• The Journal of the Acoustical Society of Korea
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• v.21 no.4
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• pp.170-170
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• 2002

The goal of the present research is to improve a quality of life of the elderly with a dementia. In this paper, it is realized by developing the dialog system that is controlled by three kinds of modules such as speech recognition engine, graphical agent, or database classified by a nursing schedule. The system was evaluated in an actual environment of a nursing facility by introducing it to an older male patient with dementia. The comparison study between dialog system and professional caregivers was then carried out at nursing home for 5 days in each case. The evaluation results showed that the dialog system was more responsive in catering to needs of dementia patient than professional caregivers. Moreover, the proposed system led the patient to talk more than caregivers did.

• Journal of Applied Reliability
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• v.9 no.3
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• pp.219-231
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• 2009

Power light emitting diodes(LED) for lighting fittings are so much environment-friendly, highly reliable and consume less energy that they are widely used at home and in industries such as electronics, telecommunications and industrial machineries. However, they are exposed to a very diverse environment and consists of complex components and, therefore needs careful approach to the enhancement and assessment of reliability of the item. In this article reliability assessment criteria for LED are established in terms of performance assessment test, reliability assessment test and accelerated test.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.28-28
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• 2004

• Journal of The Institute of Information and Telecommunication Facilities Engineering
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• v.9 no.1
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• pp.7-12
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• 2010

In this paper, we propose a new prioritized Optical Burst Switching (OBS) protocol based on a hop count, which can provide an efficient utilization in optical Wireless networks. Under several legacy schemes, a switch drops the burst with a shorter time among ones regardless of its traversed hop counts. As a result, the dropped burst that have been traversed more hops might cause to waste bandwidth than the one traversed a few hops. Noting that this problem, we propose the Just Enough Time (JET) with a hop count scheme which can reduce the wasted bandwidth by prioritizing the burst traversed more hops over others. From the simulation result, we show that the proposed scheme is advantageous over the legacy schemes in terms of the burst blocking probability and the link utilization.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.53 no.2
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• pp.91-96
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• 2004

In darkroom condition, it was observed that a white picture pattern lasted several minutes leaves a recognizable trace in subsequent black background picture. Although this is not a serious problem for the most current public display or home TV applications, the image sticking should be minimized for future high quality multimedia display applications. In order to characterize this picture memory effect having relatively long time scale, spatially resolved luminance measurement and light waveform measurement have been performed. Pixels located at the outer boundary of white pattern previously displayed shows highest luminance. These cells also shows fastest ignition at the ramp up reset sequence. The luminance and ignition voltage differences between boundary cells and the other cells are increased with display duration and number of sustain-pulse. It is speculated that image sticking observed at the boundary cell is originated from the transport of charged particles and re-deposition of reactive species such as Mg, O provided from strong sustain discharge region.

• Annual Conference of KIPS
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• 2002.11a
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• pp.65-68
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• 2002

최근 인터넷을 이용한 기술이 급격히 증가하고 초고속 인터넷이 보급 되면서 각 가정은 예전에 사용하던 극히 제약적인 모뎀의 속도에서 벗어나 높은 대역폭을 받는 서비스를 이용하게 되었다. 본 연구에서는 유선망과 무선망을 복합적으로 이용해 가정에서 다양한 멀티미디어를 사용할 수 있도록 네트워크 환경을 갖추는 방법을 제시하며 이들을 통합 구현 함으로써 다양한 서비스 모델을 제시하고자 한다. TV 방송과 무선랜을 이용하여 스트리밍 서비스를 댁내에서 받을 수 있도록 하였으며 외부 망과의 연동으로 예약, 시청 등을 할 수 있으며 정보 가전을 제어할 수 있도록 설계되었다.

• Annual Conference of KIPS
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• 2003.05a
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• pp.31-34
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• 2003

본 논문에서는 UPnP로 홈 게이트웨이를 구성하기 위한 미들웨어를 구성하고 UPnP 기반의 홈 미디어 서버를 구성하여, 유선 인터넷 망을 이용해서 홈 네트워크 상의 저장소에 저장되어 있는 미디어 자원들을 원격지 클라이언트에 실시간 스트리밍 서비스를 제공하는 방법을 제안한다. 또한 구성된 홈 네트워크상의 액세스 포인터를 통해 IP통신을 이용하여 Mobile 디바이스들을 통한 미디어 자원들의 스트링밍 서비스를 받는 네트워크 구현 사례를 소개한다.

• Journal of information and communication convergence engineering
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• v.2 no.3
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• pp.157-160
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• 2004

The paper's suggestion is about hereditary facts between family members. Diagnosing patients from the point of patients temporary conditions, and so performing primitive examinations and treatments, can lead not only to frequent wrong diagnoses, and to huge medical expenses and times to the patients, but even to critical situation of patients or taking lives away. As a means to cut these cases down to a minimum, sharing medical treatment information between family members is suggested. This approach makes possible understanding physical constitution and environment between family members, and can result in bringing a faster treatment effect if some family member suffers from a similar disease. This approach, since a participation in a family membership effectuates all of family members, can minimize the membership fees, thus enabling inter-family health care on a home doctor basis.

• Annual Conference of KIPS
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• 2014.04a
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• pp.1041-1042
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• 2014

최근 홈 서비스에 대한 기대가 높아지고 무선 통신기술이 발전하게 되면서 가전기기나 컴퓨터 간의 무선 제어를 통한 상호운용성에 대한 관심이 커지고 있다. 본 논문에서는, UPnP를 이용하여 홈 네트워크 시스템을 구축한다. UPnP 미들웨어는 다른 기기로 콘텐츠를 옮길 때 별도의 저장이 필요 없어 데이터 공간을 절약을 기대할 수 있다. 또한 데이터 이동 절차가 없어 활용가능성이 큰 기술로 주목 받고 있다. 이번 연구를 통해, 사용자들이 데이터를 별도의 저장매체에 옮기는 수고를 덜고, 보다 빠르고 편리하게 콘텐츠를 공유할 수 있는 기법을 제시한다.

• Journal of the Korea Society of Computer and Information
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• v.7 no.3
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• pp.99-108
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• 2002

Users location management and handoff management is constructed more effective for giving satisfaction to QoS of multimedia service in Mobility network. For this, We have the HLR of IMT-2000, difference of the HLR of PCS, and connectivity Artificial Intelligent network and to provide data service of packet that is analyze to effect on the HLR. We have a study on effective for satisfaction of QoS, that is the VHE of full concepts for provide of service in the IMT-2000, packet data service for internet connectivity, for satisfaction of QoS on basis mobility network technologies of the 2nd generation.