The copper access-network operators face the challenge of developing and maintaining cost-effective digital subscriber line (DSL) services that are competitive to other broadband access technologies. The way forward is dictated by the demand of ever increasing data rates on the twisted-pair copper lines. This forces a deployment of the DSL transceivers in cabinets closer to the customers with a...

Based on an analysis of previous telescience related activities a number of topics are discussed requiring further work from a utilization technology point of view: flexibility in data handling, remote use of high performance digital cameras, data networking and user workstations for remote operations based on visual feedback.

With the explosive growth of data available on the Internet, personalization of this information space become a necessity. An important component of web personalization is the automatic knowledge extraction from web log files. However, analysis of large web log files is a complex task not fully addressed by existing web access analyzers. Using commercial software, we applied well-known data min...

A neural network based technique is introduced which hides the control latency of reconfigurable interconnection networks (INs) in shared memory multiprocessors. Such INs require complex control mechanisms to reconfigure the IN on demand, in order to satisfy processor-memory accesses. Hiding the control latency seen by each access improves multiprocessor performance significantly. The new techn...

Signal superposition and broadcast are important features of the wireless medium. Compute-and-Forward, also known as Physical Layer Network Coding (PLNC), is a technique exploiting these features in order to improve performance of wireless networks. More precisely, it allows wireless terminals to reliably decode a linear combination of all messages, when a superposition of the messages is recei...

This paper studies media access protocols which support collision-free broadcast/multi-cast communication for optically connected star-coupled systems with Wavelength Division Multiple Access channels. An early hybrid access protocol, consisting of reservation and of receiver channels pre-allocation, allows reservation for exactly one WDM channel per node during the reservation phase. We extend...

background conservative surgical treatment has been the treatment of choice for early breast cancer. it allows feasible oncological treatment with a satisfactory cosmetic approach and fast recovery. however, in some cases mastectomy is necessary. this study proposes a surgical approach with only one surgical access through the same incision, which is in line with precepts mentioned above. it is...

We consider an ADSL access network consisting of subscribers, DSLAMs, metro Ethernet switches and a broadband remote access aggregation server (BRAS). We obtain expressions for dimensioning the access network in the upstream direction. Specifically, we show that the bandwidth required at each DSLAM, metro Ethernet switch, and BRAS can be expressed as an exponential function of the subscribers i...

This paper compares the approaches taken by the managers of a small regional power grid utility cooperative and a small, privately held local loop telephone company who sought to make high-speed internet access available to their rural customers. Both the power cooperative and the telephone company set out to extend their product service mix, revenue streams, and profit margins by implementing ...