데스크탑 가상화에서 HDFS를 이용한 서비스 제공시간 개선 연구

이완희,이봉환,Lee, Wan-Hee,Lee, Bong-Hwan 한국정보통신학회 2012 한국정보통신학회논문지 Vol.16 No.5

기존의 PC 기반의 데스크탑 환경은 보안, 이동성, 업그레이드 비용 감소 등의 장점으로 인하여 서버 기반의 가상데스크탑 환경으로 바뀌고 있다. 본 논문에서는 오픈 소스 기반의 클라우드 컴퓨팅 플랫폼과 하이퍼바이저를 이용한 데스크탑 가상화 시스템을 구축하여 이를 대학의 컴퓨터 실습실에 적용하였으며, 가상화 서비스 제공시간을 개선하기 위하여 HDFS를 이용한 해결 방법을 제안하였다. 또한, HDFS를 사용하여 데스크탑 가상화 서비스에 필요한 이미지 관리 구조를 설계하고 구현하였으며, 이를 실제 PC 30대를 운영하는 실습실에 적용하여 구축비용, 전원절약율, 라이센스 비용 절감율 및 관리 비용 등 네 가지 측면에서 기존시스템과 비교하였다. 실험 결과 HDFS를 이용하였을 경우 데스크탑 가상화를 서비스하기 위한 이미지 전송시간을 대폭 줄일 수 있었다. The current PC-based desktop environment is being converted into server-based virtual desktop environment due to security, mobility, and low upgrade cost. In this paper, a desktop virtualization system is implemented using an open source-based cloud computing platform and hypervisor. The implemented system is applied to the virtualziation of computer in university. In order to reduce the image transfer time, we propose a solution using HDFS. In addition, an image management structure needed for desktop virtualization is designed and implemented, and applied to a real computer lab which accommodates 30 PCs. The performance of the proposed system is evaluated in various aspects including implementation cost, power saving rate, reduction rate of license cost, and management cost. The experimental results showed that the proposed system considerably reduced the image transfer time for desktop service.

정상 성인 휴지종골 입각각도와 자세동요와의 관련성 연구

이완희,이승원,Lee, Wan-Hee,Lee, Seung-Won 대한물리치료과학회 2004 대한물리치료과학회지 Vol.11 No.2

The purpose of this study was to investigate the relationship between normal adults' resting calcaneal stance position(RCSP) and postural sway. Subjects were 70 normal adults(34 men and 36 women) in their twenties who attend S. University. Postural sway during a single limb stance was measured using the CMS 10 Measuring System when subjects positioned on the balance trainer in their bare foot. RCSP while subjects were standing on the glass plate was measured using the angle tinder after subjects were positioned in prone to divide equally lower leg and calcaneus using the goniometer. The result was as follows. There were significant weak positive correlations between RCSP and postural sway(r=0.362, p<0.01), the leg of the small RCSP within a subject has the small postural sway index($X^2=43.758$, p<0.001). There was no significant difference between groups of rearfoot valgus(RCSp<$2^{\circ}$) and those of rearfoot varus (RCSp>$2^{\circ}$) in the postural sway. In conclusion, there is a weak relationship between increasing the absolute value of RCSP and increasing postural sway.

발 보조기 착용이 요통환자의 골반 변위와 통증 변화에 미치는 영향

이완희,박대성,Lee, Wan-Hee,Park, Dae-Sung 대한물리치료과학회 2005 대한물리치료과학회지 Vol.12 No.4

The purpose of this study is to investigate the effect of low back pain(LBP) and pelvic displacement on foot orthosis. Before and after experiments were designed to compare the effect. 21 LBP patients who were the subjects diagnosed of applying foot orthosis for 3 weeks after, investigated about pelvic obliquity angle, displacement of ilium, lumbo-sacral angle by x-ray test which is one of pelvic displacement tests, visual analogue scale is used for LBP measurement. The result show the followings; First, Pelvic obliquity angle was significantly reduced after applying foot orthosis compared before using it(p<.05). Second, Displacement of ilium was significantly reduced after applying foot orthosis compared before using it(p<.05). Third, Lumbo-sacral angle was significantly reduced after applying foot orthosis compared before using it(p<.05). Fourth, LBP was significantly reduced after applying foot orthosis compared before using it(p<.05). This study tries to suggest new LBP treatment to reduce pelvic displacement by apply foot orthosis. In conclusion, foot orthosis reduces pelvic obliquity angle, displacement of ilium, lumbo-sacral angle and also decrease LBP. Further more, It needs of biomechanical study which can recognize relation between foot arch and pelvic displacement. This study will serve as a clinically useful data for diagnosis and treatment of LBP and biomechanical analysis of lower limb.

