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정현모,이홍석,장동원,이민수,Jung, Hyun-Mo,Lee, Hong-Seock,Chang, Dong-Won,Lee, Min-Soo 대한생물정신의학회 1997 생물정신의학 Vol.4 No.2
The authors attempted to examine the allelic association between the A1 allele of Dopamine $D_2$ receptor and schizophrenia, alcoholism, drug addiction in Koreans. Schizophrenic patients(n=31), alcoholism(n=65), drug addiction(n=18) and controls(n=52) were examined by case-control study for distribution of the TaqI polymorphism of the dopamine $D_2$ receptor gene in Korean population to minimize the effect of racial differencies in gene frequencies. In schizophrenics, the numbers of schizophrenics with A1A1, A1A2, A2A2 were 9(29.0%), 15(48.4%) and 7(22.6%) respectively and in alcoholics with A1A1, A1A2, A2A2 were 14(21.5%), 36(55.4%) and 15(23.1%) respectively and in drug addiction with A1A1, A1A2, A2A2 were 2(11.1%), 10(55.6%) and 6(33.3%) respectively and in controls with A1A1, A1A2, A2A2 were 4(7.6%), 24(46.2%) and 24(46.2%) respectively. The prevalence of the A1 allele in schizophrenics, alcoholics, drug addiction and controls were 77%, 76.9%, 67% and 53.8% respectively. And the frequency of the A1 allele in schizophrenics, alcoholics, drug addiction and controls were 0.53, 0.49 0.39 and 0.31 respectively. There was significant difference in the frequency of the A1 allele between schizophrenics, alcoholics and controls. We also classified our alcoholic population. For classification by severity, we used the median MAST score 30 in our samples. There was also significant difference in the frequency of the A1 allele between less severe group(0.42) and more severe group(0.57). This data suggest that the A1 allele is associated with schizophrenia and alcoholism in Koreans. Furthermore the prevalence of the A1 allele increassed in more severely affected alcoholics. The authors conclude that our data support an allelic association between the A1 allele at dopamine $D_2$ receptor and schizophrenia, alcoholism. These results suggest the A1 allele of the $DRD_2$ gene is associated with a number of behavior disorders in which it may act as a modifying gene rather than as the primary etiological agent.
복수구조 전개 및 발사체 분리직후 시스템 자동운용을 위한 큐브위성의 메커니즘 설계
이명재,정현모,오현웅,Lee, Myoung-Jae,Jung, Hyun-Mo,Oh, Hyun-Ung 항공우주시스템공학회 2013 항공우주시스템공학회지 Vol.7 No.3
In case of cube satellite, it is difficult to realize the same performance as commercial satellite due to its highly restricted unit accommodation space. To maximize the performance of the cube satellite, design concept considering the multi-function of satellite is required. In this paper, mechanism design of cube satellite which is applicable for the holding and release of multi-deployable structures has been proposed and investigated. In addition, a switch mechanism design for the autonomous system operation just after the cube satellite separation from P-POD has also been proposed. The effectiveness of the mechanism design for holding and release of multi-deployable structures has been demonstrated by EM test of the holding and release mechanism.
영구자석 안정화 자세제어 방식이 적용된 큐브위성의 열적 특성분석
강수진,정현모,오현웅,Kang, Soo-JIn,Jung, Hyun-Mo,Oh, Hyun-Ung 항공우주시스템공학회 2013 항공우주시스템공학회지 Vol.7 No.3
Passive attitude stabilization method has been widely usde for attitude determination and control of cube satellite due to its advantage of system simplicity. The permanent magnet installed on the cube satellite passively controls the attitude of the satellite such that the satellite is aligned with the earth magnetic field. In this paper, on-orbit thermal behavior of the cube satellite with the permanent magnet attitude stabilization method has been investigated through on-orbit thermal analysis. THe orbit profile obtained from the aforementioned attitude control method has been reflected in the analysis. The analysis results indicate that the thermal design proposed in this study is effective for satisfying the temperature requirements of the commericial mission equipments.
