Transport infrastructure encompasses the physical networks and facilities that enable the movement of people and goods. The development of transport infrastructure has evolved significantly over the centuries, reflecting changes in technology, economy, and societal needs. Below is a general overview of key developments in transport infrastructure by century: ### Ancient Times (Pre-1st Century AD) - **Roads and Paths**: Early road systems were developed by civilizations such as the Romans, who built extensive road networks throughout their empire (e.g.
Transport authorities are governmental or quasi-governmental organizations responsible for planning, regulating, and managing transportation systems and services within a specific jurisdiction. Their primary roles can include: 1. **Planning and Development**: Developing transportation policies and long-term plans to improve and expand infrastructure, such as roads, bridges, public transit systems, and airports. 2. **Regulation and Safety**: Establishing regulations to ensure the safety of transportation systems.
Constrictivity generally refers to the quality or condition of being constrictive. In various contexts, it can describe mechanisms, processes, or physiological states that involve narrowing or reducing the dimensions of a particular space or passageway. In the context of physiology, for example, constrictivity might refer to the ability of blood vessels or airways to constrict, affecting blood flow and airflow.
A glass breaker is typically a small, pointed tool designed to shatter glass quickly in emergency situations, enabling escape from vehicles or buildings. It is often part of safety equipment in cars, typically found in emergency hammers or seatbelt cutters. The glass breaker tip applies concentrated force on a small area of the glass, causing it to fracture and break.
Travel time reliability refers to the consistency and predictability of travel times over a given route or network. It is an important concept in transportation planning and traffic management, as it measures the extent to which actual travel times differ from expected travel times. Key aspects of travel time reliability include: 1. **Travel Time Variation**: This considers how travel times can fluctuate based on factors such as time of day, day of the week, weather conditions, and traffic incidents.
An oil additive is a chemical compound or mixture that is added to lubricating oil to enhance its properties and performance. These additives can improve various aspects of oil, such as its lubrication capabilities, stability, and resistance to oxidation and wear. Oil additives can be categorized into several groups, including: 1. **Detergents**: Help keep engine parts clean by preventing the formation of sludge and deposits.
Gunter Malle appears to be a less commonly known name and may not directly refer to a widely recognized figure or concept. It’s possible that Gunter Malle could be a person, a fictional character, or something specific in a niche context, but without additional context or details, it's difficult to provide precise information.
Extratropical cyclones are large-scale weather systems that form outside the tropics, typically in the mid-latitudes, where they are influenced by temperature contrasts between air masses. These cyclones are associated with fronts, which are boundaries between warm and cold air masses, and they usually develop along these fronts. Key characteristics of extratropical cyclones include: 1. **Structure**: They generally have a well-defined low-pressure center with a characteristic cold front and warm front extending from it.
A cubic mile is a unit of volume that measures the space occupied by a cube with each side measuring one mile long. In mathematical terms, it is calculated as: \[ \text{Cubic Mile} = \text{mile} \times \text{mile} \times \text{mile} = \text{mile}^3 \] To put it into perspective, one cubic mile is equivalent to about 4.168 billion cubic meters or about 1.101 billion gallons.
Megasonic cleaning is a process that uses high-frequency sound waves, typically in the range of 1 to 100 MHz (megahertz), to produce high-energy acoustic waves in a liquid cleaning solution. This technique is particularly effective for cleaning intricate and delicate parts and surfaces, including microelectronics, semiconductor wafers, and precision optical components. The process works by generating cavitation bubbles in the cleaning solution.
Model-Driven Engineering (MDE) is a software development approach that emphasizes the use of models as the primary artifacts throughout the software development lifecycle. It focuses on abstract representations of the system, which can be more easily understood and manipulated than the code itself. MDE promotes the idea that models can serve as a first-class element in software engineering, providing a higher level of abstraction when designing and implementing software systems.
UXF can stand for several things depending on the context, but in a technology or design context, it often refers to "User Experience Framework." This framework is used to guide the design and evaluation of user experiences in software, websites, and other digital products. It includes principles, best practices, and methodologies to enhance user satisfaction and interaction.
The Thompson uniqueness theorem, commonly associated with the field of functional analysis, specifically pertains to the uniqueness of continuous functions on certain domains. More precisely, it asserts that if two continuous functions defined on a compact space agree on a dense subset of that space, then they must agree on the entire space.
Pharmacoinformatics is an interdisciplinary field that combines pharmacology, bioinformatics, and computational science to improve drug discovery, design, development, and personalized medicine. It involves the use of computational tools and techniques to analyze biological and chemical data, enabling researchers to understand how drugs interact with biological systems at the molecular level.
Force spectroscopy is a technique used to study the mechanical properties of materials at the nanoscale by measuring the forces that arise during the interaction of a probe with a sample. It typically involves a sharp tip, often mounted on a cantilever, that interacts with a sample surface. The force exerted between the tip and the sample is measured as a function of distance, allowing researchers to obtain detailed information about the sample’s mechanical properties, such as elasticity, adhesion, and friction.
Philip Wolfe is an American mathematician known for his contributions to the fields of optimization and mathematical programming. He is particularly recognized for his work on convex analysis and linear programming. Wolfe is perhaps best known for the Wolfe duality theorem, which provides conditions under which a duality relationship holds in optimization problems. He has also made significant contributions to the study of quasi-convex functions and was involved in developing important algorithms and methods used in optimization.
The TI-Nspire series is a line of graphing calculators developed by Texas Instruments, designed primarily for educational purposes in mathematics and science. The TI-Nspire calculators are known for their advanced features, including symbolic algebra capabilities, dynamic graphing, 3D graphing, and support for programming. They are widely used in high school and college classrooms.
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 2. You can publish local OurBigBook lightweight markup files to either OurBigBook.com or as a static website.Figure 3. Visual Studio Code extension installation.Figure 5. . 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. - 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