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정재권 ( Jae Kwon Chung ),박도형 ( Do Hyung Park ),이동원 ( Dong Won Lee ),정여진 ( Yeo Jin Chung ) 한국경영공학회 2014 한국경영공학회지 Vol.19 No.4
This study investigates the applicability of a growth curve model for the Korean theater industry. In terms of market size, the theater industry in South Korea has grown with the efforts of production companies for example “The Best Plays” festival. However, most theater production companies especially play producers, struggle to obtain sufficient investments and pay a sufficient wage to their staff. Furthermore, it has been found that for play productions, important decisions, such as estimating demand and deciding when to discontinue a production, are made based on gut feeling. In fact, the play industry has received little attention in the business management related literature; thus, to support the theater industry, specifically management of play productions, this study investigates whether a growth curve model could be an effective management tool. Using data on the number of audiencesaudience of the play “Why? π!” obtained from Serendipper Company, the applicability of a growth curve model using the Bass model is analyzed. The results of this study can be used as a basis to develop a more accurate demand forecasting model applicable to the theater industry.
A study on the impacts of social commerce on consumer buying behavior
정재권 ( Jea Kwon Chung ),주재우 ( Jae Woo Joo ) 한국경영공학회 2013 한국경영공학회지 Vol.18 No.2
There is growing attention that focuses on the social-commerce industry in South Korea. The social-commerce industry has grown significantly since its emergence in 2010, and has continued to be a fast-growing emerging market. Although social-commerce is a useful sales channel for sellers, such price-based sales promotion has a number of potential disadvantages for sellers, including: degradation of price, reduction in perceived value and change in the demand patterns of products and services. This study aims to demonstrate the impacts of social commerce on consumer purchasing behavior, especially their ‘strategic waiting’, a phenomenon which is caused by frequent price discounts. The results of this study offer a significant contribution to the literature on social commerce and pricing, and provide a better understanding of the potential negative impacts for sellers of using social-commerce companies as sales channels.
최대헌 ( Dae Heon Choi ),정재권 ( Jae Kwon Chung ),서철승 ( Cheol Seung Seo ) 한국경영공학회 2013 한국경영공학회지 Vol.18 No.3
Concerns surrounding the safety, freshness, quality, and wastage of perishable foods are growing, even though such foods are important to success in the food retail industry. Given the high sensitivity of these foods to temperature and the various food scandals that have surfaced recently, it has become imperative to manage perishable foods more efficiently. Prior studies have proposed advanced traceability and monitoring systems such as Radio Frequency Identification (RFID) and Time Temperature Integrator (TTI) as solutions to reduce such concerns. They have not, however, provided a comprehensive review and application of these technologies simultaneously. Because RFID and TTI can bring different advantages to the food retail industry, they should be used with different product categories to maximize the benefits from them. This study provides a better understanding of the potential advantages and applications of advanced perishable-food monitoring systems in the supply chain, based on a comprehensively review of prior studies and an interview with a food retail store in South Korea. Further, it provides valuable practical guidance for the implementation of such systems in the food retail sector.
