Many experiments using driving simulators or real roads have shown that using a cellular phone while driving may cause an accident because it delays visual information processing by the driver. In this research, we examined the influence on driving performance of cellular phone use on a course that simulated streets. Driving conditions were driving only, listening to the car radio, hands-free c...

Along with the explosive growth of smart phones, a new wave of the mobile device development is on the way, in which the WiFi enabled cellular phone has been taking an extremely important position. Unlike the desk top PC and notebook computers, integrating the WiFi radio within a cellular phone is much more complicated and challenging than simply putting two systems in a box with the form facto...

Several studies have demonstrated detrimental effects of cellular phone radiation on in-vitro biological systems. This article introduces a novel in-vitro method for demonstrating conformational changes in human DNA induced by a 5 minute exposure to cellular phone radiation emitted by an actual contemporary cellular phone. Dynamic changes in DNA conformation was determined in real-time by measu...

To evaluate the speech quality of actual cellular phone systems with an objective assessment, PESQ values were compared with MOS values for speech with background noises via four cellular phone systems used in Japan. As PESQ value errors were observed to be SNR-dependent, two SNR-dependent background noise compensation methods for PESQ values are proposed. Applying the compensation methods to t...

The camera cellular phone has a large portion of cellular phone market in recent year. The variety of a customer demand makes a fast model change and the spatial resolution is changed from VGA to multi-mega pixel. The 1.3 mega pixel (MP) camera cellular phone was first released into the Korean market in October 2003. The major cellular phone companies released a 2MP camera cellular phone that s...

Text telephone devices are text-based terminals that allow the users to communicate by text via fixed-line telephone networks. Since cellular phone systems are sometime subject to severe radio channel impairments and the modem signals of these text telephones are therefore not always transmitted reliably, the Federal Communications Commission (FCC) has required a solution to guarantee a reliabl...