DSS, or 2,2-Dimethyl-2-silapentane-5-sulfonic acid, is a chemical compound commonly used as a reference standard in nuclear magnetic resonance (NMR) spectroscopy, particularly in the field of organic chemistry and biochemistry. DSS is particularly valuable because it is soluble in water and organic solvents, making it suitable for a wide range of applications.

The Dover Strait coastal guns refer to a series of coastal artillery installations located along the cliffs and shores of the Dover Strait, which separates England from mainland Europe. These guns were primarily used during World War II to protect against potential naval invasions and to secure the Strait, which is a critical shipping lane and a strategic military passage. Historically, the coastal defenses included large-caliber naval guns installed on both the British and French sides of the Strait.

Dovetail rail is a type of structural element often used in various construction and manufacturing applications, particularly in the context of rail systems and sliding mechanisms. The term "dovetail" refers to a specific joint design that resembles the shape of a dove's tail, which provides a strong and stable connection between two elements.

"Drift plus penalty" typically refers to a concept found in fields like machine learning, statistics, or control systems, particularly when addressing the robustness and performance of algorithms in varying conditions. Here's a breakdown of the components of this concept: 1. **Drift**: In statistical terms, "drift" often refers to the gradual change in a system or process over time, which can lead to performance degradation if not accounted for.

The Dr. Neil Trivett Global Atmosphere Watch Observatory is associated with the Global Atmosphere Watch (GAW) program, which is managed by the World Meteorological Organization (WMO). GAW aims to provide long-term, high-quality observations of the atmosphere and its constituents to better understand atmospheric processes and changes, particularly those related to climate change and air quality. The observatory is named in honor of Dr.

The shortest path problem is a fundamental problem in graph theory and computer science that involves finding the shortest path or minimum distance between two nodes (vertices) in a graph. Graphs can be directed or undirected, weighted or unweighted, and the shortest path can be defined in terms of the smallest sum of weights of the edges traversed.

Dry lubricants are substances applied to reduce friction between surfaces in contact without the use of liquid lubricants like oils or greases. They typically come in the form of powders or solid films and work by providing a low-friction interface between sliding surfaces. Some common types of dry lubricants include: 1. **Graphite**: A form of carbon that is known for its excellent lubricating properties, especially at high temperatures.

Nasreddin in Bukhara refers to the legendary character Nasreddin Hodja, a popular figure in Middle Eastern and Central Asian folklore. In this context, Bukhara, a historic city in Uzbekistan, is one of the many places where stories and anecdotes about Nasreddin are shared and celebrated. Nasreddin is often depicted as a wise fool or a sage who uses humor and wit to impart lessons and offer commentary on human nature and societal issues.

Dual X-ray Absorptiometry (DXA or DEXA) is a medical imaging technique primarily used to measure bone mineral density (BMD). It employs two X-ray beams with different energy levels to assess the amount of bone in a specific area, typically the spine, hip, or wrist. DXA is widely regarded as a standard method for diagnosing osteoporosis and determining fracture risk, as well as for monitoring bone density changes over time, especially in patients undergoing treatment for bone-related conditions.

A "dunam" (also spelled "dunam" or "dunum") is a unit of area that is commonly used in some Middle Eastern countries, particularly in the context of land measurement. Its size can vary by country, but it is generally understood to be equivalent to 1,000 square meters (or 0.1 hectares).

Duration Calculus (DC) is a formal mathematical framework used for specifying and reasoning about the timing and duration of events in real-time systems. It is particularly useful in the fields of computer science, especially in the design and analysis of real-time systems, where timing constraints are crucial. Introduced by K. J. C. (Kim) V. A.

A Radioisotope Piezoelectric Generator (RPEG) is a type of power generation device that combines principles from both radioisotope thermoelectric generators (RTGs) and piezoelectric technology. The main components and their functions can be outlined as follows: 1. **Radioisotope Source**: The generator uses a radioisotope, commonly radioactive isotopes like cesium-137 or strontium-90, which emits radiation as it decays. This radioactive decay generates heat.

A Denso mapcode is a location-based identifier used primarily in Japan to facilitate navigation and mapping. It is a numeric code that corresponds to a specific geographic area and can be used to pinpoint locations on maps, making it easier for users to find destinations without needing traditional addresses. The Denso mapcode system is particularly popular for use in vehicles equipped with GPS navigation systems, as it allows drivers to input these codes for quick access to directions.

As of my last knowledge update in October 2023, there isn't widely available information on an individual named Ebadollah S. Mahmoodian in prominent public databases or within notable news sources. He might be a professional or academic figure in a specific field that hasn't received widespread recognition or coverage in global media.

The Dynamical Theory of Diffraction is a theoretical framework used to understand the scattering of waves, particularly X-rays and electrons, by crystalline materials. It provides a more comprehensive picture than the earlier kinematic theories, as it takes into account the multiple scattering effects that occur when waves interact with a periodic structure, such as a crystal lattice. ### Key Concepts: 1. **Wave Interaction with Crystals**: When waves interact with a periodic structure, they can be diffracted in various directions.

Earl D. Shaw may refer to a person, but without additional context, it's challenging to provide specific information. There may be multiple individuals with that name in various fields or areas of expertise. If you can provide more context or details about who Earl D.

Earle Hesse Kennard was an American artist, art historian, and educator known for his contributions to the field of art education and his work in various artistic mediums. However, detailed and specific information about him may be limited or not well-documented.

Earth and Planetary Science Letters (EPSL) is a peer-reviewed scientific journal that publishes research articles and reviews in the fields of Earth sciences and planetary sciences. It covers a broad range of topics including geology, geophysics, mineralogy, geochemistry, and planetary processes related to both the Earth and other celestial bodies in the solar system. The journal is known for its interdisciplinary approach, promoting the integration of different scientific perspectives to advance the understanding of Earth and planetary systems.

Global Maritime Situational Awareness (GMSA) refers to the comprehensive understanding of maritime activities and conditions across the world's oceans and waterways. This situational awareness is critical for a variety of stakeholders, including government agencies, military organizations, maritime companies, and environmental groups.

The Econometric Society is an international organization devoted to the advancement of economic theory in its relation to statistics and mathematics. Founded in 1930 by a group of prominent economists and statisticians, the society aims to promote the study and dissemination of econometrics— the application of statistical and mathematical methods to economic data and economic theories.