Pettis 적분 가능한 함수의 특성에 관한 연구

임동일 한국수학교육학회 1989 수학교육 Vol.28 No.2

피복정리(被覆定理)의 증명에 대하여

임동일 한국수학교육학회 1978 수학교육 Vol.17 No.1

한국과 중국의 강 퇴적물의 주성분 원소 함량 특성: 황해 니질 퇴적물의 기원지 연구를 위한 잠재적 추적자

임동일,신인현,정회수 한국지구과학회 2007 한국지구과학회지 Vol.28 No.3

The Yelow and East China seas received a vast amount of sediment (>109ton/yr), which comes mainly fromthe Changjiang and Huanghe rivers of China and the Korean rivers. However, there are still no direct sedimentological-geochemical indicators, which can distinguish these two end-members (Korean and Chinese river sources) in these seas.within the sediment load of the Yellow and East China seas. The compositions of major elements (Al, Fe, Mg, K, Ca,Na, and Ti) of Chinese and Korean river sediments were analyzed. To minimize the grain-size effect, furthermore, bulksediments were separated into two groups, silt (60-20m) and clay (<20m) fractions, and samples of each fraction wereanalyzed for major and strontium isotope (87Sr/86Sr) compositions. In this study, Fe/Al and Mg/Al ratios in bulk sedimentsamples, using a new Al-normalization procedure, are suggested as an excellent tool for distinguishing the source ofsilt and clay fraction samples. In silt fraction samples, Korean river sediments have much higher 87Sr/86Sr ratio(0.7229~0.7253) than Chinese river sediments (0.7169~0.7189), which suggeststhe distribution pattern of 87Sr/86Sr ratios asa new tracer to discriminate the provenance of shelf sediments in the Yelow and East China seas. On the basis of thesegeochemical tracers, clay fractions of southeastern Yellow Sea mud (SEYSM) patch may be a mixture of two sedimentsoriginated fromKorea and China. In contrast, the geochemical compositions of silt fractions are very close to that ofKorea river sediments, which indicatesthat the silty sediments of SEYSM are mainly originated from Korean rivers.......... Geochemical tracers, Korean and Chinese river sediments, Yellow and East China seas. . : ... ....... ... ... ... ... ... ..... .. .. ..... .... ..

생생(生生) 도시를 통해 본 녹색도시의 도시계획적 특성

임동일 한국지역발전학회 2011 지역발전연구 Vol.10 No.2

본 연구는 우리나라의 저탄소 녹색성장 도시모델로서 제시하고자 녹색성장위원회에서 공모 시행 중인 생생(生生)도시에 대한 도시계획적 특성의 파악을 목적으로 하였다. 연구의 진행과정은 저탄소 녹색도시에 대한 이론적 개념과 우리나라의 녹색도시 관련 제도를 검토하여 분석적 틀을 구축하고 생생도시의 평가기준과 선정된 도시들의 주요 사업내용을 비교?분석하였다. 본 연구를 통하여 생생도시가 녹색도시의 모델로서 제시되기에는 도시계획 측면에서 한계가 있음을 제시했다.이는 생생도시가‘저탄소 녹색성장 기본법’에 근거한 녹색성장 방향을 근거로 평가기준이 작성되었고, 이로 인하여 도시계획의 일부 분야만이 평가범위에 포함되었기 때문이다. 따라서 생생도시 공모제도에서 본래 추구했던 녹색성장 도시모델을 제시하기 위해서는 도시계획 전 부문을 포괄하는 평가지표로 전환되어야 한다. 그러나 이처럼 평가범위가 확충되기 위해서는 녹색도시 조성을 위한 도시계획 수립지침이 구체화되어야 한다. 이를 위해서는 녹색도시 조성을 계획지침과 기준에 대한 논의와 연구가 우선적으로 진행되어야 할 것으로 사료된다.

On uniform convergence theorems for the interior integral

임동일,Yung-Jinn Kim 충청수학회 2006 충청수학회지 Vol.19 No.4

In this paper, we introduce interior integral and prove uniform convergence theorems for the interior integral.

