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A content based seller recommendation system in an open market
Seungsup Lee,Yongmoo Suh 한국경영정보학회 2010 한국경영정보학회 학술대회논문집 Vol.2010 No.1
More and more customers are buying products on on-line stores and they will be able to make a decision to buy with ease, if they are given reliable information of sellers. But unfortunately, such information is not available and very limited at best. Thus, this paper proposes a recommendation system which recommends most dependable sellers to the customers who want to buy a product. The system first evaluates the sellers registered on an online store by classifying them either as good or as bad using a decision tree technique (J48), and selects only good sellers. Then, the system makes use of the content-based filtering method to find best-matching top-K sellers among the selected good sellers by comparing the individual seller profile and the customer profile. This study makes a contribution in that to our knowledge, it is the first attempt to recommend sellers to customers, not products as is done in other studies.
Photo-configurable embossed liquid crystal alignment layer with high azimuthal anchoring strength.
Ahn, Dowon,Jeong, Yong-Cheol,Han, Manhee,Cho, Kuk Young,Lee, Seungsup,Park, Jung-Ki Optical Society of America 2012 Optics express Vol.20 No.6
<P>Herein we describe a photo-alignment layer of improved azimuthal anchoring energy comparable to conventional rubbing method. In order to address the inherent low anchoring stability of photo-alignment layer, we applied embossing technique to conventional photosensitive polymer film, based on the cinnamoyl photoreactive groups, to introduce physical micro-groove effect for additional anchoring energy. From this, 2.5 10?4 J/m2 of azimuthal anchoring energy was achieved, which is considered as synergistic effect from both photoinduced chemical interaction and physical microgroove alignment. In this study, we conducted systematic study on change in anchoring energy as a function of both aspect ratio of embossed pattern and UV exposure dose. We also demonstrated fabrication of sophisticated multi-domain structure of LC cells and discussed theoretical interpretation through LC simulation.</P>