Massimo Porrati is a theoretical physicist known for his work in the fields of quantum field theory, string theory, and related areas of theoretical physics. He has contributed to discussions about the foundations of quantum mechanics, the nature of spacetime, and concepts in string theory. Porrati has also focused on issues related to dualities in physics and the implications of these concepts for our understanding of fundamental forces and particles.

Johannes Kuenen is not a widely recognized figure as of my last knowledge update in October 2023, so it's possible that you may be referring to a niche or less-known individual, or perhaps there has been a development after that date.

Tito Arecchi does not correspond to any widely recognized figure, concept, or term as of my last knowledge update in October 2021. It’s possible that it could refer to a person, a brand, a fictional character, or something else that gained relevance after that date. If "Tito Arecchi" has emerged or become significant after that point, I would not have that information. Please provide more context or check the latest sources for updates!

Aleksandr Gurevich is a relatively common name, and without additional context, it is difficult to determine exactly who you might be referring to. It could refer to various individuals in different fields, such as arts, sciences, or sports.

Alexander Tselikov may refer to various individuals or subjects, but without more context, it’s difficult to provide a specific answer.

Dmitri Skobeltsyn (1900-1990) was a prominent Russian physicist known for his contributions to particle physics and experimental physics. He is recognized for his work in the development of particle detection techniques and for his involvement in various significant experiments in the field of nuclear and particle physics. Skobeltsyn played a crucial role in advancing the understanding of cosmic rays and subatomic particles.

Fyodor Reshetnikov is a prominent Russian scientist known for his contributions to the fields of astrophysics and space science. He has worked on various research projects related to planetary atmospheres, the study of exoplanets, and the interactions between solar winds and planetary environments. His work often involves computational modeling and simulations to better understand complex astrophysical phenomena.

Leonid Sedov is primarily known as a prominent Russian theoretical physicist. He made significant contributions to various fields in physics, particularly in the areas of fluid dynamics, astrophysics, and plasma physics. His work has been influential in the study of shock waves, explosions, and other dynamic processes in fluids.

Leonid Shkadov, often referred to in relation to the "Shkadov Thruster," is a theoretical concept in astrophysics and engineering for an enormous spacecraft propulsion system. The Shkadov Thruster would be based on a large reflective surface (similar to a solar sail) positioned near a star, which would redirect stellar radiation pressure. This concept envisions using the energy output of a star to generate thrust and potentially move celestial bodies or spacecraft.

Nikolai Borisovich Delone (also known as Nikolai Delone) was a prominent Soviet mathematician, primarily known for his contributions to the fields of number theory, geometry, and mathematical logic. He was particularly influential in the development of concepts related to algebraic numbers and diophantine equations. His work often intersected with areas such as group theory and mathematical analysis.

Venedikt Dzhelepov is a prominent Russian physicist known for his significant contributions to the field of nuclear physics, particularly in the study of the behavior of nuclear matter and advanced experimental techniques in nuclear spectroscopy. His research has led to advancements in understanding the structure of atomic nuclei and various nuclear reactions. Dzhelepov's work often involves collaboration with international research institutions and has implications for both fundamental physics and applications in nuclear technologies.

Viktor Matveev is a physicist known for his work in the field of condensed matter physics, particularly in the areas of quantum mechanics and the theory of quantum liquids. He has contributed to the understanding of different physical phenomena, including superconductivity and quantum phase transitions, through both theoretical and experimental research.

Methodios Anthrakites, also known as Methodius of Athos, was a Byzantine philosopher and theologian who lived during the 14th century. He is particularly noted for his role in the Hesychast controversy, which revolved around the practices and theological implications of the mystical prayer of the heart, known as Hesychasm.

Francesco Maria Grimaldi (1618-1663) was an Italian scientist, physicist, and mathematician, best known for his contributions to the study of light and the phenomenon of diffraction. He is often credited with being one of the first to investigate the wave nature of light. His most notable work involved the observation and documentation of the bending of light waves around edges, which he called "diffraction.

Giovanni Battista Baliani (born in 1647 and died in 1712) was an Italian physicist and mathematician. He is known for his work in the field of fluid dynamics and for his investigations into the properties of air, including barometric pressure. Baliani conducted experiments that contributed to the understanding of vacuums and atmospheric pressure.

Paolo Casati is an Italian physicist and professor, noted for his work in the fields of nanoscience and photonics, particularly in the context of quantum optics and the manipulation of light at the nanoscale. He might be recognized for his research contributions, publications, and involvement in scientific communities.

Online mourning refers to the practice of expressing grief and commemorating a deceased person through digital platforms and social media. This phenomenon has gained prominence with the rise of the internet and social media, allowing individuals to share their feelings, memories, and tributes related to the loss of someone they cared about.

The term "PC Master Race" is a phrase used in gaming culture to refer to the belief that gaming on a personal computer (PC) offers a superior experience compared to gaming on consoles. It originated as a tongue-in-cheek slogan within the PC gaming community, often reflecting a sense of pride among PC gamers regarding the technical advantages that PC gaming can provide, such as better graphics, higher frame rates, customization options, and modding capabilities.

"Der Kriegspielers Fantastiques" is a term that may refer to a specific work or concept related to military simulation, gaming, or strategy, but there isn't widely recognized or specific information available under that title as of my last knowledge update in October 2023.