3d Definition and 1000 Threads

Hello, I'm running a galaxy formation simulation. The output specifies the coordinates in (x, y, z) of all the particles in a galaxy, which usually fall in a disk. The orientation of the disk depends on the initial conditions, but it is generally not aligned with any of the coordinate axes...

What are the differences between 3d Nano-materials and bulk materials?

Hello community, this is my first post and i start with a question about the famous dirac delta function. I have some question of the use and application of the dirac delta function. My first question is: Using Dirac delta functions in the appropriate coordinates, express the following charge...

Hello all, I am anew user for Ansoft Maxwell, I am doing simulation for tubular machine in 3D, I have problem with band assignment, when I run the analysis there is a massage error after the mesh, which said [error] Error in mesh mapping on band, please check the potential problem in band...

I''m facing problem in modelling and analyzing a permanent magnet in 3D. kindly help me out.

When we obtain the velocity vector for position vector (r, θ, φ) Why do we take the time derivative of the radial part in the 3D Spherical Coordinate system only? Don't we need to consider the polar angle and azimuthal angle part like (dr/dt, dθ/dt, dφ/dt)?

Suppose we have a 3D potential box having different length. Now suddenly we double the length of a particular side(Say along X direction) of the box. Can we calculate what will be the eigen function of the Hamiltonian. Is there Time Independent S.E. holds?

The tangential velocity of a body rotating about the centre point "O" is given by v=w.r, where w is angular velocity and r = radius. give that the vectors w = 3i - 2j + 7k r = 2i + 5j - 3k a) Calculate the magnitude of velocity b) the vector product in the form i+j+k So far I have the vector...

Homework Statement An OAB pipe is embedded in O. A cable BC = 1000N and F = ( 0,-f , 0) act on B. Question: Determine the magnitude of the force F as the resultant moment about the axis OA is canceled. Picture in attachment: Homework EquationsThe Attempt at a Solution O=(0 0 0) A=(1.5 0 0)...

Why if I create a Plot 3D using mathematica 8 the graph is not showed complete unless I hold the graph clicked with the mouse. I'm using Ubuntu 14.04 a weird fact is that in the same computer I have Windows 8 and If I run the program with Windows the graph is shown perfectly. May this question...

Homework Statement metal piece = 300N As this metal piece is in balance, what is the tension in each cable? Picture of the problem in attachment. Homework EquationsThe Attempt at a SolutionW = 300*[0 0 1] D to A: vtda = tda [sin(37), sin(37)*sin(90), -cos(37)] D to B: vtdb = tdb...

Can anyone show me how to solve the 3D diffusion equation which has been modeled into FDM by using matlab?

I'm looking for a two element 3D wind tunnel app. Any out there that will run on a PC?

Homework Statement How would I find the equation of a line which passes through A(x1, y1, z1) and is perpendicular to A(x1, y1, z1) B(x2, y2, z2), C(x3, y3, z3) Homework Equations Cartesian form of a line in \mathbb{R}^3 The Attempt at a Solution Not sure if this is right but would finding...

I am working on simulating the magnus effect of lift on a spinning ball. Right now spinning on the z axis I can calculate the force effect it has on the x and y coordinates. If I am to add spin on the x do I do the exact same calculations effecting the y and z coords and just add them to the z...

Usually in textbooks Ampere's law is just illustrated using 2D loops which forms a plane. Can the law be applied to 3D loops which cannot form a plane surface within the loop? In a 3D loop which surface should we count when we count the current? In 2D case it is easy because there can only be a...

Hello, What shape has the lowest drag coefficient at ground level and at subsonic speeds (0-150kph) with the following dimensions? Width 60cm (at 45%) Height 120cm (at 45%) Length 220cm These dimensions will fit my motorcycle (not too narrow and not too long). I am thinking it would be a...

:ey all, I'm seeking to write an egomotion program and want to do research into existing algorithms and the math of it, but googling "egomotion algorithms" doesn't seem to turn anything up, is there a more popular name for extrapolating 3d scen from 2d scene? Or can anyone post a link? Any help...

Is there an equation for say a line segment in 3D Cartesian Coordinates that is between these two points? Point One: x=0, y=0, z=0 Point Two: x=5, y=5, z=5 Does it involve inequalities?

The fundamental question, what is the reference geometry where images can be fused to form a 3D panorama? In other words, how images are assigned a 3D position? Does it require a gyroscope to be built in camera to define its position per image of the interest? Or just it simply fuses images with...

Hey all, I need to know when two triangles intersect in a 3D environment, given the 3 points. Any help apreciate have been stuck on this for a long time,

With all the hype of 3D printed organs lately, I've wondered: let's say that someone with terminal cancer in the liver undergoes a liver transplant with a completely new 3D printed organ. Assuming that this was the only organ affected, would this rid them of the cancer? If so, why? And if not...

For a research project, I have to take multiple derivatives of a Yukawa potential, e.g. ## \partial_i \partial_j ( \frac{e^{-m r}}{r} ) ## or another example is ## \partial_i \partial_j \partial_k \partial_\ell ( e^{-mr} ) ## I know that, at least in the first example above, there will be a...

Homework Statement Homework EquationsThe Attempt at a Solution a) for ##0 \le x,y,z \le a##, the potential is zero. Therefore, the 3d schrödinger equation is $$ - \frac {\hbar^{2}}{2m} \nabla^{2} \psi = E \psi $$ Is it okay to write 3 equations $$ - \frac {\hbar^{2}}{2m} \frac {\partial^{2}...

