• 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.

• 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.

• 대한약침학회지
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• 제12권3호
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• pp.73-79
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• 2009

Objectives : This study was performed to investigate the anti-inflammatory and anti-oxidantic effects of GaeYongHwan(GYH) extract which has been used for patients with acnes. Methods : Anti-inflammatory and anti-oxidantic effects of GYH extract were tested in terms of inhibitory ability of Nitric oxide(NO) production, 1,1-diphenyl-2-picrylhydrazyl(DPPH) radical scavenging activity and anti-bacterial effects against Propionibacterium acnes(P. acnes). Results : 1. All GYH treated groups did not show cytotoxicity. 2. Treatment with $100{\mu}g/m{\ell}$ of GYH extract lowered production levels of NO significantly compared to non-treated control or normal. 3. All of GYH treated groups did not show DPPH free radical scavenging activities. 4. All of GYH treated groups did not show anti-baterial action against P. acnes. Conclusions : These results imply that GYH extract has anti-inflammatory effect to treat acnes.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2023년도 제67차 동계학술대회논문집 31권1호
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• pp.243-246
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• 2023

'서비스를 이용하겠다고 예약을 했지만, 취소나 연락 없이 장소에 나타나지 않는 행위'를 가리키는 일명 노쇼(No-Show, 예약부도)가 사회적 문제로 떠오르고 있다. 이는 음식점을 비롯하여 열차, 고속버스, 병원, 미용실 등 예약 시스템이 갖춰진 사회 곳곳에서 발생하여 사회적·경제적 손실을 일으키고 있다. 그리고 이러한 노쇼는 자영업자의 경제적 손실로 직결되어 이들의 생존을 위협하기에 이르렀다. 음식점의 경우 노쇼로 인해 식재료 손실과 함께 해당 테이블에 다른 고객의 예약을 받지 못하는 2차 피해 발생이 가능하다는 점에서 타 업종에 비해 리스크 부담이 상당하다. 본 연구는 기존 식당 예약 웹 어플리케이션의 경제성·편의성·접근성을 취하는 동시에, 예약금 제도를 통해 노쇼의 비중을 줄이고, 노쇼가 발생한 고객 현황을 계측하여 관리할 수 있는 관리자 권한의 기능을 제공해 손실을 최소화하도록 돕는 웹 어플리케이션을 개발하는 것에 목적을 두고 있다.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제14권4호
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• pp.249-273
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• 2010

Often in practice, the implied volatility of an option is calculated to find the option price tomorrow or the prices of, nearby' options. To show that one does not need to adhere to the Black- Scholes formula in this scheme, Figlewski has provided a new pricing formula and has shown that his, alternating passive model' performs as well as the Black-Scholes formula [8]. The Figlewski model was modified by Henderson et al. so that the formula would have no static arbitrage [10]. In this paper, we show how to construct a huge class of such static no arbitrage pricing functions, making use of distortions, coherent risk measures and the pricing theory in incomplete markets by Carr et al. [4]. Through this construction, we provide a more elaborate static no arbitrage pricing formula than Black-Sholes in the above scheme. Moreover, using our pricing formula, we find a volatility curve which fits with striking accuracy the synthetic data used by Henderson et al. [10].

• Journal of Mechanical Science and Technology
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• 제18권3호
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• pp.499-512
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• 2004

The effects of swirl intensity on non-reacting and reacting flow characteristics in a flat flame burner (FFB) with four types of swirlers were investigated. Experiments using the PIV method were conducted for several flow conditions with four swirl numbers of 0, 0.26, 0.6 and 1.24 in non-reacting flow. The results show that the strong swirling flow causes a recirculation, which has the toroidal structures, and spreads above the burner exit plane. Reacting flow characteristics such as temperature and the NO concentrations were also investigated in comparison with non-reacting flow characteristics. The mean flame temperature was measured as the function of radial distance, and the results show that the strong swirl intensity causes the mean temperature distributions to be uniform. However the mean temperature distributions at the swirl number of 0 show the typical distribution of long flames. NO concentration measurements show that the central toroidal recirculation zone caused by the strong swirl intensity results in much greater reduction in NO emissions, compared to the non-swirl condition. For classification into the flame structure interiorly, the turbulence Reynolds number and the Damkohler number have been examined at each condition. The interrelation between reacting and non-reacting flows shows that flame structures with swirl intensity belong to a wrinkled laminar-flame regime.

• 한국병원경영학회지
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• 제22권4호
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• pp.50-60
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• 2017

Purposes: The purpose of this study was to identify the preferred types of the hospital reservation cancellation management to help reduce the reservation cancellations. Methodology: This study sampled 327 outpatients or their guardians who had reserved a university hospital and a general hospital located in the southwestern part of Seoul, and the responses from 300 of them were used for the final analysis. The subjects' preferences of reservation cancellation management types were analyzed in reference to their demographic variables. The timing and frequency of pre-notification preferred by the subjects were examined. A multidimensional scaling methods and correspondence analysis was used to identify preference for management methods of no-show and type of reservation guide. Findings: As a result, 77.3% of the respondents were perceived that the reservation cancellation was a habit. The most preferred method of managing the reservation cancellation would be refusal to refund the reservation deposit (61.7%), followed by payment for cancellation (16.0%), limit of future reservations (16.0%) and penalty (6.3%) in their order. 186 of the subjects (62.0%) preferred the texting for prevention of reservation cancellations, and 102 of the subjects (34.0%) preferred the phone calls. The preferred timing and frequency of the SMS were twice 3 days before, once a day before and three times 7 days before, while the preferred timing and frequency of phone call was once a day before. Practical Implications: The no-show rate can be improved by enhancing SMS pre-notification and by improving afterwards telephone counseling. For other factors, it needs to study on the service differentiation with the characteristics of each patient group.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1997년도 춘계학술대회논문집
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• pp.136-139
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• 1997

Applications of commercial software DEFORM-3DTM for 3-D simulation in extrusion process are developed for the analysis of twisting of extruded products. Because the elliptical shape has at least one line symmetry, the twisting is not occured during the extrusion. But, the results of extrusion simulation of the elliptical shape show that the twisted boundary of the die surface makes the material inside die surface rotate with the constant angular velocity. Otherwise, the simulation results of the S shaped product show that the twisting can be occured by the only 180$^{\circ}$rotation symmetry of S shape without no line symmetry and show that the angular velocity increases by the only 180$^{\circ}$rotation symmetry without no twisted die surface between on the die entrance section and on the die exit section. The results of the analysis show that the angular velocity of the extruded product changes with die length and friction condition.

• 대한가정학회지
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• 제34권4호
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• pp.227-247
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• 1996

This study explores the relationship between attitudes toward abortion and such variables as age, education, religion, working, family income, son preference, and abortion experience. Questions are asked to see whether or not respondents think it should be possible to obtain legal abortion in nine circumcestances. Logit analysis is executed to see the relationship between abortion attitudes and explanatory variables for all respondents and then for women with abortion experience and for those without. Women with abortion experience are more likely to favor abortion than those without the experience. Catholics show tendency to oppose to legalized abortion compared to women with no religion. Women who show higher son preference are more likely to oppose to abortion in case of pregnancy by rape. Women who are working then to show favorable attitudes toward abortion in case of women who want no more child. Women who have low income and abortion experience have than young women. The more educated women show the more favorable attitudes toward abortion.

• 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.