Randomized Controlled Studies: This is a study in which 1) There are two groups, one treatment group and one control group. The treatment group receives the treatment under investigation, and the control group receives either no treatment (placebo) or standard treatment. 2) Patients are randomly assigned to all groups.
winds that blow in a steady direction can move a dune. such wind will consistently pick up sand from one side and deposit it to a other side. this causes the entire dune to s â¦ lowly move in the direction if the wind.
Dunes develop in a different way to other depositional features because they are the result of the interaction between marine processes and the atmosphere. In brief, dunes begin to form beyond the strandline of the beach where dry sediment is transported by wind through saltation and suspension.oasts of erosion form as a result of high energy waves, large fetch, high exposure and limited deposition. They are also associated with drift alligned coasts that are influenced by longshore drift.