# systemreboot – blog

## Convolution and Polynomial Multiplication

*Mar 26, 2012*

"Convolution in the time domain is multiplication in the frequency domain" is an oft-quoted statement. But the exact relation between the two is seldom stressed adequately. Mathematically, convolution and polynomial multiplication are one and the same process, as I shall explain shortly.

## Quantitative Aptitude for the Electrical Engineer

*Mar 26, 2012*

This is based on my dissatisfaction with the messed up way time and work problems are handled in quantitative aptitude examination guides. They take a simple idea, threaten you with time constraints and leave you feeling broken and guilty because you couldn't solve them quickly enough.

Tags: math

## Throughput of Aloha Networks

*Mar 26, 2012*

A derivation of the mathematical expression for the throughput of an aloha network using the exponential and Poisson random distributions

Tags: math

## Why parabolic reflectors?

*Mar 26, 2012*

At school, we are taught that parallel rays incident on the mirror, after reflection, pass through the focus of the mirror, and that irrespective of the position of these parallel rays, the position of the focus does not change. But that is not quite true. It is just an approximation.

## A Free World

*Mar 24, 2012*

This is a newsletter we designed for a newsletter design contest conducted in our college on March 2010. The contest was called N'Vogue and it was conducted as part of Verve '10 by the ELS (English Literary Society) of our college.

Tags: project

## Lagrange Interpolation - Matlab / GNU Octave Code

*Mar 18, 2012*

This piece of code is a Matlab/GNU Octave function to perform Lagrange interpolation.