Reconstruction of a Large Cricotracheal Defect Using a Sternocleidomastoid Myoperiosteal Flap : A Case of Locally Aggressive Papillary Thyroid Carcinoma with Tracheal Invasion

김상민,김미라,김용완,백무진,박준욱,Kim, Sang Min,Kim, Mi Ra,Kim, Yong-Wan,Baek, Moo Jin,Park, Jun-Ook 대한두경부종양학회 2015 대한두경부 종양학회지 Vol.31 No.1

기관을 침범한 갑상선 악성종양을 제거한 후에 성문하부에 비교적 큰 기관 결손이 발생할 수 있다. 단단문합술은 넓은 부위의 결손부를 재건하는 방법으로 널리 받아들여지고 있지만, 문합부 파열, 반회후두신경마비, 재협착 등의 합병증이 발생할 수 있다. 본 증례는 기도를 침범한 갑상선 유두암종을 제거한 후 윤상연골과 기관연골의 비교적 큰 결손부를 흉쇄유돌근 근골막피판을 사용하여 안전하게 재건한 사례이다. 55세 남자 환자가 기도를 침범한 갑상선 유두상암으로 내원하였으며 기도침범은 윤상연골(둘레의 약 30%)과 4개의 기관연골(둘레의 약 50%)을 해당하는 넓은 부위였다. 수술 전 기관절개술을 시행하여 주위 기관연골의 상태가 좋지 않아 단단문합술 시행 후 문합부 파열 가능성이 있다고 판단하여 흉쇄유돌근 근골막피판을 이용하여 재건하기로 계획하였다. 갑상선 절제술, 경부림프절 절제술, 흉쇄유돌근 근골막피판을 이용한 재건술을 시행하였으며 수술 후 12일째 별다른 문제없이 퇴원하였다. 환자는 수술 후 현재 22개월 간 기도 협착 등의 별다른 합병증 없이 지내고 있다. 흉쇄유돌근 근골막피판은 성문하부나 기관지 전외측벽의 비교적 큰 결손부를 재건하는 데 유용하게 사용될 수 있다.

농업용 저수지에서의 환경용수 방류 능력 평가

김상민,김성재,김용완,박태양,김성민,박기욱,장민원,Kim, Sang-Min,Kim, Sung-Jae,Kim, Yong-Wan,Park, Tae-Yang,Kim, Sung-Min,Park, Ki-Wook,Jang, Min-Won 한국농공학회 2011 한국농공학회논문집 Vol.53 No.6

The purpose of this study was to establish the methodology for providing the environmental flows from irrigation reservoir. Reservoir water budget for study area was analyzed to simulate the water supply scenarios for environmental flows. Bonghyun and Hi reservoirs area, located in Gyeongnam, Gosung-gun, Hi-myeon, were selected for study watersheds and streams for this study. Reservoir operation was simulated to determine the envionmental flows supply amount from March to October with the constraint that environmental flow supply was restrained when the storage of reservoir were below the half or one-third of effective storage. The simulated results indicated that the supply of environmental flows with the amount of 200 ton/day and 600 ton/day resulted in up to 15 mm and 29 mm of runoff depth increase in the downstream, respectively. The effect of environmental flows supply from existing irrigation reservoir was not significant because the irrigation reservoir was not designed to supply the environmental flows. It is necessary to remodel the irrigation reservoir and develop the reservoir operation technique, to meet the need for the environmental flows.

Ester Linkage 를 함유한 Bismaleimide 의 합성과 감광특성

김상민,김태호 ( Sang Min Kim,Tae Ho Kim ) 한국공업화학회 1997 공업화학 Vol.8 No.2

N-(p-carboxyphenyl)maleimide의 염소화물을 N-(p-hydroxyphenyl)maleimide와 반응시켜 중심에 에스테르 결합을 가지고 있는 bismaleimide(BISMI)를 합성하였다. 합성된 BISMI의 감광특성을 확인한 결과 사용된 benzil dimethyl ketal 광개시제의 농도와 자외선 조사량을 증가시킴에 따라 BISMI의 점도가 증가하는 경향을 보였다. 또한 BISMI의 잔막수율의 변화와 화상형성능력 및 최소선폭을 검토하였다. Bismaleimides(BISMI) containing ester linkages were prepared by the chlorinated N-(p-carboxyphenyl)maleimide and N-(p-hydroxyphenyl)maleimide. The photosensitive properties of BISMI were investigated via changes of the irradiation time. Benzil dimethyl ketal was used as a photoinitiator. The effect of photoinitiator onto BISMI increase in average as increasing photoinitiator concentration and irradiation time. The yield of residual film and image pattern and resolution also measured and discussed.

