ejss

27 January

Simulation on the effect of vaccination on the spread of Covid-19

Seng Kwang Tan Blog 0 Comments

My ex-colleague Lawrence did a simplified simulation on how vaccination can work to slow down the spread of Covid-19. It shows a clear correlation between rate of transmission and percentage vaccinated. Of course, experts recommend 80% vaccination rate but every bit counts as you can see from the simulation. I will be sure to receive mine when we get our turn.

It could also be useful for educating the public on the continued need for social distancing/masks despite having a sizeable population being vaccinated.

(Note: p = probability of spread upon contact, and you can use the dropdown menu to select different modes of safe management measures)
24 March

Collision Simulation

Seng Kwang Tan 03 Dynamics 0 Comments

I created this post here to bookmark some useful tools for use during my upcoming JC1 lectures on Dynamics.

This is a simulation for collisions that show the momenta before and after collisions. It requires registration after one visit.

A better choice for now could be the EJSS version (created by my ex-colleague Lawrence) which is far more detailed.

I had wanted to build one using GeoGebra and in fact, was halfway through it, but the Covid-19 pandemic has created other areas of work that now take priority.

26 February

Simulation: Faraday’s Law of Induction

Seng Kwang Tan 18 Electromagnetic Induction, Simulations 1 Comment

This simulation traces the flux linkage and corresponding emf generated by a rectangular coil rotating along an axis perpendicular to a uniform magnetic field. One is able to modify the angular frequency to see the effect on the frequency and peak emf generated.

Faraday’s law of electromagnetic induction

https://ejss.s3-ap-southeast-1.amazonaws.com/faradayslaw_Simulation.xhtml

01 February

Phase Difference Simulation

Seng Kwang Tan 10 Oscillations, 11 Wave Motion, Simulations 2 Comments

I created this simulation for use later this semester with my IP4 classes, to illustrate the concept of phase difference between two oscillating particles.

https://ejss.s3-ap-southeast-1.amazonaws.com/phasedifference_Simulation.xhtml

Update (26 August 2020): I have also created a GeoGebra app to demonstrate the same principle.

05 December

Simulation for Gravitational Field Strength and Potential

Seng Kwang Tan 07 Gravitation, Simulations 0 Comments

This simulation allows students to observe the variation of gravitational field strength and potential between two masses. Field strength is shown as vectors whereas potential is shown as scalar values on a plot. The resultant field strength and potential are shown in red.

https://ejss.s3.ap-southeast-1.amazonaws.com/gravitation_Simulation.xhtml