스펙트럼 분석과 계절성 선형 모델을 이용한 Intra-Day 콜센터 통화량예측

신택수,김명석,Shin, Taek-Soo,Kim, Myung-Suk 한국통계학회 2011 응용통계연구 Vol.24 No.2

In this paper, a seasonal variable selection method using the spectral analysis accompanied with seasonal linear model is suggested. The suggested method is applied to the prediction of intra-day call arrivals at a large North American commercial bank call center and a signi cant intra-month seasonal variable I detected. This newly detected seasonal factor is included in the seasonal linear model and is compared with the seasonal linear models without this variable to see whether the new variable helps to improve the forecasting performance. The seasonal linear model with the new variable outperformed the models without it in one-day-ahead forecasting. 본 논문에서는 스펙트럼 분석과 계절성 선형 모델을 이용하여 intra,-day 콜센터 통화량 예측에 필요한 계절성 변수를 찾아내는 방법을 제시한다. 제시한 방법을 북미 지역의 어느 은행의 5분 단위 콜센터 통화량에 실증 적용하여 기존의 통계적 방법으로는 입증할 수 없었던 월 단위 계절성 변수가 유의함을 보인다. 새로이 찾아진 연수가 intra-day 콜센터 통화량 예측능력을 향상시키는지 확인하기 위해서 새로운 변수를 포함하는 계절성 선형 모델과 이 변수를 포함하지 않은 계절성 선형 모델의 익일 통화량 예측능력을 비교 평가한다. 평가결과 새로운 변수를 포함한 모델이 우수하다는 결과를 얻었다.

재활용 기반시설에서 발생하는 선별 잔재물의 자원화를 위한 도시생활폐기물과의 혼합소각 가능성 평가

신택수(Taek Soo Shin),성백남(Baek Nam Sung),연익준(Ik Jun Yeon),조병렬(Byung Yeol Cho),김광렬(Kwang Yul Kim) 大韓環境工學會 2011 대한환경공학회지 Vol.33 No.10

본 연구는 재활용 기반시설에서 발생하는 선별 잔재물을 자원화 하기 위해 가연성 생활폐기물과 혼합하여 도시폐기물소각로에서 소각 처리할 수 있는 가능성에 대해 고찰하였다. 선별 잔재물을 대상으로 성상과 조성, 삼성분, 발열량을 조사하여 가연성 생활폐기물의 경우와 비교·분석하였고, 도시생활폐기물 소각로에서 가연성 폐기물과 함께 혼합소각 함으로써 연소특성과 오염물질 배출특성 변화에 대해 실험하였다. 연구결과 재활용 기반시설 선별 잔재물이 가연성 생활폐기물에 비해 발열량 (5,865 kcal/kg)이 높고, 수분과 회분 함량은 적었다. 또한, 재활용 기반시설 선별 잔재물을 30%와 50% 혼합하여 연소시킬 경우, 가연성 생활폐기물만을 연소하는 경우와 비교할 때, 먼지(dust), SO₂, NO₂, CO 농도 변화는 크지 않았을 뿐만 아니라, 현행 배출허용기준을 만족하였다. 다만, 재활용 기반시설 선별 잔재물을 50% 혼합소각할 경우, HCl 농도(최고 33.7 ppm)가 배출허용기준을 초과하므로 30%까지 혼합하여 소각하는 것이 바람직하였다. The purpose of this study was to investigate the possibility of an alternative fuel resource by incinerating a mix of combustible MSW (municipal solid waste) and offals after separating recyclable material at the MRF (material recovery facilities) location. We analyzed the physical and chemical properties including the 3-contents, the calorific value, and chemical compositions of the separation rejects in MRF, and compared the results with combustible MSW. Moreover, we experimented the trend of combustible properties and the concentration change of air pollutants at mixed incineration in the MSW incinerator. According to the results of the experiment, the separation rejects showed higher heating value (5,865 kcal/kg), and lower moisture and ash content than combustible MSW. Since we have incinerated MSW in the MSW incinerator mixing the offals at 30% and 50% respectively, we know that the change of the concentration of dust, SO₂, NO₂, and CO did not appear significant, and not exceed the pollutants emission regulation. But, considering the enhancement of the HCl emission concentration (max. 33.7 ppm) at the co-incineration of the 50% offals, we believe that the proper mixing ratio of the separation rejects would become within 30%.

