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manual translation - Jul 29 at 11:33AM
Gabriel Fontinele
10 Posts

Hi Sir Douglas Brown, I'm Brazilian and I'm really enjoying your software. As a way to clear some doubts, I went to the help tab. When I opened it, I realized that the manual was only available in English. In order to improve my understanding, I translated the whole manual into Portuguese and would like to know if you would like to make it available in your software.


Replies to manual translation

Re: manual translation - Jul 30 9:27AM
Douglas Brown Avatar
Douglas Brown
213 Posts

Hello Gabriel,

Yes, I would like to post your newly translated Portuguese Help on the Tracker web site.  Please send it to me directly at dobrown@cabrillo.edu.

Thank you for your support of Tracker!

Doug



manual translation - May 28 at 5:38PM
Gabriel Fontinele
10 Posts

Hi Sir Douglas Brown, I'm Brazilian and I'm really enjoying your software. As a way to clear some doubts, I went to the help tab. When I opened it, I realized that the manual was only available in English. In order to improve my understanding, I translated the whole manual into Portuguese and would like to know if you would like to make it available in your software.


Replies to manual translation

Re: manual translation - May 29 3:57AM
Douglas Brown Avatar
Douglas Brown
213 Posts

Hi Gabriel, That's wonderful that you translated the Tracker help and yes, of course, I would very much like to make it available to others. You have a very active community of Tracker users in Brazil and a number of years ago some others translated the help into Portuguese, you can see it here: http://physlets.org/tracker/tracker_help_pt_BR.pdf (there is a link on the Tracker home page if you look for it on the left side).

However, it is certainly quite a bit out of date at this point so your newer translation is very welcome.  Unfortunately, I am traveling for the next couple months and won't be able to post your new one until July, but if you would like to send it to me directly at dobrown@cabrillo.edu I will make sure to do it when I get home.

Thank you for your dedication and valuable support of Tracker!

Best regards, Doug

> Hi Douglas, I'm Brazilian and I'm really
> enjoying your software. As a way to clear some doubts,
> I went to the help tab. When I opened it, I realized
> that the manual was only available in English. In
> order to improve my understanding, I translated the
> whole manual into Portuguese and would like to know
> if you would like to make it available in your software.



Bounce algorithm - May 28 at 10:45AM
Gabriel Fontinele
10 Posts

Even using the bounce algorithm, I can not find the initial velocity at time 0, could it help me?


Replies to Bounce algorithm

Re: Bounce algorithm - May 29 4:00AM
Douglas Brown Avatar
Douglas Brown
213 Posts

It is impossible to get a good estimate of the velocity at the very first position using the algorithms in Tracker. Your best bet is to create a particle model and adjust the initial conditions to get a good fit to your data, then find the initial velocity of the model.



Algorithms - May 27 at 6:48PM
Gabriel Fontinele
10 Posts

could you send me some document that better explains the two speed algorithms that the software uses ?


Replies to Algorithms

Re: Algorithms - May 28 3:58AM
Douglas Brown Avatar
Douglas Brown
213 Posts

For the finite difference algorithm, the instantaneous velocity at a particular step is assumed to be the average velocity between the previous and following steps. For the bounce algorithm see http:gasstationwithoutpumps.wordpress.com/2011/11/08/tracker-video-analysis-tool-fixes/

> could you send me some document that better explains
> the two speed algorithms that the software uses ?



initial velocity - May 24 at 2:13PM
Gabriel Fontinele
10 Posts

To find the initial velocity of an object in parabolic motion more accurately should I use the bounce detection algorithm?


Replies to initial velocity

Re: initial velocity - May 27 2:31PM
Douglas Brown Avatar
Douglas Brown
213 Posts

Hard to say, it depends too much on the actual data. I recommend you try the bounce algorithm, then see how well a dynamic model particle with that initial velocity matches the video motion.  Doug


> Re: initial velocity
>
> To find the initial velocity of an object in parabolic
> motion more accurately should I use the bounce detection
> algorithm?



Re: initial velocity - May 28 3:33AM
Douglas Brown Avatar
Douglas Brown
213 Posts

Actually, if a "bounce" never occurs, there is no reason to use the bounce detection algorithm.


> Re: initial velocity
>
> To find the initial velocity of an object in parabolic
> motion more accurately should I use the bounce detection
> algorithm?



Movement of a rocket - May 16 at 9:47AM
Gabriel Fontinele
10 Posts

I want to do the analysis of the movement of a rocket of recyclable material, however, with the camera that I use, I can not capture the complete trajectory of the rocket. From some initial data and the mass of the rocket, can the Tracker complete the inclined trajectory of the rocket? If so, could anyone tell me how I do it.


Replies to Movement of a rocket

Re: Movement of a rocket - May 16 10:17AM
Douglas Brown Avatar
Douglas Brown
213 Posts

It should be possible to complete the trajectory using a dynamic particle model if you know the initial velocity and the expressions for the forces that act on it. Check out Dynamic Particles in help.  Doug

> Re: Movement of a rocket
>
> I want to do the analysis of the movement of a rocket
> of recyclable material, however, with the camera that
> I use, I can not capture the complete trajectory of
> the rocket. From some initial data and the mass of
> the rocket, can the Tracker complete the inclined
> trajectory of the rocket? If so, could anyone tell
> me how I do it.



Re: Re: Movement of a rocket - May 16 10:39AM
Gabriel Fontinele
10 Posts

Where do I find this dynamic particle topic? In the help tab within the program itself?



Re: Re: Re: Movement of a rocket - May 16 2:21PM
Douglas Brown Avatar
Douglas Brown
213 Posts

Yes, open Tracker and choose Help|Tracker Help.  About 1/2 way down the list is Particle Models--see that. Or just search Help for dynamic particle. The search function is quite good!  Doug


> Where do I find this dynamic particle topic? In the help tab within the program itself?



Re: Re: Re: Re: Movement of a rocket - May 16 2:48PM
Gabriel Fontinele
10 Posts

Would it be too much to ask if you made a video on your Youtube channel and explained my question better?



Re: Movement of a rocket - May 20 4:50AM
Douglas Brown Avatar
Douglas Brown
213 Posts

I think you'll find some existing tutorial on this if you search YouTube. Also, there are many examples of particle models in Tracker's Digital Library Browser. Click the 3rd button on the toolbar to open the DL browser, then choose Collections|ComPADRE Digital Library|Tracker OSP Collection, then search in the DL browser for "model".


> Would it be too much to ask if you made a video on
> your Youtube channel and explained my question better?



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