An engine cooling system comprises a coolant inlet formed at one side of a cylinder block for allowing a coolant to separately flow into the cylinder block and a cylinder head, and a coolant outlet formed at the other side of the cylinder head for allowing the coolant having flowed into the cylinder block and the cylinder head to separately flow out of the cylinder block and the cylinder head. The safety joint includes a first riser coupling at its upper end for connection to a corresponding riser coupling of a riser joint and a second riser coupling at its lower end for connection to a corresponding riser coupling of a riser joint or stress joint. For instance, the fragment can include a script enabled to detect human activity within the requested page such as a mouse movement. According to other techniques, one or more preamble symbols may be interspersed within a header portion of a PLC frame to facilitate estimation of a frame boundary andor sampling frequency offset, for example, in the presence of impulsive noise. A prize for each respective playergame play request is awarded based on the pattern result level identified for the respective playergame play request. Information on the cell voltages is transmitted to the controller.