Transfer of debris flow caused by floods in the river downstream of the mountains leads to several damages every year. Numerous researches have been carried out on the Mountain Rivers the results of which show the importance of performing more researches to control debris flows in the floodplain because of various effective hydraulic-geometric parameters.For this purpose, AbNik Mountain River l...

introduction lentil (lens culinaris medic) is an important and highly nutritious crop belonging to the family of legumes. lentil is cultivated worldwide but competition with weeds is a problem affecting production and can reduce yield by more than 80%. the study on the separation of impurities in bulk lentils (euphorbia helioscopia weed, wild oat weed and etc.) by a gravity separator has an ext...

Sound synthesis algorithms modeling the linear behavior of strings are well developed. However, some musical instruments require the modeling of such nonlinear phenomena as the appearance of longitudinal string modes, phantom partials, or mode coupling and pitch glide due to tension variation. Accordingly, the effects of geometric nonlinearities in strings are gaining more and more interest in ...

When a cantilever beam rotates about an axis perpendicular to its neutral axis, its modal characteristics often vary significantly. If the geometric shape and the material property of the beam are given, the modal characteristic variations can be accurately estimated following a well-established analysis procedure employing assumed mode method or finite element method. In many practical design ...