Fusulinids and Depositional Conditions of the Marine Sediment (Carboniferous) of the Yong-weol Coalfield, Korea

鄭昌熙(Chang Hi Cheong),朴龍安(Yong Ahn Park) 대한지질학회 1977 지질학회지 Vol.13 No.3

한국기업의 환경성과와 경영성과 관계에 관한 연구

조희영,진용 동국대학교 경영대학원 2000 經營論叢-東國大學校 經營大學院 Vol.24 No.-

In an academy circle, after the research on the relationship between environmental performance and business performance conducted by Bragdon & Marlin in 1970, many researchers have been conducting the similar researches, and the results of them showed diversities of the positive relation, negative relation, no relation. The purpose of this paper lies on not only developing the structural model which can explain systematically the path of the impact relationship between environmental performance and business performance, but also analyzing the model empirically focusing on the Korean factories received 'Environmentally Friendly Factory' award given by Korean Ministry of Environment. In order to develop the relational model between environmental performance and business performance, the previous studies have been reviewed. The scope of the environmental performance can be classified into 3 categories such as pertaining production activities, environmental status, and management area, but the method used in ISO has been adopted in this paper. In the previous study, they adopted the various control variables like, the size of the firm, the characteristics of industry a firm belongs to, the risk level of firm, market share, firm's leverage, diversity of foreign market. The control variables are extracted in this paper, after reviewing the status of Korean firms through interviewing 26 environmental managers of the large companies and 8 experts of the field of environmental management. They are the 3 factors involving the characteristics of the product and industry, market, and structures of firm. This paper suggested the classification of the firm whether it belongs to the clean industry or polluted industry as for the factor of product and industry, and to what degree the firm is oriented toward foreign developing country as for the factor of the market, and production cost proportion (relative proportion to the industrial average for material, labor, overhead) and debt ratio as for the factor of the structure of a firm. This paper developed the model showing how the environmental performance is linked to the business performance applying the above factors as the control variables. The implication of this model is that the impact of the environmental performance to business performance can be different from the magnitude of the control variables stated above, and the path of the impact can go over to the two direction. One is to increase the revenue by differentiation of the products and the firm through enhancing the customer's perception for the environmentally friendliness. The other path is to reduce the costs by leading the beyond compliance regarding the environmental regulation. This paper also conducted the empirical analysis to test appropriateness of the control variables suggested in the model. The measurement of the environmental performance and business performance adopted in this test is based on the corporate real data. For the measurement of the environmental performance, emission data of the firms such as the percentage change of discharge quantity of the dust, the waste water, the solid wastes of 62 factories which were nominated as a 'Environmentally Friendly Factory' from the Korean government is applied. For the measurement of the business performance, the percentage change of the revenue is adopted.The data of the both measurement of environmental performance and business performance are collected from the period 1994 to 1998 for 5 years. This paper found that proportional increase of the wasted water effluent as a index for the environmental performance can affect the business performance depending upon the firm's conditions such as 'clean industry', 'relative proportion of export', 'relative proportion of debt ratio', 'relative proportion of the cost of material in manufacturing costs', 'relative proportion of the overhead cost in manufacturing costs'. So, we can accept the all the hypothesis which are set in this paper. And also, this result of the empirical test can provide the feasibility of the theoretical model which is presented in this paper, in the sense that environmental performance can affect the business performance through the control variables.

하수처리장 방류수의 여과특성에 관한 연구

이용두,고인범,김현희 제주대학교 해양연구소 1997 해양자원연구소연구보고 Vol.21 No.-

This study was performed to investigated the removal efficiency of BOD and SS from the retreated water of sewage effluent by upflow filtration system. Flow rate of sewage effluent were 80m/day. 150m/day. 200m/day and 300m/day. The removal rate of SS was above 90%. and independent on the flow rate. However. BOD removal rate decreased with the flow rate increase. And removal rate of BOD was 40-60%. In the results of experiment, it was considered that the treated water was possible to use as the graywater because it was suitable to Flush Toilet, Springkle -Water. Cleaning Car. etc.

