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      • KCI등재후보

        SHS 공정으로 제조된 Mo<sub>x</sub>W<sub>1-x</sub>Si<sub>2</sub> 발열체의 가속수명시험과 고장분석

        이동원,이상헌,김용남,이희수,이성철,구상모,오종민,Lee,,Dong-Won,Lee,,Sang-Hun,Kim,,Yong-Nam,Lee,,Heesoo,Lee,,Sung-Chul,Koo,,Sang-Mo,Oh,,Jong-Min 한국전기전자학회 2017 전기전자학회논문지 Vol.21 No.3

        고온자전합성과 후열처리 공정으로 $Mo_xW_{1-x}Si_2$ 발열체를 제조하였다. $Mo_xW_{1-x}Si_2$ 발열체의 신뢰성을 검증하기 위해 가속수명시험을 수행하였으며, 수명시간을 Minitab 프로그램으로 추정하였다. 또한, 가속수명시험 후의 $Mo_xW_{1-x}Si_2$ 발열체의 고장분석을 전기적과 구조적 특성으로부터 수행하였다. 그 결과, $Mo_xW_{1-x}Si_2$ 발열체의 지배적인 고장 유형은 발열체 내부의 크랙 형성과 $SiO_2$ 보호층의 박리임을 확인하였다. $Mo_xW_{1-x}Si_2$ heaters were fabricated by self-propagating high-temperature synthesis (SHS) process and post sintering process. To validate the reliability of the $Mo_xW_{1-x}Si_2$ heaters, the accelerated life test (ALT) was conducted, and then lifetime to $Mo_xW_{1-x}Si_2$ heaters was estimated by using Minitab programs. Also, the failure analysis of $Mo_xW_{1-x}Si_2$ heaters after ALT was performed through electrical and structural properties. As the results, it was confirmed that the dominant failure mode of $Mo_xW_{1-x}Si_2$ heaters is the crack formation in heaters and the delamination of protective $SiO_2$ layers.

      • 한우 비육우 전업농가 시설투자한계 분석

        김재환,김상우,조원모,강희설,조영무,Kim,,Jae-Hwan,Kim,,Sang-Woo,Cho,,Won-Mo,Kang,,Hee-Seol,Cho,,Young-Moo 한국축산환경학회 1996 축산시설환경학회지 Vol.2 No.2

        The objective of this study was to estimate the investment limit in equipment capital by Capital Recovery Method. The data used was collected from 23 Hanwoo(Korean Native Cattle) farms in 1994. The necessary time for herd size expansion was average 5 years from opening(9.7 heads) to 50 heads, 4 years from 50 to 100heads, 3 years from 100 to 150 heads, and 2 years from 150 to 200 heads, respectively. It took 14 years from opening to 200 heads of herd size. The debts for fattening cattle farms were 15.2million won for the size of 50 heads, 37.1 million won for the size of 100 heads and 89.0 million won for the size 200 heads, respectively. Average rates of debt interest were 5.1 % 7.2 and 10.8, correspendingly. As the hear size increased, debt interest rates also increased due to government funds limit. The investment limits in equipment capital perfarm household were 77.7 million won for 50 heads, 135.1 for 100 heads, and 294.3 for 200 heads for 5,500 won per kg liveweight, 70.7 million won for 50 heads, 122.6 for 100 heads and 269.3 for 200 heads for 5,000 won per kg liveweight, 63.6 million won for 50 heads 110.0 for 100 heads and 244.2 for 200 heads for 4,500 won per kg liveweight.