Hi all, Having some trouble getting the final answer on the question below, the fact that the cube doesn't have a force in the x direction is throwing me off. Once I fine the force(??) in the x-direction, I can just use the generalized Hooke's law to obtain strain? Any help is appreciated...

Why does it look like a ripple on a pond instead of a three dimensional object?

Hello, PhisicsForumsWe are a group of students from the Avans University of Applied Sciences. We're currently doing a project where we have to design and make a 3D pong console. The idea of the project is to make a "Dedicated Video Game Console" that can be remotely controlled by remotes using...

Hello, I was interested in making a game that renders 3d objects in the way they would look like in viewing them in real life. Rendering 3d objects takes lots of memory and processing power, and it may lag easily. So, I was wondering, what should I do to maximize efficiency in rendering 3d...

I'm a new user to both PF & Maxwell 3D. I've been having a lot of problems trying to draw a helical coil in Maxwell 3D v11. the problem is how to connect the two tub in 3D here is the image imported MAXWELL...

Hey I have a function of x,y,z and i want to have a 3D graph of it. i was thinking maybe there is a color option that corresponds with the value of the function, something like DensityPlot in Wolfram but in 3D instead of 2D. the result should look like a box filled with semi transparent color...

I've made a virtual solar system in Java3d. I'm trying to implement the orbiting of planets and ships. I get the basic formula F = G((m1*m2)/r^2))[\code] and saw a discussion here about the formula in 3d but, I don't know how to read a letter with an arrow over it, lol. Can someone help me...

hey there, i haven't find a better foru to post this, so i hope I am in the right place/ im looking for a 3d grapher saftware but good one, that can do directional directional derivative exc. so if u know about something thatll be great, thx!

Do you just cube a variable? How does it work? Has this been figured out yet? Any thoughts if it hasn't? Any applications if it has?

Hi I'm having an issue ANSOFT MAXWELL : Assigning a permanent magnetic material to a body (for ex NDFE35) provides me a means of setting the magnetization direction (through x,y,z unit vectors ) inside the material settings so if i have multiple PM bodies rotated :- 1- do i need to create a...

Can anyone give me a really simple example on how to use the eqn above to solve it? The eqn is the modified schrodinger eqn that takes into account relativity.

Can anyone give me a really simple example on how to use the eqn above to solve it?

Homework Statement Temperature varies by function T(x,y,z)=3x + 4y + 2z Path is given by r(t)={ x(t)=\frac{t^3}{30}+\frac{16t}{9}+7 y(t)=-\frac{t^3}{120}-\frac{13t^2}{30}+28 z(t)=\frac{13t^2}{60}+\frac{4t}{3}-14 t\in \left[0,10\right] Question: What is the maximum and minumun temperatures of...

hi dear friends i face with this error in Maxwell 3d analysis please help me Surface recovery failure. Possible reasons: (1). Model has multiple objects with thin layers. (2). Complex model with object overlapping. (3). True surfaces are skewed what should i do?

How do I sketch the radial distribution of a $3d_{x^2-y^2}$ orbital? :D

So I was doodling around and came up with a problem of finding an equation for a tilted parabola. Basically, a parabola in xy plane which was rotated around a line that goes through points (1,0) and (0,1), making the curve a 3D one. I realize that this curve is a subset of points that define a...

I have a doubt in 3d geometry. I calculus and I know how to do partial derivatives.(but I don't know what it means). If you have a parametric equation ##x=t, y=t^2,z=t^3## (the equation is randomn) What does ##\vec{r}=t\hat{i}+t^2\hat{j}+t^3\hat{k}## represent? now if it represents the position...

Hello all, I know 3d gradients are often represented by gradient vectors but in the current project I am working on it would be a lot more convenient for me to do it this way if possible, the X gradient is given by Δy/Δx, and the Z gradient by Δy/Δz how can one obtain the Y gradient?

hello! is there a way to reconstruct a whole head, by having a profil and enface photo of the person? thanks!

hello! I am looking for a 3d printer that can print in wax is there any? thanks!

Sorry for the confusing tittle but I could not explain it better. Here is what I am trying to ask: When you have 2 axis(x and y) such as the image below, the sum of the two angles, a and b will always be equal to 90 degrees. a + b = 90degrees However when you add a 3rd axis(x, y and z, making...

Homework Statement Hi, An equation of the form Ax + By + C = 0 is a standard equation of a line in 2D. An equation of the form Ax + By + Cz + D = 0 is an equation of a plane. Is it possible to: Describe a plane in space, written in standard form, such that one variable is missing from the...

just as the title says, how is 4s ionised first if 3d is higher in energy? also, how does argon have a full outershell if its 3d is empty?

In adobe photoshop, is it possible to take and wrap a 2D texture onto a 3D model? And is it also possible to make a 2D object from a photo into a 3D one?

Hi all, I am after some help to find out how to do the following: I have a triangular object (weighing around 40,000kg) which I can measure and weigh. I have 4 load indicators I can position anywhere beneath the object, these will give me a very accurate reading of the weight of the object at...

I was thinking of buying this: http://printrbot.com/shop/simple-metal-kit/ Model: 1403 Build Volume: 6″ x 6″ x 6″ / 150mm x 150mm x 150mm / 216 cubic inches Print Resolution: 100 Microns Print Speed: 80mm/sec max recommended Filament: 1.75mm PLA (sample included) I have never used or bought...