Closed truss: 1) A truss with a tie beam; 2) a roof system with a ceiling so the framing is not visible. Open truss: 1) A truss with an interrupted tie beam or scissor truss which allow a vaulted ceiling area; 2) Roof framing open to view, not hidden by a ceiling. King post truss
Memory disruptions by alcohol leading to blackout have been linked to inhibition of long-term potentiation, particularly in the hippocampus, by affecting gamma-Aminobutyric acid (GABA) and N-methyl-D-aspartate neurotransmission (see Effects of alcohol on memory).
A transient episode that occurs during a state of intense intoxication (alcoholic blackout) of which the person has no recall, despite apparently having been conscious at the time. /blackÂ·out/ (-out) loss of vision and momentary lapse of consciousness due to diminished circulation to the brain and retina.