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운동에너지 탄에 따른 전투시스템 내의 순간화재발생에 대한 해석적 연구
이승철(Lee Seung-Chul),전우철(Jeon Woo-Chul),이해평(Lee Hae-Pyeong),이헌주(Lee Heon-Joo),이창현(Lee Chang-Hyun) 제어로봇시스템학회 2012 제어로봇시스템학회 합동학술대회 논문집 Vol.2012 No.7
본 연구는 외부 위협탄에 의한 전투시스템의 취약성을 분석하기 위한 선행연구로써, 운동에너지 탄의 종류에 따른 가상의 전투차량 내부에 적재포탄에서 순간화재발생 여부에 대한 전산해석을 수행하였다. 본 해석은 Autodyn 프로그램을 사용하였으며 순간화재발생을 판단하기 위해 Lee-Tarver ignition and growth model을 이용하였다. 본 계산에서 운동에너지 탄은 type A와 type B 두 가지로 설정하였고, 고폭탄은 COMPB, TNT 및 PBX9404를 설정하였다. 전산해석 결과, 고폭탄의 재질이 TNT와 PBX9404가 COMPB 재질보다 순간화재발생 확률이 상당히 높음을 알 수 있고 type B의 운동에너지 탄이 type A 보다 순간화재발생 확률이 다소 높음을 알 수 있었다.
운동에너지 탄과 적재포탄에 따른 전투시스템 내부에서의 순간화재발생에 대한 전산해석
이승철,전우철,이해평,이헌주,Lee, Seung-Chul,Jeon, Woo-Chul,Lee, Hae-Pyeong,Lee, Heon-Joo 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.6
In this paper, numerical analysis was performed about whether the flash fire of loaded shells breaks out in the virtual combat vehicle according to sorts of the kinetic energy ammunition as the preceding research for vulnerability analysis inside the combat system by an external threaty ammunition. In this simulation, Autodyn program was used and the Lee-Tarver ignition and growth model was used to determine the flash fire outbreak. In this study, the kinetic energy ammunition was set of type A and type B in two kinds and the loaded shells was set of COMPB, TNT, PBX9404 and ANB. As a result, TNT and PBX9404 have much higher flash fire probability than COMPB in high explosive, ANB has very low flash fire probability.
서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)
김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1
In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.
분자선 에피탁시로 Si 기판 위에 성장한 GaAs/Ge 에피층의 특성
우용득,이해익 우석대학교 부설 기초과학연구소 1997 기초과학연구소 논문집 Vol.2 No.-
Properties of GaAs/Ge epilayers grown using two step growth method on Si substrates by molecular beam epitaxy(MBE) are investigated using scanning electron microscopy(SEM), transmission electron microscopy(TEM), double crystal X-ray diffraction(DCXD), photolumin escence(PL) spectroscopy and Raman spectroscopy. PL. Raman and DCXD results show that the GaAs epilayer grown by two step growth method has best crystallinites. Because of the high temperature growth in two step growth method has an annealing effect upon the inital prelayer and the Ge buffer layer, resulting in the suppressed dislocatin initation.
근저항 트레이닝이 20대 여성의 신체조성과 체력에 미치는 영향
이상우,김봉환,서해근,강신범,나재철 대한스포츠의학회 1999 대한스포츠의학회지 Vol.17 No.1
The purpose of this study was to investigate the effect of muscular resistance training on the body composition and the physical fitness. The subjects of study were 6 women in their twenties who had not taken will in ordinary days and had not gone through regular training. The above subjects were measured by body composition and physical fitness pre and post 8 weeks training. The frequence training was more than 4 times a week and the duration of training of each session was 70 miniutes. The results are as fallows: 1. In muscular resistance training for 8 weeks, % Fat 1.8%(7.76%), and Fat weigh 3.0kg(23.43%), wee decreased, while LBM 3.0kg(7.10%) was increased, However, there was no differences. 2. In muscular resistance training for 8 weeks, it was exposed to be increased a little in Left arm strength 2.65kg(9.60%), Fight arm strength 2.03kg(7.78%), Left leg extention strength 12.47kg(6.16%), Right leg extention strength 4.50kg(2.35%), Left leg flextion strength 13.67kg(13.01%), Right leg flextion strength 13.25kg(12.70%), Standing trunk flextion 3.25㎝(18.16%), Front split 2.67㎝(1.65%), Side step 3.83friq(11.16%), Vital capacity 5.02cc(0.22%).
