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Discrete event simulation of computer networks has significant scalability issues, which makes simulating large scale networks problematic. We propose to extend the approach by combining it with analytical models for network clouds, which are much more efficient, if less accurate, than node-by-node models. Thus, simulation scenarios containing several ISP(More)
Here we present a high-resolution functional magnetic resonance (fMRI) dataset - 20 participants recorded at high field strength (7 Tesla) during prolonged stimulation with an auditory feature film ("Forrest Gump"). In addition, a comprehensive set of auxiliary data (T1w, T2w, DTI, susceptibility-weighted image, angiography) as well as measurements to(More)
— Distributed systems such as peer-to-peer networks and distributed servers can optimize their performance by adapting to the end-to-end QoS of the underlying network. End-to-end measurements are an important basis for such adaptivity. Although most applications measure similar properties of the network, the measurements are mostly done in(More)
Compared to many 802.11 based networks, GSM has an significant advantage. In contrast to 802.11, GSM provides a standardized authentication scheme, which requires no configuration on the end userpsilas side, but still allows international roaming. GSM does this by using a trusted module within each client: a subscriber identification module.In contrast to(More)
With the grown popularity of the Internet and the increasing use of business and multimedia applications the users' demand for higher and more predictable quality of service has risen. A first improvement to offer better than best-effort services was made by the development of the integrated services architecture and the RSVP protocol. But this approach(More)
Virtual routers are software entities, i.e. user space processes, emulating IP routers on one or several (Linux) computers. Virtual routers can be used for both networking research and education. In contrast to simulation, virtual routers process packets in real-time and the virtual router code is similar to code in real routers. In the case of research,(More)
Using visual search, functional magnetic resonance imaging (fMRI) and patient studies have demonstrated that medial temporal lobe (MTL) structures differentiate repeated from novel displays-even when observers are unaware of display repetitions. This suggests a role for MTL in both explicit and, importantly, implicit learning of repeated sensory information(More)