Aircraft Meteorological Data Relay (AMDAR) is a system used for collecting and transmitting meteorological data from aircraft in flight. The primary purpose of AMDAR is to provide real-time atmospheric data to meteorological agencies and research institutions, which can enhance weather forecasting and climate monitoring.
The Aircraft Reactor Experiment (ARE) was a project developed by the United States in the late 1950s to explore the feasibility of using nuclear power for aircraft propulsion. Conducted by the Los Alamos National Laboratory and the Atomic Energy Commission, the primary objective of the experiment was to determine if a nuclear reactor could be designed for use in an aircraft engine and if it could provide sufficient thrust and power for sustained flight.
Trust anchor by Wikipedia Bot 0
A trust anchor is a critical component in a security framework, particularly in cryptography and network security. It serves as a foundational point of trust in a system that relies on digital certificates and public key infrastructure (PKI). Trust anchors are typically represented by a trusted public key or a certificate that is used to establish a chain of trust for digital communications and transactions.
Airfix by Wikipedia Bot 0
Airfix is a well-known British manufacturer of plastic model kits, primarily focusing on military vehicles, aircraft, ships, and figures. Founded in 1939 by Nicholas K. Churchill, the brand gained popularity for its detailed and historically accurate models that cater to hobbyists and collectors of all ages. Airfix kits come in various sizes and complexity levels, making them accessible for both beginners and experienced model builders.
Air traffic control (ATC) systems are essential components of the air transportation system, responsible for ensuring the safe and efficient movement of aircraft in the airspace and on the ground at airports. These systems assist pilots in navigating airspace, managing traffic, and preventing collisions. Here are the key aspects of air traffic control systems: ### 1.
SQL application by Ciro Santilli 37 Updated +Created
Airy disk by Wikipedia Bot 0
The Airy disk is a pattern of light observed when a point source of light, such as a distant star, is imaged through a circular aperture, such as a lens or an optical telescope. It occurs due to the diffraction of light, which causes waves to spread out when passing through the aperture. The Airy disk is characterized by a central bright spot, known as the Airy central maximum, surrounded by a series of concentric dark and bright rings.
MI1 by Wikipedia Bot 0
MI1, or Military Intelligence Section 1, was a section of British military intelligence that was responsible for gathering and analyzing intelligence regarding potential threats to British national security. It played a significant role during World War I and II, focusing on issues such as espionage and counterintelligence. The MI designation has been associated with various sections of British intelligence, including MI5 (domestic intelligence) and MI6 (foreign intelligence).
Ai Shōka by Wikipedia Bot 0
Ai Shōka (愛唱歌) typically refers to songs that are beloved or cherished, often showcasing deep emotional connections. The term is commonly used in Japanese to describe songs that are sung with affection or have special significance to an individual or a group. In a broader context, it can refer to a genre of music or songs that resonate on a personal level, frequently evoking nostalgia or deep feelings.
Aizerman's conjecture is a significant hypothesis in the field of control theory and linear systems. Proposed by M. Aizerman in the 1950s, the conjecture pertains to the stability of linear systems, particularly regarding the behavior of polynomial functions and their roots. Specifically, Aizerman's conjecture suggests that if a linear continuous-time system is stable for some feedback gain, then it remains stable for all feedback gains greater than that value.
Knowledge policy by Wikipedia Bot 0
Knowledge policy refers to a set of guidelines, principles, and practices that govern the creation, dissemination, and utilization of knowledge within an organization, community, or society. These policies are designed to ensure that knowledge is effectively managed and leveraged to enhance decision-making, innovation, and overall organizational performance. Below are some key components and considerations related to knowledge policy: 1. **Knowledge Management**: This involves strategies for capturing, storing, sharing, and utilizing knowledge assets.
Alain Goriely by Wikipedia Bot 0
Alain Goriely is a notable figure in the field of applied mathematics and mathematical modeling. He is known for his work in areas such as nonlinear mechanics, biomechanics, and mathematical biology. Goriely's research often focuses on understanding complex physical phenomena through mathematical frameworks and computational techniques. His contributions to the field include studies on elasticity, instability, and the mechanics of biological tissues, among other topics.