건강믿음모형(Health Belief Model)을 이용한 남성 흡연자의 금연에 대한 관심도를 규정하는 건강행동요인 분석

신택수(Taek-Soo Shin),조영채(Young-Chae Cho) 한국산학기술학회 2017 한국산학기술학회논문지 Vol.18 No.5

본 연구는 남성 흡연자들의 금연에 대한 관심도와 금연에 대한 관심도를 규정하는 요인 간의 관련성을 규명하고자 시도하였다. 조사대상은 D광역시청 및 그 산하 지청에 근무하고 있는 남성 공무원 중 조사시점에서 현재 흡연자인 593명으로 하였다. 조사방법은 2015년 10월에 구조화된 무기명 자기기입식 설문지를 이용한 설문조사에 의하였다. 연구결과, 조사대상자의 「금연에 대한 관심도」는 「금연에 대한 행동의 계기」, 「폐암에 대한 이환 가능성 인지」, 「폐암에 대한 심각성인지」 및 「금연에 대한 행동실천의 인지된 이익」과 유의한 양의 상관관계를 보였다. 공분산 구조분석 결과, 금연의 관심도를 규정하는 요인들의 「금연에 대한 관심도」를 높이는 요인으로는 「금연에 대한 행동실천의 인지된 이익 및 장애」가 가장 큰 요인이었으며, 다음으로 「폐암 이환 가능성 인지 및 심각성 인지」, 「금연에 대한 행동의 계기」 및 「사회적지지 네트워크」의 순이었다. 위와 같은 연구결과는 금연에 의한 암 예방효과와 흡연에 의한 건강장애의 심각성의 인식은 금연에 대한 관심을 높이는 요인이 되고 있음을 시사한다. 따라서 향후 남성 흡연자들의 금연지도에 있어서는 대상자의 금연의 관심도를 높이는 요인들을 정확하게 파악하여 끈기 있게 지도해 나가는 것이 중요하다고 생각된다. This study examined the relationship between the interest in smoking cessation and factors that define the interest in smoking cessation. The study subjects were 593 male civil servants who worked at D metropolitan city, and were smokers at the time of the survey. The research method was a survey using a self-administered questionnaire in October 2015. As a result, the interest in smoking cessation showed a positive correlation with the cues to action for smoking cessation, recognition of susceptibility for lung cancer, recognition of the seriousness for lung cancer, and benefits to the practice of action on smoking cessation. With the analysis of the covariance structure, the benefits and barriers to the practice of action on smoking cessation were the largest factors increasing the interest of smoking cessation, followed by the order of recognition of susceptibility and seriousness for lung cancer, cues to action for smoking cessation, and social support network. These results suggest that the cancer prevention effect due to smoking and the awareness of the seriousness of the health problems caused by smoking were the factors increasing interest in smoking cessation. Therefore, it is very important that education on quitting smoking for male smokers be continued to better understand the factors leading to an increase in smoking.

모바일 위치기반 SNS의 특성과 지각된 프라이버시 위험이 SoLoMo 어플리케이션의 이용의도에 미치는 영향

신택수(Taek soo Shin),조원상(Won Sang Cho) 한국IT서비스학회 2014 한국IT서비스학회지 Vol.13 No.4

In recent years, the social network service (SNS) and the location-based social network service (LBSNS) industry is expanding and the competition within the field is increasing much more. Since 2010, the full-scaled studies of SNS and LBSNS have begun. With the growth of SNS and LBSNS markets, SoLoMo (Social-Local-Mobile) is also becoming the trend for applications in different fields. However, despite the importance of SoLoMo, there have been little studies on the characteristics of SoLoMo applications. The purpose of this research is to investigate the effect of characteristics and perceived privacy risk of mobile location-based SNS on intention to use SoLoMo applications. For the purpose, we proposed a SoLoMo service acceptance model with TAM (Technology Acceptance Model) and the characteristics of SoLoMo applications. The characteristics consist of three factors, i.e. SNS, location, and mobile-related factors. This study also considered a gamification and a perceived privacy risk factor influencing on SoLoMo service usage in our proposed research model. The results of our empirical analysis using partial least squares (PLS) method show that the characteristics of SoLoMo applications including SNS, location, and mobile-related features, gamification, and perceived privacy risk have partially an effect on intention to use SoLoMo applications. Based on these results, SoLoMo-related companies will be able to increase the usage of SoLoMo services by differentiating their own strategies with these factors influencing on SoLoMo services.

