• 보건의료산업학회지
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• 제11권4호
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• pp.41-51
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• 2017

Objectives : This study investigates the association between weather conditions and the rate of no-shows at an academic medical center. Methods : Electronic data regarding medical appointments atover the course ofone academic year (2016.03~2017.02) were used for analysis. Characteristics of weather conditions and the daily number of no-shows were compared by Chi-square test. A logistic regression was run to determine if certain aspects of weather affected the rate of no-shows. Results : The results reveal an overall no-show rate of 6.8% that appears to vary in accordance with specific weather conditions. Lower average temperatures, in particular, corresponded with a higher rate of no-show patients. This may indicate that o-show rates in autumn and winter can be expected to exceed those during spring. Conclusions : This study investigates the association between no-show patients and weather conditions, and offers suggestions for augmenting this loss. One recommendation is to begin conducting investigations nationwide in order to provide more useful information.

• 미래기술융합논문지
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• 제3권1호
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• pp.43-49
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• 2024

미용 산업은 경제성장과 함께 경쟁력 있는 서비스 산업으로 성장하고 있으며, 특히 네일아트는 최근에 급속한 성장을 보이고 있다. 최근 예약 시스템을 통해 개인의 시간 관리를 효율적으로 하려는 노력이 있지만, 예약부도나 노쇼라는 문제가 사회적으로 큰 이슈로 대두되고 있으며 이는 경제적인 문제로도 이어지고 있다. 본 연구는 네일샵에서의 예약부도 문제에 대해 인지하고 이를 방지를 위한 개선방안을 모색하고 이 분야의 기반 연구 자료를 제공하는 데에 도움이 되고자 하였으며, 연구 대상자로는 대전·충청지역에 거주하고 있는 네일샵 이용 고객 476명을 대상으로 설문조사를 진행하였다. 수집된 설문 자료는 통계프로그램 SPSS 24.0를 이용하여 분석하였으며 연구 결과를 종합해보면, 예약부도의 가장 큰 원인은 단순변심으로 나타났으며, 이를 줄이기 위해서는 기업의 노력뿐만 아니라 소비자들이 예약에 대한 중요성을 인지해야 한다는 것을 알 수 있다. 이에 예약부도율을 줄이기 위한 방안으로 취소 수수료 지불제, 예약금 환불 불가제, 재 예약 불가제, 벌점제, 선결제 등을 제안하고자 한다. 하지만 현재 뷰티 업계에서는 예약부도에 대한 체계적인 규정이 없는 실정으로, 추후 예약 관련 규정이 명시된 후의 연구가 필요하다고 사료된다.

• 한국치위생학회지
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• 제11권4호
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• pp.595-602
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• 2011

Objectives : This study purpose were the effect of toothbrushing for decreasing halitosis for gingivitis and periodontitis patients. Methods : The university staffs were examined oral condition and analysised a change of oral health state score after using 3 types of toothbrushing. Results : The results were as followed : OHI-S shows that the decreasing effect takes place in the M. bass method and Tooth pick method, but shows no differences by each method. GI for Self test method shows decreasing effect after 2nd week during education while the M. bass method and Tooth pick method shows after 1st week during education. The M. bass method shows much greater effect of halitosis amongst 3 kind of method. PI for Self test method and Tooth pick method show decreasing effect. Decreasing effect during education shows until 2nd week by 3 kind of method, but it shows no differences after 3rd week. VSC(ppb) for M. bass method and Tooth pick method show decreasing effect. Decreasing effect during education shows after 3rd week by 3 kind of method, but it shows no differences until 2nd week. PHP for Self test method, M. bass method and Tooth pick method show decreasing effect after 2nd week during education. But, there is no differences of decreasing effect by among 3 kind of method. Conclusions : This study reports that it is necessary to carry outt further studies on the improvement of oral health management of adults based on the development of oral health education.

