A membrane osmometer is a scientific instrument used to measure osmotic pressure, which is the pressure required to stop the flow of solvent across a semipermeable membrane due to osmosis. Osmosis is the movement of solvent molecules (usually water) from a region of lower solute concentration to a region of higher solute concentration through a semipermeable membrane.
A polymer brush is a thin layer of polymer chains anchored at one end to a solid surface or interface, with the other ends extending into the surrounding medium, which can be a liquid or gas. This configuration creates a "brush-like" appearance, as the polymer chains protrude outward and can form a dense array. Polymer brushes are significant in various fields, including materials science, biology, and nanotechnology, due to their unique properties and functionalities.
Conjugated Microporous Polymers (CMPs) are a class of organic polymers characterized by their conjugated structure, which includes alternating single and double bonds throughout their molecular framework. This unique structure imparts certain electronic and optical properties to the material, making CMPs interesting for various applications in fields such as gas adsorption, separation, and catalysis.
The Klinkenberg correction is a method used in the field of porous media science, particularly in the study of gas permeability in porous materials such as rocks and soils. It addresses the effects of gas slip, which can occur when the mean free path of gas molecules is comparable to the pore size in the material being studied.
A porous medium is a material that contains pores (voids or spaces) in its structure, allowing for the movement of fluids (liquids or gases) through it. The presence of these pores can significantly influence the physical, chemical, and biological properties of the medium. Porous media can be found in various natural and synthetic materials, including soil, rock, concrete, sponges, and certain types of filters.
Radiation health effects refer to the biological consequences that result from exposure to ionizing radiation. Ionizing radiation has enough energy to remove tightly bound electrons from atoms, which can lead to cellular damage, mutations, and, in severe cases, death. The effects of radiation exposure can vary based on factors such as the type and amount of radiation, duration of exposure, the route of exposure, and the individual's sensitivity.
Radiation chemistry is a branch of chemistry that studies the chemical effects of ionizing radiation on matter. This includes the examination of how radiation interacts with various substances, leading to the formation of new chemical species and changes in chemical properties. Ionizing radiation encompasses high-energy particles such as alpha particles, beta particles, gamma rays, and X-rays.
Radiation pressure is the pressure exerted by electromagnetic radiation on a surface. It occurs because radiation carries momentum, and when it is absorbed, reflected, or transmitted by an object, it transfers some of this momentum to that object, resulting in a force.
Macalloy is a company that specializes in the design and manufacture of advanced tensioning and structural systems, primarily for construction and engineering applications. Founded in the UK, Macalloy is known for its innovative products, particularly in the field of pre-stressing and post-tensioning systems, which are used to enhance the strength and durability of concrete structures. Their product range includes tension rods, cables, and associated hardware that are utilized in various applications such as bridges, buildings, and other infrastructure projects.
A hurdle model is a type of statistical model used to analyze and describe count data that are characterized by an excess of zeros. It is particularly useful in situations where the response variable is zero-inflated, meaning that there are more zeros than would be expected under a standard count data distribution (e.g., Poisson or negative binomial).
A Land Use Regression (LUR) model is a statistical method used to estimate the concentration of air pollutants or other environmental variables across geographical areas based on land use and other spatial data. The core idea behind LUR is that land use types and patterns—such as residential, commercial, industrial, agricultural, and green spaces—can significantly influence environmental variables like air quality.
Response modeling methodology refers to a set of techniques and practices used to analyze and predict how different factors influence an individual's or a group's response to specific stimuli, such as marketing campaigns, product launches, or other interventions. This methodology is common in fields like marketing, finance, healthcare, and social sciences, where understanding and predicting behavior is crucial for decision-making. ### Key Components of Response Modeling Methodology: 1. **Data Collection**: - Gathering relevant data from various sources.
Whittle likelihood is a statistical method used for estimating parameters in time series models, particularly those involving Gaussian processes and stationary time series. It is named after Peter Whittle, who introduced this likelihood approach. The Whittle likelihood is based on the spectral properties of a time series, specifically its power spectral density (PSD). The key idea is to use the Fourier transform of the data to facilitate parameter estimation.
The Glossary of Unified Modeling Language (UML) terms provides definitions and explanations of key concepts and terminology used in UML, which is a standardized modeling language used in software engineering to visualize, specify, construct, and document the artifacts of a software system. Here are some important UML terms from the glossary: 1. **Model**: A representation of a system, or some aspect of a system, that abstracts away details to focus on certain features or characteristics.
ObjecTime Developer is a modeling and development environment designed for creating real-time and embedded systems applications. It provides tools that facilitate the design, analysis, and implementation of systems that must operate within strict timing and performance constraints. Key features of ObjecTime Developer include: 1. **Unified Modeling Language (UML) Support**: It uses UML for specifying system design, which helps in visualizing the architecture and components of the system.
QVT stands for "Query/View/Transformation," and it is a specification language used in model-driven engineering (MDE), particularly in the context of the Object Management Group (OMG). QVT is designed for transforming models from one form to another and consists of three main components: 1. **Query**: This part allows users to define queries that can retrieve information from models. It serves as a way to extract specific data or elements from a given model.
Telelogic was a software company that specialized in tools for systems and software development, particularly in the areas of requirements management, model-based development, and software configuration management. It was known for its flagship products such as DOORS, a tool for requirement management, and Tau, a modeling tool for real-time and embedded systems. Telelogic focused on helping organizations improve their software and systems development processes by providing tools that supported methodologies like UML (Unified Modeling Language) and systems engineering practices.
Umple is an open-source modeling language and software development framework used to create and maintain software applications. It focuses on integrating modeling and programming by allowing developers to define data models and behaviors in a high-level, concise manner. Umple combines aspects of object-oriented programming with a modeling approach, enabling users to specify classes, associations, state machines, and other constructs directly in the code.
Visual modeling is a technique used to represent and communicate complex information or systems through visual diagrams and graphical representations. It simplifies understanding by converting abstract concepts, processes, or data into visual formats, making it easier for individuals or teams to analyze, design, and communicate ideas.
Experimental uncertainty analysis is a process used in scientific experimentation to quantify and evaluate the uncertainties associated with measurement results. It involves identifying and estimating the various sources of uncertainty that can affect the precision and accuracy of experimental data. Here are some key components and steps involved in experimental uncertainty analysis: 1. **Identification of Uncertainties**: Researchers identify potential sources of uncertainty in their experiments. This can include instrumental errors, environmental conditions, systematic errors, and human factors.

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