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Beta: Beta is the second letter of the Greek alphabet. In the system of Greek numerals it has a value of 2.
Beta blocker: Beta blockers are a class of medications that are predominantly used to manage abnormal heart rhythms, and to protect the heart from a second heart attack (myocardial infarction) after a first heart attack (secondary prevention). They are also widely used to treat high blood pressure (hypertension), although they are no longer the first choice for initial treatment of most patients.Beta blockers are competitive antagonists that block the receptor sites for the endogenous catecholamines epinephrine (adrenaline) and norepinephrine (noradrenaline) on adrenergic beta receptors, of the sympathetic nervous system, which mediates the fight-or-flight response.
Beta Israel: Beta Israel , also known as Ethiopian Jews (Hebrew: יְהוּדֵי אֶתְיוֹפְּיָה: Yehudey Etyopyah; Ge'ez: የኢትዮጵያ አይሁድዊ, ye-Ityoppya Ayhudi), are a Jewish community that developed and lived for centuries in the area of the Kingdom of Aksum and the Ethiopian Empire, which is currently divided between the modern-day Amhara and Tigray regions of Ethiopia. Most of the community emigrated to Israel in the late 20th century.The Beta Israel lived in northern and northwestern Ethiopia, in more than 500 small villages spread over a wide territory, alongside populations that were Muslim and predominantly Christian.
Beta decay: In nuclear physics, beta decay is a type of radioactive decay in which a beta particle (fast energetic electron or positron) is emitted from an atomic nucleus, transforming the original nuclide to an isobar. For example, beta decay of a neutron transforms it into a proton by the emission of an electron accompanied by an antineutrino; or, conversely a proton is converted into a neutron by the emission of a positron with a neutrino in so-called positron emission.
Beta distribution: In probability theory and statistics, the beta distribution is a family of continuous probability distributions defined on the interval [0, 1] parameterized by two positive shape parameters, denoted by α and β, that appear as exponents of the random variable and control the shape of the distribution. The generalization to multiple variables is called a Dirichlet distribution.