• Title/Summary/Keyword: 자연사

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An Immunohistochemical Study on Effect of Gastrodiae Rhizoma against Neuronal Apoptosis Following Intracerebral Hemorrhage in Rats (천마(天麻)가 뇌실질출혈 흰쥐의 신경세포 자연사에 미치는 영향에 대한 면역조직화학적 연구)

  • Song, Sang-Hoon;Lee, Joon-Suk;Shin, Jung-Won;Kim, Seong-Joon;Sohn, Nak-Won
    • Journal of Korean Medicine Rehabilitation
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    • v.21 no.4
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    • pp.1-12
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    • 2011
  • Objectives: This study was carried out in order to examine the effects of Gastrodiae rhizoma(GR) ethanol extract on neuronal apoptosis in intracerebral hemorrhage(ICH)-induced rats. Methods: ICH was induced by the stereotaxic intrastriatal injection of bacterial collagenase type VII in Sprague-Dawley rats. GR was orally given once a day for 3 days after ICH. Histological changes of the peri-hematoma regions were observed by cresyl vioIet staining. Bcl-2-associated X protein(Bax), B-cell blastoma 2(BcI-2) and terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling(TUNEL) expressions in the affected regions were performed by immunohistochemistry. Results: 1. GR reduced apoptotic bodies and swelling neurons in the peri-hematoma regions of ICH-induced rats. 2. GR significantly reduced TUNEL positive cells in the peri-hematoma regions of ICH-induced rats. 3. GR significantly reduced Bax positive cells in the peri-hematoma regions of ICH-induced rats. 4. GR did not influence Bcl-2 expression in the peri-hematoma regions of ICH-induced rats. Conclusions: These results suggest that GR has neuroprotective effects against ICH-induced apoptosis.

Strength and Modulus Relationship of Concrete for Rigid Pavement (포장용 콘크리트의 강도 및 탄성계수 상관관계식)

  • Yang, Sung-Chul;Park, Jong-Won
    • International Journal of Highway Engineering
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    • v.9 no.4
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    • pp.205-213
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    • 2007
  • Strength relationships are presented through experimental data from the concrete strength tests in this study. Various strength tests such as the compressive, flexural, and splitting tensile strength and the modulus of elasticity are included. An experimental work was performed to determine the various strength characteristics for various mix designs. Three different coarse aggregates such as granite, limestone, sandstone were used and included were fine aggregates such as natural sand, washed sand and crushed sand. Also included was cement amount as experimental variable. It was confirmed that each strength value with respect to curing time is to follow a typical strength development curve. With this somewhat reliable test results various strength relationships such as flexural strength-compressive strength, splitting tensile strength-compressive strength, modulus of elasticity-compressive strength, splitting tensile strength-flexural strength were analyzed through statistics. Experimental data were well fitted to the 0.5-power relationship of flexural strength and compressive strength which has been commonly accepted. The splitting tensile strength is expected to be best in the linear relationship from the flexural strength data. Finally splitting tensile strength was found to be proportional to the 0.87 power of the cylindrical compressive strength.

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Legal Grounds for Withholding or Withdrawal of Life-Sustaining Treatment (연명의료의 중단 - 대법원 2009.5.21. 선고 2009다17417 판결과 관련하여 -)

  • Suk, Hee-Tae
    • The Korean Society of Law and Medicine
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    • v.10 no.1
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    • pp.263-305
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    • 2009
  • Is it lawful to withhold or withdraw life-sustaining treatment applied to a patient in a terminal condition or permanent unconscious condition? In Korea, there are no such laws or regulations which control affairs related to the withholding or withdrawal life-support treatment and active euthanasia as the Natural Death Act or the Death with Dignity Act in the U. S. A. And in addition there has had no precedent of Supreme Court. Recently Supreme Court has pronounced a historical judgment on a terminal care case. The court allowed the withdrawal of life-sustaining treatment from a patient in a permanent unconscious state. Fundamentally the court judged that the continuation of that medical treatment would infringe dignity and value of a patient as a human being. And the court required some legal grounds to consider such withdrawal or withholding of medical care lawful. The legal grounds are as follow. First, the patient is in a incurable and irreversible condition and already entered a stage of death. Second, the patient executed a directive, in advance, directing the withholding or withdrawal of life-support treatment in a incurable and irreversible condition or in a terminal condition. Otherwise, at least, the patient's will would be presumed through his/her character, view of value, philosophy, religious faith and career etc. I regard if a patient is in a incurable and irreversible condition or in a terminal condition, the medical contract between a patient and a doctor would be terminated because of the actual impossibility of achievement of it's purpose. So I think the discontinuation of life-sustaining care would be legally allowed without depending on the patient's own will.

