Frank Ellison could refer to different subjects depending on the context, but he is most notably recognized as a significant figure in the field of American radio and television. He was a pioneer in radio drama and is often credited as one of the creators of the first successful radio soap operas. His work in audio storytelling influenced many aspects of broadcasting.

George Sellios is an American model builder and owner of Fine Scale Miniatures, a company renowned for its highly detailed model kits and accessories, particularly focused on the railroad and diorama hobby. Sellios is celebrated for his craftsmanship and attention to detail in creating realistic miniature scenes, often reflecting historical themes and urban settings. His work is highly regarded in the model railroading community, and he has contributed significantly to the popularity of detailed, scale modeling through his kits and techniques.

Stephen Arnold is a physicist and engineer known for his work in the field of optics and photonics. He has made significant contributions to areas such as fiber optics, lasers, and the development of optical devices. His research has applications in telecommunications, medicine, and various technologies that rely on light manipulation.

Numerical linear algebra is a branch of mathematics that focuses on the development and analysis of algorithms for solving problems in linear algebra using numerical methods. It deals with the theory and practical application of techniques for the manipulation of matrices and vectors, which are fundamental structures in many scientific computing and engineering problems.

Iain Rice is a name that could refer to multiple individuals, but he is most commonly known as a British author and speaker, particularly in the field of model railroading. Rice has written numerous books and articles on the subject, providing insights into modeling techniques, history, and project ideas for enthusiasts.

As of my last knowledge update in October 2023, John H. Ahern does not directly refer to a widely recognized public figure or concept. It is possible that he is an academic, a professional in a specific field, or a private individual not widely known outside of specific contexts. If you meant someone else or were referring to a specific work or context involving John H.

Levon Kemalyan is the name of an Armenian artist known for his work in various mediums, including painting and design. He is particularly recognized for his contributions to contemporary art and his exploration of themes related to culture and identity.

Merv Smith is a retired Australian sports broadcaster known for his work in radio and television, particularly in covering Australian rules football. He gained recognition for his engaging style and insightful commentary. Over his career, he has been associated with various media outlets and has contributed significantly to the sports broadcasting landscape in Australia. In addition to his work in AFL broadcasting, Smith has also been involved in various sports and community initiatives.

Pete Waterman is a British music producer, songwriter, and radio DJ, best known for his work in the 1980s and 1990s. He is a key figure in the pop music scene, particularly associated with the Stock Aitken Waterman (SAW) production team, which produced numerous hits for various artists. The team was known for its catchy pop songs and played a significant role in shaping the sound of pop music in the UK during that era.

The Ragsdale conjecture is a statement in the field of mathematics, specifically in real algebraic geometry and combinatorial geometry. Proposed by R. H. Ragsdale in 1916, the conjecture pertains to the maximum number of regions into which a certain type of hyperplane arrangement can divide Euclidean space. More specifically, the conjecture deals with the number of regions formed in three-dimensional space by the intersections of a set of hyperplanes.

A semialgebraic set is a subset of a Euclidean space that can be defined using polynomial equations and inequalities.

Ernő Rubik is a Hungarian architect and professor of architecture, best known as the inventor of the Rubik's Cube, a 3D combination puzzle that became an iconic toy worldwide. He created the Rubik's Cube in 1974 as a teaching tool to help students understand spatial relationships. The cube gained international popularity in the 1980s and has since become one of the best-selling puzzles of all time.

Rod Stewart is a British rock and pop singer and songwriters, known for his distinctive raspy voice and a career that has spanned several decades since the 1960s. He gained fame as a solo artist and through his work with various bands, including The Faces.

The term "30-inch railways" typically refers to narrow-gauge railways that have a track gauge of 30 inches (approximately 76.2 cm). Narrow-gauge railways are often used in mountainous areas or for industrial purposes where tighter curves and steeper gradients can be accommodated compared to standard gauge railways.

Maurice Kraitchik was a prominent mathematician, particularly known for his work in the field of number theory and recreational mathematics. He was born on November 21, 1894, in the Russian Empire and passed away on January 14, 1957. Kraitchik is often recognized for his contributions to various mathematical problems and for promoting the enjoyment of mathematics through puzzles and games.

Digital model train control refers to a system used to control model trains using digital signals instead of traditional analog methods. This technology has become popular among model railroad enthusiasts because it provides greater flexibility, functionality, and convenience in controlling train layouts. ### Key Features of Digital Model Train Control: 1. **DCC (Digital Command Control)**: One of the most common standards for digital model train control is DCC. This system allows multiple trains to be controlled independently on the same track.

Model railroad scales refer to the size ratios used to represent real-world trains and railroads in miniature form. Essentially, each scale indicates how much smaller the model is compared to the actual prototype. Different scales are popular for various reasons, including space, detail, and realism. Here are some common model railroad scales: 1. **N Scale (1:160)**: This is a small scale that allows for complex layouts in a limited space.

Model railroads are miniature versions of rail systems that enthusiasts create for hobby or display purposes. They typically consist of scaled-down models of trains, tracks, landscapes, buildings, and other elements found in real railroad operations. Model railroading involves various aspects such as design, building, and operating these miniature systems, and it can encompass a wide variety of scales (sizes), from HO scale (1:87) to N scale (1:160) and larger gauges like G scale.

Narrow gauge railway modelling refers to the hobby of creating scale models of narrow gauge railways, which are railways that use tracks with a smaller than standard distance between the rails. Standard gauge is typically 4 feet 8.5 inches (1,435 mm), while narrow gauge can range from as little as 15 inches (381 mm) up to 3 feet (914 mm).