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Yun, Dong-Jin,Kim, Seyun,Jung, Changhoon,Lee, Chang-Seok,Sohn, Hiesang,Won, Jung Yeon,Kim, Yong Su,Chung, JaeGwan,Heo, Sung,Kim, Seong Heon,Seol, Minsu,Shin, Weon Ho The Royal Society of Chemistry 2018 Physical chemistry chemical physics Vol.20 No.4
<P>Correction for ‘Direct characterization of graphene doping state by <I>in situ</I> photoemission spectroscopy with Ar gas cluster ion beam sputtering’ by Dong-Jin Yun <I>et al.</I>, <I>Phys. Chem. Chem. Phys.</I>, 2018, 20, 615-622.</P>
최동은, 김원태, 김용준, 윤석중, 이상철, 김원재 충북대학교 의과대학 충북대학교 의학연구소 2012 忠北醫大學術誌 Vol.22 No.1
연구목적: 신손상은 보통 복부외상 환자의 10% 정도에서 발생하며 비뇨기계에서 발생하는 손상 중 가장 높은 빈도를 차지하고 있다. 신손상 치료의 궁극적인 목표가 환자의 생명을 구하는 것이고, 가능 하면 신조직을 최대한 보존하면서도 합병증은 최소화하여야 하므로 정확하게 평가된 진단을 내려, 혈류 역학적으로 안정된 경우 보존적 요법을 시행하는 빈도는 증가하고 있다. 본 연구에서는 10년간의 신손 상을 분석하여 손상의 원인, 정도, 치료 방법 등을 알아보고자 하였다. 대상및방법: 2000년 2월부터 2010년 6월까지 본원 응급실에 방문하여 신손상으로 진단된 59명의 환 자들을 후향적으로 분석하였다. 결과: 환자의 성별은 남자가 39례 (66.1%)였고, 여자가 20례 (33.9%)였다. 신손상의 원인은 교통 사고가 37례 (62.7%)였고, 낙상이 7례 (11.9%), 외상이 12례 (20.3%), 자상이 1례 (1.7%), 원 인미상이 2례 (3.4% )였다. 손상의 정도는 I 등급이 11례 (18.6%), II 등급이 10례 (16.9%), III 등급이 20례 (33.9%), IV 등급이 10례 (16.9%), V 등급이 8례 (13.6%)였다. 신손상 환자의 치료 는 대증치료가 46례 (77.9%)였고, 신절제술이 5례 (8.5%), 신혈관색전술이 5례 (8,5%), 그외 다른 치료들이 3례 (5.1%)였다. 결론: 신손상의 원인은 교통사고와 외상 등이 가장 많은 비중을 차지했으며, 3 등급의 손상이 가장 많 았고, 치료는 대증요법이 주를 이루었지만, 점차 신혈관색전술이 늘어나고 있다. 앞으로 지역단위로의 추가적인 연구가 필요할 것으로 생각된다.
윤규택,이동주,최만용,박해원,박정학 한국공작기계학회 2002 한국공작기계학회 춘계학술대회논문집 Vol.2002 No.-
An automobile hub is composed of a hollow cylindrical part with inner and outer diameters. These hub diameters must be precise, as any irregularities in them (diameters) can influence/degrade the motion of an automobile with this problem. Highly accurate and reliable hub inner and outer diameters measurement systems are therefore required for inspection of the diameters. In this research, an automobile hub inner and outer diameters measurement system has been developed and tested. The system consists of measuring heads with LVDT sensors, and associated software for automatic measurement and calibration of the diameters and the sensors respectively. The system has been evaluated in comparison with an existing measurement system, and the following outcomes have been achieved; ·Improved and guaranteed quality and reliability ·Increased productivity and cost reduction These results prove the system developed in this research to be suitable for automobile hub inspection.
윤해동,황원택,김재수 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1
With rapidly industrial development, a railway has become of a main traffic means. But, the railway noise has caused much annoyance for the residents living nearby railway tracks. The result has been indiscreet installation of soundproof walls. But, even after soundproof walls were installed, the residents in the area would complain about the railway noise. In this study. The characteristics of Propagation and Attenuation of railway noise were compared among regions where the Honam Line travels. For this focus, the characteristics of sound field distribution of the soundproof walls in the area were investigated, and the results were supposed to serve as a basic data for effective and rational noise prevention measures.
양원호,이동원,김홍석,박윤범,현명택 제주대학교 공과대학 첨단기술연구소 2005 尖端技術硏究所論文集 Vol.16 No.2
Emulsified fuel (mixed fuels with a small quantity of water) is suggested as a way of simultaneously diminishing NO_(x) and particulate matter. It is, therefore, an eco-friendly fuel and economical energy source. In this research, a comparative analysis between diesel fuel and emulsified fuel on their characteristics and the performance was done.
