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Doctor Of Medicine
A Doctor of Medicine (abbreviated MD, from the Latin language, Latin ) is a medical degree, the meaning of which varies between different jurisdictions. In the United States, and some other countries, the ''MD'' denotes a professional degree of physician. This generally arose because many in 18th-century medical professions trained in Scotland, which used the MD degree nomenclature. In England, however, Bachelor of Medicine, Bachelor of Surgery (MBBS) was used: in the 19th century, it became the standard in Scotland too. Thus, in the United Kingdom, Republic of Ireland, Ireland and other countries, the MD is a research doctorate, honorary degree, honorary doctorate or applied clinical degree restricted to those who already hold a professional degree (Bachelor's/Master's/Doctoral) in medicine. In those countries, the equivalent professional degree to the North American, and some others' usage of MD is still typically titled Bachelor of Medicine, Bachelor of Surgery. History The fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McDonnell Douglas
McDonnell Douglas Corporation was a major American Aerospace manufacturer, aerospace manufacturing corporation and defense contractor, formed by the merger of McDonnell Aircraft and the Douglas Aircraft Company in 1967. Between then and its own merger with Boeing in 1997, it produced well-known commercial and military aircraft, such as the McDonnell Douglas DC-10, DC-10 and the McDonnell Douglas MD-80, MD-80 airliners, the McDonnell Douglas F-15 Eagle, F-15 Eagle air superiority fighter, and the McDonnell Douglas F/A-18 Hornet, F/A-18 Hornet multirole combat aircraft, multirole fighter. The corporation's headquarters were at St. Louis Lambert International Airport, near St. Louis, Missouri. History Background The company was formed from the firms of James Smith McDonnell and Donald Wills Douglas, Sr., Donald Wills Douglas in 1967. Both men were of Scottish ancestry, were graduates of the Massachusetts Institute of Technology, and had worked for the aircraft manufacturer Glenn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MiniDisc
MiniDisc (MD) is an erasable magneto-optical disc-based data storage format offering a capacity of 60, 74, or 80 minutes of digitized audio. Sony announced the MiniDisc in September 1992 and released it in November of that year for sale in Japan and in December in Europe, North America, and other countries. The music format was based on ATRAC audio data compression, Sony's own proprietary compression code. Its successor, Hi-MD, would later introduce the option of linear PCM digital recording to meet audio quality comparable to that of a compact disc. MiniDiscs were very popular in Japan and found moderate success in Europe. Although it was designed to succeed the cassette tape, it did not manage to supplant it globally. By March 2011, Sony had sold 22 million MD players, but discontinued further development. Sony ceased manufacturing and sold the last of the players by March 2013. On January 23, 2025, Sony announced they would end the production of recordable MD media ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Dynamics
Molecular dynamics (MD) is a computer simulation method for analyzing the Motion (physics), physical movements of atoms and molecules. The atoms and molecules are allowed to interact for a fixed period of time, giving a view of the dynamics (mechanics), dynamic "evolution" of the system. In the most common version, the trajectory, trajectories of atoms and molecules are determined by Numerical integration, numerically solving Newton's laws of motion, Newton's equations of motion for a system of interacting particles, where Force (physics), forces between the particles and their potential energy, potential energies are often calculated using interatomic potentials or molecular mechanics, molecular mechanical Force field (chemistry), force fields. The method is applied mostly in chemical physics, materials science, and biophysics. Because molecular systems typically consist of a vast number of particles, it is impossible to determine the properties of such complex systems analyt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maryland
Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, and Delaware to its east, as well as with the Atlantic Ocean to its east, and the national capital and federal district of Washington, D.C. to the southwest. With a total area of , Maryland is the List of U.S. states and territories by area, ninth-smallest state by land area, and its population of 6,177,224 ranks it the List of U.S. states and territories by population, 18th-most populous state and the List of states and territories of the United States by population density, fifth-most densely populated. Maryland's capital city is Annapolis, Maryland, Annapolis, and the state's most populous city is Baltimore. Maryland's coastline was first explored by Europeans in the 16th century. Prior to that, it was inhabited by several Native Americans in the United States ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MD Helicopters
MD Helicopters, LLC. (formerly McDonnell Douglas Helicopter Systems) is an American aerospace manufacturer. It produces light utility helicopters for commercial and military use. The company was a subsidiary of Hughes Aircraft until 1984, when McDonnell Douglas acquired it and renamed it McDonnell Douglas Helicopter Systems. It later became MD Helicopters in 1999 after McDonnell Douglas merged with Boeing. History The company began in 1947 as a unit of Hughes Aircraft, then was part of the Hughes Tool Company after 1955. It became the helicopter division of Hughes' Summa Corporation in 1972, and was finally reformed as Hughes Helicopters, Inc. in 1981. However, throughout its history, the company was informally known as Hughes Helicopters. The company was sold to McDonnell Douglas in 1984. Hughes Helicopters produced three major designs during its 37-year history. The Model 269/300 was Hughes' first successful helicopter design. Built in 1956, and entering production in 1957 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mean Absolute Difference