컴퓨터 시뮬레이션을 이용한 신 생물학적 고도처리(병렬 고도처리) 공법 개발

이병희,이용운 대한상하수도학회 2002 상하수도학회지 Vol.16 No.6

Since Korean government imposed a stricter regulation on effluent T-N and T-P concentrations from wastewater treatment plant, a new process has to be developed to meet these rules and this process should remove T-N and T-P, economically, from weak wastewater that is typical for Korea's combined sewer system sewage. In this study, a computer simulator, BioWin from EnviroSim, Inc. was used. Three processes - A2/O, Modified Johannesburg, UCT- had been simulated under same operational conditions and a new process - Parallel BNR Process - had been developed based on these simulation results. The Parallel BNR process consists of two rows of reactors: One row has anaerobic and aerobic reactors in series, and the other row has RAS anoxic1 and RAS anoxic2 reactors in series. In order to ensure anaerobic state in anaerobic tank, a part of influent is fed to RAS anoxic1 tank in second row. This process had been simulated under same conditions of other three processes and the simulation results were compared. The results showed that three existing processes could not perform biological phosphorus removal when the average influent was fed at any operation temperatures. However, the Parallel BNR process was found that biological phosphorus removal could be performed when both design and average influent were fed at any operation temperatures. This process showed the T-N concentration in effluent had a maximum value of 15mg/L when design influent was fed at 13℃ and a minimum value of 14mg/L when average influent was fed at 20℃. Also, T-P concentrations had a maximum value of 1.3mg/L when average influent was fed at 20℃ and a minimum value of 1.1mg/L when design influent was fed at 13℃. Based on these results, we found that this process can remove nitrogen and phosphorus biologically under any operational conditions.

Monoclonal Antibody를 이용한 Streptococcus mutans 검출 방법의 임상적 적용에 관한 연구

홍희정,김종수,김용기 大韓小兒齒科學會 2009 大韓小兒齒科學會誌 Vol.36 No.4

Monoclonal antibody를 이용한 Saliva-check Mutans키트의 타액 Streptococcus mutans검출방법으로서의 활용도와 임상적 우식지수 및 기존의 세균배양방법과의 상관관계를 알아보기 위해 2008년 2월에서 5월 중 평촌키즈웰치과에 내원한 만 2세에서 만 8세 사이의 92명의 아동을 대상으로 Streptococcus mutans 검출검사를 실시하였으며 또한 우식에 영향을 미치는 다른 요인인 치면세균막 pH와 타액완충능력검사를 실시하여 다음과 같은 결론을 얻었다. 1. Saliva-check Mutans 검사결과 양성을 나타낸 아동은 27명으로 29.3%이었고, 음성을 나타낸 아동은 65명으로 70.65%이었다. 우식경험유치면률은 음성 아동 13.89%, 양성 아동 25.23%으로 나타났다. 2. Monoclonal antibody를 이용한 검사방법 인 Saliva- Mutans와 기존의 세균 배양방법인 -SM은 각각 상이한 검사방법을 이용함에도 불구하고 검사결과 높은 상관관계를 보였다(p<0.01). 3. Saliva-check Mutans검사와 치면세균막 pH검사와는 역상관관계를 나타내었으나(p<0.01),타액완충능 검사와는 상관관계가 나타나지 않았다(p>0.05). 이상의 결과로 보았을 때 Monoclonal antibody를 이용한 검사방법인 Saliva-check Mutans는 구강 내 Streptococcus mutans를 측정하는 방법으로 적당하며 또한 검사에 필요한 시간을 대폭 줄일 수 있고 사용방법도 매우 간편하게 개발되어 환자들에게 적용함에 있어 효과적이라고 사료되었다. The purpose of this study was to evaluate the clinical effectiveness of new streptococcus detection system which used monoclonal antibody against Streptococcus mutans. 92 children aged between 2 and 8 were involved in this experiment and their saliva samples were collected for testing. Streptococcus mutans were measured by both monoclonal antibody-based detecting system (Saliva-check Mutans) and dip slide detecting system(Dentocult-SM). The results showed that Saliva-check Mutans levels had a significant correlation with dfs rate of subjects and the two test kits, Saliva-check Mutans and Dentocult-SM were shown to have a good correlation although they were based on different mechanism.

감마선 분광분석법에 의한 환경방사선 연구

윤주용,전재식,오희필 충남대학교 자연과학연구소 1984 忠南科學硏究誌 Vol.11 No.1

For the purpose of practical assessment of resional environmental radiation characteristics, a series of in-situ spectromentry was carried out using a 3″ø×3″cylindrical NaI(T1) scintillation detector in association with a MCA at eight different points in open field of Daejeon area. In determining the exposure rate from the spectra obtained, the methods developed by Beck et al. was used. The exposure rate evaluated in this way was compared with those observed by the Moriuchi's spectrum-exposure rate conversion operator, and Reuter/Stokes environmental radiation monitor. The three results were in good agreement within statistical uncertainty. Although the exposure rate in this area varied with place, the spectra measured are quite similar in pattern. It was shown that the major part of the terrestrial radiation in the area consists of the gamma-rays emitted from the daughter products of ^238U and ^232Th series and then from ^40K.

