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김천중,김용관 관광경영학회 1999 관광경영연구 Vol.5 No.-
Information technology and tourism seem to be very unlikely parterners. In so far as the technologies are concerned, it is not telephone or computers or videotext that are being diffused, but a whole system of information technologies. Indeed information and the technologies for their manipulation, are vital cement of the tourist trade. The objective of this study is to aggregate and analyze the development and theoretical constructs which could offer a more profound understanding of the diffusion and impact of information technology in the tourism marketing strategies. Such an approach could help to alleviate some commonly-held misconceptions about information technology and tourism industry.
전달정렬 함상 발사 고속 유도무기의 보정필터 설계에 대한 연구
김천중(Cheon-Joong Kim),이인섭(In-Seop Lee),오주현(Ju-Hyun Oh),유해성(Hae-Sung Yu),박흥원(Heung-Won Park) 대한전기학회 2019 전기학회논문지 Vol.68 No.1
This paper presents the study results on the design of the correction filter to improve the azimuth error estimation of the high-speed guided missile launched from the warship after the transfer alignment. We theoretically proved that the transfer alignment performance is determined by the accuracy of the marine inertial navigation system and the observability of the attitude error state variable in the transfer alignment filter, and that most of navigation errors in high-speed guided missile are caused by azimuth error. In order to improve the azimuth estimation performance of the correction filter, the multiple adaptive estimation method and the adaptive filters adapting the measurement noise covariance or the process noise covariance are proposed. The azimuth estimation performance of the proposed adaptive filter and the existing Kalman filter are compared and analyzed each other for 8 different transfer alignment accuracy cases. As a result of comparison and analysis, it was confirmed that the adaptive filter adapting the process noise covariance has the best azimuth estimation performance. These results can be applied to the design of correction filters for high-speed guided missile.
레이저 관성항법장치에서 링레이저 자이로 디더 운동에 의한 가속도계 공진이 자체 정렬/항법 성능에 미치는 영향 분석
김천중,임경아,김선아 한국군사과학기술학회 2021 한국군사과학기술학회지 Vol.24 No.6
In this paper, we theoretically analyzed the self-alignment/navigation performance in the accelerometer resonance state generated by dither motion of ring laser gyroscope in LINS and verified it through simulation. As a result of analysis, it is confirmed that the amplitude of the accelerometer measurement amplified in the accelerometer resonance state is decreased in the process of sampling per the navigation calculation period and that frequency is changed by the aliasing effect too. It was also analysed that the attitude error in self-alignment is determined by the amplitude/frequency of the accelerometer measurement, the gain of the self-alignment loop, and the velocity and position error in the navigation is determined by the amplitude/frequency/phase error of the accelerometer measurement. This analysis and simulation results show that the self-alignment and navigation performance is not be degraded only when the amplification factor of the accelerometer measurement in the accelerometer resonance state is 3 or less
대나무 추출액과 죽력의 혼합물이 국소 뇌혈류량 및 평균 혈압에 미치는 영향
김천중,장경선,조수인,김계엽,정현우,Kim, Cheon-Joong,Jang, Kyeong-Seon,Cho, Su-In,Kim, Gye-Yeop,Jeong, Hyun-Woo 대한동의생리학회 2006 동의생리병리학회지 Vol.20 No.6
This Study was designed to investigate the effects of Mixture of Bambusae Caulis in Liquamen and Bamboo Extract on the change of regional cerebral blood flow (rCBF) and mean arterial blood pressure (MABP) in normal and cerebral ischemic rats. Experimental materials were as follows ; BE- 1 was Bamboo Extract (BE) extracted with 70% ethyl alcohol, BE-11 was BE extracted with distilled water at $121^{\circ}C$ for 30 min, BE-111 was BE extracted with distilled water at $121^{\circ}C$ for 3 hrs, MLC was mixture of Bambusae Caulis in Liquamen (BCL) and BE-111 mixed at the ratio of 1 to 100 (MLC100), 1 to 50 (MLC50), 1 to 20 (MLC20), 1 to 10 (MLC10), 1 to 5 (MLC5). The results were as follows , The Changes of BE- 1 on the rCBF and MABP in normal rats were not showed, BE- 11 significantly decreased rCBF in a dose-dependent manner Dut increased MABP in a dose-dependent manner. BE-111 increased rCBF in a dose-dependent manner, MLC significantly increased rCBF in a dose-dependent manner and increased MABP in a dose-dependent manner. rCBF was significantly and stably increased by MLC5 (1 mg/kg, i.p.) during the period of cerebral reperfusion, which contrasted with the findings of rapid and marked increase in control group. As results above ; The present author thought that BE- 111 and MLC increased rCBF by dilating pial arterial diameter.
