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초계함용 HMS(Hull Mount Sonar)를 이용한 어뢰방어시스템 연구
김희언,김영길,Kim, Hee-Earn,Kim, Young-Kil 한국정보통신학회 2012 한국정보통신학회논문지 Vol.16 No.11
초계함(천안함급)에 탑재 된 HMS(Hull Mount Sonar) 장비는 능동모드에 적합하도록 설계 되어 있다. 이에 센서 및 시스템 특성이 어뢰 탐지 주파수 대역에 적당하도록 구성되어 있지는 않다. 이에 초계함에 장착 된 기존 HMS 장비를 이용한 어뢰탐지 기능 구현을 위하여, 초계함 함 별 입력 특성을 분석하고, 입력 주파수 신호에 대한 역보상 회로 설계, 입력 신호 크기에 따른 AGC(Auto Gain Control) 기능 구현 및 함별 신호특성에 따른 대역설정 기능을 통하여 함정 별 특성 및 운용환경 특성에 맞는 어뢰방어시스템을 구현하였다. HMS(Hull Mount Sonar) equipment mounted on PCC(Patrol Combat Corvette) is suitably designed for active mode, and the specific character of sensor or system is not appropriate for the frequency range to detect a torpedo. In this article, in order to implement the function of detecting torpedoes with HMS of existing PCC, I will analyze the feature of input signals each PCCs and design a circuit to compensate reversely for the input signal in certain frequency. And also, I will suggest the most adequate torpedo defense system suitable for the special operating environment and the characteristic of naval vessels, implementing functions such as AGC of input signal and fixing the frequency range of different input signals per different warships.
김희언(Hee Eon Kim),김은자(EunJa Kim),김가은(Gaeun Kim) 한국콘텐츠학회 2015 한국콘텐츠학회논문지 Vol.15 No.1
본 연구는 모바일 앱을 이용한 당뇨 환자 관리관련 선행연구들을 체계적으로 고찰하여 임상적 유용성에 미치는 효과를 분석하고, 이를 토대로 근거 중심의 가이드라인 제공 및 향후 연구방향을 제시하고자 시도되었다. 데이터베이스는 Ovid, CINAHL, Cochrane library를 활용하였으며 (app*OR mobile) AND (nurs* OR health* OR medic*) AND (diabet*)을 주요어로 2004년부터 2014년까지의 문헌을 대상으로 검색하였다. 총 375편의 연구 중 3편의 논문이 최종 선정되었고, Scottish Intercollegiate Guidelines Network (SIGN)의 Checklist를 이용해 문헌의 질을 평가하였다. 연구결과 앱을 적용한 당뇨관리는 당화혈색소 감소에 통계적으로 유의한 효과가 있었다. 추후 연구의 설계유형이나 이를 기반으로 한 효과적인 중재개발 연구를 제안한다. 향후 충분한 표본수를 고려한 무작위 실험연구와 당화혈색소 이외 생리적 지표와 심리적 지표에 대한 연구가 더 많이 시행될 필요가 있다. The purpose of this review was to evaluate the effects of diabetes management program using mobile appllication. A systematic review using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses: the PRISMA Statement was conducted. Studies published between 2004 and 2014 were reviewed using the following databases: Ovid, CINAHL and Cochrane library. The keywords used were (app*OR mobile) AND (nurs* OR health* OR medic*) AND (diabet*). Selected studies were assessed for methodological quality using Scottish Intercollegiate Guidelines Network (SIGN)’ Checklist. Three hundred seventy five studies were identified, All the 3 studies found mobile application as a valid strategy on clinical usefulness in diabetes management. This review provides updated evidence for app-based management program in diabetes management. Further studies are needed to increase generalizability using randomized controlled trials, enough sample size. In addition, valid measurements are needed to assess the main outcomes.
