Sandra Lahire was a British filmmaker and artist known for her experimental films and video works that often explore themes of feminism, memory, and the complexities of identity. Her work frequently incorporated personal narratives, blending autobiographical elements with broader social and political issues. Lahire's films were characterized by their innovative use of visual imagery and sound, often challenging traditional narrative structures.
Hypothetical chemical elements are theoretical substances that scientists have proposed based on various scientific principles but have not yet been observed or confirmed in nature. These elements are typically derived from extrapolations of existing theories in chemistry and physics, often related to the periodic table and nuclear stability.
"Time Shelter" is a novel by Bulgarian author Georgi Gospodinov, published in 2020. The book blends elements of reality, memory, and time travel, exploring the concept of nostalgia and the human desire to escape the present through the recollection of past times. The story revolves around a character who creates a "time shelter," a space that allows people to relive past eras, specifically the tumultuous history of Bulgaria, offering a sanctuary for the past.
"Gantz: G" is a manga series that serves as a spinoff of the original "Gantz" series created by Hiroya Oku. While the original "Gantz" follows a group of people who are resurrected after dying and forced to participate in deadly missions against aliens using technology provided by a mysterious black sphere known as Gantz, "Gantz: G" introduces new characters and settings while maintaining some of the core themes of action, survival, and moral dilemmas.
"Tales of the Abyss" is a Japanese role-playing video game (JRPG) developed by Namco Tales Studio and published by Namco. It was first released for the PlayStation 2 in 2005 and later received enhanced versions for various platforms, including the Nintendo 3DS. The game is part of the long-running "Tales" series and features a blend of traditional JRPG elements, including turn-based combat, exploration, and character development.
"Ultraseven" is a Japanese tokusatsu television series that first aired in 1967. It is part of the Ultra Series created by Eiji Tsuburaya and produced by Tsuburaya Productions. The show follows the story of an alien superhero, Ultraseven, who takes on human form to defend Earth from various monsters and extraterrestrial threats.
The Journal of Applied Remote Sensing is a peer-reviewed scientific journal that focuses on the application of remote sensing technologies and techniques to address various environmental, societal, and scientific challenges. It publishes research articles, reviews, and case studies that cover a wide range of topics, such as the analysis of satellite and aerial imagery, data processing, and the use of remote sensing in fields like agriculture, forestry, urban planning, climate science, and disaster management.
Life Sciences in Space Research encompasses the study of living organisms and biological systems in the context of space environments. This field investigates how various factors related to space, such as microgravity, radiation, and isolation, affect biological processes, health, and behavior of living organisms, including humans.
Planetary and Space Science is an interdisciplinary field that focuses on the study of planets, moons, asteroids, comets, and other celestial bodies, as well as various phenomena occurring in space. This field encompasses a range of subjects including: 1. **Planetary Geology**: The study of the composition, structure, and processes of planets and their moons, including surface features, atmospheres, and geological histories.
Einstein solid by Ciro Santilli 40 Updated 2025-07-16
One important quantum mechanics experiment, which using quantum effects explain the dependency of specific heat capacity on temperature, an effect which is not present in the Dulong-Petit law.
This is the solid-state analogue to the black-body radiation problem. It is also therefore a quantum mechanics-specific phenomenon.
Laser by Ciro Santilli 40 Updated 2025-07-16
What makes lasers so special: Lasers vs other light sources.
Video 1.
How Lasers Work by Scientized (2017)
Source.
An extremely good overview of how lasers work. Clearly explains the electron/photon exchange processes involved, notably spontaneous emission.
Talks about the importance of the metastable state to achieve population inversion.
Also briefly explains the imperfections that lead to the slightly imperfect non punctual spectrum seen in a real laser.
Video 2.
Laser Fundamentals I by Shaoul Ezekiel
. Source. 2008, MIT. Many more great videos in this series.
"Many Antennas" typically refers to a concept in wireless communication and networking that involves using multiple antennas at the transmitter and/or receiver to improve performance. This technique is often associated with a broader set of technologies commonly known as Multiple Input Multiple Output (MIMO).
Maximal entropy random walk (MERW) is a probabilistic model used in the field of statistical mechanics, random processes, and complex networks. It is based on principles of entropy, particularly the notion of maximizing entropy under certain constraints. The fundamental idea is to model a random walker’s movement across a network or graph in such a way that the walker explores the space as evenly as possible, while still respecting the underlying structure of the graph.
Multi-user MIMO (MU-MIMO) is a wireless communication technology that enhances the capacity and efficiency of a network by allowing multiple users to simultaneously share the same frequency channel. It is a key feature in modern wireless systems, particularly in LTE (Long Term Evolution) and 5G networks. Here's how it works: 1. **Multiple Antennas**: In MU-MIMO, the base station (e.g., a cell tower) is equipped with multiple antennas.
Outage probability is a term commonly used in telecommunications and networking to quantify the likelihood that a system or communication link will fail to meet certain performance criteria, such as data transmission rates or signal quality. It refers to the probability that the quality of service (QoS) falls below a predefined threshold, leading to the inability to effectively transmit information.
Sanov's theorem is a result in statistical mechanics and large deviations theory that describes the asymptotic behavior of the empirical measures of independent random variables. It provides a way to understand how the probabilities of large deviations from the typical behavior of a stochastic system decay as the number of observations increases. Specifically, Sanov’s theorem states that for a sequence of independent and identically distributed (i.i.d.
Surprisal analysis is a concept rooted in information theory, primarily developed by Claude Shannon. It measures the amount of information or "surprise" associated with the occurrence of a particular event, which is based on the probability of that event. The basic idea is that events that have low probability are more surprising when they occur than events that are highly probable.
Total correlation is a concept from information theory and statistics that measures the amount of dependence or shared information among a set of random variables. Unlike mutual information, which quantifies the shared information between two variables, total correlation extends this idea to multiple variables.

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