이 논문은 한국산업경영시스템학회 연구윤리위원회 심의(2024.7.3.)결과, 중복게재가 확인되어 게재가 철회된 논문임. This study is to identify the maintenance service quality of eco-friendly cars, which are rapidly increasing recently. Research is conducted by synthesizing research from the perspectives of internal employees and external customers by using the service profit chain model. Specifically, it is to study the overall structural relationship between internal customer satisfaction, physical quality, interaction quality, outcome quality, external customer satisfaction and long-term orientation. For the study, 202 questionnaires were collected from internal employees and 204 questionnaires from external customers. The results of testing the research hypotheses targeting the internal employee group are as follows. As a result of testing hypothesis 1, internal customer satisfaction has a significant positive (+) effect on physical quality and interaction quality. As a result of testing hypothesis 2, the service quality of eco-friendly car maintenance has a significant positive (+) effect on each other. As a result of testing hypothesis 3, physical quality and outcome quality have a significant positive (+) effect on external customer satisfaction. The results of testing the research hypotheses targeting an external customer group are as follows. As a result of testing hypothesis 2, in the relationship between eco-friendly car maintenance service quality, physical quality has a significant positive (+) effect on interaction quality, and interaction quality has a significant positive (+) effect on outcome quality. As a result of testing hypothesis 3, interaction quality and outcome quality have a significant positive (+) effect on external customer satisfaction. As a result of testing Hypothesis 4, external customer satisfaction has a significant positive (+) effect only on intention to reuse. Finally, as a result of examining the difference in perception between the internal employee group and the external customer group in eco-friendly car maintenance service quality and external customer satisfaction, it was verified that there was a significant difference only in outcome quality and external customer satisfaction.

배경/목적: 총담도 결석 혹은 종양으로 인한 담도 폐쇄에서 내시경적 접근이 어려운 경우, 경피경간담도배액술과 동시에 유두부 풍선확장술을 진행한 결과를 후향적으로 분석하여 시술의 안정성 및 간편화에 대해 알아보고자 하였다. 방법: 2012년부터 2015년까지 4년간 단일기관에서 종양 및 담도 결석으로 인한 담도 폐쇄를 진단받고 경피적 접근을 통해 시술한 환자 21명을 후향적으로 조사하였다. 결과: 21명 중 16명(76.2%)의 환자에서 경피경간담도배액 술과 동시에 유두부 풍선확장술을 진행하였고, 나머지 5명 (23.8%)은 담도배액술 5-8일 후에 시술을 진행하였다. 21명의 환자 중 19명(90.5%)에서 잔류 결석이나 재협착 없이 한 차례 만의 시술로 성공하였다. 나머지 두 명은 각각 2회, 3회 PBD 시행 후 결석 제거에 성공하였다. 결론: 내시경을 시행하지 못하는 환자들에 대한 경피적 접 근을 통한 시술은 안전하고 효과적이라고 할 수 있으며, 특별 한 금기가 되지 않는 한 경피경간담도배액술과 동시에 시행하 는 유두부 풍선확장술은 환자의 불편 및 시술 횟수를 감소시킬 수 있다.

This study was conducted to improve the effect of environment-friendly Tetranychus urticae pesticide through the development of Tetranychus urticae biopesticide using the plant extract. Tested extracts were fig leaf extract, viburnum erosum extract; besides Sophora flavescens Ait extract, Derris root extract, Tobacco leaf extract, and they were proved to be the caricidal effect of two spotted spider mite adults by spraying on the French bean leaf inoculated for Tetranychus urticae with each concentration; 500ppm, 200ppm, 100ppm, 50ppm. In the control treatments, caricidal effect was compared with only ‘Eungsami’ (500ppm, 200ppm, 100ppm, 50ppm), of which the main ingredient as environment-friendly organic material is, and distilled water. The caricidal effect of tested extracts to the two spotted spider mite adult was the highest in the Sophora flavescens Ait extract and Tobacco leaf extract over 90%, and comparatively low in the Derris root extract. When the caricidal effect of ‘Eungsami’ was compared with two spotted spider mite adults with each concentration, ‘Eungsami’(500ppm) and Tobacco leaf extract(500ppm) were very excellent as each 95.5%, 98.7% in treated concentration. The effect of Sophora flavescens Ait extract was also high as 96.5%. In the low concentration(50ppm), Sophora flavescens Ait extract was 45.8%, Tobacco leaf extract was the most effective as 53.8%.

Cellular imrnortali zation is thought to be an ear ly event during tumorigenesis. Telomerase reacLi vaLion by ecLopic hTERT expression is widely used for cellular imrnortali zation. This study was a imed Lo a na lyze establi sh immortalized human ora l epithelial cells(IOEC) and to reconstruct oral precancerous lesion by Lhree dimens iona l cultures. Telomerase activity was analyzed by Telomerase assays and Telomere longLh W:lS dcLccLcd by Termina l restri ction I"ragment analysis. bTERT gene was assayecl by tbe RT-PCR. p16lNK4 a‘ pHb. CDK2. P21CIP1. p27 and p53 were examined by western blotting. Three dimensiona l cu1ture using air - liquicl inLe rl"ace was pe rl"ormed. As results. IOEC was establi shed by ectopic ex pression of catalytic subunit• of telomerase‘ h1'EH1'. which is con tinuously maintained for more tban 120 population doublings(PDs) . IOEC showecl the expression 01" h1'ER1' and h1'H mHNA‘ elongated telomere length and higher telomerase activity. These cel ls showed no ex pression of p16lNK4a with retention 01" pRb and CDK2. Expression of p21CIP1. p27 a nd p53 may have no relation to immorta li ze oraJ epithelial cell s. Three dimensional culture of IOEC showed dysplastic strat ilïed epithelia l cell s. These results may serve as a useful moclel system for the study of oral carcinogenesis.

This study aims to observe the inhibition of methane generation, the decomposition of organic matter, and the trend of outflowing leachate, using the simulated column of the anaerobic sanitary landfill structure of sulfate addition type which is made by adding sulfate to a current anaerobic landfill structure, and the simulated column of semi-aerobic landfill structure in the laboratory which is used in the country like Japan in order to inhibit methane from a landfill site among the gases caused by a global warming these days, and at the same time to promote the decomposition of organic matter, the index of stabilization of landfill site. As a result of this study, it is thought that the ORP(Oxidation Reduction Potential) of the column of semi-aerobic landfill structure gradually represents a weak aerobic condition as time goes by, and that the inside of landfill site is likely to by in progress into anaerobic condition, unless air effectively comes into a semi-aerobic landfill structure in reality as time goes by. In addition, it can be seen that the decomposition of organic matter is promoted according to sulfate reduction in case of R1, a sulfate-added anaerobic sanitary landfill structure, and that the stable decomposition of organic matter in R1 makes a faster progress than R2. Moreover it can be estimated that R1, a sulfate-added anaerobic sanitary landfill structure has an inhibition efficiency of 55% or so, compared with R2, a semi-aerobic landfill structure, in the efficiency of inhibiting methane.