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박정일(Jung-Il Park),이행기(Haeng-Ki Lee) 한국자기학회 2012 韓國磁氣學會誌 Vol.22 No.3
We calculated the electron spin resonance (ESR) line-profile function. The line-width of single-walled carbon nanotube (SWNT) was studied as a function of the temperature at a frequency of 9.5 ㎓ in the presence of external electromagnetic radiation. The temperature dependence of the line-widths is obtained with the projection operator method (POM) proposed by Argyres and Sigel. The scattering is little affected in the low-temperature region (T < 200 K). We conclude that the calculation process presented in this method is useful for optical transitions in SWNT.
홀로그래픽 격자 형성에 대한 칼코게나이드 박막의 열처리 효과
박정일,신경,이정태,이영종,정홍배,Park, Jung-Il,Shin, Kyung,Lee, Jung-Tae,Lee, Young-Jong,Chung, Hong-Bay 한국전기전자재료학회 2003 전기전자재료학회논문지 Vol.16 No.8
We prepared the chalcogenide As$\_$40/Ge$\_$10/Se$\_$15/S$\_$35/, Se$\_$75/Ge$\_$25/ thin film. Holographic grating was formed by the He-Ne laser( λ =633 nm). Annealing at 100$^{\circ}C$ and 200$^{\circ}C$ has been used to change the optical property of chalcogenide thin films for holographic grating formation. As the results, large variation of the optical property was generated at the As$\_$40/Ge$\_$10/Se$\_$15/S$\_$35/ chalcogenide film. Diffraction efficiency of the As$\_$40/Ge$\_$10/Se$\_$15/S$\_$35/ film has been enhanced about three times
백내장 수술 후 예상시력에 대한 망막시력계의 정확성 및 유의성
박정일,오세훈,김진형,문상웅,이도형.Jung Il Park. M.D.. Sae Hoon Oh. M.D.. Jin Hyung Kim. M.D.. Sang Woong Moon. M.D.. Do Hyung Lee. M.D. 대한안과학회 2007 대한안과학회지 Vol.48 No.7
Purpose: To investigate the accuracy and usefulness of the retinal acuity meter (RAM) in predicting visual acuity after cataract surgery. Methods: We randomly selected 47 eyes from 43 patients who underwent cataract surgery in our clinic. Preoperative BCVA and 3 month postoperative BCVA were measured by the Snellen chart, and we recorded the preoperative visual acuity by RAM. We also grouped the patients according to diabetic retinopathy and preoperative BCVA 20/100. By comparing the expected visual acuity by RAM with actual postoperative BCVA values, we analyzed the accuracy of the RAM`s predictability after surgery. The cataract types and macular disease were taken under consideration when analyzing our results. Results: Of the 47 eyes in our study, the postoperative Snellen visual acuity was predictable within three lines (90.9%) in 11 eyes with diabetic retinopathy and without macular disease. In the 36 eyes without diabetic retinopathy, the postoperative Snellen visual acuity was predictable within three lines (91.6%) of the cases. In both groups, the preoperative RAM acuity and postoperative BCVA were significantly correlated (R2=0.692, R2=0.812, p<0.05). In 41 eyes with preoperative BCVA 20/100 or more, the postoperative Snellen visual acuity was highly predictable in 95.1% (R2=0.763, p<0.05). However, in 6 eyes with preoperative BCVA levels less than 20/100, the postoperative Snellen visual acuity was not predictable (66.6 %). In the patients with both nucleosclerosis and posterior subcapsular opacity and in the patients with additional cortical opacity, the postoperative BCVA differed from the preoperative RAM acuity by more than three lines on the Snellen chart. Conclusions: RAM is useful in predicting postoperative visual acuity in cataract patients, but may be unreliable in the patients with combined cataract forms or with preoperative BCVAs less than 20/100.
박정일(Park, Jung il),이문석(Lee, Mun seok),최승영(Choi, Seung Young) 한국지적정보학회 2021 한국지적정보학회지 Vol.23 No.2
본 연구는 적시성 있는 소나무재선충병 피해의심목 판독을 위해 무인항공영상을 이용하였다. 연구방법은 소나무재선충병 피해목의 광학적·형태적 패턴을 이용하여 피해의심목을 추출하고, 판독의 정확도를 분석하는 방법으로 진행되었다. 연구 결과 피해고사목에 대한 적중률은 82%로 나타났다. 재선충 피해의심목의 효과적인 조사를 위해서는 작업자의 판별 능력이 매우 중요하다. 그러나 피해의심목 판독 업무가 분석자의 개별적 판단에 의하는 것은 한계가 있다. 따라서 빅데이터와 인공지능기술을 적용한 영상분석 방식을 통해 객체를 식별하는 연구가 필요하다. In this study, unmanned aerial images were used to timely analyze suspected trees damaged by pine wilt disease. Suspected trees were extracted using optical and morphological patterns of trees damaged by pine wilt disease, and the accuracy of reading was studied. As a result of the study, the accuracy ratio of the damaged tree was 82%. For effective investigation of suspected wilt worm damage, the ability of workers to identify is very important. However, it is a limit to relying on the analyst"s judgment for the task of analyzing the suspected damage tree. Therefore, there is a need for research to identify objects through image analysis methods that apply big data and artificial intelligence technology.
朴正一(Park Jung-Il) 동북아시아문화학회 2011 동북아 문화연구 Vol.1 No.29
As a result of having considered the city area of the Japanese leased territory of Pusan I obtained the result such as the result next which I analyzed mainly on an ancient map of Pusan about open Korea period of Pusan. was enforced by a top‐down method by the then Japanese Government. I think that the form of the town is based on city structure and a grid in succession to the descent from Japanese castle town and was formed. Of course there is neither the castle nor the castle tower, but, on the other hand, I establish stem mountain god Corporation in the top of the mountain behind of the central exclusive management of the city in Japan and do it with a psychological centripetal tendency place, and the street in the city does the form of the straight line basic tone for strategic defensive purposes there not a way seen in the neighborhood of the existing Torai prefecture which there was in the neighboring. In addition, what the dark factory of the objective hue of the military demand posts you in the safe place of the city, and locate a Japanese mounting a horse corps in the border with an outside Settlement territory thinks that there is a clearly strategic intention. In addition, I am big, and the existing city area en larges even a mask of the mass on the scale with a merger on later Korea day, and combination of sea power and the land power is completed as a point binding a sea route and a land route together than the defensive purpose, but it is aimed for the military strategy that is going to enlarge penetration in the continent via a peninsula. The city area gradually understands what deepened the density ad s a place of the life of people to live in there as a point transporting such military and supplies while spreading.