• 한국정보시스템학회지:정보시스템연구
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• 제33권2호
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• pp.47-80
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• 2024

Purpose With the rapid evolution of the OTT platform, this study addresses a notable gap in the existing literature by examining the impact of celebrity involvement in OTT contents on the intention to visit the country. We explore the intricate mechanisms through which the audience's sense of telepresence, facilitated by OTT technology, and parasocial relationships with celebirities contribute to the formation of the national image and, consequently, influence the intention to visit the country. Design/methodology/approach This study applied Partial Least Square Structural Equation Modeling (PLS-SEM) using survey data from 222 participants. Findings Our findings reveal a positive effect of celebrity involvement on both telepresence and parasocial relationship. Additionally, we observe a positive relationship between telepresence and parasocial relationship. The study further highlights the impact of these factors on the cognitive and affective national images. The cognitive and affective national images, in turn, positively influence the overall national image, ultimately impacting the intention to visit the country. This research contributes to the understanding of the interplay between psychological factors related to viewer-celebrity relationships and the technical characteristics of OTT contents in shaping national images and travel intentions.

• Korean Journal of Acupuncture
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• 제25권2호
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• pp.179-197
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• 2008

Objectives and Methods : The purpose of this study was to observe the effects of acupuncture and electro-acupuncture (EA) at PC6 on intestinal motility in rats. We made over-activated state of intestinal motility with carbachol and suppressed state of intestinal motility with loperamide in rat, and carried out acupuncture with needle retained (NR), low frequency (2 Hz) EA and high frequency (100 Hz) EA at PC6 before or after the administration of carbachol or loperamide. The charcoal travel rate was measured to evaluate the intestinal motility. Results : 1. NR showed no significant influences on intestinal motility of rat in normal state. While, 2 Hz EA and 100 Hz EA at PC6 significantly increased the intestinal motility of rat in normal state. 2. All of the pre-treatment and post-treatment of NR, 2 Hz EA and 100 Hz EA at PC6 showed no significant effects on intestinal motility of rat which was over-activated with carbachol. 3. Both pre-treatment and post-treatment of NR significantly increased intestinal motility in rat which was suppressed with loperamide. 4. Pre-treatment of 2 Hz EA and post-treatment of 100 Hz EA significantly increased intestinal motility in rat which was suppressed with loperamide. Conclusions : These results suggest that acupuncture (NR) and EA on PC6 have preventive and therapeutic effect on suppressed intestinal motility, and NR may be more effective than EA in that condition.

• 대한교통학회지
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• 제19권2호
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• pp.7-19
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• 2001

항공이용자가 항공사를 선택하는데 있어서 대형 항공사고가 발생하기 이전에는 간과하였던 "항공안전"이라는 변수가 항공사고 이후에 항공사 선택에 보다 중요한 영향을 미쳤다는 것이다. 따라서 항공이용자가 고려하는 선택기준이 과거에 비해 상당히 변화하였다고 판단되며 이러한 항공이용자의 행동변화 연구를 위해 실제로 김포국제공항의 국제선, 국내선 여객터미널을 이용하는 내·외국인을 대상으로 설문조사를 통해 실증분석을 하였다. 본 연구는 정부의 항공안전에 대한 근본적인 정책수립과 항공안전정책에 기초한 항공사의 제도적 장치 마련 등 항공사가 일으키는 항공사고를 감소시키는 노력의 일환으로 국적항공사가 대외경쟁력을 강화시키는데 일조 할 수 있을 것으로 사료된다.

• Advances in aircraft and spacecraft science
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• 제2권1호
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• pp.95-108
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• 2015

Automatic Dependent Surveillance Broadcast (ADS-B) is quickly being adopted by aviation safety authorities around the world as the standard for aircraft tracking. The technology provides the opportunity for live tracking of aircraft positions within range of an ADS-B receiver stations. Currently these receiver stations are bound by land and local infrastructural constraints. As such there is little to no coverage over oceans and poles, over which many commercial flights routinely travel. A low cost space based ADS-B receiving system is proposed as a constellation of small satellites. The possibility for a link between aircraft and satellite is dependent primarily on proximity. Calculating the likelihood of a link between two moving targets when considering with the non-periodic and non-uniform nature of actual aircraft flight-paths is non-trivial. This analysis of the link likelihood and the performance of the tracking ability of the satellite constellation has been carried out by a direct simulation of satellites and aircraft. Parameters defining the constellation (satellite numbers, orbit size and shape, orbit configuration) were varied between reasonable limits. The recent MH370 disappearance was simulated and potential tracking and coverage was analysed using an example constellation. The trend of more satellites at a higher altitude inclined at 60 degrees was found to be the optimal solution.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2005년도 후기학술대회논문집
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• pp.156-157
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• 2005

