systemreboot – blog
fold and stream-fold pass arguments to proc in different orders
Mar 24, 2016
SRFI-1 fold and SRFI-41 stream-fold pass arguments to proc in different orders. Violating the principle of least astonishment, this comes as a rather inconvenient surprise to the programmer.
Tags: lisp, scheme, functionalprogramming, software
Self-hosting Mail – Hurdles
Jan 20, 2016
My troubles with self hosting a mail server. In the name of countering spam, mail has become such a quagmire of blacklisting, whitelisting, etc. – in other words – censorship. email is in danger of becoming gmail. email is such an elegant set of protocols with decentralization built into its heart. We must not let it become a victim to centralization.
Tags: selfhosting, internet
Quiz Buzzer v2
Nov 20, 2014
After being stuck in development hell for a few years now, version 2 of the Quiz Buzzer is at last here. The final iteration of polishing/testing/reengineering has been done, and the buzzer is finally complete. The new buzzer is one single all in one board with the LED seven segment display, the display driver circuitry and the controller circuitry all integrated into one monolithic PCB. Finally, from prototype to usable product…
Tags: electronics, project
The Quadrifilar Helix and APT Yet Again!
Jul 6, 2014
Manjunath and I have been meaning to do something these hols - you know, just something to feel a sense of satisfaction before diving into regular coursework and stuff next semester. So, we finally decided to attempt a quadrifilar helix for APT reception, and here we are!
Tags: radio, satellite, rtlsdr, sdr, weather, antenna, project
IISc Mess Subsidy Protests
Apr 11, 2014
On Thursday, April 10, the students of IISc protested the administration's proposal to cancel the mess subsidy. I myself participated and was witness to the proceedings. Here is a short account of the events of the day and a comparison of various newspaper reports on the incident.
APT Again!
Jul 31, 2013
It is quite possible for someone to ask why, in the age of the Internet and the Television, and realtime weather reports, we need APT images. But, you will never know the joy of building your own equipment, and receiving your very own satellite images, until you have actually done it!
Like Frogs in a Well
May 23, 2013
Simple visualizations (such as the one shown in the figure) of this curvature, typically appeal to a 2D fabric of space curved into a third dimension by the presence of a mass such as the earth. This curvature creates a three dimensional "well" into which other masses fall, thus resulting in what we perceive as gravity.
Over the Arabian Sea
Feb 26, 2013
…here at last, we have these spectacular images - images that rained down from the sky! It's true that they are still imperfect, and rather noisy (a situation that I intend to fix soon). But, anyway, here they be recorded, before the miracle of the moment passes away…
Tags: radio, satellite, weather, electronics, project
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