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변영지 ( Young Ji Byun ),양정인 ( Jeong In Yang ),유희석 ( Hee Sug Ryu ),오기석 ( Ki Suk Oh ),박희붕 ( Hee Boong Park ),임현이 ( Hyun Ee Yim ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.9
The breast cancer is the second most common malignancy in pregnancy after cervical cancer. Pregnancy-associated breast caner tends to show unfavorable prognosis, because it is diagnosed at more advanced stage due to delay of diagnosis and treatment. For a
변영지 ( Young Ji Byun ),장기홍 ( Ki Hong Chang ),이정필 ( Jung Pil Lee ),유희석 ( Hee Sug Ryu ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.8
Ovarian cancer is one of the main gynecologic malignancies including cervix cancer and endometrial cancer. Epithelial ovarian cancer generally presents with already advanced disease at the time of diagnosis and is known to have a poor prognosis. But ovari
YOUNG-JI BYON(변영지),SEUNG HWAN KIM(김승환),GOANG SUNG JIN(진광성),YOUNG WOOK SEO(서영욱),YOUNG SOON BAEK(백영순) 한국수소및신에너지학회 2023 한국수소 및 신에너지학회논문집 Vol.34 No.6
Recently, a hydrogen charging station-related memorandum of understanding (MOU) was signed between Korea Transport Institute and United Arab Emirates (UAE) Ministry of Transport in Abu Dhabi, creating a foundation for exporting green hydrogen charging stations and hydrogen powered public transit buses developed with Korean technology to Abu Dhabi. Reliable construction and operation of the charging stations require a thorough review on associated standards and legal requirements. In particular, it is essential to analyze currently effective standards related to hydrogen production, hydrogen vehicle charging, and hydrogen charging stations. This paper specifically focuses on comparative analysis of hydrogen-related standards in the UAE and the Republic of Korea. Similar to UAE, Korean hydrogen charging station-related standards follow International Organization for Standardization (ISO) standards. From real-life experiences in developing and operating charging stations, even more essence of ISO standards have been adopted in Korean standards than UAE. In particular, ISO standards related to fire prevention are additionally included in Korea. This paper also suggests procedural and administrative strategies for enabling application of Korean hydrogen charging station-related standards in UAE.
Short-term Travel-time Prediction on Highway: A Review on Model-based Approach
오시몬,변영지,장기태,여화수 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.1
Emerging technologies provide a venue on which on-line traffic controls and management systems can be implemented. For such applications, having access to accurate predictions on travel-times are mandatory for their successful operations. Transportation engineers have developed numerous approaches including model-based approaches. The model-based approaches consider underlying traffic mechanisms and behaviors in developing the prediction procedures and they are logically intuitive unlike datadriven approaches. Because of this explanation power, the model-based approaches have been developed for the on-line control purposes. For departments of transportation (DOTs), it is still a challenge to choose a specific approach that meets their requirements. In efforts to develop a unique guideline for transportation engineers and decision makers when considering for implementing modelbased approaches for highways, this paper reviews model-based travel-time prediction approaches by classifying them into four categories according to the level of details involved in the model: Macroscopic, Mesoscopic, CA-based, and Microscopic. Then each method is evaluated from five main perspectives: Prediction range, Accuracy, Efficiency, Applicability, and Robustness. Finally, this paper concludes with evaluations of model-based approaches in general and discusses them in relation to data-driven approaches along with future research directions.