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황재석,김원현,서정희 嶺南大學校 工業技術硏究所 1998 工業技術硏究所論文集 Vol.26 No.1
There are many experimental devices for pure shear test such as off-axis tension test pure shear test for Iosipescu conceptions. Arcan circular disk for Arcan conceptions and the general pure shear test and Hawong Iosipescu shear test(H.I.S.T.) etc.. Hawong Iosipescu shear test(H.I.S.T.) device is analyzed through caustics. It is assured that H.I.S.T. device is more effective than Iosipescu shear test(I.S.T.) device for the measurement of stress intensity factor from causic. It is known that H.I.S.T. device without notch is most effective as pure shear test device, between H.I.S.T. device and I.S.T. device for caustics, but H.I.S.T .device and I.S.T. devices are can be used ad pure shear test device
안기원,박정선,서순팔,문재동,조진형 大韓産業醫學會 1998 대한직업환경의학회지 Vol.10 No.1
In order to evaluate the genotoxic hazard among workers potentially exposed to low level petrochemical substances, the analyses of micronuclei(MN) and sister chromatid exchanges(SCEs) in lymphocytes were performed in 46 male workers(as exposed group) and 46 nonexposed subjects(as control group). Mean frequencies of MN and SCEs(respectively, 12.9/1000 cells and 6.5/cell) in exposed group were very significantly higher than those(10.2/1000 cells and 5.4/cell) in control group. And there were also significant differences in mean frequencies of MN and SCEs adjusted for age, employment duration, smoking, and drinking between two groups. Median frequencies of MN and SCEs in exposed group were very significantly higher than those in control group. Frequencies of SCEs were higher in smokers than in non-smoker. Frequencies of MN in smokers, however, were similiar to those of non-smoker. Interaction between exposure and smoking on MN and SCEs induction was not observed. The results suggest that there is genotoxic hazard in high risk group like workers handling carcinogens in petrochemical plants and the analyses of MN and SCEs are useful biomarkers for the exposure to hazard substances even at the level below the exposure limit.
宅地開發事業에 있어서 計劃的 都市構成 要素와 事業施行後 나타나는 構成과의 差異點에 關한 硏究
권준오,김재원,정명희,이도범 조선대학교 국토개발연구소 1997 국토개발연구 Vol.17 No.1
The writer has studied the differences between the original plan and real problems occurred in the working process of developing housing lots around Bijun District and Jungui District carried by KLDC according to the housing site development special law. And I has analyzed the reasons, and suggest methods for improvement; First, in the point of creating cities : In calculating planned population, various conditions of the city should be totally reviewed; population utilizing the facilities should be considered in the light of prospect of future development; in location planning of facilities, bus service route, present state of utilizing the neighbored lands and planning should be considered. Second, in the point of utilizing land : To make up the esale right for the buildings which are against land categories; to make different division of lots according to the width of neighbored loads and its distance from central facilities, and it will lead to the change of using land. Third in the point of traffic : To reflect bus service route in establishing street plann and land use plan : to make sure of street network and to control direct connection between main route and readjusted route.
Asphalt로 피복된 Portland Cement를 使用한 Concrete의 諸性質
尹錫天,李昌甲,洪元杓,鄭秀永,南宰鉉 충남대학교 공업교육연구소 1982 論文集 Vol.5 No.1
The construction works with concrete has the potential problems of water tightness. The conventional treatments for water-tight concrete are not satisfactory in terms of strength and water tightness. This study was to investigate the effects and application of the asphalt-coated portland cement on water-proof of the concrete and its influences on the physical properties of the concrete. The asphalt-coated portland cement, which is hereafter referred to as ACPC, was made by coating ordinary portland cement with asphalt in the rate of weight ranging from 0.5 to 1.0 percent. In this process, Calcium Chloride and Sodium Silicate were tried as the hardening time accelerator for producing ACPC, and carbon black, talc and other materials were tested for their effectiveness as pore filler. The specimens were prepared and tested with the various amounts of additives as a variable factor to find the optimum material. The analysis was mainly focused at water tightness, physical properties of the concrete and working conditions. The major findings of this experiment are as follows ; 1) Water-proof Test ① The specimens of ACPC and ordinary portland cement(OPC) were tested under the pressures of 3 and 9 kilograms per square centimeter per 24hours respectively and compared. The OPC specimens showed considerable amount of leakaged water while the ACPC specimens were rated lower permeabilities of 89%/28days, 40%/56days and21%/84days under the abovementioned pressure conditions. The most successful composition for water-proof was identified as ACPC added with Calcium Chloride and carbon black. ② The ACPC demonstrated its superiority in absorption test. The absorption amount of OPC for l hour was greater than that of ACPC for 24hours. 2) Compressive Strength Test Four kinds of specimens of ACPC aging 7, 28, 56 and 84days were tested and compared for their respective results of OPC. The ACPC added with carbon black was lower than OPC in compressive strength in the case of curing ages of 7 and 28days but ACPC was superior to the OPC in the specimens aging 56 and 84days. The ACPC added with others except carbon black exposed their lower compressive strength in all circumstances compared with the OPC specimens. 3) Slump Test The slump of ACPC with various additives such as carbon black, talc or clay was 21.6 centimeter which was higher than the OPC of 18.4centimeter slump. This result concluded that ACPC was much favorable in workability in comparison with that of the OPC. The conclusions are summarized as follows; 1) The optimum mixture for water tightness and compressive strength of concrete was found at 0.5% of SACPC, Calcium Chloride and carbon black respectively at the rate of the weight of cement.
