danielemateriale
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Reply #30 on: June 29, 2013, 10:16:54 pm » posted from:MILANO,LOMBARDIA,ITALY |
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 sorry professor I found a possible error in the program. if I set B = 0 to verify that the speed is correct I find that scale of wall 600 if I put 1 (arbitrary units) = 100um i have that 10 km / s are 1 km / s if I put instead 1 (arbitrary units) = 1000um I find that 10Km / s are 10Km / s but if I calculate the radius of curvature with any value of sigma B and I find that 1 (arbitrary units) = 100um where is the error, maybe in the time?  i need your help thanks i'm sure (maybe!!!  ) that the time si ten times more big of normal 1 arbitrary unit =100um yet if you put time divided by (time/10) e.g. default values but B=0 traiectory linear deltax=1.01 arbitrary units, time=5.05us 1 arbitray units =100um if you choose time 5us you get 20m/s, not 0,2Km/s if you choose time 5us/10 get 200m/s, real 0.2Km/s default values B=1T if you calculate the diametrer of traiectory you find 1=100um as we told in the past addition to the time that must be divided by 10 should improve two parameters. 1. at any scale, the cursor speed should not exceed 100Km/s are not relistic higher speed. 2. the time step, at any scale, must not exceed 2us at higher values the simulation is very bad thanks
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« Last Edit: June 30, 2013, 12:05:20 am by danielemateriale »
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danielemateriale
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Reply #31 on: June 30, 2013, 03:02:56 am » posted from:MILANO,LOMBARDIA,ITALY |
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 please also you could put a space where you can numerically enter the angle of the velocity vector (in short, choose the direction) using a numerical value please put in the video of the programm the (down and right) the written 1=100um is much important for the user and show with a figure the direction of B. thanks
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« Last Edit: June 30, 2013, 03:10:20 am by danielemateriale »
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Fu-Kwun Hwang
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Reply #32 on: June 30, 2013, 08:12:05 am » posted from:,,Satellite Provider |
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 The time step and frame rate was not set correctly. It is done. It will be better if you can provide a jpg/gif file which show direction for B,x,y (lower left corner) Then, I will replace it. Click the eye (image) to display the simulation  Embed a running copy of this simulation Embed a running copy link(show simulation in a popuped window) Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site listPress the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
- Please feel free to post your ideas about how to use the simulation for better teaching and learning.
- Post questions to be asked to help students to think, to explore.
- Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!
 
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danielemateriale
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Reply #33 on: June 30, 2013, 02:49:49 pm » posted from:MILANO,LOMBARDIA,ITALY |
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 thanks so much for the improve the simulation. i have attach a gif file for the axis.
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Fu-Kwun Hwang
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Reply #34 on: June 30, 2013, 03:08:39 pm » posted from:,,Satellite Provider |
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 It is updated again (in the previous message). Your image file is a large one so it is reduced in the simulation. The X,Y,B might not be so clear.Is the size OK? It will be better if the original image file is a small size. Or give me a image with the exact size to fit the simulation will be perfect.
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danielemateriale
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Reply #35 on: June 30, 2013, 03:08:59 pm » posted from:MILANO,LOMBARDIA,ITALY |
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 excuse professor but the problem of time persists eg default values but B = 0 in the latest version of the program: deltax = 1.35 units, deltatime = 6.784us if we have 1 = 100um we have 135um and divided by deltatime you get 20m / s instead the speed that is correct, and set to 200m / s so the time must be divided by 10 to a correct result thanks
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danielemateriale
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Reply #36 on: June 30, 2013, 03:19:11 pm » posted from:MILANO,LOMBARDIA,ITALY |
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 this is a another gif. if you don't like tell me what you need 
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danielemateriale
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Reply #37 on: June 30, 2013, 03:26:17 pm » posted from:MILANO,LOMBARDIA,ITALY |
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 there are other attachs
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Fu-Kwun Hwang
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Reply #38 on: June 30, 2013, 03:46:10 pm » posted from:,,Satellite Provider |
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 The simulation has been updated with latest image file. The mistake was from the mis-interpretation. It is correct now. (The unit for time is not us but 0.1 us, the display has been changed). Actually, the unit used in the simulation is v(m/s), m(kg), r(m), B(T), q (1.6 C) The default for the simulation is m=1kg, v=0.2m/s, B=1 T, q=1.6C From  However, you would like to change the interpretation. m=1*10^{-26}kg, v=0.2 km/s, B=1T, 1=1.6*10^{-19}C So  m That is why we call the 1 unit =100 um. Because the unit for space become 100um, the unit for speed become km/s So the time step is  s =0.1us It should work fine now.
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danielemateriale
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Reply #39 on: June 30, 2013, 04:07:51 pm » posted from:MILANO,LOMBARDIA,ITALY |
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 ok you are right.
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« Last Edit: June 30, 2013, 04:36:15 pm by danielemateriale »
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danielemateriale
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Reply #40 on: June 30, 2013, 04:37:04 pm » posted from:MILANO,LOMBARDIA,ITALY |
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 thanks now the programma work very well.
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danielemateriale
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Reply #41 on: June 30, 2013, 05:00:50 pm » posted from:MILANO,LOMBARDIA,ITALY |
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 professor thanks for your help. the program is finished. I thank you now for I can not do nothing but offer her my services as I said before I am able to: - Use photoshop cs3 - Use autodesk inventor professional . designs for mechanics . jewelry . laser cutting . etc ... - Use programs for the calculation of structural mecchanic parts . beams . bolts . toothed wheels . etc ... - Use program for simulation of magnetic fields in 2d PERMAG - Use simple programs for the simulation of thermal exchange in 2d now and in the future in 3d send me a mail (ony for professor FU-Kwung Hwang) whit your request and if i can i'll do it for free.  We can became friend on facebook i have send you a request as Anto***** Daniele 
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« Last Edit: June 30, 2013, 05:08:32 pm by danielemateriale »
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Fu-Kwun Hwang
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Reply #42 on: June 30, 2013, 05:57:39 pm » posted from:,,Satellite Provider |
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 The final version is uploaded again for easy access. Click the eye (image) to display the simulation  Embed a running copy of this simulation Embed a running copy link(show simulation in a popuped window) Full screen applet or Problem viewing java?Add http://www.phy.ntnu.edu.tw/ to exception site listPress the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
- Please feel free to post your ideas about how to use the simulation for better teaching and learning.
- Post questions to be asked to help students to think, to explore.
- Upload worksheets as attached files to share with more users.
Let's work together. We can help more users understand physics conceptually and enjoy the fun of learning physics!
  You are welcomed. I only hope the final simulation is what you really need. Are you going to use the simulation for teaching? It take time to fully understand what you really want. And I also learn something during the process. Regards! 
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danielemateriale
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Reply #43 on: June 30, 2013, 06:23:30 pm » posted from:MILANO,LOMBARDIA,ITALY |
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 not for teaching, other reason. thanks for have accept my request on facebook  Do you like inventions? i like very much, from when i was a child, and I delight to do inventions in mechanical. I needed this simulation to see if my idea was valid or not. it's valid!!! thanks so much professor and if you need something in the previuos my post, as said my god, you only have to ask and you will be given
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Fu-Kwun Hwang
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Reply #44 on: June 30, 2013, 07:09:59 pm » posted from:,,Satellite Provider |
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 I hope your ideas can be realized soon! 
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danielemateriale
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Reply #45 on: June 30, 2013, 10:26:12 pm » posted from:MILANO,LOMBARDIA,ITALY |
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 thanks 
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