openSUSE, portable and persistent on a flash drive

Submitted by Detlev Conrad … on Fri, 10/14/2016 - 19:30

The idea to have a proper Linux installation on a Flash drive is about as old as my current Ultrabook, the Fujitsu U904 which I bought in winter 2013. Well, I finally got a fast and large enough Flashdrive (a tiny USB 3.0 32GB Sandisk, there are faster drives, but it is actually enough for openSUSE) and proceeded to fiddle with setting it up - and it works.

Plotting Negative and Positive Values on a Logarithmic Scale

Submitted by Detlev Conrad … on Tue, 05/31/2016 - 18:54

As I continue to deal with chemical kinetics, I was in a position in which I wanted to plot both negative and positive values on a logarithmic scale.

Why? I was looking at Rate of Production (ROP) analysis, where species can be produced and consumed. Do to the large range of magnitudes involved in chemical kinetics, a conventional linear scale is impractical when trying to plot the results.

R Scripts Repository on GitHub

Submitted by Detlev Conrad … on Sun, 05/29/2016 - 15:24

I have created an R-Scripts repository on GitHub to give any scripts that I share a permanent home.

The repository will contain scripts that I write which may become useful to other people. For a start, the scripts are provided only with the inline comments and no further explanations. They are aimed at people who know a bit about R and can thus understand the commands, though they may also be interesting to beginners. R experts will possibly have a better solution running within a few minutes.


My code on Github and Zenodo

Submitted by Detlev Conrad … on Sat, 07/11/2015 - 18:35

So, my PhD has been submitted and I can wait for the paperwork to advance and then the date of the viva...

While I always supported making the code available - and it was on Sourceforge as a zip-archive - (minus the Intel ODE library which must be downloaded separately), this has become official with the library recommending Github with Zenodo to create citable code.

Hence my Chemical Kinetics Solver has found an official home here:

Hello (ONA) Astoria - First Impressions

Submitted by Detlev Conrad … on Thu, 07/03/2014 - 22:18

Hello ONA Astoria - my new camera bag.

Some people may have seen my search for a camera bag on "" - if not, I was basically looking for a discrete large messenger camera bag.
The ONA Astoria perfectly fits that bill - nothing gives it away as a camera bag, except maybe the slightly boxy look - it is a bit thicker than regular messenger bags.

Fujitsu Lifebook U904 – Followup

Submitted by Detlev Conrad … on Thu, 02/06/2014 - 10:20

My initial review was written fairly soon after I bought the Fujitsu U904. Now I have had the time to use it for one and a half months in which it has replaced my university provided PC fulltime – unless I need access to papers/proprietary software that I cannot obtain.

I remain entirely satisfied with the quality of the U904 – in both manufacturing quality as well as engineering quality.

Initially I was slightly worried about the low key pitch on the keyboard – well, with extended use I have gotten more and more used to the keyboard which includes the low key pitch.

Review: Fujitsu Lifebook U904

Submitted by Detlev Conrad … on Wed, 01/08/2014 - 12:00

Disclaimer: Please note that the below represents my personal experience and opinion only.

Given that my last laptop was purchased in June 2008 and I had some personal reason to require a more up to date personal computer, I purchased a Fujitsu Lifebook U904 this December – so I have had it for a couple of weeks as of writing this.

My requirements for a laptop were fairly simple but also very specific:

The Future?

Submitted by Detlev Conrad … on Sun, 05/12/2013 - 16:01

A little bit of a roadmap: I have not been updating my site recently - also because I do not think there are any pressing updates.

Along the way I am planning a migration to Druapl 8 - although I will possibly need to wait until all my required plug ins are available.

The main content has however been ported over so that it is "ready to go" with some more tweaks once Drupal 8 is finally released. Other than that... - the new theme is "Responsive Bartik" which means my website is finally (!!) properly accessible on mobile phones!

Chemical Kinetics Solver Updated

Submitted by Detlev Conrad … on Thu, 01/24/2013 - 12:24

After a fair bit of time, my Chemical Kinetics Solver has been updated.

The changes are primarily "under the hood", but some changes in input handling are also included with the update. In addition, work on a more detailed documentation has begun, however it is quite empty as of now.

The project can be found at