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Homöopathie This post is about Homeopathy. If you want to read it, try deepl.com Homöopathie ist eine Gruppe von Behandlungsmethoden die auf Vorstellungen von Samuel Hahnemann (ca 1796) basieren. Die Idee Ähnlichkeitsprinzip "Ähnliches möge durch Ähnliches geheilt werden". Ein homöopathisches Arzneimittel soll so ausgewählt werden, dass die Inhaltsstoffe der Grundsubstanz … Read More »

Movielens Data Set I'm recently thinking a lot about recommendations and about building the book recommendation portal I had in mind since 2013. However, for recommendation systems it is as hard as with any branch of machine learning to find a good overview over techniques, their respective strengths and drawbacks as well as … Read More »

How to analyze Set Data Exploratory Data Analysis (EDA) is nice and easy, if the entities you look at are of one of the typical levels of measurement (see below). But if one feature is a set, it becomes harder. In this post, I want to show a couple of possibilities. Level of measurement If … Read More »

CMS Page Versions I'm currently building a service which contains a CMS. So I have pages of which I want to store the history how they changed over time. I wonder what the advantages / disadvantages of different options are. I've looked at a couple of well-known CMS systems to see what they are … Read More »

TLS and Nginx Transport security is an important topic nowadays. We don't want a man in the middle (MITM) to be able to read our communication with banks, our e-mails, or our medical apps. Hence we need encryption of our data at the transport layer level. The Problem of Internet Connections The internet … Read More »

Celery Celery is a task queue. I was experimenting with it today and want to share some insights. The Problem Think of YouTube. Users can upload videos, but before they are shown on the platform they need to get processed. Converting the format, checking for illegal content. This takes a considerable … Read More »

Computer Temperature I just realized that my Thinkpad T460p gets really loud. I suspect that there is just quite some dust in the machine so that the fan gets louder. But I'm not sure how to check that and I hesitate to open the machine. So let's see which information I can … Read More »

SQL Connection Strings When you want to connect to a database in SQLAlchemy, you need a connection string. It usually has the form dialect[+driver]://user:[email protected]/dbname[?key=value..] Quite often, the user is root and the host is localhost. Once you have the valid connection string, you can test if … Read More »

Vegetable Curry Curry is a dish found in many asian countries. It's always spicy, but necessarily in the hot-spicy sense. There are just a lot of spices in Curry 🙂. Vegetable Curry Ingredients For 3 people, you need: 500g Broccoli 1 Zucchini 1 big onion 1 pepper 2 carrots 3 spring onions 0 … Read More »

Gunicorn sync Async Workers tornado AsyncIO Workers worker gevent eventlet gaiohttp gthread core characteristic * Per request a process* Blocks other requests until it is finished * based on the Greenlet library* Program-level threads * based on the Greenlet library* Program-level threads *provides async I/O non-blocking design model* ideal for handling long requests … Read More »