Mobile robots that consist of a mobile platform with one or many manipulators mounted on it are of great interest in a number of applications. Combination of platform and manipulator causes robot operates in extended work space. The analysis of these systems includes kinematics redundancy that makes more complicated problem. However, it gives more feasibility to robotic systems because of the e...

The possible risks of radio-frequency electromagnetic fields for the human body is a growing concern for our society. We have previously shown that weak pulsed microwaves give rise to a significant leakage of albumin through the blood-brain barrier. In this study we investigated whether a pathologic leakage across the blood-brain barrier might be combined with damage to the neurons. Three group...

The capacity of the global communications network is being progressively increased to handle the rapid growth in telecommunication traffic generated by the Internet. Fujitsu supplies submarine optical cable systems that can provide the huge capacity and short transmission delay required by carriers. There are two ways to increase capacity: construct a new submarine cable system or upgrade the e...

Base stations represent the main contributor to the energy consumption of a mobile cellular network. Since traffic load in mobile networks significantly varies during a working or weekend day, it is important to quantify the influence of these variations on the base station power consumption. Therefore, this paper investigates changes in the instantaneous power consumption of GSM (Global System...

fibre − over − an enabling role for radio Broadband wireless systems and networks: Email alerting service here the article or click of article-sign up in the box at the top right-hand corner Receive free email alerts when new articles cite this There has been a remarkable take up of wireless and mobile communications in recent years, such that in a number of countries the number of mobile phone...

The General Packet Radio Service (GPRS) of the Global System for Mobile Communications (GSM) is designed for packet switched data transmission and is a mean of mobile access to packet data networks, e.g. the Internet. Packet switched transmission is inherently better suited for bursty traffic as it is generated by typical Internet applications primarily WWW, FTP and e-mail. A simulator is prese...

Nowadays, MVNOs are entering the market with the aim of providing new services in the mobile telecommunications industry. Current studies show that having an active and sizable mobile communications market, owning the necessary technological infrastructure, and developing the imperative regulations are critically important factors for MVNO market development. In this respect, this study aims to...

The evolution of European mobile communication systems towards the third generation (3G) is based on GSM (Global System for Mobile communications) [1]. A first step in the evolution is the General Packet Radio Service (GPRS) [2], [3], which truly supports packet switched data services. Our goal is to investigate the efficiency of different algorithms used for resource allocation in data transfe...

By creating a single market and introducing competition and the de facto global standard, GSM, the European Union (EU) achieved economies of scale and has been the world's leader in the mobile communications sector. A number of interrelated issues surrounding the third-generation (3G) system have recently become visible, however. The first indication is the high 3G spectrum license prices mobil...

This paper presents a review of four types of signal of opportunity (analogue/digital television TV, analogue/digital audio, Global System for Mobile Communications GSM, and Wi-Fi signals) and the implications of using these signals for navigation in terms of: i) problems that affect positioning, ii) exploiting them in dissimilar geographical regions of the world, and iii) positioning technique...