• Title/Summary/Keyword: 오리과

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A REVISED CATALOGUE OF METEOR OUTBURSTS IN KOREAN, JAPANESE, CHINESE HISTORIES (한국, 일본, 중국의 역사 기록에 나오는 별똥만발 기록의 새로 고친 목록)

  • Ahn, Sang-Hyeon
    • Journal of Astronomy and Space Sciences
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    • v.22 no.3
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    • pp.293-310
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    • 2005
  • We made a revised catalogue for reliable records of meteor outbursts that were recorded in Korean, Japanese, and Chinese chronicles. In order to avoid the effects of both Earth's precession and perihelion shift, we introduced a new time-coordinate of records, or the number of days elapsed within the sidereal year of the record for a given origin of time or the perihelion passage time of the you 2000. We added nineteen new records of meteor showers that are wrongly classified i, individual meteors in a Chinese archive. We found that the ${\eta}-Aquarids,$ the Perseids, the Orionids, and the Leonids have been active during the last two millennia. Due to the change of time-coordinate, the oldest record of each long-lasting meteor shower has been slightly corrected. We discuss that these long-lasting meteor showers belong to the Halley-type comets.

12 CO, 13CO, AND C18 OBSERVATIONS TOWARD OMC-1 (OMC-1의 12 CO, 13CO, C18O의 관측)

  • 천문석;송혜정;손영종
    • Journal of Astronomy and Space Sciences
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    • v.19 no.1
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    • pp.7-18
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    • 2002
  • Interstellar cabon monoxide and its isotopes were observed with the 13.7m radio telescope of the Daeduk Radio Astronomy Observatory toward Orion Molecular Cloud-1 (OMC-1). We derive the excitation temperature, optical depth, column density, and isotopic abundance ratios from the observed lines of $^{12}CO,^{13}CO,\;and\;C^{18}O$ inside of the region of $11'{\times}11'$. The optical depths of $^{13}CO$ were obtained to be 0.1~0.4, while those of $C^{18}O$ to be 0.01~0.03. The isotopic ratios $^{12}C/^{13}C$ were also estimated to be 2~60. We could not find the radial isotopic ratio $^{12}C/^{13}C$ gradient in the OMC-1.

A Study on the Flora Mt. Hyangro-Bong (향로봉지역(香爐峰地域)의 식물상(植物相) 연구(硏究))

  • Park, Wan-Geun;Yoo, Seok-In;Park, Kwang-Seo
    • Journal of Forest and Environmental Science
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    • v.15 no.1
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    • pp.44-64
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    • 1999
  • The flora of vascular plants investigated in Mt. Hyangro-Bong was 450 taxa belonging to 86 families, 254 genera, 393 species, 2 subspecies, 51 varieties, 4 formae. Among the investigated vascular plants, Korean endemic plants (Carex okamotoi, Salix koriyanagi, Clematis chisanensis, Aconitum pseudo-laeve var. erectum, Viola diamantiaca, Sanguisorba hakusanensis, Vicia venosissima, Patrinia saniculaefolia, Hanabusaya asiatica, H. asiatica for. alba etc.) were 23 taxa; rare and endangered plants(Disporum ovale, Lilium distichum, Trillium kamtschaticum, Gastrodia elata. Clematis chisanensis, Rodgersia podophylla, Rosa marretii, Viola diamantiaca, Syringa wolfii, Hanabusaya asiatica etc.) were 17 taxa; naturalized plants(Dactylis glomerata. Poa pratensis, Rumex acetosella, Gypsophila oldhamiana, Lepidium apetalum, Oenothera odorata, Aster pilosus, Carduus crispus, Erigeron annuus, Taraxacum officinale etc.) were 14 taxa.

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An efficiency evaluation of Korean basketball league using 2010~2011 season data (2010~2011 시즌 자료를 활용한 프로농구 구단의 효율성 평가)

  • Choi, Kyoung Ho;Ahn, Jeong Yong
    • Journal of the Korean Data and Information Science Society
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    • v.24 no.3
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    • pp.505-513
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    • 2013
  • Basketball is one of the most popular winter sports in Korea. Korean basketball league has started in 1997 with 8 teams. Currently, there are 10 teams participating in it and the average number of spectators in 2010~2011 season reached 3,815. However, it has not been making good profit. It would be meaningful to analyze and evaluate the operational efficiency in order to provide basic information to improve the efficiency. This study used data envelopment analysis to figure out comparative efficiency of the teams in the Korean basketball league. As a result, Jeonjaland, LG, and KT were evaluated to be efficient teams and Orions, Ginseng, and Mobis were not.

