• Title/Summary/Keyword: newly described

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Morphological characteristics and distribution of Korean endemic Chrysosplenium flaviflorum Ohwi (한국특산 누른괭이눈(Chrysosplenium flaviflorum Ohwi)의 형태적 특성 및 분포)

  • Han, Jong-Won;Yang, Sun-Gyu;Kim, Hyun-Jun;Jang, Chang-Gee;Kang, Shin-Ho
    • Korean Journal of Plant Resources
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    • v.23 no.5
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    • pp.480-485
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    • 2010
  • This study reports on the morphological characteristics and distribution for conservation and practical use in the Korean Peninsula of Chrysosplenium flaviflorum through a comparison with relative species. The morphological characters that were newly investigated in this study included subhypogaeus stolons and glabrous on the surface of leaves. The former has not been described by any taxonomist who had previously treated this species with the exclusion of Hara. Despite this, the latter is a very important key to using the identification of varieties of Ser. Pilosa though there were no descriptions which included Ohwi. C. flaviflorum Ohwi which was endemic and known to be distributed only in the northern area of the Korean Peninsula, was also observed in the Gapyeong-gun, Gyeonggi-do, Cheorwon-gun, Gangwon-do, and Yeongdonggun, Chungcheongbuk-do middle area since the latest collection report in 1943. There is a requirement for further study to be conducted on the distribution and management by designation for the Special Plant Species by the Korean Ministry of Environment.

The Study on Application of Activity-Based Costing System on the Department of Clinical Pathology (임상병리과의 활동기준원가 관리 적용에 관한 연구)

  • Jung, Soo-Kyung;Jung, Key-Sun;Choi, Hwang-Gue;Rhyu, Kyu-Soo
    • Korea Journal of Hospital Management
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    • v.5 no.1
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    • pp.129-155
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    • 2000
  • This empirical study, activity-based costing, a newly introduced approach that has proved to be an improvement over the conventional costing system in product or service costing, is applied at department of clinical pathology in K university hospital. The study subjects were 233 test procedures done in clinical laboratory of K university hospital. Activity analysis was done by interview, questionnaires, and time study, and the amount of resources consumed by each activity and their costs are then traced and applied to the laboratory tests. The main purpose of this study were to compare the test costs of activity-bases costing with those of conventional costing, and test fees of medical insurance, and to provide accurate cost informations for the decision makers of hospital. The major findings of this study were as belows. 1. The cost drivers for application of activity-based costing at clinical laboratory were cases of sample collection, case of specimen, cases of test, and volume-related allocation bases such as direct labor hours and total revenue of each test. 2. The profits of each clinical laboratory fields analyzed by conventional costing were different from the profits analyzed by activity-based costing, especially in the field of Urinalysis(approximately over estimated 750%). 3. The standard full costs by conventional costing were quite different from the costs computed by using activity-based costing, and the difference is most significant with the tests of long labor time. 4. From the comparison between costs computed by using activity-based costing and medical insurance fees, some test fees were significantly lower than the costs, especially in the non-automated fields. As described in this study, activity-based costing provides more accurate cost information than does conventional costing system. The former approach is especially important in the health care industry including hospitals in which planning and controlling the costs services provided are the key to maintaining a healthy financial status for the organization. Despite the contribution of activity-based costing the economic as well as technical feasibilities of implementing such a cost accounting system in an organization must be evaluated. In the development of activity-based costing systems, an activity analysis has to be conducted to identify activities that consume resources. This involves a detailed study of the organization's logistics and accounting information systems, and it is an expensive project in itself. Besides, it can be quite difficult and time consuming to identify and trace resource consumption to a specific activity. Thus the activity-based costing system should be implemented only when the decrease in cost of error far exceeds the increase in cost of measurement. By combining activity-based costing with standard costing, health care administrators can better plan and control the costs of health services provided while ensuring that the organization's bottom line is healthy.