정원우,이윤종,기우항,김영호,양승영,강용희,안병호,임성규,윤일희,김중욱,윤성효,강동진 경북대학교 과학교육연구소 1997 科學敎育硏究誌 Vol.21 No.-
The purpose of this study is to investigate the status of the experimental and practical education in high school earth. The present status and reasonable management of the experimental and practical education in high school earth science have been grasped from the questionaires. To do this, eighty eight earth science teachers in Korea are administered questionaires. The frequency of the experimental and practical items in the seven kind of earth science text books were investigated. The problems and the reasonable management for experimental and practical education were proposed in this paper.
이동원,김경아,임 영,윤임중 大韓産業醫學會 1996 대한직업환경의학회지 Vol.8 No.3
Asbestosis is chronic inflammatory disorder of lower respiratory tract in which alveolar wall are progressively thickened by a fibrotic process. Fibrotic process characterized by an expansion of fibroblast and collagenous extracellular matrix secreted from this fibroblast. Alveolar macrophage is believed to be a primary target cell and major participant in the evolution of lung fibrosis after asbestos inhalation. Alveolar macrophage are known to release a variety of substance that induce tissue damage and stimulate inflammatory cells and fibroblast. Macrophage also release a variety of metabolite of arachidonic acid. Of these, PGE₂is known to suppress fibroblast proliferation. Asbestos may be a very effective stimulus for fibroblasts without triggering the release of PGE₂. To assess the fibrogenic properties of asbestos according to kind and dosage of asbestos and the ability of PGE₂to suppress the proliferation of fibroblast, alveolar macrophages cultured with crocidolite, amosite and chrysotile in presence or absence of PGE₂10-5M. At 24 hours after alveolar macrophage cultured with various stimuli, the released fibronectin and TNF-α was measured. Viability of alveolar macrophages was observed and growth promoting activity of macrophage supernatant to fibroblasts was quantified. The results were as follows; 1. The viability of alveolar macrophages stimulated with asbestos fiber was markedly decreased compared with control group except chrysotile 10 μg group. Crocidolite and amosite were more cytotoxic than chrysotile. 2. All of asbestos augmented fibronectin production in concentration dependent fashion. 3. There was a significant positive correlation between TNF-α production in supernatant and fiber concentration. 4. Supernatant from alveolar macrophages cultured with asbestos were inducible a significant increase in fibroblast proliferation. 5. Incubation of alveolar macrophages with asbestos in the presence of PGE₂resulted in significant decrease of TNF-α production in supernant. 6. Supernatant from alveolar macrophages cultured with asbestos were inducible a significant decrease in fibroblast proliferation when PGE₂was added. The result of this study strongly suggested that crocidolite and amosite were more cytotoxic and fibrogenic and exogenous PGE₂suppressed fibroblast proliferation following exposed to asbestos.
신규개발된 제초제 metamifop 현탁농축액제에 대한 급성독성평가
이동연,이상훈,백경진,김태원,정두순,임종환,김명석,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-
Metamifop, (R)-2-[4-[(6-chloro-2-benzoxazolyloxyphenoxy]-N-(2-fluorophenyl)-N-methyl propanamide, was newly developed by Dongbu Hannong Chemicals in Korea. In the present study we conducted acute oral toxicity and acute dermal toxicity test. The values of LD_(50) of metamifop was found to be over 5,000 mg/kg for ICR mice. On the other hand, metamifop showed no acute dermal toxicity to SD rats.
정원경,김동호,이주형,임홍범,윤경구 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.A
Reinforced concrete(R/C) is commonly used to structures because they have many merits that compressive strength, economy and so on. However, reinforced concrete has a crack at the tensile section which is due to the relatively lower tensile strength than its compressive strength. Latex modified concrete(LMC) has higher tensile and flexural strength than the ordinary portland cement, due to the interconnections of hydrated cement and aggregates by a film of latex particles. The purpose of this study was to investigate the flexural behavior of reinforced concrete beam with latex modified concrete, having the main experimental variables such as concrete types(ordinary portland cement concrete, latex modified concrete), latex contents(0%, 15%), flexural steel ratios(0.012, 0.0235), and with/without shear reinforcement. The beam of LMC showed considerably higher initial cracking loads and ductility than that of OPC, but, similar to ultimate strength and deflection. This might be attributed to the interlocking of hydrated cement and aggregates by a film of latex particles, water retention due to hydrophobic, and colloidal properties of the latexes resulting in reduced water evaporation. The beam with latex modified concrete could be adopted at field for controlling and reducing the tensile crack due to its higher tensile strength.