∫ntegrabℓε ∂iﬀerentiαℓs · unorganised notes, code, and writings of random topics

Parallel computing in Python standard library

August 29, 2018 blog code

There are multiple ways to do parallel computing using only the standard library in Python. There are vastly more way to do parallel processing and multiprocessing if third-party modules are used. [more]

Using pythonnet to interface CSharp library

August 15, 2018 blog code

Recently I encountered the issue of having to call some functions from an third-party library, which is available as .NET DLL only (is it called “assembly” in .NET jargon?). It doesn’t worth the effort to learn and write code in C# just to be able to use the library. So... [more]

Lamport et al (1982) The Byzantine Generals Problem

August 13, 2018 paper

About fault tolerance in a distributed system. Using the metaphor of a number of Byzantine generals have to come to a consensus of action, while the communication may not be accurate. For example, the sender of a message may be a traitor such that the message may be different to... [more]

Tupaj et al (1996) Extracting Tabular Information From Text Files

August 10, 2018 paper

A paper on how to identify and extract tables from scanned text documents. The author describe the whole process as four phrases: (1) isolate potential table areas, (2) OCR, (3) isolate the beginning and end of the tables, (4) isolate table components, i.e., header, cells, footer. [more]

Encrypting a file with OpenSSL

August 7, 2018 blog system

A natural question from using SSH for a while is whether we can reuse the SSH authentication key for other use, say, encrypting a file. The answer is affirmative in OpenSSL but it is not straightforward. [more]