Search Results for author: Kyumin Lee

Found 24 papers, 13 papers with code

Let's Ask GNN: Empowering Large Language Model for Graph In-Context Learning

no code implementations9 Oct 2024 Zhengyu Hu, Yichuan Li, Zhengyu Chen, Jingang Wang, Han Liu, Kyumin Lee, Kaize Ding

Textual Attributed Graphs (TAGs) are crucial for modeling complex real-world systems, yet leveraging large language models (LLMs) for TAGs presents unique challenges due to the gap between sequential text processing and graph-structured data.

Graph Neural Network In-Context Learning +2

Deep Heterogeneous Contrastive Hyper-Graph Learning for In-the-Wild Context-Aware Human Activity Recognition

1 code implementation27 Sep 2024 Wen Ge, Guanyi Mou, Emmanuel O. Agu, Kyumin Lee

Human Activity Recognition (HAR) is a challenging, multi-label classification problem as activities may co-occur and sensor signals corresponding to the same activity may vary in different contexts (e. g., different device placements).

Graph Learning Human Activity Recognition +1

Reducing and Exploiting Data Augmentation Noise through Meta Reweighting Contrastive Learning for Text Classification

no code implementations26 Sep 2024 Guanyi Mou, Yichuan Li, Kyumin Lee

To boost deep learning models' performance given augmented data/samples in text classification tasks, we propose a novel framework, which leverages both meta learning and contrastive learning techniques as parts of our design for reweighting the augmented samples and refining their feature representations based on their quality.

Contrastive Learning Data Augmentation +3

Heterogeneous Hyper-Graph Neural Networks for Context-aware Human Activity Recognition

no code implementations26 Sep 2024 Wen Ge, Guanyi Mou, Emmanuel O. Agu, Kyumin Lee

In this paper, we argue that context-aware activity visit patterns in realistic in-the-wild data can equivocally be considered as a general graph representation learning task.

Graph Representation Learning Human Activity Recognition

SWE2: SubWord Enriched and Significant Word Emphasized Framework for Hate Speech Detection

no code implementations25 Sep 2024 Guanyi Mou, Pengyi Ye, Kyumin Lee

Our model robustly and significantly performed well under extreme adversarial attack (manipulation of 50% messages), achieving 0. 967 accuracy and 0. 934 macro F1.

Adversarial Attack Hate Speech Detection

An Effective, Robust and Fairness-aware Hate Speech Detection Framework

no code implementations25 Sep 2024 Guanyi Mou, Kyumin Lee

With the widespread online social networks, hate speeches are spreading faster and causing more damage than ever before.

Fairness Hate Speech Detection

Wildlife Product Trading in Online Social Networks: A Case Study on Ivory-Related Product Sales Promotion Posts

1 code implementation25 Sep 2024 Guanyi Mou, Yun Yue, Kyumin Lee, Ziming Zhang

To counter these environmentally damaging illegal operations, in this research, we focus on wildlife product sales promotion behaviors in online social networks.

Empowering Large Language Models for Textual Data Augmentation

no code implementations26 Apr 2024 Yichuan Li, Kaize Ding, Jianling Wang, Kyumin Lee

With the capabilities of understanding and executing natural language instructions, Large language models (LLMs) can potentially act as a powerful tool for textual data augmentation.

Data Augmentation Diversity +1

MEND: Meta dEmonstratioN Distillation for Efficient and Effective In-Context Learning

1 code implementation11 Mar 2024 Yichuan Li, Xiyao Ma, Sixing Lu, Kyumin Lee, Xiaohu Liu, Chenlei Guo

Large Language models (LLMs) have demonstrated impressive in-context learning (ICL) capabilities, where a LLM makes predictions for a given test input together with a few input-output pairs (demonstrations).

Decoder In-Context Learning +2

GRENADE: Graph-Centric Language Model for Self-Supervised Representation Learning on Text-Attributed Graphs

1 code implementation23 Oct 2023 Yichuan Li, Kaize Ding, Kyumin Lee

Self-supervised representation learning on text-attributed graphs, which aims to create expressive and generalizable representations for various downstream tasks, has received increasing research attention lately.

Contrastive Learning Graph Neural Network +3

KEPLET: Knowledge-Enhanced Pretrained Language Model with Topic Entity Awareness

no code implementations2 May 2023 Yichuan Li, Jialong Han, Kyumin Lee, Chengyuan Ma, Benjamin Yao, Derek Liu

In recent years, Pre-trained Language Models (PLMs) have shown their superiority by pre-training on unstructured text corpus and then fine-tuning on downstream tasks.

Entity Linking Language Modelling +3

Extracting and Visualizing Wildlife Trafficking Events from Wildlife Trafficking Reports

no code implementations17 Jul 2022 Devin Coughlin, Maylee Gagnon, Victoria Grasso, Guanyi Mou, Kyumin Lee, Renata Konrad, Patricia Raxter, Meredith Gore

Experts combating wildlife trafficking manually sift through articles about seizures and arrests, which is time consuming and make identifying trends difficult.

