마취법 차이에 따른 백내장 수술 후 눈꺼풀처짐의 발생 비교

김영국,문지영,김성진.Young Kook Kim. MD. Ji Young Moon. MD. Sung Jin Kim. MD 대한안과학회 2012 대한안과학회지 Vol.53 No.9

Purpose: The authors of the present study conducted a comparative analysis of procaine hydrochloride topical anesthesia and Nadbath-Rehman-Ellis akinesia to observe orbicularis oculi stress against the eyelid speculum and occurrence of postoperative ptosis. Methods: In 40 eyes of 20 patients, 1 eye underwent a cataract operation by topical anesthesia and the other eye underwent Nadbath-Rehman-Ellis akinesiaDepending on the anesthetic method, the 2 groups were evaluated to determine the difference in marginal reflex distance and levator function after the surgery. Results: There were no significant differences between the 2 groups in the mean preoperative MRD1 which was 2.5 ± 0.4 mm and levator function which was 9.0 ± 1.1 mm. After 1 week and 4 weeks, the mean MRD1 on eyes with topical anesthesia was 2.0 ± 0.3 mm and 2.3 ± 0.3 mm, respectively, and the mean MRD1 on eyes with Nadbath-Rehman-Ellis akinesia was 2.3 ± 0.2 mm and 2.4 ± 0.4 mm, respectively, which was significantly lower (p = 0.046, 0.042). The levator functions showed no significant differences. The reduction of MRD1 over 2 mm was shown only in the group with topical anesthesia which was significantly higher in comparison to the group with Nadbath-Rehman-Ellis akinesia which had none. Conclusions: In cataract surgery, Nadbath-Rehman-Ellis akinesia can reduce damage to the levator aponeurosis decreasing the occurrence of postoperative ptosis. J Korean Ophthalmol Soc 2012;53(9):1226-1230

LiYSiO₄: La 열형광체의 온도에 따른 열발광 특성

김영국,Kim, Young-Kook 한국재료학회 2009 한국재료학회지 Vol.19 No.9

The thermoluminescent phosphors of LiYSi$O_4$ containing rare earth metal(La) dopants of 1 wt.%5 wt.% were prepared, and their TL characteristics have been investigated as a function of parameters such as the doping level and the heating rate. The grain size and cooling temperature of the highly sensitive LiYSi$O_4$: La phosphors have been investigated. The glow curve of LiYSi$O_4$: La has two peaks ($P_1,\;P_2$), and the peak height ratio of the two peaks is called $P_2/P_1$; here, the main peak is $P_2$. Experimental results indicate that the peak height ratios of the glow curve for LiYSi$O_4$: La are clearly correlated with the grain size and cooling temperature. The maximum $P_2/P_1$ ratio 3.25, the maximum sensitivity was observed for a grain size between 100-150 ${\mu}m$. The intensity of the TL peak of the phosphors was linearly proportion to the dose of X-rays.

Mg₂SiO₄ 열형광체의 소결공정과 자외선 선량에 대한 TL 특성에 관한 연구

김영국,손인호,김일홍,송재흥,도시홍,강희동,Kim, Young-KooK,Shon, In-Ho,Kim, Il-Hong,Song, Jae-Heung,Doh, Sih-Hong,Kang, Hee-Dong 한국재료학회 2002 한국재료학회지 Vol.12 No.11

$Mg_2$$SiO_4$: Dy, Tb pellets were made by using a sintering process, including pressing and heat treatment. In the present study, the optimum parameters of the sintering for the $Mg_2$$SiO_4$: Dy, Tb pellets obtained such as the pressing pressure, the sintering temperature and the sintering time were in terms of thermoluminescence. Experimental results showed that the main peak of the glow curve for $Mg_2$$SiO_4$: Dy, Tb thermoluminescence dosimeter was clearly correlated with the energy of the UV and with the grain size. The intensity of the TL glow curve increased and its main peak position shifted to lower temperature with increasing UV irradiation time.

