고도근시에서 시신경유두주위 위축 범위에 따른 빛간섭단층촬영의 녹내장 진단력 비교

김우진,김경남,김창식,Woo Jin Kim,Kyung Nam Kim,Chang Sik Kim 대한안과학회 2013 대한안과학회지 Vol.54 No.12

Purpose: To evaluate diagnostic power to detect glaucoma in high myopic eyes with peripapillary atrophy among optical coherence tomography (OCT) parameters. Methods: Fifty eyes of 31 glaucoma patients with myopia of -6.00 diopters or less and a peripapillary atrophy (PPA) were classified into a group with a PPA located beyond the circumpapillary OCT scan circle (group A) and a group with a PPA confined within the scan circle (group B). Circumpapillary retinal nerve fiber layer (cpRNFL), total macula (TM), and ganglion cell-inner plexiform layer (GCIPL) thickness were measured in each group and the diagnostic power of each measurement was compared by area under the receiver operating characteristic curve (AUC). Results: There were no significant differences in the age, gender, intraocular pressure, optic disc size, and mean deviation between the 2 groups. The spherical equivalent of group A was significantly larger than group B (mean -11.9 vs. -7.3 diopters, p = 0.002). In group A, the AUC of average GCIPL thickness was significantly higher than average cpRNFL and average TM thickness (p < 0.05). Additionally, when comparing parameters that showed the highest AUC value in each method, the AUC of GCIPL thickness was significantly higher than cpRNFL thickness (p = 0.046). In subgroup analysis of spherical equivalent matching between the 2 groups (subgroup A and B), the highest AUC value of GCIPL thickness was significantly higher than cpRNFL and TM thickness in subgroup A (p < 0.05). In group B and subgroup B, there was no statistical significance among AUC values of the 3 different methods (p > 0.05). Conclusions: Assessment of GCIPL parameters is a useful technique for glaucoma diagnosis in patients with high myopia and PPA extending beyond circumpapillary OCT scan circle. <br /> J Korean Ophthalmol Soc 2013;54(12):1844-1855

Genetic Relationships of Four Korean Oysters Based on RAPD and Nuclear rDNA ITS Sequence Analyses

김우진,이정호,김경길,김영옥,남보희,공희정,정현택,Kim, Woo-Jin,Lee, Jeong-Ho,Kim, Kyung-Kil,Kim, Young-Ok,Nam, Bo-Hye,Kong, Hee-Jeong,Jung, Hyung-Taek The Malacological Society of Korea 2009 The Korean Journal of Malacology Vol.25 No.1

Random amplified polymorphic DNA (RAPD) marker and sequence analyses of the internal transcribed spacer (ITS) region of ribosomal DNA were used to assess phylogenetic relationships of four Korean oyster species. The average number of species-specific markers identified from five universal rice primers (URPs) by RAPD-PCR was 1.8 for Crassostrea gigas, 3.2 for C. nippona, 3.6 for C. ariakensis, and 4.6 for Ostrea denselamellosa. The length of the ITS (ITS1-5.8S-ITS2) region ranged from 1,001 to 1,206 bp (ITS1, 426-518 bp; 5.8S, 157 bp; and ITS2, 418-536 bp), while the GC content ranged from 55.5-61.1% (ITS1, 56.8-61.8%; 5.8S, 56-57.3%; and ITS2, 54.1-62.2%). A phylogenetic analysis of the oysters based on our RAPD, ITS1, and ITS2 sequence data revealed a close relationship between C. gigas and C. nippona and a distant relationship between the genera Crassostrea and Ostrea. Our results indicated that RAPD and ITS sequence analysis was a useful tool for the elucidation of phylogenetic relationships and for the selection of species-specific markers in Korean oysters.

