Are there any really good resources on modelling with differential equations?

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Discussion Overview

The discussion revolves around the teaching of differential equations, specifically focusing on resources for modeling with differential equations. Participants express a desire for impactful, real-world applications rather than artificial examples, and some mention the inclusion of historical context in the teaching materials.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • One participant seeks resources that effectively motivate learners through real applications of differential equations, avoiding artificial engineering examples.
  • Examples of applications mentioned include the charging and discharging of capacitors, chemical kinetics, radioactive decay, and heat transport.
  • Another participant references the Lotka-Volterra equations as a standard example of a non-trivial model that can be visually represented.
  • There is a suggestion that modeling is often synonymous with simulation, emphasizing real-world applications solved numerically.
  • Concerns are raised about the necessity of subject matter knowledge to build effective models, particularly in complex fields like climate science.
  • Some participants express frustration with the integration of numerical schemes in core differential equations courses, viewing it as a diversion from essential theoretical content.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the definition of modeling, with differing views on its relationship to simulation and the necessary depth of subject matter knowledge required for effective modeling. The discussion remains unresolved regarding the best approach to teaching modeling with differential equations.

Contextual Notes

Participants highlight limitations in the current teaching practices, including the potential disconnect between modeling and the necessary theoretical background, as well as the challenge of deriving models in complex systems.

matqkks
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I will have to teach a first course in differential equations. A good motivator might be to promulgate modelling with differential equations but I have seen some teachers have made polemic against modelling. Are there any really good resources on modelling with differential equations? I want something which will have an impact and motivate the learner. I am not really looking for artificial engineering examples but some bona fide real applications.
Also would like to bring in some history of differential equations.
 
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matqkks said:
I will have to teach a first course in differential equations. A good motivator might be to promulgate modelling with differential equations but I have seen some teachers have made polemic against modelling. Are there any really good resources on modelling with differential equations? I want something which will have an impact and motivate the learner. I am not really looking for artificial engineering examples but some bona fide real applications.
Also would like to bring in some history of differential equations.
Charging and discharging of a capacitor comes to mind.
Also chemical kinetics and radioactive decay.

See also https://www.researchgate.net/publication/333479286_Differential_equations_for_thermal_processes
for examples involving heat transport and gas pressure.
 
What do you mean by modeling?

In my experience, modeling is synonymous with simulation, and was always real world applications, solved numerically.

This goes way beyond simple analytically tractible scenarios like tank concentration etc.
 
Outside of modeling trivial systems, it usually requires a lot of subject matter knowledge to actually build-up a good model. For example, to generate a climate model, i.e., identifying the right variables and putting them in the right relationship to each other, would require subject matter knowledge in climate science beyond the student (and probably the lecturer). Common practice in a course on differential equations is probably to give a few examples of differential equations which model some system. Deriving those models is really the business of another field.

I don't interpret modeling to be synonymous with simulation. I was always annoyed with teachers who added numerical schemes into core courses. Felt like a waste of my time and their expertise.
 

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