The biggest misconception with solar covers or rings is that they are meant to heat the pool. While these products may raise the pool temperature, they do so by reducing heat loss (mainly at night). Solar blankets should not be left on a pool during daylight hours, and at the very least, they should be removed for a 4-8 hours during the day for the pool to breathe.
ALTER DATABASE ... SET autocommit = 1 causes an implicit commit if the value was 0. All these statements cause an implicit commit before execution. This means that, even if the statement fails with an error, the transaction is committed. Some of them, like CREATE TABLE ... SELECT, also cause a commit immediatly after execution.
Doing this will be considered noncompliance. The IRB requires witness signatures for the following reasons: For short form consent documents, the witness to the oral presentation signs and dates the consent document and the summary. The person obtaining consent may not be the witness to the consent.