• 한국분무공학회지
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• 제21권3호
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• pp.130-136
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• 2016

NOx and PM are important air pollutants as vehicle management policy aspect. Medium-duty truck is the main source of the pollutants although the vehicle market share is only 3.5%. National emission portion of NOx and PM form the mobile sourece are 14% and 16% respectively. In this study it was investigated that characteristics of air pollutants emission on medium duty truck equipped with EGR and SCR system. Vehicle's test reflected driving cycle on the chassis dynamometer, and applied test cycle was WHVC(World Harmonized Vehicle Cycle) mode. The test cycle include three segments, represent urban, rural and motorway driving. Based on the test results NOx, PM, HC were less emitted form SCR vehicle than EGR vehicle. And CO was less emitted form EGR vehicle than SCR vehicle due to CO oxidation reaction on DPF surface. And most air pollutants reduced as average vehicle speed increased. Pollutants were less emitted on motorway section than urban and rural sections. But highly NOx emission on motorway section was verified according to increased EGR ratio on fast vehicle speed. HC and CO additional emission was identified as 68%, 58% respectively during SCR vehicle's cold engine start emission test. NOx additional emission was detected by 24% on SCR vehicle's condition of engine cold start while not detected on vehicle equipped with EGR. SCR vehicle's additional NOx emission was derived from low reaction temperature during engine cold start condition. medium-duty truck emission characteristics were investigated in this study and expected to used to improve air pollutants management policy of medium-duty truck equipped with SCR & EGR.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 D
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• pp.3040-3042
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• 2005

During the last several years, interest in broad-band power line communications (PLC) has been grown over medium voltage(MV) power distribution lines as well as low voltage lines. This paper introduces a medium voltage PLC test field that is set up in the suburbs of Euiwang city in Korea. This test field could be used not only for the measurement of communication channel environment but also for internet service. This paper shows the configuration of medium voltage test field with network devices like MV signal coupler and the results of channel environment like noise and impulse response. It also shows the service performance of PLC access network through network management system.

• 한국유통학회지:유통연구
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• 제4권2호
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• pp.1-20
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• 1999

This study aims to provide distributors with several implications on the channel strategy by testing factors which influence on the offsetting investment. Medium-sized distributor facing a relatively inferior power can cause profit vulnerability from large manufacurer's opportunistic behaviors. At the same time, we tested the relationship commitment to the relation with manufacturer as another alternative strategy taken by medium-sized distributer. For this research, samples from dealers in oil-petroleum refinery industry were selected and the data was collected using mail survey. The data was analyzed utilizing validity test, reliability test, factor analysis, correlation analysis and LISREL. The major analyzed results are as follows: First, the offsetting investment of preventing loss from manufacturer's opportunism didn't affect medium-sized distributor's sales empirically. Second, the hypothesis that the more the medium-sized distributor's transaction specific assets which they invest in the transactional relationship with manufacturer, the more the safeguard against the expected opportunism of manufacturer was not supported by the results. Third, the more use of coercive power by the manufacturer, the more increase in the perception of expected opportunism of manufacturer by the medium-sized distributor, it make stimulates offsetting investment as safeguard by medium-sized distributor and it has negative effect on developing commitment. Finally, the large manufactures dealing with a medium-sized distributor firm which had a reputation of fairness didn't make offsetting investment as a response for distributor's opportunism.

• Advances in Traditional Medicine
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• 제4권2호
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• pp.120-123
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• 2004

To test preschool children's medium- long distance stereoscopic vision normal average value, and intermittent strabismus children,s medium-long distance stereoscopic vision acuteness is the goal of this study. The software of random stereoscopic vision and graph, which is developed by Hu-Chong etc has been used, to test 414 cases normal preschool children and 19 cases intermittent exotropia childrens medium-long distance (1-5 m) stereoscopic vision (before operation and after operation). The normal average value of preschool children's medium-long distance stereoscopic vision was achieved. Intermittent exotropia children's stereoscopic vision acuteness was declined with the increase of distance. This method can provide reference as screening abnormal stereoscopic vision during scientific research and clinical work.

• 약학회지
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• 제53권6호
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• pp.328-333
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• 2009

Contrast media are substances that are used to enhance the contrast of structures or fluids within the body in medical imaging. Those are commonly used to enhance the visibility of blood vessels and the gastrointestinal tract. The aim of this study is to evaluate patients who got injected iopamidol, developed as one of contrast medium regarding changes in cardiovascular system and especially, adverse drug reactions. This study were performed on randomly selected a total of 51 patients (range of 15~85 years old) who got injected contrast medium, Iopamidol at a P hospital in Gyeonggi province from September 22nd, 2008 to January 24th, 2009. Data were collected by questionnaire though person to person. We analyzed the data by SPSS (Version 12. for windows). Methods of analysis were frequency and cross analysis. In results, 19.6% (n=10) were founded for adverse drug reactions of contrast medium. 25.0% (n=4) of 10 patients who had adverse drug reactions of contrast medium had took abdomen contrast test. 2 patients of those took contrast test for chest. Also, 3.9% (n=2) patients felt vomiting and nausea after injection of contrast medium. In conclusion, 19.6% patients experienced adverse drug reaction of contrast medium. Therefore, when taking radiation test, we should make efforts to minimize adverse drug reactions to achieve suitable and effective treatment.

