[mxplxxx (OP)]

That looks like the statement of a self professed rock star coder. It also looks like the words of someone with an over inflated ego.

IYHO. Your post is inflammatory and not based on fact. I mention I am a developer not a coder.  And I am at the top of my profession. Why should I not make this known and rejoice in the fact? I really applaud people who take pride in their achievements. I urge my coaching clients to develop HUGGs (Huge Unbelievably Great Goals) rather than develop false modesty which you seem to be advocating. Plus I have a smiley at the end of " assign it to a rock-star Software Developer with a physics bent (like me:))." which means I do not take the fact too seriously.

And calling me a grifter which has criminal connotations is totally uncalled for.

I am aware as a life coach that blame is rarely all one way. I encourage my clients during difficult conversations to map the contribution system:). I am a typical Aries person who tends to be very fortnight in their opinions. But I always mean well.

[jeffreyH]

You, who really don't have a good grasp on physics, would like to promote yourself as knowledgeable enough to be able to take on paid work developing simulation software.

Isn't that seeking to obtain employment under false pretences? You can argue all you want that you do have the knowledge, but your posting history tells a different story.

[mxplxxx (OP)]

ou, who really don't have a good grasp on physics, would like to promote yourself as knowledgeable enough to be able to take on paid work developing simulation software.

You are once again bordering on libel. You have no evidence for these inflammatory and untrue statements. I retired 10 years ago and have little need for money.

I have had a fascination with physics since my schooldays. I have a library that is chock a block full of physics books. Physics is far from an exact science. The fact that so many people view my posts would seem to indicate that my opinions are valued. Why should people value your opinions over mine just because you think they should?

[jeffreyH]

BTW Take note: Advertising and self promotion are against the forum rules.

[mxplxxx (OP)]

BTW Take note: Advertising and self promotion are against the forum rules.

Yet you continue to promote yourself as an expert in your field. And Advertising, what advertising? Come on give up on your inflammatory and vindictive posts.

[jeffreyH]

And I quote.
Actually I have my own simulation framework that I hope to foist on the computer profession soon. It is called 3dAbstractions and is based on Hierarchical Finite State Machines theory. 3d as in D for Display, D for Data and D for Datastore.
End quote.

That states quite plainly the name of your product. Maybe that is why you signed up, to get data to use in testing. That is a generous interpretation.

[jeffreyH]

One more quote
I have had a fascination with physics since my schooldays. I have a library that is chock a block full of physics books. Physics is far from an exact science. The fact that so many people view my posts would seem to indicate that my opinions are valued. Why should people value your opinions over mine just because you think they should?
End quote.

Firstly, if you have read so extensively on physics then why do you ask the questions you do in the way you do?

Secondly, my opinions on science should be taken as just that. There are professionals here who are a fantastic learning resource. It is a unique learning opportunity for anyone. The site podcasts are another excellent source of learning. That assumes that members are here to learn. That is not always the case. Some have ulterior motives.

Lastly, controversy is no indication of value. A lot of people slow down to rubber neck an RTA. That doesn't make the accident valuable. It just makes it a lot sadder.

[mxplxxx (OP)]

And I quote.
Actually I have my own simulation framework that I hope to foist on the computer profession soon. It is called 3dAbstractions and is based on Hierarchical Finite State Machines theory. 3d as in D for Display, D for Data and D for Datastore.
End quote.

That states quite plainly the name of your product. Maybe that is why you signed up, to get data to use in testing. That is a generous interpretation.

From Google.

foist
verb
impose an unwelcome or unnecessary person or thing on.

I said "foist the product on the physics community". I said nothing about selling it (which would likely be impossible if it needed foisting to bring it to people's attention:)). It is personal software. It is a hobby. You are consistently reading additional meaning into my posts where it does not exist.

[mxplxxx (OP)]

Firstly, if you have read so extensively on physics then why do you ask the questions you do in the way you do

I only ask questions that I need help on. I have no idea what you mean when you say "in the way you do". I rarely ask questions anyway in New Theories. Anyway, time to move on; I have wasted much time defending myself and it is seemingly a never-ending process. I seem to have many disturbing opinions on physics and maybe this is a good thing for physics.

[Bored chemist]

This is incorrect and probably libelous.

