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>

Surgical technique for single-port laparoscopy in huge ovarian tumors: SW Kim`s technique and comparison to laparotomy

( Jeong Sook Kim ),( In Ok Lee ),( Kyung Jin Eoh ),( Young Shin Chung ),( Inha Lee ),( Jung-yun Lee ),( Eun Ji Nam ),( Sunghoon Kim ),( Young Tae Kim ),( Sang Wun Kim ) 대한산부인과학회 2017 Obstetrics & Gynecology Science Vol.60 No.2

Objective This study aimed to introduce a method to remove huge ovarian tumors (≥15 cm) intact with single-port laparoscopic surgery (SPLS) using SW Kim`s technique and to compare the surgical outcomes with those of laparotomy. Methods Medical records were retrospectively reviewed for patients who underwent either SPLS (n=21) with SW Kim`s technique using a specially designed 30×30-cm2-sized 3XL LapBag or laparotomy (n=22) for a huge ovarian tumor from December 2008 to May 2016. Perioperative surgical outcomes were compared. Results In 19/21 (90.5%) patients, SPLS was successfully performed without any tumor spillage or conversion to multi-port laparoscopy or laparotomy. There was no significant difference in patient characteristics, including tumor diameter and total operation time, between both groups. The postoperative hospital stay was significantly shorter for the SPLS group than for the laparotomy group (median, 2 [1 to 5] vs. 4 [3 to 17] days; P<0.001). The number of postoperative general diet build-up days was also significantly shorter for the SPLS group (median, 1 [1 to 4] vs. 3 [2 to 16] days; P<0.001). Immediate post-operative pain score was lower in the SPLS group (median, 2.0 [0 to 8] vs. 4.0 [0 to 8]; P=0.045). Patient-controlled anesthesia was used less in the SPLS group (61.9% vs. 100%). Conclusion SPLS was successful in removing most large ovarian tumors without rupture and showed quicker recovery and less immediate post-operative pain in comparison to laparotomy. SPLS using SW Kim`s technique could be a feasible solution to removing huge ovarian tumors.

Disruption of rsmA Gene of Pectobacterium carotovorum subsp. carotovorum LY34 and Effect on Pathogenicity

Kim, Min Keun,Kang, Tae Ho,Kim, Sung Kyum,Jeong, Yu Seok,Yun, Han Dae,Kim, Hoon The Korean Society for Applied Biological Chemistr 2012 Applied Biological Chemistry (Appl Biol Chem) Vol.55 No.6

The rsmA gene was cloned from soft-rot bacterium Pectobacterium carotovorum subsp. carotovorum LY34 (Pcc LY34), and its role in pathogenicity was investigated by marker exchange mutagenesis. From a cosmid library of Pcc LY34 genomic DNA, a positive clone carrying the rsmA gene was selected, and the gene was cloned by polymerase chain reaction (PCR) amplification. The gene is 186 bp in size and encodes a protein of 62 amino acids with a predicted molecular mass of 6,839 Da. The calculated pI of the RsmA is 8.16. The phylogenetic tree showed that the RsmA of Pcc LY34 appeared genetically identical to the CsrA of Pectobacterium atrosepticum SCRI1043 (100% identity) and similar to the CsrA of Yersinia pestis KIM10+(98.3%). The gene was disrupted by the $Km^r$ gene, and the cells became mutated (i.e., $RsmA^-$ mutant). The pathogenicity test revealed that the disease rating of the $RsmA^-$ mutant only differed slightly from that of the wild type on a slice of potato tuber and a Chinese cabbage stalk. These results suggest that RsmA is not an essential factor for the pathogenicity of Pcc LY34 and that the rsmA gene of Pcc LY34 is not completely derepressed in the $RsmA^-$ mutant for virulence-related genes, contrary to the results of Erwinia carotovora subsp. carotovora $RsmA^-$ mutant, which proved hypervirulent for celery petioles. These results showed that the microenvironmental conditions of the host and/or strain of pathogen are important for the coordination of virulence gene expression.

Restoration Project of Heumgyeonggak-nu (欽敬閣漏) in the King Sejong Era

Sang Hyuk Kim,Yong-Hyun Yun2,Byeong-Hee Mihn,Seon Young Ham,Kyung Ha Lee,Dae-Sik Yoon,Go-Eun Choi,Ho-Chul Ki,Myung-Kyoon Yoon 한국천문학회 2017 天文學會報 Vol.42 No.2

수학자 보재 이상설(李相卨)의 근대자연과학 수용 -『백승호초(百勝胡艸)』를 중심으로-

이상구 ( Sang Gu Lee ),박종윤 ( Chong Yun Park ),김채식 ( Chae Sik Kim ),이재화 ( Jae Hwa Lee ) 한국수학교육학회 2013 수학교육논문집 Vol.27 No.4

