Text this: Topical themes and thematic progression: the “picture” of research articles

 _    _      ___      ______    _____     _____   
| \  / ||   / _ \\   /_   _//  |  ___||  / ____|| 
|  \/  ||  / //\ \\  `-| |,-   | ||__   / //---`' 
| .  . || |  ___  ||   | ||    | ||__   \ \\___   
|_|\/|_|| |_||  |_||   |_||    |_____||  \_____|| 
`-`  `-`  `-`   `-`    `-`'    `-----`    `----`