• Asian-Australasian Journal of Animal Sciences
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• 제17권9호
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• pp.1227-1231
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• 2004

Pig oocytes contain high levels of lipids in the ooplasm, which reduces the visibility of the germinal vesicle (GV) under microscopic examination. Therefore, the purposes of this study were to investigate the effects of relative centrifugation force (RCF) on the visibility and maturation rates of the GV stage oocytes after centrifugation. In Experiment 1, cumulus-oocyte-complexes (COCs) were collected from slaughterhouse ovaries and randomly allocated to different RCFs (3,000 rpm: 970 g; 6,000 rpm: 3,900 g; or 10,000 rpm: 10,840 g) for 10 or 20 min. Percentages of visible GV were 76-79% in the oocytes centrifuged with 10,000 rpm, which were significantly higher (p<0.01) than those with 3,000 and 6,000 rpm. No significant differences in GV visibility were observed among oocytes with different lengths of centrifugation (p<0.05) regardless of the RCFs. In esperiment 2, the maturation rate of the oocyte was found significantly lower in the 20 min than in the 10 min group received 10,840 g of RCF (30 vs. 75%, p<0.05). In conclusion, the GV of porcine oocytes can be clearly visible by centrifugation at 10,840 g for 10 min without compromising their subsequent maturation rates and a longer centrifugation time (20 min) had no beneficial influence on the visibility of GV stage pig oocytes.

• 공연문화연구
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• 제39호
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• pp.31-67
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• 2019

본고는 판소리 <적벽가>를 창극으로 만드는 작업의 어려움을 판소리와 창극의 장르상 차이에 있다고 보고 판소리의 서사와 음악이 창극에 그대로 활용되기 어렵다는 점을 밝혀내었다. 전승 5가를 창극으로 만든 작품들은 대부분 판소리의 서사와 소리를 그대로 공연한다. 그러나 판소리 <적벽가>의 원본 서사는 전반부와 후반부의 생성이 따로 이루어졌기 때문에 눈에 띄게 이원적 구조를 가지고 있다. 판소리와는 달리, 이야기를 무대화하여 시각적으로 보여주는 드라마 장르에서는 행동의 일치가 중요하게 때문에, 원본 서사의 이원성은 행동의 불일치라는 결함으로 드러날 수 있다. 또한 판소리 원작의 소리들은 극적이기보다는 설명적인 대목이 많으며, 극적 클라이맥스인 적벽대전 장면도 설명적이고 해학적인 사설로 되어 있어서 창극에서 극적인 장면으로 연출하기에 어려움이 있다. 다만 소설 원작에는 없는 군사들의 목소리는 창극에서 연출되었을 때, 이면적 주제를 효과적으로 드러내는 역할을 한다. 그러나 군사들의 목소리마저도 서사적인 측면에서는 핍진성을 결여하고 있기에, 판소리 원본 텍스트를 그대로 창극에 이식하기에는 무리가 있다. 창극 <적벽가>는 능동적으로 판소리 <적벽가>를 연구하고 해체해야만, 창극만의 독자적인 새로운 작품으로 거듭날 수 있을 것이다.

• The Korean Journal of Pain
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• 제23권1호
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• pp.28-34
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• 2010

Background: An independent medical examination (IME) is a critical process for awarding reparation for injury. However, conducting an IME in pain medicine is very difficult, not only because pain is a subjective symptom, but also because there are no proper objective methods to demonstrate it. This study was conducted to compare IME reports and the court decisions on the disability status of the patients. Methods: We analyzed 79 IME reports and 25 corresponding court decisions on the disability status of patients. The diagnoses, causal relationships between the patients' status and the trauma, McBride's degree of disability, the American Medical Association's impairment ratings, the estimated annual cost for future treatment, and the necessity of care-giving were compared and analyzed. Results: The diagnoses in the 79 cases were complex regional pain syndrome (CRPS) type I (58 cases), CRPS type II (7 cases), peripheral neuropathy (5 cases), myofascial pain syndrome (4 cases), herniated intervertebral disc (2 cases), and fibromyalgia (1 case). The types of accidents were road traffic accidents (50 cases), military injuries (14 cases), industrial accidents (11 cases), and others (4 cases). The IME reports and the court decisions stated considerably different McBride's degrees of disability (P = 0.014). However, there was no significant difference in the estimated cost for future treatment between the IME reports and the court decisions (P = 0.912). Conclusions: IME reports should be accurate, fair, and based on objective findings. Feedback on IMEs from the court decisions is helpful for reference use.

