Evaluation of Hot Deformation and Dynamic Recrystallization Behaviors of Advanced Reduced-Activated Alloy (ARAA)

Sang‑Wook Kim,Hyeon‑Woo Son,Taek‑Kyun Jung,Young‑Bum Chun,Yi‑Hyun Park,Ji‑Woon Lee,Soong‑Keun Hyun 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.4

The hot deformation behavior of advanced reduced-activation alloy (ARAA) was investigated using hot torsion tests. Thefl ow stress decreased as deformation temperature increased and as strain rate decreased. The fl ow behavior demonstratedthe typical dynamic recrystallization (DRX). Based on the constitutive analysis of peak stress, the activation energy for hotdeformation was found to be 330.3 kJ mol −1 . Peak stress was analyzed as a function of the Zener–Hollomon parameter, andcalculated and experimental values were in good agreement. A DRX kinetic model for ARAA was derived with deformationconditions based on the Avrami-type model. It was confi rmed that the volume fraction of dynamically recrystallized grainsincreased as deformation temperature increased and as strain rate decreased. The necklace structure and grain boundarybulging were observed in the deformed microstructure of ARAA. The suggested DRX mechanism for ARAA during hotworking is discontinuous DRX.

Adult Patients with Congenital Muscular Torticollis Treated with Bipolar Release : Report of 31 Cases

Lee, Gun Sang,Lee, Myung Ki,Kim, Woo Jae,Kim, Ho Sang,Kim, Jeong Ho,Kim, Yun-Suk The Korean Neurosurgical Society 2017 Journal of Korean neurosurgical society Vol.60 No.1

Objective : We assessed the surgical results of bipolar release in 31 adult patients with uncorrected congenital muscular torticollis (CMT) and more than 12 months of follow-up. Methods : Thirty-one patients underwent a bipolar release of the sternocleidomastoid muscle (SCM) and were retrospectively analyzed. The mean follow-up period was 14.9 months (range, 12-30). The mean age at time of surgery was 30.3 years (range, 20-54). Patients were evaluated with a modified Lee's scoring system, cervicomandibular angle (CMA) measurement, and a global satisfaction rating scale using patient self-reporting. Results : The modified Lee's scoring system indicated excellent results in 4 (12.9%) patients, good in 18 (58.1%), and fair in 9 (29.0%) at the last follow-up after surgery. The improvements in neck movement and head tilt were statistically significant (p<0.05). The preoperative mean CMA was $15.4^{\circ}$ (range, 5.4-29.0), which was reduced to a mean of CMA of $6.3^{\circ}$ (range, 0-25) after surgery (p<0.05). The global satisfaction rating scale was 93.7% (range, 90-100). A transient sensory deficit on the ipsilateral lower ear lobe was noted in three cases. No significant permanent complications occurred. Conclusion : Bipolar release of the SCM is a safe and reliable technique for the treatment of CMT in adults.

Laparoscopic single-port access right adrenalectomy using lee's port : A case report

Sung Hoon Choi,Ho Kyoung Hwang,Chang Moo Kang,Woo Jung Lee 대한외과학회 2010 대한외과학회 학술대회 초록집 Vol.2010 No.11

Piezoelectric Materials: All‐Solution‐Processed Flexible Thin Film Piezoelectric Nanogenerator (Adv. Mater. 45/2012)

Chung, Sung Yun,Kim, Sunyoung,Lee, Ju‐,Hyuck,Kim, Kyongjun,Kim, Sang‐,Woo,Kang, Chong‐,Yun,Yoon, Seok‐,Jin,Kim, Youn Sang WILEY‐VCH Verlag 2012 ADVANCED MATERIALS Vol.24 No.45

<P>An all‐solution‐processed flexible piezoelectric nanogenerator, composed of polycrystalline ZnO thin film and functional polymer layers such as P3HT/PCBM and PEDOT:PSS, generates energy through a mechanical rolling and muscle stretching system. On page 6022, Youn Sang Kim, Sang‐Woo Kim, and co‐workers show that this all‐solution‐processed nanogenerator is feasible as a piezoelectric patchable device and is promising for use in future energy harvesters such as wearable human patches and mobile electronics. </P>

