THERRESTRIAL IMPACT CRATERING CHRONOLOGY: A PRELIMINARY ANALYSIS

Moon, Hong-Kyu,Mi, Byung-Hee,Fletcher, Andre-B.,Kim, Bong-Gyu The Korean Space Science Society 2001 Journal of Astronomy and Space Sciences Vol.18 No.3

We have recently compiled a database of the properties of 192 impact craters, which supercedes previous compilations. Using our database, the impact structures found in North America, Europe and Australia have been examined; these cratonic areas have been relatively stable for considerably long geological periods, and thus have been best preserved. It is confirmed that there is a close correlation between the geological epoch boundaries, the epochs of mass extinctions, antral the "timing" of impacts. In addition, the terrestrial cumulative flux of objects >20km is found to be $1.77{\times}10^{-15}km^{-2}yr^{-1}$, over the last 120 Myr, which is much smaller than the published values in McEwen et al. (1997) and Shoemaker (1998) ($5.6{\pm}2.8{\times}10^{-15}km^{-2}yr^{-1}$. For terrestrial impact structures with D> 50 km, the apparent cumulative flux over the last 2450 Myr is ~50 times smaller than the corresponding value for the Moon. If we assume that the Earth and the Moon suffered the same level of bombardment over this time, this would mean that the actual flux of impacting bodies, capable of making craters with D)50 km, was ~ 50 times larger than the apparent flux estimated from the currently known terrestrial records.

플라비아닌산을 이용한 클로르프마진의 용매추출 분광광도법

정문모,남수자,이미나,이지연,허문회,안문규 慶星大學校 1998 論文集 Vol.19 No.2

성조형 실현 규칙의 임의화와 16세기 말엽의 성조 체계

이문규(Lee, Moon-Kyu) 한국어문학회 2017 語文學 Vol.0 No.137

The Incapacitation of the actualization rules of the tonal pattern (TP) reveals the remarkable changes since the “side-dot” began to be used in the documents in the history of Korean tonal system. It is noted that no other significant changes occurred in the level of morphemic TP or combination of TP in the same period. The actualization rules of TP consists of the “pitch-assignment rules” and the “pitch-adjustment rules.” These actualization rules in Korean were gradually incapacitated toward the end of the sixteenth century. During the mid-fifteenth century, the surface TP of a phonological word was aligned with the actualization rules of TP. However, it brought the changes at the end of sixteenth century, affected by the incapacitation of the pitch-assignment rules and the pitch-adjustment rules. The incapacitation of the actualization rules of TP has blurred the distinction between tonal patterns and pitches. Additionally, this phenomenon is interpreted to cause the dephonologizing of Korean tones. In conclusion, the incapacitation of the actualization rules of TP shows that the second stage of tonological changes of Korean language had already appeared in the end of the sixteenth century. It seems reasonable to argue that the tonal system in the sixteenth century should be distinct from that of the mid-fifteenth century. Until the sixteenth century the incapacitation of the actualization has been complete, as the source materials maintain the morphemic TP system and the first stage of tonological pattern in the fifteenth century.

‘말(語)-류’ 성조형의 방언 간 대응 양상과 의의

이문규(Lee, Moon-kyu) 한국어문학회 2015 語文學 Vol.0 No.128

This study examines the correspondence aspects of ‘mal(語)-pattern’ and direction of change of tonal system in the Korean tone dialects. The correspondence aspects of the surface tonal patterns of ‘mal(語)-class’ in middle Korean and several modern tone dialects are may be summarized as follows. [표참조] After considering the aspects, we can realize the fact that there is a tendency for ‘mal(語)-pattern’ to be integrated into ‘mal(斗)-pattern’ or ‘mal(馬)-pattern’ in Korean tonology. The ‘mal(語)-pattern’ [HLLL] of Yukjin dialects is the result of the change ‘[RLLL] >[HLLL]’. And ‘mal(語)- pattern’ [HHLL] of the young generation of Daegu dialect is the the result of the change ‘[RHLL] > [HHLL]’. Both [HLLL] and [HHLL] are ‘mal(斗)- pattern’ in those dialects. On the other hand, [LHLL] of Jinju dialect is ‘mal (馬)-pattern’. At the pitch system level, this integrating phenomenon of ‘mal(語)-class’ is the process in which ‘rising’ or ‘lowest’ pitch extinct because of their articulatory difficulties. And at complexity class of tonal system, this phenomenon implicate that three-tonal patterns system of Korean tonal dialects changes to two-tonal patterns systems, and ultimately these dialects are changing to non-tone language.

