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강민규,김성동,Kang, Min-gyu,Kim, Sungdong 한국마이크로전자및패키징학회 2020 마이크로전자 및 패키징학회지 Vol.27 No.4
웨어러블 소자를 구현하기 위한 칩-섬유 접합 기술을 중심으로 전자 섬유에 대한 기술 개발 동향을 소개한다. 전자 부품을 섬유에 접합하기 위해서는 먼저 전자 부품에 전원 공급 및 전기적 신호를 주고 받기 위한 회로를 섬유에 구성해야 하며, 회로의 해상도와 밀도에 따라 전도성 실을 이용하는 자수법 또는 전도성 페이스트 등을 이용한 프린트법을 통해 구현할 수 있다. 전자 부품과 섬유를 접합하기 위해서는 솔더링, ACF/NCA, 자수법, 크림핑 등의 방법을 이용하여 영구적으로 접합하거나 후크, 자석, 지퍼 등을 이용하여 탈부착이 가능하도록 접합하는 방법이 있으며, 접합 배선의 밀도 및 용도에 따라서 단독 또는 융합하여 사용한다. 접합 이후에는 방수 등 사용환경에서의 신뢰성을 확보하기 위해 encapsulation 작업을 수행해야 하며, 현재는 PDMS 등의 폴리머를 이용한 방법이 널리 쓰이고 있다. This paper reviews the recent development of electronic textile technology, mainly focusing on chip-textile bonding. Before the chip-textile bonding, a circuit on the textile should be prepared to supply the electrical power and signal to the chip mounted on the fabrics. Either embroidery with conductive yarn or screen-printing with the conductive paste can be applied to implement the circuit on the fabrics depending on the circuit density and resolution. Next, chip-textile bonding can be performed. There are two choices for chip-textile bonding: fixed connection methods such as soldering, ACF/NCA, embroidery, crimping, and secondly removable connection methods like a hook, magnet, zipper. Following the chip-textile bonding process, the chip on the textile is generally encapsulated using PDMS to ensure reliability like water-proof.
분산 운영 체제에서 효율적인 데이타 전송을 위한 IPC 메카니즘에 관한 연구
강민규(Min Gyu Kang),김창민(Chang Min Kim),김영찬(Young Chan Kim) 한국정보과학회 1987 한국정보과학회 학술발표논문집 Vol.14 No.2
분산 운영체제에서 프로세스간의 remote operation 을 지원하는 IPC 메카니즘이 프로세스간의 통신을 돕기 위해 어떠한 기능을 갖느냐에 따라 분산 운영체제의 특성과 성능에 대한 영향이 매우 크다. 따라서 본 논문은 통신시에 일어날 수 있는 다량의 데이타 전송을 보다 효율적으로 수행 할 수 있는 통신규약을 제시하였고 이에 따른 IPC 프리미티브를 설계하였다.
증례 : 순환기 ; 영구형 인공심박동기 삽입술 후 발생한 스트레스성 심장 근육병증 1예
강민규 ( Min Gyu Kang ),김나영 ( Na Young Kim ),박정랑 ( Jeong Rang Park ),황석재 ( Seok Jae Hwang ),박용휘 ( Yong Whi Park ),곽충환 ( Choong Hwan Kwak ),황진용 ( Jin Yong Hwang ) 대한내과학회 2012 대한내과학회지 Vol.82 No.5
Stress-induced cardiomyopathy is a disease characterized by acute transient left ventricular dysfunction following exposure to stressful situations. We encountered an 80-year-old woman with complete atrioventricular block and normal LV systolic function. After permanent pacemaker implantation, electrocardiogram showed inverted T-waves in precordial leads. Follow-up echocardiographic findings indicated dyskinesia of the apical wall. Final diagnosis was stress-induced cardiomyopathy associated with a physically stressful condition (i.e., pacemaker implantation). (Korean J Med 2012;82:609-613)
히트 스프레더를 적용한 150W급 고출력 투광등용 LED 광학엔진 연구
강민규(Min-Gyu Kang),허인성(In-Sung Her),유영문(Young Moon Yu),최희락(Hee-Lack Choi) 한국조명·전기설비학회 2017 조명·전기설비학회논문지 Vol.31 No.1
In this paper, design and heat dissipation of the LED lighting engine using the heat spreader were investigated to reduce weight and improve heat dissipation of 150W LED light. LED optical light engine A with heat spreader was lighter 3.8kg than LED optical light engine B with fin type heat sink. As a result of heat dissipation analysis, the maximum and average temperatures of the LED package using LED lighting engine A were lowered 2.16℃ and 3.45℃, than those using LED lighting engine B, respectively. The surface temperatures of the PCB in LED lighting engine A were lower than those of LED lighting engine B. The temperature difference between LED package and PCB of LED lighting engine A and B were 2.76℃ and 2.88℃, respectively. The thermal resistances of LED lighting engine A and B were measured 0.418K/W, 0.411K/W and junction temperatures were measured to be 80.47℃, 85.58℃, respectively. CFD analysis showed that thermal dissipation performance of LED lighting engine A were improved than LED lighting engine B in terms of thermal image surface temperature distribution and thermal resistance. The weight of LED lighting engine A was reduced by 45% compared to the LED lighting engine B.
