건강보험과 의료급여 환자간의 정신요법 진료량 차이 비교 - 정신병원 입원환자를 대상으로 -

이대희,박은철,남정모,이상규,이동한,유승흠,Lee, Dae-Hee,Park, Eun-Cheol,Nam, Chung-Mo,Lee, Sang-Gyu,Lee, Dong-Han,Yu, Seung-Hum 대한예방의학회 2003 예방의학회지 Vol.36 No.1

Objectives : To assess the difference in the volume of psychiatric treatments provided to health insurance inpatients, compared with those on medical assistance(the medical aid program) Korean psychiatric hospitals, and to determine factors which affect the volume of the services. Methods : 21 psychiatrists, from 3 Korean psychiatric hospitals recorded the frequencies psychiatric treatments provided to inpatients in one week (February 18-24, 2002). The records of 329 patients were analyzed through t-tests, and random effectmixed model analyses to define the difference between the two groups, and to find other factors affecting the volume of service. Results : A significant difference in the volume of psychiatric treatments provided was observed between the health insurance and medical assistance groups. The variation in the volume of service between hospitals was prominent, and other factors (gender, agegroup, length of stay and mental disorder)were also found to be significant. The patients on medical assistance received only 70% of the psychiatric treatments of those on health insurance. Conclusions : More effort is required to improve the methods of payment to increase the level of fee scheduling for medical assistance. Further studies on the mechanisms causing these differences in the volume of service are required.

ORFEUS 위성을 이용한 성간 수소분자의 전천 관측

이대희,선광일,민경욱,Lee, Dae-Hee,Seon, Kwang-Il,Min, Kyoung-Wook 한국천문학회 2005 天文學論叢 Vol.20 No.1

We present measurements of interstellar $H_2$ absorption lines in the continuum spectra of 54 early-type stars in the Galactic disk and halo and 3 stars in the Magellanic Clouds. The data were obtained with the Berkeley Extreme and Far-Ultraviolet Spectrometer (BEFS), part of the ORFEUS telescope, which flew on the ORFEUS-SPAS I and II space-shuttle missions in 1993 and 1996, respectively. The spectra extend from the interstellar cutoff at $912{\AA}$ to about $1200{\AA}$ with a spectral resolution of ${\sim}3000$ and statistical signal-to-noise ratios between 10 and 65. Assuming a velocity profile derived from optical observations (when available), we model the column densities N(J) of the rotational levels J = 0 through 5 for each line of sight. Our data reproduce the relationships among molecular and total hydrogen column density, fractional molecular abundance, and reddening first seen in Copernicusobservations of nearby stars (Savage et al. 1977). The results show that most of these molecular clouds have $H_2$ total column densities between $10^{15}cm^{-2}$ and $10^{21}cm^{-2}$, and kinetic temperatures from 21 K to 232 K, with average of 89 K, consistent with the result of Copernicus (Savage et al. 1977).

관계기관 소개 1 - 주식회사 에코원

이대희,Lee, Dae-Hui 한국하천협회 2009 하천과 문화 Vol.5 No.4

편광분석을 이용한 2차원 위상지연 분포 측정과 ABF 필름의 공정 최적화에 관한 연구

이대희,최세진,방주엽,김동진,김한성,Lee, Dae Hee,Choi, Se Jin,Bang, Ju Yup,Kim, Dong Jin,Kim, Han Seong 한국섬유공학회 2016 한국섬유공학회지 Vol.53 No.1

Polarimetry is a non-destructive technique that measures the degree of rotation of polarized light passing through an optically active material. Optical activity is determined by various factors, including intrinsic optical properties and residual stress. Thus, polarimetry can be used in various fields. In this study, polarimetry was used to evaluate the two-dimensional spatial uniformity of optical birefringence in an Ajinomoto build-up film. This analysis can predict the optimal cure condtitions of the film, which creates a uniform phase retardation distribution.

우주용 적외선 냉각시스템 시험모델 성능 평가

이대희,양형석,남욱원,이성호,진호,김동락,박수종,김병혁,박성제,Lee, D.H.,Yang, H.S.,Nam, U.W.,Lee, S.,Jin, H.,Kim, D.L.,Pak, S.,Kim, B.H.,Park, S.J. 한국천문학회 2006 天文學論叢 Vol.21 No.2

We have tested the performance of the Proto-model of Space Infrared Cryogenic System (PSICS), which is a small infrared camera, developed by Korea Astronomy and Space science Institute (KASI), Korea Basic Science Institute (KBSI), Korea Institute of Machinery and Materials (KIMM), and i3system co., as a cooperation project. The purpose of PSICS is to ensure a technology of small infrared cryogenic system for future development of space infrared (IR) cameras. PSICS consists of cryogenic part, IR sensor and electronics part, and optical part. The performance test of each part and the integrated system has been completed successfully. PSICS will be used as a guiding camera for ground-based IR telescopes and a test system for developing a space-borne instrument.

