The increase of advanced service offered by cellular networks draws lots of interest from researchers to study the networks and phone user behavior. With the evolution of Voice over IP, cellular phone usage is expected to increase exponentially. In this paper, we analyze the behavior of cellular phone users and identify behavior signatures based on their calling patterns. We quantify and infer ...

The cellular phone has become a popular portable information device. In this study, the i-mode of the cellular phone was applied to the interface with the immersive virtual world. By using the cellular phone interface, the user can experience the immersive virtual world easily using his own device. The interaction using the i-mode was experimentally evaluated in the walk-through application. In...

Nowadays people benefit a lot from mobile communication systems. One of recent major breakthroughs in solving the problem of spectral congestion is the cellular concept, which means replacing a large transmitter with many little transmitters, each providing coverage to a small piece of the service area. Neighboring transmitters are assigned different groups of channels so that the interference ...

In this paper, we focus on blind source cell-phone identification problem. It is known various artifacts in the image processing pipeline, such as pixel defects or unevenness of the responses in the CCD sensor, black current noise, proprietary interpolation algorithms involved in color filter array [CFA] leave telltale footprints. These artifacts, although often imperceptible, are statistically...

mobile phone use and wireless communication technology have grown explosively over the past decades. this rapid growth has caused widespread global concern about the potential detrimental effects of this technology on human health. stem cells generate specialized cell types of the tissue in which they reside through normal differentiation pathways. considering the undeniable importance of stem ...

OBJECTIVE To assess the reliability and validity of a cellular phone dependence questionnaire (CPDQ) we designed. METHODS The CPDQ, a 20-item self-rated scale, was given to 168 healthy female university students (mean age, 21.7 years). Each question uses a 0 to 3 response scale; a higher score indicates greater dependence. The reliability and validity of the CPDQ were assessed by an internal ...

reviews in many countries indicate that drivers often talk on mobile (cell) phones. studies have been done on possible effects of concurrent mobile phone use on driving performance. previous studies have found that phone talking could impairs performance on simulated or instrumented driving tasks, using such measures as reaction time, following distance, and situational awareness. most of these...

This paper demonstrates the performance gap between speaker verification over land-line telephone networks and speaker verification over cellular networks. The paper shows that the cellular coding accounts for only a fraction of the observed performance gap. A dual-channel corpus, with speakers recorded simultaneously in a land-line phone and a cellular phone, is used to study the effect of the...

The widespread use of cellular telephones has generated concern about possible adverse health effects, particularly brain tumors. In this population-based case-control study carried out in three regions of Germany, all incident cases of glioma and meningioma among patients aged 30-69 years were ascertained during 2000-2003. Controls matched on age, gender, and region were randomly drawn from po...