큐브위성용 상용 전력계 부품을 적용한 영구자석 자세제어 안정화 방식 큐브위성의 전력계 개념설계
박태용,채봉건,정현모,오현웅,Park, Tae-Yong,Chae, Bong-Geon,Jung, Hyon-Mo,Oh, Hyun-Ung 항공우주시스템공학회 2014 항공우주시스템공학회지 Vol.8 No.1
The role of Electrical Power Subsystem (EPS) is to generate a power and distribute it to the electrical devices for the system operation. For on-orbit operation of cube satellite, it is also necessary to supply power to on-board mission devices as commercial satellite does. Recently, commercial EPS products dedicated for the cube satellite application has been developed and widely used for the power subsystem design. In this paper, a permanent magnet attitude stabilization method without external power has been introduced because it has advantage from power consumption point of view and the EPS design of cube satellite by applying the commercial EPS products has been introduced and investigated. This paper also deals with the specification of the commercial EPS products for the beginner of the cube satellite design.
큐브위성 STEP Cube Lab. 비행 모델의 열진공시험을 통한 성능 및 열제어계 설계 검증
강수진(Soo-Jin Kang),정현모(Hyun-Mo Jung),서정기(Joung-Ki Seo),오현웅(Hyun-Ung Oh) 한국항공우주학회 2015 韓國航空宇宙學會誌 Vol.43 No.9
극초소형 위성으로 분류되는 큐브위성 STEP Cube Lab.(Cube Laboratory for Space Technology Experimental Project)은 우주기반 핵심기술들의 궤도검증을 주 임무로 2015년 발사를 위해 최종 비행모델의 개발을 완료하였다. 상기 임무를 위해 STEP Cube Lab.은 수동 열제어를 기반으로 최적화된 열제어 설계를 수행하였으며, 수락(acceptance) 수준의 열진공시험을 통해 위성 성능 및 열제어 설계의 검증을 완료하였다. 또한 열평형 시험을 통해 위성 열-수치 모델의 신뢰도 향상을 위한 보정 작업을 수행하였다. 본 논문에서는 STEP Cube Lab. FM의 열진공시험을 통한 일련의 검증 과정에 대해 서술하고자 한다. The STEP Cube Lab. classified as a pico-class satellite has been successfully developed as a flight model(FM) to be launched in 2015. Its mission objective is to perform the on-orbit verification of fundamental space core-technologies. In this study, a thermal design concept based on the passive method to achieve the mission objective is introduced. The effectiveness of the thermal design and performance of the satellite has been verified through the acceptance level thermal vacuum test. In addition, to improve the reliability of thermal mathematical model, correlation was performed using the results of thermal balance test. This paper describes a series of process for the thermal vacuum test on the STEP Cube Lab. FM.
우주기반기술 검증용 극초소형 위성 STEP Cube Lab.의 시스템 개념설계
권성철(Sung-Cheol Kwon),정현모(Hyun-Mo Jung),하헌우(Heon-Woo Ha),한성현(Sung-Hyun Han),이명재(Myung-Jae Lee),전수현(Su-Hyeon Jeon),박태용(Tae-Young Park),강수진(Su-Jin Kang),채봉건(Bong-Gun Chae),장수은(Su-Eun Jang),오현웅(Hyun-Ung O 한국항공우주학회 2014 韓國航空宇宙學會誌 Vol.42 No.5
본 논문에서 제안한 우주기반기술 검증용 극초소형 위성의 명칭은 STEP Cube Lab. (Cube Laboratory for Space Technology Experimental Project)이며, 주요임무는 가변 방사율 열제어기, 형상기억합금 진동 절연기, 진동형 히트파이프, MEMS 기반 고체 추력기와 같이 국내 산학연에서 기 수행된 우주핵심기술을 발굴 및 탑재하여 궤도검증을 실시하는 것이다. 또한, 배열형 집광렌즈가 적용된 고효율 집광형 태양전력시스템과 열선절단방식이 적용되어 높은 체결력과 적용방법에 따라 복수구조물의 구속 및 분리가 가능한 무충격 구속분리장치를 주요 탑재체로 개발하여 궤도 검증을 실시예정이다. 본 논문에서는 상기 탑재체의 궤도 검증을 임무목적으로 하는 STEP Cube Lab.의 체계 및 부체계 개념설계를 통해 임무의 구현 가능성을 검토하였다. The mission objective of STEP Cube Lab. (Cube Laboratory for Space Technology Experimental Project) classified as a pico-class satellite is to verify the technical effectiveness of payloads such as variable emittance radiator, SMA washer, oscillating heat pipe and MEMS based solid propellant thruster researched at domestic universities. In addition, the MEMS concentrating photovoltaic power system and the non-explosive holding and separation mechanism with the advantages of high constraint force and low shock level will be developed as the primary payloads for on-orbit verification. In this study, the feasibility of the mission actualization has been confirmed by the preliminary system design.