pH와 염이 Pentachlorophenol의 토양 수착평형에 미치는 영향의 정량적 결정

오정은,이동수 한국지하수토양환경학회 1997 지하수토양환경 Vol.4 No.1

Laboratory experiments were conducted to study the effects of pH and salt level on the soil sorption equilibrium of pentachlorophenol (PCP) which is hydrophobic and ionogenic. Experimental results indicated that the sorption equilibrium constant (Kp) of PCP increased with decreasing pH. A quantitative sorption model involving linear isotherms was estabilished to predict the pH effect on the PCP sorption equilibrium over the pH range from 3 to 8. The model prediction was in good agreement with the experimental data. Also, the Kp increased with salt concentration over the entire pH range. At added salt levels less than 0.1M, increase in Kp was larger than when the added levels were higher than 0.1M. Salt might increase the PCP sorption by inducing 'salting out-effect' or by forming deprotonated PCP-cation ion pairs such as PCP$\^$-/K$\^$+/. Taking the pH range (5-8) and the salt content (up to 50 g/L) in the groundwater of Metropolitan landfill sites into consideration, the results indicated that the retardation factor of PCP in this area might range from 3 to 550 depending upon pH and salt content.

간호조직의 지적자본과 조직유효성: 공공병원과 민간병원의 비교

오정은,전경숙,장광심,Oh, Jeong-Eun,Jeon, Gyeong-Suk,Jang, Kwang-Sim 보건의료산업학회 2018 보건의료산업학회지 Vol.12 No.2

Objectives : This study was conducted to examine the differences in the association of intellectual capital with organizational effectiveness of nursing organizations between public and private hospitals. Methods : A total of 166 nurses (82 of public hospital and 84 of private hospital) were recruited for the survey. Nurses' job satisfaction, organizational commitment, intellectual capital, sociodemographics, work-related factors, and health status were measured. Results : Nurses of public hospitals reported significantly higher scores in human capital, customer capital, job satisfaction, emotional engagement, and transactional commitments than did those of the private hospital. Human capital private and structural capital were significantly associated with nurses' job satisfaction in both public and private hospitals. Customer capital was positively associated with the emotional and transactional commitment in the public hospital, while, structural capital was associated with transactional and normative commitment in the private hospital. Conclusions : We could confirm that the nurses' intellectual capital is important the effectiveness of nursing organizations in both public and private hospitals.

다중 안테나를 사용하는 이동통신 시스템에서 CNN 기반 송신 안테나 및 MCS 선택

오정은,조아민,정진곤,정의림 한국통신학회 2023 韓國通信學會論文誌 Vol.48 No.9

This paper proposes a method for selecting transmission antennas and Modulation and Coding Scheme (MCS) in mobile communication systems using multiple antennas based on Convolutional Neural Networks (CNN). The proposed method estimates the signal-to-noise ratio (SNR) by averaging the equalizer output in an Orthogonal Frequency Division Multiplexing (OFDM) system. The conventional approach selects transmission antennas and MCS based on the average SNR value. Computer simulation compares the proposed method with the conventional method. The performance indicators are the accuracy of transmission antenna selection, and communication disconnection probability and throughput for MCS selection. As a result of comparing the performance according to the moving speed, the performance for the transmission antenna selection and MCS selection of the proposed CNN is better than that of using the conventional average SNR. In particular, as the speed of movement increases, the performance gap between the proposed method and the conventional method becomes larger, indicating that larger amounts of data can be processed at a faster rate when the proposed method is used.

