The Continuum Structure Function is commonly referenced in the context of quantum field theory, particularly in studies involving non-perturbative aspects of quantum chromodynamics (QCD), though the term can also apply broadly in other fields such as statistical mechanics and condensed matter physics. In quantum field theory, structure functions are used to describe the distribution of energy, momentum, or other physical quantities among the constituents of a system.
The proportional hazards model, often referred to as Cox proportional hazards model, is a type of regression model commonly used in survival analysis. It is primarily designed to examine the effect of various predictors or covariates on the time it takes for a particular event to occur, such as death, failure, or any other time-to-event outcome.
The log-logistic distribution is a continuous probability distribution used in statistics and reliability analysis. It is particularly useful for modeling the distribution of positive random variables, especially in contexts where the data exhibits a skewed distribution and has a long right tail. The log-logistic distribution is often employed in survival analysis and economics. ### Definition: A random variable \(X\) follows a log-logistic distribution if its logarithm, \(\log(X)\), follows a logistic distribution.
The Logrank test is a statistical hypothesis test used to compare the survival distributions of two or more groups. It is commonly used in the context of clinical trials, epidemiology, and survival analysis to determine if there are significant differences in the survival times of different groups, such as treatment versus control groups.
Personal transporters are compact, portable vehicles designed for individual use to facilitate personal mobility. They typically include devices that operate on electronic and often battery-powered systems. Common examples of personal transporters include: 1. **Electric scooters**: These are two-wheeled vehicles powered by electric motors, allowing users to easily navigate urban environments. 2. **Segways and hoverboards**: Segways use a self-balancing mechanism, whereas hoverboards are platform-style devices that also operate through balancing techniques.
Avy B.V. is a company based in the Netherlands that specializes in unmanned aerial vehicles (UAVs), commonly known as drones. The company focuses on developing advanced drone technology, particularly for applications in various sectors such as logistics, agriculture, and environmental monitoring. Avy's drones are designed to be efficient and environmentally friendly, often emphasizing features like long endurance, vertical take-off and landing (VTOL), and the ability to carry various payloads.
ET3 Global Alliance refers to an initiative focused on the development and implementation of a high-speed transportation system known as ET3, which stands for "Elevated, Transport, Technology, and Energy." The concept involves using a network of elevated tubes to transport passengers and cargo at high speeds, potentially reaching speeds of up to 300 miles per hour or more, using a vacuum environment to reduce air resistance.
The effects of cars can be examined from various perspectives, including environmental, economic, social, and health-related aspects. Here are some key effects of cars: ### Environmental Effects 1. **Air Pollution**: Cars emit pollutants such as carbon monoxide (CO), nitrogen oxides (NOx), and volatile organic compounds (VOCs), contributing to poor air quality and respiratory issues.
Flexicar is a car-sharing service that allows users to rent cars on a flexible, short-term basis. This service is part of the broader trend of car-sharing and mobility services, which provide an alternative to traditional car ownership. Flexicar typically enables users to access a variety of vehicles, from compact cars to larger models, based on their needs at any given time.
The ergodic hypothesis is a concept from statistical mechanics and dynamical systems that relates to the long-term behavior of a dynamical system. It asserts that, under certain conditions, the time average of a physical quantity is equal to the ensemble average (or spatial average) over the state space of the system.
The Innovative Clean Transit (ICT) rule is a regulatory measure implemented by the California Air Resources Board (CARB). It aims to facilitate the transition of public transit agencies to zero-emission bus fleets. The rule was finalized in 2018 and supports California's broader goals of reducing greenhouse gas emissions and improving air quality.
Plan Bay Area is a long-range regional planning effort that aims to accommodate growth in the San Francisco Bay Area while promoting sustainability, equity, and economic development. Developed by the Association of Bay Area Governments (ABAG) and the Metropolitan Transportation Commission (MTC), Plan Bay Area includes strategies for land use, transportation, and housing over a 30-year horizon.
A walking audit, also known as a walkability audit, is an assessment tool used to evaluate the pedestrian-friendliness of a particular area or neighborhood. It involves physically walking through a designated area and observing various factors that impact the experience of pedestrians. The goal of a walking audit is to identify both strengths and weaknesses in the environment for walkers, which can then inform urban planning, community development, and policy decisions.
The Sustainable Communities and Climate Protection Act of 2008, also known as Senate Bill 375 (SB 375), is a piece of legislation enacted in California aimed at reducing greenhouse gas emissions from automobiles and light trucks, as well as promoting sustainable land use and transportation planning. The act is part of California's broader efforts to combat climate change and encourage more sustainable environmental practices.
Tactical urbanism refers to a set of low-cost, temporary interventions designed to improve urban spaces and engage communities in the process of urban planning and design. These activities often aim to address specific urban issues, enhance public spaces, and promote livability in a short time frame, typically through pilot projects or community-led initiatives.
Transit-oriented development (TOD) refers to a type of urban development that aims to maximize access to public transportation, particularly rail and bus services, while minimizing reliance on automobiles. The key components of TOD include compact, mixed-use neighborhoods that are designed to facilitate easy access to transit stations, promote walkability, and encourage the use of public transport.
Conny Palm is a classic palm tree, scientifically known as **Howea forsteriana**. It is commonly called the Kentia palm and is native to Lord Howe Island in Australia. Conny palms are known for their graceful, arching fronds and elegant appearance, making them popular as ornamental houseplants and landscape trees in tropical and subtropical regions. These palms can grow indoors and outdoors and are appreciated for their hardiness and ability to thrive in various light conditions.
Sweden has a rich history of female mathematicians who have made significant contributions to mathematics and related fields. Here are a few notable Swedish women mathematicians: 1. **Emmy Noether (1882-1935)** - Although born in Germany, Emmy Noether is often associated with Sweden due to her work being influential in many countries, including her time spent in the U.S. during her later years. She is known for her groundbreaking contributions to abstract algebra and theoretical physics.
Johan Wilcke is not widely recognized in popular culture or historical accounts, and there is no notable information available about an individual by that name as of my last knowledge update in October 2023. It is possible that he is a private individual, a relatively unknown figure, or a character in a lesser-known work.
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!
Intro to OurBigBook
. Source. We have two killer features:
- 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-calculusArticles 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/derivativeVideo 2. OurBigBook Web topics demo. Source. - 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.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
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. - Infinitely deep tables of contents:
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