[1.1.1.1]Paddlane과 할로겐 화합물과의 반응
李愚鵬,吳東元,黃悳海,權明淑,鄭宰準 慶北大學校 師範大學 科學敎育硏究所 2002 科學敎育硏究誌 Vol.26 No.-
[1.1.1]Paddlane has an inverted structure at two bridge-head carbon atoms. We will describe the reaction of [1.1.1]Paddlane and [1.1.1.1]Paddlane. The reaction of [1.1.1]propellane with singlet methylene affored 1,3-Dimethylene as the major product and [1.1.1.1]paddlane as the minor products were obtained. The reaction of [1.1.1]propellane with triplet methylene was carried out in the similar conditions. The result afforded 1,3-Dimethylenecylopropane as the major product and various side products were also obtained. But no trace of [1.1.1.1]paddlane was detected. After the synthesis of [1.1.1.1]paddlane, continuously [1.1.1.1]paddlane reacts with iodide. The product that I expected for 1,3-diiodo-tricyclo[1.1.1.1]hexane is different. and has unsymmetrical structure.
Prostaglandin이 家兎 腎皮質의 Na-K-ATPase 活性度에 미치는 影響
李星雨,朴海根 충남대학교 의과대학 지역사회의학연구소 1985 충남의대잡지 Vol.12 No.1
Renal prostaglandins(PGs) are synthesized in both the cortex and the medulla. PGs modify the renal excretion of salts and water. This effects of PGs are related to several different sites of action in the kidney that include : 1) direct inhibitory effects on ion transport in the distal tubule: 2) enhancement of basal water permeability of the collecting tubule and inhibition of the hydroosmotic effect of vasopressin. On the other hand, Na--K-ATPase act as carrier of active Na^t transport across the cell membrane. This study was attempted to investigate the action of PGs on the Na-K-ATPase activity in the renal cortical homogenate. PG E_2 and F_2αconcentration in the incubation medium were 100, 10, 1.0 mg/ml, respectively. The results obtained are summarized as follows: 1. Total ATPase and Na-K-ATPase activity of the renal cortical homogenate were 15.11±0.64 and 1.65±0.18 μM/10min/mg protein. 2. Total ATPase activity in PG E_2 concentration of 100㎍/ml was significantly inhibited as 80.4±5.6% to the control value. 3. PG E_2 inhibited the Na-K-ATPase activity. Especially, 1.0㎍/ml in concentration significantly inhibited the Na-K-ATPase activity as 75.4±19.8 % to the control value. 4. PG F_2α also inhibited the Na-K-ATPase activity. Especially. 1.0 ㎍/ml in concentration significantly different. From the above results, it was suggested the action of PG E_2 and PG F_2α on the kidney was mediated by inhibition of renal cortical Na-K-ATPase activity.
'姐姐'의 기저형 /t??iγ214 t??iγ214/에서 표면형 [t??je21 dzjE4]까지의 유도과정에 대해
李海雨 한국중국문화학회 2002 中國學論叢 Vol.14 No.-
In this paper, I have examined the phonological rules and phonological processes of Mandarin Chinese 'jieˇjie(姐姐)'. The discussion are divided into two parts: the first one dealing with the phonological rules that occur from the underlying representation '姐姐'/teiγ214 teiγ214/ to the phonetic representation 〔teje21 dzjE4〕, and the second one dealing with the phonological processes that derives the phonetic representation 〔teje21 dzjE4〕from the underlying representation /teiγ214 teiγ214/. I propose the following six phonological rules: ① the fronting of the main vowel /γ/, ② the semi-vowelizing of medial /i/, ③ the neutralization of the second tone in reduprecation, ④ the third tone sandhi rule, ⑤ the voicedness of the initials in neutral tone, ⑥ the laxation of the tense sound in neutral tone. These six rules should be well organized to derive the phonetic representation 〔teje21 dzjE4〕from the underlying representation /teiγ214 teiγ214/. If the rule ordering is not pertinently applied, the phonetic representation may not be produced. Especially, the rules ④⑤ and ⑥ should be applied after the rule ③ because they can occur under the condition of the tonal neutralization.
소아에서 발생한 Calcaneal Petechiae (Black Heel) 1예
이호섭,우상혁,유화정,유동수,송해준 대한피부과학회 2004 대한피부과학회지 Vol.42 No.1
Calcaneal petechias (black heel) is a traumatic lesion affecting the back of posterolateral aspect of the heel. An asymptomatic, pigmented, macular lesion is found on one or both heels immediately above the hyperkeratotic border of the foot. It is caused by any sport, such as basketball, tennis, or football, that leads to slamming of the foot against the shoe. Calcaneal petechilae is probably more common than is realized. As it is usually symptomless, it may be disregarded or only observed by chance. The importance of the lesion lies in its clinical resemblance to a malignant melanoma. We report a case of calcaneal petechiae which was confused clinically with a melanoma. (Korean J Dermatol 2004;42(1):84~86)