Traian Brăileanu is a notable figure in Romanian history, primarily recognized for his contributions as a sociologist, educator, and politician. He was born in 1895 and is known for his involvement in the intellectual and political life of Romania during the 20th century. Brăileanu was associated with various sociological theories and practices, and he played a significant role in the development of sociology as a discipline in Romania.
A dehumidifier is an electrical device designed to reduce and maintain the level of humidity in the air. By drawing in moist air, it removes excess moisture, which can help to prevent the growth of mold and mildew, alleviate allergens, and enhance overall indoor comfort. Dehumidifiers work by passing air over cold coils, which condenses moisture from the air. The condensed water is collected in a reservoir or drained away through a hose, while the drier air is circulated back into the room.
A home appliance is a device or machine that aids in domestic tasks, typically used for household functions such as cooking, cleaning, food preservation, and laundry. Home appliances can be categorized into two main types: 1. **Major Appliances (White Goods):** These are large, often stationary machines that perform significant household tasks.
A leaf blower is a gardening tool that uses a motor to generate a stream of air strong enough to move leaves, grass clippings, and other debris. It is commonly used to clear lawns, driveways, sidewalks, and gardens of fallen leaves and other lightweight organic matter. Leaf blowers can be powered by electricity, batteries, or gas and come in various designs, including handheld models, backpack types, and more powerful tow-behind versions.
Moffat is a company that specializes in manufacturing equipment for the food service industry. They produce a wide range of products, including ovens, cookers, and other kitchen appliances designed for commercial use. Moffat is known for its innovative designs and high-quality products that cater to the needs of restaurants, catering businesses, and other food service operations. The company has a strong presence in various international markets and is recognized for its commitment to reliability and efficiency in kitchen equipment.
A small appliance is a portable or semi-portable device that is used to perform a specific task in the home, mostly related to cooking, food preparation, cleaning, or personal care. Unlike larger appliances like refrigerators, ovens, or washing machines, small appliances are typically designed to be lightweight and easy to use, often requiring little to no installation.
"Bump and hole" is a term that can have different meanings depending on the context, but it is often associated with construction, civil engineering, or road maintenance, referring to an issue related to road surfaces. When roads develop bumps and holes (or potholes), it can lead to uneven driving surfaces that can be dangerous for vehicles and pedestrians. In a more technical sense, "bump" refers to elevated areas on a surface, while "hole" refers to depressions.
Sobolev mapping refers to the concept of mappings (or functions) between two spaces that belong to Sobolev spaces, which are a class of function spaces that consider both the functions and their weak derivatives.
The Steenrod problem, named after mathematician Norman Steenrod, refers to a question in the field of algebraic topology concerning the properties and structure of cohomology operations. Specifically, it deals with the problem of determining which cohomology operations can be represented by "natural" cohomology operations on spaces, particularly focusing on the stable homotopy category.
A **model category** is a concept from category theory, which is a branch of mathematics that deals with abstract structures and relationships between them. Specifically, a model category provides a framework for doing homotopy theory in a categorical setting. It allows mathematicians to work with "homotopical" concepts such as homotopy equivalences, fibrations, and cofibrations in a systematic way.
Hand tools are tools that are operated by hand, as opposed to being powered by electricity or other sources of energy. They are essential in a variety of trades and crafts, including construction, woodworking, metalworking, gardening, and more. Hand tools can be simple or complex and are often used for tasks such as cutting, shaping, drilling, fastening, and measuring. Common examples of hand tools include: 1. **Hammers** - Used for driving nails or breaking objects.
János Halász is a Hungarian politician known for his involvement in the political landscape of Hungary. He is a member of the Fidesz party, which is a major center-right political party in Hungary, often associated with nationalist and conservative policies. Halász has served in various capacities within the party and has also held positions in the Hungarian National Assembly. His political career includes work on issues related to education, culture, and social policies, among others.
János Hebling is a Hungarian physicist known for his research in the fields of laser technology, photonics, and nanotechnology. He has contributed to various scientific advancements and has been involved in multiple academic and research institutions. His work often focuses on the development of new optical devices and materials, as well as their applications in various technologies.
Isotope hydrology is a branch of hydrology that focuses on the study of the isotopic composition of water to better understand various hydrological processes. It involves the use of stable and radioactive isotopes of elements like hydrogen, oxygen, carbon, and others to investigate water sources, movement, and interactions within the hydrological cycle.
"Leat" can refer to different things depending on the context: 1. **Watercourse**: In historical and geographic contexts, a "leat" is a water channel or conduit used for irrigation, typically to divert water from a river or stream to fields or mills. It is often associated with traditional farming and milling practices.
MIKE FLOOD is a software tool developed by DHI, designed for flood modeling and management. It is part of the MIKE by DHI series of software products that focus on various aspects of water-related challenges. MIKE FLOOD integrates different modeling components to simulate the behavior of water in both urban and rural environments during flood events.
"Omega Hydraulic Diggings" may refer to a specific location or historical mining site, often associated with hydraulic mining techniques. Hydraulic mining was a method used in the 19th century, particularly during the Gold Rushes in places like California, where high-pressure water jets were employed to dislodge rock and soil to extract gold and other minerals. If "Omega Hydraulic Diggings" is a specific site, it might be associated with mining history, showing where such techniques were applied.
John Cocke (1924–2021) was a prominent American computer scientist known for his pioneering work in computer architecture and compiler design. He made significant contributions to the field during the mid-20th century, particularly in the development of techniques that optimize the performance of computer programs. One of Cocke's most notable contributions is the concept of the **RISC (Reduced Instruction Set Computing) architecture**, which he helped to develop at IBM in the 1970s.
Peter Lucas is a computer scientist known for his work in the field of computer programming, software engineering, and artificial intelligence. He has contributed to various areas such as programming languages, compilers, and automated reasoning. One notable aspect of his research is the development of tools and methods for improving software reliability and maintainability. In addition, he may also have been involved in education and academic contributions, possibly authoring textbooks or papers in his areas of expertise.
Ice yachting, also known as ice sailing, is a winter sport that involves racing specially designed sailboats or yachts on frozen bodies of water, such as lakes or rivers. These boats, called ice yachts or iceboats, are equipped with runners (sharp blades) instead of traditional keels and are built to glide over the ice. **Key features of ice yachting include:** 1.

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