The term "gun data computer" typically refers to a specialized system used in military applications, particularly in naval or air defense operations. These systems are designed to process and analyze data related to firearms, artillery, missiles, or other weaponry. They typically carry out functions such as: 1. **Ballistics Calculations**: Calculating trajectories, range, and other parameters to improve accuracy in targeting.

Gustav Hahn could refer to various individuals, but there is no widely recognized public figure or notable event specifically associated with that name in mainstream knowledge as of my last update in October 2023. It's possible you might be referring to someone lesser-known or a fictional character from a book, movie, or other media.

The Hadley cell is a large-scale atmospheric circulation pattern that occurs in the tropics. It is named after the British meteorologist George Hadley, who described it in the 18th century. The Hadley cell is characterized by the following features: 1. **Warm Air Rising**: Near the equator, intense solar heating warms the surface air, causing it to rise. As air rises, it cools and expands, leading to the formation of clouds and precipitation.

The Hagen–Poiseuille equation is a fundamental equation in fluid mechanics that describes the laminar flow of an incompressible and Newtonian fluid through a cylindrical pipe. It is used to calculate the volumetric flow rate of the fluid based on a few key parameters.

Hal Anger refers to a specific type of radiation detection technology developed in the 1950s by physicist Hal Anger. The device is known as the "Anger camera," or more commonly, the "gamma camera." The Anger camera is used in nuclear medicine to visualize the distribution of radioactive materials in the body. It detects gamma rays emitted from a radiopharmaceutical administered to a patient, allowing for diagnostic imaging of various conditions.

Hammond's postulate is a principle in physical organic chemistry that relates the structure of a transition state in a chemical reaction to the structure of the reactants and products. It was proposed by the chemist George S. Hammond in the 1950s.

Hanhee Paik is a name that may refer to various individuals, but without more context, it is difficult to determine exactly who you are asking about. One notable figure is Hanhee Paik, a South Korean artist known for their work in contemporary art, often focusing on themes of identity and culture.

Harald Rose is a notable German physicist known for his contributions to the field of electron microscopy. He is particularly recognized for his work in the development of high-resolution transmission electron microscopy (HRTEM). Rose's innovations have significantly improved the imaging capabilities of electron microscopes, allowing for greater detail and resolution in the study of materials at the atomic level. In addition to his scientific contributions, Rose is also known for his work in education and collaboration with various research institutions.

Hans von Ohain was a German engineer and physicist best known for his work in the development of jet propulsion technology. He was born on January 14, 1911, and passed away on March 13, 2021. Von Ohain played a crucial role in the invention of the jet engine, independently of Sir Frank Whittle in the United Kingdom.

Harald Niederreiter is an Austrian mathematician known for his work in number theory, particularly in the areas of algebra, coding theory, and quasi-Monte Carlo methods. He has made significant contributions to the field of numerical integration and the development of algorithms for high-dimensional analysis. Niederreiter is also associated with the study of polynomial interpolation and has published numerous papers and books on these topics. His work has applications in various fields, including finance, statistics, and computer science.

Harald Schwefel is not a widely recognized figure as of my last update in October 2023, and there are no notable references or significant information readily available about a person by that name. It's possible that he could be a private individual, or a professional in a specific field not widely covered in mainstream media or literature.

As of my last knowledge update in October 2021, Harold Lichtenberger does not appear to be a widely recognized public figure, event, or term. It's possible that he is a private individual or a professional with limited public exposure.

As of my last knowledge update in October 2021, "Harry Kroger" does not appear to refer to a prominent figure or a widely recognized term in popular culture, history, or any specific field. It's possible that it could be a fictional character, a niche reference, or a name that has gained significance after my last update.

A Hearing Protection Device (HPD) is a device designed to protect the wearer's hearing from harmful noise levels. These devices are used in environments where noise exposure can lead to hearing loss or other auditory issues, such as construction sites, factories, shooting ranges, and musical performances. HPDs come in various forms, including: 1. **Earplugs**: Small plugs made from soft materials that can be inserted into the ear canal to block sound.

Hermann Hankel was a German mathematician who made significant contributions to the field of algebra, particularly in the study of algebraic structures and the foundation of modern algebraic theories. He is perhaps best known for his work on the theory of determinants and contributions to the development of the concept of a group. Hankel's work laid groundwork for the further development of algebra and influenced later mathematicians.