• 환경영향평가
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• 제19권1호
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• pp.99-106
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• 2010

The project of Cheonggyecheon revived the 5.8 kilometer stream and it removed the cover of stream and Cheonggye elevated road. It was begin October of 2003 and completed October of 2005. The purpose of this study is to analyze the air pollution change of Cheonggyecheon area and neighboring area from before and after the project. The change of concentration is compared with an air monitoring station data and measurement data. The analyzed pollutants are $NO_2$, $PM_{10}$, heavy metal, VOC which are measured at Cheonggyecheon and neighboring area. As the results, $NO_2$ concentration shows 10 % decreases in Cheonggyecheon area and neighboring area shows 16 % decreases by Chenoggyecheon restoration, and $PM_{10}$ concentration shows 15 % decreases in Cheonggyecheon area and neighboring area shows 16 % increases. One of VOC, benzene is increased in Cheonggyecheon area compared with neighboring area but Toluene, Ethylbenzene, m+p Xylene increased in neighboring area. After the Cheonggyecheon restoration, The heavy metals are not shows the improvement, but $PM_{10}$ and $NO_2$ concentration improved more than the changes of neighboring area. These improvements of pollution due to reduction of transportation and clearing of elevated road by Cheonggyecheon restoration project.

• 한국전자거래학회지
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• 제22권1호
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• pp.37-49
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• 2017

병원 진료의 효율성과 진료 품질의 극대화를 위해 진료예약을 시행하고 있다. 그러나 예약일에 방문하지 않는 예약부도로 인해 의료서비스 자원이 낭비되고 다른 환자의 진료기회를 박탈하는 등 현대 병원 운영에서 주요한 이슈의 하나로 떠오르고 있다. 이러한 예약부도의 원인을 분석하기 위해 미국의 한 보훈병원의 5만 건 진료예약 데이터를 대상으로 예약부도 요인의 중요도와 유의성을 검정하였다. 랜덤 포레스트와 로지스틱 회귀분석 결과, 예약대기시간, 방문율, 내원거리, 예약부도율, 환자 나이, 중증도, 질병의 복합도, 만성통증, 우울증, 약물의존 등이 주요한 원인으로 파악되었다. 예약대기시간과 방문율, 내원거리, 예약부도율은 SMS 사전 통지를 강화하고 사후 전화 상담을 통해 점진적으로 개선 가능할 것으로 판단되며 기타 요인에 대해서는 환자 그룹별로 차별화된 대응방안을 구성하는 것을 고려해 볼 수 있다.

• 한국전자거래학회지
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• 제22권4호
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• pp.53-69
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• 2017

본 논문에서는 환자들의 임상특성이 예약 부도에 미치는 영향을 분석하고자 한다. 미국의 한 보훈병원에 있는 7,055명 환자들의 진단 상병명과 그들의 예약 부도 데이터를 이용하여 진단 상병에 따른 예약 부도의 차이, 진단 상병의 개수에 따른 차이에 대해서 분석 및 비교를 실시하였다. 약물 중독, 우울증과 같은 정신질환과, 고혈압과 같은 만성 질환에서 예약 부도가 유의하게 높게 나타났다. 진단 상병의 개수가 증가할수록 예약 부도가 감소하는 것을 확인할 수 있으나, 진단 상병의 개수가 4개를 넘어서면 예약 부도가 통계적으로 유의하게 감소하지 않는 것으로 나타났다. 이러한 통계적 분석 과정을 통해 의료 환경에서 수행하고 있는 진료 및 예약 부도 관리의 문제점을 식별하여 제시하였다. 본 논문의 결과는 병원의 예약 부도에 대한 해결책을 찾는데 이용될 수 있다고 판단된다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.374-377
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• 2005

