# Roland's homepage

My random knot in the Web

## Introduction

The purpose of this program is to calculate some properties of fiber-reinforced composite laminates. It calculates:

• engineering properties like $$E_x$$, $$E_y$$, $$G_{xy}$$
• thermal properties $$\alpha_x$$ and $$\alpha_y$$
• physical properties like density ($$\rho$$) and laminate thickness ($$t$$)
• stiffness (or ABD) and ...
2. ## foto4lb

Photos from modern digital cameras are generally so large these days that you have to shrink them to use them in a document. I do this a lot, so I automated it.

The foto4lb.py script shrinks the files it is given to a width of 886 pixels, and shrinks ...

3. ## csv2tbl

The csv2tbl.py script takes a comma-separated values (“csv”) file, and converts it to a LaTeX table. It handles a couple of different possible seperators; semicolon, comma and tab. Of those it automatically pics the one that occurs most.

N.B.: it does not try to interpret quotation marks!

It ...

4. ## dicom2png

This simple python script uses ImageMagick to convert DICOM images from a Philips digital X-ray machine to PNG format. It crops the images from 2048x2048 pixels to 1574x2048 pixels, the actual size of the detector.

To speed up the processing of multiple pictures, this script runs the conversions in parallel ...

5. ## genbackup

This shell-script makes a backup (with the tar program) of the directory from which it is called, with all its contents. It is one of the smallest scripts I’ve ever written but I’ve found it really useful to make fast complete backups of e.g. source archives.

The ...

One way of making hard to guess passwords is to take random data and encode it with base64 to make it readable. This is what I’ve done in the genpw.py script.

This is mainly useful for passwords that you can store in a secure manner (like in an ...

7. ## git-check-all

This scripts looks for all directories in the users’ home directory that are managed by the git revision control system (i.e. that have a .git subdirectory).

For each of those directories it checks whether there are uncommitted changes by running git status. If there aren’t any, it runs ...

8. ## gitdates

In answer to this question on stackechange, I wrote gitdates.py (available from github). If it is called from a directory that is under git resivion control, it lists all the files there with the short hashtag and the date from when they were last committed. The current version is ...

9. ## make-flac

In this day and age I want to have my music collection available on my computer. Lugging around all my CDs is unpractical and storage is relatively cheap. So I’ve used FLAC to convert them all to high-quality music files.

The make-flac python script is what I use to ...

10. ## make-mp3

After writing the make-flac python script, I adapted a copy to use LAME to generate variable bitrate MP3 files instead.

You can find make-mp3.py on github. Apart from python (version 3) it requires LAME.

Note

The script is now compatible with both Python 2 and Python 3. But is ...

Page 1 / 3