• 제목/요약/키워드: 김대식

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주간졸음증 환자로부터 기면증 1예 보고 (A Case of Narcolepsy by Excessive Daytime Sleepiness)

  • 김천식;김대식
    • 대한임상검사과학회지
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    • 제37권3호
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    • pp.216-219
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    • 2005
  • We report a case of narcolepsy. A 25-year-old man has had excessive daytime sleepiness of about 10 years durations. He awakens daily feeling exhausted and continually falls asleep during the day while engaged in such situation like reading and watching television. He has exhibited cataplexy, a sudden loss of muscular tone, brought on by emotion, usually laughter. Polysomnogram revealed increased sleep stage 1, 2 and decreased deep sleep. Multiple sleep latency test (MSLT) showed that sleep latency was 1.33 minutes and there were 3 noted sleep onset rapid eye movement (SOREM) on 5 trials. The epworth sleepiness scale (ESS) was 17/24. Typing of HLA haplotype that was positive for the $DQB1^{\ast}0602$ allele, and hypocretin-1 (orexin A) could not be detected in cerebrospinal fluid (CSF). Brain MRI showed normal image. We diagnosed his case as narcolepsy based on history of cataplexy, and three occurances of SOREM, and positive of HLA haplotype.

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가스터빈 연소기에서의 연소 불안정 측정에 관한 연구 (Study on combustion instabilities in gas turbine combustors)

  • 김대식;이종근
    • 한국추진공학회:학술대회논문집
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    • 한국추진공학회 2011년도 제36회 춘계학술대회논문집
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    • pp.430-432
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    • 2011
  • 희박 예혼합 가스터빈에서 발생되는 연소 불안정 현상의 메커니즘을 규명하기 위하여 입구 속도 변동에 대한 열발생 변동을 정량화한 화염 전달 함수가 실험적으로 규현되었다. 이를 위하여 실제 가스 터빈과 유사한 형태를 갖는 모형 연소기가 제작되었으며, 열발생율의 측정을 위한 가시화 연소기가 장착되었다. 또한 흡기 속도의 변조를 위하여 가변 속도 모터 및 유량 제어 장치가 설계되었고, 이러한 장치들을 통하여 입구 속도 변동이 열발생율의 진폭에 미치는 영향 및 화염 구조의 변화를 실험적으로 계측하였다.

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치유농업 서비스 활성화를 위한 정책 우선순위 분석 (Priority Analysis of Activation Policies for Agro-healing services)

  • 배승종;김수진;김대식
    • 농촌계획
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    • 제25권3호
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    • pp.89-102
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    • 2019
  • This study was conducted to investigate priority recognition of experts and related facility operators in establishing policies for revitalizing agro-healing services. After reviewing related studies, 5 policy division and 19 detailed sector were drawn, including improving accessibility, improving promotion and information provision method, improved public relations and information provision, diversification of facility and program, financial support, and expansion of expert and specialized institutions. A questionnaire survey was conducted on agro-healing experts, agro-healing facility operators, social welfare experts, and social welfare facility operators. The AHP analysis indicated that agro-healing experts and facility operators had the highest priority in the division of expansion of expert and specialized institutions, while social welfare experts and facility operators had the highest priority in financial support. The IPA analysis was conducted to identify the priority of each policy sector. Respondents recognized above normal importance to policy divisions, but were relatively aware of the importance of improving accessibility, with overall satisfaction level appearing to be moderate. The results of this study are expected to provide useful information for establishing agro-healing policies and for establishing effective strategies.

1D 네트워크 모델을 이용한 항공용 가스터빈 연소기에서의 음향장 해석 (Acoustic Field Analysis using 1D Network Model in an Aero Gas Turbine Combustor)

  • 표영민;박희호;정승채;김대식
    • 한국추진공학회지
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    • 제23권2호
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    • pp.38-45
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    • 2019
  • 본 연구에서는 항공용 가스터빈의 연소실에서의 연소불안정 해석을 위한 고유값 도출을 목적으로 하는 1D 네트워크 모델을 개발하였다. 모델은 면적 변화가 있는 음향 네트워크 요소들 사이의 각종 지배 방정식을 통하여 개발되었고, 이를 이용하여 현재 개발 중인 복잡한 유로 형상을 갖는 실제 항공용 가스터빈 연소기에서의 음향장 해석에 적용되었다. 본 모델을 통하여 도출된 음향장 해석 결과는 3차원 유한요소해석 기반의 헬름홀츠 솔버의 계산 결과와 비교하였다.

공간규모별 치유농업단지 입지잠재력 평가 (Evaluation of Suitable Locations of Green Care Farm Complex According to Spatial Scale)

  • 임혜지;배승종;구희동;김대식
    • 농촌계획
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    • 제27권3호
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    • pp.93-102
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    • 2021
  • This study was attempted to provide a scientific basis for the problem of location selection by spatial scale for efficient promotion of projects related to green care farm complex. Location potential assessment system in local government scale consists of two major components from demand-side and supply-side consideration. The demand-side aspect considered the characteristics of potential users, while supply-side aspect used total 18 indices over 8 divisions under 3 fields. For the location potential assessment in district scale, total 8 indices under 3 major divisions were considered based on biological, physical, social, and economic environment. The application results of the location potential evaluation system in local government scale(excluding metropolitan cities) showed high location potential in southern Gyeonggi Province and near Busan Metropolitan City. As a result of applying the district-scale location potential evaluation system to Geumsan-gun, Geumsan-eup, Chubu-myeon, and Jewon-myeon have high potential. Further studies to improve the applicability of the developed indices are recommended by enhancing assessment indices, complementing base data, and reinforcing with spatial analysis.