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A Study on the Dominant Driving Force of Plate Movement presented in the High School Earth Science Textbooks (고등학교 지구과학 교과서에 제시된 판 이동의 주된 원동력에 대한 고찰)

  • Jeon, Taehwan;Seo, Ki-Weon;Lee, Gyuho
    • Journal of the Korean earth science society
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    • v.37 no.1
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    • pp.62-77
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    • 2016
  • In the early model of plate tectonics, the plate was depicted as a passive raft floating on the convecting mantle and carried away by the mantle flow. At the same time, ridge push at spreading boundaries and drag force exerted by the mantle on the base of lithosphere were described as the dominant driving forces of plate movements. However, in recent studies of plate tectonics, it is generally accepted that the primary force driving plate motion is slab pull beneath subduction zones rather than other forces driven by mantle convection. The current view asserts that the density contrast between dense oceanic lithosphere and underlying asthenosphere is the substance of slab pull. The greater density of oceanic slab allows it to sink deeper into mantle at trenches by gravitational pull, which provides a dominant driving force for plate motion. Based on this plate tectonics development, this study investigated the contents of plate tectonics in high school Earth Science textbooks and how they have been depicted for the last few decades. Results showed that the early explanation of plate movement driven by mantle convection has been consistently highlighted in almost all high school textbooks since the 5th curriculum, whereas most introductory college textbooks rectified the early theory of plate movement and introduced a newly accepted theory in revised edition. Therefore, we suggest that the latest theory of plate tectonics be included in high school textbooks so that students get updated with recent understanding of it in a timely manner.

A Case of Nonspecific Interstitial Pneumonia Associated with Systemic Lupus Erythematosus (전신성 홍반성 낭창에 병발된 비특이성 간질성 폐렴 1예)

  • Lee, Ho-Moeng;Hwang, Jae-Kyung;Park, Gae-Young;Park, Jeong-Woong;Park, Jae-Kyung;Jeong, Seong-Hwan;Nam, Gui-Hyun;Lee, Jae-Woong;Ha, Seung-Yeon;Lee, Han-Kyung
    • Tuberculosis and Respiratory Diseases
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    • v.50 no.6
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    • pp.732-739
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    • 2001
  • Systemic lupus erythematosus frequently has thoracic involvement among connective tissue diseases. One of the pleuropulmonary manifestations is diffuse interstitial lung disease including nonspecific interstitial pneumonia(NSIP). NSIP is a newly classified disease among interstitial lung diseases. Systemic lupus erythematosus has a better prognosis than usual interstitial peumonia(UIP) and responds well to steroids. In this report, a 34 year-old woman who complained of a dry cough, and exertional dyspnea for 2 months is described. The chest X-ray showed fine reticular opacities and a mild honeycomb appearance in both basal lungs. High resolution computed tomography(HRCT) showed bilateral patchy areas of ground-glass attenuation and a mild honeycomb appearance in the subpleural of both the lower and the middle portion of the lung fields. An open lung biopsy showed prominent lymphocytic interstitial inflammation and fibrosis with small areas with a honeycomb appearance. This case was diagnosed as NSIP associated with systemic lupus erythematosus and was managed with oral steroids. Here we report a case of nonspecific interstitial pneumonia associated with systemic lupus erythematosus confirmed by HRCT and an open lung biopsy with a review of the relevant literature.

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Development of the Eggs and Pre-Leptocephalus Larvae by Natural Spawning of Artificially-Matured Japanese Eel, Anguilla japonica (인위적 성숙 유도된 뱀장어 Anguilla japonica의 자연산란에 의한 난발생과 Pre-leptocephalus 자어의 발달)

  • Kim, Dae-Jung;Kang, Eon-Jong;Bae, Jun-Young;Park, Min-Woo;Kim, Eung-Oh
    • Journal of Aquaculture
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    • v.20 no.3
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    • pp.160-167
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    • 2007
  • Embryonic and pre-leptocephalic larvae development of the eel, Anguilla japonica, are described following natural fertilization in the indoor tank of $23^{\circ}C$ water temperature. Following a routine hormone treatment technique for the brood stock, female eels were artificially matured by weekly intramuscular injections of salmon pituitary extracts (SPE) at a dosage of 20 mg/kg body weight (BW) for a total of 10-14 doses to induce ovarian maturation, while male eels received weekly intramuscular injections of human chorionic gonadotropin (HCG) at a dosage of 1 IU/g BW for a total of 6-10 doses to induce testicular maturation in a separate aquarium and induced natural spawning. Fertilized eggs of about 1.0 mm in diameter were pelagic and showed a typical discoidal cleavage. Hatching occurs 38 hrs after fertilization at a water temperature of $23^{\circ}C$. The newly hatched larvae measured about 3.0 mm in total length and the number of myomeres averages 42. Their mouths and anuses were opened at 4.5 days and the yolk sacs of the pre-leptocephalic larvae were almost absorbed at 6.5 days after hatching. Pre-leptocephalic larvae survive for 14.5 days. At this time they are $5.87{\pm}0.25mm$ in total length and have about 98 myomeres. However, morphological characterization of embryonic and pre-leptocephalic larvae were not different between natural fertilization and artificial fertilization by the dry method.