증례 : 소화기 ; 간세포암 치료로 고주파열치료 시행 후 발생한 간대장누공 1예
강민규 ( Min Gyu Kang ),이태희 ( Tae Hee Lee ),나운태 ( Woon Tae Na ),정지현 ( Ji Hyun Jeong ),임동혁 ( Dong Hyuk Lim ),이만 ( Mahn Lee ),강영우 ( Young Woo Kang ) 대한내과학회 2012 대한내과학회지 Vol.83 No.4
Radiofrequency ablation (RFA) is a relatively safe therapy for patients with hepatocellular carcinoma (HCC); however, complications are not unknown. A hepatocolic fistula is a rare complication after RFA. We report a case of a hepatocolic fistula following a liver abscess after RFA for HCC in a 58-year-old male. The patient was diagnosed with HCC and liver cirrhosis from hepatitis B infection 3 years prior to admission. The HCC was in segment 6 of the liver and was treated with transarterial chemoembolization and RFA. One month after the second RFA, he was diagnosed with a liver abscess, for which he was treated with antibiotics for 2 months, but continued to have intermittent fever and chills. We made a diagnosis of hepatocolic fistula using colonoscopy, fluoroscopy, and liver dynamic computed tomography. The patient underwent a surgical procedure after antibiotic therapy. Although a hepatocolic fistula is a rare complication following RFA, clinicians should be aware of its existence. (Korean JMed 2012;83:480-484)
강민규 ( Kang Min-gyu ),조광일 ( Cho Kwang-il ),정영수 ( Jeong Young-soo ),김인태 ( Kim In-tae ),안진희 ( Ahn Jin-hee ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
To ensure the safety of weathering steel structures, it is important to evaluate the time-dependent corrosion behavior. Thus, progress and effect of corrosion damage on weathering steel members should be evaluated, but predicted corrosion depth do not go far enough until now, which is affected by the corrosion environment. In this study, the corrosion resistant of weathering steel was examined to quantifiably investigate and compare the corrosion depth of carbon and weathering steel.
증례 : 소화기 ; 급성 A형 간염 산모에서의 신부전, 췌장염 및 태아의 사산 1예
강민규 ( Min Gyu Kang ),이태희 ( Tae Hee Lee ),박정호 ( Jung Ho Park ),최인기 ( In Kee Choi ),선제형 ( Jae Hyung Sun ),천상열 ( Sang Lyeol Cheon ),강영우 ( Young Woo Kang ) 대한내과학회 2010 대한내과학회지 Vol.78 No.5
급성 A형 간염은 간외 합병증이 적고 저절로 좋아지는 질환으로 일반적으로 인식하고 있다. 그러나 최근 관절염, 혈관염 급성 신부전, 전격성 간부전, 췌장염 등의 전신 합병증이 많이 보고되고 있다8). 비전격 A형 간염에서 본 증례와 같이 급성 췌장염, 신부전 및 사산 등 여러 합병증이 병발하는 경우가 드물어 이를 문헌고찰과 함께 보고하고자 한다. The incidence of hepatitis A has increased sharply in Korea, and cases have been associated with many complications. We report a pregnant woman who developed acute renal failure, acute pancreatitis, and stillbirth associated with hepatitis A. She had no relevant medical history. She was admitted to hospital with vaginal bleeding, fever, and myalgia. The initial laboratory data and clinical findings were compatible with acute hepatitis, renal failure, and pancreatitis. To the best of our knowledge, this is the first case report of non?fulminant hepatitis with multiple complications in Korea. (Korean J Med 78:620-623, 2010)