A snow gauge, also known as a snow measurement gauge or snow depth gauge, is an instrument used to measure the depth of snow accumulation on the ground. It is an essential tool in meteorology and hydrology for understanding snowpack conditions, which can affect water resources, weather forecasting, and climate studies. There are various designs of snow gauges, but they typically consist of a cylindrical container or tube that captures falling snow.
Atmospheric research is a scientific field that focuses on the study of the Earth's atmosphere, including its physical, chemical, and biological processes. This research aims to understand various phenomena such as weather patterns, climate change, air quality, atmospheric chemistry, and the interactions between the atmosphere and other components of the Earth system, including oceans, land, and living organisms.
The National Centre for Medium Range Weather Forecasting (NCMRWF) is an institution in India that focuses on weather and climate forecasting over medium-range periods, typically from one to about 15 days ahead. Established in 1998, NCMRWF operates under the Ministry of Earth Sciences and is located in Noida, Uttar Pradesh.
The National Weather Service (NWS) in Wichita, Kansas, is a local office of the National Oceanic and Atmospheric Administration (NOAA) that provides weather forecasts, warnings, and other meteorological services to the region. The office serves central and south-central Kansas, covering areas including cities like Wichita, Hutchinson, and Newton. The NWS Wichita is responsible for monitoring weather conditions, issuing forecasts and severe weather alerts, and providing information related to climate and hydrology.
The Earth–ionosphere waveguide is a natural waveguide that forms between the Earth's surface and the ionosphere, which is a layer of the atmosphere filled with ionized gases located approximately 30 miles (about 48 kilometers) above the surface of the Earth and extending up to about 600 miles (about 965 kilometers) in altitude. This waveguide is particularly significant for the propagation of radio waves.
H II regions are areas of ionized hydrogen in space, typically found in star-forming regions of galaxies. The designation "H II" refers specifically to atomic hydrogen (H) that has been ionized, meaning its electrons have been stripped away, resulting in positively charged hydrogen ions (H⁺). These regions are often associated with young, hot stars, particularly O and B type stars, which emit large amounts of ultraviolet (UV) radiation.
Nuclear energy in Kazakhstan plays a significant role in the country's energy landscape and has a notable history. Here are some key points: 1. **Nuclear Power Plants**: Kazakhstan has plans to develop nuclear power generation capacity, although as of my last knowledge update in October 2023, it did not have any operational nuclear power plants. Plans have been discussed to build new nuclear facilities to diversify energy sources and meet rising domestic energy demand.
Governmental nuclear organizations are agencies or bodies created and operated by governments to oversee and regulate nuclear activities, including energy production, medical applications, research, and safety. These organizations play a crucial role in ensuring that nuclear technologies are used safely and responsibly, protecting public health and the environment. Each country may have its own governmental nuclear organizations, which can include regulatory bodies, research institutions, and entities responsible for nuclear energy administration.
The Bragg Institute is a research facility located in Australia, specifically at the Australian Nuclear Science and Technology Organisation (ANSTO) in Lucas Heights, New South Wales. It is named after the Bragg family, who made significant contributions to the field of X-ray crystallography and won the Nobel Prize in Physics in 1915. The Bragg Institute specializes in neutron scattering and various other techniques that utilize neutrons to study materials at the atomic and molecular levels.
Project Pluto was a research and development program initiated by the United States during the late 1950s to early 1960s. It aimed to create a nuclear-powered cruise missile known as the "SLAM" (Supersonic Low Altitude Missile). The project was conducted by the Los Alamos National Laboratory and the Douglas Aircraft Company, and it sought to develop an unmanned vehicle that could travel at supersonic speeds and carry nuclear warheads over long distances.
New START (Strategic Arms Reduction Treaty) is a nuclear arms control treaty between the United States and the Russian Federation that was signed on April 8, 2010, and came into effect on February 5, 2011. The treaty builds upon previous agreements, notably the START I treaty from 1991 and the Moscow Treaty from 2002, and aims to further reduce and limit the number of strategic nuclear weapons.
START I, or the Strategic Arms Reduction Treaty I, is a bilateral treaty between the United States and the Soviet Union, aimed at reducing and limiting strategic offensive arms. It was signed on July 31, 1991, and came into force on December 5, 1994. The treaty was a significant step in the process of arms control following the Cold War.
Shiva Uranium Limited is a company that was involved in the uranium mining and exploration sector. It primarily focused on uranium projects in countries with existing mining infrastructure, often exploring for new deposits and potentially developing uranium mining operations. The company was listed on stock exchanges and aimed to contribute to the energy sector, particularly in relation to nuclear energy, which utilizes uranium as fuel. However, it is important to note that companies' statuses, projects, and market relevance can change over time.
Kapitza instability refers to a phenomenon in physics observed in certain systems, particularly in the context of fluid dynamics and systems exhibiting oscillatory behavior, where a stable state can become unstable due to rapid changes in conditions or external forces. The term is named after the Russian physicist Pyotr Kapitza, who studied this kind of instability in the mid-20th century.
Photoionization mode refers to a process where an atom or molecule is ionized through the absorption of photons, typically in the ultraviolet (UV) or X-ray range. In this process, the energy of the incoming photons is sufficient to remove one or more electrons from the atom or molecule, resulting in the formation of positive ions.
In Dungeons & Dragons (D&D), magic is a central element of the game's fantasy setting, encompassing a wide range of supernatural abilities, spells, and effects that characters can wield or encounter. Here are some key aspects of magic in D&D: 1. **Spells**: Characters, particularly spellcasters such as wizards, sorcerers, clerics, druids, and warlocks, can cast spells, which are magical effects with specific rules and outcomes.
PostgreSQL by Ciro Santilli 37 Updated 2025-07-16
Had a look at the source tree, and also felt good.
If Oracle is the Microsoft of database, Postgres is the Linux, and MySQL (or more precisely MariaDB) is the FreeBSD (i.e. the one that got delayed by legal issues). Except that their software licenses were accidentally swapped.
The only problem with Postgres is its name. PostgreSQL is so unpronounceable and so untypeable that you should just call it "Postgres" like everyone else.

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 5. . 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.
  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