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Batteries are a fundamental part of any new electrical appliance and the increasing energy demand requires higher performance of batteries. We present a novel cathode material for LiS batteries with imporant strengths: Simple, sustainable and cost-effective production, Prevention of Shuttle Effect, High sulfur content, Higher cycle stability.

The novel mathematical concept of tangles is for the first time applied to identify highly connected regions in a graph. The applications of this analysis technique include image recognition & compression, cluster analysis & data mining and data quality assessment.

Glasses are neither fluids nor crystals. They are amorphous solids and one of the big puzzles in condensed matter physics. For decades, the question of how…

New research has identified clear signs that the hole in the Antarctic ozone layer is beginning to close.

Congestion occurs in packet-based communication networks when more traffic temporarily enters a network than can be forwarded. Congestion management detects congestion in a communication network and drops or marks packets to mitigate congestion. Still, a few heavy users can monopolize the bandwidth of a bottleneck link, e.g., by opening many flows or using non-responsive transport protocols to send at large data rate. A challenge is to drop or mark the right packets if fair capacity sharing and low delay are desired in a network.
We propose activity-based congestion management (ABC), with which users can share a network’s capacity fairly within an ABC domain while keeping packet delays low. To that end, activity meters and markers equip user traffic with activity information that reflects a user’s traffic rate. In case of congestion, traffic with high activity is preferentially dropped on bottleneck links. Thereby, users can achieve a fair share of the network’s transmission capacity.
Low delay is achieved by leveraging active queue management (AQM) in routers or switches that start dropping traffic in case of congestion to avoid extensive, permanent packet queueing. ABC-AQM is a modification of a normal AQM that increases drop probabilities for high-activity traffic and decreases them for low-activity traffic. The mechanism is easily adaptable to various AQMs.

When a woman is diagnosed with the earliest stage of breast cancer, how aggressive should her treatment be? Will the non-invasive cancer become invasive? Or is…