활성화된 질산화균 주입에 의한 저온 질산화효율 향상

임동일,김영희 한국도시환경학회 2018 한국도시환경학회지 Vol.18 No.4

In this study, we have developed a lab scale bioreactor to identify the characteristics of nitrification reaction according to operation condition (temperature, inhibitor (as Cl), activated nitrifying bacteria (ANB). etc) to improve nitrification efficiency at low temperature. Recovery rate of nitrification took about 4 days to reach the normal level by injected ANB after inhibition shock of CI injection at 20oC, when measured the concentration of NO2−-N+NO3−-N in the effluent. In the case of 10oC, recovery of nitrification rate took about 4 days to reach the level of half to the normal level and 7 days for complete recovery which took 3 days more than those at 20oC. At 10oC considering the winter season, the specific nitrification rate(SNR) of the from 1 day to 6 days after injected ANB according to its operation condition increased from 0.029 to 0.767 mgN/gSS/hr. The simulated SNR for the 8th day after the injected ANB at 10oC was 0.840, 3.625 mgN/gSS/hr, respectively as linear function and exponential function, expecting to exceed level of 2.592 mgN/gSS/hr at normal condition. It was confirmed that injection of ANB during low temperature operation has many effects for improving nitrification efficiency through this study. In future studies, if further studies are carried out the determination of ANB injection and the design of efficient ANB reactor considering the changes of operating characteristics by site, it will contribute to the improvement of nitrification efficiency in winter season. 본 연구에서는 Lab 규모의 생물반응장치를 제작하여 운전조건 변화(온도, 저해물질(Cl), 활성화된 질산화균 투입 등)가 질산화에 미치는 영향을 파악하여 저온 조건에서 질산화효율을 향상시킬 수 있는 방안을 찾고자 하였다. NO2−-N+NO3−-N 농도 실험에서 20oC의 경우 염소를 투입하여 질산화균을 사멸한 후 활성화된 질산화균을 투입하면, 정상수준까지 회복하는 데약 4일 정도 소요되었다. 10oC의 경우, 활성화된 질산화균을 투입하여 이전 상태로 회복 되는 데는 약 7일 정도 소요되어 20oC에 비하여 약 3일이 더 소요되었다. 비질산화속도 실험에서는 10oC 운전조건에서 활성화된 질산화균 투입 후 1일경과시 비질산화속도는 0029 mgN/gSS/hr에서 6일 경과시 0.767 mgN/gSS/hr까지 증가하였다. 선형 모형식과 지수함수 모형식에 의한8일 경과후의 비질산화속도는 각각 0.840, 3.625 mgN/gSS/hr로 예측되어 정상수준인 2.592 mgN/gSS/hr을 상회하는 것으로예상되었다. 본 연구를 통하여 저온 운전시 활성화된 질산화균을 주입하면 질산화효율을 향상시키는데 많은 효과가 있음을확인하였다. 향후 연구에서 현장별 운전특성을 고려한 ANB 투입량의 결정, 효율적인 ANB reactor의 설계 등에 대한 추가적인 연구가 진행된다면 동절기 질산화효율 향상에 많은 기여를 할 수 있을 것이다.

감성지능이 직무만족을 매개로 이직의도에 미치는 영향: 신입사원을 대상으로

임동일,한상훈 사단법인 인문사회과학기술융합학회 2016 예술인문사회융합멀티미디어논문지 Vol.6 No.11

The purpose of this study was to explore influence of emotional intelligence and job satisfaction on turnover intention and to verify the relationship between variables, using surveyed data collected from samples of 105 new male and female employees. Data were analyzed through frequencies, correlation analysis, factor analysis and human reliability analysis by using SPSS version 22.0 program, and simple regression and multiple regression were conducted to verify influence and mediated effect between variables. Results were as follows: First, emotional intelligence of new employees was positively correlated with job satisfaction, but negatively correlated with turnover intention. Second, there was the mediating effect of job satisfaction on the relationship between new employee’s emotional intelligence and turnover intention. Accordingly, the study found that new employee’s emotional intelligence was directly affected to turnover intention, and indirectly affected through job satisfaction. This study focused on person’s internal emotions such as emotional intelligence and job satisfaction unlike prior research focusing on external environments such as human relations, job and system, thereby providing objective research to find the way of lower turnover intention. 본 연구는 신입사원의 감성지능과 직무만족이 이직의도에 미치는 영향력을 밝히고 변수 간 관계를 검증하기 위해 기업에 종사하는 남·여 신입사원 105명을 대상으로 설문조사한 내용을 분석하였다. 자료의 처리는 SPSS 22.0 프로그램을 사용하여 빈도분석, 상관분석, 요인분석, 신뢰도 분석을 실시하였고, 변수 간 영향력과 매개효과를 검증하기 위해 단순회귀분석, 중다회귀분석을 실시하였다. 본 연구를 통한 주요결과는 다음과 같다. 첫째, 신입사원의 감성지능은 직무만족에 정적인 관계의 영향력을 미치고 있었으며, 신입사원의 감성지능과 직무만족은 이직의도에 부적인 영향력을 미치고 있었다. 둘째, 신입사원의 감성지능과 이직의도와의 관계에서 직무만족은 매개효과가 있는 것으로 나타났다. 따라서 신입사원의 감성지능은 이직의도에 직접적으로 영향력을 미치고, 직무만족을 통해 간접적으로 영향을 미치는 것으로 밝혀졌다. 본 연구는 신입사원의 이직의도에 영향을 미치는 요인들을 인간관계, 직무, 제도 등 외부 환경적 요인에 초점을 맞추었던 이전의 선행연구들과는 달리 감성지능, 만족과 같은 개인의 내부 심리적 요인에 초점을 둠으로써 보다 다양한 차원에서 신입사원의 이직의도를 낮출 수 있는 방안을 강구할 수 있도록 실증적 자료를 제공하였다.