황산화 배소법에 의한 구리성분의 선택적 침출연구

김우진,김준수,김명준,이진영,신선명,Kim, Woo Jin,Kim, Joon Soo,Kim, Myong Jun,Tran, Tam,Lee, Jin-Young,Shin, Shun-Myung 한국자원리싸이클링학회 2016 資源 리싸이클링 Vol.25 No.5

본 연구는 호주산 저품위 동광의 선광실험결과로 얻은 고품위 광물의 황산화 배소 및 선택적 침출반응 조건 확립을 통해 유가 광물 중에 함유된 성분을 선별적으로 용해해냄으로써 철 성분을 비롯한 불순물을 줄이거나, 동 및 니켈 성분을 용해 혹은 잔사에 잔류시킴으로써 유가금속회수를 효과적으로 회수하고자 하는데 목적이 있다. 본 연구실험결과 얻은 최적조건은 황산화 배소시 $450^{\circ}C$, $Na_2SO_4$ 2 mole ratio 및 1.5 h이었고, 배소산물의 침출온도는 상온 및 침출제는 $H_2O$ 혹은 1M $H_2SO_4$이었다. 최적조건 하에서 Cu 성분은 90 wt.% 침출율을 Fe성분은 20 wt.%내외, Ni성분은 15 wt.% 정도를 나타내는 것으로 보아 선택적 분해침출이 가능하다. This study were carried out sulfation roasting and selective leaching test for the effective recovery of copper component in concentrate obtained by froth floatation of Autrallian low grade copper ore. The optimum conditions of sulfation roasting were temp. $450^{\circ}C$, $Na_2SO_4$ 2 mole ratio and time 1.5 h, and then selective leaching were room temperature and $H_2O$ or 1M $H_2SO_4$ solutions. Leaching efficiency of optimum sulfation product were 90 wt.% of copper, 20 wt.% of iron and 15wt.% of nickel elements. In this results, it was possible to selective decomposition leaching of the copper component under optimum conditions in this research.

고온초전도 직류 케이블용 절연재료인 PPLP의 직류 및 임펄스 절연 특성

김우진,방만식,김해종,조전욱,김상현,Kim, Woo-Jin,Pang, Man-Sik,Kim, Hae-Jong,Cho, Jeon-Wook,Kim, Sang-Hyun 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.7

To realize the high-Tc superconducting (HTS) DC cable system, it is important to study not only high current capacity and low loss of conductor but also optimum electrical insulation at cryogenic temperature. A model HTS DC cable system consists of a HTS conductor, semi-conductor, cooling system and insulating materials. Polypropylene laminated paper (PPLP) has been widely adopted as insulating material for HTS machines. However, the fundamental insulation characteristics of PPLP for the development of HTS DC cable have not been revealed satisfactorily until now. In this paper, we will discuss mainly on the breakdown characteristics of 3 sheets PPLP in liquid nitrogen ($LN_2$). The characteristics of the diameter, location of butt-gap, distance between butt-gap length, pressure effect, polarity effect under DC and impulse voltage were studied. Also, the DC polarity reversal breakdown voltage of mini-model cable was measured in $LN_2$ under 0.4 MPa.

수산 김우진의 희곡에 나타난 젠더정치학

김우진(Kim, U-Jin) 고려대학교 한국학연구소 2015 한국학연구 Vol.52 No.-

본고는 젠더정치학의 관점에서 수산 김우진의 희곡을 분석한다. 젠더는 가부장제라는 오랜 지배 이념과 연관관계에 있다. 또한 젠더는 사회적으로 구성되는 것이므로 젠더에 대한 연구는 사회구조와 무의식 그리고 이를 만들어내는 권력에 대한 탐구이다. 수산의 희곡 「두데기 시인의 환멸」은 봉건적 부조리에 대한 저항의 일환으로 주체적 인식에 이르는 서사를 구성한다. 남성(적)주체에 의한 여성 혐오의 메커니즘은 성적, 계급적으로 이중의 억압을 겪어야 했던 여성들의 폐해와 각성이 주를 이룬다. 수산이 형상화 한 여성인물은 피해자의 위치에 머물지 않고 적극적으로 비판하고 저항한다. 이는 개인의 문제를 넘어 윤리와 도덕으로 덧칠된 기존의 관행에까지 저항하기에 진보적이며, 나아가 배타적 섹슈얼리티에 대한 저항 및 주체적 감정과 섹슈얼리티에 대한 솔직함은 시대적 상황을 감안할 때 상당히 급진적이다. 당대 조선에서의 가부장제 이념은 완고한 것이었지만, 수산은 페니스 파시즘의 전복 가능성을 헤게모니적 희극화로 표현함을 통해 기존의 가부장제도 내의 페니스 파시즘 속에서는 사랑과 결혼도 식민지 점령이 될 수 있으며 타자를 식민화 하지 않는 관계를 위해서는 새로운 패러다임이 필요함을 피력한다. 이는 실패한 남성(적)주체 인물상을 통해 가부장적인 가정으로 유폐되지 않기 위해서는 여성의 자각과 더불어 남성(적)주체의 인식변화가 요구된다는 담론을 내포한다고 할 수 있다. This paper analyzes the drama of Susan Kim Woo-jin from the perspective of gender politics. Gender is an old association with the dominant ideology of patriarchy. In addition, because gender is socially constituted the study of gender is also a quest for the power structure of society and the unconscious, and it produces. Gender politics that involves the “Dudegisiineuihwanmyul (disenchantment of the dudegi poet)” drama of Susan constitute a narrative leading to subjective awareness as part of the resistance against the feudal absurdities. Misogyny by the mechanism of male subjects is the main content that women who undergo abuses and oppression in sexual and class. Susan’s female characters who are actively shaping don’t stay in the position of the victim but to resist and critical. Beyond the individual problems, this is far advanced for resistance existing practices with morality and ethics. Considering the contemporary situation, such candor about his feelings and sexuality that are resistant to the exclusive shaping of adultery sexuality is fairly radical. Although patriarchal ideology was obstinate in Joseon era, susan made assertion that even love and marriage in the existing patriarchal of penis fascism can be a colonial occupation by the expression through hegemony enemy comic story of possible overthrow of penis fascism, so new paradigm is needed for relationships that do not colonize others. in order not to confine patriarchal-home through the fail of patriarchal male subjects figure, women’s awareness with changing perception of masculine subjective may be required.

