Recent content by bolly

Dear Community, after searching the web I found this https://rosettacode.org/wiki/Animate_a_pendulum#C.23 and adapted their method to numerically integrate an ODE - just for the case someone else needs some working code - here the simple solver: public void PerformProcessStep(double...

Dear Community, I am trying to implement the inverted pendulum cart simulation. To do so I’ve used the equation system 5 published here http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.619.551&rep=rep1&type=pdf I've solved the equation by left hand multiplication with the inverse which...

Dear Community, after investigating the Kalman filter in more detail I've found that it can handle dt jitter if the sampling rate is set high compared with the settling time of the filter since the filter only yields good results after a settling time of approx. 20 times higher than the raw...

Dear Community, I want to use a Kalman- filter approach to calculate inclination angles (pitch and roll) obtained from accelerometer- and gyroscope- raw data. However the problem is that my sampling interval dt is not constant – it has a significant jitter instead. To investigate whether the...

Dear Community, after try- and error-ing a while I finally found a suitable set of parameters which define the most fascinating manifestation of the GrayScott model: The self replicating spots- simulation. However since it takes a lot of calculation this approach is not well suited for my...

Dear Community, I was trying to reproduce the 2D GrayScott model given either here: http://blogs.mathworks.com/graphics/2015/03/16/how-the-tiger-got-its-stripes/ or here: http://www.joakimlinde.se/java/ReactionDiffusion/index.php?size=0 The reason was to create a nice screen-saver (so I am...

@pumila There is also an observer who is actually moving the object. Therefore the distance between the observer and the object changes which is from my point of view different from a situation that describes just a single object that can exists as a logical “0” or “1”. If we define the...

-----< So the if initial B position is 0, and the final B position is a 1, then the original description has A change the information from a 0 to a 1 without a a net change in energy - and you expected one. Would this be what you are saying? >---- @ Simon, yes exactly this is what I have...

-->>We could indeed use a logic zero as the initial position and a logic one as the alternate position. We could apply energy to change it into logic one, and absorb it back to make a logic zero again.<<-- @pumila If we consider an adiabatic space (e.g. 3d) then the energy you are speaking...

@pumila. Thank you – I gas you right. The only issue I have with this is that the information regarding the alignment of the objects (observer and object) has changed without energy consumption. In general this would mean that information can be generated or changed without energy...

@pumila Thank you very much – now we conclude: The undergrad textbook statement that inside a frictionless 1d space a shift of an object with a defined mass consumes no energy is necessarily wrong. Because if the object is moved to another position to rest there forever then mechanical...

@pumila I was thinking that the process describes an isentropic compression or expansion because the distance between the objects changes. According to the carnot process an isentropic compression causes the temperature to increase and vice versa. I hope this is correct so far. Best...

@pumilla yes this is also the statement given in the textbook I mentioned before - however since I am not the expert in thermodynamics I still have a problem to basically accept this axiom. If we would consider an observer „a“ and e.g. 12 objects which are non randomly moved by the observer...

Hi Simon, maybe it is not so important, which mechanism actually is causing the process to work – for me it is more important whether the information, that starts the process can influences the entropy and temperature or not. The process has no practical sense – it’s just theoretically to...

Hello Bridge & Mason, Thank you very much for your responses. Regarding Bridges hint on the properties of the space: The properties of the space can be considered as following: - one dimensional - adiabatic (no energy can go in and no energy leaves) - the space is containing two objects...