• Title/Summary/Keyword: 국립과학관

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Development of Prediction Model for the Na Content of Leaves of Spring Potatoes Using Hyperspectral Imagery (초분광 영상을 이용한 봄감자의 잎 Na 함량 예측 모델 개발)

  • Park, Jun-Woo;Kang, Ye-Seong;Ryu, Chan-Seok;Jang, Si-Hyeong;Kang, Kyung-Suk;Kim, Tae-Yang;Park, Min-Jun;Baek, Hyeon-Chan;Song, Hye-Young;Jun, Sae-Rom;Lee, Su-Hwan
    • Korean Journal of Agricultural and Forest Meteorology
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    • v.23 no.4
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    • pp.316-328
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    • 2021
  • In this study, the leaf Na content prediction model for spring potato was established using 400-1000 nm hyperspectral sensor to develop the multispectral sensor for the salinity monitoring in reclaimed land. The irrigation conditions were standard, drought, and salinity (2, 4, 8 dS/m), and the irrigation amount was calculated based on the amount of evaporation. The leaves' Na contents were measured 1st and 2nd weeks after starting irrigation in the vegetative, tuber formative, and tuber growing periods, respectively. The reflectance of the leaves was converted from 5 nm to 10 nm, 25 nm, and 50 nm of FWHM (full width at half maximum) based on the 10 nm wavelength intervals. Using the variance importance in projections of partial least square regression(PLSR-VIP), ten band ratios were selected as the variables to predict salinity damage levels with Na content of spring potato leaves. The MLR(Multiple linear regression) models were estimated by removing the band ratios one by one in the order of the lowest weight among the ten band ratios. The performance of models was compared by not only R2, MAPE but also the number of band ratios, optimal FWHM to develop the compact multispectral sensor. It was an advantage to use 25 nm of FWHM to predict the amount of Na in leaves for spring potatoes during the 1st and 2nd weeks vegetative and tuber formative periods and 2 weeks tuber growing periods. The selected bandpass filters were 15 bands and mainly in red and red-edge regions such as 430/440, 490/500, 500/510, 550/560, 570/580, 590/600, 640/650, 650/660, 670/680, 680/690, 690/700, 700/710, 710/720, 720/730, 730/740 nm.

Isolation and characterization of 6 unrecorded Pseudomonas spp. from Korean soil (토양에서 분리한 국내 미기록종 Pseudomonas 속 6종의 생화학적 특성과 계통 분류)

  • Kim, Hyun-Joong;Jung, You-Jung;Kim, Hae-Yeong;Hur, Moonsuk
    • Korean Journal of Microbiology
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    • v.55 no.1
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    • pp.39-45
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    • 2019
  • In 2017, as a study to discover indigenous prokaryotic species in Korea, a total of 6 bacterial strains assigned to the genus Pseudomonas were isolated from soil. From the high 16S rRNA gene sequence similarity (${\geq}99.5%$) and phylogenetic analysis with closely related species, the isolated strains were identified as independent Pseudomonas species which were unrecorded in Korea. The six Pseudomonas species were Pseudomonas mandelii, P. canadensis, P. thivervalensis, P. jessenii, P. lurida, and P. brenneri. Gram reaction, culture conditions, colony and cell morphology, basic physiological and biochemical characteristics are described in the species description section.

Study on the Production Method of the Gilt-bronze Crown Excavated from Ipjeom-ri Tomb 1, Iksan (익산 입점리 1호분 출토 금동관의 제작기법 연구)

  • Lee, Youngbeom
    • Conservation Science in Museum
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    • v.20
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    • pp.1-12
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    • 2018
  • In February 1986, a high-school student reported the discovery of fragments of gilt-bronze burial goods on a mountainside behind a village in Ipjeom-ri, Ungpo-myeon in Iksan. The National Research Institute of Cultural Heritage immediately undertook an excavation. Unfortunately, gilt-bronze relics including a band and vertical decorations for a crown, a hat, and shoes had already been collected from Ipjeom-ri Tomb 1 by the student who found them before they could be properly excavated. Also, the interior of the stone chamber of the tomb had been severely disturbed by the time of excavation, making it difficult to identify the precise original locations of the relics within the tomb and hindering the reassembly of the fragments of the gilt-bronze crown. After conservation treatment, the gilt-bronze hat, shoes, and other relics were restored to their original forms and researchers were able to identify incised designs of a three-legged bonghwang(鳳凰), fish scales, lotus flowers, and other motifs. This study presents the major features of the fragments of gilt-bronze relics from Ipjeom-ri Tomb 1 and the methods of their production in order to provide basic material for their restoration and allow the eventual restoration of the giltbronze crown to its original condition.

