TRFM 모형을 이용한 패션기업의 고객세분화

동상옥,김규곤,조성기 한국자료분석학회 2008 Journal of the Korean Data Analysis Society Vol.10 No.6

In this study, we consider the techniques of customer segmentation for customer relationship management and estimates the survival rate of next year through customer value ratings based on TRFM result. In order to formulate suitable model for estimating the survival rate, we propose TRFM model through application of RFM model, and also predict the relationship of sales of customer from the evaluation of proposed model. And, each factors for individual customer's yield is investigated and the selective customer relationship and differential strategy is established. And also, TRFM score and customer's yield are used to evaluate and classify the customer, then it is provided with the helpful method for marketing in future. 본 연구는 패션기업의 고객관계관리 전략수립에 기초가 되는 고객세분화 기법을 다루고 있다. 본 연구에서는 고객세분화를 위하여 RFM 모형을 응용한 TRFM 모형을 설정하고, 고객가치 등급화를 통하여 차기년도의 생존율을 예측하기 위한 적합한 모형을 제안하며 모형의 평가와 모형을 이용한 고객매출의 관계를 제시하고 있다. 또한 모형의 요인들에 대한 개별고객의 수익률을 산출하여 선별적인 고객관리와 차별화된 전략을 수립한다. 그리고 제안한 TRFM 모형의 스코어와 고객의 수익률을 이용하여, 고객의 평가 및 분류를 통하여 보다 적합한 마케팅을 위한 기초자료를 제공하고자 한다.

구조방정식모형을 이용한 베트남 의료전문가의 보완대체의학 인식 만족과 태도의 관계

동상옥,유종향 한국자료분석학회 2013 Journal of the Korean Data Analysis Society Vol.15 No.4

보완대체의학(CAM)에 대한 관심은 점차 증가하고 있으며 의사, 간호사, 일반인 등 누구나 접하고 이용하고 있는 추세이다. 따라서 의료 전문가들이 CAM 사용에 대해 환자에게 올바른 정보를 제공하기 위해서는 CAM에 대한 지식과 긍정적인 인식 제고가 필요하다. 본 연구에서는 베트남 의료 전문가들의 CAM에 대한 인식 만족과 태도와의 관계에 대하여 구조방정식모형을 통하여 살펴보았다. 이를 위해 확인적 요인분석을 통하여 3가지의 인식 요인과 태도 요인을 설정하였으며, 척도에 대한 신뢰도 및 타당도를 확보하였다. 구조모형의 적합도 검정을 통해 모형의 적합도가 만족하였다. CAM에 대한 만족도는 태도에 영향을 미치는 것으로 나타났으며, CAM 분야 중 인지도가 낮은 분야에 대한 지식 습득 및 교육이 바탕이 된다면 만족도는 더 높아지고, CAM에 대한 태도에 더 긍정적인 영향을 미치는 것으로 나타났다. The interest about Complementary and Alternative Medicine (CAM) is gradually increasing. These days, CAM is common between doctors, nurses and general public. Therefore, knowledge and positive view of CAM is necessary in order to offer appropriate information for specialists to each patient. In this study, the relationship between cognition satisfaction and attitudes of vietnam medical experts for CAM examined through structural equation model. Three cognition factor and attitude factor were set up through confirmatory factor analysis, and reliability and validity of the scales were obtained. The goodness of fit of structural equation model were satisfactory. The result shows that attitude is influenced by satisfaction of CAM. If providing the knowledge and education about CAM then the satisfaction of CAM could offer improving positive effect on CAM.

