Topics (217k) Articles (222k) Users (305) Discussions (237) Comments (383) Files (721) New article
Pitteway triangulation is a method used in mathematics and computer graphics for the triangulation of polyhedral surfaces, which involves breaking down a complex surface into simpler triangular components. This technique is particularly useful in computer graphics for rendering 3D models, as it simplifies the geometry and allows for easier manipulation and computation. The method typically involves defining a set of points on the surface and then systematically creating triangles that connect these points, ensuring that the entire surface is covered without overlaps or gaps.
A **nonobtuse mesh** is a type of geometric mesh used primarily in finite element methods and computational geometry. In this context, a mesh is a collection of vertices, edges, and faces that defines a geometric shape or domain over which computations are performed. The term "nonobtuse" refers to the angles formed by the elements (usually triangles or tetrahedra) in the mesh.
Minimum-weight triangulation (MWT) refers to the problem of dividing a simple polygon into triangles in such a way that the total weight of the edges used in the triangulation is minimized. The "weight" of an edge can be defined in various ways depending on the context, but it commonly relates to the length of the edge in geometric scenarios.
Kinetic triangulation is a concept from computational geometry that deals with the dynamic problem of maintaining the properties of a triangulation of a set of points in motion. Specifically, it refers to the process of efficiently updating the triangulation structure as the points in the plane change their positions over time.
Fan triangulation is a method used in computational geometry, particularly in the field of computer graphics and geographic information systems. The process involves breaking down a polygon (usually a simple polygon) into a set of triangles, which can be more easily processed in various applications such as rendering or spatial analysis. The distinguishing feature of fan triangulation is that it typically starts from a single vertex (the "fan" vertex) and connects it to all other vertices of the polygon, forming a series of triangles.
Delaunay triangulation is a geometric method for dividing a set of points into triangles such that no point is inside the circumcircle of any triangle in the triangulation. This property maximizes the minimum angle of the triangles, which helps avoid skinny triangles and is particularly useful in computational geometry and various applications including computer graphics, geographical information systems (GIS), and numerical simulations.
Delaunay refinement is a computational geometry technique primarily used in the context of mesh generation. It aims to create a mesh composed of triangles (or tetrahedra in 3D) that satisfies certain optimality criteria, such as minimizing the maximum angle of the triangles (maximizing the minimum angle), and ensuring that the mesh conforms to specified geometric constraints of the underlying domain.
Constrained Delaunay triangulation (CDT) is a type of triangulation for a planar point set that respects certain constraints, particularly the inclusion of specified edges (or line segments) in the triangulation. This is an extension of the standard Delaunay triangulation, which is defined without any constraints.
The Bowyer-Watson algorithm is a computational geometry algorithm used to incrementally construct a Delaunay triangulation of a set of points in a two-dimensional space. A Delaunay triangulation maximizes the minimum angle of the triangles formed, avoiding skinny triangles and ensuring better numerical stability for applications such as mesh generation and interpolation.
An Apollonian network is a type of geometric network that is constructed using a recursive process based on the properties of triangular tiling. It begins with a single triangle, which is then subdivided into smaller triangles recursively. The network has a rich structure and exhibits fractal characteristics, making it interesting in the study of complex networks.
An antiprism is a type of polyhedron that consists of two parallel polygonal bases connected by a band of triangular faces. It can be described as a generalized version of a prism, where instead of the bases being congruent and aligned, the bases are offset from each other and connected by equilateral triangles. Key features of an antiprism include: 1. **Polygonal Bases**: The two bases are identical polygons, such as triangles, squares, or pentagons.
Youth travel refers to the travel undertaken by young people, typically aged between 18 and 30, though the age range can vary. This niche of travel is characterized by a focus on experiences that cater to the interests and needs of younger travelers. It often emphasizes adventure, exploration, cultural exchange, education, and personal growth.
"World's Most Amazing Vacation Rentals" is a travel and lifestyle show that premiered on Netflix. The series showcases unique and extraordinary vacation properties around the world, featuring a range of accommodations, from luxurious villas and charming cottages to unusual stays like treehouses and castles. Hosted by a trio of travel enthusiasts—who often explore the properties, highlighting their unique features and amenities—the show aims to inspire viewers to consider different types of travel experiences.
Traveler's diarrhea is a common illness that affects individuals who travel to areas with different hygiene practices, food handling, and sanitation conditions than they are accustomed to. It is typically characterized by the sudden onset of diarrhea, which may be accompanied by other symptoms such as abdominal cramps, nausea, vomiting, and fever. The primary cause of traveler's diarrhea is often the consumption of contaminated food or water. The most common pathogens responsible for this condition include: - Bacteria (e.g.
A travel warning is an official notice or advisory issued by a government or relevant authority to inform its citizens about potential risks or dangers associated with traveling to specific destinations. These warnings can cover a range of issues, including: 1. **Health Risks**: Outbreaks of diseases, such as epidemics or pandemics, that could affect travelers. 2. **Safety and Security**: Information about potential threats such as terrorism, civil unrest, violent crime, or natural disasters.
A travel survey is a research method used to gather information about people's travel behaviors and preferences. These surveys are instrumental in collecting data that can help planners, policymakers, and researchers understand how individuals and groups move within a city, region, or country. Here are some key aspects of travel surveys: 1. **Purpose**: The primary aim is to analyze travel patterns, such as where people go, how they get there, the reasons for their trips, and the frequency of travel.
Travel photography is a genre of photography that focuses on capturing the essence of a location, its culture, people, landscapes, and experiences associated with travel. It aims to tell a story about a place and evoke a sense of wanderlust, showcasing not just the sights but also the emotional and cultural context of the destination.
Travel medicine is a specialized field of medicine focused on the health risks associated with travel. It encompasses the prevention and treatment of illness and injury that may arise in travelers, especially in foreign environments. This discipline includes but is not limited to: 1. **Vaccinations**: Administering vaccines to protect travelers from diseases that are more common in certain regions (e.g., yellow fever, hepatitis A and B, typhoid fever, malaria).
A travel itinerary is a detailed plan or schedule outlining the details of a trip. It typically includes information such as: 1. **Destinations**: Locations you will visit during your trip. 2. **Dates and Times**: Departure and arrival dates, as well as specific times for activities and accommodations. 3. **Transportation**: Information about flights, trains, car rentals, or other means of transport, including confirmation numbers and travel times.
Travel in classical antiquity refers to the movement of people, goods, and ideas across various regions during ancient times, particularly in societies such as Greece and Rome. This era, which encompasses a broad timeframe from about 800 BCE to 500 CE, was marked by a variety of travel practices that were influenced by geography, politics, culture, and economy.
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





