Roman Weidlich

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Home environments have a great potential of resource sharing and energy saving. More and more home computers are running on an always-on basis (e.g. media-centers or file-sharing clients). Such home environments have not been sufficiently analyzed regarding their energy-efficient operation, yet. This paper discusses network virtualiza-tion methods that are(More)
This paper reveals the power saving potential of P2P file sharing in two cases; popular and unpopular files. For popular files, we derive, with regard to BitTorrent, an expression for the optimal time seeders should support leechers. For unpopular files, we extend an existing model by taking into account leechers’ power consumption dependent on the load.(More)
Home networks recently gain importance due to their development from pure internal networks in form of an Ethernet LAN to converged networks integrating home, Internet, and access provider infrastructure. In emerging future home networking scenarios, service provisioning and network management is proposed by distributed architectures forming virtual home(More)
In this paper, a new architecture for sharing resources amongst home environments is proposed. Our approach goes far beyond traditional systems for distributed virtualization like PlanetLab or Grid computing, since it relies on complete decentralization in a peer-to-peer like manner, and above all, aims at energy efficiency. Energy metrics are defined,(More)
  • R Weidlich
  • 1996
Alfred Graefe is one of the three important ophthalmologists of the Graefe family in the nineteenth century, who were engaged scientifically with squint. He dealt with disorders of ocular motility in twenty publications. In: "The indication of operative treatment of paretic eye deviations" Graefe suggested three operative principles: Resection of the(More)
Among the complications after surgical interventions carried out on the Ganglion semilunare because of a trigeminal neuralgia the reason why Keratopathia neuroparalytica plays a role is the fact that it very frequently leads to partial or total blindness of the affected eye. The pathogenesis of the keratopathy is still being disputed. The appraisal of the(More)
In 1980 we started a long-term study at our department examining 54 Patients with p.c.t. (42 male, 12 female). Out of these patients, 32 were re-examined (23 male, 9 female) in 1986. No ocular lesions were found that might be attributable to the underlying disease. Possible symptoms of p.c.t. are an increased filling of the conjunctival vessels, a decreased(More)