COMP6021 Class 02.4 - Zombies, Semaphore & ASCII

We looked at some solutions for the traffic light zombie code and considered some advantages and disadvantages.

We looked at Braille, Semaphore, ASCII, DOS Code Pages, and extended-ASCII

Next up: Unicode

COMP6021 Class 02.3 - Negative Numbers

We played Binary Bingo, but the winner wasn't aware that he had won.

We looked at One's Complement and Two's Complement representations of integers. I explained why they were better that sign & magnitude representations. We looked at using offset binary for awkward situations.  I briefly mentioned IEEE Floating Point, but we won't be going into that. 

We began our look at representing text. I outlined the problems facing Outpost 19 after an attack by the zombie hoard, and asked students to devise an efficient communication system for the traffic lights. 

COMP6021 Class 09 Representing Text

the one with the sailor

We completed our look at our post zombie apocalypse communication system and looked at some features of students' designs. We discussed some things to consider, and looked at Braille and Flag Semaphore

COMP6021 Class 08 Representing Text

the one with the zombies

We considered how to represent text using bits. I asked students to devise a text transmission system using traffic lights for use after the zombie apocalypse. I asked students to work in groups and email their solutions to me.

At the end of class I pointed out that someone has already devised a very similar system. But that it doesn't use lights. Quite the contrary in fact.

Outpost 19 Report day 256/Bad week/Surprised us at dawn day 253/ Lost 3/Lost Irish nerd/Told us morse code on stop lights inefficient/Can't decipher notes/know what 23x23=64 means?/OP19 out

COMP6021 Class 04

We devised a communication scheme for Outpost 17:


The remaining humans have split up into secure outposts. The solar powered lights on the end of town are controlled from inside the perimeter of Outpost 17, but can be seen from watch towers at the other outposts. This system has been used for months now to communicate between outposts using Morse code. Outpost 17 had a computing student from Cork until recently. He explained that Morse code made sense if you had only one light, but it was inefficient when you had more. But he didn't make it through the last attack and now he's either dead or un-dead.  We found his notes. But we don't know what he meant by 23 + 23 = 64. If we could communicate with the other outposts more quickly it would make a huge difference. Maybe you can figure out what he had in mind.