      • KCI등재

        대한민국 임시정부(김구)의 애국가(윤치호 작사, 안익태 작곡) 국가(國歌) 제정

        김원모(Kim, Won-mo) 춘원연구학회 2018 춘원연구학보 Vol.0 No.12

        동아일보 편집국장 이광수는 1931년 이충무공 위토의 저당 채무로 경매처분을 구제하기 위하여 국민성금을 모금, 이를 구출했다. 이를 계기로 이순신 숭모사업을 벌였다. 이충무공유적보존회(윤치호)를 발족, 1871년 대원군의 서원철폐령에 의해 폐쇄된 현충사 중건사업을 추진, 1만원의 국민성금을 모아 1932년 6월 이를 완공해서 ‘현충사 중건 한글비'(정인보)를 세웠다. 이광수는 이순신의 호국정신과 항일독립정신을 고취하기 위하여 ‘이순신 순례'와 ‘충무공 행록'을 발표하고 나서 ‘이순신'을 동아일보에 연재했던 것이다. 박정희는 보통학교 시절 동아일보에 연재중인 이광수의 ‘이순신'을 읽고나서부터 이순신과 도산 안창호를 숭배하기 시작했다. 대한민국 대통령이 되고나서 1968년 광화문 네거리에 이순신 동상을 건립했고, 도산공원을 조성하고 망우리의 도산묘를 도산공원에 이장했다. 도산공원이 조성되고 나서 박흥식은 도산 동상을 건립했고 이광수의 도산묘비를 옮겨 놓았다. 현충사 성역화 사업을 일으켜 이순신의 호국정신을 기렸던 것이다. 1930년 동경음악전문학교를 졸업한 안익태는 미국으로 망명, 한인교회의 태극기가 게양되어 있는 강단에서 처음으로 애국가를 스코틀랜드 민요곡 올드랭사인곡에 맞추어 열창, 한인 교포는 울음바다가 되었다. 올드랭사인곡은 애상적인 이별곡이기에 한 나라의 국가(國歌)의 곡으로는 적합하지 않다고 절감하고 애국가를 새로 작곡하기로 결심했다. 이리하여 5년 동안 고심 작곡 끝에 1935넌에 작곡을 완성하고 신한민보(1936. 3. 26)에 애국정신에 의해 애국가를 작곡하게 된 경위를 밝히는 ‘대한국 애국가'를 발표했다. 안익태 작곡의 ‘대한국 애국가'(대한인국민회, 1936. 3. 4)를 발행했다. 일제는 ‘대한국 애국가'를 금서로 지정하고 말았다. 1936년 6월 유럽으로 진출한 안익태는 코리아환상곡을 작곡했다. 대한인국민회는 안익태 작곡의 ‘대한국 애국가'를 중경 임시정부 주석 김구에게 보내면서 국가(國歌)로 지정해줄 것을 요청했다. 이에 김구 주석은 1940년 12월 20일 안익태 작곡 애국가 사용을 허가하였고, 광복 후 ‘한국애국가'(1945. 11. 12)를 발간하면서 광복운동 중 애국가를 국가(國歌)로 지정했다고 밝히고 있다. 2006년 노무현 정부는 도산공원 조성에 직접 관련 있는 박정희․박흥식․이광수를 친일인명사전에 친일파로 등재했고, 박흥식의 도산 동상과 이광수의 도산묘비를 철거하고 말았다. 문화민족이라고 자부하고 있는 대한민국 정부가 이같은 과거문화유산을 파괴하는 반달리즘을 자행함은 중공의 문화혁명 당시의 교조적 홍위병식 정치폭거와 다를 바 없다. 특정한 정치적 패러다임이나 권력으로 수정주의적 역사해석은 모략사관에 함몰하고 만다. 친일파 청산을 이분법적 획일적 잣대로 적용해서 처단한다는 논리라면 친일파 박정희가 광화문 네거리에 세워놓은 이순신 동상을 철거해야만 하는가. 친일파 윤치호․안익태가 작사․작곡한 애국가를 폐지하고 새로 작사․작곡한 애국가를 불러야한다는 자기모순에 함몰하고 만다. Kwangsoo Lee has a sincere admiration for Yi Sun-sin. In 1931, he took the initiative in rebuilding Yi Sun-sin worship shrine in Asan. He collected the national contributions of the amount of ten thousand won and then the Hangul(Korean alphabet) monument of Admiral Yi Sun-sin which was written by Chong In-bo was erected in 1932. After Park Chong Hee, an elementary student, had read Kwangsoo Lee"s historical novel "Yi Sun-sin" in 1931 and he began to respect Yi Son-sin as a national guardian deity. The Japanese(Hideyoshi"s) invasion of Korea broke out in 1592. Admial Yi Sun-sin, Naval commander of Left Cholla Province built his famed "turtle ships"(kobuksun) with a protective covering to ward off enemy arrows and shells, and in addition, with numerous spikes implanted to prevent the enemy from boarding. Admiral Yi Sun-sin, who with the mere dozen warships remaining in his command, engaged a Japanese flotilla as it was sailing toward the Yellow Sea off Myongyang, near Mokpo, and won a resonding victory. After Park Chong Hee was inaugrated as the President of Republic of Korea, he had erected a magnificent bronze statue of Yi Sun-sin at Kwangwhamoon Square in 1968. Yi Sun-sin worship project that developed by President Park Chong Hee, was followed up his efforts to construct a holy precinct, Asan. Ai Kook Ka, the Korean National Hymn was composed by Eak Tai Ahn at Temple University, America, in 1935. "The Korean Naional Hymn" was published by the Korean National Association in 1936. Japan took immediate legal action on "The Korean National Hymn" and then designated it as a banned book in 1936. The request of singing the National Anthem(Yun Chi-Ho"s writing song and Eak Tai Ahn"s composition) in unison was approved by The Provisional Government(Kim Ku) in December 20, 1940. This National Hymn(Ai Kook Ka) was used in the Korean National Anthem by Kim Ku in Nobember 12, 1945.

