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Curiosity On Rails

Scientific explorations of a young enthusiast

void test();

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- March 22, 2017

test();

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Optimal server estimate with Markov chains

- January 09, 2019

I was learning about Markov chains while reading about Hidden Markov Models (HMMs), they are used in understanding and decoding the meaning behind speech. Working on system design and architecture concepts, I saw an analogy of this concept, for using them for finding an optimal number of servers for your micro-service. This post has been long overdue though, since July 16 to be precise, the day ' Amazon Prime-Day ' took place this year ; the post is inspired by that busy day for servers, where multiple customer requests hop from one server to another, sporadically sky-rocketing the read/write load on the them. For lucidity and ease of understanding, consider that there are only 5 categories and data for each category is in a separate server, and each server can serve \(100k\) customers. The most important problem for Amazon is optimizing the number of servers for each category. Let's say that through deep-learning algorithms and yada-yada we can predict the total numbe...

Wrapping my head around a 'wrap around' : Aliasing

- November 19, 2017

Digital images are formed by transforming illumination energy into a voltage by the combination of input electric power and sensor material which is responsive to the energy being detected. The output waveform/voltage is a continuous signal which is changed to a digitized form, by sampling. [1] When these images are rendered on computer screens an effect that is noticed oft-times especially in video-games is aliasing . The image on the left illustrates aliasing, it is a checkered texture that becomes irregularly shaped as the distance increases and the edges become jagged where the tiles are closer. So this question arises, what causes images/videos to be aliased when they are simply just multiple pixels on a screen? The answer is not as simple as I hoped it would be as the pith of its explanation lies deep in the roots of signal processing. Each image can be thought of as a 2D matrix of values for each R,G and B component of its colour, i.e, three 2D matric...

The noise inside your head

- January 19, 2021

Have you ever felt that your head was full and you couldn't think more? To my surprise, that was not just a metaphor, it was quite literally true! For an ever-growing, learning brain, and to keep in-taking information, there is a big price humans have to pay! Not delving into the biology of our brain, I'll try explaining things in a computer scientist friendly way; every-time our brain intakes new information/data, we make stronger synapses (connections) between nerve cells. The strength of these synapses determines how easily we can retrieve information from our brain, and consequently, some synapses become stronger/larger when we repeatedly intake the same information (thus when we want to memorize something, we find revision helpful for later retrieval.) In a single waking day, synapses continuously strengthen/enlarge as we absorb all kinds of experiences, but this process can't happen indefinitely as synapses reach a saturation point - hence 'our head becomes...