Min Ho Park

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In this paper, we present a gesture recognition system for an interaction between a human being and a robot. To recognize human gesture, we use a hidden Markov model (HMM) which takes a continuous stream as an input and can automatically segments and recognizes human gestures. The proposed system is composed of three modules: a pose extractor, a gesture(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)
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)
In this article, we find that the limiting hop count in a lightpath impacts on the performance of optical networks. Based on this observation, we propose a dynamic hop count shifting (DYHOS) algorithm that limits the hop count of lightpaths dynamically, depending on the traffic load. The proposed algorithm searches an available route, while minimizing the(More)
Multi-walled carbon nanotubes (MWCNTs) are important materials with a unique combination of mechanical, electrical and thermal properties. MWCNTs usually exist as tangled aggregates embedding impurities such as catalysts or amorphous carbon. Therefore, purification and cutting process are essential processes to get the well-dispersed solutions in solvents(More)
We present a rigorous investigation on elution behaviors of ultrasonically shortened multiwalled carbon nanotubes in size-exclusion chromatography. The size separation of five carbon nanotube samples that underwent ultrasonic shortening for varying lengths of time revealed the existence of three kinds of carbon species: large nanotubes, small nanotubes, and(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)
This paper presents a novel QoS negotiable service framework (QNSF) to provide QoS based multiroom 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 priority(More)