service into your form's constructor (or instantiate it there if you do not care much about IoC) and store it as a field, say _monitor. Then you just wire your UI to appropriate methods. ... | {
"domain": "codereview.stackexchange",
"id": 23836,
"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": "c#, performance, winforms, timer",
"url": null
} |
complexity-theory, computability, np, polynomial-time-reductions, theory
Disclaimer
I am not an expert in this topic. These are just some preliminary notes on the idea, and I am not sure if someone has studied this in the literature.
P.S. Although it may not be directly related, your question about considering effecti... | {
"domain": "cs.stackexchange",
"id": 15540,
"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": "complexity-theory, computability, np, polynomial-time-reductions, theory",
"url": nul... |
molecular-biology, cell-biology, cell-signaling
Title: What happens to IP3 molecules after release from IP3 receptors? IP3 molecules bind to IP3 receptors and open up the calcium channels on the endoplasmic reticulum. I am wondering what happens to IP3 molecules after they have been released from the IP3 receptor? Do ... | {
"domain": "biology.stackexchange",
"id": 4217,
"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": "molecular-biology, cell-biology, cell-signaling",
"url": null
} |
javascript, jquery, plugin
Title: Changing a single jQuery plugin option on window resize I'm looking to change a single jQuery plugin option when the window hits certain breakpoints.
The code below works, however I'm conscious of repeating code and feel there is a more elegant way writing code for examples like this.... | {
"domain": "codereview.stackexchange",
"id": 7430,
"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, jquery, plugin",
"url": null
} |
sift, scale-space
For $s=3$ this means you will have $s + 3 = 6$ blurred images (the Gaussian images shown in the paper in Figure 1 on the left). Having $6$ Gaussian images will result in $5$ DoG images (shown in Figure 1 on the right). This will allow you to do the extrema detection on $s=3$ scales (using the method ... | {
"domain": "dsp.stackexchange",
"id": 1090,
"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": "sift, scale-space",
"url": null
} |
c++, performance, algorithm, divide-and-conquer
Use assert() to check for things that should never happen
In left() and right(), you check if n < 2, and exit immediately if so. It looks like this situation should never occur though, and these checks are just there to guard against programming errors. This is a good pr... | {
"domain": "codereview.stackexchange",
"id": 42989,
"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": "c++, performance, algorithm, divide-and-conquer",
"url": null
} |
y {! 1 + x y ) very important functions in many areas: exponential. As a definition of the Derivative. both of these functions if you are a. There would come a time when there would come a time when there would a. Two very important functions in many areas: the exponential function is a product of infinite! Means growi... | {
"domain": "cesarabeid.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9808759610129464,
"lm_q1q2_score": 0.8639526879919818,
"lm_q2_score": 0.880797085800514,
"openwebmath_perplexity": 699.6434986899695,
"openwebmath_score": 0.8123491406440735,
"tags": ... |
### Solving a system of difference equations in an exponential steady-state growth setting
I have a system of difference equations in an exponential steady-state balanced growth setting; all variables grow at the same steady-state rate, say, $g$. I use the notations as follows: Variable $X$ ...
76 views
### Eliminate... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9433475746920262,
"lm_q1q2_score": 0.8162070464209991,
"lm_q2_score": 0.8652240895276223,
"openwebmath_perplexity": 1575.3579198486266,
"openwebmath_score": 0.8509925603866577,
"ta... |
operators, conformal-field-theory, stress-energy-momentum-tensor
Title: Inconsistency in Virasoro expansion of stress energy As explained in Axiom 2.3 on page 7 of https://arxiv.org/abs/1609.09523, the independence of the stress tensor $$T(y)=\sum_{n}\frac{L_n}{(y-z)^{n+2}}$$ on the choice of expansion point $z$ leads... | {
"domain": "physics.stackexchange",
"id": 99884,
"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": "operators, conformal-field-theory, stress-energy-momentum-tensor",
"url": null
} |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.