The 20th century was a remarkable period for Austrian physics, with several notable physicists making significant contributions to various fields. Here are a few prominent Austrian physicists from that time: 1. **Erwin Schrödinger (1887-1961)**: A key figure in quantum mechanics, Schrödinger is best known for the formulation of the Schrödinger equation, which describes how the quantum state of a physical system changes over time.

The 20th century saw significant contributions from Danish physicists, with Niels Bohr being one of the most prominent figures. 1. **Niels Bohr (1885-1962)**: Bohr was awarded the Nobel Prize in Physics in 1922 for his foundational work in atomic structure and quantum theory, particularly the Bohr model of the atom.

The 20th century saw several significant Greek physicists who contributed to various fields within physics. Here are a few notable figures: 1. **John L. Sullivan (Yiannis L. Souliotis)** - Although primarily known as a chemist, A. Souliotis made significant contributions to physical chemistry and was influential in the development of theoretical models.

The 20th century saw significant contributions from Irish physicists in various areas of research. Here are a few notable figures: 1. **Ernest Walton (1903-1995)**: An Irish physicist who, along with his collaborator, was awarded the Nobel Prize in Physics in 1951 for their work on the development of the first cyclotron and for the artificial disintegration of atomic nuclei. Walton’s work was crucial in advancing nuclear physics.

3D sound localization is the ability to perceive and identify the location of sounds in three-dimensional space. This process involves determining the direction and distance of a sound source relative to the listener's position and orientation. It is a complex task that relies on various auditory cues and the brain's processing capabilities. Key elements involved in 3D sound localization include: 1. **Interaural Time Differences (ITD):** The difference in the time it takes for a sound to reach each ear.

Twenty-first-century New Zealand physicists have made significant contributions across various fields of physics, both in theoretical and experimental areas. Here are some prominent figures and developments from 20th-century New Zealand physics: 1. **Ernest Rutherford**: Often called the father of nuclear physics, Rutherford was born in New Zealand and became one of the most prominent scientists of the 20th century.

The 20th century saw significant contributions from Taiwanese physicists, particularly as Taiwan developed its educational and research institutions. Here are a few notable figures and advancements in physics from Taiwan during that period: 1. **John H. Wong**: One of the notable physicists who worked in the field of condensed matter physics and contributed to the understanding of the properties of materials. 2. **S. Y. Lee**: An important figure in accelerator physics and a prominent researcher in particle physics.

The 21st century has seen numerous Bulgarian physicists make significant contributions to various fields within physics. Notably, many of these physicists have been involved in research areas such as theoretical physics, condensed matter physics, quantum physics, and astrophysics. While providing a complete list of all influential Bulgarian physicists in the 21st century is challenging, I can highlight a few notable names and their contributions: 1. **Georgi D. W.

The 21st century has seen notable contributions from Greek physicists across various fields, including particle physics, astrophysics, condensed matter physics, and more. Some prominent Greek physicists and researchers include: 1. **George A. Michalopoulos** - Focused on quantum optics and quantum information. 2. **Nikos A. Koutoulakis** - Known for work in experimental particle physics, particularly related to the Large Hadron Collider.

The 21st century has seen significant contributions from Russian physicists across various fields of physics, including condensed matter physics, quantum mechanics, astrophysics, and particle physics. Some notable Russian physicists and their areas of work include: 1. **Alexei Abrikosov** - Known for his work on superconductivity and magnetic flux in superconductors, he was awarded the Nobel Prize in Physics in 2003.

In the context of mathematics, particularly in the areas of algebraic geometry and geometric representation theory, a "character variety" refers to a specific type of geometric space that parametrizes representations of a group into a particular algebraic structure, typically a Lie group or algebra.

The term "21st-century Swiss physicists" refers to physicists from Switzerland who have made significant contributions to the field of physics during the 21st century. Some notable Swiss physicists from this era include: 1. **Geneviève G. A. Michalet** - Known for her work in biophysics and nanotechnology. 2. **Alain Aspect** - A leading figure in quantum mechanics, particularly in experiments testing Bell's theorem. 3. **Walter B.

The term "21st-century Ukrainian physicists" refers to physicists from Ukraine or of Ukrainian descent who are active in the field of physics in the 21st century. Throughout this period, Ukrainian physicists have contributed to various areas of research, including condensed matter physics, nuclear physics, astrophysics, and more.

Aaron Robertson is a mathematician known primarily for his contributions to the field of mathematics, particularly in areas such as algebra and combinatorics. He may also be involved in educational pursuits or mathematical research, though details about his specific work or achievements may be limited.

AB5, or Assembly Bill 5, is a California law that was enacted in 2019, aimed at changing the classification of workers in relation to employment status. The legislation primarily affects how companies determine whether a worker is classified as an employee or an independent contractor. Under AB5, a stricter "ABC test" is used to assess the employment status of workers.

A. Baha Balantekin is a theoretical physicist known for his work in areas such as nuclear and particle physics. He is recognized for his contributions to the understanding of fundamental interactions and phenomena in these fields. Balantekin has been involved in various academic and research activities, including publishing numerous papers and participating in conferences related to his area of expertise. He may also be affiliated with a university or research institution where he teaches and conducts research.