Gas hydrate is ice-like crystalline lattice, formed at appropriate temperature and pressure, in which gas molecules are trapped. It is worldwide popular interesting subject as a potential energy. In korea, a seismic survey for gas hydrate have performed over the East sea by the KIGAM since 1997. In this paper, we had conducted numerical and physical modeling experiments for seismic properties on gas hydrate with field data which had been acquired over the East sea in 1998. We used a finite difference seismic method with staggered grid for 2-D elastic wave equation to generate synthetic seismograms from multi-channel surface seismic survey, OBC(Ocean Bottom Cable) and VSP(Vertical Seismic Profiling). We developed the seismic physical modeling system which is simulated in the deep sea conditions and acquired the physical model data to the various source-receiver geometry. We carried out seismic complex analysis with the obtained data. In numerical and physical modeling data, we observed the phase reversal phenomenon of reflection wave at interface between the gas hydrate and free gas. In seismic physical modeling, seismic properties of the modeling material agree with the seismic velocity estimated from the travel time of reflection events. We could easily find out AVO(Amplitude Versus Offset) in the reflection strength profile through seismic complex analysis.

• KIEAE Journal
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• 제13권2호
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• pp.67-76
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• 2013

The purpose of this study is to analyze the accessibility to the place for outdoor exercise. For that, the departure (resident) location of the users of outdoor exercise equipment within 12 parks in Seoul have been investigated. A total of 1,733 people have been surveyed during the two-week period between Aug.2 and Aug. 15 and 815 cases were analyzed. We also investigated demographic characteristics, access method and related factors such as location, climate and visiting time. The results were coded through ArcGis program and the accessibility to each exercise location, difference in regional accessibility and accessibility characteristics in terms of climate and time have been analyzed. The results are as follows: First, visitors to the Han River start from the places further than the visitors to the streamlines. Second, the average moving distance is longer for the users aged under-60 than for the users aged 60 and over to reach the exercise place. And the average moving distance for visitors to the Han River destination is the longest with 748 meters, followed by 203 meters for general parks and 92 meters for streamline parks, respectively. Third, in each non-waterfront parks, the moving distance by users under-60 was longer by about 230 meters than that by users 60 and over. Fourth, exercisers in the weekend travel more by 244 meters than those during the midweek users to reach the exercise place. Fifth, the number of visitors to the Han River increased in the weekend while visitors to the streamlines decreased in the same period. Sixth, the traveling length for bicycle users is three times as much as that for pedestrian visitors. And the departure locations of bicycle users were more widely distributed.

• Journal of Acupuncture Research
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• 제25권4호
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• pp.59-69
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• 2008

Objectives : The purpose of this study was to observe the effects of acupuncture and electro-acupuncture(EA) at $LI_{11}$ on intestinal motility in rats. Methods : We made over-activated and suppressed state of intestinal motility with carbachol and loperamide in rat and carried out acupuncture with needle retained(NR), low frequency(2 Hz) EA and high frequency(100Hz) EA at $LI_{11}$ before or after the administration of carbachol or loperamide. The charcoal travel rate was measured to evaluate the intestinal motility. Results : 1. NR, 2Hz EA and 100Hz EA at $LI_{11}$ showed no significant influences on intestinal motility of rat in normal state. 2. All of the pre-treatment and post-treatment of NR, 2Hz EA and 100Hz EA at $LI_{11}$ showed no significant effects than control group on intestinal motility of rat which was over-activated with carbachol. 3. The pre-treatment of 2Hz EA and 100Hz EA at $LI_{11}$ on intestinal motility of rat which was suppressed with loperamide showed no significant influences but in the L-$LI_{11}$-EA(L) and L-$LI_{11}$-EA(H) groups, intestinal motility was significantly increased than L-control group. Conclusions : These results suggest that acupuncture and EA on $LI_{11}$ have preventive effect and therapeutic effect on suppressed intestinal motility, and EA is more effective than NR.

