no code implementations • 10 Sep 2024 • Siqing Li, Jin-Duk Park, Wei Huang, Xin Cao, Won-Yong Shin, Zhiqiang Xu
Heterogeneous graph neural networks (HGNNs) have significantly propelled the information retrieval (IR) field.
1 code implementation • 25 Aug 2024 • Jin-Duk Park, Kyung-Min Kim, Won-Yong Shin
Collaborative filtering (CF) remains essential in recommender systems, leveraging user--item interactions to provide personalized recommendations.
1 code implementation • 17 Jul 2024 • Jeongeun Lee, SeongKu Kang, Won-Yong Shin, Jeongwhan Choi, Noseong Park, Dongha Lee
Cross-domain recommendation (CDR) extends conventional recommender systems by leveraging user-item interactions from dense domains to mitigate data sparsity and the cold start problem.
no code implementations • 17 Jun 2024 • Yong-Min Shin, Won-Yong Shin
As one of popular quantitative metrics to assess the quality of explanation of graph neural networks (GNNs), fidelity measures the output difference after removing unimportant parts of the input graph.
1 code implementation • 7 Jun 2024 • Yong-Min Shin, Siqing Li, Xin Cao, Won-Yong Shin
However, existing studies often use naive calculations to derive attribution scores from attention, and do not take the precise and careful calculation of edge attribution into consideration.
1 code implementation • 22 Apr 2024 • Jin-Duk Park, Yong-Min Shin, Won-Yong Shin
In this paper, we propose Turbo-CF, a GF-based CF method that is both training-free and matrix decomposition-free.
1 code implementation • 22 Apr 2024 • Yu Hou, Jin-Duk Park, Won-Yong Shin
A recent study has shown that diffusion models are well-suited for modeling the generative process of user-item interactions in recommender systems due to their denoising nature.
no code implementations • 19 Feb 2024 • Sujin Kook, Won-Yong Shin, Seong-Lyun Kim, Seung-Woo Ko
The vision of pervasive artificial intelligence (AI) services can be realized by training an AI model on time using real-time data collected by internet of things (IoT) devices.
1 code implementation • 15 Dec 2023 • Yungi Kim, Taeri Kim, Won-Yong Shin, Sang-Wook Kim
In this paper, we focus on multimedia recommender systems using graph convolutional networks (GCNs) where the multimodal features as well as user-item interactions are employed together.
no code implementations • 29 Nov 2023 • Yong-Min Shin, Won-Yong Shin
Although this can be achieved by applying the inverse propagation $\Pi^{-1}$ before distillation from the teacher, it still comes with a high computational cost from large matrix multiplications during training.
no code implementations • 20 Nov 2023 • Yong-Min Shin, Won-Yong Shin
Although this can be achieved by applying the inverse propagation $\Pi^{-1}$ before distillation from the teacher GNN, it still comes with a high computational cost from large matrix multiplications during training.
1 code implementation • 30 May 2023 • Jin-Duk Park, Siqing Li, Xin Cao, Won-Yong Shin
The multi-criteria (MC) recommender system, which leverages MC rating information in a wide range of e-commerce areas, is ubiquitous nowadays.
no code implementations • 25 Apr 2023 • Jin-Duk Park, Cong Tran, Won-Yong Shin, Xin Cao
Network alignment (NA) is the task of discovering node correspondences across multiple networks.
no code implementations • 10 Apr 2023 • Yu Hou, Cong Tran, Ming Li, Won-Yong Shin
In social networks, the discovery of community structures has received considerable attention as a fundamental problem in various network analysis tasks.
no code implementations • 12 Nov 2022 • Hyebin Kwon, Joungbin An, Dongwoo Lee, Won-Yong Shin
More specifically, after pre-training one of state-of-the-art vision-based models as our backbone network, we re-train our augmented model, consisting of the vision-based model and the multilayer perceptron (MLP) architecture.
no code implementations • 2 Nov 2022 • Hayoung Seong, Junseon Kim, Won-Yong Shin, Howon Lee
Massive Internet of Things (IoT) networks have a wide range of applications, including but not limited to the rapid delivery of emergency and disaster messages.
