@article{ART003009740},
author={Soojung Lee},
title={Jaccard Index Reflecting Time-Context for User-based Collaborative Filtering},
journal={Journal of The Korea Society of Computer and Information},
issn={1598-849X},
year={2023},
volume={28},
number={10},
pages={163-170},
doi={10.9708/jksci.2023.28.10.163}
TY - JOUR
AU - Soojung Lee
TI - Jaccard Index Reflecting Time-Context for User-based Collaborative Filtering
JO - Journal of The Korea Society of Computer and Information
PY - 2023
VL - 28
IS - 10
PB - The Korean Society Of Computer And Information
SP - 163
EP - 170
SN - 1598-849X
AB - The user-based collaborative filtering technique, one of the implementation methods of the recommendation system, recommends the preferred items of neighboring users based on the calculations of neighboring users with similar rating histories. However, it fundamentally has a data scarcity problem in which the quality of recommendations is significantly reduced when there is little common rating history. To solve this problem, many existing studies have proposed various methods of combining Jaccard index with a similarity measure. In this study, we introduce a time-aware concept to Jaccard index and propose a method of weighting common items with different weights depending on the rating time. As a result of conducting experiments using various performance metrics and time intervals, it is confirmed that the proposed method showed the best performance compared to the original Jaccard index at most metrics, and that the optimal time interval differs depending on the type of performance metric.
KW - Jaccard Index;Data Sparsity Problem;Similarity Measure;Collaborative Filtering;Time-aware Recommender System
DO - 10.9708/jksci.2023.28.10.163
ER -
Soojung Lee. (2023). Jaccard Index Reflecting Time-Context for User-based Collaborative Filtering. Journal of The Korea Society of Computer and Information, 28(10), 163-170.
Soojung Lee. 2023, "Jaccard Index Reflecting Time-Context for User-based Collaborative Filtering", Journal of The Korea Society of Computer and Information, vol.28, no.10 pp.163-170. Available from: doi:10.9708/jksci.2023.28.10.163
Soojung Lee "Jaccard Index Reflecting Time-Context for User-based Collaborative Filtering" Journal of The Korea Society of Computer and Information 28.10 pp.163-170 (2023) : 163.
Soojung Lee. Jaccard Index Reflecting Time-Context for User-based Collaborative Filtering. 2023; 28(10), 163-170. Available from: doi:10.9708/jksci.2023.28.10.163
Soojung Lee. "Jaccard Index Reflecting Time-Context for User-based Collaborative Filtering" Journal of The Korea Society of Computer and Information 28, no.10 (2023) : 163-170.doi: 10.9708/jksci.2023.28.10.163
Soojung Lee. Jaccard Index Reflecting Time-Context for User-based Collaborative Filtering. Journal of The Korea Society of Computer and Information, 28(10), 163-170. doi: 10.9708/jksci.2023.28.10.163
Soojung Lee. Jaccard Index Reflecting Time-Context for User-based Collaborative Filtering. Journal of The Korea Society of Computer and Information. 2023; 28(10) 163-170. doi: 10.9708/jksci.2023.28.10.163
Soojung Lee. Jaccard Index Reflecting Time-Context for User-based Collaborative Filtering. 2023; 28(10), 163-170. Available from: doi:10.9708/jksci.2023.28.10.163
Soojung Lee. "Jaccard Index Reflecting Time-Context for User-based Collaborative Filtering" Journal of The Korea Society of Computer and Information 28, no.10 (2023) : 163-170.doi: 10.9708/jksci.2023.28.10.163