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Paper Abstract and Keywords
Presentation 2025-07-31 15:05
Selecting Subgraphs for Bridging Interest Nodes Based on Random Walks
Kazuma Okada, Tsuyoshi Yamashita, Kunitake Kaneko (Keio Univ.) IN2025-15
Abstract (in Japanese) (See Japanese page) 
(in English) In graph-based systems, inserting a subgraph that bridges two communities of user interests enables continuous expansion of user interests. For optimal bridging, the inserted subgraph should be equally accessible to random walks (RW) originating from both communities. However, when numerous candidate subgraphs exist, computing RW reachability from both communities for each insertion becomes computationally prohibitive. To address this challenge, we propose a scoring method that leverages precomputed RW arrival rates for each candidate subgraph to efficiently evaluate their impact on RW reachability at the time of insertion. Our approach focuses exclusively on the insertion subgraph itself, precomputing RW arrival rates from nodes shared between the candidate subgraph and each community. We evaluate our method on real-world graphs in terms of both accuracy and computational efficiency. Results demonstrate that the top 10% of subgraphs ranked by our scoring method achieve up to 83% accuracy in identifying valid bridging subgraphs, while reducing computation time by up to 69 times compared to conventional methods that evaluate each insertion individually.
Keyword (in Japanese) (See Japanese page) 
(in English) graph / random walk / graph insertion / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 137, IN2025-15, pp. 25-30, July 2025.
Paper # IN2025-15 
Date of Issue 2025-07-24 (IN) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF IN2025-15

Conference Information
Committee CCS IN  
Conference Date 2025-07-31 - 2025-08-01 
Place (in Japanese) (See Japanese page) 
Place (in English) Global Research Center for Food & Medical Innovation, Hokkaido Univ 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Network Science, Future Network, Cloud/SDN/Virtualization, Contents Delivery/Contents Exchange, and others 
Paper Information
Registration To IN 
Conference Code 2025-07-CCS-IN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Selecting Subgraphs for Bridging Interest Nodes Based on Random Walks 
Sub Title (in English)  
Keyword(1) graph  
Keyword(2) random walk  
Keyword(3) graph insertion  
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1st Author's Name Kazuma Okada  
1st Author's Affiliation Keio University (Keio Univ.)
2nd Author's Name Tsuyoshi Yamashita  
2nd Author's Affiliation Keio University (Keio Univ.)
3rd Author's Name Kunitake Kaneko  
3rd Author's Affiliation Keio University (Keio Univ.)
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Speaker Author-1 
Date Time 2025-07-31 15:05:00 
Presentation Time 25 minutes 
Registration for IN 
Paper # IN2025-15 
Volume (vol) vol.125 
Number (no) no.137 
Page pp.25-30 
#Pages 6 
Date of Issue 2025-07-24 (IN) 

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