국어 성조 체계의 ‘말(馬)’-형 선호 경향과 그 의의

이문규(Lee, Moon-Kyu) 한국어문학회 2018 語文學 Vol.0 No.141

Among several tone patterns in the Korean tone system, there is a tendency for the ‘mal(馬)’-pattern to have the strongest preference. This is based on the following several tonal phenomena: 1) All three replacements of tonal patterns that are common in the middle Korean and the modern Korean tone dialects aim the ‘mal(馬)’-pattern. And these replacements have been expanded with time. 2) The ‘mal(馬)’-pattern is the common tonal pattern of all the symbolic words in both the middle Korean and the modern Korean tone dialects. 3) The ‘mal(馬)’-pattern shows a significantly higher share in the tonal patterns of Sino-Korean family names than in the sound of Chinese characters used for other words. 4) The ratio of the ‘mal(馬)’-pattern has diachronically increased in the tonal patterns of Sino-Korean words. It is reasonable to assume that the preference for the ‘mal(馬)’-pattern should go back to the period when the pattern was with the initial-low-tone since it is phonetically the most unmarked tonal pattern. Furthermore, it can also be assumed that the tone systems of the middle Korean and the Hamgyeong-dialect group with the ‘mal(馬)’-pattern in the initial-low-tone, are the closest to the proto-Korean tone system.

달 탐사선의 발사 요구조건 및 임무궤도 사례연구

석병석(Suk, Byong-suk),민승용(Min, Seung-yong),권재욱(Kwon, Jae-wook),김창균(Kim, Chang-kyoon),문상만(Moon, Sang-man),최수진(Choi, Su-jin),구철회(Koo, Cheol-hea),김인규(Kim, In-kyu),류동영(Ryu, Dong-young) 한국항공우주연구원 2015 항공우주산업기술동향 Vol.13 No.2

시험용 달 궤도선의 발사 요구조건 사전 분석 단계로 최근 외국에서 발사한 달 탐사선의 발사 요구조건을 분석하였다. 일반적으로 달 탐사선의 발사 요구조건은 달 임무 궤도를 결정하는 중요한 요소이며, 또한 지구, 달, 태양의 상대적인 운동으로 인해 임무궤도 요구조건을 만족하는 발사 가능 시간이 주기적으로 반복되는 경향이 있다. 분석 결과 설정된 발사 요구조건들로부터 달 궤도선의 주 임무가 달의 남/북극 지역의 광학 관측 임을 간접적으로 알 수 있었다. 향후 우리나라 달 궤도선 발사 요구 조건 설정에 본 논문이 도움이 되길 기대한다. In the preliminary study on launch window requirement for Korea Path-finder Lunar Orbiter(KPLO), the recent foreign lunar orbiter’s lauch window requirement was analyzed. Normally, the launch requirements depends on the mission orbit. Based on the relationship between Moon, Earth, and Sun, the launch time will be available periodically to meet requirements. In this paper, it is understood that the launch window requirements come from payload mission requirements to take picture each poles of Moon. This paper might be a practical example to derive KPLO launch requirements in the future.

TMCP 강재를 사용한 용접 H형강 보-기둥의 특성에 관한 연구

문태섭,김규석,김동규,김덕재 서울市立大學校 1993 論文集 Vol.27 No.-

This paper is the experimental study on the behavior of welded H-shape beam-column using TMCP steel. The purpose of this paper is to evaluate the elasto-plastic behavior of TMCP steel as it applies beam-column members. In the test, H-188 ×188 ×30 ×30 shape beam-column was loaded monotonic and cyclic by parameter "e"(eccentricity). The structural behavior of specimen under the eccentric loading have been evaluated by moment-curvature relationship and load-deflection relationship. Their load carrying capacities from the result of the test are compared with the theoretical load capacities based on P-M interaction curve.