기업의 감염병 예방을 위한 BCP 강화방안 연구

김영국,정경옥,양경아,Kim, Young-Kook,Jeong, Kyung-Ok,Yang, Kyung-Ah 대한안전경영과학회 2021 대한안전경영과학회지 Vol.23 No.3

As the number of confirmed cases of Covid-19 is not decreasing, it is time for domestic companies to respond preemptively and in terms of business continuity. The purpose of this study is to present measures to strengthen BCP to prevent infectious diseases in the enterprise. In this work, three methods of data investigation are used. The first was to search for keywords in academic databases such as the National Assembly Library and the Korea Research and Information Service to investigate degree papers and academic papers. Second, we investigated literature such as research reports, manuals, and guidelines on infectious diseases. Finally, the researchers visited official websites such as KDCA, MOHW, and MOIS to collect and analyze recent data. BCP In view of the Board, a new risk analysis should be made and a disaster preparedness system tailored to the characteristics of the entity should be established. We need to analyze corporate weaknesses and focus on safety culture. It is also important to look at how customers choose their services and products. Based on this, differentiated service strategies should be presented. It is hoped that the results of this study can be used as basic data for companies that want to systematically manage and operate BCP to prevent infectious diseases.

불순물을 첨가한 $MgB_4O_7$ 열형광체의 물리적 특성에 관한 연구

김영국,손인호,채건식,이수대,설정식,노경석,송재흥,이상윤,도시홍,Kim, Young-Kook,Sohn, In-Ho,Chae, Kun-Sik,Lee, Su-Dae,Sul, Chung-Sik,Noh, Kyong-Suk,Song, Jae-Heung,Lee, Sang-Yun,Doh, Sih-Hong 한국재료학회 1998 한국재료학회지 Vol.8 No.2

$MgB_4O_7$ 열형광체의 활성체는 란탄계 금속인 Tb, Tm, Dy, La, Ho 및 Nd를 첨가하여 $580^{\circ}C$의 Ar 분위기에서 2시간동안 소결하여 제작하였다. 활성화에너지와 glow 곡선의 주 Peak의 세기는 peak shape법과 초기상승법의 두방법에 의해 결정했으며, 최적활성에너지는 $0.76\pm0.02eV$(Tm 첨가시), $0.94\pm0.03eV$(Tm 첨가시) 및 $0.72\pm0.02eV$(Dy 첨가시)였다. 이들 열형광체들은 저 에너지 X-선에 대해 매우 높은 감도를 나타냈으므로 방사선 센서 소자로 개발하기 위한 기초자료가 될 것으로 생각된다. $MgB_4O_7$: Tb, Tm, Dy, La, Ho and Nd phosphors have been prepared by sintering around $580^{\circ}C$ for 2 hours followed by flowing Ar gas. Activation energy and kinetic order of main peak of glow curve were studied by two methods peak shape method and initial rise method. By these methods, the estimated activation energies were $0.76\pm0.02eV$(Tb doped), $0.94\pm0.03eV$(Tm doped), $0.72\pm0.02eV$(Dy doped), respectively. The TL phosphors prepared in this work may be utilized to radiation sensor elements becaue of their high sensitivity to low energy X-ray.

Detection of Aflatoxins in Soybean Food by HPLC

김영국,노정구,Kim, Young-Kook,Roh, Jung-Koo Korean Society of Food Science and Technology 1985 한국식품과학회지 Vol.17 No.4

고속액체 크로마토 그라피에 CN컬럼과 분리용매로 핵산-테트라 하이드로퓨란-아이소프로필알콜-물을 사용하고 형광 검출기의 검출관에 리클로솔브로 채워 아플라톡신 $B_1$, $B_2$, $G_1$, $G_2$를 분리 정량하었다. 이 조건에서 아플라톡신 $B_1$의 최저 검출한계는 0.2ng이었다. 대량생산 대두발효 식품과 메주에서 아플라톡신함량을 조시하였고, 대두 발효식품에서 사용되는 균주의 아폴라톡신 생성능을 알아보았다. TLC에서는 아플라톡신 유사물질이 검출되었지만 HPLC에서 아플라톡신이 아닌 것으로 나타났다. 시험한 균주의 아폴라톡신의 생성능은 없었다. Aflatoxin $B_1$, $B_2$, $G_1$, and $G_2$were quantitatively detected by the high pressure liquid chromatography on a Micropak-CN column, with Hexane-THF-IPA-water, using a Lichrosorbpacked flowceil in the fluorometric detector. Under those conditions, the minimum detectable amount of aflatoxin $B_1$ was 0.2 ng. HPLC was used in determining amount of aflatoxins in the commercially manufactured soybean food and home-made Meju. Aflatoxin producing abilities of strains used in the industrially fermented soybean food were also studied with the HPLC technique. Although aflatoxin-like substances were detected in a few samples on TLC, they were not identified with the HPLC retention times of standard aflatoxins. The commercial fungal strains used in Korea had no aflatoxin producing abilities.