A Study on the Root-knot Nematodes (Meloidogyne spp.) Affecting Economic Crops in Korea (경제작물에 영향을 미치는 뿌리혹 선충에 관한 연구)

  • Choi Y. E.;Choo H. Y.
    • Korean journal of applied entomology
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    • v.17 no.2 s.35
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    • pp.89-98
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    • 1978
  • A study on the root-knot nematodes (Meloidogyne spp.) affecting economic crops in Korea was undertaken to know the distribution of the nemic fauna. Total 66 samples were taken from soil and root of 24 host plants at different localities in 4 provinces. Four Meloidogyne species such as Meloidogyne hapla, Meloidogyne arenaria, Meloidogyne incognita and Meloidogyne javanica were identified and some morphological characteristics were described. One of these, Meloidogyne javanica was reported newly in Korea from Horticultural Experimental Station, Suweon, Gyeong Gi on potato, Geomsadong, Daegu on chinese cabbage, Sangeogdong, Daegu, Gyeong Bug on violet and Choeumri, Namhae, Gyeong Nam on pumpkin. In Jae Ju province, Meloidogyne incognita was only found except the other three species. The most common and widely distributed Meloidogyne species in Korea is Meloidogyne hapla by $50\%$ in total, next Meloidogyne incognita $33.3\%$ Meloidogyne arenaria $10.6\%$ Meloidogyne javanica $6.0\%$ in turn, The root-knot nematodes infected the most severely in Jae Ju province and Gyeong Nam, Gyeong Bug and Gyeong Gi province in turn. Twenty four plants were attacked by root-knot nematodes among them important economic crops are soybean, peanut, potato, tomato, cucumber, carrot, pumpkin, wateremelon, edible burdock, pepper, eggplant, cabbage, lettuce and tobacco in Korea.

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Electrical Characteristics Measurement of Eddy Current Testing Instrument for Steam Generator in NPP (원전 증기발생기 와전류검사 장치의 전기적 특성 측정)

  • Lee, Hee-Jong;Cho, Chan-Hee;Yoo, Hyun-Joo;Moon, Gyoon-Young;Lee, Tae-Hun
    • Journal of the Korean Society for Nondestructive Testing
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    • v.33 no.5
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    • pp.465-471
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    • 2013
  • A steam generator in nuclear power plant is a heatexchager which is used to convert water into steam from heat produced in a nuclear reactor core, and the steam produced in steam generator is delivered to the turbine to generate electricity. Because of damage to steam generator tubing may impair its ability to adequately perform required safety functions in terms of both structural integrity and leakage integrity, eddy current testing is periodically performed to evaluate the integrity of tubes in steam generator. This assessment is normally performed during a reactor refueling outage. Currently, the eddy current testing for steam generator of nuclear power plant in Korea is performed in accordance with KEPIC & ASME Code requirements, the eddy current testing system is consists of remote data acquisition unit and data analysis program to evaluate the acquired data. The KEPIC & ASME Code require that the electrical properties of remote data acquisition unit, such as total harmonic distortion, input & output impedance, amplifier linearity & stability, phase linearity, bandwidth & demodulation filter response, analog-to-digital conversion, and channel crosstalk shall be measured in accordance with the KEPIC & ASME Code requirements. In this paper, the measurement requirements of electrical properties for eddy current testing instrument described in KEPIC & ASME Code are presented, and the measurement results of newly developed eddy current testing instrument by KHNP(Korea Hydro & Nuclear Power Co., LTD) are presented.

