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The Super Dual Auroral Radar Network (Super-DARN), which consists of networks of HF radars surrounding the northern and southern poles, has proven to be an extremely successful experimental technique in a wide range of scientific areas. The basic design of the radars, which contributes to SuperDARN, has remained virtually unchanged since the first radar was(More)
The increasing success of Video on Demand and IPTV services poses several challenges to both network operators and service providers. Due to their heavy bandwidth requirement and the high concentration of requests during peak times, implementing these services efficiently without compromising the Quality of Experience of customers is not a trivial task.(More)
Fibre-to-the-premises (FTTP) has been long sought as the ultimate solution to satisfy the demand for broadband access in the foreseeable future, and offer distance-independent data rate within access network reach. However, currently deployed FTTP networks have in most cases only replaced the transmission medium, without improving the overall architecture,(More)
10-Gigabit-capable Passive Optical Network (XG-PON), one of the latest standards of optical access networks, is regarded as one of the key technologies for future Internet access networks. In this paper, we propose and discuss the design and implementation of an XG-PON module for the NS-3 network simulator. The aim is to provide a standards-compliant,(More)
The Yersinia pestis pH 6 antigen was expressed by, and purified from, Escherichia coli containing cloned psa genes. By an enzyme-linked immunosorbence-based assay, purified pH 6 antigen bound to gangliotetraosylceramide (GM1A), gangliotriaosylceramide (GM2A), and lactosylceramide (LC) (designations follow the nomenclature of L. Svennerholm [J. Neurochem.(More)
Long-reach passive optical networks (LR-PONs) prove to be a suitable candidate for future broadband access networks. The longer reach of the feeder fiber in a LR-PON enables us to consolidate a large number of end users. The longer reach also eliminates a degree of electronic processing by eliminating the metro network and connecting the local exchanges (or(More)
Content Distribution currently accounts for the vast majority of Internet traffic. Peer-to-Peer represents a scalable and inexpensive strategy to deliver content to end-customers; unfortunately, it poses a sever strain on the network core and generates high costs for service providers. Locality-aware policies have been proposed to tackle these issues, but(More)
Backhauling base stations with Passive Optical Networks (PONs) besides bringing a new revenue source for the PON operator, can reduce the cost of installing new base stations for the mobile operator since a new, dedicated, backhaul can be avoided. If mobile operators have more than one base station on the PON, they might be interested in assuring bandwidth(More)
Mass deployment of fibre access networks is without doubt the next short to medium term goal of many network operators around the globe. Long-Reach Passive Optical Network (LR-PON) has been proposed as a solution to help spreading mass deployment of Fibre-to-the-premises (FTTP), by sensibly reducing the cost per customer compared to current commercially(More)