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Comparisons of Stress Wave Propagating Velocities in Frozen State and in Normal Temperature State of Standing Trees Propagation Velocity of Stress Wave and Ultrasonic Wave Transmitting on Indefectible Cross Section of Standing Trees Study on the Propagation Theories of Stress Wave in Log Dynamic Testing and Probability Distribution of Elastic Modulus of SPF Dimension Lumbers Construction of Stress Wave Time Isolines on Log Cross Section and Analysis of Its Effect Factors Research on Stress Wave Tomography of Spruce Logs with Artificial Defects under Different Number Sensors Effects of Moisture Content and Temperature on Propagation Velocity of Stress Waves in Korean Pine Wood Effects of Tangential Angles on Stress Wave Propagation Velocities in Log‘s Cross Sections Different Propagation Velocity of Stress Wave in Poplar and Larch Logs Analysis of Stress Wave Propagation in Hankow Willow Standing Trees and Stability Assessment Effects of Sensor Quantity and Planar Distribution on Testing Results of Log Defects Based on Stress Wave Gain and Analysis of Two-Dimensional Images of Interior Decay of Logs with Stress Wave Method