In one aspect, a data race condition is detected based on an address of a variable shared by at least first and second threads for executing the program code, the shared variable address being stored in a hardware table. The power cord securing device includes a rotatable plate having a first part for being wound by the power cord, and a resilience element having a first terminal and a second terminal respectively connected to a second part and a third part of the rotatable plate. Then, in response to the detection of the at least one predefined network transaction, at least one predefined location service is triggered. At least a portion of each of the conveyors is located in the upper chamber to catch materials fed into the flocculent. The ultrasonic diagnostic apparatus plots a cross-sectional vascular image with a reduced ultrasonic echo reflected from blood cells, the image clearly displaying the boundary between the blood vessel wall and the blood vessel lumen.