Henri Abraham may refer to several subjects, depending on the context. It could be a person's name, potentially associated with significant contributions in fields such as science, art, or literature, or it may reference a specific concept or entity related to a historical figure or event. However, without more context or details, it's difficult to provide a specific answer.

Pierre Louis Dulong (1785–1838) was a prominent French chemist and physicist best known for his contributions to the study of heat capacities and atomic theory. One of his significant contributions is known as Dulong-Petit Law, which he formulated in collaboration with his colleague Alexis Thérèse Petit.

Alfred Bucherer is best known as a prominent figure in the Swiss watchmaking industry. He founded the Bucherer company in 1888, which has grown to become a leading retailer of luxury watches and jewelry. The company is recognized for its extensive selection of high-end watch brands, offering both new and pre-owned timepieces. In addition to retail, Bucherer has also been involved in manufacturing luxury watches, collaborating with various prestigious brands, and has gained a reputation for quality and craftsmanship.

Wilhelm Hallwachs was a German physicist known for his contributions to the field of electromagnetism and the study of photoelectric effects. He was born on March 4, 1859, and passed away on January 21, 1929. Hallwachs is particularly noted for the discovery of the phenomenon of photoelectric emission, which refers to the emission of electrons from a material when it is exposed to light.

Johann Wilhelm Hittorf (1824–1914) was a German physicist and chemist known for his significant contributions to the study of ion transport and the electrical properties of gases. One of his most notable achievements was the development of the Hittorf method, which he used to study the migration of ions in electrolytes. He also explored cathode rays and made important discoveries regarding the behavior of gases and electric discharges.

Karl Ferdinand Braun (1850–1918) was a German physicist and inventor best known for his pioneering work in the field of telecommunications and electronic technology. He made significant contributions to the development of radio communications and is particularly credited with the invention of the crystal receiver and the development of the cathode-ray tube (CRT), which later became fundamental to television and oscilloscopes.

Max Planck was a German theoretical physicist best known for his role in the development of quantum theory, which revolutionized the understanding of atomic and subatomic processes. He was born on April 23, 1858, and died on October 4, 1947. In 1900, Planck introduced the idea that energy is quantized, proposing that electromagnetic energy could be emitted only in discrete quantities, or "quanta.

Max Wien is a concept from physics, specifically in the field of thermodynamics and statistical mechanics. It is often associated with Max Wien's displacement law, which relates to the thermal radiation emitted by a black body. This law states that the wavelength at which the emission of energy is maximized shifts inversely with the temperature of the black body; as the temperature increases, the peak wavelength decreases.

Peter Theophil Riess might refer to the German mathematician and engineer who is known for his contributions to the fields of mathematics and engineering, particularly in relation to linear algebra and its applications.

Rudolf Kohlrausch (1809–1858) was a German physicist and chemist known for his significant contributions to the fields of electrochemistry and physics. He is perhaps best remembered for his work on the electrical conductivity of electrolytes and for establishing the Kohlrausch law, which describes the relationship between the conductance of a solution and the concentrations of the ions present.

Wilhelm Wien refers to the German physicist Wilhelm Wien, who is best known for his contributions to the field of thermodynamics and radiation. He was born on January 13, 1864, and died on August 30, 1928. Wien's most significant work is related to "Wien's displacement law," which describes how the wavelength at which the emission of a black body spectrum is maximized shifts to shorter wavelengths as the temperature increases.

Demetrios Eginitis, also known as Demetrius Eginitis, was a notable figure in Greek history, primarily recognized as a 19th-century political figure. He served as the governor of various regions during the period following Greece's independence from Ottoman rule. His contributions were significant in the development of the modern Greek state. In addition to his political role, Eginitis's legacy includes his involvement in various reforms aimed at modernizing the country and fostering national identity.

Knut Ångström is a unit of measurement in the field of physics and chemistry, specifically used to describe very small distances, particularly at the atomic and molecular scale. It is named after the Swedish physicist Anders Jonas Ångström, who made significant contributions to the study of spectroscopy and the understanding of atomic structure. One Ångström (represented as Å) is equal to \(1 \times 10^{-10}\) meters, or 0.1 nanometers.

As of my last update in October 2021, Michael K. Stefanidis is known as a prominent researcher and academic in the fields of geospatial information science and technology. He has been involved in various aspects of geospatial data analysis, geographic information systems (GIS), and related technologies. His work often emphasizes applications of geospatial science in urban planning, environmental management, and public health, among other areas.

Vassilios Lakon does not appear to be widely recognized in prominent fields such as literature, science, or popular culture as of my last update in October 2023. It's possible that he is a private individual, a less widely known figure, or an emerging personality in a specific domain.

Jagadish Chandra Bose (1858–1937) was an Indian polymath, physicist, biologist, botanist, archaeologist, and writer. He is best known for his pioneering work in the field of radio and microwave optics, as well as for his contributions to plant physiology. Bose is often credited with laying the foundations of modern science in India and is regarded as one of the first scientists to demonstrate the existence of radio waves and their use in communication.

George Francis FitzGerald (1851–1901) was an Irish physicist best known for his contributions to the field of theoretical physics, particularly in the areas of electromagnetism and the theory of relativity. He is often remembered for FitzGerald's contraction hypothesis, which he proposed independently around the same time as the Lorentz transformation was developed by Hendrik Lorentz.

Augusto Righi was an Italian physicist known for his contributions to the field of electromagnetism in the late 19th and early 20th centuries. He is particularly recognized for his work on the behavior of electric and magnetic fields and his studies of electromagnetic waves. Righi's experiments helped to advance the understanding of electromagnetic radiation, and he was notable for his investigations into the properties of radio waves.

Józef Łukaszewicz could refer to several individuals, but there isn't a widely recognized or prominent figure by that name in historical or contemporary contexts based on data available up until October 2023.

A. Brooks Harris could refer to a variety of things, such as a person’s name, an author, or a fictional character. However, without more specific context, it’s difficult to provide a precise answer. If you can provide additional details or clarify the context in which you are asking about A.