The distribution and changes of tropospheric nitrogen dioxide ($NO_2$) are analyzed using the satellite measurements data from GOME (Global Ozone Monitoring Experiment) and SCIMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY). We produced global maps of tropospheric $NO_2$ for 4 seasons using GOME measurements from January 1997 to June 2003. The global distribution shows high values in regions with dense population and high industrialization. Tropospheric $NO_2$ shows obvious seasonal changes depending on its emission and lifetime. Based on the good agreement between two instruments in the time period of overlapping measurements (January 2003-June2003), we linked SClAMACHY data to the GOME time series. The combined time series over the past decade indicate that $NO_2$ 1evels over China are rapidly increasing while those over Europe are decreasing. We also discussed potential application of spaceborne instruments in detecting and characterizing long-distance transport of $NO_2$.

• International Journal of Automotive Technology
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• 제2권2호
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• pp.77-83
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• 2001

Effect of ethene on the $DeNO_X$ conversion process in a simulated diesel engine operating conditions was investigated experimentally and theoretically. With the addition of even a small amount of ethene the NO to $NO_2$ conversion enhances greatly. The energy required to convert one NO molecule is 27 eV with 250 ppm ethene added, while 137 eV without ethene at 473 K. The effect of energy density, temperature, and the initial concentrations of ethene and oxygen are also discussed and the results show that the increase of the mentioned parameters lead to the promotion of NO oxidation. A kinetic model used in this study shows good agreement with the experimental result. Byproducts like formaldehyde ($CH_2$ 0) and methyl nitrite ($CH_3$ ONO) predicted by model calculation are broken up into CO and $H_2O$ eventually when high energy is delivered to the gas mixture. Sensitivity analysis shows that the main reactions of NO oxidation when ethene is added we: $HO_2+ NO \arrow NO_2 + OH, RO_2 + NO \arrow NO_2 + RO$, where R is a hydrocarbon radical. Also the direct oxidizing reaction of NO with O cannot be neglected.

• 한국자동차공학회논문집
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• 제17권1호
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• pp.154-161
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• 2009

This study is a part of project of urea-SCR system development for an in-use medium duty diesel engine. This study shows the effect of ammonia oxidation catalyst and SCR volume on $NO_X$ reduction performance. When AOC(Ammonia Oxidation Catalyst) is not used, the urea injection should be controlled accurately to prevent $NH_3$ slip. However, it is found that the accurate $NH_3$ slip control is not easy without AOC in real engine operating conditions, because $NH_3$ and $NO_X$ reaction characteristics change with many factors such as exhaust gas temperature and $NH_3$ absorbance on SCR. SCR volume is also one of important design parameters. This study shows that $NO_X$ reduction efficiency increases with increase of SCR volume especially at high space velocity and low exhaust gas temperature conditions. Additionally, this paper shows the emissions of EURO-2 medium duty diesel engine can be improved to the level of EURO-5 with a DPF and urea-SCR system.

• 한국항해항만학회지
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• 제36권9호
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• pp.721-728
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• 2012

Marine traffic safety of the Vung Tau Waterway, from port limit to Ganh Rai Gulf, plays a crucial role in the economic development of the important triangular economic zone in the south of Vietnam: Ho Chi Minh City, Dong Nai Province, Ba Ria-Vung Tau Province. This paper uses the IWRAP Mk2 program to assess marine traffic safety and shows that in the area there are three parts of fairway have highest risk of collision (from buoys No. 8-9 to buoys No. 1-2 of the Song Dinh fairway; from buoy No. 0 to buoys No. 8-9 and from buoys No. 6-9 to buoys No. 8-9A of the Sai Gon-Vung Tau fairway) and the two areas have highest risk of grounding (the Vung Tau coastline from Ganh Hao to Sao Mai and an area in the Ganh Rai Gulf). In addition, the result of a questionnaire survey on a group of Pilots shows that wind, current and rain/fog have considerable negative effect to ship handling of large vessels in this area. This paper's results will be used in the further research to discover solutions for improving marine traffic safety in the Vung Tau Waterway.