Obsidian (software) by Ciro Santilli 40 Updated 2025-07-16
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Figure 1.
Obsidian demo
. Source.
Project Xanadu by Ciro Santilli 40 Updated 2025-07-16
Crazy overlaps with Ciro Santilli's OurBigBook Project, Wikipedia states:
Administrators of Project Xanadu have declared it superior to the World Wide Web, with the mission statement: "Today's popular software simulates paper. The World Wide Web (another imitation of paper) trivialises our original hypertext model with one-way ever-breaking links and no management of version or contents.
Video 1.
New Game in Town by TheTedNelson (2016)
Source.
Second brain by Ciro Santilli 40 Updated 2025-07-16
In the 2020's, this refers to writing down everything you know, usually in some graph structured way.
This is somewhat the centerpiece of Ciro Santilli's documentation superpowers: dumping your brain into text form, which he has been doing through Ciro Santilli's website.
This is also the closest one can get to immortality pre full blown transhumanism.
Ciro's still looking for the restore this plaintext backup on a new body though.
It is a good question, how much of your knowledge you would be able to give to others with text and images. It is likely almost all of it, except for coordination/signal processing tasks.
His passion for braindumping like this is a big motivation behind Ciro Santilli's OurBigBook.com work.
Zettelkasten by Ciro Santilli 40 Updated 2025-07-16
zettelkasten.de/posts/overview/ mentions one page to rule them all:
How many Zettelkästen should I have? The answer is, most likely, only one for the duration of your life. But there are exceptions to this rule.
NGC 1893 is an open cluster of stars located in the constellation Cassiopeia. It is situated near the more well-known nebula known as the LBN 762, also referred to as the “Cederblad 126” nebula. NGC 1893 is notable for being a relatively young cluster, with an age of around 3 to 5 million years, and it contains a mix of stars in various stages of development.
The Gamma distribution is a continuous probability distribution defined by two parameters: shape (often denoted as \( k \) or \( \alpha \)) and scale (denoted as \( \theta \) or \( \beta \)). It is widely used in various fields, including statistics, finance, and engineering, due to its ability to model waiting times and processes that are characterized by events that occur independently at a constant average rate.
Bradymetabolism refers to a slower than normal metabolic rate. It is characterized by a reduced rate of metabolic processes, which can impact how the body processes and uses energy, nutrients, and oxygen. This term is often used in medical contexts to describe conditions that may lead to lower energy expenditure, such as hypothyroidism, where there is an underproduction of thyroid hormones that regulate metabolism.
Heat illness refers to a range of health conditions that arise from the body's inability to regulate its temperature in response to extreme heat. It often occurs during hot weather or in situations where individuals are exposed to high temperatures for prolonged periods, such as during physical exertion or in hot environments. Heat illnesses can vary in severity, from mild to life-threatening, and include several specific conditions: 1. **Heat Cramps**: These are painful muscle contractions that often occur during intense exercise in hot weather.
The CARIACO Ocean Time Series Program is a long-term scientific study that focuses on the Caribbean Sea, particularly the region off the coast of Venezuela in the Cariaco Basin. Established in 1995, the program involves continuous monitoring and data collection aimed at understanding the ocean's physical, chemical, and biological processes.
Wold's theorem, named after the Swedish mathematician Herman Wold, is a fundamental result in time series analysis. It provides a decomposition of a wide-sense stationary time series into two components: a deterministic part and a stochastic part. Specifically, Wold's theorem states that any stationary process can be represented as: 1. A sum of a deterministic component (which may include trends, seasonal effects, and other predictable elements).
Satellite Image Time Series (SITS) refers to a sequence of satellite images captured over a specific area at different points in time. These images, which can be taken using various remote sensing technologies (such as multispectral or hyperspectral sensors), allow researchers and analysts to study changes in the Earth's surface, such as land cover change, vegetation dynamics, urban development, natural disasters, and climate change effects.
The Seasonally Adjusted Annual Rate (SAAR) is a statistical technique used to adjust economic data to account for seasonal variations. This adjustment helps to provide a clearer picture of underlying trends by removing the effects of predictable seasonal patterns—such as increased retail sales during the holiday season or higher construction activity during the summer months. Here's a breakdown of the components: 1. **Seasonally Adjusted**: This means that the data has been modified to eliminate the impact of seasonal fluctuations.
An unevenly spaced time series is a sequence of data points collected or recorded at irregular intervals over time, rather than at uniform or fixed time intervals. In such a series, the time difference between consecutive observations can vary significantly. This irregularity can arise from various factors, such as: 1. **Natural Events**: Data might be collected at irregular intervals due to the occurrence of sporadic events, such as natural disasters, which can lead to gaps or uneven spacing in the time series.
Computer-Aided Verification (CAV) is a branch of formal methods in computer science that focuses on the application of automated techniques to verify the correctness of systems, particularly software and hardware systems. The goal of CAV is to ensure that a given system meets specified requirements and behaves as intended in all possible scenarios. Key aspects of Computer Aided Verification include: 1. **Formal Methods**: CAV uses mathematical models to describe systems and formal specifications to define expected behaviors.

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 2.
    You can publish local OurBigBook lightweight markup files to either https://OurBigBook.com or as a static website
    .
    Figure 3.
    Visual Studio Code extension installation
    .
    Figure 4.
    Visual Studio Code extension tree navigation
    .
    Figure 5.
    Web editor
    . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
    Video 4.
    OurBigBook Visual Studio Code extension editing and navigation demo
    . Source.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact