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A delta ray is a secondary electron with enough energy to escape a significant distance away from the primary radiation beam and produce further ionization. [1] : 25 The term is sometimes used to describe any recoil particle caused by secondary ionization. The term was coined by J. J. Thomson .
The Delta 4000 series was an American expendable launch system which was used to conduct two orbital launches in 1989 and 1990. It was a member of the Delta family of rockets. Although several variants were put forward, only the Delta 4925 was launched. The designations used a four digit numerical code to store information on the configuration ...
In general, compliance is defined by the change in volume (Δ V) versus the associated change in pressure (Δ P ), or Δ V /Δ P : During mechanical ventilation, compliance is influenced by three main physiologic factors: Lung compliance. Chest wall compliance. Airway resistance. Lung compliance is influenced by a variety of primary ...
Delta neutral. In finance, delta neutral describes a portfolio of related financial securities, in which the portfolio value remains unchanged when small changes occur in the value of the underlying security. Such a portfolio typically contains options and their corresponding underlying securities such that positive and negative delta ...
Delta Corp Limited, formerly Arrow Webtex Ltd, is an Indian Public company specializing in gaming and hospitality. The firm's primary assets encompass offshore Casino and hospitality services, operating under the Deltin Casinos & Hotels brand. The company engages in various forms of casino gaming, including live, electronic, and online ...
Delta set. In mathematics, a Δ-set, often called a Δ-complex or a semi-simplicial set, is a combinatorial object that is useful in the construction and triangulation of topological spaces, and also in the computation of related algebraic invariants of such spaces. A Δ-set is somewhat more general than a simplicial complex, yet not quite as ...
The Optare Delta was a single-decker bus body manufactured by Optare on the DAF SB220 chassis. They were built in a factory in Leeds, England. They are known for their distinctive sloping front window. A common feature about the bus that it has a distinctive one-piece windscreen with a sloped windowline and a separately mounted destination display.
Kronecker delta. In mathematics, the Kronecker delta (named after Leopold Kronecker) is a function of two variables, usually just non-negative integers. The function is 1 if the variables are equal, and 0 otherwise: or with use of Iverson brackets : For example, because , whereas because . The Kronecker delta appears naturally in many areas of ...