Future mobile communication systems beyond 3 generation (3G) are expected to signal the transition from inflexible, vertical infrastructures to reconfigurable, horizontally integrated networks that will incorporate a vast, ubiquitous space of devices and radio technologies and will be able to deliver to end-users a previously unimaginable range of valuable services. A fundamental characteristic...

Call Admission Control (CAC) plays a basic role in 3 Generation networks (3G), properly accommodating new connection requests while ensuring seamless service provision to the existing connections. CAC is classically based on Signal to Interference Ratio estimates and threshold comparisons in 3G networks adopting CDMA access technique. A novel CAC strategy founded on Fuzzy Logic is proposed in t...

Coverage and capacity are important issues in the planning process for cellular Third Generation (3G) mobile networks. The planning process aims to allow the maximum number of users sending and receiving adequate signal strength in a cell. In this paper we present calculations for capacity, coverage for 3G networks.

This paper introduces the prototype of design and implementation of a videoconferencing (VC) system and protocol for 3G networks based on our 3G-324M protocol stack. Efficient multimedia processing and intelligent MCUs (multipoint control unit) for efficient token transfer among a group of terminals are presented. The prototype system has shown its performance for VC in WLAN environment.

We investigate a hybrid wireless access network design that integrate 3G and WiFi networks, specifically targeting vehicular mobility. The goal is to shift the load from the expensive 3G network to the less expensive WiFi network without hurting the user experience. As a test platform we choose a nationwide 3G network and a commercially operated metroscale WiFi network. We show that over a wide...

Heliothis virescens ascovirus 3a (HvAV-3a), a member of the family Ascoviridae, has the highest diversity among ascovirus species that have been reported in Australia, Indonesia, China, and the United States. To understand the diversity and origin of this important ascovirus, the complete genome of the HvAV Indonesia strain (HvAV-3g), isolated from Spodoptera exigua, was determined to be 199,72...

[Purpose and Scope of Research] The purpose of this research is to understand the present situation and to survey the future of third and fourth generation (3G and 4G, respectively) mobile communications systems. Four diffusion sample scenarios are generated from the point of view on how far 3G or non-3G wireless services will be accepted by the market by the year 2010, when 4G services are exp...

Introduction: There have been many studies conducted on the effects of mobile phones radiations on people’s health due to increasing number of mobile phones users. The present study aimed to investigate the effects of electromagnetic waves generated from 3G and 4G mobile phone radiations on student’s reaction time and short-term memory. <stro...

APOBEC3A and APOBEC3G cytidine deaminases inhibit viruses and endogenous retrotransposons. We recently demonstrated the novel cellular C-to-U RNA editing function of APOBEC3A and APOBEC3G. Both enzymes deaminate single-stranded DNAs at multiple TC or CC nucleotide sequences, but edit only a select set of RNAs, often at a single TC or CC nucleotide sequence. To examine the specific site preferen...