gngdb

## Hibernating
Want to hibernate at low battery automatically. First getting hibernate to work. Created swap partition larger than RAM (8Gb) and set it up with mkswap and swapon as in [Arch Wiki](https://wiki.archlinux.org/index.php/Swap). Added kernel parameters to grub. **Problem**: didn't read the article properly and forgot to add to fstab so swap didn't stay on reboot.

Next should use udev rule to get the system to auto-hiberate at 5% or similar. [Forum post](https://bbs.archlinux.org/viewtopic.php?pid=1164408) appears to cover how to do this, but doesn't. It's in the [Laptop page](https://wiki.archlinux.org/index.php/laptop#Udev_events) of the arch wiki.

```
# Suspend the system when battery level drops to 2%
SUBSYSTEM=="power_supply", ATTR{status}=="Discharging", ATTR{capacity}=="2", RUN+="/usr/bin/systemctl suspend"
```

gngdb

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gngdb

ctrl_interface=/var/run/wpa_supplicant
eapol_version=1
ap_scan=1
fast_reauth=1

network={
	ssid="eduroam"
	identity="email@address.com"
	#psk="your password goes here"
        # or:

gngdb

name = WPA2-PEAP-NODOMAIN
author = atiketemola
version = 1
require identity *Username password *Password
protected password *Password
-----
ctrl_interface=/var/run/wpa_supplicant
network={
    ssid="$_ESSID"
    proto=RSN

gngdb

------------------------------------------------------------
/usr/bin/pip3 run on Fri Nov  7 12:38:03 2014
Downloading/unpacking h5py
  Getting page https://pypi.python.org/simple/h5py/
  URLs to search for versions for h5py:
  * https://pypi.python.org/simple/h5py/
  Analyzing links from page https://pypi.python.org/simple/h5py/
    Skipping link https://pypi.python.org/packages/2.6/h/h5py/h5py-2.2.1.win32-py2.6.exe#md5=ce6c26dc8ef1fea864ecf286c1e4cb98 (from https://pypi.python.org/simple/h5py/); unknown archive format: .exe
    Skipping link https://pypi.python.org/packages/2.6/h/h5py/h5py-2.3.0.win32-py2.6.exe#md5=23f12194da7e5fededa2e590c6531f51 (from https://pypi.python.org/simple/h5py/); unknown archive format: .exe
    Skipping link https://pypi.python.org/packages/2.6/h/h5py/h5py-2.3.0b1.win32-py2.6.exe#md5=92174de66333d5ec4919d3a5bf7cb302 (from https://pypi.python.org/simple/h5py/); unknown archive format: .exe

gngdb

misc

gngdb

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gngdb

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gngdb

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gngdb

{"nbformat_minor": 0, "cells": [{"source": "Question 2\n====\n\n> Consider a noisy oscillator given by\n> \n $$\n \\mathbf{x}  = \\alpha R \\mathbf{x} + \\mathbf{\\epsilon}\n $$\n>\n> where R is a unitary rotation matrix through a small angle and epsilon is a very small isotropic Gaussian noise term.\n> Initialise at the unit vector. What happens to this system over time if $\\alpha=1$? What if $alpha < 1$? Draw an\n> example picture\n\nSo I'm not going to draw it, it's going to draw itself.\n", "cell_type": "markdown", "metadata": {}}, {"execution_count": 1, "cell_type": "code", "source": "import numpy as np\n%matplotlib inline", "outputs": [], "metadata": {"collapsed": true, "trusted": true}}, {"execution_count": 2, "cell_type": "code", "source": "# initialise unit column vector\nx = np.ones((2,1))", "outputs": [], "metadata": {"collapsed": false, "trusted": true}}, {"execution_count": 3, "cell_type": "code", "source": "#define our update equation\ndef update(x, alpha, R, var_epsilon):\n    return alpha*np.