Freenex is an online service or community that provides free access to a variety of resources, tools, or platforms, typically focused on open-source software or the promotion of certain projects. It may also specifically refer to a network within the context of internet relay chat (IRC) where users can connect and interact over various topics.
Andrea Bertozzi is a prominent American mathematician known for her work in applied mathematics, particularly in the fields of nonlinear partial differential equations, fluid dynamics, and mathematical modeling in biological systems. She has made significant contributions to areas such as image processing, pattern formation, and mathematical biology. Bertozzi has also been involved in interdisciplinary research, collaborating with scientists and researchers from various fields to apply mathematical principles to real-world problems.
In the context of differential geometry and algebraic geometry, a **P-basis** typically refers to a basis for a vector space that is relevant to a particular property or structure denoted by "P." The term can have different meanings depending on the specific field or application; for instance: 1. **In Linear Algebra**: A P-basis could refer to a basis of a module or vector space that fulfills certain properties defined by "P.
Duplex sequencing is an advanced DNA sequencing technology that enhances the accuracy of genome sequencing by resolving common types of errors encountered in traditional sequencing methods. This technique is particularly useful for applications such as detecting mutations in complex or repetitive genomic regions. The key feature of duplex sequencing is that it utilizes both strands of a DNA molecule.
EIF2, or eukaryotic translation initiation factor 2, is a critical protein that plays a key role in the initiation of protein synthesis (translation) in eukaryotic cells. It is involved in the formation of the translation initiation complex, which is required for ribosomes to initiate protein synthesis at the start codon of mRNA.
Nuclear decommissioning is the process of safely closing and dismantling a nuclear power plant or facility once it has reached the end of its operational life or has been shut down for other reasons. The objective of decommissioning is to manage the removal of radioactive materials and ensure that the site can be restored for other uses or remain safe for the public and the environment.
A nuclear depth bomb, often referred to as a "depth charge," is a type of explosive weapon designed to detonate underwater, specifically targeting submarines or naval mines. While depth charges primarily use conventional explosives, the term "nuclear depth bomb" can also refer to a version that employs a nuclear warhead. **Key Features:** 1.
Nuclear energy in Tanzania is an emerging area of interest as the country explores ways to diversify its energy sources and enhance its energy security. As of my last knowledge update in October 2023, Tanzania had begun studying the possibility of developing nuclear energy capabilities, primarily through the establishment of a nuclear power program.
The Nuclear Fuel Cycle Information System (NFCIS) refers to a comprehensive framework for collecting, analyzing, and disseminating information regarding the entire nuclear fuel cycle, which encompasses all stages of nuclear fuel production, use, and management. This cycle typically includes: 1. **Uranium Mining and Milling**: The extraction of uranium ore from the earth and its conversion into uranium concentrate (yellowcake).
Electroblotting is a laboratory technique used to transfer proteins or nucleic acids from a gel (usually after electrophoresis) to a membrane, such as nitrocellulose or PVDF (polyvinylidene difluoride). This method is essential in molecular biology and biochemistry for the analysis and detection of specific biomolecules.
Backcasting is a strategic planning method used to envision a desired future and then work backward to identify the steps necessary to achieve that future. Unlike forecasting, which extrapolates trends from the present into the future, backcasting starts with a specific goal or vision and determines what actions need to be taken to reach that endpoint. The process typically involves the following steps: 1. **Define the Future Goal**: Clearly articulate the desired future state or outcome.
Electroporation is a biophysical technique used to increase the permeability of cell membranes by applying an external electric field. This process involves applying short bursts of high-voltage electric pulses to cells, which creates temporary pores in the cell membrane. These pores allow for the introduction of various substances into the cells, including DNA, RNA, proteins, drugs, and other molecules.
Nuclear Magnetic Resonance (NMR) Crystallography is a hybrid technique combining elements of nuclear magnetic resonance spectroscopy and crystallography to determine the three-dimensional structures of biomolecules, particularly proteins and nucleic acids, in their crystalline states. ### Key Aspects of NMR Crystallography: 1. **Nuclear Magnetic Resonance (NMR)**: - NMR is a powerful analytical technique that exploits the magnetic properties of atomic nuclei.
China has several prominent companies involved in the development, construction, and operation of nuclear power plants. Here are some of the key players in the Chinese nuclear power industry: 1. **China National Nuclear Corporation (CNNC)**: CNNC is one of the largest state-owned enterprises that develops and operates nuclear power plants in China. It is involved in the entire nuclear fuel cycle, including uranium mining, fuel fabrication, nuclear power generation, and waste management.
As of my last update in October 2023, the Netherlands has a limited number of nuclear power stations. The country operates one active nuclear power plant: the Borssele Nuclear Power Station, located in the southwestern part of the Netherlands, near the village of Borssele in the province of Zeeland. Here are some key points about it: 1. **Borssele Nuclear Power Station**: - This plant is currently the only operational nuclear power facility in the Netherlands.
Nuclear regulatory organizations are governmental agencies responsible for regulating and overseeing the safe use of nuclear energy and materials. Their primary goal is to ensure the safety, security, and environmental protection associated with the use of nuclear technology. These organizations establish and enforce regulations, conduct inspections, and monitor compliance to prevent accidents and manage risks associated with nuclear activities.
Explained variation refers to the portion of the total variation in a dataset that can be attributed to a specific model or statistical relationship among variables. In other words, it measures how much of the variability in a dependent variable can be explained by one or more independent variables. In the context of regression analysis, for example, explained variation can be quantified through the coefficient of determination, commonly denoted as \( R^2 \).
Optimal design refers to the process of determining the most effective way to achieve specific objectives within a given set of constraints. This concept is widely used in various fields, including engineering, statistics, economics, and research design. The core idea is to find a design that maximizes or minimizes a particular function—often referred to as the objective function—while adhering to the limitations imposed by resources, conditions, or requirements.
Lasso, which stands for "Least Absolute Shrinkage and Selection Operator," is a statistical method used primarily in regression analysis. It is particularly useful for feature selection and regularization when dealing with a large number of predictors in a regression model. Here's an overview of its key characteristics: 1. **Regularization**: Lasso adds a penalty term to the ordinary least squares (OLS) regression cost function. This penalty is proportional to the absolute values of the coefficients of the predictors.
Pyrrho's lemma is a concept from probability theory, specifically related to the properties of random variables. It is named after the ancient Greek philosopher Pyrrho, who is known for his contributions to skepticism and the idea of certain knowledge. However, in the context of probability, it is more often related to the study of convergence and the behavior of random sequences.

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