Conditions commonly identified by chest radiography. 1  Pneumonia. 2  Pneumothorax. 3  Interstitial lung disease. 4  Heart failure. 5  Bone fracture. 6  Hiatal hernia.
Helicoidal flow is the cork-screw-like flow of water in a meander.It is one example of a secondary flow.he helicoidal motion of the flow aids the processes of hydraulic action and corrasion on the outside of the meander, and sweeps sediment across the floor of the meander towards the inside of the meander, forming point bar deposits.
Optic flow defined. The term âoptic flowâ refers to a visual phenomena that you experience every day. Essentially, optic flow is the apparent visual motion that you experience as you move through the world. Suppose you sitting in a car or a train, and are looking out the window.You see trees, the ground, buildings, etc., appear to move backwards.ptic flow as seen from a bird, insect, or aircraft. The figure above shows what the optic flow might look like from an aircraft flying over a rocky desert (or over Mars!). The blue arrows show the optic flow that would be seen by a camera or a passenger on the aircraft.