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A simple code to import and visualize COVID19 real-time data using COVID19Py python package


Reading time: 4 min 2 sec COVID19 has almost put a pause on our everyday life; quiet roads, vacant parks, closed theatres, silent supermarkets, and the list goes on. To resume our life back to normal, it is inevitable to develop meaningful and scalable medical and technological solutions asap. In general, medical solutions such as vaccinations and other popular treatments can help our immunity system … Continue reading A simple code to import and visualize COVID19 real-time data using COVID19Py python package

A simple tutorial on predicting the chance of a heart attack using Machine Learning algorithms


Reading time: 4 min 2 sec Can machines learn just like humans do? If that is possible, will that be a threat to humanity? You might have seen apocalypse-themed movies and shows such as Terminator series or Westworld wherein intelligent machines become sentient and eventually turn against humans. Will such scenarios ever become a reality in the future? No one knows for sure. Whether such … Continue reading A simple tutorial on predicting the chance of a heart attack using Machine Learning algorithms

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“Your reality is what you expect!” -How the brain manipulates our vision?


Reading time: 3 min 49 sec Before jumping into the details, have a look at the two examples below: The science behind vision: In this model, the brain creates its own reality irrespective of the signals sensed. This happens because of a small portion of the brain called thalamus that acts as a hub to transmit and receive signals from both visual cortex and eyes. The … Continue reading “Your reality is what you expect!” -How the brain manipulates our vision?

Building a realtime phase-space and timeseries plotter for a Simple Pendulum using Arduino Uno & Simulink


Reading time: 4 min 44 sec Note: This post is intended for educational purpose. It gives you some insights and details regarding the topic. The contents are structured to enable you to do this DIY project by yourself! These days, it’s pretty much straight forward to simulate physical systems in a computer. Running those governing equations in any high-level languages such as Python, Visual Basic, … Continue reading Building a realtime phase-space and timeseries plotter for a Simple Pendulum using Arduino Uno & Simulink

Finite and infinite conjugate objectives


Reading time: 1 min 2 sec An objective is nothing but a compound lens, like a normal lens, the only difference is they are much more potent in terms of numerical aperture, resolution and magnification. In microscopes, objectives are mainly used with two optical designs: finite or infinite conjugate designs. In a finite optical design, the light from a spot is focused into another spot … Continue reading Finite and infinite conjugate objectives

Taking Fourier plane out of an objective for angle-resolved measurements.


Reading time: 2 min 14 sec. We know that a simple lens is a Fourier transform engine, which does complicated ‘Fourier calculations’ of any object faster than any computer available today! An object placed at a distance d from the lens forms its Fourier image at the back focal length (f) of the lens. As we know, Fourier image is always formed at the focal … Continue reading Taking Fourier plane out of an objective for angle-resolved measurements.

How to screen a femtosecond laser pulse stream on an oscilloscope?


Reading time: 1 min 42 sec

It is quite possible to view the pulse stream of a femtosecond output on an oscilloscope screen, especially to measure the repetition rate of the laser. It is to be noted that, we cannot see the pulse shape of the laser beam as the response time (rise and fall time) of the photodiode (PD) is quite higher than the pulse width of the femtosecond laser.

Things to be noted:

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Time to be smart: ‘Fact’, ‘Law’, ‘Hypothesis’ and ‘Theory’ in Science.


Reading time: 2 min 57 sec I recently watched a youtube video where Dr Zakeer Naik says to a bright medical student that a ‘theory’ in science will only become ‘law’ after testing and verifying its correctness using scientific methods. I got shocked listening to this nonsense. Here is a man with the title ‘Dr’ (physician, I guess) who is supposed to educate himself at least with … Continue reading Time to be smart: ‘Fact’, ‘Law’, ‘Hypothesis’ and ‘Theory’ in Science.

On the uncertainty of explanations: Religion vs Science


  Reading time: 1 min 24 sec     Once my friend, who is a believer of a set of religious rules, said “I don’t believe in science because it says something now and it says something else later. It’s so uncertain.”   I replied “Hold on a second. So you believe in statements which never change? Good… And do you even bother to think … Continue reading On the uncertainty of explanations: Religion vs Science

An evolutionary disadvantage: Few thoughts


Reading time: 2 min 38 sec

   A group of scientists conducted an experiment on fishes to study how physical appearance (colouration) influence their evolution. Briefly speaking, they put the same number of males and females in two aquariums A and B (say, 500 females and 500 males in each container. Number doesn’t matter much). The container A has all coloured fishes, and container B has 500 coloured and 500 uncoloured (Have you ever seen guppy with no colour?) fishes. Then they allowed them for reproduction and continuously evaluated the number of coloured and uncoloured fingerlings (Fish offsprings) for several generations. What they found was this: Container A sustained the population almost the same, and the population in Container B got extinct. Continue reading “An evolutionary disadvantage: Few thoughts”