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손석우(Son, Seok-Woo),김다이룸(Km, Da-I-Rum),이재철(Lee, Jae-Chul),허용정(Huh Yong-Jeong) 한국산학기술학회 2010 한국산학기술학회 학술대회 Vol.- No.-
본 연구는 LED를 활용한 기능성 숟가락에 관한 것으로, 누구나 쉽게 접하는 기호식품인 차를 뜨겁게 마실 때와 차갑게 마실 때 부주의에 의한 신체 손상을 유발하는 것을 사전에 예방하기 위한 것이다. 특히 유아에게 이유식을 수유하는 경우 어머니들은 차고 뜨거움을 손수 확인하고 있는 실정으로 안전성에 노출되어 있다. 따라서 본 연구에서는 이러한 문제를 해결하기 위하여 온도제어 기술을 이용하여 LED 색의 차이로 기준온도 이하이면 파란 색을, 기준온도 이상이면 빨간 색을 발광하는 원리를 통해 LED 색상 변화로 차고 뜨거움을 사용자에게 쉽게 인지시켜 안전성을 확보하기 위함이다.
상부 대류권-하부 성층권 오존이 성층권 준 2년주기 진동과 매든-줄리안 진동 상관성에 미치는 영향: GloSea5 이용 사례
오지영,손석우,백승윤,Oh, Jiyoung,Son, Seok-Woo,Back, Seung-Yoon 한국기상학회 2022 대기 Vol.32 No.3
Recent studies have shown that Madden-Julian Oscillation (MJO) is modulated by Quasi-Biennial Oscillation (QBO) during the boreal winter; MJO becomes more active and predictable during the easterly phase of QBO (EQBO) than the westerly phase (WQBO). Despite growing evidences, climate models fail to capture the QBO-MJO connection. One of the possible reasons is a weak static stability change in the upper troposphere and lower stratosphere (UTLS) by neglecting QBO-induced ozone change in the model. Here, we investigate the possible impact of the ozone-radiative feedback in the tropical UTLS on the QBO-MJO connection by integrating the Global Seasonal Forecasting System 5 (GloSea5) model. A set of experiments is conducted by prescribing either the climatological ozone or the observed ozone at a given year for the EQBO-MJO event in January 2006. The realistic ozone improves the temperature simulation in the UTLS. However, its impacts on the MJO are not evident. The MJO phase and amplitude do not change much when the ozone is prescribed with observation. While it may suggest that the ozone-radiative feedback plays a rather minor role in the QBO-MJO connection, it could also result from model biases in UTLS temperature and not-well organized MJO in the model.
오정탁,한애리,손석우,최승훈,한석주,황의호,양우익,Oh, Jung-Tak,Han, Ai-Ri,Son, Suk-Woo,Choi, Seung-Hoon,Han, Seok-Joo,Hwang, Eui-Ho,Yang, Woo-Ick 대한소아외과학회 2001 소아외과 Vol.7 No.1
The pathophysiology of Hirschsprung's disease (HD) is not fully understood, but recent studies have disclosed that neural cell adhesion molecule (NCAM) and glial cell line-derived neurotrophic factor (GDNF) play important roles in the formation of aganglionic bowel of Hirschsprung's disease. To evaluate the roles of NCAM and GDNF in HD, immunohistochemical analysis was performed using formalin-fixed and paraffin-embedded tissue sections. On the basis of the results, we tried to evaluate them as diagnostic markers. The specimens were obtained from 7 patients with HD who underwent modified Duhamel operation. The diagnosis was based on the clinical findings and the absence of ganglion cells in the nerve plexuses by routine microscopy. NCAM immunoreactivity was found in the nerve plexuses and scattered nerve fibers in the smooth muscle layers of ganglionic segments. In aganglionic segments, the number of NCAM positive nerve fibers in the smooth muscle layers was significantly reduced compared with ganglionic segments. In two cases the nerve plexuses in aganglionic segments, NCAM was negligible. The smooth muscle cells showed diffuse immunoreactivity for GDNF and the staining intensity was not different in the aganglionic and ganglionic segments. However, higher expression of GDNF in the nerve plexus of the ganglionic segments was noted comparing to aganglionic segments. These data suggest that both NCAM and GDNF may play important roles in pathogenesis of Hirschsprung's disease and immunohistochemical staining for NCAM can be used as an ancillary diagnostic tool for HD.