회귀분석을 이용한 지하수 수위 변화 추정

김상민,안병일,Kim, Sang-Min,Ahn, Byeong-Il 한국농공학회 2011 한국농공학회논문집 Vol.53 No.6

The objective of this study is to identify whether or not the ground water level is decreasing. We suggest a method of estimating the change in groundwater level using newly developed groundwater pumping station data. The Goseong area located in Gyeongnam province was selected considering three factors. First, this area demands relatively large amount of irrigation water because most of the land is used as a paddy field and the proportion of the paddy field within total arable land is increasing. Second, groundwater level data in nearby area are available since these are monitored by Water Management Information System (WAMIS). Third, many groundwater pumping stations have been developed in this area in order to overcome droughts thus detail information for pumping stations are available. Regression results indicate groundwater level has been decreased for over 20 years. This decreasing trend is due to the shortage of surface irrigation water which was caused by the decrease in rainfall.

위치기반서비스 이용에 대한 인지된 위험의 영향 연구

김상민,이지은,박찬권,Kim, Sang Min,Lee, Ji-Eun,Park, Chankwon 한국디지털정책학회 2014 디지털융복합연구 Vol.12 No.12

개인정보 관련 사건사고가 증가하면서 개인정보 기반의 모바일 서비스에 대한 우려가 늘고 있다. 본 연구는 스마트폰 보급 확대로 이용이 증가하고 있는 위치기반서비스 앱 이용에 영향을 미치는 요인을 도출하고 이에 대한 인지된 위험의 영향력을 확인하고자 하였다. 이를 위해 위치기반서비스 앱 이용 행위에 영향을 미치는 변수를 도출한 후 인지된 위험이 이들 변수와 앱 이용 행위 사이에 어떤 영향을 미치는가를 실증 분석하였다. 분석 결과, 유용성과 사회적 영향은 위치기반서비스 앱 이용에 영향을 미치나, 인지된 위험을 높게 인식하는 집단은 유용성으로부터, 인지된 위험을 낮게 인식하는 집단은 사회적 영향으로부터 이용 행위에 더 크게 영향을 받는 것으로 나타났다. 위치기반서비스 산업의 성장을 위해서는 인지된 위험의 교섭력을 최소화하기 위한 정보보호 정책과 보호기술이 요구되며 기업 입장에서는 인지된 위험 수준에 따른 개발 전략을 취해야 할 것이다. As the disclosure of privacy information has grown steadily, concerns about mobile services based on the personal information also increased. We aspired to reveal factors influencing the use of Location-Based services(LBS) App and analyse how the perceived risk affected between these factors and the use of LBS App. Results showed that usefulness and social influence influenced on the use of LBS App. We also found that the group who highly recognized the perceived risk was highly affected by usefulness and the group who lowly recognized the perceived risk was highly affected by social influence. Findings show that the company's strategy should be different depending on the level of consumers' perceived risk.

국립공원내 홍수피해 저감을 위한 미계측 산림지역의 설계홍수량 추정

김상민,임상준,이상호,김형호,마호섭,정원옥,Kim, Sang-Min,Im, Sang-Jun,Lee, Sang-Ho,Kim, Hyung-Ho,Ma, Ho-Seop,Jeong, Won-Ok 한국농공학회 2009 한국농공학회논문집 Vol.51 No.5

The purpose of this study is to estimate the design flood runoff for ungaged forest watershed to reduce the flood damage in national park. Daewonsa watershed in Jirisan National Park was selected as study watershed, of which characteristic factors were obtained from GIS data. Flood runoff was simulated using SCS unit hydrograph module in HEC-HMS model. SCS Curve Number (CN) was calculated from forest type area weighted average method. Huff's time distribution of second-quartile storm of the Sancheong weather station, which is nearest from study watershed, was used for design flood runoff estimation. Critical storm duration for the study watershed was 3 hrs. Based on the critical duration, the peak runoff for each sub-watershed were simulated. It is recommended to monitor the long-term flow data for major stream stations in National Park for a better reliable peak runoff simulation results.