Species Identification and Radiocarbon Dating for the Wooden Board from Daebudo Shipwreck No.2 Using Wiggle Matching (대부도2호선 목부재의 수종과 위글매치를 이용한 방사성탄소연대 분석)

  • Nam, Tae Gwang;Yoon, Yong Hee;Kim, Eung Ho
    • Journal of Conservation Science
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    • v.34 no.5
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    • pp.359-368
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    • 2018
  • The purpose of this study was to analyze the wood species of the stern plank and persimmon seed from Daebudo shipwreck No.2 excavated from Daebudo, Danwon-gu, Ansan-si, and Gyeonggi-do by wiggle-matching of radiocarbon measurements. Results of the analysis showed that all the wooden boards of the hull were made from Pinus Hard Pine Group. The other parts of hull and wooden pegs were made from Pinus Hard Pine Group, Castanea spp., Quercus spp. sect. Lepidobalanus, Alnus spp., and Zelkova serrata Makino. Excavated wide-tooth wooden comb and fine-tooth bamboo comb were made from Acer spp. and Bambusoideae. Excavated rope was made from Pueraria thunbergiana Benth. The stern plank, wooden support, and persimmon stone showed ${\pm}2{\sigma}$ radiocarbon date(95.4% confidence interval) of AD 1151-1224. This indicated that the Daebudo shipwreck No.2 occurred during the early or middle 12-13th century. Our radiocarbon dating results confirmed the date speculated by archeologists based on the ceramic style.

Spatial Autocorrelation within a Korean Population of Alnus hirsuta (한국내 물오리나무(Ainus hirsuta) 집단의 공간적 상관관계)

  • Park, Joo-Soo
    • Journal of Life Science
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    • v.14 no.2
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    • pp.345-350
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    • 2004
  • The present study was investigated microgeographic variations to spatial autocorrelation in the Korean alder, Alnus hirsuta. Separate counts of each type of join (combination of genotypes at a single locus) for each allele, and for each distance class of separation, were tested for significant deviation from random expectations by calculating the Standard Normal Deviation (SND). Moran's I was significantly different from the expected value in 24 of 120 cases (20.0%). 17 of these values (14.2%) were significantly negative, indicating genetic dissimilarity among pairs of individuals in the ten distance classes. Many Korean populations of alder are small and are distributed by men for firewood. This occasional cutting of seed-bearing stems may bring a high level of gene flow. In addition, stump sprouting ability also may contribute to the fact that the Chengkwang population at Gijang is unusual in lacking spatial genetic structure.

Freshwater algal flora and environmental factor at crater of Cheju parasite volcano (제주 기생화산 화구호의 환경과 식물성 플랑크톤상)

  • Kim, Eun-Hee;Lee, Ho-Won;Lee, Sang-Myung;Kang, Hyun-Mu
    • Journal of Wetlands Research
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    • v.4 no.1
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    • pp.1-19
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    • 2002
  • This study was carried out to provide basic data for biodiversity about phytoplankton at crater of Cheju parasite volcano from March to November 2000. In the study area, we identified 6 class 12 order 23 family 44 genus 87 species 13 variety 2 forma, Which were totally 102 taxa. Those were composed of 40 taxa(39.2%) of Chlorophyceae, 34 taxa(33.3%) of Bacillariophyceae, 14 taxa(l3.7%) of Canophyceae, 9 taxa(8.8%) of Euglenophyceae, 3 taxa(3.0%) of Dinophyceae, 2 taxa(2.0%) of Chrysophyceae, respectably. Monthly appearance of phytoplankton were 74 taxa on March, 46 taxa on May, 21 taxa on August, 22 taxa on November. Biodiversity of phytoplankton by station was 54 taxa in Moolchat, 22 taxa in Moolyoungari, 26 taxa in Mooljangauri, 12 taxa in Dongsuack, 6 taxa in Asungseang, 27 taxa in Samiaorum, respectably.

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The Character of Ethnic Make up by Observation of 21's Century Fashion Trend (21 세기 패션에 표현된 에스닉 메이크업의 특징에 관한 고찰)

