중동에서 수자원 이용을 위한 국제협력

김중관,심의섭 한국중동학회 1996 韓國 中東 學會 論叢 Vol.16 No.1

다물체 동역학 기반 곤충형 날갯짓 비행체의 가로 방향 제어 특성 분석

김중관,한재흥,한종섭,장조원 한국항공우주학회 2012 한국항공우주학회 학술발표회 논문집 Vol.2012 No.11

본 연구에서는 박각시나방(Hawkmoth, Manduca Sexta)의 실제 크기(at-scale) 다물체 동역학 모델을 수립하고, 이를 바탕으로 세 가지의 각 자유도(angular degrees of freedom)를 가지는 날갯짓 운동 함수 변화에 따른 가로 방향 비행 제어 특성을 살펴 보았다. 복잡한 날갯짓 운동에 의해서 발생하는 공력예측을 위하여 준정상 공력이론을 기본으로 하는 병진공력성분(translational force)에 대한 모델링이 이루어졌고, 비정상 공력 특성을 일부분 반영하기 위하여 회전공력성분(rotational force)에 대한 모델링도 이루어졌다. 다물체 동역학 해석 결과, yB 방향의 제어력 확보를 위해서는 양 날개의 deviation 평균각의 차이(△θ?), 롤(roll)방향의 제어력 확보를 위해서는 양 날개의 stroke position 각 진폭의 차이(△φamp), 요(yaw)방향의 제어력 확보를 위해서는 양 날개의 feathering 평균각의 차이(△α?)를 이용하는 것이 효과적임을 확인하였다. 이는 추후 곤충형 날갯짓 비행체의 안정적인 제어 기법 설계를 위해 효과적으로 사용될 수 있을 것이다. In this paper, a multibody dynamic model of at-scale Hawkmoth, Manduca Sexta is established. Based on this insect model, control characteristics of lateral flight dynamics with respect to the change of three angular degrees of freedom of wing kinematics is investigated. Aerodynamic forces from complex wing motions are estimated by a translational force model based on quasi-steady aerodynamics theory. An experiment-based rotational force model is also included for a partial inclusion of unsteady aerodynamics effects. Results show that mean deviation angle difference(△θ?) of each wing is needed for the control authority for yB direction; amplitude of stroke positional angle difference(△φamp) of each wing is needed for the control authority for roll direction; mean feathering angle difference(△α?) of each wing is needed for the control authority for yaw direction. These results could effectively help developing a stable flight control design of insect-inspired Flapping-Wing Micro-Air-Vehicles.

이라크 쿠르드(Iraq Kurd)지역의 진출 환경 분석: 수출, 건설, 관광, 석유산업을 중심으로

김중관 한국외국어대학교(글로벌캠퍼스) 중동연구소 2007 중동연구 Vol.26 No.1

An Analysis on the Market Environment ofExport, Construction, Tourism, and Oil Industryof Kurd RegionKIM, Jong-KwanThis paper focuses on the potentialities of economiccoperation betwen Korea nd Iraq under the presentfrustration of Iraqi central government o recover the mark etfunction, as wel as diferences over the quitable distrib utionof oil revenue among the local governments. Especialy thenational reconciliation weaken the situation of the countries.However, the potential of economic institutions in Krudish stateis on the critical juncture under the curent situation.The paper wil ead to an intensification of the progres tothe Kirkuk area that could be posibly the ventualestablishment of a de facto Kurdish state. The Kurdish politicalparties have huge leverage in the Iraq government. And Krudi shgovernment activates its trategic role to invite the forei gninvestment in the region under a consequence of regionaldevelopments and as a smal open economy.There are thre main industries to discus on thepotentialities of economic operation. They are oil.construction, tourism to review macro-economic developme ntswil be discused on some of related isues. This is to try toidentify those sectors and analyze how to progres Iraq mark etthat is curently being pursued by Erbil and Sulaymaniya이라크 쿠르드 지역의 진출 환경 분석(Iraq Kurd) : 수출 건설 관광 석유산업을 중심으로, 179regions wil be focused. This paper eviews the proces ofindustrial development of the Krudish region after invasion andinvestigated the peculiarity of energy resources and sek aeconomic operation with Korea positively in the near futu re.

