Polyisocyanurate, often abbreviated as PIR, is a type of thermoset plastic that is derived from the polymerization of isocyanate and polyol. It is a member of the polyurethane family, but with a higher degree of rigidity and thermal stability. Polyisocyanurate is primarily used for its excellent insulating properties, making it a popular choice in the construction and manufacturing sectors.

Ice navigation refers to the techniques, practices, and operations involved in navigating vessels through ice-covered waters. This is a critical area of maritime navigation, especially for ships operating in polar regions or during winter months when waterways become obstructed by ice. Key aspects of ice navigation include: 1. **Types of Ice**: Understanding different types of ice (e.g., pack ice, field ice, brash ice, shorefast ice) and their characteristics is essential.

In economics, an "index" is a statistical measure that reflects changes in a particular variable or group of variables over time. It is commonly used to track economic indicators and trends, making it easier to analyze data and compare performance across different time periods or regions. Here are some common types of economic indices: 1. **Price Indices**: Measure changes in the price level of a basket of goods and services over time.

Xenoy is a brand name for a family of engineering thermoplastic materials produced by SABIC (Saudi Basic Industries Corporation). These materials are primarily a blend of polycarbonate and acrylonitrile-butadiene-styrene (ABS), which gives them a unique combination of properties. Xenoy is known for its high impact resistance, strength, durability, and heat resistance, making it suitable for a variety of applications, including automotive parts, consumer electronics, and industrial components.

Nik Nanos is a prominent Canadian pollster, researcher, and political analyst known for his work in public opinion research and market analysis. He is the founder and CEO of Nanos Research, a company that specializes in polling and survey research across various sectors, including politics, business, and social issues. Nanos is often called upon by media outlets and organizations to provide insights and analyses on public opinion trends in Canada, particularly during elections and significant political events.

Windows 2.0x refers to a series of early versions of Microsoft's Windows operating system that were part of the second major release of Windows. Specifically, Windows 2.0 was released in December 1987, and it was followed by Windows 2.03 in 1988 and Windows 2.1x in 1989. Windows 2.0 introduced several improvements and features over its predecessor, Windows 1.

Shizuo Kakutani is a prominent Japanese mathematician known for his work in functional analysis, game theory, and the Kakutani fixed-point theorem. The Kakutani fixed-point theorem is a generalization of Brouwer's fixed-point theorem and is significant in various fields, including economics and game theory, as it provides conditions under which a fixed point exists in a compact, convex set.

As of my last knowledge update in October 2023, Vera Serganova is not a widely recognized figure or concept in popular culture, science, or other well-known contexts. It is possible that Vera Serganova could refer to a private individual or a lesser-known entity that has not gained significant public attention.

A sphenic number is a positive integer that is the product of three distinct prime numbers. In other words, a sphenic number can be expressed in the form \( p_1 \times p_2 \times p_3 \), where \( p_1 \), \( p_2 \), and \( p_3 \) are prime numbers and \( p_1 \), \( p_2 \), and \( p_3 \) are all different from one another.

A skyrmion is a type of topological soliton—a stable, localized configuration of a field—found in certain magnetic materials. It is characterized by a nontrivial topology and can be thought of as a swirling configuration of spins, which are the magnetic moments of atoms. The concept of skyrmions originates from theoretical physics and was first proposed by British physicist Tony Skyrme in the 1960s, primarily in the context of particle physics.

Predicted by the Dirac equation.

Can be easily seen from the solution of Equation "Expanded Dirac equation in Planck units" when the particle is at rest as shown at Video "Quantum Mechanics 12b - Dirac Equation II by ViaScience (2015)".

Described for example in lecture 1.

A relativistic version of the Schrödinger equation.

Correctly describes spin 0 particles.

The most memorable version of the equation can be written as shown at Section "Klein-Gordon equation in Einstein notation" with Einstein notation and Planck units:

Has some issues which are solved by the Dirac equation:

Bibliography:

Related: Dirac equation vs quantum electrodynamics.

Theorized for the graviton.

First let's discuss the argument against abortion. Most people would save the life of an infant over that of an animal, even if the animal is more intelligent. The only unbiased reason to do this is that given nutrients, the baby will develop into a more intelligent lifeform in the future. Thus wanting to save a "clump of cells" isn't as irrational as it may seem.

But our hypothetical above assumes that both the baby and the animal want to live. By not killing themselves, all conscious creatures have implicitly expressed their desire to continue living, and most people agree that that is to be respected, at least for humans. Which is why killing a person painlessly while they're unconscious is still considered wrong. But this desire does not apply to fetuses before the third trimester, which have never been conscious. This is the moral argument for abortion. There is also the obvious utilitarian argument for it.

The current system is dominated by government action, so fixing problems often requires even more government action. This does not say anything as to the feasibility of a fully libertarian system. Private entities take time to develop and immediately dismantling entire government institutions may not be the best move, hence why companies benefitting from government aid and intellectual property also need antitrust legislation, and why suddenly cutting subsidies/welfare can hurt a lot of people.