공간통계자료를 활용한 도시재생사업 대상지 변화의 시각화 분석 - 대구광역시 2018년 도시재생뉴딜사업지를 대상으로 -

오정은,김진효,이진주,하지만,유지숙,윤철재 한국생태환경건축학회 2023 한국생태환경건축학회 논문집 Vol.23 No.4

Purpose: Urban regeneration projects are important as they involve a large amount of public funds and manpower. However, due to discrepancies between site boundaries and statistical data, the evaluating its effects by ‘Dong’ ministrative units in Korea is limited. Method: This study established criteria to evaluate the effectiveness of the target site and visualized spatial the data using Geographic Information System (GIS). The evaluation indicators were set as the number of productive population in the population and social sector, the number of businesses in the industrial and economic sector, and the number of new buildings in the physical environment sector. The measurement was collected in a square shape of 100×100m as grid boundary data (SHP format) and grid statistics (txt format) between the increase and decrease values between 2017, before the project implementation, and 2021, when the project was being implemented. We compared it with the statistical values of the administrative district units in terms of project type, adjacent area, and special pattern, by evaluation indicator and target area. Result: The results of this study suggest that it is valuable to use GIS to visualize grid-shaped spatial statistical data, to improve the ease and accuracy of measuring evaluation indicators in the project boundary area, and to intuitively grasp the change pattern of diagnostic indicators through exploratory visualization, for monitoring the measurement of project effect evaluation and for setting up hypotheses for follow-up studies.

전기화학식 암모니아 가스센서의 측정환경에 따른 특성 연구

오정은,신재용,이상열,강두수,김갑식,천호상 한국냄새환경학회 2021 실내환경 및 냄새 학회지 Vol.20 No.4

The electrochemical type gas sensor has the advantage of being easy to use due its small size, and it is also relatively inexpensive. However, its output can easily vary depending on temperature and humidity conditions. Therefore, it is important to ascertain the exact output characteristics of a sensor according to the measuring environment in order to improve measurement accuracy for any set of given conditions. The purpose of this study is to obtain basic information about the output characteristics of a sensor that is used both indoor and outdoor according to the variation in temperature and humidity conditions in order to improve the accuracy of the sensor. To achieve this result, a calibration curve was made using ammonia standard gas and the calibration factor was calculated using the calibration curve and the measuring accuracy was confirmed with regard to the ammonia sensor. Based on the test results, the variation of the sensor output value was large in relation to temperature and humidity variation. It was found that the output value from the sensor at higher temperature and humidity conditions was also higher. However, the measuring accuracy of the sensor could be improved by more than 10% by applying the calibration factor and an average accuracy of more than 97% could be achieved. It is anticipated that the result of this study can be used as basic data to obtain more accurate results using electrochemical sensors for a given set of temperature and humidity conditions, and therefore, it can also be considered that the reliability and applicability of electrochemical sensors can be improved.

프랑스의 무슬림 이민자 사회통합을 위한 정책과 과제 : 프랑스의 실패가 한국에 주는 교훈

오정은 한국이민정책학회 2021 한국이민정책학회 학술대회 Vol.2021 No.08

[학술답사] 강화 : 바람의 언덕 공동체마을 / 2022.5.21

오정은 한국주거학회 2023 住居 Vol.17 No.2

세월호 2017(2) : 기억의 방식

오정은 공연과이론을위한모임 2017 공연과 이론 Vol.- No.67

[학술답사] 북촌 : 건축가에게 듣는 ‘요즘 도시한옥의 쓰임새’ / 2022.11.25

오정은 한국주거학회 2023 住居 Vol.17 No.2

LC-MS/MS를 이용한 수질 시료에서의 43종 미규제 미량오염물질동시 분석 가능성 및 실제 시료 적용성 평가

오정은,노효준,문해란,이헌준 한국환경분석학회 2024 환경분석과 독성보건 Vol.27 No.4

this study, a solid-phase extraction (SPE) method with a multi-layer cartridge was employed for the simultaneous analysis of river water for 21 pharmaceuticals and 22 pesticides. Accuracy, precision and recovery of internal standards were satisfactory and met the requirements of the EPA Method 1694. In the case of amoxicillin, analytical conditions were optimized using methanol adduct as a precursor ion, resulting in higher analytical sensitivity than the original compound. The method detection limits (MDLs) were similar to or lower than those reported in domestic and international studies. When the simultaneous analytical method used in this study was applied to river water samples, 25 out of 43 target compounds were detected. Although their concentration levels are about 100 times lower than international water quality standards, continuous monitoring is required due to the high detection frequency of some compounds for which domestic research data are lacking.