안양시 유휴부지 활용방안에 관한 연구

이완희 ( Wan Hee Lee ),장준호 ( June Ho Jang ) 한국지역사회발전학회(구 한국지역사회개발학회) 2015 地域社會開發硏究 Vol.40 No.1

안양시에는 기능이 부여되지 않은 유휴부지가 다수 존재하고 있다. 특히 유휴부지가 안양시 도심에 위치하고 있어 부지의 활용이 시급하다. 안양시에서도 이들을 활용하기 위하여 다양한 방안을 고민하고 있지만 뚜렷한 방안은 내놓고 있지 못한 실정이다. 이에 본 연구에서는 유휴부지의 효과적인 활용방안을 도출해 내고자 한다. 이를 위하여 유휴부지의 이론적 배경과 선행연구의 검토를 수행하였다. 다음으로 안양시 유휴부지의 일반현황과 국내외 유휴부지의 사례를 분석하였다. 분석을 바탕으로 다음과 같은 활용방안을 도출하였다. 첫째, 유휴부지에 문화·예술의 기능을 부여하여 도시재생에 한 축을 이루는 방안이 있다. 둘째, 유휴부지를 활용하여 지역의 정체성을 확립하고 이미지를 개선하고자 하였다. 본 연구에서는 안양시 유휴부지 활용에 대한 정책적인 틀을 제시한바 향후 세부적인 계획의 수립이 필요할 것으로 생각된다. There exist many unused sites whose function isn``t invested in Anyang City. Particularly, site utilization is urgent as they are located in the downtown area of Anyang City. Anyang city government is also trying to come up with diverse schemes in an effort to utilize these sites, but actually, they are failing to put forth a distinct plan. Hereupon, this study is aimed at drawing an effective utilization plan for unused sites. For this purpose, this study carried out the examination of the theoretical background of and the preceding researches on unused sites. Next, this study analyzed the general status of unused sites of Anyang City, and cases of domestic & overseas unused sites. On the basis of the analysis, this study drew the utilization plan as follows: First, there is a plan that makes it possible to form an axis of urban regeneration by investing unused sites with the function of culture and art. Second, this study intended to establish regional identity and improve its image by applying unused sites. Not that this study suggested a policy framework of utilization of unused sites in Anyang City, it is thought that there is the need for detailed plan establishment for the time to come.

연구논문(硏究論文) : 시비수준과 차광처리가 자생 Thalictrum속 식물의 유묘생장에 미치는 영향

이완희 ( Wan Hee Lee ),이승연 ( Seung Youn Lee ),강정화 ( Jung Hwa Kang ),이택주 ( Taek Joo Lee ),김기선 ( Ki Sun Kim ) 한국환경복원기술학회 2015 한국환경복원기술학회지 Vol.18 No.1

Thalictrum species belongs to the Ranunculaceae and are perennial landscape plants which are available in the garden and potted plants. This experiment was conducted to find out the basic data for the growth effects of fertilizer levels and shading rate in seedling plug cell tray in the Thalictrum rochebrunianum, T. uchiyamai and T. coreanum. For T. rochebrunianum and T. uchiyamai, growth increased by all fertilizer level treatments as compared to non-treatment. Hyponex 1000 times of treatment showed the highest growth. All growth increased in 35% shading as compared to other treatments for T. rochebrunianum and T. coreanum. But, for T. uchiyamai growth increased in 55% shading. In general, growth of three Thalictrum species was worse in 75% shading, as compared to other shading rates. Based on the results, Thalictrum species seedling can be produced by 35-55% shading and fertilization of Hyponex 1000 times by using plug tray.

가정용 게임기를 이용한 가상 운동 프로그램이 여성 노인의 낙상관련 체력요인에 미치는 영향

이완희(Wan Hee Lee),조기훈(Ki Hun Cho),김성호(Seong Ho Kim),이제훈(Jei Hun Lee) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.44

The purpose of this study was to evaluate the effect of virtual reality-based exercise programs by using a video game, Wii-Fit, on the balance, gait, and fall prevention in the elderly women. The subject of this study were 17 elderly women. They were randomly divided into two groups; exercise group(9, age: 76.33yrs), control group (8, age: 74.37yrs). The exercise group participated in the virtual reality-based exercise program twice a week for 8 weeks and the control group received fall prevention education. Gait ability evaluation, Timed up and go test(TUG), Functional reach test(FRT), and Reaction time(RT) test of all subjects were measured before and after they participated in the 8 week program. The results were as follows: Gait abilities of exercise group were significantly higher than the control group(p<.05). There were no significant improvements in gait parameters in the controls. TUG was faster than the control group. FRT and RT were better than the control group(p<.05). In conclusion, virtual reality game, Wii-Fit, improved gait ability, balance and can prevent falling in elderly women.

