As of my last update in October 2023, Martin Hoek is not a widely recognized individual or term associated with significant events or phenomena. It is possible that he could be a private individual, a relatively obscure figure, or a topic that has gained relevance after my last update.

Gaston Planté was a French engineer and inventor, best known for creating the first rechargeable lead-acid battery in 1859. His invention laid the foundation for modern battery technology. The Planté battery featured lead electrodes and sulfuric acid as the electrolyte, which allowed it to be recharged and reused multiple times, unlike the primary (non-rechargeable) batteries that were available at the time.

Eugen von Lommel is a German physician and researcher known for his work in the field of near-death experiences (NDEs). He has conducted research and written extensively on the phenomenology of NDEs, exploring their implications for understanding consciousness and the nature of life after death. His work often combines scientific inquiry with a philosophical perspective on the experiences of individuals who have had NDEs.

Louis Daguerre (1787–1851) was a French artist and photographer, best known for his invention of the daguerreotype, one of the first practical methods of photographic imaging. He collaborated with Joseph Nicéphore Niépce, who created one of the earliest known photographs, but after Niépce's death, Daguerre continued to develop the process on his own.

Marie Curie refers to Marie Curie (1867–1934), a pioneering physicist and chemist known for her groundbreaking research on radioactivity. She was the first woman to win a Nobel Prize and remains the only person to win Nobel Prizes in two different scientific fields: Physics (1903, which she shared with her husband Pierre Curie and Henri Becquerel) and Chemistry (1911).

Pierre Curie (1859–1906) was a French physicist best known for his work on radioactivity, a term that he coined. He was born in Paris and developed a strong interest in science from an early age. Along with his wife, Marie Curie, he conducted groundbreaking research on radioactive elements, particularly on polonium and radium.

As of my last knowledge update in October 2023, Caspar Isenkrahe does not appear to be a widely recognized figure or term in public discourse, media, or literature. It's possible that it may refer to a lesser-known individual, a fictional character, or a specific term from a niche subject area.

Heinrich Wilhelm Dove was a prominent German meteorologist and physicist known for his contributions to the field of meteorology. He was born on January 18, 1803, and passed away on March 4, 1879. Dove is particularly recognized for his work on atmospheric phenomena and for formulating the concept of the "Dove's Law," which describes the behavior of air masses and their interactions.

Wilhelm Eduard Weber (1804-1891) was a German physicist and a significant figure in the field of electromagnetism. He is best known for his work in developing Weber’s law, as well as his contributions to the understanding of electrical measurements and the relationship between electricity and magnetism. Along with his notable contemporaries, such as Carl Friedrich Gauss, Weber conducted important experiments and formulated theories that laid the groundwork for electromagnetic theory.

Johann Christian Poggendorff (1796–1877) was a German physicist and an important figure in the field of electrical engineering. He is best known for his work in the study of galvanism and electromagnetism. Poggendorff is also known for editing the "Annalen der Physik und Chemie," a prominent scientific journal, which significantly contributed to the dissemination of scientific knowledge during his time.

Moritz Ludwig Frankenheim was a 19th-century German mathematician known for his work in the field of mathematical analysis. He made contributions to various areas of mathematics, including functions of real variables and complex analysis. Frankenheim is perhaps best remembered for his emphasis on mathematical rigor and precision, as well as for his role in the development of certain mathematical theories during that period.

Wolfgang Sellmeier is a notable German physicist known primarily for his work in the field of optics and material science. He gained significant recognition for formulating the Sellmeier equation, which describes the refractive index of optical materials as a function of wavelength. This equation is particularly important in designing lenses and optical systems, as it allows for precise predictions of how light will behave when passing through different materials. The Sellmeier equation is widely used in the fields of photonics and laser technology.

Dimitrios Stroumpos may refer to a specific individual or a name associated with various contexts, but as of my last update in October 2021, there isn't widely recognized information or publicly available context about someone by that name. It's possible that he could be a private individual, an emerging public figure, or related to a specific profession or field not covered by major sources.

Hemendranath Tagore (1859–1915) was a prominent Bengali artist, musician, and painter who belonged to the famous Tagore family of Kolkata. He was the younger brother of the illustrious poet Rabindranath Tagore, who was awarded the Nobel Prize in Literature in 1913. Hemendranath was known for his contributions to various forms of art.

Abraham Klein (born April 11, 1932) is a notable theoretical physicist known for his contributions to quantum field theory and the study of particle physics. He has made significant contributions to the understanding of hadronic interactions and is recognized for his work on the mathematical foundations of quantum mechanics. Klein is also known for his involvement in the development of various theoretical frameworks and models that describe fundamental forces and particles. He has published numerous papers and collaborated with many prominent physicists throughout his career.

August Witkowski may refer to various individuals or contexts, but there isn't a widely known figure or subject by that name up to my last knowledge update in October 2023. If you have more specific information or a context in which August Witkowski is relevant—such as a field (like sports, literature, or science)—I might be able to provide more relevant information.

Karol Olszewski (1846–1915) was a notable Polish chemist, recognized primarily for his contributions to the field of low-temperature physics and for being one of the pioneers of cryogenics. He was a key figure in the liquefaction of oxygen and other gases, which laid the groundwork for advancements in both scientific research and various industrial applications.

The Schur product theorem is a result in linear algebra related to matrices and their positive semi-definiteness. It establishes a relationship between the Schur product (or Hadamard product) of two matrices and the positive semi-definiteness of those matrices.

Gabrio Piola was an influential Italian mathematician and engineer known for his contributions to the fields of mechanics and continuum mechanics. He is particularly noted for the development of the Piola-Kirchhoff stress measures in continuum mechanics, which are used to describe the stress state in deformable bodies. The Piola-Kirchhoff stress tensors are important in the analysis of materials and structures under deformation and are particularly useful in finite element analysis.

Giovanni Caselli was an Italian inventor and engineer best known for his contributions to the early development of the telegraph and photography. He is most notably recognized for inventing the "pantelegraph," a device that could transmit written documents over long distances using telegraph lines, effectively allowing for the remote copying of images and text. Caselli's work in telecommunications was significant in the 19th century, as it helped lay the groundwork for future advancements in communication technology.