An overview of recent experimental results on instability and dynamics of jets at low Reynolds numbers is given. Round and plane, macro and micro jets are under the consideration. Basic features of their evolution affected by initial conditions at the nuzzle outlet and environmental perturbations are demonstrated.

Deterioration of concrete, which is mainly due to ignorance of environmental and service conditions, causes considerable costs for the construction industry. With this in mind, in this paper, results of investigation into the major causes of concrete deterioration in the Urumie Lake are presented. For the purposes of this investigation, samples were obtained by mixing two types of cement (OPC t...

A machine-vision method applicable to precision farming for environmental friendly agriculture is proposed which distinguish which of clover and gramineous weeds is dominant, within a section of 30cm square. Pictures of vegetated ground are treated as random textures and micro-shape based feature extraction method is applied. As many as 98are correctly classified.