The Palermo Technical Impact Hazard Scale (THIS) is a scale used to assess the potential risk that near-Earth objects (NEOs) pose to our planet. Developed to classify the impact hazard associated with asteroids and comets, the scale helps in determining the likelihood and potential consequences of an object's collision with Earth. The Palermo Scale ranges from negative to positive values, with negative values indicating an object has a low probability of impacting Earth and positive values indicating heightened risk.
In economics, heterogeneity refers to the presence of diverse and varied characteristics or behaviors within a particular group, market, or economic system. This concept contrasts with homogeneity, where entities within a group share similar traits or properties. Heterogeneity can manifest in various forms, such as: 1. **Consumer Preferences**: Different consumers have unique preferences, incomes, and purchasing power, which affect their choices and demand for goods and services.
Spectral flatness is a measure used in signal processing and audio analysis to quantify how flat or noise-like a given spectrum is. It provides insight into the characteristics of a sound signal, differentiating between tonal sounds (like musical notes) and noise-like sounds. ### Definition: Mathematically, spectral flatness can be defined as the ratio of the geometric mean to the arithmetic mean of the power spectrum of a signal.
The Berlekamp–Welch algorithm is a mathematical algorithm used for error correction in coding theory, particularly in the context of Reed-Solomon codes. It is designed to efficiently decode received polynomial data that may have been corrupted by errors during transmission.
Bipolar violation typically refers to a situation in electrical engineering and telecommunications where a signal that is expected to alternate between two distinct states (commonly represented as positive and negative, or high and low) fails to do so appropriately. This can occur in systems using bipolar encoding, where the signal is represented using both positive and negative voltages. In a correctly functioning bipolar system, the signal should alternate between positive and negative voltages in a way that maintains an even distribution of these states.
Induction on regular languages typically refers to using mathematical induction to prove properties about regular languages or to establish algorithms and methods for working with these languages. Regular languages are those that can be represented by finite automata, regular expressions, or generated by regular grammars.
Impedance measurements refer to the assessment of an electrical component's or circuit's impedance, which is a measure of how much it resists the flow of alternating current (AC) at a specific frequency. Impedance is a complex quantity, denoted as \( Z \), that combines both resistance (real part) and reactance (imaginary part).
Informatics is an interdisciplinary field that focuses on the study, design, and development of systems for storing, retrieving, and processing information. It integrates concepts from computer science, information science, and various domain-specific areas to address challenges related to information management and technology. Key aspects of informatics include: 1. **Data Management**: How data is collected, organized, stored, and retrieved. This involves database management, data mining, and big data analytics.
Computational Materials Science is a scientific journal that focuses on the application of computational methods and techniques to study materials properties and behaviors. The journal publishes original research articles, reviews, and technical notes that contribute to the understanding of materials through computational approaches, including but not limited to: 1. **Molecular Dynamics Simulations**: Studying the physical movements of atoms and molecules. 2. **Density Functional Theory (DFT)**: Quantum mechanical modeling methods used to investigate the electronic structure of materials.
Pattern recognition is a field within artificial intelligence (AI) and machine learning that focuses on identifying and classifying shapes, trends, or regularities in data. It involves the detection of patterns and regularities in data sets, which can be in the form of images, audio, text, and other types of signals. Key components of pattern recognition include: 1. **Feature Extraction**: Identifying and selecting the significant attributes or features from raw data that will be used for classification or recognition.
Stylometry is the quantitative analysis of writing style. It involves the use of statistical methods and computational techniques to analyze the characteristics of written texts. Stylometric analysis often focuses on various features of the text, such as word frequency, sentence length, punctuation use, and other linguistic patterns.
Voice computing refers to the technology and systems that enable devices to recognize, interpret, and respond to spoken language. It encompasses a variety of technologies and applications that use voice as the primary interface for interaction, allowing users to communicate with devices without needing to engage with traditional input methods like keyboards or touchscreens. Here are some key aspects of voice computing: 1. **Voice Recognition**: This is the ability of a system to understand and process human speech.
Bioz is a technology company that focuses on improving the process of scientific research and experimentation by leveraging artificial intelligence and machine learning. Its primary product is a platform that helps researchers find and utilize life sciences and biomedical research products, such as reagents, protocols, and instruments, by providing data-driven recommendations and insights. The Bioz platform aggregates data from a wide range of scientific publications, extracting information about various research products and their performance in experiments.
The Avoider-Enforcer game is a concept in game theory that describes interactions between two types of players: the Avoider and the Enforcer. This game typically takes place in a geometric setting, often within a bounded space like a two-dimensional plane. ### Key Concepts: 1. **Roles**: - **Avoider**: The goal of the Avoider is to avoid being captured or restricted by the Enforcer.
József Beck is a Hungarian mathematician known for his contributions to various areas of mathematics, including probability theory, statistics, and mathematical analysis. He has authored numerous research papers and has been involved in teaching and mentoring students in the field.
A permutation group is a mathematical concept in group theory that consists of a set of permutations of a given set combined with the operation of composition. Here's a more detailed breakdown of the concept: 1. **Permutations**: A permutation of a set is a rearrangement of its elements. For a finite set with \( n \) elements, a permutation is simply a bijective function from the set to itself.
An Error Correction Model (ECM) is a type of econometric model used to represent the short-term dynamics of a time series while ensuring that long-term equilibrium relationships between variables are maintained. It is particularly useful in the context of cointegrated time series data, where two or more non-stationary time series move together over time, implying a long-run equilibrium relationship between them.
Go-Back-N ARQ (Automatic Repeat reQuest) is an error control protocol used in computer networks and data communications. It is a type of sliding window protocol that allows multiple frames to be sent before needing an acknowledgment for the first frame, which increases the efficiency of data transmission. ### Key Features of Go-Back-N ARQ: 1. **Sliding Window Protocol**: The protocol utilizes a sliding window to manage the sequence of frames being sent.
Locally testable code refers to a concept in software development and programming that emphasizes the ability to verify or "test" components of code independently and in isolation from the rest of the system. The goal of locally testable code is to ensure that individual parts of the program can be tested without requiring the entire application to be executed or without needing extensive setups or dependencies.

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