18世紀 農村의 社會構造 : 慶尙道 丹城縣의 경우

金錫禧,朴容淑 부산대사학회 1979 역사와 세계 Vol.- No.3

생명보험회사 설계사의 정착을 위한 관리체계 개선방안에 관한 실증적 연구

徐熙烈,장용원 강남대학교 사회과학연구소 2001 사회과학논총 Vol.11 No.-

海雲台砂浜의 漂砂에 관한 硏究

金熙鍾,姜周復,朴雲龍 동아대학교 공과대학 부설 한국자원개발연구소 1982 硏究報告 Vol.6 No.2

It must be a significant problem of national standpoint as well as Busan city that the area of Hae un dae beach continues to diminish since 1976. This problem seems to be caused by the transportion of littoral drifts. Therefore, this paper intended to investigated parameters having best correlationship with the drift and be able to estimate transfer quantity in future, and besides to develop protection method to control the phenomena. 1. A primary factor of Haeun-dae seashore erosion is that the more wave steepness is, the more severe erosion is. When the value of slope is above 0.025 erosion occurs, and relatively accretion occurs when it is below 0.025. And other factor is that is that if constructions place near the shoreline, erosion will be more sever. So in case of landfilling the front of the mouth of Chun river, erosion seems to be more severe because shortage of supply-sand was caused by position deformation of the mouth of river. 2. The range of specific gravities of sands in Heaun-dae beach is 2.56-2.69. At No.23 a great deal of soil was involved, at No.33 clam-shell, sand soil were mixed and dam-shells were mainly included at No.44 3. The materials of sea-bed were sampled at point of 50m, 100m, 300m, 400m, 500m, away from the shoreline of No.23, No33, No.44, No.55, No.65 relatively. As a result of analysis of the specific gravities and median diameters, the specific gravities at both sides decrease according to the depth of water, and in the vicinity of the center a kind of cyclic phenomenon, which the specific gravities having the range of 2.76-2.27 increase and decrease in turns at intervals of 50m, appears. Near the center there are many clam-shell and S O₂, the component of pure sand is only 45.44%, so the specific gravities decrease to 2.27. 4. It seems that entrance and exit of hae un dae sand to Su-yeang, chun river from Song jeang line, recently it is assumed that it go to Hae un dae on the ground of insufficient evidence in diameter, specific gravity. 5. It was known that erosions happen is spring and autumn mainly. 6. Total erosion quantity is 15000m3 and the reduction area of beach sands is 2,230㎡ from July, 1981 to June, 1982 7. The equilibrium slope of beach sand had been step type untill 1982, 3. 17, but it has belonged to bar type since 1982.3, 17. 8. The specific gravities of the materials of sea-bed at the front of Kuk Dong hotel and the 3rd watchtower are about 2.70, Here, sands seems to be transported from land to sea at the latter, from west to south at the former. Chun-river is guessed to be a supply source of sands. But At the front of the 1stwatch tower, the specific gravity of sands is about 2. 57, which is relative light. considering that the specific gravity of sands is 2.573 in su-yeang river. At the front of Beach hotel the specific gravity is the smallest value of 2.54. Here, there are mainly clam-shells, so it is concluded that sands were transported from East-river「in song- Jeung. 9. In protection method of beach erosin, back sea dyke more than 10m(requirement model test) and construct 10m in width low step, is absorbed by it. It is to be desired that beach nourishment per 20,000㎥/year 10. To estimate the wave steepness and erosin quantity the equation, V= -338,727.3(H_0/L_0)+4898.2, was induced. 11. By the equation, V= -338727.3(H_0/L_0)+4898.2 total evosion quantify is 159,042㎥ from July. 79 to June, 82. Because Busan is the city surrounded by sea, it is absolutely necessary to be able to observe the deepwater wave height by means of wave height observation stations.

窒素化合物의 水素化

朴龍泰,李彰熙,卞嶺錫 慶北大學校 物理化學硏究所 1984 硏究論文集 Vol.5 No.-

Catalytic hydrogenation of benzyl cyanide and phenyl cyanide with Pd/c and chloroform as proton source produce effecitively the primary amines, β-phenylethyl amine and benzyl amine respectively. Hydrogn chloride originated from hydrogenolysis of chloroform eliminates the primary amines reduced from nitriles on the catalytic (Pd/c) surface, preventing secondary amine formation. When methylene chloride is used as proton source in the catalytic (Pd/c) hydrogenation of nitriles, secondary amines are produced. With Raney-Ni, catalytic hydrogenation of some nitriles and nitrocompounds with chloroform as proton source do not give the expected reduction products, amines. Since the expected intermediate, nitrosobenzenc and N-phenylhydroxylamine was smoothly reduced to aniline in the catalytic reduction, they might be the intermediates in the catalytic (Ra-Ni) reduction of nitrobenzene. The expected product, water from Ra-Ni catalytic hydrogenation of nitrobenzene was identified by Gas Chromatography.