SPICA 탑재용 근적외선카메라 FPC 개발 현황

이대희,정웅섭,한원용,문봉곤,박영식,박귀종,남욱원,표정현,이덕행,박원기,김일중,Lee, Dae-Hui,Jeong, Ung-Seop,Han, Won-Yong,Mun, Bong-Gon,Park, Yeong-Sik,Park, Gwi-Jong,Nam, Uk-Won,Pyo, Jeong-Hyeon,Lee, Deok-Haeng,Park, Won-Gi,Kim, Il-Ju 한국천문학회 2012 天文學會報 Vol.37 No.2

FPC (Fine-guiding and astroPhysics Camera)는 일본 ISAS/JAXA, 유럽 ESA에서 공동 개발하는 대형적외선우주망원경 SPICA (Space Infrared Telescope for Cosmology and Astrophysics)에 탑재하기 위하여 천문연이 주도하는 한국의 컨소시움에서 개발을 추진하고 있는 정밀 근적외선 카메라이다. FPC는 과학적 목적을 위한 FPC-S와 정밀 자세결정을 위한 FPC-G로 이루어져 있으며 관측 파장 대역은 0.7-5 um이다. FPC-G는 0.05 각초의 초정밀 자세 결정을 위한 기능을 갖추고 있으며, FPC-S는 선형변화필터 LVF (Linear Variable Filter) 등을 사용하여 Pop III stars, High-redshift 영역에서의 별탄생 및 은하 진화 과정에 대한 연구를 수행할 수 있다. FPC는 상대적으로 시스템 자원을 덜 소모하기 때문에, 다른 중 적외선 원적외선 기기와 동시 관측이 가능하다. 다른 기기들과의 잘 짜여진 협력 관측을 통하여, FPC의 활용도를 높일 계획이다.

완전 발달된 원형 충돌제트의 노즐 직경이 열전달에 미치는 영향

이대희,원세열,이영민,조헌노,Lee, Dae-Hee,Won, Se-Youl,Lee, Young-Min,Cho, Heon-No 대한기계학회 2000 大韓機械學會論文集B Vol.24 No.4

The effect of nozzle diameter on the local Nusselt number distributions has been investigated for an axisymmetric turbulent jet impinging on the flat plate surface. The flow at the nozzle exit has a fully developed velocity profile. A uniform heat flux boundary condition at the plate surface was created using gold film Intrex. Liquid Crystal was used to measure the plate surface temperature. The experiments were made for the jet Reynolds number (Re) 23,000, the dimensionless nozzle to surface distance (L/d) from 2 to 14, and the nozzle diameter (d) from 1.36 to 3.40 cm. The results show that the Nusselt number at and near the stagnation point increase with an increasing value of the nozzle diameter.

무선 센서 네트워크에서 에너지 효율 향상을 위한 링크 비용 기반 라우팅 프로토콜

이대희,조경우,강철규,오창헌,Lee, Dae-hee,Cho, Kyoung-woo,Kang, Chul-gyu,Oh, Chang-heon 한국정보통신학회 2019 한국정보통신학회논문지 Vol.23 No.5

기존의 에너지 효율적인 라우팅 프로토콜은 라우팅 메트릭 중 에너지에 높은 가중치를 적용하여 에너지 효율이 높은 경로에 노드가 집중되고 해당 경로의 에너지가 빠르게 고갈되는 문제가 발생한다. 이러한 무선 센서 네트워크의 불균형적인 에너지 소모는 네트워크의 분할 및 기능 상실을 야기하여 네트워크 수명을 감소시킨다. 따라서 본 논문에서는 무선 센서 네트워크의 불균형적인 에너지 소모를 해결하기 위해 링크 비용 기반 라우팅 프로토콜을 제안한다. 제안하는 라우팅 프로토콜은 네트워크 문제 상황에 따라 라우팅 메트릭의 가중치를 차등 적용하여 링크 비용을 산출하고 가장 낮은 값을 갖는 경로를 선정한다. 성능 분석 결과, 제안하는 라우팅 프로토콜이 기존 AODV 프로토콜 보다 네트워크 수명이 22%, 에너지 소모 표준편차가 2%, 데이터 수신율이 2% 향상되었음을 확인하였다. Conventional energy efficient routing protocols apply high weight to energy among routing metrics, causing nodes to concentrate on energy efficient paths and quickly exhaust energy on those paths. The unbalanced energy consumption of these wireless sensor networks causes network division and malfunction, and reduces network lifetime. Therefore, in this paper, it proposes a link cost based routing protocol to solve the unbalanced energy consumption of wireless sensor networks. The proposed routing protocol calculates the link cost by applying the weight of the routing metric differently according to the network problem situation and selects the path with the lowest value. As a result of the performance analysis, it confirmed that the proposed routing protocol has 22% longer network life, 2% energy consumption standard deviation and 2% higher data reception rate than the existing AODV protocol.

