HijanosProject

Pulleys Program

Tuesday, 26 August 2008 12:02 Oliver Hijano Cubelos

Pulleys Program:

This program simulates the mechanic movement of two pulleys connected with a spring(between them) and with two other springs (to the walls):

This program is supposed to simulate the real mechanic movement (not in real time) of two pulleys connected between the with a spring and also connected to the walls with two other springs. The user can set up all the variables which determine the movement. This program also draws the kinetic and potential energies graphics, and you can clearly difference each pulley energy since each graphic is drawn using a specific colour. Moreover, you can set the two normal modes of the system (which are demostrated in the .pdf file), and you can slow down or accelerate the motion speed (or even pause the movemeny), so you can study perfectly the mechanic movement.

Last Updated ( Thursday, 28 August 2008 06:08 ) Read more...

Masses and springs

Wednesday, 27 August 2008 11:59 Eliot Hijano Cubelos

Lagrange Equation Program: Three masses and three springs

This application simulates a physical system that consists on three masses assembled to three circular wharves. The masses are supposed to not to be affected by the force of gravity and they can only move in one direction (constant radius but changeable angle). The first mass (mA) is assembled to the first spring (kA), and to the second spring (kB). This one is connected to the second mass (mB) which is assemble to the third spring (kC) that connects with the third mass (mC).

The application is focused on the action between the springs and the masses so the collisions among the three masses are not considered.

Last Updated ( Thursday, 28 August 2008 06:03 ) Read more...

Pendulums Program

Tuesday, 26 August 2008 12:02 Oliver Hijano Cubelos

Pendulums Program:

This program simulates the mechanic movement of two pendulums connected with a spring:

In this program the user can set up all the variables needed to determine the pendulums movement. The program is supposed (not in real time, though) to show the real movements two pendulums should have if we "copy" the initial conditions, and it draws the potential and kinetic energies. Moreover, the user can accelerate and slow down the speed so he/she can see specific interactions between both pendulums, as well as pause them or stablish the two "normal modes" (in which the pendulums have the same movement, or the reverse one).

Last Updated ( Thursday, 28 August 2008 06:09 ) Read more...

Rubik Cube 2x2 java solver

Monday, 25 August 2008 18:34 Eliot Hijano Cubelos

Rubik Cube 2x2 Java Package

We have programmed a java package that is able to solve the 2x2x2 rubik cube using two different methods. The first one is the 'force method' that can solve the cube if it has been scrambled in 3-4-5 movements but it is useless if the cube is completely scrambled. The 'classical method' is the best one due to the fact that it can solve the cube in less than one second using almost the same amount of movements as a normal person would use. Moreover, the package has more methods that allow the user to get and set information of the cube as well as to get a current image of the unfolded cube.
You can find more information visiting SourceForge: Sourceforge.net/projects/rubikcube2x2jav/

Last Updated ( Wednesday, 27 August 2008 15:32 ) Read more...

Lens Maker´s Equation, dioptres and mirrors.

Saturday, 23 August 2008 15:50 Eliot Hijano Cubelos

Lens Maker

A lens is an optical device with perfect or approximate axial symmetry which transmits and refracts light, converging or diverging the beam. There is an equation that determines the situation and height of an image seen through a lens. It is called the lenmaker´s equation:

More information about lenses can be found at:
http://en.wikipedia.org/wiki/Lens_(optics)

Last Updated ( Tuesday, 26 August 2008 17:47 ) Read more...

Snell's law

Friday, 15 August 2008 08:56 Oliver Hijano Cubelos

Snell's law

When an incidental beam reaches an interface between two media, it may produce a reflexion and/or a refraction. Snell's law determines the relationship between incidence and refraction angles. ni and nr are the indices of refraction.

If (ni/nr)·sin(incidenceAngle)>1, then there is no refraction. If (ni/nr)·sin(incidenceAngle)=1, then the incidenceAngle is the angle limit. The refraction should be at 90º.