The Genus Cameraria Chapman, 1902 (Lepidoptera: Gracillariidae: Lithocolletinae), New to Korea (한국미기록 Cameraria속(屬) (나비목(目): 가는나방과(科): 가는나방아과(亞科))의 3미기록종(未記錄種) 보고)

  • Kim, Da-Som;Ahn, Neung-Ho;Byun, Bong-Kyu
    • Korean journal of applied entomology
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    • v.61 no.2
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    • pp.313-318
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    • 2022
  • In this study, the genus Cameraria Chapman, 1902 belonging to the family Gracillariidae is reported for the first time from Korea, with three newly recorded species, Cameraria acericola Kumata, 1963, C. hikosanensis Kumata, 1963 and C. niphonica Kumata, 1963. All the known Korean species are enumerated with their available information. Adults and genitalia of all species are redescribed and illustrated.

Marine Benthic Algal Community at Dadohaehaesang National Park, South-west Coast of Korea (남서해안 다도해해상국립공원 해조군집)

  • OH, Byoung Geon;Ahn, Jung Kwan
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.54 no.1
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    • pp.101-106
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    • 2021
  • The marine algal flora and community structure of Dadohaehaesang National Park, the Southwestern coast of Korea, were investigated monthly during May, July and September 2012. As the results, a total of 86 species including 10 greens, 17 browns and 59 reds was identified, except for blue-greens and crustose reds. The seaweeds that commonly appear during the investigation period are the green algae Ulva australis, the brown algae Ishige okamurae, Myelophycus simplex, Sargassum fusiforme and S. thunbergii and the red algae Gelidiophycus freshwateri, Gelidium. elegans, Corallina officinalis, C. pilulifera, Caulacanthus ustulatus, Ahnfeltiopsis flabelliformis, and Chondrus ocellatus. In Jodo district (Yemiri, Changuri), Ulva australis and Gloiopeltis furcata were dominant species in May, Sargassum fusiforme and Ulva australis were dominant in July, and Gelidiophycus freshwateri and Ulva australis were dominant in September. In Soan/Cheongsan district (Hwaheungpo, Jungdori), Gloiopeltis tenax and Chondracanthus tenellus were dominant species in May, and Gloiopeltis tenax and Chondracanthus tenellus were dominant in July as well as in the spring. And the Caulacanthus ustulatus and Corallina sp. were dominant species in September.

Evaluation of the contamination Level of Inland Pollution Sources Flowing into Taeanhaean National Park in Summer and Fall (2017-2018) (태안해안국립공원 연안으로 유입되는 하계-추계 육상오염원의 오염도 평가(2017~2018))

  • Hwang, Da Hye;Kim, Jin Hyun;Jang, Seong Geon;Jeong, Won ok;Jeong, Byungkwan
    • Journal of Environmental Science International
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    • v.31 no.6
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    • pp.491-501
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    • 2022
  • This study evaluated the contamination levels of inland pollution sources flowing into Taeanhaean National Park. The nutritional status of influents was assessed by analyzing water quality and trophic status index (TRIX) at 52 stations, and the contamination levels of sediments were evaluated by analyzing eutrophication cleanup index (CIET) and heavy metals at 36 stations. The results of the TRIX analysis showed that 26 of the 52 stations had influents with a TRIX value of 6-10 (poor water quality/very high trophic level), indicating atrocious water quality and high eutrophication levels. The results of the CIET analysis showed that 4 out of the 36 stations were highly contaminated with organic matter. Analysis of heavy metals showed that the copper (Cu) and zinc (Zn) levels exceeded the threshold effects level (TEL) and probable effects levels (PEL) at several stations. In addition, the arsenic (As) level exceeded the threshold effects level at one station, and the levels of the other heavy metals (Cd, Cr6+, Ni, Pb, and Hg) were lower. Most inland pollution sources have been identified as small-scale, but long-term and continuous exposure can negatively affect the marine ecosystem; therefore, it necessary to prepare inland pollution source management standards and measures suitable for the characteristics of the coastal area.

현장취재 - 우리맛닭, 그 가능성과 과제를 만나다 - 실용화에 접어든 '우리맛닭' -

  • Kim, Su-Yeong
    • KOREAN POULTRY JOURNAL
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    • v.41 no.9
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    • pp.102-105
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    • 2009
  • 농촌진흥청 국립축산과학원(원장 라승용)은 지난 15년간의 재래닭 수집과 순계 복원, 연구 및 개량을 통해 '우리맛닭'을 탄생시켰다. 재래닭 복원 프로젝트는 1994년부터 1997년까지 4년간 대한양계협회에서 '재래닭육용화 사업'의 일환으로 서울대학교 오봉국 박사(본회 고문)의 진두지휘 하에 대학교 수 16명, 연구관 8명 등 연인원 84명과 9억2천만원의 예산이 투입되어 진행됐으며, 11개의 과제를 수행해 마침내 재래닭 순계 복원에 성공하였다. 연구진은 이후 연구 결과물을 축산과학원으로 이관하여 후속연구를 지속토록 하였으며, 축산과학원은 이로부터 우수한 실용계를 생산하는 연구에 착수하게 됐다. 이러한 과정을 거쳐, 경제적으로 불리한 기존 재래닭의 문제점을 보완하여 산란성과 산육성이 우수한 닭으로 개발한 것이 바로 '우리맛닭'이다. '우리맛닭'은 축산과학원이 보유한 9개 순계 모군으로부터 성장이 빠른 부계통과 맛이 좋고 알 생산이 많은 모계통의 교잡을 통해 맛이 좋고 성장이 빠른 실용계로 생산된다. '우리맛닭'은 콜라겐 함량이 높아 탄력감과 쫄깃한 느낌의 육질을 지니고 있으며, 이를 접하는 소비자들의 반응도 좋게 나타나 그 가능성이 긍정적으로 점쳐지고 있다.