4성분계 복합 산화물 촉매 이용 메탄의 부분산화에 의한 메탄올 직접 합성

김영국,이광혁,함현식,Kim, Young-Kook,Lee, Kwang-Hyeok,Hahm, Hyun-Sik 한국응용과학기술학회 2014 한국응용과학기술학회지 Vol.31 No.3

Methanol was directly produced by the partial oxidation of methane with four-component mixed oxide catalysts. Four-component(Mo-Bi-Cr-Si) mixed oxide catalysts were prepared by the co-precipitation and sol-gel methods. The catalyst prepared by the sol-gel method showed about eleven times higher surface area than that prepared by the co-precipitation method. From the $O_2$-TPD experiment of the prepared catalysts, it was proven that there exists two types of oxygen species, and the oxygen species that participates in the partial oxidation reaction is the lattice oxygen desorbing around $750^{\circ}C$. The optimum reaction condition for methanol production was $420^{\circ}C$, 50 bar, flow rate of 115 mL/min, and $CH_4/O_2$ ratio of 10/1.5, providing methane conversion and methanol selectivity of 3.2 and 26.7%, respectively.

백광훈 시 ‘석양’ 이미지의 시어 구성 양상

김영국 ( Kim Young-kook ) 한국시가문화학회(구 한국고시가문화학회) 2018 한국시가문화연구 Vol.0 No.42

백광훈(1537-1582) 시의 우점은 평범한 시어의 압운에 따른 미적 포치를 통해 짧은 절구에 자신의 청신한 정서를 고담하게 담아낸 데 있다. 이는 정과 경이 하나로 융합된 이미지를 찾아 짧은 절구에 함축시킴으로써 가능하였다. 이 연구에서는 기존 연구에서 시도된 적이 없는 수사 형식의 분석을 시도하였다. 백광훈은 같은 시료일지라도 분위기나 상황에 따라 적의하게 조사함으로써 절구를 보다 아름답고 자연스럽게 표현하였다. 아울러 함축을 통한 유원함을 추구하여 이미지가 상징적으로 해석되어지고 깊은 여운을 남기게 하였다. 백광훈은 풍부한 당시 표현 역량으로 ‘낙일’, ‘모’, ‘만’, ‘석양’ 등을 시구 속에 적절하게 조사하여 무상, 산수전원의 閑情, 無奈의 서글픔, 한없는 그리움의 ‘석양’ 이미지를 함축시키고, 칠언절구의 기본 구형인 4자/3자 구성에서 ‘석양’, ‘낙일’이 쪼개지지 않게 조사하면서 앞 2자와 뒤 3자를 연결하는 ‘석양’ 이미지를 써 뛰어난 시적 미감을 완성시켰다. Paek Gwang-hun(1537-1582) calmly expressed his original emotion in short wordings of poetry through an aesthetic porch according to rhymes. He converged images of feeling with scenery to achieve his poetic intention. This study intended to analyse rhetorical types he used in his poetry that have never been examined in existing studies. Paek Gwang-hun used materials for poetry properly according to situations and conditions to express quatrain more beautifully and naturally. In addition, as he pursued for eternal images through implication, he made the images interpreted symbolically and have deep aftereffects. He used words of setting sun, an angle, a bay and sunset in his poetry to imply “setting sun” image of transiency, calmness of hills, rivers, fields, sorrow and endless missing. He arranged words of ‘setting sun’ and ‘sunset’ without spill in the structure of four words and three words, a fundamental wording type of a quatrain with seven words to a line and used the ‘setting sun’ image that connected two letters as the head with three letters as the tail to accomplish poetic aesthetics.

주제(Topic)와 주어(Subject): 영어와 한국어의 비교 연구

김영국 ( Young Kook Kim ) 경희대학교 언어연구소 2009 언어연구 Vol.26 No.2

The Korean language uses a strategy of topicalization. The topic in Korean appears in the topic position with a particle `-un/nun.` It always appears clause-initially, or before the subject position. Then what happens to English? Does it have a topic? In this paper, I argue that English also has topicalization. The difference between Korean and English is that in Korean the topic occurs in overt syntactic movement using the particle `-un/nun` while in English it occurs in covert syntactic movement. In English, a topic does not move to the topic position, or before the subject position, syntactically. If an element in a sentence is a topic, it moves to the left of the subject, or the topic position covertly, not overtly. It means that the Korean topic is realized in overt movement while the English topic in covert movement.

CaSO4 열형광체의 제작과 TL 특성

김영국(Young Kook Kim),손인호(In Ho Sohn),채건식(Kun Sik Chae),노경석(Kyung Suk Nho) 경남대학교 기초과학연구소 1994 慶南大學校 基礎科學硏究所 硏究報告 Vol.6 No.-