Jozef Dravecký is a Slovak professional ice hockey player. He primarily plays as a forward and has been associated with various teams in the professional leagues, including the Slovak Extraliga and international leagues. Dravecký has also represented Slovakia in international competitions. His playing style is characterized by his agility and skill on the ice. For the most current information about his career, team affiliations, and statistics, it is best to check the latest sports news or dedicated hockey databases.

George F. R. Ellis is a prominent South African cosmologist and theoretical physicist, known for his work in the fields of cosmology, general relativity, and the philosophy of science. Born on February 20, 1934, he has made significant contributions to the understanding of the large-scale structure of the universe and the nature of space and time.

Marion Scheepers is a mathematician known for her work in the fields of topology, set theory, and mathematical logic. She has made contributions to areas such as the study of cardinal functions and the interplay between topology and set theory. Additionally, she has been involved in various mathematical communities and education, mentoring students and advocating for mathematics.

As of my last knowledge update in October 2021, Anuar Dyusembaev does not appear to be a widely recognized public figure, event, or term. It's possible that he could be a private individual, a name that has gained prominence after that date, or it could refer to someone in a more localized or specific context.

As of my last knowledge update in October 2023, there is no well-known figure, concept, or topic specifically called "David Khorol." It's possible that it could refer to a private individual or a niche topic that hasn't gained widespread recognition.

Felix Gantmacher is a notable mathematician primarily recognized for his contributions to various fields within mathematics, particularly in the areas of differential equations, mathematical analysis, and related fields. His work has had a significant impact on the theoretical foundations of these subjects.

Igor Dmitrievich Ado is a prominent Russian mathematician known for his significant contributions to the field of functional analysis and topology. He is particularly recognized for his work on the theory of linear operators and the study of infinite-dimensional spaces. Ado is also noteworthy for his involvement in the development of mathematical education and research in Russia.

Leonid Plyushch is a Ukrainian dissident known for his opposition to the Soviet regime. He was a prominent figure in the dissident movement during the 1960s and 1970s. Plyushch was an advocate for human rights and political freedoms in the Soviet Union, and his activities led to his imprisonment and forced psychiatric treatment. He became a symbol of resistance against oppression and a voice for those who suffered under Soviet rule.

Mark Iosifovich Graev does not appear to be a widely recognized public figure or concept based on available knowledge up to October 2023. It's possible that he could be a private individual or a notable figure who is not well-documented in public sources.

Olga Holtz is a mathematician known for her work in various areas of mathematics, including algebra and number theory. She is particularly recognized for her contributions to the fields of computational mathematics and algebraic geometry. Holtz has been associated with research and academic positions, often focusing on topics that merge mathematical theory with computational applications.

A common year is a year that is not a leap year, meaning it does not have an additional day added to it in February. In the Gregorian calendar, which is the calendar most widely used today, a common year has 365 days. This contrasts with a leap year, which has 366 days, occurring every four years (with some exceptions) to help synchronize the calendar year with the astronomical or seasonal year. In summary, a common year: - Has 365 days.

The 6AK5 is a small signal vacuum tube, also known as a miniature pentode, that was developed for applications in RF amplification and audio circuits. This tube is part of the family of 6V series tubes and is often used in radio equipment and other electronic devices where compactness and efficiency are required.

The 6AQ5 is a vacuum tube (or valve) that was commonly used in audio amplification and radio frequency applications. It is a type of power output pentode tube, which means it has five active elements: the cathode, anode (plate), control grid, and two screen grids.

The 6DJ8 is a vacuum tube that is part of the family of small-signal triodes, often used in various audio and radio applications. It has a dual triode configuration, meaning it contains two independent triode sections in one envelope. The tube is known for its low noise, high gain, and relatively high transconductance, which makes it popular in audio amplifiers, phono preamps, and various RF applications.

Robert Minlos is a mathematician known for his work in mathematical physics, particularly in areas like statistical mechanics, quantum field theory, and operator algebras. He has contributed to various topics, including the mathematical foundations of quantum mechanics and the study of random processes. His research often involves rigorous analysis and the development of mathematical frameworks to better understand complex physical systems.

Samuil Shatunovsky is not a widely recognized figure based on available information as of October 2023.

Sergei Sobolev was a prominent Soviet mathematician best known for his contributions to functional analysis and differential equations. He is particularly noted for the development of Sobolev spaces, which are pivotal in the study of partial differential equations and the theory of weak solutions. Sobolev spaces provide a framework for analyzing functions and their derivatives in a generalized sense, allowing for the treatment of functions that may not be classical differentiable.

Vera Faddeeva is a character from the 1971 Soviet film "The Dawns Here Are Quiet," directed by Stanislav Rostotsky. The film is based on a novel by Boris Vasilyev and tells the story of a group of young Soviet female anti-aircraft gunners during World War II. Vera is one of the central characters in the narrative, which explores themes of bravery, sacrifice, and the impact of war on young lives.

Victor Borisov is a Russian physicist known for his contributions to various fields within physics, particularly in the study of materials and condensed matter physics. He may be involved in research related to superconductivity, nanotechnology, or other physics disciplines. However, without more specific information or context, it is challenging to provide a detailed overview of his work or significance.