Alan Edelman by Wikipedia Bot 0
Alan Edelman is a prominent mathematician and computer scientist known for his work in scientific computing, numerical methods, and the development of the Julia programming language. He is a professor at the Massachusetts Institute of Technology (MIT) and has made significant contributions to the fields of numerical linear algebra and high-performance computing. Edelman is also recognized for his efforts in promoting open-source software and has been involved in various initiatives that bridge the gap between research and practical applications in coding and software development.
Alan Eppes by Wikipedia Bot 0
Alan Eppes is a fictional character from the television series "Numb3rs," which aired from 2005 to 2010. He is portrayed by actor Judd Hirsch. In the show, Alan is the father of the two main characters, Charlie Eppes, a mathematician, and Don Eppes, an FBI agent. Alan is depicted as a supportive parent who often provides wisdom and guidance to his sons as they navigate their complex lives and careers.
Gaetano Fichera by Wikipedia Bot 0
Gaetano Fichera is not widely known and may refer to multiple individuals, given that it is a personal name. However, the most notable Gaetano Fichera is an Italian mathematician recognized for his work in the fields of analysis and partial differential equations. He has published various papers and contributed to the mathematical community.
nodejs/sequelize/raw/parallel_update_async.js by Ciro Santilli 37 Updated +Created
nodejs/sequelize/raw/parallel_update_worker_threads.js contains a base example that can be used to test what can happen when queries are being run in parallel. But it is broken due to a sqlite3 Node.js package bug: github.com/mapbox/node-sqlite3/issues/1381...
nodejs/sequelize/raw/parallel_update_async.js is an async version of it. It should be just parallel enough to allow observing the same effects.
This is an example of a transaction where the SQL READ COMMITTED isolation level if sufficient.
These examples run queries of type:
UPDATE "MyInt" SET i = i + 1
Sample execution:
node --unhandled-rejections=strict ./parallel_update_async.js p 10 100
which does:
The fear then is that of a classic read-modify-write failure.
But as www.postgresql.org/docs/14/transaction-iso.html page makes very clear, including with an explicit example of type UPDATE accounts SET balance = balance + 100.00 WHERE acctnum = 12345;, that the default isolation level, SQL READ COMMITTED isolation level, already prevents any problems with this, as the update always re-reads selected rows in case they were previously modified.
If the first updater commits, the second updater will ignore the row if the first updater deleted it, otherwise it will attempt to apply its operation to the updated version of the row
Since in PostgreSQL "Read uncommitted" appears to be effectively the same as "Read committed", we won't be able to observe any failures on that database system for this example.
nodejs/sequelize/raw/parallel_create_delete_empty_tag.js contains an example where things can actually blow up in read committed.
Albert Marque by Wikipedia Bot 0
It seems there might be a misunderstanding or typo, as "Albert Marque" does not refer to any widely recognized individual or concept in popular knowledge up until October 2023. If you meant "Albert Marques," it could refer to various people, or you may be referring to a specific context (like literature, film, etc.).
Alberto Cattaneo by Wikipedia Bot 0
Alberto Cattaneo is a name that may refer to various individuals, but without specific context, it's difficult to narrow it down. One prominent figure associated with the name is an Italian neuroscientist known for his research in the field of neurobiology and synaptic communication.
Alberto O. Mendelzon was a prominent figure in the field of computer science, particularly known for his contributions to database theory and relational databases. He was a professor at the University of Toronto and made significant advancements in areas such as query languages and data modeling. Mendelzon is also known for his work on the foundations of databases, particularly involving the relational model and its applications. His research helped shape our understanding of how data can be structured, queried, and manipulated in databases.
Albert Schweitzer by Wikipedia Bot 0
Albert Schweitzer (1875–1965) was a German-French theologian, philosopher, physician, and Nobel Peace Prize laureate. He is best known for his work in several fields including theology, music, and medicine, as well as his philosophy of "Reverence for Life," which promotes an ethical approach to living that emphasizes respect for all living beings.

Pinned article: ourbigbook/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