본 논문은 한국 근대수학교육의 아버지 이상설(李相卨, 1870-1917)이 자연과학―물리학―에 기여한 내용을 다루고있다. 이상설은 ?수리(數理)?를 쓴 시기를 전후하여, 같은 시기에 붓으로 총 8면에 걸쳐 『백승호초(百勝胡艸)』라는이름의 고전물리학 원고를 써서 남겼다. 분석결과 이 책의 원전은 1879년에 동경제대 의학부 교재로 발간된 『물리학(物理學)』이다. 이상설은 『백승호초』에서 먼저 개념을 정의하고, 일상에서 나타난 대표적 현상을 선록하여 한문으로번역하였고, 『물리학』의 전체 분량에서도 특히 ‘통유성(通有性)’에 중점을 두고 설명하였다. 동양에서 서양의 수리과학이 들어와야만 말할 수 있는 ‘질량보존의 법칙’, ‘타성(惰性, 관성)’과 같은 고전물리학의 중요개념을 포함하는 내용이 19세기 말에 이미 이 책에 소개된 것으로 보아 이상설은 당대의 다른 저술에서 보기 힘들 정도로 당시 일반물리학의 최고수준의 원서를 통해 최신 정보를 수용하고 전파하기 위하여 노력하였음을 볼 수 있다. Sang-Seol Lee(1870-1917) wrote a manuscript BaekSeungHoCho(百勝胡艸) in the late 19th century. BaekSeungHo-Cho was transcribed in classical Chinese from the 1879 Japanese book Physics(物理學) by Teizo Ihimori (1851-1916). Sang-Seol Lee, a famous independence activist, is also called Father of the Modern Mathematics Education of Korea,because of his early contribution to the modern mathematics education in the 19th century. In this paper, we introduce contents of his manuscript BaekSeungHoCho for the first time and discuss the significance of this book. Also, we show his constribution on the introduction to modern physics in the late 19th century Korea.

An introduction to the recently excavated Chunggang Medical Records and research on their medical value

Kim, Nam-Il,Yun, Seng-Yick,Hong, Sae-Young,Ahn, Sang-Woo,Cha, Wung-Seok Kyung Hee Oriental Medicine Research Center 2007 Oriental pharmacy and experimental medicine Vol.7 No.2

This study is a report on recently discovered medical records based on traditional medicine in the 1900s. First, the contents of the records and their significance are described in detail. Next, a simple example of the research follows, in order to explain the medical and historical significance the records contain and to answer the question of how this historical document can contribute to future medical and historical studies. The documents dealt with in this study, the Chunggang Medical Records, are medical records compiled by a Korean doctor of oriental medicine by the name of Younghun Kim who practiced in the center of Seoul for a period of over 60 years. The records, which eventually amounted to over 1,500 books, were made known to the academic world when the descendents recently donated them to Kyunghee University. The reason these medical records attract so much attention from academic circles, even though they are the work of one individual, is that they contain abundant information on general public medical health at the time, in addition to the fact that Kim Younghun was a well known figure among Oriental Medicine doctors in Korea. The medical records start in 1915 and continue until Kim Younhun's death in 1974, though they have some damaged or missing parts. Kim's medical records are a gold mine not only for scholars studying the medical history of the early 1900s, but also for doctors trying to emulate the techniques embedded in a great predecessor's medical practice.

Effect of Hydride Reorientation on Delayed Hydride Cracking In Zr-2.5Nb Tubes

Yun Yeo Bum,Kim Young Suk,Im Kyung Soo,Cheong Yong Moo,Kim Sung Soo Korean Nuclear Society 2003 Nuclear Engineering and Technology Vol.35 No.6

The objective of this study is to investigate the reorientation of hydrides with applied stress intensity factor, the peak temperature and the time when to apply the stress intensity factor in a Zr-2.5Nb pressure tube during its thermal cycle treatment. Cantilever beam (CB) specimens with a notch of 0.5 mm in depth made from the Zr-2.5Nb tube were subjected to electrolytic hydrogen charging to contain 60 ppm H and then to a thermal cycle involving heating to the peak temperature of either 310 or $380^{\circ}C$, holding there for 50 h and then cooling to the test temperature of $250^{\circ}C$. The stress intensity factor of either 6.13 or $18.4\;MPa\sqrt{m}$ was applied at the beginning of the thermal cycle, at the end of the hold at the peak temperatures and after cooling to the test temperature, respectively. The reorientation of hydrides in the Zr-2.5Nb tube was enhanced with the increased peak temperature and applied stress intensity factor. Furthermore, when the CB specimens were subjected to $18.4\;MPa\sqrt{m}$ from the beginning of the thermal cycle, the reoriented hydrides occurred almost all over the Zr-2.5Nb tube, surprisingly suppressing the growth of a DHC crack. In contrast, when the CB specimens were subjected to the stress intensity factor at the test temperature, little reorientation of hydrides was observed except the notch region, leading the Zr-2.5Nb to grow a large DHC crack. Based on the correlation between the reorientation of hydrides and the DHC crack growth, a governing factor for DHC is discussed along with the feasibility of the Kim's DHC model.