1 code implementation • 31 Oct 2022 • Yong-Min Shin, Sun-Woo Kim, Won-Yong Shin
Aside from graph neural networks (GNNs) attracting significant attention as a powerful framework revolutionizing graph representation learning, there has been an increasing demand for explaining GNN models.
no code implementations • 29 Sep 2022 • Hwan Kim, Byung Suk Lee, Won-Yong Shin, Sungsu Lim
Graphs are used widely to model complex systems, and detecting anomalies in a graph is an important task in the analysis of complex systems.
no code implementations • 23 Aug 2022 • Yu Hou, Cong Tran, Won-Yong Shin
The discovery of community structures in social networks has gained considerable attention as a fundamental problem for various network analysis tasks.
no code implementations • 23 Aug 2022 • Jin-Duk Park, Cong Tran, Won-Yong Shin, Xin Cao
Network alignment (NA) is the task of discovering node correspondences across different networks.
no code implementations • 10 Feb 2022 • Kyeong-Joong Jeong, Jin-Duk Park, Kyusoon Hwang, Seong-Lyun Kim, Won-Yong Shin
We introduce a data-driven anomaly detection framework using a manufacturing dataset collected from a factory assembly line.
1 code implementation • 26 Jan 2022 • Jin-Duk Park, Cong Tran, Won-Yong Shin, Xin Cao
Network alignment (NA) is the task of finding the correspondence of nodes between two networks based on the network structure and node attributes.
1 code implementation • 19 Aug 2021 • Changwon Seo, Kyeong-Joong Jeong, Sungsu Lim, Won-Yong Shin
In recent years, many recommender systems using network embedding (NE) such as graph neural networks (GNNs) have been extensively studied in the sense of improving recommendation accuracy.
no code implementations • 27 Jun 2021 • Soohyun Park, Won-Yong Shin, Minseok Choi, Joongheon Kim
To overcome this, we need to characterize a new type of drones, so-called charging drones, which can deliver energy to MBS drones.
no code implementations • 5 Jun 2021 • Cong Tran, Won-Yong Shin, Andreas Spitz
Since the structure of complex networks is often unknown, we may identify the most influential seed nodes by exploring only a part of the underlying network, given a small budget for node queries.
1 code implementation • 12 Apr 2021 • Yong-Min Shin, Cong Tran, Won-Yong Shin, Xin Cao
We study the problem of embedding edgeless nodes such as users who newly enter the underlying network, while using graph neural networks (GNNs) widely studied for effective representation learning of graphs.
no code implementations • 18 Dec 2020 • Cong Tran, Dung D. Vu, Won-Yong Shin
It has been insufficiently explored how to perform density-based clustering by exploiting textual attributes on social media.
1 code implementation • 17 Jul 2019 • Cong Tran, Won-Yong Shin, Andreas Spitz, Michael Gertz
In this paper, we present DeepNC, a novel method for inferring the missing parts of a network based on a deep generative model of graphs.
no code implementations • 1 May 2019 • Cong Tran, Jang-Young Kim, Won-Yong Shin, Sang-Wook Kim
As collaborative filtering (CF) is one of the most prominent and popular techniques used for recommender systems, we propose a new clustering-based CF (CBCF) method using an incentivized/penalized user (IPU) model only with ratings given by users, which is thus easy to implement.
no code implementations • 15 Apr 2019 • Adeel Malik, Joongheon Kim, Kwang Soon Kim, Won-Yong Shin
Under our model, we consider a single-hop-based device-to-device (D2D) content delivery protocol and characterize the average hit ratio for the following two file preference cases: the personalized file preferences and the common file preferences.
no code implementations • 14 Jun 2018 • Minh D. Nguyen, Won-Yong Shin
DBSCAN may not be sufficient when the input data type is heterogeneous in terms of textual description.
no code implementations • 9 Jun 2018 • Cong Tran, Won-Yong Shin, Sang-Il Choi
To overcome these problems, we present DIR-ST$^2$, a novel framework for delineating an imprecise region by iteratively performing density-based clustering, namely DBSCAN, along with not only spatio--textual information but also temporal information on social media.
no code implementations • 30 Dec 2017 • Cong Tran, Won-Yong Shin, Andreas Spitz
The discovery of community structures in social networks has gained significant attention since it is a fundamental problem in understanding the networks' topology and functions.