SemStim at the LOD-RecSys 2014 Challenge
SemStim is a graph-based recommendation algorithm which is based on Spreading Activation and adds targeted activation and duration constraints. SemStim is not affected by data sparsity, the cold-start problem or data quality issues beyond the linking of items to DBpedia. The overall results show that the performance of SemStim for the diversity task of the challenge is comparable to the other participants, as it took 3rd place out of 12 participants with 0.0413 F1@20 and 0.476 ILD@20. In addition, as SemStim has been designed for the requirements of cross-domain recommendations with different target and source domains, this shows that SemStim can also provide competitive single-domain recommendations.
KeywordsUser Profile Target Domain Activation Threshold Spreading Activation Source Domain
This publication has emanated from research supported in part by a research grant from Science Foundation Ireland (SFI) under Grant Number SFI/12/RC/2289.
- 1.Schein, A.I., Popescul, A.H.L., Popescul, R., Ungar, L.H., Pennock, D.M.: Methods and metrics for cold-start recommendations. In: Conference on Research and Development in Information Retrieval, pp .253–260. ACM Press (2002)Google Scholar
- 2.Fernández-Tobías, I., Cantador, I., Kaminskas, M., Ricci, F.: Cross-domain recommender systems: a survey of the state of the art. In: Spanish Conference on Information Retrieval (2012)Google Scholar
- 4.Berthold, M., Brandes, U., Kötter, T., Mader, M., Nagel, U., Thiel, K.: Pure spreading activation is pointless. In: Conference on Information and Knowledge Management (2009)Google Scholar