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2016년 1월 폭설을 동반한 제주도 한파의 원인 재고찰
한광희,구호영,배효준,김백민,Han, Kwang-Hee,Ku, Ho-Young,Bae, Hyo-Jun,Kim, Baek-Min 한국기상학회 2022 대기 Vol.32 No.3
In Jeju, on January 23, 2016, a cold surge accompanied by heavy snowfall with the most significant amount of 12 cm was the highest record in 32 years. During this period, the temperature of 850 hPa in January was the lowest in 2016. Notably, in 2016, the average surface temperature of January on the Polar cap was the highest since 1991, and 500 hPa geopotential height also showed the highest value. With this condition, the polar vortex in the northern hemisphere meandered and expanded into the subtropics regionally, covering the Korean Peninsula with very high potential vorticity up to 7 Potential Vorticity Unit. As a result, the strong cold advection, mostly driven by a northerly wind, around the Korean Peninsula occurred at over 2𝜎. Previous studies have not addressed this extreme synoptic condition linked to polar vortex expansion due to the unprecedented Arctic warming. We suggest that the occurrence of a strong Ural blocking event after the abrupt warming of the Barents/Karas seas is a major cause of unusually strong cold advection. With a specified mesoscale model simulation with SST (Sea Surface Temperature), we also show that the warmer SST condition near the Korean Peninsula contributed to the heavy snowfall event on Jeju Island.
한광희,김동진,윤정호,정의원,김창성,조규성,채중규,김종관,최성호,Han, Kwang-Hee,Kim, Dong-Jin,Yun, Jeong-Ho,Jung, Ui-Won,Kim, Chang-Sung,Cho, Kyoo-Sung,Chai, Jung-Kiu,Kim, Chong-Kwan,Choi, Seong-Ho 대한치주과학회 2004 Journal of Periodontal & Implant Science Vol.34 No.3
The Palatal masticatory mucosa was widely used as a donor site in periodontal and implant surgery. but there were relatively few studies investigating the thickness of the palatal mucosa in dentate subjects. The purpose of this study was to study the thickness of palatal masticatory mucosa in korean subjects by direct clinical technique. Forty systemically and periodontally healthy subjects(20 males:20 females) participated in this study. A bone sounding method using a periodontal probe with minimal anesthesia and a prepared clear acrylic stent was utilized to assess the thickness of palatal mucosa at 24 measurement points defined according to the gingival margin and mid palatal suture. The results are as follows; 1. Mean thickness of palatal masticatory mucosa was $3.5{\pm}0.4mm$. and no gender differences were identified in the thickness of palatal masticatory mucosa. 2. The thickness of palatal masticatory mucosa increased from canine to second molar area(with the exception of the first molar area). canine and first molar areas were significantly thinner than other areas(P<0.05). 3. The thickness of palatal masticatory mucosa significantly increased in the sites farther from the gingival margin towarding the mid-palate(P<0.05). The results suggest that within the limits of the present study, premolar area appears to be the most appropriate donor site for soft tissue grafting procedures.
시스템 다이나믹스 방법론을 활용한 전기자동차 배터리 임대사업 가치사슬의 평가
한광희 ( Kwang Hee Han ),변상흠 ( Sang Heum Byun ),김원규 ( Wonk Yu Kim ),김병종 ( Byung Jong Kim ),나승원 ( Seung Won Na ) 한국로지스틱스학회 2012 로지스틱스연구 Vol.20 No.3
본 연구는 배터리 자동 교환형 전기버스(Smart e-Bus) 시스템의 정착 및 활성화를 위한 최적 전략 수립의 일환으로, 배터리 임대사업의 가치사슬을 재무적 타당성 측면에서 평가하기였다. 이를 위해 Smart e-Bus System의 도입을 통해 새로이 구성될 수 있는 배터리 임대사업의 가치사슬 구조를 분석하였고, 시스템 다이나믹스 방법론을 활용하여 재무적 타당성 평가 모형을 구축하였다. 그리고 실제 서울시 버스 네트워크에 적용하여 배터리 임대사업의 재무적 타당성 분석을 수행하였다. 본 연구의 결과는 향후 Smart e-Bus 시스템 구축전략의 최적화 수준을 높여 사업의 집행의 이해관계당사자들의 참여를 촉진하는데 기여할 것으로 기대된다. The Smart e-Bus system is the automatic battery swapping electric bus system consisting of battery swapping electric buses, battery exchanging platforms and emergency charging systems. Existing electric vehicles`` market is not growing owing to long charging hour, unpredictable travel range, expensive battery price and battery safety issues. By introducing the Smart e-Bus system, we can expect to promote a wide acceptance of electric vehicles in the consumer market. The purpose of this study is to evaluate sustainability of the Smart e-Bus system market. For this purpose, we suggested the financial feasibility analysis model of electric vehicle battery rental value chain using system dynamics approach. This study results are expected to optimize the Smart e-Bus system strategy and promote participation of stakeholders.
일본 제조기업의 리쇼어링 현황과 일본 정부의 기업 유치 지원제도
한광희(Kwang-Hee Han) 한일경상학회 2023 韓日經商論集 Vol.98 No.-
Purpose: This study examines the current situation and characteristics of reshoring, manufacturers return to Japan from their production bases that have been relocated abroad amid increased instability in the global supply chain due to factors such as COVID-19 and Russia’s invasion of Ukraine. This study tried to figure out what kind of reshoring business attraction support policies are being deployed by the central government or local governments in Japan. Also the author tried to derive what implications these support policies have for Korea. Research design, data, and methodology: This study collects and analyzes the contents of previous research papers related to the Japanese government’s support system for attracting reshoring companies, statistical data from research institutes, press releases from media companies, and homepages of local governments regarding reshoring of Japanese manufacturing companies. Results: The Japanese government has executed various support policies at the central and local governments level to turn reshoring manufacturing companies into opportunities to contribute to the country’s economic regeneration and local growth, resulting in more than 500 companies returning to Japan annually in recent years. These results had the effect of creating new jobs in various parts of Japan, and the increase in local governments’ tax revenues led to the revitalization of the local economy. Implications: In order to induce a successful return to Korea for manufacturers wishing to reshor, policies that can provide unconventional incentives such as smart factory construction, R&D support, and corporate tax cuts for reshoring companies should be reviewed and prepared.