A Study on the Structural Equation Modeling using the Nearest Neighbor Variance Estimation

동상옥,강창완,김규곤 한국자료분석학회 2012 Journal of the Korean Data Analysis Society Vol.14 No.4

The strength of nearest neighbor variance estimation (NNVE) is its robustness against a large proportion of noise points and against deviation from normality of the signal. Consistent results with this method have been established. Under some reasonable assumptions, it has been shown that the covariance estimate is bounded and that each point has only bounded influence on the final estimates. NNVE outperformed the popular minimum volume ellipsoid (MVE) estimator in simulation studies, with a big improvement when the proportion of outliers was very large. In this study, outlier data is applied to the robust covariance. In the result, for outlier data, the strong performance of NNVE is demonstrated. Thus, we propose the robust SEM by using the NNVE method in the case of existing outliers.

다분상관계수를 이용한 한의학에서의 성격 척도의 요인분석

동상옥,이시우 한국자료분석학회 2013 Journal of the Korean Data Analysis Society Vol.15 No.1

Typically, factor analysis uses the Pearson correlation coefficient. But, factor analysis has problems that think of order and categorical as interval variable and should assume normality. Personality questionnaire 1 developed by the Korea Institute of Oriental Medicine can have these problems. Therefore, in this study, factor analysis was conducted using the polychoric correlation coefficient and tested the validity of personality questionnaire 1. In addition, method using the polychoric correlation coefficient and method using Pearson correlation coefficient were compared. Results of the exploratory factor analysis, the number of questions and the items were different. However, both methods, four factors were extracted. Exploratory factor analysis using polychoric correlation coefficient explained 7.653% higher explanatory power than method using Pearson correlation coefficient. 일반적으로 흔히 사용하는 Pearson 상관계수를 이용한 요인분석은 순서형(ordinal), 범주형(categorical) 등의 자료들을 연속형(interval) 변수로 판단하거나 정규성을 만족해야 하는 등의 문제점이 있다. 한국한의학연구원에서 개발한 성격설문1은 이러한 문제점을 가지고 있다고 할 수 있다. 따라서, 본 연구에서는 다분(polychoric) 상관계수를 이용한 요인분석을 실시하여 성격설문1의 타당도를 검증하고, Pearson 상관계수를 이용한 요인분석과의 비교를 실시하였다. 탐색적 요인분석 결과 문항수와 항목은 달랐지만 두 방법 모두 4개의 요인으로 추출되었다. 하지만 다분상관계수를 이용한 탐색적 요인분석이 변량의 설명력을 7.653% 더 높게 설명하였다.

성격유형과 삶의 질 연관성에 대한 남녀의 교차타당성 검증

동상옥,장은수 한국자료분석학회 2013 Journal of the Korean Data Analysis Society Vol.15 No.1

This study established structural relation between personality type and the quality of life and examined personality type had an effect on the quality of life. Personality questionnaires are composed of 15 questions and 10 questions were satisfied with the reliability. Quality of life measure was used the SF-12 and 7 questions were satisfied with the reliability. This study was performed cross-validation verification depending on gender and multi-group structural model analysis for difference of path coefficient. As a result, the structural relationships of personality types that affect the quality of life had could be applied equally between male and female. Personality factors of behavior and emotionality gave plus impact of the physical and mental health index in male and personality factors of cognition gave plus impact of the physical and mental health index in female. 본 연구는 남성과 여성 사이에 성격유형과 삶의 질 척도간의 구조적 관계를 설정하고 영향력이 있는지를 알아보고자 하였다. 성격설문1은 15개의 문항으로 구성되어 있으며, 신뢰도를 만족하는 10개의 문항이 추출되었고, 삶의 질 척도는 SF-12를 이용하였으며, 신뢰도를 만족하는 7개의 문항이 추출되었다. 남성과 여성 사이에 성격유형과 삶의 질 척도간의 관계가 동일한지를 알아보기 위하여 교차타당성 검증을 실시하였으며, 집단 간 경로계수의 차이를 알아보기 위하여 다중집단 구조모형 분석을 실시하였다. 그 결과, 남성과 여성 사이의 성격유형이 삶의 질 척도에 영향을 주는 구조적 관계가 동일하게 적용가능 하였다. 남성은 행동(behavior), 정서(emotionality) 성격요인이 신체적(physical), 정신적(mental) 건강지수에 양(+)의 영향, 여성은 인지(cognition) 성격요인이 신체적(physical), 정신적(mental) 건강지수에 양(+)의 영향을 주는 것으로 남성과 여성 사이에 차이를 보여주었다.