Said Mr

Impossible not hard,

Both these facts make me highly suspicious that the simulation is a furphy.

While we are at it, how do you square this circle?

And I am at the top of my profession.

I retired 10 years ago ...

[jeffreyH]

Start quote.
I would love to see the code behind this. Or even a description of what the code does. Given we don't actually know what happened at the time of the Big Bang, I am skeptical that such a simulation could exist.
End quote.

Maybe you would like some tips on how to code a simulation. Best interpretation.

Maybe you would like to plagiarise their code.

[jeffreyH]

You said your software is a hobby. Well post it to github, post a link to the repository, and we can review it to see if it is as good as you say.

[evan_au]

most simulations I am aware of are based on UML StateCharts which is a kind of software framework especially designed to implement software simulations

One of the languages I studied at uni was called SIMULA, a simulation language.
- SIMULA is a Discrete Event Simulation language which can model objects and events. It has similar ideas to the UML link that you posted
- And much of my workplace software experience has been in event-driven and message-passing Real-Time software which can be represented in RT-UML

But I think that you may have missed the object of your sentence
- My impression is that UML is intended to "simulate software". Software can be modelled as a discrete event system (and many obscure bugs happen when those discrete events are no longer atomic!)
- However, you are interpreting UML as "software to simulate physics", which is not the case
- A lot of physics is represented as differential equations which needs different tools than discrete event simulation
- Other types of physics uses matrix operations, which are not a natural data type in UML the way they are in FORTRAN (although overloading C++ operators could come close)

While there may be physics systems which could benefit from a UML-style tool, I think it would be a fairly narrow set.
I suggest that UML should be reserved for it's strength: simulating software systems.

See: https://en.wikipedia.org/wiki/Discrete-event_simulation
https://en.wikipedia.org/wiki/Continuous_simulation

[mxplxxx (OP)]

- A lot of physics is represented as differential equations which needs different tools than discrete event simulation
- Other types of physics uses matrix operations, which are not a natural data type in UML the way they are in FORTRAN (although overloading C++ operators could come close)

This is my whole point. Differential equations and matrix arithmetic were originally used to describe concepts in physical systems because computers were not available at the time. Why they have continued on being used now that good simulation software like UML exists is a bit of a mystery. A computer simulation deals naturally in concepts and murders a mathematical model for ease of understanding and has far more capabilities than available with mathematics alone.

[jeffreyH]

Not willing to post your code then. I wonder why that is. You were eager to have access to someone else's code though.

[mxplxxx (OP)]

- My impression is that UML is intended to "simulate software". Software can be modelled as a discrete event system (and many obscure bugs happen when those discrete events are no longer atomic!)

UML StateCharts can simulate anything that is object-oriented (see https://www.embedded.com/design/uml/4219602/UML-Statecharts )

See also http://scs.org/wp-content/uploads/2018/06/van-mierlo-_-edited.pdf

[mxplxxx (OP)]

Not willing to post your code then. I wonder why that is.

More jumping to conclusions. More aggression. More sarcasm. Who do you think you are? You don't "wonder why that is", you know deep down in your hard, unyielding heart, it is because it doesn't exist. Actually, I don't give even a tiny rats ass what you think (Friends 1994).

[jeffreyH]

- My impression is that UML is intended to "simulate software". Software can be modelled as a discrete event system (and many obscure bugs happen when those discrete events are no longer atomic!)

UML StateCharts can simulate anything that is object-oriented (see https://www.embedded.com/design/uml/4219602/UML-Statecharts )

So it is for embedded control systems then. The example given was traffic lights.

[jeffreyH]

So you are saying your software doesn't exist then. Pedalling vapourware?

[Bored chemist]

you know deep down in your hard, unyielding heart, it is because it doesn't exist.

That's almost certainly libelous.

Here's a question for you,
Imagine I got a copy of UML and unpicked how it works (as if I was reverse engineering it).
Do you think that, somewhere in the depths, I'd fine a routine that was doing matrix algebra or solving differential equations?

I'm certain I would.

So, what you are saying is "I don't use matrices- because my computer does that for me".

Why they have continued on being used now that good simulation software like UML exists is a bit of a mystery.

Because (in all conceivable probability) UML uses them anyway.