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A Development on the Cultural Products Using Dinosaur Characters (공룡 캐릭터를 이용한 문화상품 개발)

  • Lee, Kyung-A;Bae, Soo-Jeong
    • Journal of Fashion Business
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    • v.12 no.1
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    • pp.147-163
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    • 2008
  • This research aims to develop cultural products for professional sales after producing creative products utilizing dinosaur characters, which are the representative exhibited item of dinosaur-centered museum. There are seven museums in Korea whose theme is dinosaur. There are three dinosaur museums among them, Goseong Dinosaur Museum at Kyungnam, Mokpo Natural History Museum, and Seodaemun Museum of Natural History. While inspecting cultural products within the museum shops of these three museums, general products occupy more than 80% of all the products rather than products related to dinosaurs, and has a problem that most products are decorative ones. This resulted from that enterprises supplying these products are not professional ones and are irrelevent to cultural industry; as result, purpose of conveying culture through products is lost. This research develops dinosaur characters utilizing computer 3D techniques in order to imbue unique characteristics to dinosaur museums and informing cultural speciality of our country. In addition, this research presented design method of cultural products by grafting traditional symbols onto these characters, and actually produced 11 items of 5 kinds: toys(dolls), clothes(T-shirts, pajamas, socks), stationery(notebooks, memo), accessaries (bags, umbrellas, handkerchief), and others(cups). On the items above, dinosaur characters are variously utilized in form of printing, embroidery, and stickers by using computer 3D technique. A cultural product is a tangible form which could show variety of cultural characteristics of our nation that could spread the culture through the consumers, and such type of purchasing could increase values of cultural industry by creating economic profits; such points are the significance of this study.

A study of the formation of origin and the changed aspect on xian-Qin Huang-Lao philosophy (선진(先秦) 황노학(黃老學)의 형성기원(形成起源)과 변천양상(變遷樣相) 연구(硏究))

  • Kim, Yea-ho
    • The Journal of Korean Philosophical History
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    • no.36
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    • pp.203-233
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    • 2013
  • In this thesis, I consider the definition and category Huang-Lao philosophy that doesn't argue to the present in the academic world. I consider the origin and formation of Huang-Lao philosophy, in the view of combining the history of a nature and a human. I consider the origin of Huang-Lao philosophy in the Guoyu and Zuozhuan, Huang-Lao philosophy accepts open academic tradition of Jixia philosophy that has an ideological acception freely, and I consider the process of an advance and systematic theory of Huang-Lao philosophy on the basis of the four treatises of Guanzi and Hanfeizi. Also, in this thesis, I focus on the current of Huang-Lao philosophy, on the both sides. One is acception of Zhujia of Daojia the other is acception of Daojia of Zhujia(Fajia). and I analysis the various contents and forms between a peculiar world view and a political methodology of Wubuwei(無不爲) in Huang-Lao philosophy.

A study on the natural history virtual reality contents using depaysement (데페이즈망 기법을 활용한 자연사VR 콘텐츠 연구)

  • Park, Ki-Deok;Chung, Jean-Hun
    • Journal of Digital Convergence
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    • v.17 no.6
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    • pp.365-371
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    • 2019
  • In this study, VR contents were produced by using the rose which is the material of the tomb of the surrealistic work wrestler of Rene Magritte, an artistic genre, as a motive. In conclusion, the distortion (spatial modulation) of the image scale is connected to the dynamic-curve and texture-soft areas, and the superposition (combination of contradictory images) is called the big-size, irregular-depth area, Are connected to the positions of big-size and irregular-space regions. The theme of the work was Dream, and the plants and roses patterns were produced in each timeline, and overlap, scale, distortion, overlap, distortion, and scale were used.

Floristic study of Jogyesan Mt. (조계산의 식물상)

  • SUN, Eun-Mi;CHOI, Seung-Man;KIM, Byeol-Ah;SON, Hyun-Deok;HONG, Hang-Hwa;IM, Hyoung-Tak
    • Korean Journal of Plant Taxonomy
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    • v.48 no.4
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    • pp.331-356
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    • 2018
  • We investigated the flora of Jogyesan Mt. and discussed important vascular plants found on this mountain. In total, 16 separate field trips (20 days overall) were completed from 2013 to 2017. There are 577 taxa on Mt. Jogyesan, consisting of 115 families, 333 genera, 520 species, 8 subspecies, 45 varieties, and 4 forms. Eighteen endemic plants of Korea were found on Jogyesan Mt., including Carex okamotoi Ohwi, Coreanomecon hylomeconoides Nakai, and Stewartia koreana Nakai ex Rehder. There are 80 taxa of floristic regional indicator plants in total, including level V such as Adenophora palustris Kom. and level IV such as Dryopteris championii (Benth.) C. Chr. ex Ching, Gastrodia elata Blume, Lindera sericea (Siebold & Zucc.) Blume and Corylopsis glabrescens var. gotoana (Makino) T. Yamanaka. There also are 24 taxa of naturalized plants, including Ambrosia artemisiifolia L.