인공신경망과 로짓모형을 통합한 부실확률맵기반 신용등급화에 관한 연구

신택수 ( Taek Soo Shin ),홍태호 ( Tae Ho Hong ) 한국회계학회 2004 회계저널 Vol.13 No.3

제조기업 실행공동체의 사회적 자본이 조직의 지식공유특성 및 개인혁신활동에 미치는 영향

신택수 ( Shin Taek-soo ),이준용 ( Lee Jun-yong ) 한국정보시스템학회 2017 情報시스템硏究 Vol.26 No.3

Purpose The purpose of this research is to investigate the effect of social capitals on organizational knowledge sharing characteristics and individual innovation activities in community of practice (CoP) of manufacturing company. Design/methodology/approach For this purpose, we divide social capitals as three dimensions, i.e. structural, relational, and cognitive dimension. Structural dimension also consists of closure and Brokerage. Relational social capital is defined as trust about colleagues, superior authorities, and organization. Then, cognitive social capital is defined as a shared understanding among individuals, such as a shared language and codes within CoP. Knowledge Sharing is defined as quantity and quality of shared knowledge. We also defines the cause and effect relationships among social capitals, organizational knowledge sharing characteristics, and individual innovation activities in CoP of manufacturing company as follows. The social capitals will have positive effects on quality of shared knowledge. Then the quality of shared knowledge will have positive effects on the individual innovation activities. This paper tested the validity of these hypothesized casual effects and the sub-hypothesized causal relationships. For the purpose, we used the Partial Least Squares (PLS) for analyzing the causal relationships. Findings Our empirical results show that social capitals of CoP mostly have effects on organizational knowledge sharing characteristics (quantity and quality of shared knowledge) and knowledge sharing activities also have effects on individual innovative activities in the workplace. In this study, these result have a significant implication that a private company will be able to gain organizational innovative performance much better by strengthening CoP supporting activities.

남성 흡연자의 금연에 대한 관심도 및 관련 요인

신택수(Taek-Soo Shin),임영아(Young-A Lim),조영채(Young-Chae Cho) 한국산학기술학회 2018 한국산학기술학회논문지 Vol.19 No.4

본 연구는 남성 흡연자들의 금연에 대한 관심도와 그에 관련된 요인을 규명하고자 시도하였다. 조사대상은 D광역시청에 근무하고 있는 남성 공무원 중 조사시점에서 현재 흡연자인 593명으로 하였다. 조사는 2015년 10월에 구조화된 무기명 자기기입식 설문조사에 의하였다. 연구결과, 조사대상자의 금연에 대한 관심도는 「관심 없음」 28.3%, 「관심이 있으나 6개월 이내에 금연할 생각 없음」 45.7%, 「관심이 있으며 6개월 이내에 금연할 것임」 26.0%로 나타났다. 다중회귀분석 결과, 조사대상자의 금연에 대한 관심도에 영향을 미치는 요인으로는 「고용형태」, 「최초 흡연 연령」, 「1일 흡연량(담배 개피 수)」, 「아침에 일어나서 첫 번째 담배를 피울 때까지 걸리는 시간」, 「폐암 이환 가능성 인지」, 「금연에 대한 행동실천의 인지된 이익」이 유의한 변수로 선정되었다. 로지스틱 회귀분석 결과, 금연에 대한 관심도가 「관심 없음」군보다 「관심이 있으며 6개월 이내에 금연할 것임」군에서 「폐암 이환 가능성 인지」, 「금연에 대한 행동실천의 인지된 이익」 및 「금연에 대한 행동실천의 인지된 장애」가 높게 나타날 위험비가 유의하게 상승하는 것으로 나타났다. 위와 같은 연구결과는 흡연에 의한 건강장애의 심각성의 인식이 금연에 대한 관심을 높이는 주요 요인이 되고 있음을 시사한다. This study was conducted to investigate the relationship between interest in smoking cessation and factors that define this interest. The study subjects were 593 male civil servants who work at D metropolitan city and were smokers at the time of the survey. The research method was a survey using a self-administered questionnaire in October 2015. Interest in smoking cessation of study subjects showed that 28.3% had no interest in smoking cessation, 45.7% were interested in smoking cessation, but had no intention to quit within six months, and 26.0% were interested in smoking cessation and intended to quit within six months. Multiple regression analysis revealed that the factors influencing interest in smoking cessation with explanatory powers of 23.6% were employment type, age when first starting smoking, number of cigarettes smoked per day, time from when you wake up until you smoke your first cigarette, recognition of susceptibility to lung cancer, and benefits to smoking cessation. Logistic regression analysis revealed that the odds ratio of recognition of susceptibility for lung cancer, benefits to smoking cessation, and barriers to smoking cessation were significantly increased in the group with interest in smoking cessation and intention to quit within six months vs. the group with no interest in smoking cessation. Taken together, these results suggest that cancer prevention due to smoking and awareness of the seriousness of health problems caused by smoking were factors increasing interest in smoking cessation.