농촌마을의 실증적 조사·진단기법 개발(I) - 델파이 설문조사를 통한 실증진단지표의 개발 - (Development of Practical Investigation and Diagnosis Model in Rural Villages - Development of Empirical Diagnostic Indicators through Delphi Method -)

  • 구희동;박미란;김대식
    • 농촌계획
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    • 제27권2호
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    • pp.91-104
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    • 2021
  • The purpose of this study is to develop the diagnostic indices system that can be applied to the evaluation of rural village level, because the indicators developed in many existing studies were mostly consisted of statistical data in higher level than rural villages as well as those were difficult to apply to rural village level empirically. In order to develop the empirical diagnostic indices system, which has 52 indices with 7 categories, this study not only classified the kind of rural village facility and the regional development project of government, but also surveyed the specialist opinion with Delphi method. Especially, this study standardized the all diagnostic indices with positive value to remove the indices with negative values. Finally, the results that the study applied the empirical diagnostic indices to the 15 sample villages of Jinan-gun and Cheongyang-gun showed that there was the applicability of the indices system in the village level.

치매환자의 인지기능, 우울, 자아존중감, 일상생활수행능력에 미치는 원예치유 효과 - 체계적 문헌고찰 및 메타분석 - (The Effect of Horticultural Therapy on Cognitive Function, Depression, Self-esteem and Activity Daily Living(ADL) in Dementia Care - A Systematic Review and Meta-Analysis -)

  • 배승종;이선희;김대식
    • 농촌계획
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    • 제27권4호
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    • pp.97-107
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    • 2021
  • The purpose of this study is to systematically review and to objectively identify the effect size in order to understand the effects of horticultural therapy on cognitive function, depression, self-esteem, and activity daily living(ADL) of dementia patients. Related studies published in Korean and English were selected by searching domestic and foreign academic databases. The risk of bias assessment of individual studies was performed on the included 18 literatures. Horticultural therapy was found to be significantly effective in cognitive function(effect size=1.06), depression(effect size=0.64), self-esteem(effect size=0.99), and ADL(effect size=1.98) in dementia care. It is expected that related experimental studies will be repeatedly conducted to produce a more objective effect size calculation.

농촌마을의 실증적 조사·진단기법 개발(II) - 효율적 적용절차 및 조사방법론 개발 - (Development of Practical Investigation and Diagnosis Model in Rural Villages(II) - Development of Efficient Application Procedures and Investigation Methodologies -)

  • 구희동;박미란;김대식
    • 농촌계획
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    • 제27권4호
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    • pp.109-122
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    • 2021
  • The purpose of this study is to develop a application procedure and survey method for the empirical diagnostic indices system. In order to know the survey method, which has 65 investigation items for 52 indicators, this study not only presented so that the each survey items could be surveyed in at least 1 to 3 steps, but also presented the 4 survey method for each investigation items: preliminary survey, administrative survey, field survey, and interview survey. As a result of applying to 15 sample villages, the period of surveying a village of 100 households was 1.4 days, and it was confirmed that the survey was generally efficient in a short time. As a result of applying the survey system to the sample village, the developed survey system showed the possibility of investigating even the details of rural villages. Therefore, it was judged that it could be used as a basic procedure for a rural village unit survey.

국내 초등학생 대상 동물 매개 중재에 관한 체계적 문헌 고찰 (The Effect of Animal Assisted Therapy for Elementary Students - A Systematic Review -)

  • 배승종;김대식;이선희;배주연
    • 농촌계획
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    • 제28권3호
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    • pp.83-94
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    • 2022
  • This study was attempted to systematically analysis the characteristics and effects of studies that applied animal assisted therapy to elementary students. Literature searches were conducted in 4 domestic academic databases(RISS, KISS, ScienceON, KMBASE). The characteristics of selected 26 studies were individually analyzed and described by publication year, research method, subject characteristics, intervention characteristics, and outcome variables, and the characteristics of the study were systematically summarized. The effect of the assisted therapy was divided into psychological-emotional effect, interpersonal effect, and other effect. Most of the psychological-emotional indicators and interpersonal relationship indicators were found to be effective, and inconsistent results were found for some indicators. It is expected that it can be used as a useful data when conducting assisted therapy studies targeting elementary school students in the future.

사인-스윕 가진 모델을 통한 가스터빈 연소기의 음향 동적 반응 해석 (Acoustical Dynamic Response Analysis of a Gas Turbine Combustor Using a Sine-Sweep Forcing Model)

  • 손주찬;김대식
    • 한국추진공학회지
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    • 제26권4호
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    • pp.1-9
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    • 2022
  • 본 연구에서는 외부 음향장 가진에 따른 시스템의 동적 응답 특성을 파악하기 위하여 기존의 네트워크 모델에 스피커를 통한 외부 사인-스윕 가진 기능을 추가한 수치해석적 모델이 개발되었다. 본 모델을 통하여 대상 연소기의 물리적 치수 및 경계조건과 같은 시스템 매개변수에 따른 주파수 및 압력 진폭 변화의 민감도를 넓은 주파수 영역에서 분석하였다. 대상 연소기의 가진 응답 특성 분석 결과, 높은 동압 반응을 보이는 주파수 영역은 동일 연소기에서 계측된 불안정 범위와 유사하였으며, 특히 음향 가진 소스항의 위치에 따라 시스템의 반응이 크게 의존하는 것으로 나타났다.