# Author Archives: Sean

## Delete large number of jobs with SGE

Sometimes I accidentally add lots of jobs to our SGE queue and want a quick way to delete them.

## Relationship between Car Insurance Price and Population Density

There was some discussion in my office today about the correlation between car insurance prices and where you live. The idea being that the prices are correlated with population density.

## Install G77 on Ubuntu >=14.04

In 2012 I wrote how to install G77 on Ubuntu >=9.04. However that approach no longer works (yet that particular blog posts gets lots of hits because of a link from stackoverflow). So here are some updated instructions which work … Continue reading

## How to Install the Edimax AC600 Wireless Driver for the Raspberry Pi

I use an Edimax AC600 series USB wireless device for my raspberry pi. Here is the easy way to install the driver for it.

## Number of Unique Song Choices on Desert Island Discs

Desert Island Discs celebrates its 75th birthday today, and today’s guest is David Beckham. Beckham will pick 8 song choices to take away with him on a desert island. What I wondered was, will all of his song choices have been … Continue reading

## Maths on a Mug #16

#mathsonamug pic.twitter.com/Rd0IAC9YHw — Sean Elvidge (@seanelvidge) November 17, 2016 Perhaps a “simple” #mathsonthemug this time. Simple, but very important. This is Bayes’ theorem: \[P(A|B) = \frac{P(B|A)P(A)}{P(B)}.\] This relates the probability of observing \(A\) given that \(B\) is true where \(A\) … Continue reading

## Dealing with WordPress Security Issues

Recently another WordPress site that I manage has had a lot of malware issues.

## Maths on a Mug #15

#mathsonamug #maths #newpoundcoin pic.twitter.com/lMQm5uOUyl — Sean Elvidge (@seanelvidge) November 4, 2016 Keeping with the theme of yesterdays blog post about the new pound coin and shapes of constant diameter here is a nice little result known as Barbier’s theorem. Simply, it … Continue reading

## New Pound Coin

Anyone who knows me / has been lucky (!) enough to have been on a maths or physics course taught by me will know how I like to moan about the mathematics of the new pound coin…

## Number of days until first Premier League manager sacking

I’ll get straight to the point, on average the first Premier League manager is sacked after 77 days.