A fast scheme for wavelet-domain interpolation of lost image blocks in wireless image transmission is presented in this paper. The algorithm is designed to be compatible with the wavelet-based JPEG2000 image compression standard. In the transmission of block-coded images, fading in wireless channels and congestion in packet-switched networks can cause entire blocks to be lost. Instead of using ...

For the first time, a complete wireless and mobile emergency TeleOrthoPaedics system with field trials and expert opinion is presented. The system enables doctors in a remote area to obtain a second opinion from doctors in the hospital using secured wireless telecommunication networks. Doctors can exchange securely medical images and video as well as other important data, and thus perform remot...

A large fraction of Internet traffic is now driven by requests from mobile devices with relatively small screens and often stringent bandwidth requirements. Due to these factors, it has become the norm for modern graphics-heavy websites to transmit low-resolution, low-bytecount image previews (thumbnails) as part of the initial page load process to improve apparent page responsiveness. Increasi...

The main purpose of this paper is to study the High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA) performance at 900/2000 MHz bands, considering a multiple users and services scenario. The intention is to evaluate the traffic management between the two carriers, the coverage and capacity aspects. A simulator was developed to study the multiple users’ scenario,...

the third civilization wave is characterized by the development of information society. in future, a high information availability and knowledge are conceived as prominent accelerators of economy. under the third wave, the community of computer experts understands the network age. the attribute ‘network’ expresses current trends, i.e. e-business, virtual organizations, virtual teams, etc. bette...

Data transport in the Internet is managed by a large number of network operators, who independently own and operate physically and logically separated networks (autonomous systems, Crémer et al. 2000). Interconnection of these networks is a prerequisite for the large scope and accessibility of the Internet. Since network operators have commercial interests, interconnection is subject to market ...

Protected areas (PAs) are the cornerstones of global biodiversity conservation efforts, but to fulfil this role they must be effective at conserving both habitat and species. Among protected taxa, freshwater fish exposed multiple disturbances considered one most endangered. The Natura 2000 reserves network was established with aim preserving across Europe, few assessments have been made on its ...

The Natura 2000 network is regarded as one of the conservation success stories in the global effort to protect biodiversity. However, significant challenges remain in Natura 2000 implementation, owing to its rapid expansion, and lack of a coherent vision for its future. Scientific research is critical for identifying conservation priorities, setting management goals, and reconciling biodiversit...