      • KCI등재

        만성 C형 간염 환자에서 Gadoxetate disodium 조영 증강 MRI로 진단된 간혈관종

        모진원 ( Jin Won Mo ), 류수형 ( Soo Hyung Ryu ), 박동원 ( Dong Won Park ), 윤원재 ( Won Jae Yoon ), 김진남 ( Jin Nam Kim ), 문정섭 ( Jeong Seop Moon ), 심재찬 ( Jae Chan Shim ) 대한간암학회 2015 대한간암학회지 Vol.15 No.1

        A hemangioma is the most common benign hepatic tumor. Many hepatic hemangioma tend to be found incidentally, but should be differentiated from malignant tumors, especially in patients with a high risk for malignancy. We presented a 52-year-old woman who diagnosed as hepatic hemangioma. The patient was a chronic alcohol abuser and diagnosed as a hepatic C virus carrier for the first time. Contrast enhanced abdominal computed tomography (CT) revealed a 4cm sized hepatic mass involving both segment 5 and 6. Abdominal CT finding suggested hepatic hemangioma, but could not rule out the malignancy. Because the patient had risk factors for hepatocellular carcinoma, abdominal ultrasonography (US) was performed for further evaluation. But abdominal US also showed atypical finding. For the confirmative diagnosis, dynamic magnetic resonance imaging using gadoxetate disodium (primovist®, Bayer HealthCare, Berlin, Germany) which is the innovative liver cell-specific contrast medium was done, and the patient was diagnosed as hepatic hemangioma. (Journal of Liver Cancer 2015;15:36-40)

      • KCI등재

        SHS 공정에 의해 제조된 Mo<sub>x</sub>W<sub>1-x</sub>Si<sub>2</sub> 발열체의 열화메커니즘

        이동원,이상헌,김용남,이성철,구상모,오종민,Lee,,Dong-Won,Lee,,Sang-Hun,Kim,,Yong-Nam,Lee,,Sung-Chul,Koo,,Sang-Mo,Oh,,Jong-Min 한국전기전자재료학회 2017 전기전자재료학회논문지 Vol.30 No.10

        The degradation mechanism of $Mo_xW_{1-x}Si_2$ ultrahigh-temperature heating elements fabricated by self-propagating high-temperature synthesiswas investigated. The $Mo_xW_{1-x}Si_2$ specimens (with and without post-annealing) were subjected to ADTs (accelerated degradation tests) at temperatures up to $1,700^{\circ}C$ at heating rates of 3, 4, 5, 7, and $14^{\circ}C/min$. The surface loads of all the specimen heaters were increased with the increase in the target temperature. For the $Mo_xW_{1-x}Si_2$ specimens without annealing, many pores and secondary-phase particles were observed in the microstructure; the surface load increased to $23.9W/cm^2$ at $1,700^{\circ}C$, while the bending strength drastically reduced to 242 MPa. In contrast, the $Mo_xW_{1-x}Si_2$ specimens after post-annealing retained $single-Mo_xW_{1-x}Si_2$ phases and showed superior durability after the ADT. Consequently, it is thought that the formation of microcracks and coarse secondary phases during the ADT are the main causes for the degraded performance of the $Mo_xW_{1-x}Si_2$ heating elements without post-annealing.

      • KCI등재
      • SSCISCOPUSKCI등재
      • KCI등재SCIESCOPUS

        Social Distancing and Transmission-reducing Practices during the 2019 Coronavirus Disease and 2015 Middle East Respiratory Syndrome Coronavirus Outbreaks in Korea

        Won,Mo,Jang,Deok,Hyun,Jang,이진용 대한의학회 2020 Journal of Korean medical science Vol.35 No.23

        Background: The absence of effective antiviral medications and vaccines increased the focus on non-pharmaceutical preventive behaviors for mitigating against the coronavirus disease 2019 (COVID-19) pandemic. To examine the current status of non-pharmaceutical preventive behaviors practiced during the COVID-19 outbreak and factors affecting behavioral activities, we compared to the 2015 Middle East respiratory syndrome coronavirus (MERS-CoV) outbreak in Korea. Methods: This was a serial cross-sectional population-based study in Korea with four surveys conducted on June 2 and 25, 2015 (MERS-CoV surveys), and February 4, and April 2, 2020 (COVID-19 surveys). Of 25,711 participants selected using random digit dialing numbers, 4,011 participants (aged ≥ 18 years) were successfully interviewed, for the 2020 COVID-19 (n = 2,002) and 2015 MERS-CoV (n = 2,009) epidemics were included. Participants were selected post- stratification by sex, age, and province. The total number of weighted cases in this survey equaled the total number of unweighted cases at the national level. We measured the levels of preventive behaviors (social distancing [avoiding physical contact with others]), and practicing transmission- reducing behaviors such as wearing face mask and handwashing. Results: Between the surveys, respondents who reported practicing social distancing increased from 41.9%–58.2% (MERS-CoV) to 83.4%–92.3% (COVID-19). The response rate for the four surveys ranged between 13.7% and 17.7%. Practicing transmission-reducing behaviors (wearing face masks and handwashing) at least once during COVID-19 (78.8%, 80.2%) also increased compared to that during MERS-CoV (15.5%, 60.3%). The higher affective risk perception groups were more likely to practice transmission-reducing measures (adjusted odds ratio, 3.24–4.81; 95 confidence interval, 1.76–6.96) during both COVID-19 and MERS-CoV. Conclusion: The study findings suggest markedly increased proportions of non- pharmaceutical behavioral practices evenly across all subgroups during the two different novel virus outbreaks in Korea. Strategic interventions are needed to attempt based on preventive behavior works

      • SCIESCOPUSKCI등재
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