Blog | Hendrik Erz

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I almost got scammed today

The internet is full of scammers, and their most beloveth tool is emails. Therefore, whenever you receive an unsolicited email, you should be very careful whether even to reply. But even with many years of experience and after doing proper research, scammers can get you. Let me today share an episode where I almost got scammed myself.


Tous pour libéralisme?

France has voted. And it got another five years to ensure that the right-wing candidate Marine Le Pen has no chance of securing the presidency of one of the central states within the European Union. However, these elections were a warning sign for Emmanuel Macron. Here, I collect some loose thoughts on the election.


Zotero 6: A Review

Zotero 6 is out — time for a review. I tested the app in production for two weeks now and want to share my thoughts.


Selling Trust, Part II: How Microsoft Harms the Security of their Users

Two years ago, I bough my first code signing certificate. A week ago, I bought a second one. In this article I report my experiences and explain why the practices of Microsoft revolving around code signing put Windows users in harms way.


Stumbling out of a Pandemic

After two years of staying within our own four walls, the doors to the world are slowly reopening. As expected, we are social beings and therefore like to be in the presence of other people. But what surprises me is the amount of routine we lost over the past 24 months. It appears that the exit from the pandemic is just as harsh as the entry into it. Rather than walk out of it, we stumble.


Quo Vadis, PKM?

Arthur Perret has published an article on the point of graph views just yesterday, pivoting on the recent addition of graph views in Zettlr. This article is one half reply to his important points of criticism, and one half outlook on the future of personal knowledge management (PKM) in general.


How I Work, Part IX: RSS Readers

This part of my How I Work series focuses on a somewhat archaic technology that has lost some of its relevancy in recent years. However, this technology — RSS, or Really Simple Syndication — has a lot to offer in terms of delivering relevant content in an age where your Twitter feed mostly consists of some random people disseminating funny, but ultimately noninformative, news. In this article I walk you through what RSS is, where it came from, and what it has to offer in 2022 where social networks are ubiquitous.


Why I don’t use Jupyter Notebooks anymore

Jupyter Notebooks are an awesome way to explain code to people, but for the past year I've tried to utilize them as a convenient way of prototyping data analyses in a layered fashion. My aim was to not having to rerun expensive calculations everytime some later part of my code raised an exception. But in the end, these notebooks hampered my progress and I've since switched back to running plain Python scripts from the terminal. Here's why I don't use notebooks anymore.


Sparse Matrices, or: How to store 10 GB of data in 100 MB

Working with large datasets requires to constantly improve your memory management skills. While I have figured out how to read in a lot of data efficiently a year ago, in today's article I show you how I learned to store information efficiently once I had read it in.


Open Source has a Sustainability Crisis

I have already written about the somewhat desolate status of Open Source. However, given the recent incident involving colors.js and GitHub user Marak, I argue that these dumpster fires are being fueled by what I call a Sustainability Crisis of Open Source. There is no easy way out, but we cannot forsake Open Source either.


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