터빈 블레이드 표면과 선형익렬에서의 열전달 및 유동측정 연구

이대희,심재경,박성봉,이재호,윤순현,Lee, Dae Hee,Sim, Jae Kyung,Park, Sung Bong,Lee, Jae Ho,Yoon, Soon Hyun 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.5

An experimental study has been conducted to investigate the effects of the free stream turbulence intensity and Reynolds number on the heat transfer and flow characteristics In the linear turbine cascade. Profiles of the time-averaged velocity, turbulence intensity, and Reynolds stress were measured in the turbine cascade passage. The static pressure and heat transfer distributions on the blade suction and pressure surfaces were also measured. The experiments were made for the Reynolds number based on the chord length, Rec = $2.2{\times}10^4$ to $1.1{\times}10^5$ and the free stream turbulence intensity, $FSTI_1$ = 0.6% to 9.1 %. The uniform heat flux boundary condition on the blade surface was created using the gold film Intrex and the surface temperature was measured by liquid crystal, while hot wire probes were used for the flow measurements. The results show that the free stream turbulence promotes the boundary layer development and delays the flow separation point on the suction surface. It was found that the boundary layer flows on the suction surface for all Reynolds numbers tested with $FSTI_1$ = 0.6% are laminar. It was also found that the heat transfer coefficient on the blade surface increases as the free stream turbulence intensity increases and the flow separation point moves downstream with an increasing Reynolds number. The results of skin friction coefficients are in good agreement with the heat transfer results in that for $FSTI_1{\geq}2.6%$, the turbulent boundary layer separation occurs.

다목적함수를 이용한 지능형 브레이커의 타격성능 최적화

이대희,노대경,박성수,이근호,강영기,조재상,장주섭,Lee, Dae-Hee,Noh, Dae-Kyung,Park, Sung-Su,Lee, Geun-Ho,Kang, Young-Ky,Cho, Jae-Sang,Jang, Joo-Sup 한국시뮬레이션학회 2017 한국시뮬레이션학회 논문지 Vol.26 No.4

This paper discusses the design parameter sensitivity analysis and multi-objective function optimization for improving the impact performance of an auto-sensing breaker based on the analytical model of the same, which secured reliability in a previous research. The study aims to improve both impact power and stability by complementing the existing research that only improved the impact power. The study sequence is as follows: first, the analysis scenarios for the accurate sensitivity analysis and optimization are set up. Second, the sensitivity of the design parameter of the auto-sensing breaker is analyzed, and the variables with high sensitivity are extracted. Third, the extracted variables are used to optimize the multi-objective functions, and the optimized performance is compared with the initial performance to see how the impact performance on the existing auto-sensing breaker has improved. This study is based on domestic technology, and will allow the development of products with a better blowing performance than their existing overseas counterparts. 본 논문에서는 선행연구에서 신뢰성을 확보한 지능형 브레이커의 해석모델을 바탕으로 지능형 브레이커의 타격성능 개선을 위한 설계변수 민감도 분석 및 다목적함수 최적화를 다룬다. 본 연구에서는 타격출력만을 향상시키는 기존의 연구를 보완하여 타격출력과 안정성 모두를 개선시키는 것을 목표로 한다. 연구를 진행하는 순서는 다음과 같다. 먼저 정확한 민감도 분석 및 최적화를 진행하기 위하여 해석 시나리오를 설정한다. 그 후 지능형 브레이커의 설계변수 민감도를 분석하고, 상위 민감도를 가지는 변수를 추출한다. 마지막으로 추출한 변수를 사용하여 다목적함수 최적화를 진행하고, 초기 성능과 최적화된 성능의 비교를 통해 기존 지능형브레이커에서 타격성능이 얼마나 향상되었는지 파악한다. 이러한 연구를 통해 국내 기술력으로 기존 해외 선진사의 제품보다 타격성능이 향상된 제품을 개발할 수 있는 가능성을 확보할 수 있다.