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Logic level. In digital circuits, a logic level is one of a finite number of states that a digital signal can inhabit. Logic levels are usually represented by the voltage difference between the signal and ground, although other standards exist. The range of voltage levels that represent each state depends on the logic family being used.
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The Market–Frankford Line (MFL), [a] currently rebranding as the L, [b] is a rapid transit line in the SEPTA Metro network in Philadelphia, Pennsylvania, United States.The MFL runs from the 69th Street Transportation Center in Upper Darby, just outside of West Philadelphia, through Center City Philadelphia to the Frankford Transportation Center in Near Northeast Philadelphia.
The hypophyseal portal system is a system of blood vessels in the microcirculation at the base of the brain, connecting the hypothalamus with the anterior pituitary. Its main function is to quickly transport and exchange hormones between the hypothalamus arcuate nucleus and anterior pituitary gland. The capillaries in the portal system are ...
Studies have shown elevated signals in the lingual gyrus when subjects were tasked with retrieval of facts while problem solving. Control samples show the activation is not linked to the problem solving itself, rather the recollection. This suggests a potential link between the lingual gyrus and hippocampal regions in the brain. [19]
IRT Sixth Avenue Line. The IRT Sixth Avenue Line, often called the Sixth Avenue Elevated or Sixth Avenue El, was the second elevated railway in Manhattan in New York City, following the Ninth Avenue Elevated. The line ran south of Central Park, mainly along Sixth Avenue. Beyond the park, trains continued north on the Ninth Avenue Line.
The term is only relevant in the case of signaling systems that use discrete signals (e.g. a combination of tones to denote one digit), as opposed to signaling systems which are message-oriented (such as SS7 and ISDN Q.931) where each message is able to convey multiple items of formation (e.g. multiple digits of the called telephone number).