• Journal of Acupuncture Research
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• 제25권4호
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• pp.11-29
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• 2008

Objectives : The purpose of this study was to observe the effects of acupuncture and electro-acupuncture at $LI_4$ on intestinal motility in rat. Methods : We made over-activated state of intestinal motility with carbachol and suppressed state of intestinal motility with loperamide in rat and carried out needle retention acupuncture, low frequency electro-acupuncture and high frequency electro-acupuncture at $LI_4$ or sham point in rat devided into pre-treatment group and post-treatment group. and we resulted as follow for measuring charcoal travel rate to observe intestinal motility. Results : 1. Any of needle retention acupuncture, low frequency electro-acupuncture and high frequency electro-acupuncture at $LI_4$ have no significant influences on intestinal motility of rat in normal state. 2. All of the pre-treatment and post-treatment of needle retention acupuncture, low frequency electro-acupuncture and high frequency electro-acupuncture didn't significantly decrease intestinal motility in rat which over-activated with carbachol. 3. Pre-treatment of needle retention acupuncture and high frequency electro-acupuncture significantly increased intestinal motility in rat which suppressed with loperamide. 4. Post-treatment of needle retention acupuncture, low frequency electro-acupuncture and high frequency electro-acupuncture significantly increased intestinal motility in rat which suppressed with loperamide. Conclusions : These results suggest that acupuncture on $LI_4$ have preventive effect and therapeutic effect on suppressed intestinal motility, and especially high frequency electro-acupuncture is more effective.

• 대한토목학회논문집
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• 제35권4호
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• pp.875-886
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• 2015

본 연구는 남북한간 교류협력 증진과 국제협력사업 활성화에 따라 향후 동북아 차원에서 연계가 예상되는 아시안하이웨이 6번노선(간성-선봉)의 이용을 가정하고, 현존하지 않는 북한 육로망 연계에 따른 한반도 주변의 국제여객수송 행태 변화를 분석하였다. 이를 위해 SP(Stated Preference), RP(Revealed Preference) 자료를 기반으로 다항로짓(ML)과 네스티드로짓(NL) 모형을 구축하였다. NL모형을 통해 분석한 결과, 현재 한중(동북부), 한러(극동러시아)간 국제여객수송 대부분이 육상로 단절로 인해 항공을 통해 이루어지나, AH6노선이 구축될 경우에는 약 90%이상이 육상운송으로 전환될 것으로 분석되었다. 또한, 여객수송거리가 길어질수록(903~1,631km) 국제철도의 수단분담률은 62.8%에서 66.1%로 증가하고, 이 때 도로수송은 29.6%에서 21.9%로 감소하는 것으로 나타났다. 반면, 항공수송은 육상수송과는 달리 수송 거리대별 증감경향이 뚜렷하게 나타나지 않고, 약 10% 수준의 수단분담률을 나타내는 것으로 추정되었다.

• 한국정보전자통신기술학회논문지
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• 제9권6호
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• pp.559-565
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• 2016

본 교차로에 각 방향별 이동류의 상충해소를 위한 목적으로 도입된 교통신호제어는 차량증가에 따라 여러 교차로를 연계하여 정지와 지체시간을 최소화하는 간선도로 제어 목적으로 바뀌었고 이를 위해 교통신호운영 효율화를 위한 다양한 방법이 제시되고 있다. 본 연구는 도심 가로축 연동체계를 교통운영체계 선진화 방안에서 제시하고 있는 비보호좌회전확대로 운영되는 선직진 후좌회전 체계와 기존 실시간 대응제어 신호운영체계를 비교 분석하였으며, 비교 분석을 위해 4개시 5개 지역을 선정 평균 교차로 간격, 연동 가로축 거리 등을 구분하였다. 그 결과 교통운영체계 선진화 방안 신호운영체계의 교통처리용량은 실시간 대응제어 신호운영체계의 교통처리용량 보다 주기 160초 때 차로 당 286대, 140초 경우 308대, 120초 경우 264대가 증가하여 1차로 도로확장을 한 만큼의 효과가 있는 것으로 나타났다. 또한 가로축 연동에 대해서도 가로축 길이 2.0~3.0km, 2.0km미만에서 분석 주기(160초, 140초, 120초) 모두에서 연동밴드 폭이나 정지횟수에서 효과가 있는 것으로 나타났다.