오정탁,김희진,손석우,한애리,한석주,최승훈,황의호,Oh, Jung-Tak,Kim, Hee-Jin,Son, Suk-Woo,Han, Ai-Ri,Han, Seok-Joo,Choi, Seung-Hoon,Hwang, Eui-Ho 대한소아외과학회 2000 소아외과 Vol.6 No.1
Evaluation of the sacrum in anorectal malformations (ARMs) is important because there is an association between sacral abnormalities and poor functional outcome after corrective surgery for ARM. Sacral defects are not easily detected because of immaturity of sacrum in children and defects are often overlooked by pediatric surgeons. The authors utilized the sacral ratio in normal children (N=61) and patients with ARMs (N=26). In normal children, the mean true sacral ratio and mean sacrococcygeal ratio were $0.60{\pm}0.08$ and $0.72{\pm}0.13$ respectively. The sacral ratio was not correlated with age and did not changed with age in the same patient. However, true sacral ratio and sacrococcygeal ratio were significantly lower in patients with high type ARMs than those of normal children (p<0.001). There was no difference between patients with low type ARMs and normal children. These results suggest that abnormal sacrums are more frequently encountered in patients with high type ARMs than in normal children, and that true sacral ratio and sacrococcygeal ratio can be used in the evaluation of the abnormal sacrum.
기상청 전지구예측시스템 자료에서의 2016~2017년 북반구 블로킹 예측성 분석
노준우(Joon-Woo Roh),조형오(Hyeong-Oh Cho),손석우(Seok-Woo Son),백희정(Hee-Jeong Baek),부경온(Kyung-On Boo),이정경(Jung-Kyung Lee) 한국기상학회 2018 대기 Vol.28 No.4
Predictability of Northern Hemisphere blocking in the Korea Meteorological Administration (KMA) Global Data Assimilation and Prediction System (GDAPS) is evaluated for the period of July 2016 to May 2017. Using the operational model output, blocking is defined by a meridional gradient reversal of 500-hPa geopotential height as Tibaldi-Molteni Index. Its predictability is quantified by computing the critical success index and bias score against ERA-Interim data. It turns out that Northwest Pacific blockings, among others, are reasonably well predicted with a forecast lead time of 2~3 days. The highest prediction skill is found in spring with 3.5 lead days, whereas the lowest prediction skill is observed in autumn with 2.25 lead days. Although further analyses are needed with longer dataset, this result suggests that Northern Hemisphere blocking is not well predicted in the operational weather prediction model beyond a short-term weather prediction limit. In the spring, summer, and autumn periods, there was a tendency to overestimate the Western North Pacific blocking.
GloSea5 모형의 한반도 인근 해수면 온도 예측성 평가: 편차 보정에 따른 개선
강동우(Dong-Woo Gang),조형오(Hyeong-Oh Cho),손석우(Seok-Woo Son),이조한(Johan Lee),현유경(Yu-Kyung Hyun),부경온(Kyung-On Boo) 한국기상학회 2021 대기 Vol.31 No.2
The necessity of the prediction on the Seasonal-to-Subseasonal (S2S) timescale continues to rise. It led a series of studies on the S2S prediction models, including the Global Seasonal Forecasting System Version 5 (GloSea5) of the Korea Meteorological Administration. By extending previous studies, the present study documents sea surface temperature (SST) prediction skill around the Korean peninsula in the GloSea5 hindcast over the period of 1991~2010. The overall SST prediction skill is about a week except for the regions where SST is not well captured at the initialized date. This limited prediction skill is partly due to the model mean biases which vary substantially from season to season. When such biases are systematically removed on daily and seasonal time scales the SST prediction skill is improved to 15 days. This improvement is mostly due to the reduced error associated with internal SST variability during model integrations. This result suggests that SST around the Korean peninsula can be reliably predicted with appropriate post-processing.