http://bjoernstechblog.rueffer.info/
last updated on 27 February 2016

# Björn Rüffer/Björn's Blog

## How I set up my ruby environment (on a Mac/Yosemite)

###### 20 May 2015

This post is a little memory aid for myself, as I repeatedly had the problem of having to re-set up my ruby/gems/bundler environment. I need this mainly to run jekyll.

The key is to get the shell environment set up correctly and to install bundler. Bundler then takes care of setting up jekyll and its dependencies based on an appropriate Gemfile that resides in the root directory for my homepage. In that directory I only have to say bundle and everything happens automatically from there, at least as long as the above mentioned prerequisites are met.

## Alphabetically numbered references for use in LaTeX letters

###### 23 November 2014

Do you write letters that have bibliographies, like scientific reports? Do you like to typeset your letters in LaTeX using either the class letter or scrlttr2? Then the letter class option file provided below might be just the thing you want: It facilitates alphabetically numbered references for letters that otherwise would not provide a thebibliography environment. You can use this file either as in

\documentclass[bib,<other lco files and options>]{scrlttr2} 

or, if using the standard letter class (or any other document class, really), by loading the code as

## Exporting references from BibDesk to Stud.IP

###### 13 September 2014

I maintain a significant BibTeX database with all the scientific literature that I ever come across. Recently, I needed to publish a list of recommended literature for a course I was teaching at the University of Passau.

As many other German universities, Passau is using an online platform called Stud.IP where teaching staff can maintain course material and provide easy access for students. (As a side note, this system is very mature and user friendly, quite the opposite to certain other systems with similar intentions like PAUL).