파스카 完決儀式의로서의 葬禮

이완희(Wan Hee Lee) 인천가톨릭대학교 복음화연구소 2001 누리와 말씀 Vol.- No.10

성별에 따른 청소년들의 생활패턴과 비행과의 관계 - 사회유대이론과 일상생활이론을 중심으로 -

이완희(Wan-Hee, Lee) 한국범죄심리학회 2017 한국범죄심리연구 Vol.13 No.4

이 연구는 사회유대이론에서 설명하는 참여와 일상생활이론에서 설명하는 생활패턴이 청소년비행에 어떤 영향을 미치는지를 설명하는데 그 목적이 있다. 이를 위해 이 연구는 한국청소년정책연구원에서 수집한 한국 아동·청소년패널(KCYPS) 자료의 중1 패널 데이터 2차년도의 자료를 사용하여 청소년들의 생활패턴에 미치는 영향을 살펴보았다. 경로분석(path analysis)을 활용한 연구결과 성별에 따라 생활패턴은 확연하게 차이가 나는 것을 볼 수 있으며 생활패턴이 가시성과 구조성이 떨어질수록 청소년 비행에 영향을 주는 것으로 나타났다. 남자청소년보다 여자청소년이 가시성과 구조성이 떨어지는 공간에서 시간을 많이 보낼수록 청소년비행에 영향을 주는 것으로 나타났다. 따라서 성별에 따른 생활패턴을 좀 더 이해하고 가시성(visibility)과 구조성 (instrumentality)이 떨어지는 활동 즉 사회통제(social control)를 강화하고 그에 따른 여러 가지 정책적 대안들이 마련된다면 우리 사회에서 청소년비행을 좀 더 획기적으로 줄일 수 있을 것이다. The purpose of this study is to explain how the life patterns explained in the social bonding theory and routine activity theory explained in lifestyle pattern affect the juvenile delinquency. In this study, path analysis was used to investigate the effects of the life patterns of adolescents using data from the second wave panel data of KCYPS collected from the Korea Youth Policy Institute. As a result of using path analysis, it was found that the life pattern was significantly different according to gender, and the more the visibility and the structure of the life pattern were, the more the effect was on the juvenile delinquency. The more time spent in the place where the visibility and the instrumentality are lower, the more the juvenile delinquency affects the juvenile delinquency. Therefore, if we understand the life patterns according to gender,strengthen visibility and instrumentality, strengthen social control, and provide various policy alternatives accordingly, It will be possible to reduce it further.

엽삽에 의한 Ornithogalum Hybrid ‘Dancing Cloud’의 대량번식

이완희(Wan Hee Lee),서정근(Jeung Keun Suh),주문갑(Moon Kap Joo) 한국원예학회 2000 원예과학기술지 Vol.18 No.1

The Influence of Changes in Self-Control on the Trajectory of Juvenile Delinquency among South Korean Youth

이완희(Lee Wan Hee) 한국공안행정학회 2012 한국공안행정학회보 Vol.21 No.3

지금까지 자기통제이론은 가장 많이 연구가 된 이론임에도 불구하고 대부분은 횡단연구로서 자아통제력이 청소년 비행에 미치는 영향을 주제로 다루어 왔다. 그러나 종단연구 데이터 분석이 가능해지면서 청소년 비행 궤적의 변화 분석도 가능해졌다. 본 연구는 중학교 2학년에서 고등학교 3학년까지의 청소년 비행의 발달궤적을 알아보고, 자아통제력이 발달궤적에 미치는 영향을 알아보는 것을 목적으로 하였다. 이를 위해 잠재성장모델(Latent Growth Curve Modeling)을 적용하여 시불변변수(Time-Invariant Variable)인 성별, 가족소득, 모친의 고용여부를 통하여 청소년비행 발달궤적에 미치는 영향을 알아보았다. 또한 시변변수(Time-Variant Variable)인 부모의 통제와 자아통제력을 추가하여 시변변수가 청소년비행의 발달궤적에 미치는 직/간접적인 영향을 알아보았다. 한국청소년패널조사(KYPS) 중학교 2학년 패널의 1~5차년도 자료(2003~2007)를 사용하여 잠재성장모델을 적용해본 결과, 발달궤적은 다소 감소하는 것으로 나타났고, 성별과 낮은 자아통제력이 발달궤적에 유의한 영향을 주는 것으로 나타났다. 특히 1차년도부터 5차년도까지 자아통제력과 청소년비행의 발달궤적이 변화함에도 불구하고 유의미한 영향을 미치는 것으로 나타났다. 또한 부모통제는 자기통제력을 통하여 청소년비행 발달궤적에 간접적인 영향을 미치는 것으로 나타났다. At the present time, self-control theory is presently the most frequently tested theory in the field of criminology. However, most studies focused on the relation between self-control and juvenile delinquency with cross-sectional data which is a single assessment from one moment in time. Since longitudinal data has become more readily available there has been increase in empirical studies that focus on the effects and changes of delinquent behavior in juveniles during the adolescent period. The purpose of this study is to describe and identify a developmental pathway of juvenile delinquency among South Korean adolescents aged between 15 and 19 years. LGM was employed to examine the direct and indirect influence of changes in the levels of self-control and parental control on the trajectory of juvenile delinquency over time. A five-year longitudinal data from the Korea Youth Penal Study(KYPS) was used to assess the relationships between juvenile delinquency and self-control. The results of LGM suggested that gender and low self-control demonstrated significant effects on juvenile delinquency over time. The most important finding is a significant relationship between low self-control and juvenile delinquency, despite the fact that development in low self-control covaries with development in juvenile delinquency over time. Also, the results showed that parental control indirectly affected juvenile delinquency through self-control over the five-year period.