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).
The blood alcohol content for blackouts begins at 0.14. Binge drinking is generally defined as taking in five or more alcoholic drinks in two hours for men and four or more drinks for women. Blackouts can occur at any age and even with a small amount of alcohol.