雜種强勢 發現家蠶의 計量形質에 관한 硏究

文炳圓,金圭範,崔周鎬 진주산업대학교 1999 산업과학기술연구소보 Vol.- No.6

본 試驗은 누에 一代雜種育種에 있어 良質多絲量 優量品種을 育成하기 위한 遺傳的 情報를 얻고자 遂行되었다. 供試材料는 特性이 각각 다른 日, 中,歐 3個地域 6개 品種을 正逆으로 一.面交雜시켜 F_1, F_2 각각 30組合으로서 實用形質에 대한 育種價를 얻기 위해 交配組合別 雜種强勢 및 組合能力의 檢定한 結果는 다음과 같다. 1.形質들의 雜種强勢은 絲質形質인 繭絲量, 繭絲長에서 각각 24.51% 및 23.43%로 높았고 繭質形質인 全繭重 및 繭層重은 15.56%∼15.71%, 17.14%∼19.01%로서 有意한 强勢로 보였으나 幼蟲經過日數등 (5齡 및 全齡)에서는 負의 雜種强勢를 나타낸다. 2.交配組合間의 雜種强勢는 5齡經過日數의 경우 C70×Romogua, N9×Romogua조합이 높은 負의 强勢現象을 보여 飼育日數가 短縮되는 方向으로, 全繭重은 N9×Sansurian의 암, Romogua×Sansurian의수, 繭層重은 암수에 關係없이, N9×San-surian의 繭絲長과 繭絲量에서는 Sansu-rianxRomogua의 正逆間 交雜에서 높다. 3.雜種强勢의 母本效果는 N9×C5, N63×C70 이 全繭重과 繭層重에서 繭絲長에서는 Sansurian이 N63, C5 및 C70과 交雜될 때, 또한 繭絲量에서는 N9×C70, N63×N70이 큰 傾向이다. 4.F_1의 組合能力에서 分散量은 GCA, SCA 및 RCA의 全形質에서 有意하여 F_1의 組合能力은 相加的 效果와 非相加的 效果가 함께 作用하고 形質에 따른 正逆間 差異가 크다. 5.GCA의 效果는 經過日數에서는 Sansurian이 負로, N9, C5가 繭質形質(繭長, 繭幅, 全繭重, 繭層重 및 繭層比率)과 絲質形質(繭絲長, 繭絲量 및 生絲量比率)에서 世代에 關係없이 높은 正의 效果를 나타낸다. 6.F_1의 SCA效果에서 5齡經過日數는 Sansurian×C70, Romogua×C70, Sansurian×C5, Romogua×C5등 歐州種系와 中國種系간의 交雜에서, 全繭重과 繭層重은 N9×C5, C70×Sansurian이 암수에 關係없이 Romogua×Sansurian, N9×C5가 F_1, F_2間에 繭絲量은 Ronogua×N63 組合에서, 生絲量比率은 Sansurian×Romogua 組合에서 높게 評價되다. Six parental varieties and each set of 30 diallel crosses in F_1`s and F_2`s were used as test materials. These were bred on the randomized complete block design with three replications. Fourteen Charateristics were studied with the twenty samples in each tray and analyzed for the heterosis and the combining ability in F_1 hybrids. The results obtained as follows ; The heterosis were showed positively high at 24.51% in cocoon weight and 23.43% in cocoon length respectively. The whole cocoon weight showed a sighificant heterosis ranging form 15.56% to 15.71% and also the weight of whole cocoon layer from 17.14% to 19.01%, but the 5th instar and the total instar period showed negative heterosis. It was found that the combination between C70×Romogua and N9×Romogua showed highly a negative heterosis on the 5th instar period and for the cocoon weght. The female of N9+Sansurian and the male of Romogua×Sansurian have highly effected of heterosis on the cocoon shell weight, and Sansurian×Ronogua(reciprocal) on the weight and the length of cocoon filament with no regard to sexuality. The combinations among N9×C5 and N63×C70 were observed with a significant maternal and cytoplasmic effet on the heterosis of cocoon weignt and cocoon shell weight and also those had on the length of cocoon filament with combiantions amongst Sansurian×N63, Sansurian×C5, Sansurian×C70 and N9×C70, and N63×C70 also such on the weight of cocoon filament. As a mean squares of GCA, SCA and RCA it were significant with these combining ability for all characteristics resulted from additive and non-additive together and there is a significant among reciprocals. Sansurian showed a negative GCA effect on the 5th and total larval duration, but a higher positive GCA effects tok place with varieties of N9 and C5 on the length, the weight, the length and weight of cocoon filament , the percentage of raw silk with no regard to both generations and silkworm sexuality. The values by cross combinations were varied in generation-wise and sex-wise. It was shot it was positive effect on the cocoon weight, cocoon shell weight with N9×C5 and C70×Sansurian, and on the length of cocoon filament with N9×C5 and Romogua×Sansurian on the weight of cocoon filament between Romogua and N63 and on the percentage of raw silk for the combination of Sansurian×Romogua.

