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.

A **normal subgroup** is a special type of subgroup in the context of group theory, which is a branch of abstract algebra. Let's define it more precisely. Given a group \( G \) and a subgroup \( N \) of \( G \): 1. **Subgroup**: A subgroup \( N \) must itself be a group under the operation defined on \( G \).

Mikhail Subbotin is not widely known, and without more context, it's difficult to provide specific information.

Nicolaas Bloembergen was a Dutch physicist known for his work in the field of laser science and spectroscopy. Born on March 11, 1920, he received the Nobel Prize in Physics in 1981, along with Arthur Leonard Schawlow and Kai M. Ziegler, for their contributions to the development of laser technology. Bloembergen's research significantly advanced the understanding of light-matter interactions and the development of various spectroscopic techniques.

Nora Cate Schaeffer is an American sociologist known for her work in the fields of demographic research, social psychology, and survey methodology. She has contributed significantly to the understanding of social stratification, family dynamics, and the impacts of social networks on individual behavior and experiences. Schaeffer has also been involved in improving survey techniques and understanding how social context affects survey responses.

The Northrop Grumman RQ-180 is a highly classified unmanned aerial vehicle (UAV) developed for the United States military. It is believed to be part of the U.S. Air Force’s program for advanced reconnaissance and surveillance missions, particularly in contested or denied airspace environments. While specific details about the RQ-180 are not publicly available due to its classified nature, it is understood to be designed for stealth capabilities, allowing it to evade detection by radar and other sensors.

A binary prefix is a standardized set of units that represent quantities of digital information, using powers of two. These prefixes are based on the binary numeral system, which is the foundation of computer science and digital electronics. They help in expressing large data sizes in a more manageable and comprehensible way. The International Electrotechnical Commission (IEC) established a set of binary prefixes to avoid confusion with decimal (SI) prefixes.

As of my last update in October 2023, Paul Häberlin is not a widely recognized figure in popular culture or mainstream media. It is possible that he could be a private individual, an emerging artist, or someone known in a specific niche or community.

High-explosive incendiary (HEI) and armor-piercing (AP) ammunition are specialized types of munitions designed for specific tactical purposes. ### High-Explosive Incendiary (HEI) Ammunition: HEI ammunition combines explosive and incendiary effects. It is typically designed to achieve the following: - **Explosive Effect:** When the projectile detonates, it releases a significant amount of energy, causing damage through a blast wave and fragmentation.

Japanese naval codes refer to the various systems of encryption and communication used by the Imperial Japanese Navy, particularly during World War II. These codes were crucial for secure communication between ships, submarines, and naval bases. Here are a few key points related to Japanese naval codes: 1. **JN-25 Code**: The most well-known Japanese naval code was JN-25, which was a complex code used primarily for naval communications.

John P. Hayes is a notable figure in the field of electrical engineering, specifically known for his work in digital signal processing and systems. He is also recognized for his contributions to the development of computer engineering and technology education. Hayes has authored several textbooks and academic papers that are widely used in engineering curricula. If you're looking for a specific aspect of John P. Hayes' work or contributions, please provide more details!

A reciprocating pump is a type of positive displacement pump that uses a back-and-forth (reciprocating) motion to move fluid. This motion is typically achieved using a piston, diaphragm, or plunger that moves within a cylinder. The fundamental operation of a reciprocating pump involves the following key components: 1. **Piston/Plunger/Diaphragm**: The reciprocating element that moves back and forth to draw in and expel fluid.

As of my last update in October 2023, "Reich Technologies" could refer to various entities or companies, but there isn't a widely recognized company by that exact name that stands out on a global scale. It's possible that Reich Technologies could refer to a tech company, startup, or a specific technology-focused organization that operates in a niche market, potentially in areas like software development, IT services, or technology consulting.

Rick Reichmuth is an American meteorologist and television personality, best known for his work as a weather anchor on Fox News Channel. He has gained recognition for his engaging presentations of weather reports and has appeared on various Fox News programs, providing updates and forecasts. In addition to his work in meteorology, Reichmuth has also made appearances in other media formats, and he has been involved in outdoor lifestyle projects, including travel and adventure segments.

Seasonal effects on suicide rates refer to the patterns and fluctuations in suicide incidence that correspond to different times of the year. Research has shown that there are indeed seasonal trends in suicide rates, although these can vary by geographic location, cultural factors, and individual circumstances. Here are some key points related to seasonal effects on suicide rates: 1. **Seasonality**: Certain studies have found that suicide rates tend to increase during specific seasons.