지역난방 공동주택의 건축물 에너지절약 설계기준 강화에 따른 난방에너지 사용량 분석

이성우(Sung一Woo Lee),정광섭(Kwang-Seop Chung),김영일(Young-Il Kim) 한국지열·수열에너지학회 2011 한국지열에너지학회논문집 Vol.7 No.2

Since 1970s, energy-saving design criteria of buildings has been improved through numerous revisions. The purpose of this research is to show how energy saving design criteria affects heating energy consumption of apartments using district heating. Heating energy consumption has been measured in 4 apartments located in Gyeonggi province, Korea from Nov. 1, 2007 through Oct. 31, 2008. Collected data was regressed to linear correlations. Heating energy consumptions were calculated for past, present and future energy-saving design criteria, which are outdoor temperature, ventilation and insulation. The results show that present design criteria has reduced heating energy consumption by 15%, and the future criteria will reduce the energy consumption by 42% compared to the criteria before 2001.

心巖 金志洙의 思想과 自決殉國

이성우(Lee, Sung-woo) 호서사학회 2015 역사와 담론 Vol.0 No.76

자결순국은 가장 적극적이고 극단적인 항일투쟁이었다. 유학자들은 일제의 침략에 맞서 자결로써 항거했다. 김지수는 일제의 은사금을 거부하고 자결한 순국지사이다. 김지수는 충남 연산출신으로 사계 김장생의 11대손이었다. 김장생은 조선 예학의 종장으로 당대 최고의 山林으로 존숭받았으며, 그의 사상은 김집, 송시열, 한원진으로 계승되었다. 따라서 김지수는 가문에 대한 자부심이 강했다. 김장생, 김집으로 이어지는 예학의 종장을 배출한 가문 출신이라는 점이다. 따라서 그의 학문은 家學인 禮學에 기반을 두고 있었다. 김지수는 族親 金永膺으로부터 많은 영향을 받았으며, 그와의 관계로 杞菊亭 講會와 亦樂齋契에 참여하면서 宋近洙ㆍ宋秉璿ㆍ宋秉珣 등과 교류하게 되었고 송시열의 사상을 습득했다. 그는 지역 유학자들과 교유하기 시작하면서 연산지역에서 학계를 조직해 유림들을 결속하고 가문의 위상을 정립하는 활동을 벌여나갔다. 이러한 활동을 기반으로 관계에 진출했으나 곧바로 사임하고 은둔자정의 길을 선택했다. 김지수는 1911년 일제가 소위 은사금을 보내오자 절명시를 남기고 자결했다. 일제에게 욕을 당하느니 차라리 정도를 지키겠다는 것이었다. 그는 김장생의 예학을 계승했고 유학의 효용성과 절대적 진리를 신봉하고 있었다. 그에게는 의리와 대의명분을 지키는 것이 바로 ‘禮’였다. 그는 자결순국으로 자신의 학문인 예학의 義理를 실천한 것이었다. 이러한 특징은 그의 문인들도 같았다. 송병선․송병순․이학순은 일제의 침략에 맞서 자결순국한 대표적 유학자이다. 송병선은 을사늑약에 항거해 자결했고 이학순과 송병순은 은사금을 거부하고 자결했다. 이들은 ‘金長生-金集-宋時烈-權尙夏-韓元震-宋能相-宋煥箕-宋穉圭’로 이어지는 기호학통을 계승하고 있었다. 따라서 자결순국을 통해 학문적 전통과 신념, 문인에 대한 의리, 유학적 가치와 질서를 지키기 위해 자결의 길을 선택했던 것이다. Kim Ji Su sacrificed his life for the country and rejected to receive the Japanese Empire’s royal bounty. He was born at Yeonsan, Chungnam Province, and a great grandson of Kim, Jang Sang. Kim, Jang Sang was a master of 예학 in Chosun and respected as a San-lim of the day. His thought was succeeded to Kim, Jip, Song, si Yeol and Han, Won Jin. Thus, Kim, Ji Su had much pride in his family and his studies was based on the Yehak Kim, Ji Su was influenced by one of his relatives, Kim, Young Woon, and interchanged experience and learned the thought of Song, Si Yeol at the Kigookjeong and Yeoklackjaekae. Interchanging experience with Confucian scholars at Yeonsan area, he was very active at organizing Confucian scholars and set up his family’s status. Through these activities, he became a government official, but resigned immediately and lived in seclusion. In 1911, when the Japanese Empire gave a royal bounty, he committed suicide leaving a poet. He succeeded Kim, Jang Sang’s Yehak, and believed in the usefulness of the Confucianism and absolute truth. For him, Ye was the fidelity, and just and great cause. He put his thought and theory into practice by committing suicide. With him, Song, Byong Sun, Song, Byong Soon, and Lee Hank Soon who succeeded Kiho School, also committed suicide against Japanese invasion. Song, Byong Sun committed suicide against the Protectorate Treaty between Korea and Japan concluded in 1905. Song, Byong Soon and Lee Hank Soon committed suicide rejecting the Japanese Empire’s royal bounty. They chose to commit suicide for their academic tradition and beliefs, fidelity to scholars, the Confucian values and order