Ti 첨가강의 Ti와 C 함량에 따른 초기 오스테나이트 입도 변화

김우진,강남현,도형협,김성주,남대근,조경목,Kim, Woo-Jin,Kang, Nam-Hyun,Kim, Sung-Ju,Do, Hyung-Hyup,Nam, Dae-Geun,Cho, Kyung-Mox 한국재료학회 2011 한국재료학회지 Vol.21 No.4

Prior austenite grain size plays an important role in the production of high strength hot-rolled steel. This study investigated the effect of Ti and C contents on the precipitates and prior austenite grain size. Steel with no Ti solutes had prior austenite grain size of about 620 ${\mu}m$. The addition of Ti ~ 0.03 wt.% and 0.11 wt.% reduced the prior austenite grain size to 180 ${\mu}m$ and 120 ${\mu}m$, respectively. The amount of Ti required to significantly decrease the prior austenite grain size was in the range of 0.03 wt.%. However, the amount of carbon required to significantly decrease the prior austenite grain size was not present from 0.04 wt.% to 0.12 wt.%. Oxides of Ti ($Ti_2O_3$) were observed as the Ti content increased to 0.03 wt.%. The specimen containing 0.11 wt.% of Ti exhibited the complex carbides of (Ti, Nb) C. The formation of Ti precipitates was critical to reduce the prior austenite grain size. Furthermore, the consistency of prior austenite grain size increased as the carbon and Ti contents increased. During the reheating process of hot-rolled steel, the most critical factor for controlling the prior austenite grain size seems to be the presence of Ti precipitates.

Hot-Air Forming of Al-Mg-Cr Alloy and Prediction of Failure Based on Zener-Holloman Parameter

김우진,W. Y. Kim,H. K. Kim 대한금속·재료학회 2010 METALS AND MATERIALS International Vol.16 No.6

The microstructure of an Al-Mg-Cr alloy tube fabricated through indirect extrusion at 673 K showed elongated grains with a mean size of ~26 μm. The strain rate-stress relationship at high temperatures (753 K to 793K) revealed that dislocation climb creep was the rate-controlling deformation mechanism. The hot-air forming process was successful at a pressure of 70 bar. The Zener-Hollomon parameter based failure criterion was 3602+, and was used to explain the failure behavior of a deforming body. The forming and fracture behavior of the Al-Mg-Cr alloy tube was analyzed with the aid of finite element (FE) simulation, into which the failure criterion was incorporated. Comparison of the simulation and the experimental results indicated that the proposed fracture criterion was useful in predicting the fracture behavior of aluminum tube deforming by means of gas pressure.

