Yossi Matias is a prominent figure in the field of computer science and artificial intelligence, particularly known for his work with Google. He has made significant contributions to various areas, including machine learning and natural language processing. Matias has held leadership roles within Google, overseeing research initiatives and the development of technologies that leverage AI to improve user experiences and enhance product capabilities.

Heusler compounds are a class of intermetallic materials that showcase unique magnetic, electronic, and mechanical properties. They are typically ternary or quaternary alloys composed of three or four elements, frequently featuring combinations of transition metals, main group metals, and sometimes metalloids.

"A Topological Picturebook" is a book by the mathematician and topologist George W. Whitehead, published in 1973. The book aims to introduce concepts in topology—a branch of mathematics that deals with the properties of space that are preserved under continuous transformations—using visual and intuitive explanations. It combines illustrations with discussions of topological ideas, making the subject more accessible, especially for readers who may not have a deep background in mathematics.

Information-theoretic security is a concept in the field of cryptography that aims to ensure the security of a communication or information system based on the theoretical limits of information theory, rather than relying on computational assumptions. In other words, information-theoretic security guarantees that the security of the system is not dependent on the computational power of an adversary. The most notable example of a cryptographic system that provides information-theoretic security is the one-time pad.

A strong prime is a concept in number theory related to the properties of prime numbers. Specifically, a prime number \( p \) is considered a strong prime if it is greater than the arithmetic mean of the nearest primes that are less than and greater than \( p \).

Surveillance aircraft are specialized aircraft designed to gather intelligence and monitor activities over a specific area. They are equipped with various sensors and technologies that enable them to collect data, including visual imagery, infrared or thermal images, radar information, and signals intelligence. Surveillance aircraft can be used for a variety of purposes, including: 1. **Military**: Used for reconnaissance to monitor enemy activities, gather battlefield intelligence, and coordinate military operations.

The National Precursor Log Exchange (NPLEx) is a system in the United States designed to monitor the sale of precursor chemicals that are used in the illicit production of methamphetamine and other drugs. NPLEx allows pharmacies and retailers to report the sale of products containing pseudoephedrine and other regulated substances to a centralized database in real time.

Operation RAFTER is a collaborative initiative between the United States and Mexico aimed at combating drug trafficking and organized crime along the U.S.-Mexico border. The operation focuses on enhancing law enforcement's ability to share intelligence, conduct joint operations, and improve coordination between agencies to effectively disrupt the flow of illegal drugs, weapons, and human trafficking across the border. The operation leverages technology, including aerial surveillance and intelligence gathering, to monitor and respond to illicit activities more effectively.

Surveying instruments are tools used by surveyors to measure distances, angles, and elevations for various applications, including land surveying, construction, and mapping. Here’s a list of commonly used surveying instruments: 1. **Total Station**: A combination of an electronic theodolite and an electronic distance measurement (EDM) device, used for measuring angles and distances. 2. **Theodolite**: An instrument for measuring angles in the horizontal and vertical planes.

Sight devices generally refer to optical devices used for aiming or observing. In military and sporting contexts, they could include various types of scopes, sights, or optics attached to firearms for improved accuracy. In a more general context, sight devices can also refer to equipment used for vision enhancement or adjustments, such as glasses or contact lenses.

From episode "Mortynight Run"

Funding:

This section discusses the pre-photon understanding of the polarization of light. For the photon one see: photon polarization.

polarization.com/history/history.html is a good page.

People were a bit confused when experiments started to show that light might be polarized. How could a wave that propages through a 3D homgenous material like luminiferous aether have polarization?? Light would presumably be understood to be analogous to a sound wave in 3D medium, which cannot have polarization. This was before Maxwell's equations, in the early 19th century, so there was no way to know.

composite particle made up of an even number of elementary particles, most commonly one particle and one anti-particle.

This can be contrasted with mesons, which have an odd number of elementary particles, as mentioned at baryon vs meson vs lepton.

The term "choke exchange" does not appear to be widely recognized in common discourse or specific fields as of my last knowledge update in October 2021. However, it’s possible that you might be referring to several distinct concepts, including: 1. **Financial Markets**: In the context of trading or exchanges, a "choke" might refer to a scenario where liquidity is limited, causing difficulty in buying or selling assets at desired prices.