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미세 전기기계 시스템용 알루미늄 박막의 탄성계수 및 항복강도 평가
주영창,손동일,관동일 대한금속재료학회(대한금속학회) 2001 대한금속·재료학회지 Vol.39 No.3
Nowadays, the aluminum films have wide application in micromechanical devices such as micro sensors and actuators, so that their mechanical properties come to be very important for reliability evaluation. However, there is no standardized method to evaluate the mechanical properties of material used in MEMS (micraelectromechanical system) device since the measured mechanical properties are influenced by many factors such as surface condition, friction force, etc. Hence, we intended to evaluate the mechanical properties of thin film in our study, which is important in mechanical operation. Because MEMS devices are usually operating in elastic range, the Young's modules and yield strength were evaluated by using microcantilever beam technique. First, Al cantilever beams were fabricated using the silicon bulk micromachining technology to have various film thickness. And then, the load-displacement curve was obtained by nanoindentation method. The linear relation in elastic range was utilized in deriving the Young's modulus of Al film, which gives us reproducible result regardless of film thickness. In high load range, the deviation from the linear relation was detected, so that the yield strength of Al film could be evaluated. It is found that the yield strength increases with decreasing film thickness. By applying the misfit dislocation theory and the Hall-Petch relation, the theoretical estimation could predict well the trend of yield strength.
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Dong‑Jun Lee,Taesoo Kwon,Chang‑Kug Kim,Young‑Joo Seol,Dong‑Suk Park,Tae‑Ho Lee,Byung‑Ohg Ahn 한국유전학회 2020 Genes & Genomics Vol.42 No.11
Background Sequence variations such as single nucleotide polymorphisms are markers for genetic diseases and breeding. Therefore, identifying sequence variations is one of the main objectives of several genome projects. Although most genomeproject consortiums provide standard operation procedures for sequence variation detection methods, there may be differencesin the results because of human selection or error. Objective To standardize the procedure for sequence variation detection and help researchers who are not formally trainedin bioinformatics, we developed the NGS_SNPAnalyzer, a desktop software and fully automated graphical pipeline. Methods The NGS_SNPAnalyzer is implemented using JavaFX (version 1.8); therefore, it is not limited to any operatingsystem (OS). The tools employed in the NGS_SNPAnalyzer were compiled on Microsoft Windows (version 7, 10) andUbuntu Linux (version 16.04, 17.0.4). Results The NGS_SNPAnalyzer not only includes the functionalities for variant calling and annotation but also providesquality control, mapping, and filtering details to support all procedures from next-generation sequencing (NGS) data to variantvisualization. It can be executed using pre-set pipelines and options and customized via user-specified options. Additionally,the NGS_SNPAnalyzer provides a user-friendly graphical interface and can be installed on any OS that supports JAVA. Conclusions Although there are several pipelines and visualization tools available for NGS data analysis, we developedthe NGS_SNPAnalyzer to provide the user with an easy-to-use interface. The benchmark test results indicate that theNGS_SNPAnayzer achieves better performance than other open source tools.
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주유철,이동민,양종태,신병철,임태영,서정균,정기영,최동헌,김원,조영신,고희관 조선대학교 2001 The Medical Journal of Chosun University Vol.26 No.2
Background and Objectives : Palindromic rheumatism (PR) is known to be triggered without any obviously inciting events in most patients, although, in a few cases, attacks have been noted to relate to another events such as weather change, childbirth, ingestion of certain foods, or over-exercise. The aim of this study was to characterize the triggering factors on palindromic attacks. Materials and Methods : We evaluated sixty-four patients with PR for the presence of triggering factors and the relationship between attacks and triggering factors by interview of patients. We considered that there was an probable association between episodes and PR, if episodes within 24 hours prior to PR had triggered at least 50% of all attacks and a definite association between episodes and PR, if episodes within 24 hours prior to PR had triggered 100% of all attacks. Results : In 15 patients (35.9%), there was a possible association between episodes of PR and initiating events. In 8 patients (12.5%), there was a definite association between episodes of PR and initiating events. The triggering factors were physical over-activity including exercise (19/64: 29.7%), foods, such as rawfish, crab, and chicken, including alcohol (19/96: 19.8%). However, there were no difference between the groups with and without the triggering factor in sex ratio, duration and onset of PR, the positive rate of rheumatoid factor and involved sites. Conclusion : Our observations showed that PR was triggered by physical over-activity more than in previous reports and hypersensitivity to foods was a causative factor in some patients with PR. However, patients with triggering factors had a similiar clinical profile to patients without triggering factors.
