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Math fonts that worth noting

Solutions taken from ftp://tug.ctan.org/pub/tex-archive/info/Free_Math_Font_Survey/survey.html in TUG.

Times-resemble math font

Use either txfonts or mathptmx for Times font support. I personally prefer txfonts since its mathcal symbols look more natural to me.

To use: include \usepackage{txfonts} or \usepackage{mathptmx} in

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Install external python packages + virtualenv with Blender

Requirements: Blender 2.80+ (2.79 should also work with pip method, not tested thoroughly)

Step 1: Install virtualenv on the system

In order not to mix the packages installed for Blender (such as scipy, matplotlib) with those system-wide packages, we need to create a virtual environment for the Blender alone.

Best practice is to use a single virtualenv for each version of

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Render Blender files on cluster

This is a easy workaround to enable Blender rendering on a super-computing cluster. The samples shown here are based on the Euler cluster of ETH Zürich (IBM LSF batch system).

Step 1: install Blender binary on cluster

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Add objects to scene in Blender 2.80

Blender 2.80 introduces a new feature of collections, which (in my opinion) is a very important for various purposes like grouping objects, selectively enable / disable in view port, etc.

Accordingly, the codes also needs to be updated in 2.80 for adding an object to the active scene. From the documentation (https://wiki.blender.org/wiki/Reference/Release_Notes/2.80/Python_API/Scene_and_Object_API),

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Install python API for IBM LSF batch system

The short introduction describes how to install the python API for the IBM LSF batch system (like Euler cluster of ETH Zürich).

Find the system-wide LSF configure files

The python API relies on the system environment that is defined inside the file profile.lsf. On Euler cluster it is at: $LSF_ENVDIR/profile.lsf

Load the environmental variables by

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Problem

Python binding for openbabel might be not trivial to install on HPC cluster. Simple pip install openbabel are very likely to fail. Sample error messages are like:

Error: SWIG failed. Is Open Babel installed?
    You may need to manually specify the location of Open Babel include and library directories. For example:
      python setup.py build_ext -I/usr/local/include/openbabel-2.0 -L/usr/local/lib
      python setup.py install
    ----------------------------------------

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This can reduce files to ~15% of their size (2.3M to 345K, in one case) with no obvious degradation of quality.

ghostscript -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/printer -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf

Other options for PDFSETTINGS:

• /screen selects low-resolution output similar to the Acrobat Distiller "Screen Optimized" setting.
• /ebook selects medium-resolution output similar to the Acrobat Distiller "eBook" setting.
• /printer selects output similar to the Acrobat Distiller "Print Optimized" setting.
• /prepress selects output similar to Acrobat Distiller "Prepress Optimized" setting.

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$ ffmpeg -i input.mp4 -vcodec h264 -acodec mp2 output.mp4

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This is a very rough tutorial for myself when setting up the "NAS" on Raspi4. Don't copy all steps if you want RAID on the NAS (for the moment)

Network setting part

1. Burn the image of Raspberry Pi onto the card. Follow this guide
2. Edit the Wifi / SSH / password etc
3. Install mDNS avahi-daemon. Remeber to enable the lines with

publish-workstation=yes

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Example yaml files to use launchpad in FireWorks

Choose the template for your configuration

• Plaintext password: my_lauchpad_passwd.yaml
• X509 TLS certificate: my_lauchpad_certx509.yaml

Remember to modify the fields marked with <>. The certificate file should be placed in a searchable location (with proper mode)