HABERTOR: An Efficient and Effective Deep Hatespeech Detector

no code implementations EMNLP 2020 Thanh Tran, Yifan Hu, Changwei Hu, Kevin Yen, Fei Tan, Kyumin Lee, Serim Park

HABERTOR inherits BERT's architecture, but is different in four aspects: (i) it generates its own vocabularies and is pre-trained from the scratch using the largest scale hatespeech dataset; (ii) it consists of Quaternion-based factorized components, resulting in a much smaller number of parameters, faster training and inferencing, as well as less memory usage; (iii) it uses our proposed multi-source ensemble heads with a pooling layer for separate input sources, to further enhance its effectiveness; and (iv) it uses a regularized adversarial training with our proposed fine-grained and adaptive noise magnitude to enhance its robustness.

Hierarchical Evidence Set Modeling for Automated Fact Extraction and Verification

1 code implementation EMNLP 2020 Shyam Subramanian, Kyumin Lee

Automated fact extraction and verification is a challenging task that involves finding relevant evidence sentences from a reliable corpus to verify the truthfulness of a claim.

Claim Verification Sentence

Where Are the Facts? Searching for Fact-checked Information to Alleviate the Spread of Fake News

2 code implementations EMNLP 2020 Nguyen Vo, Kyumin Lee

The search can directly warn fake news posters and online users (e. g. the posters' followers) about misinformation, discourage them from spreading fake news, and scale up verified content on social media.

Ad-Hoc Information Retrieval Fact Checking +5

Quaternion-Based Self-Attentive Long Short-Term User Preference Encoding for Recommendation

no code implementations31 Aug 2020 Thanh Tran, Di You, Kyumin Lee

Quaternion space has brought several benefits over the traditional Euclidean space: Quaternions (i) consist of a real and three imaginary components, encouraging richer representations; (ii) utilize Hamilton product which better encodes the inter-latent interactions across multiple Quaternion components; and (iii) result in a model with smaller degrees of freedom and less prone to overfitting.

Recommendation Systems

Attributed Multi-Relational Attention Network for Fact-checking URL Recommendation

1 code implementation7 Jan 2020 Di You, Nguyen Vo, Kyumin Lee, Qiang Liu

To combat fake news, researchers mostly focused on detecting fake news and journalists built and maintained fact-checking sites (e. g., Snopes. com and Politifact. com).

Fact Checking Graph Attention +1

Learning from Fact-checkers: Analysis and Generation of Fact-checking Language

1 code implementation5 Oct 2019 Nguyen Vo, Kyumin Lee

In fighting against fake news, many fact-checking systems comprised of human-based fact-checking sites (e. g., snopes. com and politifact. com) and automatic detection systems have been developed in recent years.

Fact Checking Fake News Detection +2

Adversarial Mahalanobis Distance-based Attentive Song Recommender for Automatic Playlist Continuation

1 code implementation8 Jun 2019 Thanh Tran, Renee Sweeney, Kyumin Lee

Our first approach uses user-playlist-song interactions, and combines Mahalanobis distance scores between (i) a target user and a target song, and (ii) between a target playlist and the target song to account for both the user's preference and the playlist's theme.

Metric Learning

Signed Distance-based Deep Memory Recommender

1 code implementation1 May 2019 Thanh Tran, Xinyue Liu, Kyumin Lee, Xiangnan Kong

Personalized recommendation algorithms learn a user's preference for an item by measuring a distance/similarity between them.

Recommendation Systems

Regularizing Matrix Factorization with User and Item Embeddings for Recommendation

2 code implementations31 Aug 2018 Thanh Tran, Kyumin Lee, Yiming Liao, Dongwon Lee

Following recent successes in exploiting both latent factor and word embedding models in recommendation, we propose a novel Regularized Multi-Embedding (RME) based recommendation model that simultaneously encapsulates the following ideas via decomposition: (1) which items a user likes, (2) which two users co-like the same items, (3) which two items users often co-liked, and (4) which two items users often co-disliked.

The Rise of Guardians: Fact-checking URL Recommendation to Combat Fake News

1 code implementation20 Jun 2018 Nguyen Vo, Kyumin Lee

Despite the existence of these systems, fake news is still wildly shared by online users.

Information Retrieval Social and Information Networks

Identifying On-time Reward Delivery Projects with Estimating Delivery Duration on Kickstarter

no code implementations12 Oct 2017 Thanh Tran, Kyumin Lee, Nguyen Vo, Hongkyu Choi

In Crowdfunding platforms, people turn their prototype ideas into real products by raising money from the crowd, or invest in someone else's projects.

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