A "stepped profile" generally refers to a design feature or graphical representation characterized by abrupt changes or steps between different levels or stages. The concept is utilized across various fields, such as: 1. **Architecture and Engineering**: In this context, a stepped profile might refer to a staircase-like structure or a façade that has a series of levels or tiers, rather than a smooth, continuous line.

A **kinematic pair** is a fundamental concept in kinematics and mechanical engineering that refers to the relationship between two links (or bodies) that are connected in such a way that they can move relative to each other. The motion that occurs between the two links is constrained to a specific type of movement due to the geometry of the connection.

Poinsot's ellipsoid is a geometric representation used in the study of rigid bodies in classical mechanics. It specifically describes the distribution of mass and the inertial properties of a rigid body. The concept is related to the inertia tensor of the body, which characterizes how the mass is distributed relative to its rotational axes. Poinsot's ellipsoid represents the relationships between the principal moments of inertia and the axes of rotation.

Ocean floor disposal refers to the practice of depositing various types of waste materials, including industrial waste, sewage sludge, and other refuse, onto the seabed or in the ocean. This method has been utilized in some regions as a means of waste management, often due to the vast expanse of the ocean and the belief that it offers a certain degree of dilution and isolation.

Radioactive scrap metal refers to any metal waste that has been contaminated with radioactive materials. This can occur in various ways, such as through industrial processes, accidents, or improper disposal of radioactive sources. This type of scrap metal can include a wide variety of metal types, like steel, aluminum, copper, and others that have been exposed to radioactive substances. Handling and processing radioactive scrap metal pose significant safety risks, as exposure to radiation can have detrimental effects on human health and the environment.

The Xeelee Sequence is a series of science fiction novels and short stories by British author Stephen Baxter. The works are centered around the conflict between humanity and an advanced extraterrestrial species known as the Xeelee, who are capable of manipulating the fabric of spacetime and have a deep understanding of various cosmic phenomena.

Eben Alexander is an American neurosurgeon who gained widespread attention for his book "Proof of Heaven: A Neurosurgeon's Journey into the Afterlife," published in 2012. In the book, Alexander recounts his near-death experience (NDE) during a period of coma caused by a severe brain infection. He describes vivid and transformative experiences he had while unconscious, which he interprets as evidence of an afterlife.

Lynne McTaggart is an American author and journalist best known for her work on the intersection of science, spirituality, and consciousness. She has written several books, including "The Field," "The Intention Experiment," and "The Bond," which explore topics such as quantum physics, the power of intention, and the interconnectedness of all living things. McTaggart is also a speaker and workshop leader, often focusing on the implications of her research in consciousness and healing.

GURPS Infinite Worlds is a supplement for the GURPS (Generic Universal RolePlaying System) role-playing game, developed by Steve Jackson Games. It provides a detailed framework for running campaigns that involve alternate realities and parallel universes. The core concept of Infinite Worlds explores the idea that there are infinite variations of reality, where different choices lead to different outcomes, resulting in countless alternate Earths and universes.

MetaZoo is a trading card game that combines elements of strategy, collection, and a fictional universe inspired by cryptids, folklore, and urban legends. Created by Mike Waddell and first released in 2020, the game features creatures known as "beasts" that players summon and battle against each other. The game incorporates a unique mechanic where players can use cards not only for attacks but also to create environmental conditions that can affect the game's outcome.

"The Counter-Clock Incident" is the title of the final episode of the animated television series *Star Trek: The Animated Series*. It originally aired on December 12, 1974. In this episode, Captain James T. Kirk and the crew of the starship USS Enterprise encounter a spatial anomaly that causes time to flow in reverse. As they investigate the phenomenon, they are drawn into a situation where time is moving backward, leading to unusual challenges and scenarios.

"Electricity and Magnetism" is a well-known textbook often used in physics courses, particularly at the undergraduate level. One of the most recognized versions is by Edward M. Purcell, titled "Electricity and Magnetism," which is part of the Berkeley Physics Course series. This book is known for its clear explanations and a focus on physical concepts, often using relativity as a framework for discussing electromagnetic theory.

"Comet" is a book by the author of the science fiction genre, but without more specific information, it's difficult to pinpoint which particular title you are referring to, as several books with that name exist. One well-known "Comet" is a novel by the author and physicist A. R. (Andrew R.) V. McGowan, which explores themes of science and human emotion against the backdrop of an impending cosmic event.

"Hyperspace: A Scientific Odyssey Through Parallel Universes, Time Warps, and the Tenth Dimension" is a popular science book written by theoretical physicist Michio Kaku, first published in 1994. In this book, Kaku explores advanced topics in physics, particularly concepts associated with string theory and higher dimensions.

"Mr. Tompkins" is the central character in a series of popular books and lectures by the British physicist and author George Gamow, designed to make complex scientific concepts accessible to the general public. The character Mr. Tompkins often finds himself in imaginative and surreal situations, allowing readers to explore topics such as relativity, quantum mechanics, and cosmology in an engaging way. The series began with "Mr.

The Black Hole War refers to a scientific debate primarily between two prominent physicists, Stephen Hawking and Leonard Susskind, regarding the fundamentals of black holes and the nature of information in quantum mechanics. The conflict arose in the 1970s and continued over several decades, primarily concerning what happens to information when it falls into a black hole.

"The Life of the Cosmos" is a book written by the physicist and cosmologist Lee Smolin, published in 1997. In this work, Smolin explores the nature of the universe and the concept of evolution on a cosmic scale. He challenges traditional views of cosmology and presents a novel framework for understanding the universe, proposing that the cosmos evolves in a manner analogous to biological evolution.

“.fr” is the country code top-level domain (ccTLD) for France. It is used primarily for websites associated with France or entities based in the country. Managed by the French Internet infrastructure body AFNIC (Association Française pour le Nommage Internet en Coopération), the ".fr" domain is commonly used by businesses, organizations, and individuals in France. To register a ".fr" domain, registrants usually need to meet certain criteria, such as having a presence in France.

The Journal of Lightwave Technology is a peer-reviewed scientific journal that focuses on research in the field of photonics and optical communication. It covers various topics related to the generation, manipulation, and transmission of light, including but not limited to fiber optics, optical devices, and integrated photonics. The journal publishes original research articles, reviews, and technical notes that contribute to the advancement of knowledge in these areas.

Nature Photonics is a peer-reviewed scientific journal that focuses on research in the field of photonics, which encompasses the generation, manipulation, and detection of light (photons).