의무기록사의 직업전문성 인식도와 직무만족도 수준 및 관련요인

신택수(Shin, Taek-Soo),조영채(Cho, Young-Chae) 한국산학기술학회 2014 한국산학기술학회논문지 Vol.15 No.7

본 연구는 병원에 근무하고 있는 의무기록사들의 직업전문성 인식도와 직무만족도에 영향을 미치는 요인을 알아보 고자 서울시, 경기도, 대전시, 충청남도 및 충청북도에 소재하고 있는 53개 병원급 이상에서 근무하고 있는 의무기록사 314 명을 대상으로 2013년 3월 4일부터 4월 23일까지의 기간 동안에 표준화된 자기기입식 설문지(self-administered questionnaire)를 이용한 설문조사를 실시하였다. 연구결과, 조사대상자들의 직업전문성인식도에는 성별, 연령, 결혼상태, 월 수입, BMI, 직위, 업무에 대한 적성, 직업전환의사 및 장래 의무기록사에 대한 사회적 지위 전망에 대한 인식이 유의한 관련 성이 있는 것으로 나타났으며, 특히 인구사회학적 특성과 직업관련 특성이 직업전문성인식도와 높은 관련성이 있었다. 조사 대상자들의 직무만족에는 연령, 월수입, BMI, 직위, 업무에 대한 만족도, 직업전환의사, 응답자 자신의 사회적 지위 전망에 대한 인식 및 직업전문성인식도가 유의한 관련성이 있는 것으로 나타났으며, 특히 직업관련 특성 변수와 직업전문성인식도 가 직무만족도와 높은 관련성이 있는 것으로 나타났다. 위와 같은 연구결과는 의무기록사들의 직업전문성인식도에는 인구 사회학적 특성 및 직업관련 특성 변수들이 높은 관련성을 보였으며, 직무만족도에는 직업관련 특성 및 직업전문성인식도 변수들이 높은 관련성이 있음을 시사하고 있다. This study was conducted to determine the factors affecting the professional job perception and job satisfaction of medical recorders working at general hospitals. The study subjects were 314 medical recorders and health information technicians working at 42 general hospitals. The investigation was conducted using a standardized self-administered questionnaire during March 4-April 23, 2013. As a result, there was a significant correlation among gender, age, marital status, monthly salary, BMI, position, aptitude for one’s duties, wish for a career transition, and perception of the prospects of the social status of medical recorders and health information technicians in the future and professional job perception. In particular, the demographic characteristics and work-related characteristics suggested a high correlation with the professional job perception. There was a significant correlation between age, monthly salary, BMI, position, work satisfaction, wish for a career transition, perception of the prospects of the respondent’s social status, and professional job perception and work satisfaction. In particular, the work-related characteristic variables and professional job perception indicate a high correlation with the work satisfaction. The results indicated a high correlation between the demographic characteristics and job-related characteristics variables in terms of the professional job perception of medical recorders and health information technicians and between the work-related characteristics and professional job perception variables in terms of work satisfaction.

중국현지기업의 사회자본이 지적자본과 기업의 혁신활동에 미치는 영향

신택수 ( Taek Soo Shin ),최종군 ( Zhong Jun Cui ) 한국지식경영학회 2014 지식경영연구 Vol.15 No.3

The social capital of an organization is recognized as the origin of the knowledge capital creation, and it becomes the mechanisms which explain the interaction of members or which accelerate the behavior of the members to attain the goal of an organization (Park, 2001; Jang et al., 2011). Lots of researches show that this causal relationship empirically exists. Social capital and knowledge capital of an organization are one of the most important competitive advantages that a company needs. They are also the main dynamic drivers of the innovation activity. This study analyzes the relationship and examines the impact and role of an organization’s social capital on intellectual capital and innovation activities in an organization. In other words, the main purpose of this study is to analyze the impact of social capital on the intellectual capital and innovation activities of, in particular, China local companies. This study empirically analyzed the survey data collected from the employees of the companies located in China. Our empirical results of this study showed that social capital has significantly causal effects on intellectual capital partially and also showed the intellectual capital has significantly positive effects on the innovation activities partially.

유전자 탐색기법을 활용한 기업신용평점모형의 지식 정제방법

신택수(Taek Soo Shin),한인구(In Goo Han) 한국경영학회 2002 經營學硏究 Vol.31 No.6

Credit rating for commercial loans is an important task for loan officers of a bank who usually use a credit-rating teble(CRT) based on a point system. However, the loan decision making using such a table has its limitations as follows. First, CRT needs a few critical judgments for commercial loans. For example, the judgments consist of knowledge.acwuisition on the criteria such as variable selection, weights between variables. cut-offs between intercals within each variable, and relative value at each interval of the variables for caredit rating. The first level criteria such as quantitative and qualitative variables need to be expressed on interval scales to assess a credit score for each variable. However, the variables present a problem in terms of measutability. This problem renders it impractical to directly applly theretical or human expertise-based choice strategies to unstructured choice problems. The objective of this study is to presesnt an optimal knowledge acquisition and refinement method of the CRT using genetic algorithms(GAs). In our proposed model, the GAs search the optimal criteria for the CRT applied to credit rating process. For the purpose, the CRT and the GAs are integrated to extract and refine the knowledge of multi-criteria for the CRT. The obtained knowledge supports to find optimal parameters of the CRT for loan officers` decision making. Our experimental results show that the knowledge acquisition and refinement method using the GAs are effective for the CRT as a multi-attribute decision problem.