• 대한족부족관절학회지
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• 제2권2호
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• pp.57-63
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• 1998

Stress or march fractures among military personnel, especially recruits, has been appreciated for many years. According to the classical references, the second metatarsal was one of the first sites identified as a focus for march fractures and radiological evidence of fracture appeared as late as several weeks. The purpose of this study was to document the clinical feature of march fractures in Korean infantry soldiers. From 1997 to 1998, at one infantry medical company of OO infantry corps in Korea, 15 (19cases) patients with march fracture were detected among infantry soldiers. There were some different finding in the fracture site and its clinical features from the previous foreign reports. 1. There were pain and local swelling in all cases as clinical manifestation. By physical examination, direct point tenderness on the location of the fractured metatarsal shaft was characteristic. 2. On roentgenographic examination, cortical fissuring or break was seen one week after onset of symptoms and external callus was seen from two weeks or at the least four weeks. Oblique view was more useful than AP view in the diagnosis of march fractures. 3. The third metatarsal was the most frequently involved site(7 cases, 48%). and the second metatarsal was Jess frequent(3 cases, 20%). This difference of frequent site with previous reports might be attributed to the relatively long shaft of the third metatarsal, but should be analyzed in further study. 4. The incidence of the development of march fracture was 1 per 104 infantry soldiers.

• 한국정보통신학회논문지
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• 제25권9호
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• pp.1206-1213
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• 2021

군사용으로 개발된 드론(drone)은 관련 기술의 발전과 함께 군사용을 벗어나 민간 영역에까지 그 활용 범위를 넓혀가고 있다. 현재 드론은 농업 분야를 비롯하여 무인 택배, 영상콘텐츠 제작, 건축 분야 등에서 드론의 사용이 활발히 증가하고 있다. 우리나라는 2021년부터 드론 비행을 위한 드론 자격증 제도를 도입하여 운영 중이며 최대 이륙중량 2kg 이상의 드론 비행은 비행경력과 실기 시험이 요구된다. 그러나 2kg 미만의 드론은 비행경력이나 실기 시험이 필요 없이 온라인 교육 자격만으로도 운영할 수 있다. 최근 최대 이륙중량 2kg 미만의 촬영용 드론의 보급이 급격히 증가하고 있으며 이와 관련된 사고 또한 증가하고 있다. 본 논문은 급격히 증가하는 촬영용 드론의 특징에 대하여 살펴보고 이와 관련된 촬영용 드론 교육 방안에 대하여 논의한다.

• 한국산학기술학회논문지
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• 제21권4호
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• pp.164-172
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• 2020

군용항공기에 장착되는 연료/오일 열교환기는 연료의 저온을 이용하여 항공기 탑재부품 구동장치나 유압펌프와 같은 다른 장치에 공급되는 윤활유를 냉각시키는 장치로 항공기 탑재부품 구동장치로 연결되는 윤활유 유입포트에 균열이 발생되었다. 만일 열교환기의 균열이 발생될 경우 다른 장치에 공급되는 윤활유 냉각이 이루어지지 않아 더 이상 비행을 할 수 없기 때문에 해당 결함은 항공기 가동률 저하에 큰 원인이 된다. 본 연구에서는 군용항공기 연료/오일 열교환기 항공기 탑재부품 구동장치 오일포트 균열 현상을 개선하기 위해 오일 포트 균열부위 파단면에 대한 비파괴 검사와 현미경 검사를 수행하여 균열에 대한 경향성을 분석하였으며, 열교환기 오일포트에 연결되는 오일 배관은 티타늄 재질의 배관으로 열교환기에 장착 시 과도한 토크로 체결되어 열교환기 균열의 주된 원인으로 확인되어 유한구조해석을 통해 장착 토크 적용 시 열교환기에 과도한 힘이 전달되는 것을 검증하였다. 해당 결함에 대한 개선 방안으로는 항공기 탑재부품 구동장치 오일 포트에 장착되는 배관의 재질과 직경을 변경시켜 적용 토크 값을 열교환기 오일 포트에서 견딜 수 있는 값으로 조정하였으며, 또한 맥동압력으로 인한 피로누적을 최소화시키기 위해 배관의 굽힘값을 조정하였다. 결과적으로, 동일한 조건에서 개선된 배관을 장착하여 지상시험을 통해 열교환기에 균열이 발생되지 않는 것을 확인할 수 있었다.

