Trigonal planar molecular geometry is a type of molecular shape that occurs when a central atom is surrounded by three other atoms, all positioned at the corners of an equilateral triangle. This arrangement results in a bond angle of approximately 120 degrees between the atoms. The trigonal planar shape is typically found in molecules where the central atom has three bonding pairs of electrons and no lone pairs. An example of a molecule with trigonal planar geometry is boron trifluoride (BF₃).

Nicolae Vasilescu-Karpen (1881–1964) was a Romanian engineer and inventor, best known for his work in the field of electrical engineering and for significant contributions to thermoelectricity and energy conversion. He is particularly noted for developing the "Karpen battery," a type of thermoelectric generator that operates based on the principles of thermoelectricity.

Durmus A. Demir is a name that may refer to a specific individual, likely involved in academic or professional fields. However, without additional context, it is challenging to provide a precise identification or description. This name does not appear to be widely recognized in popular culture or major historical contexts.

Nihat Berker is notable as a Turkish physicist and academic known for his work in condensed matter physics and statistical mechanics. He has made significant contributions to the understanding of complex systems and the behavior of materials at a microscopic level. In addition to his research, Berker is known for his role in education and has held various academic positions in universities.

Yaşar Önel is a Turkish artist recognized for his work in various fields, including painting, sculpture, and installation art. His artworks often explore themes related to identity, culture, and social issues, blending traditional techniques with contemporary concepts. Önel may also be involved in artistic collaborations, exhibitions, and educational initiatives to promote art in Turkey and beyond.

"Polish women physicists" refers to female physicists from Poland who have made significant contributions to the field of physics. While historically, the sciences, including physics, have been male-dominated, many Polish women have excelled and made impactful contributions in various areas of physics, such as theoretical physics, experimental physics, and applied physics.

"Romanian astrophysicists" refers to astrophysicists from Romania or those who conduct their research and work in Romania, contributing to the study of the universe, celestial bodies, and the fundamental laws of physics governing them. Romania has a number of institutions and universities engaged in astronomical and astrophysical research, including the Astronomical Institute of the Romanian Academy and the University of Bucharest.

Ion I. Agârbiceanu (1882–1963) was a Romanian writer, journalist, and politician, known for his contributions to Romanian literature and his involvement in the cultural and social life of Romania. He is particularly recognized for his novels, short stories, and essays that often depict the rural life and traditions of Transylvania. His works reflect themes of social justice, morality, and the struggles of the peasant class.

Ștefan C. Hepites is not widely recognized as a notable figure in popular media, history, or other well-documented fields as of my last update in October 2021. It's possible that he may be a lesser-known individual, or perhaps a local figure, artist, or academic whose prominence has emerged more recently or is not well-documented in widely accessible sources.

Russian biophysicists are scientists from Russia who specialize in the field of biophysics, which is an interdisciplinary area combining principles and methods from physics with biological systems. Biophysicists study the physical principles underlying biological processes, including the structure and function of biomolecules, cellular mechanisms, and physiological phenomena. In Russia, biophysics has a rich history, with contributions from renowned scientists and institutions.

"Russian nuclear physicists" refers to scientists and researchers in Russia who specialize in the field of nuclear physics. This branch of physics deals with the properties and behavior of atomic nuclei, including the forces that hold them together, the reactions that occur during nuclear interactions, and the applications of nuclear energy, among other topics. Russian nuclear physicists have been influential in the development of various nuclear technologies, including nuclear power generation, nuclear medicine, and even nuclear weapons research.

Igor Minin may refer to a specific individual or concept, but without further context, it's difficult to provide a precise answer. There may be multiple people named Igor Minin, or it could refer to a fictional character, place, or another mention in various fields like sports, arts, or sciences.

“Russian plasma physicists” refers to scientists and researchers in Russia who specialize in the study of plasma physics. Plasma physics is a branch of physics that deals with the behavior of ionized gases, or plasmas, which are often referred to as the fourth state of matter (after solid, liquid, and gas). In a plasma, a significant number of atoms are ionized, leading to unique electromagnetic properties and behavior.

Alexey Alexandrov could refer to multiple individuals, as it is a relatively common name. Without more context, it's difficult to pinpoint exactly which Alexey Alexandrov you are referring to. For instance, it could be a reference to: 1. **A scientist or academic**: There may be notable individuals with that name in fields such as physics, mathematics, or other areas of research.

Dmitry Kolker was a Russian scientist and professor known for his work in the field of quantum optics and laser physics. He gained some public attention for his contributions to research and education in these areas. Unfortunately, as of my last knowledge update in October 2021, I do not have any further specific details beyond that. Please check current sources for the most up-to-date information about his work or any recent developments related to him.

As of my last knowledge update in October 2021, there isn't a widely recognized individual named Andrei Tverdokhlebov. It's possible that he may not be a public figure, or information about him hasn't reached widespread visibility in news or popular culture. If he has gained prominence after my last training cut-off, I would not have that information. Please provide additional context or check current sources for the most up-to-date information.

Constantin Perskyi was a pioneering figure in the field of telecommunications and is notably recognized for his contributions to the development of television technology. He is often credited with coining the term "television" in the early 20th century. Perskyi was an engineer and inventor, and he played a significant role in the theoretical and practical aspects of electronic communication. His work helped lay the foundation for later advancements in broadcasting and visual media.

Gennadi Sardanashvily is a prominent Russian mathematician known for his contributions to differential geometry, mathematical physics, and the foundations of geometry. He has worked on topics such as the geometry of manifolds, the theory of connections, and the geometric aspects of gauge theories. Sardanashvily has published numerous research papers and is recognized in academic circles for his influence and expertise in these areas.

Irina Novikova is a physicist known for her work in the field of quantum optics and photonics. She has made significant contributions to areas such as electromagnetically induced transparency (EIT), quantum memory, and the interaction of light with matter. Her research often involves exploring how light can be controlled and manipulated at the quantum level, which has important implications for quantum information science and technology.

Lev Bulat does not appear to be widely recognized in popular culture, history, or notable figures as of my last knowledge update in October 2023. It's possible that he is a lesser-known individual or a private person.