An Analysis on the Statistical Properties between the Sukuk and non-Sukuk in Financial Market

김중관,김홍배,김분태 한국외국어대학교(글로벌캠퍼스) 중동연구소 2014 중동연구 Vol.32 No.3

Economic and financial time series sometimes exhibittrending behavior or non-stationary stochastic processin themean. An important econometric task is determining the mostappropriate form of the trend and analyzing the stationary andlong memory in the data. This study investigated the statisticaldifference between the yield of Sukuk issued on Sharia andthat of commercial bank bond in financial market. We found serial correlation in the residuals of the yield ofSukuk and PBMK bond because shock and innovation has longrange dependence on time. We found that the series of Sukukyield issued on Sharia principle are stationary, but the levelseries of commercial bank bond yield are non-stationary, theyield of commercial bank is determined by market participants. In particular the commercial bank yield displays strong volatilityclustering features. Once volatility has entered the market it isquite persistent. Persistence of shocks was infinite for nonstationaryseries. The impact of any past shock on price seriesdoes not decay over time and has strong memory. Next, weconclude that there is no evidence of a cointegrationrelationship between the Bank bond and GII yield series. Inother words, we find no arbitrage opportunity as Sukuk– bondbasis arbitrage, because there is no long-run relationshipbetween the yields of commercial non-Sukuk bond and theSukuk. Malaysia government and Bank Negara (central bank) hasregulated Sukuk GII and MITB were issued to allow Islamicbanks to hold liquid papers that meet their statutory andregulatory liquidity requirements based on Shariah principles asthey are prohibited to purchase or trade in MGS, MTB or other interest-bearing credit bonds using Sukuk.

곤충형 날갯짓 비행체의 6자유도 비행 시뮬레이션을 위한 공력 예측 해석

김중관,한종섭,장조원,한재흥 한국항공우주학회 2011 한국항공우주학회 학술발표회 논문집 Vol.2011 No.11

This paper investigates a comparative study of unsteady aerodynamics measurement of Hawkmoth, Manduca Sexta wing and its quasi-steady aerodynamics estimation. Two flight regime: 1) Re=7500: real Hawkmoth's hovering regime, 2) Re=20000: normal micro air vehicles' (MAVs) operating regime, are tested in a water chamber with a scaled Hawkmoth wing model. For the quasi-steady estimation, a translational force component is modeled from lift and drag coefficient curves measured from a steady aerodynamics measurement of Re=8071. In addition, rotational force component is also modeled in the quasi-steady aerodynamic model for this comparative study. Results showed that the flapping cycle-averaged mean aerodynamic coefficients are well matched. In terms of time-varying sense, maximum aerodynamic peaks are well captured with quasi steady estimation, and peaks generated from rotational force components are also captured. However, peaks from wake-capture could not be properly estimated. This study provides a feasibility of applying reduced order aerodynamic model to a multibody dynamics based 6DOF flight simulation environment for insect-inspired flapping wing MAVs. 본 연구에서는 박각시나방(Hawkmoth, Manduca Sexta) 날개 상사모델의 비정상 공력 측정 실험과 준정상 공력 모델을 사용한 다물체 동역학 기반의 공력 예측 시뮬레이션의 비교 해석을 수행하였다. 실제 박각시나방의 제자리비행 조건과 유사한 Re=7500 및 일반적인 초소형비행체의 비행 조건인 Re=20000 두 가지 영역에 대하여 비정상 공력 발생 상사 수조 실험이 수행되었다. 공력 예측 시뮬레이션에 사용된 준정상 공력 모델은 Re=8071 의 정상 상태 공력 측정 실험으로부터 얻어진 양력계수 및 항력계수 커브를 통하여 병진공력성분(translational force)을 모델링 했으며, 추가적으로 회전공력성분(rotational force)에 대한 모델링도 이루어졌다. 비교 결과, 양력계수 및 항력계수의 날갯짓 1 주기 평균값을 잘 예측했으며, 날갯짓 한 주기 동안 변화하는 공력 특성 결과에서도 최대 공력 피크 및 회전공력성분에 의한 피크를 예측함을 확인했다. 하지만, 실험 결과에서 발생한 후류포획(wakecapture)에 의한 피크는 예측하지 못하였다. 본 연구를 통하여 곤충형 날갯짓 비행체의 비행동역학 및 비행안정성 연구에 적용 가능한 저차 공력 모델의 공력 예측 능력을 확인할 수 있었다. 이 결과는 추후 다물체 동역학 기반 6 자유도 비행 시뮬레이션 환경 개발에 활용될 것이다.