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김주환,김동갑,도재화,전영호 대전대학교 기초과학연구소 2001 自然科學 Vol.12 No.1
대전대학교 일대 용운동지역은 해발 130m-317m로서 지리적으로는 북위 36° 19′ 30″-36° 21′ 30″, 동경 127° 27′ 30″-127° 28′ 30″에 위치하며, 남쪽으로는 식장산, 북쪽으로는 계족산이 위치한다. 1998년 4월부터 2001년 5월까지 본 지역의 관속식물을 채집 ? 조사한 결과 조사지역내에 분포하는 관속식물은 1문, 2아문, 4강, 35목, 94과, 291속, 431종, 1아종, 73변종, 10품종, 2잡종 등 총 517분류군으로 나타났다. 조사지역내 우리나라 특산식물은 4과, 6속 등 총 6분류군으로 조사지역내 분포하는 517분류군중 약 1.16%에 이르며, Polygonatum lasianthum var, coreanum Nakai, Forsythia koeana Nakai, Syringa dilatata Nakai, Paulownia coreana Uyeki, Sambucus latipinna Nakai, Weigela subsessilis L.H Bailey이다 . 또한 귀화식물은 17과, 38속, 44종, 2변종 등 총 46분류군으로 조사지역내 전체 출현종 517분류군의 8.9%에 달하며, 우리나라 전체 귀화식물종 177분류군의 26%이다. The investigated area including Daejeon Universi쇼 is 130 - 317 meter above the sea level and located at 3” 19’ 30” - 36“21‘ 30” N in latitude, at 127‘ 27’ 30” - 127' 28' 30" E in longitude, and on the northern border of Mt. Shikjangsan and on the southbound of Mt. Gyejoksan, Daejeon. The results of vascular plant collection and their investigation from April in 1998 to May in 2001 are as follows: The vascular plants collected and investigated consist of total 517 taxa; 2 hybrids, 10 forms, 73 varieties, 1 subspecies. 431 species, 291 genera, 94 families, 35 orders, 4 classes, 2 subphyla. In this area the Korean endemic plants are 6 taxa (1.16% among total 517 taxa): Polygonaturn Iasianthum var. coreanum Nakai, Forsythia koreana Nakai, Syringa dilatata Nakai, Paulownia coreana Uyeki, Sambucus latipinna Nakai and Weigela subsessilis L.H. Bailey. Also. the naturalized plants are 46 taxa (8.9% among total 521 taxa and 26% among the total naturalized plants in Korea).
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김재홍,윤기범,박평원,김영진,전경민,김영태,김중환,곽호,구상완,송민석,유옥,지혜구,김동원,문상은,박영립,정승호,성범진,성순제,엄주용,황정열,이기홍,이주협,전태진 대한화학요법학회 1994 대한화학요법학회지 Vol.12 No.1
The prevalence of PPNG among pretreated gonorrhea cases isolated at the STD clinic of Choong-Ku Public Health Center in Seoul has been studied and reported annually since 1981. In 1991, 123 strains of N.gonorrhoeae were isolated, among which 58(47.1%) were PPNG. In 1992, 98 starains of N.gonorrhoeae were isolated, among which 51(52.0%) were PPNG. In all, 109(49.3%) strains were found to be PPNG among 221 strains isolated between 1991-1992. The prevalence of PPNG in Seoul showed increased tendency till 1989, thereafter, it has been stationary or slightly decreasing.