강유전 박막에서의 분극역전과정 예측

김상주(Sang-Joo Kim),신준호(Joonho Shin),김윤재(Yun-Jae Kim) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.3

A two-dimensional finite element model for polarization switching in ferroelectric materials developed by Kim and Jiang<SUP>(1)</SUP> and Sang-Joo Kim<SUP>(2)</SUP> is used to predict the formation of domains in a ferroelectric thin film. Initially the ferroelectric film is poled upward and the bottom electrode is grounded. A strong downward de field is imposed on a point of the top surface of the film. A region of switched domains with downward polarization is nucleated and is grown with time. It is found that initially the shape of the nucleated domains is that of a bulgy dagger, but later it turns into the shape of a reversed cup with the lower part wider than the upper part. It can also be concluded that the size of nucleated domains increases with the period of applied electric potential. The present results are qualitatively consistent with experimental observations.

YMCA 체육의 역사적 함의

김영훈(Kim, Young-hun),장성호(Jang, Sung-Ho),박윤기(Park, Yun-Ki) 용인대학교 무도연구소 2012 武道硏究所誌 Vol.23 No.1

이 연구는 역대 YMCA 체육을 토대로 하여 구체적으로 살펴보고자 한다. 이에관해 생활체육 활성화 방안 모색을 제시하는데 논의 및 결론을 도출하였다. 이는 다음과 같이 확인할 수 있다. 첫째, 한국에서의 YMCA운동은 1899년 경성에서 선교활동을 시작되었다. 둘째, YMCA의 전인교육정신인 지(智)·덕(德)·체(體)의 정신과 통하는 정신으로서 비폭력, 민주주의의 실천교육과 상통하는 정신이었다. 셋째, 이상재의 교육사상은 인간의 본질적인 면에 치중하여 올바른 인격체로 양성하는 것으로 지·덕·체의 전인적 교육이었음 알 수 있었다. 넷째, 서울 YMCA의 창립과 역사적 배경을 보면 서울YMCA는 1903년 10월 28일 창립하였다. 다섯째, 서울YMCA를 도입, 회원들에게 지도한 스포츠로는 야구, 농구, 배구, 축구, 유도, 검도, 체조 등이 있었다. 이상과 같이 종합해 볼 때, 역대 YMCA 체육의 역사에서 보이듯이 그 정책을 통해 한국생활체육의 활성화를 위한 방안 모색에 따른 정체성을 제시할 수 있는 것이다. This research is looked at concretely is based on the generation of YMCA physical training. It derive a discussion and conclusion to grope a plan to activate living physical training. This can be confirmed by the following essay. First, the YMCA exercise in Korea started in Gyeong-sun, 1899 as a missionary activity. Second, the mind of former education of YMCA’s just·morality·formality was a mind connected to the communicating with anti-violence, democratic practice education. Third, Lee Sang-Jea’s educational method is to bring up the personality to the right side valued on true nature of a human being, which indicates that his educational method is for the whole man. Fourth, looking at the foundation and historical backround, Seoul YMCA was established on 28th October 1903. Fifth, sports that Seoul YMCA guided to members were baseball, basketball, volleyball, football, judo, kendo, gymnastics etc. To round up all the above statements, the identity following a plan to activate Korea living P.T can be derived through the policy as seen in YMCA physical training’s history in generations.

강증산(姜甑山)의 이상사회론(理想社會論)과 '천지공사(天地公事)'

김성윤 ( Kim Sung Yun ) 부경역사연구소 2000 지역과 역사 Vol.- No.7

Kang Jeung-san(1871-1909) was a leading figure of religious activists in the end of Joseon dynasty. His activities was chiefly worked in the Jeollado(全羅道) province. Ideal-Society theory(理想社會論) was developed by him from the traditional Hucheon-Gaebyeok theory(後天開闢論). It was a theory which divide the history of this planet between one fifty thousand years(before-Heaven:先天) and the other fifty thousand(after-Heaven:後天). After-Heaven opened, Gaebyeok was a radical natural and socio-political transformation and a ideal society. The establishment of this ideal society, Cheonji-Gongsa(works of recreation for heaven and earth:天地公事) would be accomplished by him, the power of Lord of universe, said Kang. According to him, global history go though three stages of transformation, in the final stage would be Korea a core place of birth of the new order. The ideas of Cheonji-Gongsa were consisted of Wonsi-Banbon(return to the root of civilization:原始返本), Hae-won(pay off old scores:解寃), Sang-saeng(creative harmony:相生), Bo-un(repay for favour:報恩). Kang's vision was a kind of paradise on the earth, which was a society with live and let live. In other words, A harmonious society with social and sexual equality, improved human ability, human being serviced by gods, highly advanced great universal world. The merits of Kang's Ideal Society theory was following: the syntheses of traditional Asian values, ideals of Confucianism and Buddhism and Taoism, Christianity and modern scientific knowledge, traditional Shamanism, nationalism and cosmopolitanism; the transcen- dence of conflict between spirit and flesh; the solution of social conflicts; accomplishment of humanism; combination of Utopianism and Mesianism. Short, Kang's Ideal Society theory was the best one of ideal society theories in traditional korea.