Vibratory energy channelling between a linear and nonlinear oscillator is studied at different time scales. The system possesses time-dependent periodic restoring forcing function. Detection of fast slow dynamics leads to revealing dynamical characteristics, namely invariant manifold, equilibrium singular points. We show that the nonlinearity produces phase-dependent frequency responses, modifi...

Knowledge of hydrologic connectivity is important to grasp the hydrological response at a basin scale, particularly as changes in can have negative effect on environment. In context changing climate, being able predict how will affect runoff and sediment transport relevant for land-use planning. Many studies hydrology, geomorphology climatology been conducted Lake Tana Basin Ethiopia, which und...

Introduction: Osteomas are asymptomatic and rare slow growing bony tumors in temporal bone, and should be taken into account in differential diagnosis of the osteolytic solitary skull lesions. Sometimes is associated with pain and functional loss. Only a few cases have been reported.   Case Report: We describe a case of an osteoid osteoma of the temporal bone (mastoid) in a 31-year-old woman pr...