슬관절 통증 환자의 한의학적 치료 호전도와 BMI 와의 상관성

김상민,이순호,최지훈,김현중,구자성,장재원,이동현,유형진,Kim, Sang-Min,Lee, Sun-Ho,Choi, Ji-Hoon,Kim, Hyun-Joong,Koo, Ja-Sung,Jang, Jae Won,Lee, Dong-hyun,Yoo, Hyung Jin 척추신경추나의학회 2016 척추신경추나의학회지 Vol.11 No.1

Objectives : This study was designed to assess the general distribution, clinical effectiveness of Korean medical treatment on knee pain and the correlation between Korean medical therapy on knee pain and BMI. Methods : This is an observational study. 65 patients admitted to Daejeon Jaseng Hospital of Korean Medicine with musculoskeletal disorders were observed from July, 2014 to July, 2015. They were analyzed according to sex, age, pain lesion, body mass index(BMI) and treatment efficacy. All patients received a combination of treatments during hospitalization, including acupuncture, pharmacopuncture, herbal medicines and physical therapy. A zero to ten numerating rating scale (NRS) assessing pain, Western Ontario and McMaster Universities Arthritis Index(WOMAC) index and Range of Motion(ROM) was used before and after treatments. Statistical correlations among assessment measurements were evaluated by examining the paired t-test and the Pearson's correlation coefficients. Results : The average BMI of all patients was $24.03{\pm}2.95kg/m^2$. According to clinical definition of obesity by Korean Society for the Study of Obesity, 33.8% of all patients was within normal weight, 1.5% was underweight, 33.8% was overweight, 24.6% was obesity and 6.2% was morbid obesity. For knee pain patients, NRS (Numeric Rating Scale) decreased from $6.28{\pm}1.63$ to $3.94{\pm}2.03$(p<0.001). WOMAC index decreased from $48.14{\pm}17.63$ to $40.37{\pm}18.28$(p<0.001). But, there were no significant correlations in statistics among BMI, knee pain index and knee pain index improvement. Conclusions : Korean medical combination treatment might be effective in reducing pain and improving functional disorders for patients with knee pain. This study further confirmed the efficacy of Korean medical treatment on knee pain. But, more studies on correlation between knee pain and obesity and development of assessment measurement are needed.

초고층건물 시공에 적용되는 기상관측시스템

김상민,박명식,Kim, Sang-Min,Park, Myeong-Sik 대한설비공학회 2007 설비저널 Vol.36 No.2

신경망을 이용한 로버스트 주성분 분석에 관한 연구

김상민,오광식,박희주,Kim, Sang-Min,Oh, Kwang-Sik,Park, Hee-Joo 한국데이터정보과학회 1996 한국데이터정보과학회지 Vol.7 No.1

Principal component analysis(PCA) is an essential technique for data compression and feature extraction, and has been widely used in statistical data analysis, communication theory, pattern recognition, and image processing. Oja(1992) found that a linear neuron with constrained Hebbian learning rule can extract the principal component by using stochastic gradient ascent method. In practice real data often contain some outliers. These outliers will significantly deteriorate the performances of the PCA algorithms. In order to make PCA robust, Xu & Yuille(1995) applied statistical physics to the problem of robust principal component analysis(RPCA). Devlin et.al(1981) obtained principal components by using techniques such as M-estimation. The propose of this paper is to investigate from the statistical point of view how Xu & Yuille's(1995) RPCA works under the same simulation condition as in Devlin et.al(1981).

GIS 기반 농경지 침수모의시스템의 구축 및 적용

김상민,박종민,박승우,Kim , Sang-Min,Park , Chong-Min,Park , Seung-Woo 한국농공학회 2004 한국농공학회논문집 Vol.46 No.5

A GIS-based paddy inundation simulation system which is capable of simulating temporal and spatial inundation processes was established and applied in this paper. The system is composed of HEC-GeoHMS, and HEC-GeoRAS modules which interface the GIS and flood runoff models, and HEC-HMS, and HEC-RAS models which estimate the flood runoff. It was used to simulate storm runoff and inundation for a small rural watershed, the Baran HP#7, which is 10.69 $km^2$ in size. The simulated peak runoff, time to peak, and total direct runoff for eight storms were compared with the observed data. The results showed that the coefficient of determination ($R^2$) for the observed peak runoff was 0.99 and an error, RMSE, 11.862 $m^3$/s for calibration stages. In the model verification, $R^2$ was 0.99 and RMSE 1.296 $m^3$/s. Paddy inundation for each paddy growing stages in study watershed were estimated using verified inundation simulation system when probability rainfall was applied.