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Grain boundaries in graphene are formed by the joining of islands during the initial growth stage, and these boundaries govern transport properties and related device performance. Although information on the atomic rearrangement at graphene grain boundaries can be obtained using transmission electron microscopy and scanning tunnelling microscopy,(More)
A current regulator for the resonant inverter, which chooses the nearest available voltage vector to the predicted desired voltage vector is proposed. It is proved that the proposed regulator minimizes RMS current error. The performance of the regulator is tested by computer simulations and compared with that of a conventional pulse density modulation (PDM)(More)
Although hexagonal boron nitride (h-BN) is a good candidate for gate-insulating materials by minimizing interaction from substrate, further applications to electronic devices with available two-dimensional semiconductors continue to be limited by flake size. While monolayer h-BN has been synthesized on Pt and Cu foil using chemical vapour deposition (CVD),(More)
— The home network has been revitalized due to the emergence of the broadband convergence network and the inter-networked home devices. The home gateway, which can be identified as a major component of the home network, enables to interconnect various home devices to one another as well as the Internet. Also, as the number of multimedia services, which(More)
—This paper presents a novel QoS negotiable service framework (QNSF) to provide QoS based multi-room application services. The QNSF provides service bandwidth guaranteed services as well as priority based QoS services on home server based Ethernet networks. The QNSF works on Ethernet networks and legacy network devices. Although the QNSF can support(More)
Existing video streaming protocols get poor QoE (Quality of Experience) especially when network bandwidth is drastically fluctuated due to handoff events over heterogeneous networks where they provide different bandwidths and network conditions. This paper proposes a novel QoE guaranteed mobile video streaming scheme over heterogeneous wireless networks:(More)