http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Execution Qualities Under Financial Crisis : 2008 Financial Crisis Case
이관영 한국자료분석학회 2010 Journal of the Korean Data Analysis Society Vol.12 No.2
This study examines the changes in market condition during the financial crisis. Adverse selection cost during the financial crisis forces dealers to widen the effective spreads across the exchanges. I attribute this result to the typical behavior of dealers to protect themselves from losing money to better-informed traders, because widened spreads effectively reduce the risk. However, this behavior is in conflict with the obligation of dealers to provide orderly and liquid market. To compensate for the increase in execution costs, dealers provide liquidity traders with more price improvements in numbers of shares covered, percentage shares, and dollar amount per share. Among dealers, NYSE specialists provide better execution qualities in times of financial crisis, and lose less.
이관영 대구대학교 산업기술연구소 1992 産業技術硏究 Vol.11 No.-
Nowadays water sources of an industrialized and modernized society get more and more deteriorated and so water quality in urban area requires all-weater management.Waste-water treatment which is a typical method of improving water quality wants being expanded not only into big cities but into middle or smal cities. in this study, I tried to exanine the drainage of successive measuring many water qualities (PH, DO, BOD, SS, NH₃-N, PO₄- P)in a slected experimental basin with hydrologic factors. I hope this study will do much for the planning for water quality treatment.
下水處理場의 流入水質이 Sludge負荷量에 미치는 影響
이관영,박상현 대구대학교 과학기술연구소 1998 科學技術硏究 Vol.5 No.4
After analyzing waste water sludge quantities of 3 types of waste water treatment plants operated in Taegu area(Dd, Df and S-treatment plants) on the basis of BOD, COD and SS, we could have the results as follows 1. The average inflow quality in the Df-treatment plants tends to be better 1.8 times than in the Dd-treatment plants and 3.1 times than in S-treatment plants. 2. The inflow characterisics of each season sustain the same tendency in all the types of treatment plants except m Df-treatment plants. On the whole, the inflow characteristics during March through May tends to be worse while they tend to be better during July through September. 3. The concentration loading of inflow in Df-treatment plants is more than in the other two types of plants. According to our survey, the concentration loading of inflow was 34,740(kg·BOD/d) in Df-treatment plants, 21,876(kg·BOD/d) in S-plants. 4. As to the dry sludge quantities with relation to each inflow property, we checked up BOD and SS. The result was that BOD was 0.915kg per lkg of inflow and SS was 0.369kg per lkg of inflow in Df-treatment plants. In case of Dd-treatment plants, BOD was 0.367kg and SS was 0.293kg. BOD was 0.399kg and SS was 0.293kg in S-treatments. 5. When we made a regression analysis of the dry sludge quantities of BOD and SS, we could find the dependability was over 90% in all the plants. So we can see that there is a close relation between inflow quality and sludge quantity.
국내에서 분리된 Aspergillus flavus 균주에 의한 Aflatoxin의 생성
이관영,최언호,이서래,Lee, Kwan-Young,Choi, Eon-Ho,Lee, Su-Rae 생화학분자생물학회 1975 한국생화학회지 Vol.8 No.1
국내의 변질미에서 분리, 동정된 Aspergillus flavus var. columnaris의 aflatoxin 생성능을 확증하기 위하여 본 균주를 인위적으로 접종한 쌀에서 aflatoxin $B_1$을 결정 상태로 순수 분리하였고 thin-layer chromatographic behavior, 융점, 유도체 합성, 자외선 및 적외선 흡수 스펙트럼, 그리고 미생물학적 반응에의 하여 이를 동정하였다. 본 균주에의 한 aflatoxin의 생성 능력은 쌀 1g 당 $7.8\;{\mu}g$으로써 외국에서 aflatoxin을 가장 많이 생성하는 것으로 알려진 표준 균주의 그것에 비하여 1/90 정도에 불과하였다. In order to confirm the producibility of aflatoxin by Aspergillus flavus var. columnaris isolated from deteriorated rice in Korea, aflatoxin $B_1$ was purified in crystalline form from artificially inoculated rice and identified by thin-layer chromatographic behavior, melting point, derivative formation, ultraviolet and infrared absorption spectra, and growth inhibition of Bacillus megaterium. The production level of aflatoxin by the strain was about $7.8\;{\mu}g$ per g of rice, being about 1/90 of that by A. flavus group known to produce the most aflatoxin in the world.
이관영 대구대학교 산업기술연구소 1985 産業技術硏究 Vol.4 No.-
It is very important that in the water resources control the runoff characteristics of the river are understood evidently. And flood forecasting by studies of the runoff characteristics in rainfall is very meaningful, but it is also very important that we pre-estimate discharge with the recession characteristics during long term rainless period. In this paper, the exponential function recession formula and the fractional function recession formula; that are representative method, are compared with, and which of them is more precise, is analyzed.
燒却施設의 效率的인 運營方案에 關한 硏究 : 大邱市를 中心으로
이관영,박상현,김영섭 대구대학교 과학기술연구소 1996 科學技術硏究 Vol.3 No.2
Nowadays several nations have revealed that incineration plants were producing a large volume of hazardous waste, including Taegu city in Korea, which threatens our environment and our health. So the author has completely worked out literature review relating to incineration plants producing air pollution in the world. Therefore, this paper suggested to effective incinerator's operations to improve environmental aspects and assure that they are both safe and effective.