Squeezed states of light are a type of quantum state of electromagnetic radiation that exhibit reduced quantum uncertainty in one variable (e.g., phase or amplitude) at the expense of increased uncertainty in the conjugate variable, in accordance with the Heisenberg uncertainty principle. This manipulation of uncertainty makes squeezed states an important resource in quantum optics, quantum information, and metrology.
A synchrotron light source is a facility that produces intense beams of light, including ultraviolet and X-ray radiation, through the acceleration of charged particles, typically electrons. The process takes advantage of the physics of synchrotron radiation, which is emitted when charged particles travel at relativistic speeds (close to the speed of light) in curved trajectories, usually in a circular or oval-shaped path within a synchrotron storage ring.
CRRC Maglev refers to a series of high-speed magnetic levitation trains developed by CRRC Corporation Limited, a major Chinese state-owned rolling stock manufacturer. These maglev trains utilize magnetic levitation technology, which allows them to float above the tracks, eliminating friction and enabling higher speeds compared to traditional rail systems.
The L0 Series typically refers to a type of product, often in technology or consumer electronics, but without specific context, it can mean different things. If you're referring to a specific context, such as a particular brand, device, or industry (like smartphones, CPUs, etc.), please provide more details. In some contexts, "L0" may denote a classification for a series of items that are at a foundational or entry level.
Super Bullet Maglev is a proposed high-speed transportation system that utilizes magnetic levitation (maglev) technology. Maglev trains operate on the principle of magnetic propulsion and levitation, which allows them to move at extremely high speeds while eliminating friction with tracks. The term "Super Bullet Maglev" generally refers to advanced maglev systems that aim to surpass the speeds of traditional bullet trains, which can reach speeds upwards of 300 km/h (about 186 mph).
Transport in Shanghai is highly developed and encompasses a variety of modes of transportation, making it one of the most connected and accessible cities in China and the world. Here are the main types of transport available in Shanghai: 1. **Metro**: Shanghai's metro system is one of the largest and most efficient in the world, with numerous lines serving the city and its suburbs. It is known for its affordability, efficiency, and extensive coverage.
The contact angle is a measure of the wettability of a solid surface by a liquid. It is defined as the angle formed between the tangent to the liquid interface and the solid surface at the three-phase contact line, where the solid, liquid, and gaseous phases meet. In practical terms, the contact angle can provide insights into how a liquid will interact with a solid surface: - **Low Contact Angle (0° to 90°)**: Indicates that the liquid wets the surface well.
Ferroics refer to a class of materials that exhibit specific types of ordering in their structure and properties, most notably ferromagnetism, ferroelectricity, and ferroelasticity. These materials have unique characteristics due to their dual nature—they can exhibit spontaneous ordered states (like magnetization or polarization) that can be reversed by external fields (magnetic or electric).
Storm Ciara was a powerful and impactful extratropical cyclone that affected large parts of Europe in early February 2020. It brought heavy rainfall, strong winds, and severe weather conditions to the UK and other countries, including parts of Ireland, France, and the Netherlands. The storm was associated with high winds that reached speeds of over 90 miles per hour (about 145 kilometers per hour) in some areas, leading to widespread disruption.
Thermal efficiency is a measure of how effectively a system converts heat energy into useful work or energy. It is often expressed as a percentage and is calculated by comparing the useful work output to the total heat input.
True vapor pressure refers to the pressure exerted by a vapor in thermodynamic equilibrium with its liquid (or solid) phase at a given temperature. It represents the tendency of a substance to evaporate and is specific to a particular temperature. True vapor pressure is typically measured in units such as millimeters of mercury (mmHg) or pascals (Pa).
The Van der Waals equation is an equation of state for real gases that modifies the ideal gas law to account for the volume occupied by gas molecules and the attractive forces between them.
The history of perpetual motion machines is a fascinating journey that spans centuries, reflecting the human quest for knowledge and understanding of the laws of physics. Perpetual motion machines are theoretical devices that can operate indefinitely without an external energy source, thereby violating the first or second laws of thermodynamics. Here’s a timeline of significant developments in the history of these machines: ### Ancient and Medieval Concepts - **Ancient Thoughts**: The concept of perpetual motion dates back to ancient civilizations.
The Third Law of Thermodynamics states that as the temperature of a perfect crystal approaches absolute zero (0 Kelvin, or -273.15 degrees Celsius), the entropy of that crystal approaches a minimum value, which is typically taken to be zero. In simpler terms, it implies that at absolute zero, a perfect crystalline substance would have no disorder and hence no entropy. This law has important implications in physics and chemistry, particularly in understanding the behavior of materials at very low temperatures and the concept of absolute zero.
The Blizzard of January 1881, also known as the Great Blizzard of 1881, was a severe winter storm that struck the central United States from January 12 to January 15, 1881. It was particularly devastating in the states of Wyoming, Nebraska, and surrounding areas, leading to extreme snowfall, frigid temperatures, and strong winds. The storm developed rapidly, affecting a large swath of the country and resulting in blizzard conditions characterized by heavy snowfall and whiteout visibility.
As of my last update in October 2023, Cyclone Andrea does not correspond to a widely recognized or documented tropical cyclone in major meteorological records. It is possible that it refers to a localized event, perhaps a lesser-known storm or one that occurred after my last update. Cyclones are classified and named by various meteorological organizations based on their strength and location, and new storms can form regularly, especially in tropical and subtropical regions.
Cyclone Dagmar refers to a significant weather event that occurred in December 2011 when a powerful storm system affected parts of Northern Europe, particularly Denmark, Norway, and Sweden. The storm brought high winds, heavy rainfall, and severe weather conditions, leading to disruptions in transportation and damage to infrastructure. Storms like Dagmar are part of a broader pattern of winter cyclones that can produce extreme weather in these regions, including blizzards and flooding.
As of my last knowledge update in October 2023, there was no record of a significant weather event or cyclone named "Joachim." Cyclones and hurricanes are named according to lists established by meteorological organizations, and new names can be assigned to storms as they form.
As of October 2023, Cyclone Tini does not appear to be a notable or recognized tropical cyclone in historical records or recent weather events. It's possible that it could refer to a newly formed system that emerged after my last update, or it may not be a widely recognized name for an existing cyclone. Tropical cyclones, or hurricanes/typhoons depending on their location, are named based on lists created by regional meteorological organizations. These names often vary by year and region.

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