• 상하수도학회지
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• 제23권1호
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• pp.121-128
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• 2009

Objectives of this study were to investigate influencing factors of detention time, particle size distribution, and filter medium characteristics for waterworks sludge dewatering. The stepped pressure filtration was carried out with lab scale apparatus and the filter press pilot test for dewatering was conducted at the water treatment plant. Effects of filter medium and polymer dose were examined through observing water content and dewatering velocity and cyclic dewatering rate with filter press pilot test. Relationships among detention time, particle size distribution and filtration resistance were analyzed. Prolongation of sludge detention time was found to cause blinding phenomenon in cake and filter medium and to decrease dewatering process efficiency. The average specific resistance increased according to detention time. In pilot test of dewatering for thickened sludge with Nylon Multi-NY840D and Nylon Mono-100% filter media, dewatering velocities were 0.92 and $0.93kg\;DS/m^2{\cdot}hr$ according to 0.1% polymer dose of dried solids weight base. And cyclic dewatering rates were 2.45 and $2.50kg\;DS/m^2{\cdot}cycle$ cycle for the Nylon Multi-NY840D and Nylon Mono-100% media. Dewatering velocity of polymer dosed sludge was observed to be higher than that of non-polymer sludge.

• 보건의료산업학회지
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• 제9권3호
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• pp.1-11
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• 2015

Objectives : The aim of this study was to identify the relationship between Organizational Citizenship Behavior (OCB) and quality of service (QoS) on pay satisfaction for employees at small-and medium-sized hospital that adopted an annual salary system. Methods : The subjects were 136 employees working at 2 Small-and Medium-sized Hospitals in Seoul and Daejeon. The data were collected from May 11 to May 22, 2015 using a structured questionnaire. For data analysis, descriptive statistics, Pearson correlation coefficient, t-test, ANOVA and Scheffe test were used with the SPSS 21 package. Results : The mean score for pay satisfaction perceived by the employees at small-and medium-sized Hospitals that adopted an annual salary system was 1.74. The mean score for OCB and QoS was 4.02 and 4.43, respectively. The pay satisfaction perceived by the employees at small-and medium-sized Hospitals that adopted an annual salary system were positively related to the OCB. Pay satisfaction was positively related to the QoS; however, it was not statistically significant. The OCB and QoS showed a significant difference in age, marital status, and education level. Conclusions : Small and Medium sized Hospitals have to develop an efficient pay management system which evaluates the CSFs and KPI of every department or staff member.

• 한국식품과학회지
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• 제26권5호
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• pp.526-531
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• 1994

한국인의 장내 균총 조사를 하던 중 Bifidobacterium 선택배지로 개발된 Mitsuoka의 BS배지에서 상당수의 Bifidobacterium이 사멸되는 것으로 나타났다. 이에 보다 개량된 Bifidobacterium의 선택배지를 조제하기 위하여 한국인들로부터 Bifidobacterium들을 비선택 배지및 기존의 선택배지에서 분리한 뒤 동정하였다. 분리 동정된 균주들에 대하여 항생제와 대사저해제에 대한 감수성 조사 및 특이 기질검사를 하여 선택배지 조제의 기초 자료로 활용하여 Bifidobacterium이 선택적으로 자랄 수 있는 배지로 TP배지를 고안하였다 TP배지는 상용되는 Mitsuoka의 BS배지보다 Bifidobacterium 선택성이 우수하였고 colony 성장속도도 빨랐다.

• 한국재난정보학회 논문집
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• 제15권3호
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• pp.402-408
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• 2019

연구목적 : 포소화설비에 사용되는 중발포 소화약제는 기류에 영향이 적어 방출거리를 유지 할 수 있을뿐만 아니라 소화약제도 효율적으로 사용 할 수 있기 때문에 중발포기를 이용하여 발포배율 및 소화성능을 실험으로 밝히고자 한다. 연구방법 : 본 연구를 위해 중발포 시험장치를 제작하여, 합성계면활성 제포를 대상으 로 유류화재(B급) 소화성능 및 발포배율 분석과 포소화약제 소모량을 측정하고 분석하였다. 연구결과: 중발포기로 발포배율을 측정한 결과 팽창율이 26.1배의 중발포 배율로 나타났으며, 유류화재 20단위 소화모형 실험결과 소화시간이 고발포 및 저발포 보다 빠르게 나타나, 수동식설비인 호스릴 또는 중발포기 적용이 가능할 것으로 본다. 결론: 본 연구를 통해 중발포 포소화약제 발포성능 및 소화성능이 우수하게 나타나는 점을 고려하여 중발포 소화약제를 활용한 호스릴 또는 중발포기의 기술기준 도입이 필요하다.

• 한국간호교육학회지
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• 제27권2호
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• pp.152-162
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• 2021

Purpose: The purpose of this study was to examine the effect of nursing record education on the knowledge and performance of nursing record of nurses at small- and medium-sized hospitals. Methods: The participants were 62 nurses working in two small- and medium-sized hospitals. Thirty-two nurses comprised the experimental group, and 30 nurses comprised the control group. Nursing record education was provided for the experimental group. Data were analyzed by x²-test and t-test analysis using the IBM SPSS statistics 25.0 Program. Results: After education, the knowledge (t=2.43, p=.019), performance (t=2.19, p=.033) and behavior scores (t=2.42, p=.018) on nursing record were significantly higher in the experimental group than in the control group. Based on this result, nursing record education is an effective intervention to improve nurses' knowledge and performance in writing nursing records in small- and medium-sized hospitals. Conclusion: We suggest the development of a systematic and standardized education program on nursing record including its legal aspects, for nurses in small- and medium-sized hospitals. The results of this study can be used as basic data for developing a nursing record education program for small- and medium-sized hospitals.