Comparative Study on Software for Analysing Non-normal Data in Structural Equation Modeling

동상옥,강창완,김규곤 한국자료분석학회 2012 Journal of the Korean Data Analysis Society Vol.14 No.3

Structural equation modeling (SEM) techniques are considered today to be one of the major components of applied multivariate statistical analyses and are used by biologists, economists, educational researchers, marketing researchers, medical researchers, and a variety of other social and behavioral scientists. In addition, many softwares have been developed for SEM and, over time, have grown steadily. However, a great obstacle for its wider use has been its difficulty in handling non-normal variables within the framework of generalized linear models. In this study, we introduce the five softwares for SEM with non-normal variables and compare them through some simulations. In the comparison results, most of the softwares analyzed by recognizing binary data in the continuous data. However, some softwares were found to use a special covariance matrix to analyze data. For continuous data, we recommend Mplus's WLS and R's WLS, and for categorical data, we recommend LISREL's WLS using the tetrachoric correlation and R's WLS using the ploycor package.

사상체질별 체질량지수, 나이, 성별과 삶의 질에 대한 상관성 연구

이재철,동상옥,박수정,주종천,이수경 한국한의학연구원 2012 한국한의학연구원논문집 Vol.18 No.3

Objectives : This work aimed to reveal the relations between Health-related Quality of Life and Body mass index, age, gender in Sasang Constitution. Methods : 1108 subjects who visited Korean medicine hospital in Jeonju for regular health examination surveyed SF-12. Their Sasang constitution were diagnosed by 1 Sasang constitution medicine specialist. ANOVA (Analysis of variance) was carried out to compare SF-12 sub scales differences among each constitutions. Regression analysis was performed to reveal effects in changes of BMI, age, and gender to SF-12 sub scales. Results : TE type gets more BMI, has more physical limits, even those of SE and SY type are not limited by these reasons. Contrary, SE type feels more vitality when they get higher BMI. SE type women have low mental health status than that of SE type men, though they don’t have any specific disease. Conclusions : This is the first work of analysis between quality of life and Sasang Constitution’s BMI, age, and gender. To reveal factors which affect quality of life in each Sasang constitutions, more rigorous works are required.

중의 변증 설문도구의 신뢰도 및 타당도 고찰 -China National Knowledge Infrastructure를 이용하여-

여민경,동상옥,이영섭,장은수 한의병리학회 2015 동의생리병리학회지 Vol.29 No.3

The purpose of this study is to investigate the reliability and validity of the questionnaire of pattern identification (PI) in traditional chinese medicine (TCM), through the systematic review of china national knowledge infrastructure (CNKI) database. We searched the articles related with reliability and validity of the questionnaire of PI and published from January 1994 to December 2013. Seventeen questionnaires were analyzed in this study. The twelve (70.6%) questionnaires were developed on the base of specific disease, and five (29.4%) ones were developed on the base of non-specific disease. Three of PI questionnaires showed low inter-item consistency reliability. Exploratory factor analysis of construct validity, content validity, and criterion validity analysis were commonly used on the assessment of validity, but none of them was analysed at the same study. There was only one questionnaire of the ischemic stroke that examined the sensitivity and specificity of both training and test groups in spite of the absence of a gold standard.

