"Pavelka, Jan" . . "2002-06-17+02:00"^^ . "Barcelona" . "2"^^ . . "84-699-8573-6" . "Majzner, Ji\u0159\u00ED" . . . "Crack`s Wall Vibration Kinetics Determined by Electromagnetic Emission" . . . "crack, noise spectroscopy, spectral density"@en . "26220" . . "RIV/00216305:26220/02:PU31494" . . "Crack`s Wall Vibration Kinetics Determined by Electromagnetic Emission"@en . . "Z(MSM 262200022)" . "RIV/00216305:26220/02:PU31494!RIV/2003/MSM/262203/N" . . "1"^^ . "8th ECNDT Barcelona - Abstracts Book" . "[210923C88A80]" . "Cracks creation was studied by simultaneous measurement of electromagnetic (EME) and acoustic (AE) emission signals. This method can improve localisation of the crack position, cracks plane orientation and its dimension. On the faces of new created crack electric charges constitute electric dipole system and due to crack walls vibration an EME signal is detected with frequency 1-10MHz corresponding to crack length 0.1 to 1 mm. The second source of EME signal is later activated due to whole sample mechannical vibrations with a frequency given by sample boundary conditions in the range 50-500kHz."@en . . "Crack`s Wall Vibration Kinetics Determined by Electromagnetic Emission"@en . "Cracks creation was studied by simultaneous measurement of electromagnetic (EME) and acoustic (AE) emission signals. This method can improve localisation of the crack position, cracks plane orientation and its dimension. On the faces of new created crack electric charges constitute electric dipole system and due to crack walls vibration an EME signal is detected with frequency 1-10MHz corresponding to crack length 0.1 to 1 mm. The second source of EME signal is later activated due to whole sample mechannical vibrations with a frequency given by sample boundary conditions in the range 50-500kHz." . . . "Crack`s Wall Vibration Kinetics Determined by Electromagnetic Emission" . "LEGANES MADRID" . . "Spanich Society for NDT AEND" . . "641877" . . . "0"^^ . "0"^^ . "234-234" . "2"^^ .