김희언 ( Hee Yeon Kim ),김창욱 ( Chang Wook Kim ),이창돈 ( Chang Don Lee ),이수림 ( Su Lim Lee ),원유동 ( Yoo Dong Won ),김예일 ( Ye Il Kim ) 대한간암학회 2014 대한간암학회지 Vol.14 No.1
A 50-year-old male patient visited for further evaluation of arterial enhancing nodules in cirrhotic liver. Computed tomography (CT) scan revealed vaguely nodular, arterial phaseenhancing nodules at segment 8 of the liver with cirrhotic background. Magnetic resonance imaging (MRI) showed four small nodules with early work-up enhancement in arterial phase and rapid washout. Angiography showed hypervascular nodular stains. Hepatocellular carcinoma (HCC) was diagnosed according to the noninvasive diagnostic criteria for HCC. A positron emission tomography (PET) scan was done for staging work-up, and increased uptake was noted in rectum. Subsequently, sigmoidoscopy revealed an ulceroinfiltrative lesion encircling the lumen of the rectosigmoid junction. Laparoscopic low anterior resection with wedge resection of liver was done, suspecting concurrent primary tumors of the rectum and liver. Pathologic examination demonstrated moderately differentiated adenocarcinoma in both rectum and liver, suggesting metastatic rectal carcinoma. The present case indicates that metastatic carcinoma as well as HCC should be considered in the differential diagnosis of irregularly enhancing small nodules even in high-risk patient group for HCC.
수술 후 조기에 재발하여 경동맥화학색전술로 완치된 간세포암종 증례
김희언 ( Hee Yeon Kim ),김창욱 ( Chang Wook Kim ),김성근 ( Sungkeun Kim ),이수림 ( Soo Lim Lee ),구영미 ( Young Mi Ku ),원유동 ( Yoo Dong Won ) 대한간암학회 2018 대한간암학회지 Vol.18 No.2
Although surgical resection is a curative treatment option for solitary hepatocellular carcinoma, high recurrence rate contributes to dismal long-term prognosis after curative resection. Early recurrence within 2 years after surgery is associated with intrahepatic metastasis of primary tumor. Liver regeneration after hepatic resection can accelerate tumorigenesis in remnant liver. Treatment strategies for intrahepatic recurrence after curative resection include salvage transplantation, repeated resection, local ablation, and transarterial chemoembolization (TACE). Here, we report a 51-year-old male who was presented with a single large tumor located at segment 4. The patient was initially treated with surgical resection, but intrahepatic recurrence occurred only 4 months after surgery. He achieved complete remission with repeated TACE and has survived without recurrence for 4 years so far. (J Liver Cancer 2018;18:162-167)
담관을 침범한 간세포암을 경동맥 화학색전술로 치료한 증례
김희언 ( Hee Yeon Kim ),김창욱 ( Chang Wook Kim ),이창돈 ( Chang Don Lee ),이수림 ( Soo Lim Lee ),원유동 ( Yoo Dong Won ),김예일 ( Ye Il Kim ) 대한간암학회 2013 대한간암학회지 Vol.13 No.2
A 53-year-old female patient visited our hospital complaining of intermittent right upper quadrant pain for 6 months. Computed tomography (CT) scan revealed an irregular shaped tumor at segment 4 of the liver with biliary tumor thrombi extending into the common bile duct. Percutaneous transhepatic biliary drainage was done for decompression of bile duct dilatation. The patient underwent 6 sessions of transarterial chemoembolization (TACE). Partial response was obtained shortly after TACE. However, regrowth of intraductal tumor resulted in an obstructive jaundice. After a slight decompression of the obstructive jaundice, the patient underwent TACE. Jaundice temporarily worsened following the TACE, but improved, and follow-up CT demonstrated some shrinkage of the intraductal mass. This case indicates that obstructive-type jaundice may not be a contraindication for TACE, and aggressive TACE may improve prognoses of patients with hepatocellular carcinoma and biliary tumor thrombi.
