The students’ attempted prank resulted in the rock becoming immobile, infuriating residents and leading to legal action. When it moved, the boulder made a rumbling noise. It always returned to its original position, much like a tumble doll, without falling off the cliff. Newspapers and TV show...
All the above methods are used to detect falling rocks; however, they are not sufficiently effective to warn cars of rock-fall hazards before their occurrence. These methods respond after the rock-fall occurrence has caused harm on the roads. In addition, they have weak capabilities in dealing...