크론병 환자에게 아자티오프린 치료 중 발생한 비경화성 문맥 고혈압 1예
박민규 ( Min-kyu Park ),이재광 ( Jae-kwang Lee ),김현수 ( Hyun-soo Kim ),정윤진 ( Yun-jin Chung ),박창근 ( Chang-keun Park ),정재권 ( Jae-kwon Jung ),김대진 ( Dae-jin Kim ) 대한내과학회 2020 대한내과학회지 Vol.95 No.2
Thiopurine-based drugs such as azathioprine and 6-MP are among the most common immunosuppressants used to treat inflammatory bowel disease, autoimmune hepatitis, various autoimmune diseases, and patients undergoing organ transplantation. The drugs are associated with various complications, of which one of the most serious is hepatotoxicity that may trigger non-cirrhotic portal hypertension. We report a case with this side-effect in a patient taking azathioprine to treat Crohn’s disease. (Korean J Med 2020;95:119-123)
기초과학연구의 특성을 반영한 성과평가지표 도출 및 중요도 분석 -AHP, 기술통계 및 가설검증의 교차분석을 중심으로-
구본철 ( Bon Chul Ku ),정경택 ( Kyung Tack Chung ),정재권 ( Jae Kwon Jung ),허대녕 ( Daen Young Heo ),박태규 ( Tae Kyu Park ) 한국경영공학회 2014 한국경영공학회지 Vol.19 No.2
The purpose of this study is to deduct performance evaluation index, considering the obvious contexts and the characteristics of basic science research. Not only has preceding research and interviews with scientists and engineers been carried out so as to perform those studies, but the deduction of the performance evaluation index, grouping and the performance on AHP analysis has been done, considering the features under the standard performance index which has been dealt with for the data with the result index by the national research development. Furthermore, through the statistical technique in surveys, the importance of the performance evaluation index on basic science study has been compared and analyzed. Cross analysis also has been conducted in setting up and verifying the hypothesis among respondents` cognitive differences between the basic science research and the result index as well. In our finding, the basic science research was determined into theoretical and experimental study under ‘the purpose of the new knowledgeable innovations as well as the improvement of understanding natural phenomenon and objects’, which are based on natural science. By supporting four major provisions and 28 results from the evaluation index, allowing for the characteristics of basic science research, this research presented an outline of the results in the basic science research more effectively. In addition, the priority of the performance evaluation index has been drawn by AHP and statistical technique of the academic achievement and the importance of the research circumstances. Moreover, in order to evaluate the performance outcomes in the basic science research, the performance assessments were not evaluated by the same level or by the weighted value number, but weighed by the priority following as the specific feature index under the research field more properly in scientific research.
불완전하게 절제된 진행성 대장 선종의 국소 재발과 위험 인자: 단일기관 후향 연구
오대명 ( Dae Myung Oh ),이재광 ( Jae Kwang Lee ),김현수 ( Hyunsoo Kim ),박창근 ( Chang Keun Park ),정재권 ( Jae Kwon Jung ),김대진 ( Dae Jin Kim ),정윤진 ( Yun Jin Chung ),김태훈 ( Tae Hoon Kim ),박명일 ( Myung Il Park ),박종필 ( 대한소화기학회 2017 대한소화기학회지 Vol.70 No.1
Background/Aims: Colonoscopy can detect precancerous lesions, which can subsequently be removed and reduce incidences of and mortality from colorectal cancer (CRC). However, recently published data have highlighted a significant rate of CRC in patients who previously underwent colonoscopy. Among many reasons, incomplete resection has been considered as a significant contributor. However, to date, there have only been a few studies regarding incompletely resected polyps, especially advanced colorectal adenoma (ACA). Hence, we aimed to evaluate the prognosis of incompletely resected ACA. Methods: We retrospectively reviewed the medical records of patients with ACA who had underwent endoscopic treatment with in-complete resection. The primary outcomes were (1) the incomplete resection rate of ACA, as determined by a histopathologic examina-tion and (2) the recurrence rate of incompletely resected ACA. We also investigated the probable contributing factors that may have led to a relapse of incompletely resected ACA. Results: A total of 7,105 patients had their colorectal polyps resected by endoscopic treatment, and 2,233 of these were considered as ACA. Of these, 354 polyps (15.8%) were resected incompletely, and only 163 patients were followed-up. Of those followed-up, 31 patients (19.0%) experienced local recurrence. The risk factors for recurrence after incomplete resection were evaluated; age, morphology of adenoma, and use of rescue therapy, such as argon plasma coagulation, were found to be associated with adenoma recurrence. Conclusions: Incompletely resected ACA in older patients or in patients with sessile-type adenomas should be monitored strictly, and if incomplete resection is suspected, rescue therapy must be considered. (Korean J Gastroenterol 2017;70:33-38)