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barrier function

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  • Barrier function — In constrained optimization, a field of mathematics, a barrier function is a continuous function whose value on a point increases to infinity as the point approaches the boundary of the feasible region (Nocedal and Wright 1999). It is used as a… …   Wikipedia

  • Barrier to autointegration factor 1 — Barrier to autointegration factor 1, also known as BANF1, is a human gene.cite web | title = Entrez Gene: BANF1 barrier to autointegration factor 1| url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene Cmd=ShowDetailView TermToSearch=8815|… …   Wikipedia

  • Blood-brain barrier — The blood brain barrier (BBB) is a metabolic or cellular structure in the central nervous system (CNS) that restricts the passage of various chemical substances and microscopic objects (e.g. bacteria) between the bloodstream and the neural tissue …   Wikipedia

  • Self-concordant function — In optimization, a self concordant function is a function f:mathbb{R} ightarrow mathbb{R} for which: |f (x)| leq 2 f (x)^{3/2}.A function g(x) : mathbb{R}^n ightarrow mathbb{R} is self concordant if its restriction to any arbitrary line is self… …   Wikipedia

  • gut barrier — impermeability of the intestinal mucosa to intraluminal bacteria and endotoxins; failure of barrier function can result in sepsis and multiple organ failure …   Medical dictionary

  • Finite potential barrier (QM) — In quantum mechanics, the finite potential barrier is a standard one dimensional problem that demonstrates the phenomenon of quantum tunnelling. The problem consists of solving the time independent Schrödinger equation for a particle with a… …   Wikipedia

  • Cable barrier — Cable barrier, sometimes referred to as guard cable, is a type of roadside or median barrier. It consists of steel wire ropes mounted on weak posts. As is the case with any roadside barrier, its primary purpose is to prevent a vehicle from… …   Wikipedia

  • Traffic barrier — Traffic barriers keep vehicles within their roadway and prevent vehicles from colliding with dangerous obstacles. Traffic barriers installed at the road side also prevent errant vehicles from traversing steep (non recoverable) slopes. Traffic… …   Wikipedia

  • Radiant barrier — Radiant barriers or reflective barriers work by reducing heat transfer by thermal radiation. All materials give off, or emit, energy by thermal radiation as a result of their temperature. The amount of energy emitted depends on the surface… …   Wikipedia

  • Coulomb barrier — The Coulomb barrier, named after Coulomb s law, which is named after physicist Charles Augustin de Coulomb (1736–1806), is the energy barrier due to electrostatic interaction that two nuclei need to overcome so they can get close enough to… …   Wikipedia

  • Schottky barrier — A Schottky barrier is a potential barrier formed at a metal semiconductor junction which has rectifying characteristics, suitable for use as a diode. The largest differences between a Schottky barrier and a p n junction are its typically lower… …   Wikipedia