  • Kim, Mi-Jung;Kim, Mi-Hyun
    • Korean Journal of Human Ecology
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    • v.16 no.5
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    • pp.1061-1068
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    • 2007
  • The study has sought to explore how fashion emerges as a comprehensive tool of dress for increasing its brand appeal and express one's artistic sense and fashion by using everything from make-up to hair to trappings. Therefore, when it comes to fashion trends reflected in collections, the study is designed to improve understanding of make-up as one of the elements of total fashion and to help create diverse ideas in expressing creative and free make-up that can help perfect fashion concept in harmony with all the other elements. The study has pondered upon collection, trends and fashion make-up through literature study, and has gathered image data via the Internet. It also has conducted analysis of Ethnic style reconstructed combining past and the future, East and the West, and futurism style using asymmetrical forms without no defined patterns and hi-tech textures, which emerges as a result of post-modernism. The results of the study are as follows. Ethnic fashion that pursues strange and exotic beauty is characterized by its simple and idyllic images of traditional costume in Asia or primitive clothes in Africa. Make-up represent images of matt and pale skin, tanned yellow, glossy and thickly powered squeaky white skin. Point make-up highlighted eye lines, red chick, small and voluptuous red lips. Hair and accessory seeks diversity combining various ethnic styles together such as oriental, Indian, Islam and Africa. In addition, future-oriented fashion of the 21st century, twists in texture, various kinds of materials and changes in technique help give impressions of freedom and bizarreness.

Isolation of Daucosterol and Naphthalene glucoside from Seeds of Cassia mimosoides var. nomame Makino (차풀 종자로부터 Daucosterol과 Naphthalene glucoside의 분리)

  • Park, Jun-Hong;Kwon, Sun-Jin
    • Korean Journal of Plant Resources
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    • v.22 no.1
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    • pp.26-30
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    • 2009
  • Daucosterol and naphthalene glycoside were isolated from the seeds of Cassia mimosoides var. nomame Makino. The isolated compounds were identified by spectral means including 1D, 2D-NMR and FAB-MS experiments. Daucosterol was characterized as ${\beta}$-sitosterol-3-O-${\beta}$-D-glucoside and naphthalene glucoside was done as 2-acetyl-3-methyl-6-methoxynaphthalene-1,8-diol 8-O-glucosyl-(1${\rightarrow}$6)-glucoside. These compounds were isolated for the first time from Cassia mimosoides var. nomame Makino.

The Flora of Forest Wetland in the Chungcheongbuk-do (충청북도 일대 산림습원의 관속식물)

  • Shin, Jae-Kwon;Byun, Jun-Gi;Kim, Ju-Yeong;Choi, Seung-ho;Kim, Dong-Kap
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2018.04a
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    • pp.48-48
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    • 2018
  • 본 연구는 우리나라 산림습원의 식물종 다양성을 보존하기 위한 일환으로 충북지역 산림습원 34개소에 분포하는 관속식물 현황을 파악하고자 수행하였다. 현지조사는 2017년 4월부터 10월까지 7개월 동안 수행하였다. 조사 결과 충북지역 산림습원에 분포하는 관속식물은 총 98과 312속 502종 5아종 71변종 587분류군으로 충북지역 전체 식물상 약 1,241분류군의(국립수목원 한국관속식물분포도, 2016) 47.3%로 나타났다. 습지에 출현하는 빈도에(수생태사업단 우리나라습지생태계 관속식물의 유형분류, 2012) 따라 구분한 결과 절대습지식물은 물꽈리아재비, 큰고양이수염, 통발, 벗풀, 올챙이고랭이, 택사 등 27분류군, 임의습지식물은 버드나무, 쉽싸리, 물억새, 이삭사초, 부처꽃, 비녀골풀, 솔발울고랭이, 양뿔사초, 진퍼리새 등 51분류군이다. 또한 습원과 육지에서 동시 출현하는 양생식물은 모시물통이, 왕미꾸리광이, 물양지꽃, 좀고추나물, 감자개발나물, 참삿갓사초 등 29분류군, 임의육상식물은 쇠뜨기, 고비, 고추나물, 방동사니, 강계큰물통이, 오리새, 처녀바디 등 25분류군, 절대육상식물은 애기탑꽃, 좀진고사리, 옥잠난초, 물들메나무, 뻐국나리, 진범, 범꼬리 등 88분류군으로 확인되었다. 특히 절대습지식물 중 애기물꽈리아재비, 큰고양이수염, 개쉽싸리, 통발, 송이고랭이, 올방개아재비, 흰고양이수염 등 11분류군은 충북내에서 새롭게 분포가 확인되었다. 산림청 지정 희귀식물은 양뿔사초(CR), 애기물꽈리아재비(VU), 통발(VU) 등 16분류군, 한국특산식물은 키버들, 강계큰물통이, 물들메나무, 넓은잎각시붓꽃 등 19분류군이다. 식물구계학적 특정식물로는 V등급 통발 등 3분류군, IV등급 왜방풍 등 9분류군, III등급 음양고비 등 18분류군, II등급 12분류군, I등급 30분류군이 확인되었다. 외래식물은 큰닭의덩굴, 미국자리공, 붉은서나물 등 27분류군으로 나타났다.

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