관광정보기술 적용에 관한 연구 : 호텔정보시스템을 중심으로
김천중,김권수 관광경영학회 2000 관광경영연구 Vol.7 No.-
In this article, I have a purpose to research the applied condition of hotel information system in Korea to see how IT(Information Technology) which is required to process tourism information precisely and efficiently is applied to tourism industry and then suggest the direction of development of hotel information system application. The survey was practiced on 13 first class hotel in Seoul, Korea, from September 27 to October 7 by mainly fax and telephone. As a result of this research, I think that the hotels in Korea still have many things to do, applying information technology. Especially IT should be applied for the work connection among departments in front office and in back office as well as between front office and back office to achieve an entire harmony.
김천중(Kim Chun Joong) 한국외식경영학회 2004 외식경영연구 Vol.7 No.3
최근의 한국의 관광산업은 새로운 발전을 위한 선진형 관광사업의 발전기로 전환하여야할 기회를 갈망하고 있다. 이러한 목적을 달성하기 위해서는 기존의 관광산업의 체질개선과 함께 새로운 선도기업의 실험이 하나의 대안이 될 수 있을 것이다. 이러한 측면에서 크루즈사업의 발전은 한국 관광산업의 새로운 발전을 위한 선도 기업으로서의 역할을 기대할 수가 있을 것이다. 크루즈사업의 발전은 세계경제의 영향, 세계 관광객의 여행패턴의 변화, 해당 관련국각의 정부의 정책, 기업의 역할 등의 외부적 영향요인과 함께 크루즈선사의 이미지, 크루즈선의 시설등과 함께 내부적 핵심요소로서 식음료 서비스의 수준과 입, 출항 터미널의 수준과 서비스, 상륙여행을 위한 다양하고 경쟁성 있는 상품의 개발로 그 목적을 달성할 수가 있을 것이다. 본 논문에서는 본격적인 크루즈여행의 발전을 모색하기 위한 목적으로 이러한 영향요인들에 대한 크루즈여행자들의 선택행동을 분석하여, 향후 한국의 크루즈 관련 관광사업체들이 경영지표로 활용하기 위한 관점에서 분석을 시도하였다. 본 연구의 목적은 크루즈여행객들의 크루즈여행 목적지나 크루즈선사를 선택하는 행동에 있어서 선택행동에 대한 태도의 주관적 규범을 측정하고자 하였다. 이러한 분석은 호텔 등 여러 관광사업 분야에서 유사한 모습을 보이고 있으나 크루즈 분야에서도 적용이 되는지를 실험해 보고자 하는 것이다.
관성항법장치 위치 측위 기법 및 측위 위치정보 이용 칼만 필터 기반 자체정렬 성능 분석
김천중,이인섭,오주현,유해성,박흥원 제어·로봇·시스템학회 2020 제어·로봇·시스템학회 논문지 Vol.26 No.8
This paper presents indirect and direct positioning methods that acquire the initial position information necessary for self-alignment using an INS (Inertial Navigation System) in an environment where positioning information is not available and external interfacing to the INS is not possible. The performance analysis results of the self-alignment based on Kalman filter using the positioning information obtained by the proposed methods are also presented. The proposed positioning methods and self-aligned performance analysis results are verified through simulation and test. The verification confirms that the direct positioning method has excellent accuracy while undergoing external angular motion, and that the alignment performance is not significantly reduced, even when the positioning information is used for self-alignment. Therefore, if the INS is operated using the method presented in this paper, we expect that the operability of the vehicles equipped with the INS will be greatly improved. .