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고진공내의 데칸용매하에서의 브롬화메틸이 니트로벤젠 및 톨루엔과의 착물형성에 관한 연구
주충열,임종완,박동진,김영철 漢陽大學校 基礎科學硏究所 1995 基礎科學論文集 Vol.14 No.-
고진공내의 데칸용매하에서 브롬화메틸의 용해도를 8, 15, 25℃에서 니트로벤젠과 톨루엔이 존재할 때와 존재하지 않을 때의 두 경우에 대하여 각각 측정하여 보았다. 데칸용매에 니트로벤젠과 톨루엔이 존재할 때 브롬화메틸의 용해도가 존재하지 않을 때 보다 더 크고, 톨루엔과 브롬화메틸의 상호작용이 니트로벤젠과의 상호작용보다 더 강하게 작용한다는 것을 알 수 있었다. 그리고 니트로벤젠과 톨루엔이 데칸용매내에서 존재할 때 브롬화메틸과 니트로벤젠 및 톨루엔이 각각 불안정한 complex를 형성한다고 생각되어 이 complex를 여러 경우의 비율로 가정하여 계산해 본 결과 1 : 1 complex를 형성한다고 생각되어 이 complex를 여러 경우의 비율로 가정하여 계산해 본 결과 1 : 1 complex를 형성한다고 보는 경우의 평형상수 K값이 비교적 일정한 값을 나타내었다. 그러므로 1 : 1 complex 즉 ??과 ??이 형성됨을 알았다. 또한 이 complex에 대한 표준엔탈피, 자유에너지 및 엔트로피 변화도 산출하였다. The solubilities of methyl bromide in decane on high vacuum were measured at 8℃, 15℃ and 25℃ in the presence and absence of nitrobenzene and toluene. When nitrobenzene and toluene exist in system individually, the solubilities of methyl bromide in the presence of nitrobenzene and toluene are greater than in the absence, and the interaction of methyl bromide with toluene is stronger than with nitrobenzene. In the presence of nitrobenzene and toluene, it could be thought that methyl bromide forms unstable complex with nitrobenzene and toluene. The complex was assumed in various ways and it was evaluated that the equilibrium constant K value was relatively constant under the assumption of 1 : 1 complex. Thus, 1 : 1 complexes, ?? and ??, are formed in the solution. Also, the change of standard enthalpy, free energy and entropy for the formation of the complex were calculated.
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만성요통환자에 있어서 근에너지기법과 치료마사지의 복합프로그램 적용 효과
주동엽,김영빈,정동혁,이중철 圓光大學校 附設 體力科學硏究所 2007 體力科學硏究 Vol.29 No.-
In order to compare and analyze major techniques employed by the college judo competitors of Korea who participated in the 43rd National Male and Female Judo Championships by Weight Class, the players in the light, middle and heavy weight classes were classified into 3 categories: (1) those who are taller than opponents(by +4 cm or more); (2) as tall as opponents(-3~+3 cm); and (3) smaller than opponents(by -4 cm or less). Scoring points and used techniques were examined from videotapes and matching records, which resulted in the following conclusions: 1. In case of light weight players who are taller than opponents, foot(34.73%) was used most frequently and effectively, followed significantly by hand(28.54%), pressing(15.35%), waist(15.31%) and pull-down(4.25%) sacrifice throw techniques(1.66%) in order(p<0.00l). Those who are as tall as opponents used foot techniques(34.88%) more effectively than hand although hand techniques(38.38%) were employed more frequently. For those who are smaller than opponents, hand techniques(35.03%) were used most frequently and effectively, followed significantly by foot(32.57%), waist(8.39%), pressing(16.12%) and pull-down sacrifice throw techniques(7.8%) sequence(p<.001). 2. In case of middle weight players who are taller than or as tall as opponents, foot(30.72%) was used most frequently and effectively, followed significantly by hand(35.42%), pressing(21.32%), waist(8.15%) pull-down sacrifice throw(0.42%) and cross lock(l.06%) in order(p<0.001). However, for those who are smaller than opponents, hand techniques were used more frequently and effectively than pressing, waist and cross lock
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