• 한국치위생학회지
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• 제14권3호
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• pp.327-332
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• 2014

Objectives : The purpose of the study is to investigate the self awareness of oral health, dental calculus and gingivitis according to smoking in soldiers. Methods : A self-reported questionnaire was filled out by 601 soldiers in Jeonnam military unit from April 7 to 23, 2013. The screening for oral examination was performed in the soldiers. The data were analyzed for frequency analysis and chi-square test by using SPSS 21.0 program. Results : The self awareness of smoking on oral health accounted for 27.0% in good status in nonsmokers, 23.5% of the past smokers answered good, and 16.5% of the smokers answered good. Approximately, 68.7% had dental calculus(p<0.05). The smokers tended to have more gingivitis than the nonsmokers and the past smokers(p<0.05). Conclusions : Smokers had low level of self awareness of oral health than the nonsmokers and the past smokers.

• Journal of the Korean Wood Science and Technology
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• 제10권3호
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• pp.190-193
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• 1982

Conclusion: The results of this study are encouraging for the development of a set of interpretable diagnostic criteria for a reasonably reliable identification of some species. The present study has been limited in the characteristics studied and was made on relatively poor photography. Further study on high quality photography, over wider areas and including such additional characteristics as crown texture and shadow intensity should prove useful. A preliminary examination has been made of some photo-image characteristics of a number of important tree species on large scale (1:9,000) contact prints of panchromatic mm. The characteristics studied were crown image tone, and shape. Image tone was estimated against a standard grey-scale and shows within-species consistency and a range between species. Crown shapes were subjectively assessed but there appears to be a within-species consistency and interpretable between-species differences. The results of this trial suggest that it should be practicable to make a number of important species distinctions by photo-interpretation with a useful degree of reliability. Other characteristics beside those studied might be usefully examined. Photography: Hand-printed glossy contact prints of vertical 1:9,000 scale panchromatic photography of Kwangnung Experimental Forest flown May 1964. The filter used is unknown (probably minus-blue). The camera is unknown but was probably a military type K-17 or K-22 with 6"(apostfophy) lens. The photography shows notably poor resolution. Species: 143 individual trees ranging through 11 species (7 softwood, 4 hardwood) were included in the study. A range of size classes were included for each species.

• International Journal of Naval Architecture and Ocean Engineering
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• 제10권6호
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• pp.762-781
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• 2018

This paper presents the ballistic armor performance examination and thickness estimation for the latest naval ship structure materials in the Republic of Korea. Up to date, research regarding methods of ballistic experiments establishing database on the latest hull structure materials as well as a precise method of estimating required thickness of armor against specific projectiles have been rarely researched. In order to build a database and estimate proper thicknesses of structure materials, this study used four structure materials that have been widely applied in naval ships such as AH36 steel, AL5083, AL5086, and Fiber Reinforced Plastics (FRP). A $7.62{\times}39mm$ mild steel core bullet normally fired by AK-47 gun was considered as a threat due to its representativeness. Tate and Alekseevskii's penetration algorithm was also used to calculate a correction factor (${\alpha}$) and then estimate the armor thickness of naval ship hull structure materials with a given impact velocity. Through live fire experiments, the proposed method performance difference was measured to be 0.6% in AH36, 0.4% in AL5083, 0.0% in AL5086, and 8.0% in FRP compared with the experiment results.

• 한국실내디자인학회논문집
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• 제15권3호
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• pp.3-13
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• 2006

It is obviously true that the aspects of interior designs in current use have been combined with changing trends and developed and handed down throughout centuries. An examination of respective characteristics of spaces where Korean presidents have lived during their terms of office could get a useful clue by which both traces of Korean modernism and senses of modeling can be perceived. However, there are not enough literatures that can be verified. Therefore, it would be especially meaningful to find out and analyze documents unearthed. The purpose of this study is to consider the expressiveness of interior designs of presidential residence and office which have been combined with changing trends and developed, while classifying respective cases during presidential tenure by periods of Joseon Government general, U. S military administration, the first Republic, the second Republic, the third and the fourth Republic, the fifth Republic, and the sixth Republic, examining relevant literatures, photos, drawings and making on-the-spot survey. The study is also intended to get a better understanding of the aspects and the features of interior designs shown in presidential residences and offices that are not so much made known due to uneasy access to archives and to document the resources buried in oblivion and to consider the historical meanings.