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집적영상 시스템에서 룩업테이블을 사용한 요소영상 배열의 효과적인 생성
권영만,김승철,김은수 한국통신학회 2008 韓國通信學會論文誌 Vol.33 No.12
본 논문에서는 컴퓨터적으로 생성하는 집적영상 시스템에서 룩업테이블(Look-up Table)을 사용해서 요소영상 배열을 효과적으로 생성하는 알고리즘을 제안한다. 이 알고리즘은 물체의 점이 픽업 면에 투영되는 위치를 찾기 위해서 x와 y의 투영 점에 대해서 서로 독립적인 룩업테이블을 작성하고 이를 사용해서 요소영상 배열을 생성하는 계산 속도를 개선하였다. 제안된 알고리즘과 기존 알고리즘의 계산 시간을 실험을 통해서 비교한 결과 제안된 알고리즘이 더 효율적임을 증명하였다.
Development of Applications for Disaster Safety Management of Traditional Markets
권영만,갈원모 대한설비관리학회 2017 대한설비관리학회지 Vol.22 No.4
While traditional markets have functioned as major trade centers that regulated regional economy in Korea in the past, they have lost their significance and popularity over the last few decades due to the expansion of Internet shopping and development of superstores and convenience stores. With lack of support from the local government, the traditional markets in the Gyeonggi province became outdated and incapable of competing against modern forms of markets. Antiquated facilities as well as insanitary surroundings of traditional markets incapacitated them from retaining their customers, and traditional markets were soon overshadowed by superstores. With close examination of the Sung-ho traditional market, an embryonic traditional market located in Jung-won gu, Sungnam city, this study aims to identify major safety problems of traditional markets. Further, the study will also introduce a smartphone disaster management application to redress those problems.
권영만 서울保健大學 1996 論文集 Vol.16 No.1
Next-generation workstation will have hardware support for multimedia data such as digital audio and video, Traditional I/O system relies on the data copy mechanism. This makes the speed gap between CPU and memory wider and does not support I/O-intensive applications well because they cannot transfer data efficiently, Therefore next-generation operating system needs new I/O system for mutimedia data, This work is to survey and classify the several mechanism to improve the I/O system for multimedia data. Most mechanism eliminates copies at one or more points in the I/0 system. These are shared memory I/O, page transfer, direct transfer. kernel stream, device stream mechanisms. Some things make use of the virtual memory, and the others make use of special hard ware features.
권영만,황혜숙,이영태,김기혜,이유리,김민철,이유나,Fu Shi Quan,Martin L. Moore,강상무 대한면역학회 2019 Immune Network Vol.19 No.3
Formalin-inactivated respiratory syncytial virus (RSV) vaccination causes vaccine-enhanced disease (VED) after RSV infection. It is considered that vaccine platforms enabling endogenous synthesis of RSV immunogens would induce favorable immune responses than non-replicating subunit vaccines in avoiding VED. Here, we investigated the immunogenicity, protection, and disease in mice after vaccination with RSV fusion protein (F) encoding plasmid DNA (F-DNA) or virus-like particles presenting RSV F (F-VLP). F-DNA vaccination induced CD8 T cells and RSV neutralizing Abs, whereas F-VLP elicited higher levels of IgG2a isotype and neutralizing Abs, and germinal center B cells, contributing to protection by controlling lung viral loads after RSV challenge. However, mice that were immunized with F-DNA displayed weight loss and pulmonary histopathology, and induced F specific CD8 T cell responses and recruitment of monocytes and plasmacytoid dendritic cells into the lungs. These innate immune parameters, RSV disease, and pulmonary histopathology were lower in mice that were immunized with F-VLP after challenge. This study provides important insight into developing effective and safe RSV vaccines.
수평식 셸-튜브형 잠열축열조의 축열 및 방열특성에 관한 실험적 연구
권영만,서해성,모정하,Kwon, Young-Man,Seo, Hye-Sung,Moh, Jung-Ha 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.1
An experimental study has been carried out in order to investigate the heat storage characteristics for a latent heat storage tank with horizontal shell and tube type. The heat exchanger consisted of horizontal cylindrical capsules with a staggered tube bank layout. Based on the obtained data, the effects of flow rate and inlet fluid temperature on the melting time and heat storage rates were examined. It is found that the melting time decreased with increase of the flow rate and the inlet temperature. Results also show that at the initial stage of heat transfer the heat storage rate represents the maximum value and rapidly decreases.
권영만,김경우,모정하 대한설비공학회 2000 설비공학 논문집 Vol.12 No.8
An experimental study has been carried out in order to investigate the heat storage characteristics for a latent heat storage tank with horizontal shell and tube type. The heat storage tank consists of cylindrical capsules with a staggered tube bank. The effects of flow rates and initial temperature differences on the melting time and heat storage rates are examined. It is found that the melting time decreases with increase of the flow rates and initial temperature differences. Results also show that the time-averaged overall heat transfer coefficients increase in proportion to the increase of flow rates and initial temperature differences.
권영만,신세연,박영진,김은수 한국인터넷방송통신학회 2011 한국인터넷방송통신학회 논문지 Vol.11 No.2
논문에서는 CCD 카메라의 영상 즉 비전만을 사용해서 도로사면 붕괴와 같은 도로 사태를 검출하는 효과적인 알고리즘을 제안하였다. 제안한 알고리즘은 영상을 비감시영역과 감시영역으로, 감시 영역은 비도로, 경계, 도로 영역으로 구분한다. 그런 후에 움직임 블록을 정의하고, 생존시간 테이블을 사용해서 움직임의 히스토리를 기억하며, 움직임의 구성요소들이 비도로 영역에서 도로 영역까지 함께 존재하는지를 확인하여 도로 붕괴 사태를 결정하였다. 실험을 통해 제안한 알고리즘이 효과적으로 도로 사태를 검출하는 것을 확인하였다. In this paper, we proposed the vision-based efficient algorithm for road slide detection like as destruction of road cut slope. The proposed algorithm defines the image region as non surveillance and surveillance which is further divided by road, boundary and non road region. After that, it find the moving block, remember the history of movement using the TTL(Time To Live) table, determine the road slide by checking the existence of moving blocks from non road region to road region together. We confirmed the proposed algorithm detected the road slide effectively through experiments.