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시각 통제를 이용한 균형훈련이 만성 뇌졸중 환자의 균형능력과 자세조절, 균형자신감에 미치는 영향
정성화,구현모,Jeong, Seong-Hwa,Koo, Hyun-Mo 대한고유수용성신경근촉진법학회 2020 PNF and Movement Vol.18 No.1
Purpose: The purpose of this study was to conduct balance training through vision control to improve the balance, postural control, and balance confidence and to decrease the visual and sensory dependence of stroke patients. Methods: Twenty-eight chronic stroke patients volunteered to participate in the study. They were randomly assigned to the eyes-closed and the eyes-open training groups. Three times a week for four weeks each group performed an unstable-support session and a balance training session for thirty minutes per set. Their balance, postural control, and balance confidence were assessed using BIO Rescue (BR), the postural assessment scale for stroke (PASS), and the Korean activity-specific balance confidence scale (K-ABC), respectively. All data were analyzed using SPSS version 22.0. Statistical methods before and after working around the average value of each dataset were independent T-test. The significance level for statistical analyses was set at 0.05. Results: Comparison between the groups showed statistically significant effects on all variables before and after the intervention (p < 0.05). Conclusion: This study reflected that balance-training programs involving vision control improve the balance, postural control, and balance confidence of chronic stroke patients. Thus, stroke patients should undergo training programs that increase the use of their other senses with vision control in clinical practice.
정성화,강대룡,허남욱,김진흠,이순영,정상혁,남정모,Jeong, Seong-Hwa,Kang, Dae-Ryong,Hur, Nam-Wook,Kim, Jin-Heum,Lee, Soon-Young,Jung, Sang-Hyuk,Nam, Chung-Mo 대한예방의학회 2006 예방의학회지 Vol.39 No.4
Objectives: The purposes of this study were to propose a screening schedule for the early detection of breast cancer among Korean women, as based on the statistical model, and to compare the efficacy of the proposed screening schedule with the current recommendations. Methods: The development of the screening schedule for breast cancer closely followed the work of Lee and Zelen (1998). We calculated the age-specific breast cancer incidence rate from the Korea Central Cancer Registry (2003), and then we estimated the scheduling of periodic examinations for the early detection of breast cancer, using mammography, and based on the threshold method. The efficacy of the derived screening schedule was evaluated by the schedule sensitivity. Results: For estimating the screening schedule threshold method, we set the threshold value as the probability of being in the preclinical stage at age 35, the sensitivity of mammography as 0.9 and the mean sojourn time in the preclinical stage as 4 years. This method generated 14 examinations within the age interval [40, 69] of 40.0, 41.3, 42.7, 44.1, 45.4, 46.7, 48.0, 49.3, 51.0, 53.2, 55.3, 57.1, 59.0 and 63.6 years, and the schedule sensitivity was 75.4%. The proposed screening schedule detected 85.2% (74.5/87.4) of the cases that could have been detected by annual screening, but it required only about 48.7% (14.0/30.0) of the total number of examinations. We also examined the threshold screening schedules for a range of sensitivities of mammography and the mean sojourn time in the preclinical stage. Conclusions: The proposed screening schedule for breast cancer with using the threshold method will be helpful to provide guidelines for a public health program for choosing an effective screening schedule for breast cancer among Korean women.
푸리에 변환 적외선 분광분석에 의한 에피층의 두께 측정 기술
정성화,김상기,권오준,Jeong, Seong-Hwa,Kim, Sang-Gi,Kwon, Oh-Joon 한국전자통신연구원 1991 전자통신 Vol.13 No.2
에피택시층의 두께는 푸리에변환적외선분광분석(FTIR)을 이용하여 간단하고 비파괴적으로 측정할 수 있음이 알려져 있다. 본고에서는 측정법의 기본적인 배경을 살펴보고 실제 시편의 측정결과를 제시하며 본 두께 측정법의 적용 가능성 및 문제점에 대해 논의한다.
MMORPG 온라인게임의 변화와 성장을 위한 디자인 설계 TIME FLOW 시나리오 연구
정성화(Jeong, Seong Hwa),경병표(Kyung, Byung Pyo),이동열(Lee, Dong Lyeor),이완복(Lee, Wan Bok),유석호(Ryu, Seuc Ho) 한국게임학회 2015 한국게임학회 논문지 Vol.15 No.4
국내 MMORPG 온라인게임 시장의 동향을 보면 이용자들의 트렌드 변화와 모바일게임 및 해외 게임의 강세로 성장이 정체되어 있는 실정이다. 이렇게 국내 게임이 성장하지 못하는 근본 원인은 변화 없이 기존 게임 형태 그대로 양산되어 출시되는 현 시장의 잘못된 모순과 각종 플레이로 인해 생기는 문제점들이 서비스 실패의 주원인이다. 이에 본 논문에서는 게임 디자인의 변화를 주기 위한 방법으로 시나리오의 중요성 및 필요성을 입증하고 기존 게임이 가지고 있는 문제들을 이용자들의 의견수렴과 성공한 국내 및 해외 게임들을 비교 분석하여 새로운 타입의 TIME FLOW 시나리오를 제안하고자 한다. 이 기법은 게임 내 시간이 흘러 환경과 스토리가 자연적으로 변화되면서 그에 따른 수많은 콘텐츠를 이용자들에게 제공하게 되는 시스템 설계 구축을 목표로 한다. 이를 통해 새로운 형태의 게임 제작 환경 틀을 설계하고 교육적인 인재 양성 효과를 기대한다. The trend in the domestic MMORPG online game market is on decline because of the change in customers attitude and the advent of mobile or foreign games. The underlying cause of depressed domestic game market is that it has been failing to provide quality service arising from not revising existing game design. For this reason, this paper sets out to gather game users' opinions and to analyze successful domestic and foreign games comparatively to approve the importance and necessity of scenario development and to solve current problems in the MMORPG market. As one solution, this paper proposes a new design method, TIME FLOW scenario technique. This technique aims to establish a system in which story and environment change as time progresses and thus can provide different contents to its users over time. It is expected to enable a new frame for game design environment and to restructure education environment for human resource cultivation.
SELinux 기반 안드로이드 보안시스템 구축에 관한 연구
정성화(Jeong, Seong-Hwa),노태정(Lho, Tae-Jung) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.8
최근 고성능의 스마트 폰이 속속 등장하면서 스마트 폰의 보안 문제가 대두되고 있다. 특히 오픈 플랫폼의 경우엔 더욱 바이러스의 타겟이 되기 쉬워졌다. 또한, 시만텍, 안철수연구소 등 많은 보안솔루션 업체들이 모바일 보 안 시스템을 개발하고 있지만, 아직 Android 관련 보안 프로그램은 상용화된 제품이 없는 실정이다. 이러한 문제를 사전에 해결하기 위해 오픈 플랫폼 중의 하나인 Android 상에 일반 Linux에서 동작하는 SELinux를 사용할 수 있도록 환경을 구축하여 Android 시스템의 보안 기능을 개발하였으며, S3C6410 상에서 사용자 어플리케이션을 검증하였다. As soon as high-performanced smart phones is rapidly emerging in recent, its security problems come to the front. Especially in case of an open platform, it is easy to be a target of virus. Many security solution industries such as Symantec and Ahnlab are developing a mobile security system, but they have not yet a commercial product. We developed the effective security function of Android system based on SELinux to solve this problem, and verified its performance by applying the user applications developed to S3C6410 board.