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Effects of the Planetarium Lesson on Students' Understanding of Astronomical Concepts (천체투영관 수업이 학생들의 천문 개념 이해에 미치는 효과)

  • Kim, Wansoo;Shim, Hyunjin
    • Journal of Science Education
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    • v.42 no.1
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    • pp.49-65
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    • 2018
  • Astronomy is the subject that can easily draw students' interest in studying science, therefore plays an important role in developing scientific core competence. However, it is difficult to develop spatial thinking that is required in understanding astronomical concepts through the classroom lessons. Planetarium, along with the science museum, is one of the most representative informal educational institution where astronomical concepts can be taught beyond time and space constraints. In this study, we developed the astronomy education program that is operated in the planetarium and applied the program to the elementary, middle and high-school students to investigate the effects of the planetarium lesson compared to the classroom lesson. The duration of this research was about 8 months, and the number of the students involved is 761, including participants of the 1 night and 2 days camps in the Daegu National Science Museum. The newly developed planetarium lesson is comparable to the previous classroom lesson of which topics are cardinal points, constellation, and the rotation of the earth. Test items were developed to evaluate the understanding of the astronomical concepts. The study was conducted based on the pre- and post-test with non-equivalent groups design comparing classroom and planetarium lessons. The results of this study are as follows. First, planetarium lesson is more effective for understanding astronomical concepts such as the cardinal points, earth's rotation, and the constellation than classroom lesson. Second, planetarium has a positive effect irrespective of gender and previous knowledge. Third, planetarium for high school students has the same effect as additional observation activities followed by the classroom instruction. Therefore, planetarium can be used as an alternative, effective tool when night observation is not available. In summary, planetarium is an effective tool that helps students to understand the astronomical concepts.

Motivational Factors Influencing Visitors' Satisfaction - Moderating Effects on Tourism Involvement - (지역축제 방문동기의 만족영향 요인 -관여도 조절효과 -)

  • Shin, Hyun-Bae;Kim, So Yun;Park, Duk-Byeong
    • Journal of Agricultural Extension & Community Development
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    • v.26 no.1
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    • pp.17-30
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    • 2019
  • Tourism motivation and involvement are important variables influencing visitors satisfaction. The study aims to identify the factors influencing visitors' satisfaction. Particularly, the study examine the moderating effects on tourism involvement between tourism motivation and visitors' satisfaction. Data were collected from 430 usable questionnaires among visitors of Gigisi local festival. Results of a factor analysis yielded three dimensions of tourism motivation which are family and local food, recreation and escape, and social factor. Results show that social factors among three dimensions of sense of community have significance for visitors satisfaction. And tourism involvement has a negative interactional effects as a moderator between recreation and escape motivation and involvement. It means that even though higher recreation and escape motivation, less likely to have visitors satisfaction if visitors have higher involvement in local festival. It was suggested that tourism motivation and involvement should be considered in local festival management and policy.

Research and Development of Interactive Exhibition Contents for 'Sound Light' Exhibition Space in Science Museum (과학관 '소리 빛' 전시공간, 체험형 인터랙션 전시 콘텐츠 연구 개발)

  • Kim, Tae-Wook;Park, Nam-Ki
    • Journal of the Korea Convergence Society
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    • v.11 no.7
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    • pp.137-144
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    • 2020
  • Based on the basic concepts and roles of the Science Museum, the research and development of the "Sound Light" interaction exhibition contents and experience exhibition space aimed at providing the exhibition, education and experience of scientific principle directly related to daily life will be implemented in the "Sound Light" exhibition space of the Gwangju National Science Museum. The scope of the research is to define the conditions and elements of the museum's hands-on exhibition by examining the case and status of the existing science museum's experience-type content prior research, and research and development of experience-type exhibition scenarios and contents for children based on them. The results of this research and development content are firstly developed with the theme of light and sound as interactive hologram experience content. Second, by multi-faceted media facade through projection mapping by multiple projectors, visual wide and spectacular screen composition and animation are realized. Third, visitors-oriented exhibitions and experiences that can interact with visitors by moving various colors and sounds together. Finally, interactive content is provided through hologram interfaces through hologram screens to encourage active participation of many visitors in viewing rather than simply delivering exhibition information and to promote revisiting the exhibition. Through a series of studies, it was possible to research and develop contents and experience exhibition spaces with theme park characteristics, which are the trend of science museums.