Identification and Characteristics of Sclerotinia homoeocarpa Causing Dollar Spot Disease in Zoysiagrass (한국잔디에 발생한 달라스팟 병의 주요 원인균인 Sclerotinia homoeocarpa의 동정 및 특성)

  • Park Dae-Sup;Kim Kyong-Duck;Yeom, Su-Rip;Oh Byung-Seog;Park Byoung-Sun
    • Asian Journal of Turfgrass Science
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    • v.19 no.2
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    • pp.85-94
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    • 2005
  • A fungal isolate was newly collected from Zoysiagrass 'Anyang-Joongji' in small circular patches on a fairway ofa golf course in Korea, which seriously occurred during the early summer period of 2005. The isolate presented on PDAmedium, named Scz1, was closely identical to Sclerotinia homoeocarpa, a casual fungus of dollar spot disease, in cool season turf grasses such as creeping bentgrass. Hereby, this study was accomplished to characterize the isolate and compare it with the fungus, named Scb1, isolated from dollar spot-infected creeping bentgrass (Agrostis palustris Huds. cv Penncross). On PDAmedium, individual mycelial appearance of three isolates was very similar except for the pigment. Mycelial pigments of Scz1 and Scz2 (another analogous isolate collected) were light pinkish on the reverse side of PDA medium but that of Scb1 was dark brownish. In a microscopic study, three isolates were barely distinguishable in the appearance of mycelia. As expected, in the temperaturesensitivity assay, all pathogens were very delicate to $32^{circ}C$ above but not to $30^{circ}C$ below, in which was explained to be one of typical characteristics in S. homoeocarpa. In an artificial inoculation assay, disease symptoms including leaf spots in Zoysiagrass were appeared within 6-7 days after inoculation through the hand inoculation method with the isolate-infested soil. Then the fungus was re-identified from the infected leaf tissues. Interestingly, inoculation of isolate Scz1 gave rise to distinct symptoms in only Zoysiagrass but not in creeping bentgrass 'Penncross' and Kentucky bluegrass 'Midnight'. The observation might be involved in host specific pathogenecity of S. homoeocarpa Scz1 to Zoysiagrass. In a chemical sensitivity assay for the isolate, Scz1, showed a high mycelial inhibition against two fungicides, iprodione and propiconazole. All results described above suggest that S. homoeocarpa Scz1 is a primary pathogen of Zoysia dollar spot disease.

Ascending Aortic Rupture in a Young Woman with Loeys-Dietz Syndrome: The First Case Report in Korea (Loeys-Dietz 증후군으로 진단된 젊은 여자 환자의 상행 대동맥 파열: 국내 첫 번째 증례 보고)

  • Kim, Hwan-Wook;Lee, Taek-Yeon;Moon, Duk-Hwan;Choo, Suk-Jung;Chung, Cheal-Hyun;Lee, Jae-Won
    • Journal of Chest Surgery
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    • v.42 no.5
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    • pp.639-644
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    • 2009
  • Characterized by unique phenotypic features such as aortic aneurysm/dissection, hypertelorism, bifid uvula/cleft palate and generalized tortuosity in the arterial system, Loeys-Dietz syndrome is a newly described aggressive connective tissue disorder associated with mutation in the gene encoding transforming growth factor-$\beta$ receptor type I or type II. Some phenotypic manifestations of Loeys-Dietz syndrome overlap with those of Marfan syndrome or Ehlers-Danlos syndrome type IV. However, due to its more malignant pathophysiologic nature, physicians should be alert to Loeys-Dietz syndrome. High suspicion, early diagnosis, preventive surgery and serial imaging assessments are warranted for optimal management of Loeys-Dietz syndrome. We present here a case of a young patient with Loeys-Dietz syndrome who had aortic rupture, bifid uvula and hypertelorism. We also present a review of the medical literature.

Laboratory and Full-scale Testing to Investigate the Performance of Rock Fall Protection System with Hexagonal Wire Net (육각 낙석방지망의 성능평가를 위한 실내 및 실대형실험)

  • Youn, Ilro;Oh, Sewook;Kwon, Youngcheul
    • Journal of the Korean GEO-environmental Society
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    • v.15 no.9
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    • pp.69-75
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    • 2014
  • Rock fall protection system installed against rock slope is one of the most conventional way to protect nearby infra structures. Despite of wide application of typical rectangular nets, virtually installed to protect rock slope face, several problems have also been pointed out up to date. Rectangular draped nets are vulnerable to a sudden external shock such as rock fall, because it doesn't have any systematical buffers or shock absorbers. Furthermore, it has been widely recognized from the some cases of rock fall accident in Korea that rock fall protection nets cause wide range of failure in the rock slope faces due to insufficient pullout bearing capacity of fixing parts. Therefore, in this study, we tried to make a consideration about the problems of existing standard rock fall protection nets in Korea, and develop a new type of hexagonal net with a shock absorber based on design rock fall energy. In this paper, laboratory and full scale test procedure is described to analysis the performance of newly developed hexagonal rock fall net, and the key results are presented and discussed.