• 대한산업공학회지
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• 제32권3호
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• pp.180-190
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• 2006

We evaluate the economic value and the optimal investment timing of IMT-2000 in Korea, in the perspective of a service provider who owns the business license for IMT-2000, by using the real options analysis. The result clearly shows the project value with options is positive and delaying the investment is more favorable to the provider. Binomial lattice approach, in which we try to describe American call option and sequential compound option, and sensitivity analysis present the optimal decisions according to future states and enable the management to make decision strategically and proactively.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2007년도 한국컴퓨터종합학술대회논문집 Vol.34 No.1 (C)
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• pp.407-411
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• 2007

이 논문은 우리나라 차량 영상에서 번호판 영역을 추출하는 알고리즘을 제안한다. 우리나라 번호판은 하단에 네개의 숫자를 포함하고 있으므로, 네 개의 숫자를 찾으면 번호판을 추출 할 수 있다. 제안하는 방법은 입력된 영상에서 숫자의 가능성을 가진 연결 요소를 검출하고 이들을 군집화 한다. 군집화 된 연결요소들을 바탕으로 숫자 네개(4-digits) 후보를 생성한다. 4-digits 후보들을 인식하여 숫자의 가능성을 측정하고, 적합도로 변환한다. 후보영역 중 적합도가 가장 높은 영역을 번호판 영역으로 추출한다. 적합도는 Perfect Metrics 방법으로 측정하였다. 제안하는 방법을 주간 영상 4600장과 야간 영상 264장으로 테스트 한 결과 각각 97.23%, 95.45%의 검출률과 0.09%, 0.11%의 오검출률을 얻었다.

• 수산해양교육연구
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• 제26권4호
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• pp.797-807
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• 2014

The purpose of this research is to clarify the influence of job satisfaction factors on the turnover of marine sports employees and propose the methodical and scientific preliminary data suggesting the development of marine sports and policy direction. To achieve this research was conducted on 247 marine sports workers from February to March, 2013 and the findings are shown below. Firstly, male workers showed higher satisfaction rate in social recognition and salary. Female workers showed higher satisfaction in work conditions. Married workers with related license holders negative in promotion, but workers who are 50 and older with high school diploma showed higher satisfaction. Secondly, group of singles showed higher satisfaction rate in social recognition and peer relationship. People with related majors showed higher satisfaction in suitability, salary, peer relationship and social recognition. Thirdly, those who show higher satisfaction in social recognition, work condition, salary, suitability, and promotion are show a lower likelihood of changing their job.

• 한국멀티미디어학회논문지
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• 제23권4호
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• pp.517-524
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• 2020

Recently, many researches have been conducted to automatically recognize license plates of vehicles and use the analyzed information to manage stolen vehicles and track the vehicle. However, such a system must eventually be investigated by people through direct monitoring. Therefore, in this paper, the system of tracking a vehicle is implemented by sharing the information analyzed by the vehicle image among cameras registered in the IoT environment to minimize the human intervention. The distance between cameras is indicated by the node and the weight value of the weighted-graph, and the eigenvector centrality is used to select the camera to search. It demonstrates efficiency by comparing the time between analyzing data using weighted graph searching algorithm and analyzing all data stored in databse. Finally, the path of the vehicle is indicated on the map using parsed json data.

• 음성과학
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• 제8권1호
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• pp.53-66
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• 2001

This paper aims to investigate the acoustic characteristics of the vowels attested in Korean and French and to seek a way of understanding them from a phonological point of view. We first compare the two vowel systems by measuring the actual frequencies of the formants using CSL. It is shown that the first and second formants vary in wider range in French compared to Korean. In order to understand the two vowel systems from a phonological point of view, we apply the theory of Licensing Constraints, proposed and developed by Kaye (1994), and Charette and Kaye (1994). We propose the licensing constraints placed upon the vowels both in Korean and French. For Korean, we propose the licensing constraints such that both elements I and U must be heads. For French, we claim the following licensing constraints: U in a headed expression must be head, A cannot be head, and Nothing can only license an expression A in it.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2015년도 추계학술대회
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• pp.1041-1042
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• 2015

본 논문에서는 효율적으로 주차 공간을 확보와 주차장 성능을 향상을 위한 방법으로 차량 번호판 조사를 이용하여 주차 회전율을 구하였다. 본 연구로 효율적으로 주차장을 사용하고 있는지를 알 수 있었고 차량의 주차를 하여 소통되는지를 알 수 있었다.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2011년도 추계학술대회
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• pp.717-725
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• 2011

This study carried out surveys for 197 nail shop practitioners and 195 customers 1) to study the real condition of their hygiene awareness and safety consciousness and 2) to grasp their awareness of the necessity of legislating a related bill so as to build an independent domain of business and to propose data on the national qualification system of nail care. As a result, it was found that the level of the nail care practitioners' experiences of safety education was very low, and that the customers attached importance to the necessity of nail salon practitioners' certificate and license and the nail treatment-related bill more than the nail care practitioners themselves. In conclusion, the preparation of a nail art-related bill is required at the state level for the management of the safety and hygiene of national health, and systematic and regular education related to hygiene should be carried out.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2018년도 추계학술발표대회
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• pp.749-752
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• 2018

깊은 신경망 모델을 이용한 차량 번호판 검출과 번호판 문자 인식 시스템을 제안한다. 차량 번호판 인식 시스템은 세 가지 종류의 깊은 신경망 모델로 구성된다. 기존의 영상처리 기반의 차량 번호판 검출과 문자 인식을 전부 신경망으로 대체함으로써 영상의 밝기, 회전, 왜곡 등의 변형에 강인한 성능을 얻을 수 있다. 차량 번호판 검출률은 99.3%, 문자 영역 검출률은 99%, 문자 인식률을 98.5%를 얻었다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2004년도 춘계학술발표대회
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• pp.773-776
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• 2004

본 논문에서는 에지 검출기에 의해 다양한 명암이 존재하는 차량 번호판 영역의 사각형 에지를 검출시 사용되는 소벨 및 Prewitt, Roberts, 가우시안의 라플라시안, 그리고 Canny 검출기를 사용하여 처리 속도와 에지 검출의 정확성을 실험하여 각 연산자의 성능을 평가하였다. 기존의 Sobel 에지 검출기는 적응적 임계값을 구하지 않으면 다양한 조명의 영향에 강인하지 못하다. 또한 Canny 에지 검출기는 조명의 영향에 강인하기는 하나, 계산량이 Sobel 보다는 많아 처리 속도가 느리다. 색상에 의해 번호판 후보 영역을 추출한 후 에지 검출기 번호판 내의 명암이 둘 이상으로 차량 번호판 영역에 대해서, 다양한 에지 검출기를 적용하여 속도와 에지 검출 성능을 비교 평가하고자 한다.

• 한국안전학회지
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• 제39권3호
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• pp.68-74
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• 2024

Despite the growing importance of safe railroad operation with the recent implementation of the Severe Accident Punishment Act, industrial accidents related to the shunting of railway vehicles persist. Therefore, the government and Korea Railroad Corporation are collaborating on an automated connection and disconnection system that enables remote control of shunting trains from a central control room, utilizing surveillance cameras. By eliminating the need for on-site workers during freight car operations at stations, it aims to reduce safety accidents inherent in manual receiving processes. A qualifying government-issued railway vehicle driver's license is necessary to handle this newly developed automatic connection and disconnection system. As a result, this study aims to establish an appropriate driver qualification system.