( Won Jai Jung ),( Byung Hoon Park ),( Kyung Soo Chung ),( Song Yee Kim ),( Eun Young Kim ),( Ji Ye Jung ),( Young Ae Kang ),( Young Sam Kim ),( Se Kyu Kim ),( Joon Chang ),( Moo Suk Park ) 대한결핵 및 호흡기학회 2013 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.116 No.-
Background: Plasma glucagon in sepsis has scarcely studied. We tried to identify whether glucagon levels were associated with disease severity and mortality in patients with severe sepsis or septic shock. Methods: We evaluated patients with severe sepsis or septic shock admitted to ICU of the university-affiliated hospital in Korea. Plasma levels of glucagon were measured in a total 112 patients (57 survivors and 55 non-survivors) with severe sepsis or septic shock. Results: Compared with the survivors, patients who died in 28 days had significantly higher levels of glucagon on day 0 (admission day), 1, 3, and 7. Glucagon levels were correlated with severity scores (SOFA and APACHE-II). Multivariate analysis identified glucagon levels, presence of septic shock as independent predictors of the overall 28-day mortality rate. Receiver operating characteristic analysis showed that the area under curve of glucagon levels to predict 28-day survival was 0.63 (95% CI=0.52-0.73; P=0.021) as similar as APACHE II. Conclusions: Glucagon levels are related to poor prognosis in patients with severe sepsis.Background: Plasma glucagon in sepsis has scarcely studied. We tried to identify whether glucagon levels were associated with disease severity and mortality in patients with severe sepsis or septic shock. Methods: We evaluated patients with severe sepsis or septic shock admitted to ICU of the university-affiliated hospital in Korea. Plasma levels of glucagon were measured in a total 112 patients (57 survivors and 55 non-survivors) with severe sepsis or septic shock. Results: Compared with the survivors, patients who died in 28 days had significantly higher levels of glucagon on day 0 (admission day), 1, 3, and 7. Glucagon levels were correlated with severity scores (SOFA and APACHE-II). Multivariate analysis identified glucagon levels, presence of septic shock as independent predictors of the overall 28-day mortality rate. Receiver operating characteristic analysis showed that the area under curve of glucagon levels to predict 28-day survival was 0.63 (95% CI=0.52-0.73; P=0.021) as similar as APACHE II. Conclusions: Glucagon levels are related to poor prognosis in patients with severe sepsis.Background: Plasma glucagon in sepsis has scarcely studied. We tried to identify whether glucagon levels were associated with disease severity and mortality in patients with severe sepsis or septic shock. Methods: We evaluated patients with severe sepsis or septic shock admitted to ICU of the university-affiliated hospital in Korea. Plasma levels of glucagon were measured in a total 112 patients (57 survivors and 55 non-survivors) with severe sepsis or septic shock. Results: Compared with the survivors, patients who died in 28 days had significantly higher levels of glucagon on day 0 (admission day), 1, 3, and 7. Glucagon levels were correlated with severity scores (SOFA and APACHE-II). Multivariate analysis identified glucagon levels, presence of septic shock as independent predictors of the overall 28-day mortality rate. Receiver operating characteristic analysis showed that the area under curve of glucagon levels to predict 28-day survival was 0.63 (95% CI=0.52-0.73; P=0.021) as similar as APACHE II. Conclusions: Glucagon levels are related to poor prognosis in patients with severe sepsis.
The expression of TLRs in pulmonary neuron in bleomycin induced pulmonary fibrosis model
( Won Jai Jung ),( Sue In Choi ),( Eun Joo Lee ),( Kyung Hoon Min ),( Gyu Young Hur ),( Seung Heon Lee ),( Sung Yong Lee ),( Je Hyeong Kim ),( Chol Shin ),( Jae Jeong Shim ),( Kwang Ho In ),( Kyung Ho 대한결핵 및 호흡기학회 2015 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.120 No.-
Background: The family of Toll-like receptors (TLRs) plays a key role in controlling innate immune responses to a wide variety of pathogen-associated molecules. Nerve cells originated from lung are considered to be related with clinical respiratory symptoms including coughing, dyspnea. However, investigation of TLRs in pulmonary nerve cells has scarcely studied. We investigated the expression of TLRs in pulmonary nerve cells and change of TLRs in bleomycin induced lung fibrosis model. Methods: Male Spraque-Dawley rats were given a single dose of bleomycin (2.5 mg/kg, intratracheally) in pulmonary fibrosis groups and saline in controls. Fibrotic changes in lung were estimated to occur by BAL, histology and SIRCOL collagen assay. Using real-time PCR, we assessed the expression of TLRs (TLR 1-9) in pulmonary neurons of bleomycin induced lung fibrosis rat model in comparson with normal controls. Results: Bleomycin challenge caused pulmonary fibrosis with increase in collagen content of lung tissue and typical histological findings. We showed strong expression of TLR-2, TLR-5 in pulmonary neuron of bleomycin fibrosis rats versus normal rats. Conclusions: The concerted alteration of expression of TLRs in pulmonary neurons can be of relevance for understanding the pathogenesis of lung fibrosis.