전경대원에서 발생한 결핵의 임상 양상

문창기,박상준,조민구,김영중,김소연,김윤권,정준오,안석진,김은실,서승오,김지훈,최원제,이윤영,박형기,최규영,김현근 대한감염학회 2006 감염과 화학요법 Vol.38 No.6

Background: The purpose of this study was to document the incidence and clinical characteristics of patients with tuberculosis (TB) in combat and auxiliary police, living in a group, in Korea where the incidence rate of active TB in a general population is higher than in Western countries. Materials and Methods:We retrospectively reviewed the medical records of all tuberculosis patients diagnosed at National Police Hospital from January 2002 through December 2004. Results:In 2002-2004, a total of 156 cases of tuberculosis were identified with the mean (Standard deviation) age of 20.6 (±1.0) years. Of these, 134 (85.9%) patients were registered as new cases, 11 (7.1%) as relapse, 2 (1.3%) as failure, 5 (3.1%) as treatment-after-default cases whereas 4 (2.6 %) patients were not included in any categories. Average annual new TB rate and smear-positive TB rate were 86.5/10^(5) and 17.4/10^(5) person-years, respectively. In 12 of 31 smear-positive cases, time from onset of symptoms to diagnosis was more than 30 days. Two multidrug-resistance TB cases were identified and two suspected outbreak episodes of TB had occurred during 3 years. Conclusion:There was no statistically significant difference in the incidence rate of new cases of TB between the general population aged 20 to 29 years and combat and auxiliary police in Korea. 배경 : 국내 결핵의 발생은 감소 추세에 있으나 여전히 후진국형 발생양상을 보이고 있다. 특히 집단생활을 하는 젊은이들에서 발생하는 결핵의 유행이 간헐적으로 알려지고 있어 우려를 낳고 있다. 이에 저자들은 최근 전경대원의 결핵 발병 양상에 대해 알아보고자 본 연구를 시행하였다. 재료 및 방법 : 2002년 1월부터 2004년 12월까지 3년간 경찰병원에서 결핵 진료를 받은 전경대원의 의무기록을 후향적으로 분석하여 연도별 결핵 신환발생률, 도말양성결핵 신환율, 진단 지연, 집단발병, 다제내성결핵을 조사하였다. 결과 : 연도별 결핵 신환자 수(10만명당 발생추정치)는 2002년 50명(83.6명), 2003년 42명(83.7명), 2004년 42명(93.5명)이었고 도말양성 폐결핵 신환자 수는 2002년 10명(16.7명), 2003년 11명(21.9명), 2004년 6명(13.4명)이었다. 3년간 도말양성 폐결핵 환자는 31명이 있었고 그 중 12명은 호흡기 증상 발생 30일이 지나서 진단을 받았다. 다제내성 결핵은 2명이 있었으며 결핵의 집단발병이 의심되는 사례는 2차례 있었다. 결론 : 전경대원과 20-29세 연령군 일반인의 결핵 신환발생률, 도말양성 폐결핵 발생률의 통계적으로 유의한 차이는 없었다.

國民學生의 身體的 發育發達의 差에 대한 遺傳과 環境의 要因別 比較分析

文圭鎭 釜山敎育大學 1989 부산교육대학 논문집 Vol.25 No.1

1. The purpose of the study. This study purpose to analyze following three items and to find their correlation for 1360 girl and boy students in elementary school. 1. The effects of heredity and environment in their growth and development. 2. the differences of each factor's meaning in each group as the differences of physical growth and development. 3. The general effects of each home background. 2. The reslut of the study. 1. In the upper group of standing height, the boy and girl student's brothers show significant difference of standing height at 5% level, and their sisters show significant difference of standing height at 1% level. 2. The boy and girl students of the upper group in standing height are heavier in their body weight than thos of the lower group. 3. The boy stduent's brothers and the girl student's sisters of the upper group in standing height are heavier in their body weight in proportion to their standing height. 4. In the boy students of the heavy group in their body weight: their fathers and brothers are also heavy, and in the girl student's case: their sisters are also heavy. 5. All family are light in weight in the group of light body weight. (p<0.01) 6. The girl students whose Rohrer's index is high also have high score of physical strength. (p<0.01) 7. The students of the home of which monthly in come is high are superior in their standing height and body weight than the students of the home of which monthly income is low. 8. In the parent's hereditary effects of standing height and body weight: father's effects are usually high(r=0.57) than mother's effects. 9. Among brothers and sisters, there are high correlation coefficient between standing height and body weight. (r=0.60) 10. The lower group in standing height have high correlation between standing height r=0.91 and body weight r=0.89 than the upper group. 11. Rohrer's index has higher correlation in body weight than standing height. 12. In the boy students group of which standing is tall: there are correlations between standing height and monthly income and food expenses in their home. (r=0.37) 13. There is high relation between the girl's body weight and food expenses in their home, but there are no relation between the girl's body weight and monthly income in their home. 14. There is correlation between the score of physical strength and parent's ages. (r=-0.38 r=-0.44) 15. In the heredity effects of family's physical distinctive features: father's effects are higher than mother's effects, and brother and sister's effects are higher than their parent's effects.