Geochemical Compositions of Coastal Sediments around Jeju Island, South Sea of Korea: Potential Provenance of Sediment

임동일,Lim, Dong-Il The Korean Earth Science Society 2003 한국지구과학회지 Vol.24 No.4

Surficial sediments from the northern coastal area of Jeju Island, southeastern Yellow Sea (South Sea of Korea) were analyzed for grain-size texture, some geochemical characteristics and clay mineralogy in order to assess their provenance. Rare-earth element compositions and some geochemical discrimination diagrams, especially of Ti/Al, Nb/Al and Rb/Al ratios, were revealed to be useful indices for identifying the origin of sediments. These indices, together with clay mineral compositions, suggest that the coarse-grained sediments originate from the volcanic rocks of Jeju Island, whereas the fine-grained sediments are derived from Chinese rivers, especially the Changjiang River. The oceanic circulation pattern and the physical-chemical properties of seawater in the Yellow and East China seal support the possibility that the fine-pained Changjiang (Yangtze River) sediments can reach the coastal area of Jeju Island (southeastern Yellow Sea). 황해 남동해역의 제주도 연안에 분포하고 있는 퇴적물의 근원지를 조사하기 위해 표층 퇴적물의 입자조직, 지화학 성분 그리고 점토광물 분석이 이루어졌다. 본 연구에서 Ti/AI, Nb/Al 그리고 Rb/Al 비 등을 포함한 특징적인 원소성분도(geochemical discrimination diagram)와 희토류 원소들의 함량 특성은 퇴적물의 근원지를 판단하는데 매우 유용한 지시자들로 제시된다. 이들 결과에 의하면, 연구해역의 세립질 퇴적물은 대부분 증국의 양자강으로부터 기원 ${\cdot}$ 운반 퇴적되었으며, 조질질 퇴적물은 주변 화산암의 풍화 잔류물인 것으로 해석된다. 창해와 동중국해에서 치근 조사된 해수의 순환 패턴과 물리-화학적 특성은 양자강으로부터 기원된 세립 퇴적물이 연구해역을 포함한 한반도 남해(황해 남동해역) 연안역까지 운반 퇴적될 수 있음을 보여준다.

한국 연안 퇴적물 내 중금속 원소의 자연적 배경농도 연구

임동일,최진용,정회수,최현우,김영옥 한국해양과학기술원 2007 Ocean and Polar Research Vol.29 No.4

This paper presents an attempt to determine natural background levels of heavy metals which could be used for assessing heavy metal contamination. For this study, a large archive dataset of heavy metal concentration (Cu, Cr, Ni, Pb, Zn) for more than 900 surface sediment samples from various Korean coastal environments was newly compiled. These data were normalized for aluminum (grain-size normalizer) concentration to isolate natural factors from anthropogenic ones. The normalization was based on the hypothesis that heavy metal concentrations vary consistently with the concentration of aluminum, unless these metals are of anthropogenic origin. So, the samples (outliers) suspected of receivingany anthropogenic input were removed from regression to ascertain the "background" relationship between the metals and aluminum. Identification of these outliers was tested using a model of predicted limits at 95%. The process of testing for normality (Kolmogorov-Smirnov Test) and selection of outliers was iterated until a normal distribution was achieved. On the basis of the linear regression analysis of the large archive (please check) dataset, background levels, which are applicable to heavy metal assessment of Korean coastal sediments, were successfully developed for Cu, Cr, Ni, Zn. As an example, we tested the applicability of this baseline level for metal pollution assessment of Masan Bay sediments.