한국사회에서의 다문화 수용을 위한 비전과 전략

김중관,정창근,양경수 동국대 SSK 글로벌 다문화 연구센터 2011 글로벌다문화연구 Vol.1 No.-

국제결혼 이주여성의 문화적응과 건강관련 스트레스의 비교분석

김중관,윤희중 한국중동학회 2012 한국중동학회 학술대회 자료집 Vol.2012 No.-

Control Effectiveness Analysis of the hawkmoth Manduca sexta: a Multibody Dynamics Approach

김중관,한재흥 한국항공우주학회 2013 International Journal of Aeronautical and Space Sc Vol.14 No.2

This paper presents a control effectiveness analysis of the hawkmoth Manduca sexta. A multibody dynamic model of the insect that considers the time-varying inertia of two flapping wings is established, based on measurement data from the real hawkmoth. A six-degree-of-freedom (6-DOF) multibody flight dynamics simulation environment is used to analyze the effectiveness of the control variables defined in a wing kinematics function. The aerodynamics from complex wing flapping motions is estimated by a blade element approach, including translational and rotational force coefficients derived from relevant experimental studies. Control characteristics of flight dynamics with respect to the changes of three angular degrees of freedom (stroke positional, feathering, and deviation angle) of the wing kinematics are investigated. Results show that the symmetric (asymmetric) wing kinematics change of each wing only affects the longitudinal (lateral) flight forces and moments,which implies that the longitudinal and lateral flight controls are decoupled. However, there are coupling effects within each plane of motion. In the longitudinal plane, pitch and forward/backward motion controls are coupled; in the lateral plane, roll and side-translation motion controls are coupled.

The Maintenance of Incorporeal Cultural Inheritance of ‘Корё сарам’ : Focusing on Language and Name

김중관 한국글로벌문화학회 2016 글로벌문화연구 Vol.7 No.2

There are approximately 500,000 ethnic Koreans reside in the CIS region, primarily in now-independent states of Central Asia. Large Korean communities scatter around Volgograd of southern Russia, the Caucasus, and southern Ukraine through out the former Soviet Union. These communities can be traced back to the Koreans where their ancestor was living in the Russian Far Eastern place during the late 19th century. The Soviet policy of indianization resulted in the creation of 105 soviet Korean village in mixed-nationality community, as well as an entire Korean nationality, the Pro-soviet Korean National circle; these steered their activities entirely in the Korean language system. In 1989 the number of native Russian speakers among Koryo-saram people overtook that of native Korean speakers. However, they tried to maintain their cultural inheritance through establishing school in the deported place. Until then, it was the language of Hangul which is considered to ban the Korean language. Learning Russian was considered to be the only way from the poverty, and for tumultuous years was to survive in the midst of the Russian language which was forced in the community. Therefore, the Korean language slowly started to disappear in the Soviet society.

복합운송인의 책임한계에 대한 형태별 분류와 실무상 적용

김중관 한국무역상무학회 2000 貿易商務硏究 Vol.13 No.-