Brain disorders can also have an effect on the display of delta waves. Parkinson's disease, schizophrenia, and narcolepsy are all characterized by changes in delta wave activity. Some drugs and chemicals have been shown to impact the brain's delta waves.
Pruning advanced ornamental trees. Now's the time... Generally speaking an ornamental tree is one that is grown for its decorative looks and not for food. Winter is the perfect time to prune deciduous ornamental trees, as their structures are dormant. Inside the tree though, important processes are underway.
The standard rule of thumb when pruning deciduous flowering shrubs is to prune those which bloom before July immediately after they've finished blooming. This gives them nearly an entire year to develop new bud-bearing branches. Prune those which bloom after July in the winter or early spring.