한국 서해 중부 연안역의 수질환경 특성

임동일,강미란,장풍국,김소영,정회수,강양순,강영실 한국해양과학기술원 2008 Ocean and Polar Research Vol.30 No.4

Spatial-temporal variations in physiochemical water qualities (temperature, salinity, DO, SPM, POC and nutrients) of surface and bottom waters were investigated along the mid-western coastal area (Taean Peninsula to Gomso Bay) of Korea. Spatial distribution patterns of temperature and salinity were mostly controlled by the physical mixing process of freshwater from Geum River and/or Gyunggi Bay with nearby coastal water. A strong tidal front is formed off Taean Peninsula during spring and summer. Seasonal variations in nutrient concentrations, lower in spring and summer and higher in fall and winter, are primarily regulated by magnitude of phytoplankton occurrence rather than freshwater loadings into the bay. Based on seasonal and spatial variability of physicochemical parameters, water quality of the study area can be divided into four water masses; Gyunggi Bay-influenced Water Mass (GBWM), Geum River-influenced Water Mass (GRWM), Yellow Sea Bottom Cold Water Mass (YSBCWM) and Cheonsu Bay Water Mass (CBWM). Water quality of the GBWM (Taean Peninsula coastal area), which has relatively low salinity and high concentrations of nutrients, is strongly controlled by the Gyunggi Bay coastal water, which is under influence of the Han River freshwater. In this water mass, the mixed layer is always developed by strong tidal mixing. As a result, a tidal front is formed along the offshore boundary of the mixed layer. Such tidal fronts probably play an important role in the distribution of phytoplankton communities, SPM and nutrients. The GRWM, with low salinity and high nutrients, especially during the flood summer season, is closely related to physiochemical properties of the Geum River. During the flood season, nutrient-enriched Geum River water mass extends up to 60 km away from the river mouth, potentially causing serious environmental problems such as eutrophication and unusual and/or noxious algal blooms. Offshore (>30~40 m in water depth) of the study area, YSBCWM coupled with a strong thermocline can be identified in spring-summer periods, exhibiting abundant nutrients in association with low temperature and limited biological activity. During spring and summer, a tidal front is formed in a transition zone between the coastal water mass and bottom cold water mass in the Yellow Sea, resulting in intensified upwelling and thereby supplying abundant nutrients to the GBWM and GRWM. Such cold bottom water mass and tidal front formation seems to play an important role in controlling water quality and further regulating physical ecosystem processes along mid-western Korean coastal area. Spatial-temporal variations in physiochemical water qualities (temperature, salinity, DO, SPM, POC and nutrients) of surface and bottom waters were investigated along the mid-western coastal area (Taean Peninsula to Gomso Bay) of Korea. Spatial distribution patterns of temperature and salinity were mostly controlled by the physical mixing process of freshwater from Geum River and/or Gyunggi Bay with nearby coastal water. A strong tidal front is formed off Taean Peninsula during spring and summer. Seasonal variations in nutrient concentrations, lower in spring and summer and higher in fall and winter, are primarily regulated by magnitude of phytoplankton occurrence rather than freshwater loadings into the bay. Based on seasonal and spatial variability of physicochemical parameters, water quality of the study area can be divided into four water masses; Gyunggi Bay-influenced Water Mass (GBWM), Geum River-influenced Water Mass (GRWM), Yellow Sea Bottom Cold Water Mass (YSBCWM) and Cheonsu Bay Water Mass (CBWM). Water quality of the GBWM (Taean Peninsula coastal area), which has relatively low salinity and high concentrations of nutrients, is strongly controlled by the Gyunggi Bay coastal water, which is under influence of the Han River freshwater. In this water mass, the mixed layer is always developed by strong tidal mixing. As a result, a tidal front is formed along the offshore boundary of the mixed layer. Such tidal fronts probably play an important role in the distribution of phytoplankton communities, SPM and nutrients. The GRWM, with low salinity and high nutrients, especially during the flood summer season, is closely related to physiochemical properties of the Geum River. During the flood season, nutrient-enriched Geum River water mass extends up to 60 km away from the river mouth, potentially causing serious environmental problems such as eutrophication and unusual and/or noxious algal blooms. Offshore (>30~40 m in water depth) of the study area, YSBCWM coupled with a strong thermocline can be identified in spring-summer periods, exhibiting abundant nutrients in association with low temperature and limited biological activity. During spring and summer, a tidal front is formed in a transition zone between the coastal water mass and bottom cold water mass in the Yellow Sea, resulting in intensified upwelling and thereby supplying abundant nutrients to the GBWM and GRWM. Such cold bottom water mass and tidal front formation seems to play an important role in controlling water quality and further regulating physical ecosystem processes along mid-western Korean coastal area.