Donald Caspar is a notable figure in the field of structural biology and biochemistry, particularly known for his work on viruses and protein structures. He is best known for his contributions to understanding the structure of viral capsids and other macromolecules using techniques such as X-ray crystallography and electron microscopy. His work has significantly advanced the understanding of how virus structures relate to their function and has implications in vaccine development and virology.

Radioactive contamination refers to the presence of radioactive materials in or on surfaces, objects, or living organisms, where such materials are not naturally occurring or are in quantities that pose health or environmental risks. This contamination can arise from various sources, including nuclear accidents, improper disposal of radioactive waste, medical treatments, and industrial activities involving radioactive substances. Radioactive materials emit radiation, which can be harmful to human health and the environment.

Drenthe is a province located in the northeastern part of the Netherlands. Known for its rural landscape, Drenthe features a mix of forests, heathlands, and agricultural areas. The province is notable for its prehistoric sites, including the dolmens or "hunebedden," which are ancient burial mounds made of large stones, dating back to the Neolithic period. The regional capital of Drenthe is Assen, which is also known for hosting the annual TT motorcycle race.

The Droste effect is a visual and artistic phenomenon in which an image contains a smaller version of itself, recursively appearing within itself. This creates a sense of infinite depth or a self-referential loop. The name originates from a specific type of packaging used in the early 20th century for Droste cocoa powder, which featured an illustration of a nurse holding a tray that included a cocoa cup with an image of the same nurse holding the same tray.

Dual representation refers to the ability to understand and represent the same information in different ways or formats. This concept is often discussed in various fields, including psychology, education, and cognitive science, particularly in relation to learning and comprehension. In the context of cognitive development, particularly in children, dual representation is exemplified by the ability to understand that a model or symbol (such as a map or a scale model) can represent something else in the real world.

Dudley Shapere is not a widely recognized term or name as of my last knowledge update in October 2023. However, it might refer to Dudley Shapere, an American philosopher known for his work in the philosophy of science, particularly in the areas of scientific explanation and methodology.

Dynamic Scattering Mode (DSM) is a technique primarily used in the field of liquid crystal displays (LCDs) and other optical devices. It involves the manipulation of light scattering behavior in a material or device to achieve desired optical properties, such as contrast or light modulation. When a voltage is applied to a liquid crystal material in DSM, the alignment of the liquid crystal molecules changes dynamically.

Rafael Antonio Curra does not appear to be a widely recognized figure or term in public knowledge as of my last update in October 2023. It's possible that he could be a private individual, a professional in a specific field, or a recent public figure or event that gained attention after my last update.

Global radiology refers to the practice of radiology conducted in a global context, often characterized by a collaborative approach that leverages technology, expertise, and resources across different geographic regions. This concept encompasses several aspects: 1. **Remote Consultations**: Radiologists from different parts of the world can provide their expertise remotely, offering interpretations of imaging studies such as X-rays, MRIs, and CT scans. This is particularly useful in areas with limited access to specialized radiological services.

Gloria E. Anzaldúa (1942-2004) was a prominent Chicana feminist, queer theorist, and writer known for her influential work in the fields of cultural criticism, border theory, and identity politics. She played a crucial role in the development of Chicana literature and was a key figure in the feminist movement, particularly in exploring the intersection of race, gender, sexuality, and culture.

The "empty delta sign" often refers to a specific symbol used in various fields, such as mathematics, physics, and engineering. However, the term itself can be a bit ambiguous without context. Below are a few interpretations: 1. **Delta Symbol (Δ)**: In mathematics and physics, the delta symbol (Δ) is used to represent change or difference. For example, Δx might denote a change in the variable x.

An elongated square bipyramid is a type of polyhedron that belongs to the category of bipyramids. It can be understood as an extension of a square bipyramid, which is formed by joining two square pyramids at their bases. The elongated version is created by extending or elongating this shape along the vertical axis, which essentially involves the addition of two additional triangular faces on opposite sides of the original square bipyramid structure.

Elmer and Elsie are educational robots developed by researchers to engage students in learning about robotics, programming, and problem-solving. They are often used in educational settings to help teach concepts related to computer science, engineering, and mathematics in an interactive and hands-on manner. Elmer and Elsie can be configured or programmed to perform various tasks, and they serve as a tool for encouraging creativity and critical thinking among students.

As of my last update in October 2023, "Emilia Currás" does not appear to refer to a widely recognized figure, concept, or entity. It might be a lesser-known individual, a character from a work of fiction, or a term specific to a niche interest or location.

A Bandwidth Broker is a service or platform that facilitates the buying, selling, and management of bandwidth resources in a network. The main purpose of a bandwidth broker is to optimize the use of network resources by connecting those who have excess bandwidth to those who need it. This can apply to various contexts, including Internet service providers (ISPs), cloud service providers, content delivery networks (CDNs), and enterprise networks.

The Bangkok Doll Museum, also known as the "Bangkok Doll Factory and Museum," is a unique cultural attraction located in Bangkok, Thailand. It showcases a vast collection of dolls, many of which are handcrafted and representative of various cultures and traditions. The museum features dolls from Thailand and other parts of the world, highlighting the artistic craftsmanship involved in doll-making.

The Barabási–Albert (BA) model is a preferential attachment model for generating scale-free networks, which are networks characterized by a degree distribution that follows a power law. This model was proposed by Albert-László Barabási and Réka Albert in their seminal 1999 paper. ### Key Features of the Barabási–Albert Model: 1. **Network Growth**: The BA model creates networks by starting with a small number of connected nodes and adding new nodes over time.

Barbara Sherwood Lollar is a Canadian geologist renowned for her work in the field of Earth Sciences, particularly in the study of groundwater and the geological processes that affect it. She has made significant contributions to our understanding of the origins and movement of water in the Earth's crust, as well as the implications for life in extreme environments, such as deep underground ecosystems.

Bareiss Prüfgerätebau GmbH is a company that specializes in the development and manufacture of testing and measuring equipment, particularly in the field of material testing. Founded in Germany, the company is known for its innovative solutions in quality assurance and testing for various industries, including rubber, plastics, and materials science. Their product range typically includes devices for hardness testing, thermal analysis, and other forms of material testing and analysis.

Barnette's conjecture is a proposition in the field of combinatorial geometry, specifically concerning polyhedra. It states that for a polyhedron with \( n \) vertices, the number of faces \( f \) must satisfy the inequality: \[ f \leq 2n - 4 \] This conjecture essentially posits an upper bound on the number of faces in a convex polyhedron based on its number of vertices.