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변재영,김주희 ( Joohee Kim ),성연주 ( Yeonju Seong ),안현서 ( Hyunseo Ahn ),이은영 ( Eunyoung Lee ),임지연 ( Jiyeon Lim ) 한국정보처리학회 2020 한국정보처리학회 학술대회논문집 Vol.27 No.2
기존 종이 헌혈증의 단점을 보완하기 위해, 블록체인과 DID 를 활용하여 개발한 전자 현혈증 서비스로 헌혈자에게 편리한 헌혈증 사용 및 기부 인터페이스를 제공한다.
Friction Characteristics of Aluminized Polyester Fabric under Dry- and Water- Lubricated Conditions
변재영,오케추쿠 나에메카 니콜라스,이은숙,박진규,최원식 한국트라이볼로지학회 2019 한국윤활학회지(윤활학회지) Vol.35 No.6
Materials made from plastics are increasingly utilized in constructing greenhouses and setting up shield structures. Polyester fabrics have a wide range of use in horticulture and other fields of agriculture. They are utilized as a greenhouse cover and also help in combating intense climate variation in the field. Over time, these fabrics may experience friction against other surfaces. Owing to this, the surface framework of the material degenerates. This study examines the frictional characteristics of aluminized polyester fabric in both dry- and water-lubricated environments under changing applied loads and sliding speeds. Friction experiments are performed at room temperature by employing a pin on a disk. The experiments reveal that the friction coefficient decreases with increase in applied load in both dry sliding and water-lubricated environment. However, the friction coefficient decreases more under the water-lubricated setting than in the dry state. At the maximum applied load, the highest friction coefficient is discovered in the dry state with a range of 0.282 to 0.237, whereas a friction coefficient of 0.229 to 0.189 is observed in the water-lubricated state. Additionally, it is observed that the friction coefficient increases with an increase in sliding speed under both experimental environments. The examination of specimen surfaces reveals that the abrasion is minor in the water-lubricated setting compared with that in the dry state.
무선 패킷 네트워크에서의 채널 적응형 양방향 움직임 벡터 추적 기술
변재영 대한전자공학회 2007 電子工學會論文誌-CI (Computer and Information) Vol.44 No.1
Streaming video is expected to become a key service in the developing heterogeneous wireless network. However, sufficient quality of service is not offered to video applications because of bursty packet losses. An effective solution for packet loss in wireless network is to perform a proper concealment at the receiver. However, most concealment methods can not conceal effectively the consecutively damaged macro blocks, since the neighboring blocks are lost. In the previous work, bidirectional motion vector tracking (BMVT) method has been proposed which uses the moving trajectory feature of the damaged macro blocks. In this paper, a channel-adaptive redundancy coding method for the better BMVT error concealment is presented. The proposed method provides enhanced video quality at the cost of a little bit overhead in the wireless error-prone network. 스트리밍 비디오 서비스는 최근 이종망으로 구성되는 무선망에서 중요한 어플리케이션으로 자리잡을 것으로 예상된다. 그러나 군집성있는 패킷 손실에 의해서 서비스의 충분한 품질이 보장되지 않는다. 무선망에서 패킷 손실에 대한 효율적인 해결책은 수신단에서 적절한 에러 은닉 기술을 사용하는 방법일 것이다. 그러나 대부분의 에러 은닉 기술은 손실 블록에 인접한 이웃 블록들이 군집성 패킷 손실에 의해 이미 손실되었기 때문에 효율적으로 손실된 블록열들을 복원하기 어렵다. 이를 해결하기 위해 손실된 MB에서의 움직임 선형 특성을 이용하는 bidirectional motion vector tracking (BMVT)가 이전에 제안되었었다. 본 논문에서는 BMVT 에러 은닉 기술을 향상시킨 채널 적응형 잉여 코딩 방식이 소개되어진다.
소규모 전문박물관의 전시연출에 관한 연구 -선거박물관 건립계획을 중심으로-
변재영 한국문화공간건축학회 2010 한국문화공간건축학회논문집 Vol.- No.31
In the past two decades, museums have seen rapid changes in terms of the application of information technology, which has been used to represent their collections in new ways. In recent years, the rapid growth of small scale specialized museum has become a serious concern for museum visitors and designers. A museum is a building or institution which houses and cares for a collection of artifacts and other objects of scientific, artistic, or historical importance and makes them available for public viewing through exhibits that may be permanent or temporary. New technologies are beginning to cause significant changes in the way museums perform their functions and in the way they are perceived by the public. The paradigm of museums shifts from artifact-centered to experience-centered. Museums have recently developed a strong interest in technology, as they are more than ever before in the orbit of cultural industries. They look at technology as a possible partner which can help archive a balance between culture and education as well as help them be more effective in conveying story and meaning. This study explores the theory of preliminary planning for the Museum of Elections which will be built in next few years, and deals with preliminary studies such as the definition and function of a specialized museum, changes on museums according to the times, changes in the paradigms of museums, the meaning, characteristics, technology etc, in order to establish an understanding of small scale specialized museums and technologies such as interactive media.
변재영 대한영상의학회 1990 대한영상의학회지 Vol.26 No.2
Hemangiomas of the gastrointestinal tract are rare lesions, and hemangiomas of the esophagus are extremely rare. Govoni, reviewing the literature until 1982, found only 57 cases of hemangiomas of the esophagus. We report a case of esophageal cavernous hemagioma found in a 41-year-old Korean man who had occasional dysphagia and therapeutic approach are reviewed and discussed.