The mean absolute difference (univariate) is a Statistical dispersion#Measures of statistical dispersion, measure of statistical dispersion equal to the average absolute difference of two independent values drawn from a probability distribution. A related statistic is the #Relative_mean_absolute_difference, relative mean absolute difference, which is the mean absolute difference divided by the arithmetic mean, and equal to twice the Gini coefficient. The mean absolute difference is also known as the absolute mean difference (not to be confused with the absolute value of the mean signed difference) and the Corrado Gini, Gini mean difference (GMD). The mean absolute difference is sometimes denoted by Δ or as MD. Definition The mean absolute difference is defined as the "average" or "mean", formally the expected value, of the absolute difference of two random variables ''X'' and ''Y'' Independent and identically distributed random variables, independently and identically distribut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MDTV (Indonesian TV Network)
PT MDTV Media Televisi (MDTV, formerly known as NET. and Spacetoon Indonesia) is an Indonesian national private television broadcaster owned by MDTV Media Technologies and Industri Mitra Media under the auspices of MD Entertainment. This television network conducted a trial broadcast as NET. on 18 May 2013 and was officially launched on 26 May 2013 at 19:00 WIB by replacing the terrestrial feed of Spacetoon Indonesia. History In 2012, PT Net Mediatama Indonesia was established. In March 2013, the company acquired PT Televisi Anak Spacetoon (Spacetoon) by purchasing 95% of its shares before the company was wholly acquired in May 2013. On 18 May 2013, NET started its trial broadcast using Spacetoon's frequencies on terrestrial television, limiting the latter broadcast to pay television. Programming previously aired by Spacetoon was broadcast on a programming block called "NET Playground" or "NET Toon" that aired on weekday afternoons until the block ceased to air a year later, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ménière's Disease
Ménière's disease (MD) is a disease of the inner ear that is characterized by potentially severe and incapacitating episodes of vertigo, tinnitus, hearing loss, and a feeling of fullness in the ear. Typically, only one ear is affected initially, but over time, both ears may become involved. Episodes generally last from 20 minutes to a few hours. The time between episodes varies. The hearing loss and ringing in the ears can become constant over time. The cause of Ménière's disease is unclear, but likely involves both genetic and environmental factors. A number of theories exist for why it occurs, including constrictions in blood vessels, viral infections, and autoimmune reactions. About 10% of cases run in families. Symptoms are believed to occur as the result of increased fluid buildup in the labyrinth of the inner ear. Diagnosis is based on the symptoms and a hearing test. Other conditions that may produce similar symptoms include vestibular migraine and transien ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muscular Dystrophy
Muscular dystrophies (MD) are a genetically and clinically heterogeneous group of rare neuromuscular diseases that cause progressive weakness and breakdown of skeletal muscles over time. The disorders differ as to which muscles are primarily affected, the degree of weakness, how fast they worsen, and when symptoms begin. Some types are also associated with problems in other human organs, organs. Over 30 different disorders are classified as muscular dystrophies. Of those, Duchenne muscular dystrophy (DMD) accounts for approximately 50% of cases and affects males beginning around the age of four. Other relatively common muscular dystrophies include Becker muscular dystrophy, facioscapulohumeral muscular dystrophy, and myotonic dystrophy, whereas limb–girdle muscular dystrophy and congenital muscular dystrophy are themselves groups of several – usually extremely rare – genetic disorders. Muscular dystrophies are caused by mutations in genes, usually those involved in making ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moldova
Moldova, officially the Republic of Moldova, is a Landlocked country, landlocked country in Eastern Europe, with an area of and population of 2.42 million. Moldova is bordered by Romania to the west and Ukraine to the north, east, and south. The List of states with limited recognition, unrecognised breakaway state of Transnistria lies across the Dniester river on the country's eastern border with Ukraine. Moldova is a Unitary state, unitary Parliamentary system, parliamentary Representative democracy, representative democratic republic with its capital in Chișinău, the country's largest city and main cultural and commercial centre. Most of Moldovan territory was a part of the Principality of Moldavia from the 14th century until 1812, when it was Treaty of Bucharest (1812), ceded to the Russian Empire by the Ottoman Empire (to which Moldavia was a Vassal and tributary states of the Ottoman Empire, vassal state) and became known as Bessarabia. In 1856, southern Bessarabia was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methyldichloroarsine
Methyldichloroarsine, sometimes abbreviated "MD" and also known as methyl Dick, is an organoarsenic compound with the formula CH3AsCl2. This colourless volatile liquid is a highly toxic vesicant that has been used in chemical warfare. History German chemists weaponized methyldichloroarsine during World War I, between 1917 and 1918. It was the first organoarsenic compound to be weaponized. Structure, synthesis, reactivity Focusing on the arsenic center, the molecule geometry is trigonal pyramidal with the Cl-As-Cl and C-As-Cl angles approaching 90° (see image). Virtually all related arsenic(III) compounds adopt similar structures. Methyldichloroarsine is produced by the reaction of methylmagnesium chloride and arsenic trichloride: :AsCl3 + CH3MgCl → CH3AsCl2 + MgCl2 Typically such syntheses are conducted in ether or THF solutions and typically the product is isolated by distillation. Use of larger amounts of the magnesium reagent affords greater amounts of dimeth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
