the saprophyte fungi such as penicillium are common microorganisms on oak seed that have negative effects on germination. for isolation and identification species of penicillium associated with chestnut-leaved oak (quercus castaneifolia) seed and investigation the effect of moisture on its frequency, during in autumn 2007 four sampling at any region was selected in gorgan province including: sh...

In this paper, we perform the first study of noncontact internal structure sensing based on mechanical resonance mode excitation of an elastic object. The vibration is excited by airborne ultrasound acoustic radiation pressure. It is confirmed by using the noncontact sensing system that the lowest resonance frequency of the measured displacement amplitude frequency response decreases as the inc...