누소관 열상 환자에서 누소관 성형술의 해부학적 및 기능적 성공요인의 분석

김우진,안민.Woo Jin Kim. MD. Min Ahn. MD. PhD 대한안과학회 2011 대한안과학회지 Vol.52 No.3

Purpose: To identify risk factors influencing the anatomical and functional outcomes of canaliculoplasty in canalicular laceration patients. Methods: A retrospective investigation of 122 eyes of 122 patients diagnosed with canalicular laceration and treated in our hospital from January 2000 to October 2008 was conducted. Sex, age, cause and location of laceration, combined injury, preoperative duration, combined operation, duration of follow-up, and anatomical and functional outcomes of canaliculoplasty were investigated. Results: The mean age of the 122 patients was 41.2 years; 102 (83.6%) were men, and 20 (16.4%) were women. The most common cause and combined injury of laceration was sharp object Injury (20.5%) and orbital wall fracture (14.7%). No statistically significant correlation was found between pretreatment duration, duration of silicone tube insertion, and anatomical outcome. The causes of decreasing functional outcome of canaliculoplasty were traumatic facial nerve palsy, cicatrical entropion and ectropion, and partial canalicular obstruction. Conclusions: Repair of a combined eyelid injury close to the normal anatomical structure is an important factor for increasing the functional outcome. J Korean Ophthalmol Soc 2011;52(3):261-265

2×2 서브블록에서 최소/최대값을 이용한 가역 정보은닉기법 연구

김우진,김평한,이준호,정기현,유기영,Kim, Woo-Jin,Kim, Pyung-Han,Lee, Joon-Ho,Jung, Ki-Hyun,Yoo, Kee-Young 대한전자공학회 2014 전자공학회논문지 Vol.51 No.4

본 논문에서는 하나의 서브블럭내에서 픽셀값정렬과 예측오차확장기법을 확장한 새로운 가역 정보은닉기법을 제안한다. 각 $2{\times}2$ 서브블록에서 최소값 그룹과 최대값 그룹으로 나누고, 최소값 그룹에서는 제일 작은 값에 비밀자료를 숨기고, 최대값 그룹에서는 제일 큰 값에 비밀자료를 숨긴다. 제안한 알고리즘은 평균 13,900 비트의 삽입용량을 가지는데 이 결과는 31.39dB의 시각적인 왜곡을 유지하면서 기존 알고리즘보다 4,553 비트 더 많이 숨길 수 있음을 실험을 통해서 보여주고 있다. A novel reversible data hiding method using pixel value ordering and prediction error expansion in the sub-block is resented in this paper. For each non-overlapping $2{\times}2$ sub-block, we divide into two groups. In the min group, the lowest value is changed to embed a secret bit and the highest value is changed in the max group. The experimental results show that the proposed method achieves a good visual quality and high capacity. The proposed method can embed 13,900 bits on average, it is higher 4,553 bits than the previous method and the visual quality is maintained 31.39dB on average.

백내장 수술 후 발생한 안내염 환자에 관한 8년간의 고찰

김우진,권의용,이동욱,조남천,Woo Jin Kim,Eui Yong Kweon,Dong Wook Lee,Nam Chun Cho 대한안과학회 2008 대한안과학회지 Vol.49 No.11

Purpose: To estimate the annual incidence rate, evaluate any changes, analyze the microbiologic spectrum of infecting organisms, antibiotic susceptibility, and factors associated with visual outcomes of postoperative endophthalmitis following cataract surgery over an 8-year period. Methods: A retrospective investigation of direction, sex, age, culture results, interval duration, and initial visual acuity of 29 patients with endophthalmitis following cataract surgery was conducted from January 2000 to December 2007. The study was divided into two 4-year periods, with patients categorized into either Group 1 or 2. Results: The incidence rate was 0.359%, the major infective organism was Staphylococcus epidermidis, and no significant change was observed during the 8-year period. Vancomycin retained efficacy in all cases, but increased resistance occurred with ciprofloxacin during the 8 years. Increased visual acuity after treatment was greater in Group 2 and the interval from onset of ocular symptoms to ophthalmic consultation was shorter in Group 2, although a statistical significance was not demonstrated. Conclusions: Vancomycin remains effective for patients with endophthalmitis following cataract surgery. Patients who initially had good visual acuity showed greater improvement. However, sex, age, or whether or not the patients had a vitrectomy operation, were not statistically significant factors in the improvement of visual acuity. J Korean Ophthalmol Soc 2008;49(11):1771-1778