Recent content by tomallan

Hi, i have a set of definition for a triangle shape: -3/4<x<3/4 -x/sqrt(3) + sqrt(3)/4 < y < x/sqrt(3) +sqrt(3)/4 The centroid of this triangle is at 0,0 i want to rotate this triangle by a certain degree from the centroid but i am not sure how, because if i just multiply it by cos or sin...

Hi, i am wondering how do you calculate the minimum film thickness between two plates, one smooth surface and another surface with a square microasperity. i am just very confused as to how do you determine the film thickness in between them. I have attached a paper which has a graph on...

Hi, i am trying to model a triangle in a square cell based on its dimension. However, i have some problem with parts of the code, i think it might be the logic behind my programming or over definition with the code itself. i have attached the code. the problem lies with the second half of...

Hi, I am wondering as to how to define the boundary condition for a shape in a unit cell. Just imagine that the shape is the hole for the unit cell. Hence, for a constant thickness on the untextured boundary, thickness is, let's say C, then for the circle, it's C+depth. For example for...

hello. I have a MATLAB skeleton provided because i want to model a distribution with a circular geometry. all in all, i want the 3d graph of the code to be some type of cylinder. This is the code: % flat step condition for ii=1:nHi, for jj=1:nHj, if (X(ii)/R_P)<1 &...

hello. thanks for viewing my post. I want to know if there is a way to identify an equivalent force if I transfer the original force to a new location. is that possible? ill give an example. position of original force ----------(known distance)--------------------- desired new position of force...

it is possible to connect two hydraulic jacks together? it is possible to connect two hydraulic jacks together? i want to lift an inclined board using two hydraulic jacks at both ends of the board. is there a way that i can connect two hydraulic jacks together so that when i pump one of the...

it is possible to connect two hydraulic jacks together? it is possible to connect two hydraulic jacks together? i want to lift an inclined board using two hydraulic jacks at both ends of the board. is there a way that i can connect two hydraulic jacks together so that when i pump one of the...

it is possible to connect two hydraulic jacks together? i want to lift an inclined board using two hydraulic jacks at both ends of the board. is there a way that i can connect two hydraulic jacks together so that when i pump one of the jacks, the other is also being pumped. Any ideas how to lift...

any ideas please?

the ratchet method is not allowed. the mechanical device should be autonomus. Its like when i drop a payload onto it, it should automatically do the mechanical function. I was thinking about using pressurised air..

the robot has to be fully automated. ouyr teachers told us we can use the adruino uno stuff. i had also look at videos on how to make robot on internet. well for the device turning, the robot has obtacles to avoid so i think its good if i can calculate the distance traveled and then program it...

i have no background of building robots. i am only on year 12... i have limited knowledge about circuits and everything.

hello. I want to know the instructions of how o make a robot but make it turn at several intervals to left and right,

its not possible. the required tether is a rope.. any ideas please.. I am very desperate