A bearing surface refers to the area of contact between two surfaces that bear a load with the intention of allowing for relative motion between them. This term is commonly used in engineering, particularly in mechanical systems where components such as shafts, pivots, and slides are involved. Key points about bearing surfaces include: 1. **Functionality**: The primary function of a bearing surface is to reduce friction between moving parts, thereby facilitating smoother motion.
Break-in, also known as mechanical run-in, is a process that involves the gradual settling of parts in a mechanical system, such as an engine or transmission, to ensure that they operate effectively and efficiently. This initial period is crucial for several reasons: 1. **Seating of Components**: During break-in, components such as piston rings and cylinder walls wear slightly to create a better fit, which can improve sealing and reduce blow-by (the escape of combustion gases past the piston).
An Arrhenius plot is a graphical representation used in chemistry and physics to analyze the temperature dependence of reaction rates or diffusion processes. It is named after the Swedish scientist Svante Arrhenius, who formulated the Arrhenius equation, which describes how the rate of a chemical reaction increases with temperature.
Goldbeter–Koshland kinetics, also known as the "Goldbeter-Koshland model" or the "biochemical switch model," describes a specific type of enzymatic reaction mechanism that accounts for the regulation of enzyme activity through allosteric interactions and feedback. The model was proposed by two biochemists, Serge Goldbeter and Daniel Koshland, in the 1980s.
The Zeldovich mechanism refers to a process in astrophysics and cosmology that describes the formation of primordial black holes (PBHs) through the gravitational collapse of density fluctuations in the early universe. Proposed by Russian physicist Yakov Zeldovich in the 1970s, the mechanism is particularly relevant in the context of the inflationary model of the universe.
Ditungsten tetra(hpp) refers to a coordination compound involving tungsten. Specifically, it is composed of two tungsten (W) atoms and is coordinated with four molecules of "hpp," which stands for 1,2-bis(hydroxymethyl)propane-1,2-diamine, a type of ligand.
An archipelago is a group or cluster of islands, usually in a large body of water. Archipelagos can vary in size and the number of islands they contain, ranging from just a few to thousands. They can form as a result of volcanic activity, erosion, rising sea levels, or other geological processes.
Vaporization is the process by which a substance transitions from the liquid phase to the gas phase. This process can occur through two main methods: evaporation and boiling. 1. **Evaporation**: This is a gradual process that takes place at the surface of a liquid at any temperature. It occurs when molecules at the surface gain enough energy to overcome intermolecular forces and escape into the vapor phase. This can happen even at temperatures below the boiling point of the liquid.
"Dune" is a science fiction franchise initially created by author Frank Herbert. The original novel, titled "Dune," was published in 1965 and is considered one of the greatest science fiction novels of all time. It is set in a distant future amidst a vast interstellar empire, focusing on the desert planet of Arrakis, also known as Dune.
A land bridge is a natural connection between two larger landmasses that allows for the movement of plants, animals, and humans across previously separated regions. Historically, land bridges have played a significant role in the migration and evolution of species by providing pathways for them to move into new areas. One of the most well-known examples of a land bridge is the Bering Land Bridge, which once connected Asia and North America during the last Ice Age.
A roadstead is a term used in maritime contexts to refer to a part of a body of water where ships can anchor safely. Typically, a roadstead is located near a harbor or port but is not as sheltered as a full harbor. It often has sufficient depth and space for vessels to maneuver and is generally protected from heavy seas, although it might still be exposed to winds.
Tides are the regular rise and fall of sea levels caused primarily by the gravitational pull of the moon and the sun on Earth. This phenomenon results in predictable changes in water levels along coastlines, typically occurring in cycles of approximately 12 hours and 25 minutes between high and low tides.
The Antarctic Circumpolar Wave (ACW) is a large-scale oceanic and atmospheric phenomenon that circulates around Antarctica in a wave-like manner, influencing the climate and oceanographic conditions in the Southern Ocean. It is characterized by oscillating patterns in sea surface temperature, sea level pressure, and other oceanic and atmospheric variables. The ACW is typically associated with the Antarctic Circumpolar Current (ACC), which flows around Antarctica and is the world's strongest ocean current.
Extinction debt refers to the phenomenon where a species is at risk of extinction in the future despite currently still existing in a habitat or ecosystem. This can occur when environmental changes or habitat loss have already caused significant declines in population or reproductive success, making it likely that the species will eventually go extinct even if immediate conditions might seem suitable for its survival. The concept of extinction debt is often associated with habitat fragmentation, climate change, or other human-induced pressures that impact ecosystems.
As of my last update in October 2023, LinBi is not a widely recognized term or brand in major sectors such as technology, finance, or general knowledge. It could potentially refer to a company, product, or concept that has emerged recently or is specific to a niche.
The intertidal zone, also known as the tidal zone, is the area of the shore that lies between the high tide and low tide marks. It is a unique and dynamic ecosystem that experiences varying environmental conditions, including changes in water salinity, temperature, and exposure to air and sunlight, depending on the tidal cycle.
An oceanic basin is a vast, submerged area of the Earth's surface that is covered by ocean water. It is characterized by various geological features, including: 1. **Continental Margins**: The areas where the ocean meets the continents, which can include continental shelves, slopes, and rises. 2. **Mid-Ocean Ridges**: Underwater mountain ranges formed by tectonic activity, where new oceanic crust is created as magma rises from the mantle.
A submarine landslide is a rapid downward movement of sediment or rock that occurs under the sea, typically along the continental shelf or slope. These landslides can be triggered by various factors, including: 1. **Seismic Activity**: Earthquakes can destabilize underwater slopes, causing the sediment or rock to slide. 2. **Sediment Loading**: Accumulation of sediment can increase the weight on underlying layers, leading to instability.
The Tasman Front is an oceanic boundary located in the Tasman Sea, which lies between Australia and New Zealand. This front is characterized by a sharp transition between colder, nutrient-rich waters and warmer, less productive waters. The front can often influence local marine ecosystems and weather patterns. The Tasman Front plays a significant role in the dispersal of marine species and can affect fisheries in the region.
Preconsolidation pressure is a key concept in soil mechanics and geotechnical engineering. It refers to the maximum effective stress that a soil layer has been subjected to in the past, and it is an important factor in determining the compressibility and settlement behavior of soil. When soils undergo loading, they may experience changes in volume and structure. Preconsolidation pressure indicates the historical maximum pressure that the soil has experienced before a current loading condition.

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