남북한 분단체제와 신상옥의 영화

이상우(Lee Sang-Woo) 한국어문학회 2010 語文學 Vol.0 No.110

This article examine the relation between Korea’s division system and the films of Shin Sang-ok, who was one of very famous Korean film directors in the golden age of Korean cinemas. Shin Sang-ok has been maybe the only Korean director, who produced his films in two Koreas. Before he was kidnapped by North Korean kidnap gangs, he was an outstanding film director in South Korea, who produced several popular films, as like 〈A Romance Papa〉, 〈King Yeonsan〉, 〈the evergreen tree〉, 〈a guest and mother)〉, 〈the Red muffler〉, and so on. Also, He managed the biggest film company ‘Shin Film’ and the biggest film studio ‘Anyang Film Studio’ in South Korea in 1960s, he maintained to good relation with the president Park Chung-hee’s government at that time. However, as Shin criticized the film policy of Park Chung-hee’s government, especially the problem of film censorship, the conflicts between them went to worse way in 1970’s. And then Shin was kidnapped with his ex-wife a famous Korean film actress Choi Eun-hee to North Korea. Shin abd Choi stayed in there during the 8 years and produced 7 films in North Korea’s Monolithic Ideal Logical System by Kim Jung-il’s enforcement and immense supports. At that time, Shin produced several remarkable films in North Korea, as like 〈not returned the emissary〉, 〈the salt〉, 〈a story of the escape〉. Finally, Shin and Choi escaped from North Korea for obtaining the freedom to the Western world. Two Koreas’s division system brought the restriction of creative film making to a film director Shin Sang-ok.

앙코를 가다(2)

이우상 ( Woo Sang Lee ) 대진대학교 독서문화연구소 2005 독서문화연구 Vol.4 No.-

수변공원과 체육공원의 중요 속성

홍성권 ( Sung Kwon Hong ),이상우 ( Sang Woo1 Lee ),이민우 ( Min Woo Lee ),이상민 ( Sang Min Lee ) 한국환경복원기술학회 2007 한국환경복원기술학회지 Vol.10 No.6

안종화(安鍾和)의 <수학절요(數學節要)>에 대한 고찰

이상구 ( Sang Gu Lee ),이재화 ( Jae Hwa Lee ),변형우 ( Hyung Woo Byun ) 한국수학교육학회 2011 수학교육논문집 Vol.25 No.4

In 2007, a Taiwanese mathematics historian Wann-Sheng HORNG made a visit to Kyujanggak(the royal library of Joseon Dynasty) in Seoul, Korea. During this visit, he found the Korean math book An abridged version of the Joseon Mathematics (<數學節要>, Su-Hak-Jeol-Yo), which was written by Jong-Hwa AN(9 Nov 1860-24 Nov 1924) in 1882. Then he mentioned the possible importance of AN`s book in his article in the Journal Kyujanggak(vol. 32, June 2008). Jong-Hwa AN is a Korean scholar, activist of patriotism and enlightenment in the latter era of Joseon Dynasty. He passed the last examination of Joseon Dynasty to become a high government officer in 1894. The father of the modern mathematics education in Korea, Sang-Seol LEE(1870-1917) also passed the same examination with him. It is interesting that government high officer AN and LEE both wrote mathematics books in 19th century. In this talk, we now analyze this mathematics book of Joseon written in 1882.