A cement admixture and a cement composition having a carbonation suppressing effect and a heat-of-hydration suppressing effect are provided. Upon receipt of an Internet access request from a user, the mobile communication terminal accesses a web server through an Internet, downloads a web document from the web server, and displays the downloaded web document. In another embodiment of the present invention, the cam closing ramp for a main exhaust event may be extended to terminate near the beginning of a brake gas recirculation event to facilitate refilling a hydraulic valve actuation system used to in association with the exhaust valve.