대학(원)생 졸업 직후 취업성공의 배경

이윤성,동상옥,강창완,김규곤,정윤아 한국자료분석학회 2010 Journal of the Korean Data Analysis Society Vol.12 No.3

1990년대 후반 금융위기로 인한 경기침체로 많은 기업들이 지속적인 구조조정을 하는 것과 동시에 청년실업 문제가 사회적 핵심 과제로 끊임없이 제기되어 왔다. 하지만 청년들에게는 해마다 취업이 더 어려워지고 공부의 형태가 전공의 지식을 쌓기보다는 기업의 스펙에 맞추어가고 있는 실정이다. 본 연구는 한국고용정보원에서 2007년부터 시작된 청년패널2007(YP2007) 2차 년도 자료를 가지고 2007년도 유형에서 대학생, 대학원생이었던 응답자가 2008년도 유형에는 취업자 또는 미취업자로 변화된 응답자들을 대상으로 취업자와 미취업자간의 차이를 파악하고 졸업직후 취업성공의 배경이 무엇인지 알아보고자 한다. 그 결과를 토대로 청년층 구직자들의 구직준비와 취업성공을 위한 시사점을 제공하고자 한다. SAS ver 9.1 Enterprise Miner를 통하여 의사결정나무 분석을 실시한 결과 희망연봉과 총 구직 시도 횟수, 경제적 지원여부가 취업성공의 배경으로 나타났다. Many companies have met the circumstance that was restructuring due to economic slump by financial crisis and at the same time youth unemployment has surged constantly as a major social problem since the end of 1990. However, it is getting hard to get a job for young people each year, and duty of study is getting meet the requirements of company rather than storing up own's major acknowledge. In this study, I'd like to try to find differences and analyze main background to get a successful job after graduation between the worker and the unemployed at 2008 who were college and graduate students at 2007 with second year's data of youth panel 2007(YP2007) made by Korea Employment Information Service. The purpose is to provide implications which young job seekers look and apply for a job with the result. Decision tree method was used. As a result of decision tree analysis through SAS ver 9.1 Enterprise Miner, backgrounds of employment success were hope annual income, total count of look for job, economical support.

Recognition of and interventions for Mibyeong (subhealth) in South Korea: a national web-based survey of Korean medicine practitioners

이재철,동상옥,이영섭,김상혁,이시우 한국한의학연구원 2014 Integrative Medicine Research Vol.3 No.2

Background: Medically unexplained symptoms (MUSs) are common in primary care. Atpresent, there are no proven, comprehensive treatments available in primary care forpatients with MUSs. However, MUS has parallels with “subhealth” or Mibyeong from tradi-tional East-Asian medicine, and thus, Mibyeong interventions could be effective in treatingMUS. Unfortunately, studies on Mibyeong and its intervention methods are relatively rare.Methods: We administered a web-based survey to 17,279 Korean medicine (KM) practitionersregistered with the Association of Korean Medicine. The response rate was 4.9% (n = 849).Based on the responses received, we assessed how much they agreed with concepts relatedto Mibyeong on a 7-point scale from “do not agree” to “strongly agree.” Respondents werealso asked to indicate how frequently they encountered various subtypes and patterns ofMibyeong, and how frequently they use listed intervention methods.Results: Data from 818 respondents were analyzed after excluding those with no clinicalexperience. On average, respondents were male general practitioners aged between 30 yearsand 49 years, working or living in metropolitan areas such as Seoul, Incheon, and Gyeonggi-do. Responses did not differ by demographics. Respondents generally thought that Mibyeongreferred to subjective or borderline findings without certain disease, and that Mibyeong hasvarious subtypes and patterns. Subtypes included fatigue, pain, and digestion problems; pat-terns were either deficiencies (e.g., qi, blood, and yin deficiency) or stagnations (e.g., liver qidepression and qi stagnation). Decoction was the most frequently used type of interventionfor Mibyeong of all items listed, followed by acupuncture and moxibustion. Patient educa-tion was also recommended, suggesting healthy eating, promoting healthy environment,and exercise.Conclusion: We were able to provide preliminary results on KM practitioners’ recognition ofand interventions for Mibyeong, but further research is needed to develop a detailed defi-nition of Mibyeong and its myriad subtypes and patterns, and evaluations of the efficacy ofMibyeong interventions.