A hot-filament ionization gauge (HFIG) is a type of vacuum gauge used to measure low pressures, typically in the range of 10^-3 to 10^-9 torr (or mbar). It operates based on the principle of ionization created by a hot filament, which serves as the electron source.
Aquadag is a colloidal graphite suspension used primarily as a conductive coating for various applications, particularly in the field of electronics and materials science. It is often employed to create a conductive layer on non-conductive surfaces or to enhance the conductivity of certain materials. Key features of Aquadag include: - **Composition**: It typically consists of finely divided graphite particles suspended in water, which gives it both conductive and protective properties.
Audion is a software application that was originally developed for macOS as an audio player and streaming client, created by the company Known as Panic. It gained popularity in the late 1990s and early 2000s for its ability to handle various audio formats and for its user-friendly interface. Audion was known for its support of internet radio streaming, allowing users to listen to live broadcasts.
The KT66 is a type of vacuum tube (or valve) that was first developed in the 1940s by the British company, GEC (General Electric Company). It is a beam tetrode, which is a type of electron tube that is commonly used in audio amplification applications, particularly in guitar amplifiers and hi-fi audio equipment.
Concurrent validity is a type of validity used to assess the effectiveness of a test or measurement tool by comparing its results with those of a well-established criterion or benchmark that is measured at the same time. In other words, it evaluates how well one measure correlates with another measure that is considered to be a valid indicator of the same construct. To establish concurrent validity, researchers typically: 1. **Select a new test or instrument**: This is the measure whose validity is being evaluated.
A photomultiplier tube (PMT) is a highly sensitive electronic device that detects and amplifies light. It is commonly used in various applications, including particle physics, medical imaging, nuclear and radiation detection, and fluorescence spectroscopy. The PMT operates by converting incoming photons into an electrical signal, which can then be measured.
Secondary emission refers to the phenomenon where primary energetic particles (such as electrons or photons) strike a material and cause the ejection of additional particles from that material. This process is common in various fields, including physics, materials science, and engineering. Here’s a brief breakdown of how secondary emission works: 1. **Primary Energy Input:** An incoming particle (like a high-energy electron or photon) impacts the surface of a material.
Discriminant validity is a type of validity used in psychology and social sciences to assess whether a particular construct or measure is distinct and not overly correlated with other constructs that it should theoretically be different from. In essence, discriminant validity ensures that a measurement does not correlate too highly with other measures that are supposed to be conceptually unrelated. To establish discriminant validity, researchers typically use various statistical techniques, including: 1. **Correlation Analysis**: Assessing the correlations between measures of different constructs.
"Triple-twin" can refer to different concepts depending on the context, but it is often associated with medical or biological terms, especially in reproductive contexts. Here's a brief overview of potential meanings: 1. **Reproductive Context**: In obstetrics, "triple-twin" could refer to the occurrence of triplet pregnancies that result in three sets of twins. This is a rare and complex scenario in multiple births.
A **local variable** is a variable that is declared within a function or a block of code, and its scope is limited to that function or block. This means that the variable can only be accessed or modified from within the function or block where it was defined. Local variables are typically used to store temporary data that is needed only for the duration of that specific function's execution.
WD-11 is a chemical compound that is a type of synthetic lubricant, specifically designed for use in a variety of applications, including rust prevention and as a solvent. It is often used in automotive and industrial settings for its ability to penetrate and loosen rusted or stuck parts. The name "WD" stands for "water displacement," which reflects its ability to displace moisture.
An unreferenced variable, also known as an unused variable, is a variable that has been declared in the code but is never used in any operations or expressions throughout the program. Essentially, it is a variable that does not contribute to the program's functionality because it is not accessed or manipulated after its declaration.
User-generated content (UGC) refers to any form of content—such as text, videos, images, reviews, and audio—created and published by users or consumers of a platform, rather than by the platform itself or professional content creators. UGC is typically shared on social media, websites, blogs, and other online spaces, and it plays a crucial role in shaping brand perception, community engagement, and online conversations.
High Resolution Electron Energy Loss Spectroscopy (HREELS) is a surface-sensitive analytical technique used to study the electronic and vibrational properties of materials, particularly surfaces and thin films. It involves the scattering of low-energy electrons (usually in the range of a few electron volts) from a material's surface, which provides detailed information about the energy levels of electrons in the material as well as various phonon modes (vibrations of the lattice).
Interactive storytelling is a form of narrative that allows audiences to actively participate in the story's development, often leading to multiple potential outcomes based on choices made by the participants. Unlike traditional storytelling, where the narrative is fixed and conveyed in a linear fashion, interactive storytelling empowers individuals to influence the plot, characters, and sometimes even the setting. Key aspects of interactive storytelling include: 1. **User Agency**: Participants have the ability to make decisions that affect the direction and outcome of the story.
"Fog of war" is a concept often used in military strategy and tactics, referring to the uncertainty and confusion that can occur in the midst of battle. It describes the limited knowledge that a commander has about the enemy's movements, capabilities, and intentions due to various factors such as terrain, lack of reconnaissance, the chaos of combat, and misinformation. This uncertainty can affect decision-making and ultimately influence the outcome of battles and wars.
A "griefer" is a term commonly used in online gaming and digital communities to describe a player who deliberately irritates or harasses other players. This can be done through disruptive behavior, such as destroying other players' creations, stealing resources, or engaging in tactics that ruin the gameplay experience for others. Griefers often seek to provoke reactions from other players or simply enjoy the chaos their actions create.
Variety Jones by Ciro Santilli 40 Updated 2025-07-16
2015 The Variety Show On the trail of the man believed to be Variety Jones, one of the architects of the defunct drug marketplace Silk Road. www.vice.com/en/article/wnx5qn/the-variety-show
www.justice.gov/usao-sdny/file/797251/download some kind of case file of his trial.
The curious thing about VJ is that he actually has some culture and says cool things, e.g.:
IRL - is there anyone with a clue at all? Girlfriend, boyfriend, bunny you talk to, online buddy's who you've know for years? Gramma, priest, rabbi, stripper?

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