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.

A location-based game (LBG) is a type of game that integrates the geographic location of players into its gameplay. These games often use GPS, augmented reality, and mobile technologies to create an interactive experience that is influenced by the player's physical surroundings. Key characteristics of location-based games include: 1. **Real-world Integration**: Players typically interact with the real world through their devices.

Rafi Bistritzer is not a widely recognized figure as of my last knowledge update in October 2023, and there may not be significant public information available about him in mainstream media or literature.

Raghu Ramakrishnan is a prominent figure in the field of computer science, particularly known for his work in data management, databases, and data science. He has held significant academic and industry positions, contributing to advancements in database technologies and big data analytics. Ramakrishnan has worked at several leading organizations and has been involved in research related to database systems, data mining, and machine learning.

Netperf is an open-source benchmarking tool used to measure network performance. It primarily assesses various aspects of network throughput and latency in TCP and UDP communications. Netperf can help network administrators and engineers evaluate the performance of network links, identify bottlenecks, and benchmark different network setups.

Edward Jełowicki is not widely known in popular culture or mainstream reference sources, so it’s possible he could be a historical figure, a professional in a specific field, or a name that might not have significant online recognition. Without additional context about who he is or what area you are referring to (such as history, science, arts, etc.), I’m unable to provide specific information.

An **effaceable functor** is a concept from category theory, specifically within the context of derived categories and triangulated categories. Although the term may not be widely known, it generally relates to functors that, under certain conditions, can be "ignored" or "factored out" in some sense without losing too much structure or information.

The term "efficiency factor" can refer to different concepts depending on the context in which it's used. Generally, it signifies a measure of how effectively a particular process, system, or machine converts inputs into useful outputs. Here are a few specific interpretations across various fields: 1. **Engineering and Physics**: In engineering contexts, the efficiency factor may refer to the ratio of useful output power to total input power in a system. It is often expressed as a percentage.