Present Status and Comparative Study on the Geological Natural Monuments of South and North Koreas (남·북한 지질분야 천연기념물의 현황과 비교)

  • Kim, Dong Hee
    • Korean Journal of Heritage: History & Science
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    • v.42 no.1
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    • pp.20-39
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    • 2009
  • Abstract This research is a comparative study on the geological natural monuments of South and North Koreas. The classification system on natural monuments between South Korea and North Korea is similar, but North Korea's designations are relatively well-balanced. The geology field of South Korea was composed of rocks, caves, fossils and general geology, whereas that of North Korea was subdivided into rocks, fossils, strata, mineral springs, hot springs, geography, waterfalls, lakes, caves and pools. Unlike South Korea, North Korea designates and preserves geological structures such as fold and fault, and representative outcrops of mine. It is suggested that South Korea has to establish natural monument management policies for preserving geological structures and outstanding outcrops of mine. The 47-year period of preserving natural monuments in South Korea was divided into the stages I (1962~1980), II (1981~1995) and III (1996~2008). The designated numbers of geological natural monuments in the stage I, II and III average 1.1, 0.1 and 2.6, respectively. The number of geological natural monuments in South Korea is highest in Jeju province, whereas that in North Korea is highest in Gangwon province. This implies that natural monuments have been well protected especially in the locality of slow urbanization.

Historic specimens collected from the Korean Peninsula in the early 20th century (II) (20세기초에 채집된 한반도 고표본 (II))

  • SUN, Eun-Mi;CHANG, Kae Sun;SON, Hyun-Duk;IM, Hyoung-Tak
    • Korean Journal of Plant Taxonomy
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    • v.49 no.3
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    • pp.240-252
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    • 2019
  • Many of the historic plant specimens collected on the Korean Peninsula in the early twentieth century were lost during the Korean War, though some of them were deposited in the herbarium of Tokyo University (TI) and thus remained unharmed. Data on historic Korean plant specimens at TI are very important given the lack of current data on North Korean plants. Moreover a number of unidentified Korean historic specimens are present at TI. We carried out an identification process and created a list of plants in a newly found collection held by Dr. Ikuma Yoichiro, a Japanese entomologist. He traveled from Cheongjin to Hyesanjin via Baekdu-san (Mt.) in August of 1913 and collected 240 species. We also secured one duplicate set.

Estimation and Classification of Flow Regimes for South Korean Streams and River

  • Park, Kyug Seo;Choi, Ji-Woong;Park, Chan-Seo;An, Kwang-Guk;Wiley, Michael J.
    • Proceedings of the Korea Water Resources Association Conference
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    • 2015.05a
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    • pp.106-106
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    • 2015
  • The information of flow regimes continues to be norm in water resource and watershed management, in that stream flow regime is a crucial factor influencing water quality, geomorphology, and the community structure of stream biota. The objectives of this study were to estimate Korean stream flows from landscape variables, classify stream flow gages using hydraulic characteristics, and then apply these methods to ungaged biological monitoring sites for effective ecological assessment. Here I used a linear modeling approach (MLR, PCA, and PCR) to describe and predict seasonal flow statistics from landscape variables. MLR models were successfully built for a range of exceedance discharges and time frames (annual, January, May, July, and October), and these models explained a high degree of the observed variation with r squares ranging from 0.555 (Q95 in January) to 0.899 (Q05 in July). In validation testing, predicted and observed exceedance discharges were all significantly correlated (p<0.01) and for most models no significant difference was found between predicted and observed values (Paired samples T-test; p>0.05). I classified Korean stream flow regimes with respect to hydraulic and hydrologic regime into four categories: flashier and higher-powered (F-HP), flashier and lower-powered (F-LP), more stable and higher-powered (S-HP), and more stable and lower-powered (S-LP). These four categories of Korean streams were related to with the characteristics of environmental variables, such as catchment size, site slope, stream order, and land use patterns. I then applied the models at 684 ungaged biological sampling sites used in the National Aquatic Ecological Monitoring Program in order to classify them with respect to basic hydrologic characteristics and similarity to the government's array of hydrologic gauging stations. Flashier-lower powered sites appeared to be relatively over-represented and more stable-higher powered sites under-represented in the bioassessment data sets.

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