## Blog

## Download Eircode Database

## emails

## Screencasting

So, this one time I forgot to turn the mic on during a class I was recoding, and so, no sound. And I thought afterwards, heck, I should write a little script that does all the things I need to do to record a lesson. So this script will turn the mic on, open mypaint, resize the screen, start recording, convert the output and stitch it to me “intro/exit” video byte. All I need to do is run this script and after is a go and the output it saved into my video folder and ready for uploading to youtube. Cool :)

## libdvdcss

## Extensive Reading - playing the numbers game

## Pluto

As you know, I’m sure, Pluto is no longer a planet :( The reason being that the current definition of a planet would not allow Pluto to be included in the planet club. The criteria Pluto lacks is “Clearing the neighbourhood”.

## LC Applied Maths 2015

Time = 1 hour, 45 minutes

Q1, this took me 13 minutes to do. The answer for part (a) was 57 m and the answer for part (bi) was 3.5 seconds and (bii) was 48.857 m. I'll give this 5/5 :)

## Maths Paper Two 2015

Question 1:

A run-of-the-mill two die question. Not very interesting. Good one to get the ball rolling.

...

## Maths Paper One 2015

Here is my review of the Exam:

Question 1: Oliver Murphy would be pleased :) it is a question very similar to one in his book.

…

## Edco Sample Questions

I think there is a small mistake/slip/thing on page 131 and page 125 of Edco’s LC Higher Project Maths Papers (namely the sample papers). I’ve noticed it the last two days when two different students needed help with the questions. Although the mistake (IMHO) is not the reason for the their difficulty.

## Good Luck!

Good Luck to all my students that are starting their Leaving Cert today :)

## Product or Chain Rule

## Harvey Norman's New Website

Here is Harvey Norman’s new website, featuring annoying rte ads :P

## Wait, that isn't New to Project Maths?

- Probability Distributions
- Normal Distributions
- Normal Distribution as an approximation to the Binomial Distribution
- Sampling Theory
- Confidence Interval
- Hypothesis Testing

## Dublin Bus

## RIP John Nash 1928-2015

RIP John Nash 1928-2015

## Ethical Hacking

When you hear hacking, what do you think? Most people imagine something seen in films… bad guys hacking into banks, stealing money, things like this. But this is not always the case. Sometimes it has a good purpose.

## Referendum Results

The results are in for the Irish 2015 Referendum. And I was wondering how the Venn Diagram might look for these results. I will have to assume that the probability of voting Yes on the Marriage Amendment is the same as that for the Presidential Amendment. It is impossible to know from simple counting if they are independent. It is likely they are not… one could form a better estimate from using some survey/questionnaire data. In any event, here are the results in Venn Diagram form:

## Hypothesis Testing

The new Leaving Cert Syllabus (Project Maths) has Hypothesis testing on it as a prominent part of the course, well, at least enough so that two of my students I help in grinds this week said they find it difficult. And it is difficult concept.

I was noticing that some books and notes use the Margin of Error formula $ME = \frac{1}{\sqrt{n}}$ and some places use the Standard Error $SE = \sqrt{\frac{\left(p\right)\left(1-p\right)}{n}}$ when calculating the Confidence Interval (so that one could test the Hypothesis) in the case of Binomial Trials. Is there a difference? Well there is.

## Writer Monkey

We all know the story about the monkeys at the type writer. That, if given enough time the monkey will bash out the works of Shakespeare. In fact this is known as “The Infinite Monkey Theorem”. The Bio teacher I work with at school was wondering how many times his name would appear before my name would appear. His name being “Colm” and mine “Stephen”. And how long it would take before his name would appear…. Let’s work it out.

## Two Cars Colliding

I was asked by an Applied Maths student of mine to explain an interesting Physics problem he came across online. Image two identical cars, one is at rest and the other is heading towards the stationary car at 10 m/s. When they meet there will be a small crash. Now the interesting part.

Imagine the cars are moving at 60 m/s and 50 m/s now. And you are above them in a helicopter moving at 50 m/s. In this reference frame the cars are still moving towards each other at 10 m/s. But when they meet and crash the accident is much worse. Why is this?

## Top Three Study Tips from a Maths Teacher

My top three study tips for Mathematics. I hope it helps someone out there!

## Python, Google and mpg123

## Are women in Ireland almost three times as likely to die in pregnancy and childbirth as those in Norway?

Last Friday a colleague of mine was talking to me about a recent news piece they were listening to on Today fm. The radio station was reporting on the results from recent research conducted by the charity “Save The Children”. The station was reporting that according to the charity “women in Ireland are almost three times as likely to die in pregnancy and childbirth as those in Norway”. An amazing claim. Is it true though?

## Hello World

This is my first blog post. Its only purpose, to make sure everything is working okay with my new blog :) More blogging to follow…