"Unnatural Selection" is an independent video game developed by Midian Design, released in 1999. It is a real-time strategy game that employs a unique blend of themes involving genetics, evolution, and survival. Players take on the role of a creature that must adapt and evolve through natural and unnatural means to survive various challenges and threats in its environment. The gameplay typically involves managing resources, evolving traits, and engaging in combat with other creatures or players.
In computational anatomy, Riemannian metrics and Lie brackets are important concepts used to analyze and model the shapes and structures of anatomical objects, such as biological forms and organ shapes. Let's explore both concepts: ### Riemannian Metric A **Riemannian metric** is a mathematical structure that defines the way distances and angles are measured on a manifold, which can be thought of as a generalized space that can have curved geometry.
Authentication is the process of verifying the identity of a user, device, or system to ensure that they are who they claim to be. It is a critical component of security protocols in various fields, including computing, networking, and information security. The primary goal of authentication is to protect systems and data from unauthorized access and to ensure that sensitive information is only accessible to authorized users.
MultiOTP is an open-source software solution designed for implementing two-factor authentication (2FA) and multi-factor authentication (MFA). It allows users to enhance the security of online services and applications by requiring an additional verification step beyond just a username and password.
Prêt à Voter is a French term that translates to "Ready to Vote" in English. It typically refers to an initiative or platform designed to facilitate the voting process, making it more accessible and straightforward for voters. This could include providing information about voting procedures, offering resources for understanding candidates and issues, or even digital tools that help with the voting process itself.
Radiofrequency Measurement and Signature Intelligence (RF MASINT) is a specialized form of intelligence collection and analysis focused on electromagnetic emissions, particularly in the radiofrequency spectrum. MASINT itself stands for Measurement and Signature Intelligence, which encompasses a broad array of technical intelligence that is obtained through the measurement of physical phenomena or signatures, as opposed to traditional intelligence sources such as Human Intelligence (HUMINT) or signals intelligence (SIGINT).
KISS (Keep It Simple, Stupid) is a principle that suggests that systems and methods should be kept as simple as possible. In the context of cryptanalysis, the term is often applied to the idea that cryptographic systems should be designed with simplicity in mind to avoid vulnerabilities and reduce the risk of implementing complex algorithms. While KISS itself is not a specific technique in cryptanalysis, its philosophy emphasizes that overly complicated cryptographic schemes can lead to errors and security flaws.
Cryptologic education refers to the study and training related to cryptology, which encompasses both cryptography (the practice and study of techniques for secure communication) and cryptanalysis (the art of breaking cryptographic codes). This type of education prepares individuals to understand, create, and analyze secure communication systems, as well as to protect information from unauthorized access.
Public-key cryptography, also known as asymmetric cryptography, is a cryptographic system that uses a pair of keys for secure communication: a public key and a private key. These keys are mathematically related but serve different purposes. 1. **Public Key**: This key is shared openly and can be distributed to anyone. It is used to encrypt messages or verify digital signatures. 2. **Private Key**: This key is kept secret by the owner.
Crypto-PAn (Cryptographic Prefix-Aware Network Address Translator) is a privacy-preserving technique designed to anonymize IP addresses while allowing some level of network functionality, particularly in scenarios like peer-to-peer networking. It was developed to address concerns about IP address tracking and privacy in online communications. Key features of Crypto-PAn include: 1. **Prefix-aware**: It modifies IP addresses in a way that maintains the structure needed for routing while still providing anonymity.
Chalcogen bonds are non-covalent interactions that occur between a chalcogen atom (typically sulfur, selenium, tellurium, or polonium) and a nucleophilic atom or group, such as oxygen, nitrogen, or carbon. These interactions are analogous to hydrogen bonds but involve heavier and more polarizable elements.
Covalent bonds can be classified based on a variety of criteria, including the types of atoms involved, the nature of the bonding electrons, and the bond's characteristics. Here are some common methods of classification: 1. **Based on the Composition of Atoms:** - **Single Covalent Bond:** Involves the sharing of one pair of electrons between two atoms (e.g., H₂, Cl₂).
The "double bond rule" typically refers to a guideline in organic chemistry concerning the formation of covalent bonds, particularly in relation to how carbon and other elements can form multiple bonds between atoms. Here are the key features of the double bond rule: 1. **Definition of Double Bonds**: A double bond occurs when two pairs of electrons are shared between two atoms. This is often represented in chemical structures as two lines connecting the bonded atoms (e.g.
Intermolecular forces are the forces of attraction or repulsion that occur between neighboring particles (atoms, molecules, or ions) in a substance. These forces play a crucial role in determining the physical properties of substances, such as boiling and melting points, vapor pressures, and solubility.
Ioliomics is a term that refers to the study and analysis of the interactions and relationships between the various ionic species in biological systems. This field typically involves understanding how different ions, such as sodium, potassium, calcium, magnesium, and others, influence cellular processes, physiological functions, and overall health. The term "ioliomics" can also encompass the study of ionic changes in response to environmental factors, disease states, or therapeutic interventions.
An isopeptide bond is a type of covalent bond that forms between the carboxyl group of one amino acid and the amino group of another amino acid, specifically when the bond occurs between the side chain of one amino acid (usually one possessing a reactive group such as lysine or aspartic acid) and the backbone or side chain of another amino acid.
Network covalent bonding is a type of chemical bonding that occurs when atoms are connected to each other through covalent bonds in a continuous, three-dimensional network. This type of bonding results in the formation of large structures where each atom is bonded to several adjacent atoms, creating a rigid and stable arrangement.
The octet rule is a chemical principle that states that atoms tend to bond in such a way that they each have eight electrons in their valence shell, similar to the electron configuration of noble gases. This rule is based on the observation that atoms are more stable when they have a full outer shell of electrons.
Valence electrons are the electrons in the outermost shell (or energy level) of an atom that are involved in chemical bonding and reactions. These electrons are crucial because they determine how an atom interacts with other atoms, influencing the formation of bonds in molecules and compounds. The number of valence electrons varies among different elements and can be determined by the group number in the periodic table. For example, elements in Group 1 have one valence electron, while those in Group 17 have seven.
Nuclear technology refers to the use of nuclear reactions and processes for a variety of applications. It can be broadly categorized into two main areas: nuclear energy and nuclear applications in various fields such as medicine, agriculture, and industry. Here are the key aspects of nuclear technology: ### 1. Nuclear Energy - **Nuclear Power Generation**: Nuclear reactors use controlled nuclear fission reactions to generate heat, which is then used to produce steam that drives turbines to generate electricity.

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