My Ethereum address

If you want to send Ethereum or other compatible tokens to me this is my main wallet address: 0x3Ae138A03F77dfC65fc6e27063C3E65f6668359c

Curriculum Vitae

My Curriculum vitae is available  here: CV-HansHarhoffAndersen2015. See also my LinkedIn profile.

Installing qutip on Windows

I had some problems installing Qutip on Windows. I solved them by adding the MinGW32-xy path to the Windows path environment. See details here.

Getting started with Python

I’ve written a short introduction to getting started with Python including IPython and how to set a default search path. It is mostly targeted Ubuntu users. Link to guide on Google Docs.

Ubuntu 14.04: Making it useful

sudo apt-get update && sudo apt-get dist-upgrade -y && sudo apt-get autoremove sudo apt-get install ipython-notebook htop vim flashplugin-installer nautilus-open-terminal spyder tortoisehg-nautilus network-manager-openconnect ssh

Total differentials

Total differentials are useful but how do you technically go from them to differentials of functions. Let’s define $f(x)$ as a continuous function. Then $$ df= \frac{\partial f}{\partial x} dx,$$ where df is called the total differential. If x(t) is a function t then how do we get this explicit dependence? $$ f = \int… Continue reading Total differentials

Getting the newest version of Octave for Ubuntu/Debian

If you want the newest version of Octave (3.8 as of the time of writing) you will need to compile it yourself. Do sudo apt-get build-dep octave sudo apt-get install libqscintilla2-9 libqscintilla2-dev wget tar -xvf octave-3.8.0.tar.bz2 cd octave-3.8.0 ./configure make make check sudo make install when this is done Octave should work for you. Keep… Continue reading Getting the newest version of Octave for Ubuntu/Debian

Fase-skift i øvelse 5

Det kan være svært at fitte til arctan i forbindelse med målingen af fasen i øvelse 5 i Mekanik og Termodynamik. Her er en lille forklaring og et udtryk med cosinus man kan bruge i stedet: phase