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Development of Scoring Model on Customer Attrition Probability by Using Data Mining Techniques
Han, Sang-Tae,Lee, Seong-Keon,Kang, Hyun-Cheol,Ryu, Dong-Kyun The Korean Statistical Society 2002 Communications for statistical applications and me Vol.9 No.1
Recently, many companies have applied data mining techniques to promote competitive power in the field of their business market. In this study, we address how data mining, that is a technique to enable to discover knowledge from a deluge of data, Is used in an executed project in order to support decision making of an enterprise. Also, we develope scoring model on customer attrition probability for automobile-insurance company using data mining techniques. The development of scoring model in domestic insurance is given as an example concretely.
Nonparametric Estimation using Regression Quantiles in a Regression Model
Han, Sang-Moon,Jung, Byoung-Cheol 한국통계학회 2012 응용통계연구 Vol.25 No.5
One proposal is made to construct a nonparametric estimator of slope parameters in a regression model under symmetric error distributions. This estimator is based on the use of the idea of minimizing approximate variance of a proposed estimator using regression quantiles. This nonparametric estimator and some other L-estimators are studied and compared with well known M-estimators through a simulation study.
Han, Ji-Kyoung,Sung, Su-Chang,Jo, Min-Ji,Lee, Seung-Cheol 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.3
Subcritical water (SCW) extract of blue mussel was prepared at 100, 200, and $300^{\circ}C$ for 10, 30, and 60 min, respectively, and its effect on the activity of 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical, angiotensin-converting enzyme (ACE), and acetylcholinesterase (AChE) was evaluated. We found that DPPH radical scavenging, ACE inhibitory, and AChE inhibitory activities significantly increased with increasing extraction temperature and duration. For example, AChE inhibitory activity of the extract at $300^{\circ}C$ for 60 min increased to $63.1{\pm}0.3%$, while that at $100^{\circ}C$ for 10 min was $5.6{\pm}0.3%$. The results suggested that SCW extraction is attractive processing methods for obtaining high valued extract from blue mussel.