부신피질 결핵에 의한 Addison씨 병 환자에서 리팜핀 투여 후 혈액투석이 필요하였던 심한 고칼륨혈증
김현경 ( Hyun Gyung Kim ),윤유선 ( Yoo Sun Yoon ),김희언 ( Hee Hun Kim ),김영수 ( Young Soo Kim ),김병수 ( Byung Soo Kim ),윤선애 ( Sun Ae Yoon ),김영옥 ( Young Ok Kim ) 대한신장학회 2009 Kidney Research and Clinical Practice Vol.28 No.1
Rifampicin, a potent inducer of hepatic microsomal enzymes, increases metabolism of steroid hormone. Therefore, concurrent treatment of rifampicin and steroid may lead to decreased bioavailability and increased requirement of steroid hormone. Here we report a case of rifampicin-induced severe hyperkalemia requiring hemodialysis in a patient with Addison`s disease. A 52-year-old woman was admitted due to general weakness. She had been diagnosed with adrenal tuberculosis and consequent Addison`s disease and treated with rifampicin and physiologic dose of steroid. Blood chemistry showed 9.1 mEq/L of potassium and emergent hemodialysis was performed. With increment of dosage of steroid hormone and maintenance of the same dosage of rifampicin, potassium level was normalized.
요오드 과민반응이 있는 인조혈관 동정맥루 폐쇄 환자에서 Gadolinium 조영제를 사용한 성공적인 혈관확장술
강봉구 ( Bong Koo Kang ),김병수 ( Byung Soo Kim ),신미정 ( Mi Jung Shin ),김희언 ( Hee Hun Kim ),김현경 ( Hyun Kyung Kim ),김영수 ( Young Soo Kim ),윤선애 ( Sun Ae Yoon ),원유동 ( Yoo Dong Won ),김영옥 ( Young Ok Kim ) 대한신장학회 2009 Kidney Research and Clinical Practice Vol.28 No.3
Percutaneous transluminal angioplasty (PTA) using iodine contrast dye has been used as the definitive method of choice for treating hemodialysis vascular access dysfunction. Occasionally, iodine material can not be used in the hemodialysis patients with a history of severe hypersensitivity reactions or the predialysis patients with premature access awaiting hemodialysis treatment. Gadolinium chelates have been reported as an alternative contrast agent for angiography or angioplasty in such patients. Here we report a case of successful angioplasty of arteriovenous graft obstruction using gadolinium chelate (gadopentetate dimeglumine) in a patient with repetitive iodine hypersensitivity reactions.
김희언(Hee Un Kim),이근희(Keun hee Lee),이하성(HaSeong Lee),박순천(Sun Cheon Park) 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10
한반도 지각은 남동쪽으로 연평균 30 mm의 속도로 이동하며 이에 관한 여러 선행연구가 수행되었다. 또한, 한반도는 동아시아의 다른 지역에 비해 비교적 안정적인 지각으로 알려져 있다. 그러나 2011년에 도호쿠 지방 태평양 해역에서 발생한 규모 9.0의 동일본대지진으로 인해 한반도 지각에 큰 영향을 주었다. 지진 발생 당시 한반도는 평균 약 30 mm 지각변형이 관측되었으며, 동해안 지역에서는 순간적으로 최대 약 50 mm가 움직였다. 동일본대지진으로 인해 한반도는 동서지역 간 이동 방향 및 속도 차이가 발생하였으며 이는 한반도 내부 지각의 응력변화를 야기했을 가능성이 있다. 본 연구에서는 최근 15년간의 국토지리정보원을 포함한 국내 GNSS 상시관측소 약 60여개소를 활용하여 동일본대지진 전후의 한반도의 지각변동 추세를 분석하였다. 분석방법은 IGS관측소 10개소를 기준으로 한반도의 전지구적 지각 변동을 분석하였고, 국내 수원 관측소를 기준으로 한반도 내부 지각의 왜곡을 분석하였다. 본 연구에서는 동일본대지진 이후 한반도 지각 변동의 추세를 분석하고, 지각의 안정성을 평가하였다.