1 Loss System For a background review, I started the summer vacation scholorship by looking at loss systems. In a telecommunication context, this means that a new coming call is blocked (or lost) if there is no free circuits for that call. First of all, I made myself familiar with the notations. In a loss system, let C be the total number of circuits available, n be the number of circuits in us...

This paper describes an investigation into the development of a new generation of threephase rectifier, used to power telecommunications equipment. Traditionally, the topology used is a single-phase two-stage design, with a boost converter at the input to the first stage and an isolated dcdc converter making up the second stage. The boost converter provides power factor correction which is nece...

For seven European countries macro-level indicators of the accumulation of intangible capital are developed. Using hedonic prices deflate investments in IT hardware, IT software and telecommunication equipment, for both intangibles and ‘smart’ tangibles capital stocks are constructed. These capital stock data are then used as an input to analyse the productivity effects for the business sector ...

The Virtual Immersive Learning (VIL) test-bed implements a virtual collaborative immersive environment, capable of integrating natural contexts and typical gestures, which may occur during traditional lectures, enhanced with advanced experimental sessions. The main aim of the paper is to describe the test-bed motivations, as well as the most significant choices, both hardware and software, adop...

Telecommunication systems, with the support of digital technology had proven their efficiency in the world market. Digital processors had given rise to a new invention called Software Defined Radio which allows dynamic programming of the radio equipment i. e. A flexible architecture whose behavior is dependent on the software behind it and not only on its hardware. It reflects the convergence o...

An important performance aspect of widespread networks is the quality of perceived conversational speech of voice calls and data services. Today these networks belong to 2-2.5 generation. Third generation (3G) networks were created only in the last decade. Currently 3G technologies are standardized. Equipment manufactures and network operators are in the process of deployment of 3G networks. Sc...

Work domain analyses can be time consuming, requiring extensive interviews, documentation review, and observations, among other techniques. Given the time and resources required, we examine how to generalize a work domain analysis technique, namely the hybrid Cognitive Task Analysis (hCTA) method across two domains in order to generate a common set of display information requirements. The two d...

The Call Quality measurement from end users equipment and from end users perspective is novel area of research in telecommunication networks. This paper presents the summary of call quality measurement technique proposed in [16] and latest correlation results for the same. Call quality measurement technique basically based on measuring certain call quality parameters during the active call and ...

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...