Uranium–uranium dating is a geochronological technique used to determine the age of materials, particularly rocks and minerals, by measuring the ratio of uranium isotopes present within them. This method is based on the radioactive decay of uranium isotopes, primarily uranium-238 (U-238) and uranium-235 (U-235), into stable lead isotopes over time.

Cherry Valley O-scale refers to a specific model railroading scale and the products associated with it, particularly those produced by Cherry Valley Models. In model railroading, "O scale" typically denotes a scale ratio of 1:48, meaning that one unit on the model represents 48 units in real life. This scale is popular among enthusiasts for its detail and the ability to create intricate layouts.

Rubidium-strontium (Rb-Sr) dating is a radiometric dating technique that is used to determine the age of rocks and minerals by measuring the decay of rubidium-87 (Rb-87) to strontium-87 (Sr-87). This method relies on the principles of radioactive decay, where a parent isotope (in this case, Rb-87) decays into a stable daughter isotope (Sr-87) over time at a known rate.

The Historical Model Railway Society (HMRS) is an organization based in the United Kingdom that focuses on the promotion and preservation of the history and heritage of railways, particularly through the medium of model railways. Founded in 1960, the HMRS aims to provide resources, support, and a community for railway enthusiasts, historians, and modelers.

The National Model Railroad Association (NMRA) is an organization founded in the United States in 1935 that is dedicated to promoting the hobby of model railroading. The NMRA serves as a resource for hobbyists, manufacturers, and educators, providing standards, guidelines, and recommendations to enhance the model railroading experience.

The Tech Model Railroad Club (TMRC) is a well-known student organization based at the Massachusetts Institute of Technology (MIT). Founded in the 1950s, the club is dedicated to model railroading and promotes a hands-on learning experience in engineering, electronics, and design through the construction and operation of model train layouts. TMRC is particularly notable for its creativity and innovation, often incorporating various technologies into their setups.

British Railway Modelling is a hobby that involves creating scale models of British railways, trains, and related infrastructure. Enthusiasts often build dioramas or railway layouts that replicate real or fictional scenes from Britain's railway history. This hobby combines elements of design, engineering, and artistry, as modellers work on constructing realistic landscapes, buildings, and train systems.

Eisenbahn Kurier is a German magazine that focuses on railways and trains. It covers a wide range of topics related to rail transport, including news, technical details, historical perspectives, and contemporary issues in the railway industry. The magazine is popular among railway enthusiasts, historians, and professionals in the field, providing insights into both German rail systems and international railway developments. It includes features on model trains, rail operations, and reviews of railway technology and equipment.

Indeterminism is a philosophical concept asserting that not all events in the universe are determined by prior causes or conditions. In other words, it is the idea that some events can occur without being predetermined by preceding factors, allowing for randomness or chance to play a role in the unfolding of events. In the context of philosophy and metaphysics, indeterminism challenges determinism, which holds that every event or state of affairs is the result of preceding events in accordance with the laws of nature.

The International Random Film Festival (IRFF) is a film festival that focuses on showcasing independent and short films from around the world. Unlike traditional film festivals that may prioritize certain genres or established filmmakers, the IRFF emphasizes creativity and innovation, often encouraging experimental and unconventional storytelling. Typically, festivals of this nature offer a platform for emerging filmmakers to gain exposure, connect with audiences, and network with other industry professionals.

Model railroading is a popular hobby that involves the creation and operation of miniature train layouts. Enthusiasts build and operate scale models of trains, tracks, and landscapes, often setting up intricate scenes that can include everything from realistic terrain and buildings to figures and vehicles. Here are some key aspects of this hobby: 1. **Scale Models**: Model railroads are built to specific scales, which determine the size of the models in relation to real trains.

Live steam and outdoor railroading is a hobby that involves the operation of miniature steam locomotives and railroads outdoors. It combines model railroading with the use of actual steam power, creating a unique and immersive experience for enthusiasts. Here are some key elements: ### Live Steam - **Scale Models**: Live steam locomotives are typically built to a scale of 1:8 or 1:12, but other scales can be found.

Model Railroader is a popular magazine focused on the hobby of model railroading. It has been published since 1934 and serves as a resource for hobbyists of all levels, from beginners to experienced model railroaders. The magazine features articles about various aspects of the hobby, including modeling techniques, product reviews, layout design, and operations. It also showcases real-world railroads, offers tips for building and painting models, and discusses the latest trends and products in the industry.

Railroad Model Craftsman is a magazine and publication dedicated to the hobby of model railroading. It serves as a resource for hobbyists, offering articles, tips, and instructional content on various aspects of model railroading, including layout construction, scenery creation, and model building. The magazine often features detailed project ideas, product reviews, and profiles of impressive model railroads and their builders.

NTrak is a model railroading concept focused on N scale (1:160) model trains. It is a modular layout system that allows individuals to build and display their own sections of track and scenery, which can be connected with sections created by other modelers. This modularity enables enthusiasts to create large, visually diverse layouts for exhibitions and shows.

`/dev/random` is a special file in Unix-like operating systems that serves as a source of cryptographically secure random numbers. Here are some key points about `/dev/random`: 1. **Randomness Source**: It provides random data generated by the operating system, which collects environmental noise from the computer's hardware (such as mouse movements, keyboard timings, and other system events) to ensure that the generated numbers are unpredictable.

Diceware is a method for creating strong, memorable passphrases using dice. It was developed by Arnold G. Reinhold and is based on the principle of generating random words to create a secure and easy-to-remember password. The process typically involves the following steps: 1. **Dice Rolling**: You roll a set of dice (usually five) to generate random numbers. Each roll corresponds to a unique combination of numbers.