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Cheonbok Park

10 accepted papers

2025

Code-Switching Curriculum Learning for Multilingual Transfer in LLMs

ACL 2025finding

Large language models (LLMs) now exhibit near human-level performance in various tasks, but their performance drops drastically after a handful of high-resource languages due to the imbalance in pre-training data. Inspired by the human process of second language acquisition, particularly code-switch…

2025

KMMLU: Measuring Massive Multitask Language Understanding in Korean

NAACL 2025long

We propose KMMLU, a Korean benchmark with 35,030 expert-level multiple-choice questions across 45 subjects ranging from humanities to STEM. While prior Korean evaluation tools heavily rely on translated versions of existing English benchmarks, KMMLU is collected from original Korean exams, thereby c…

2025

Peri-LN: Revisiting Normalization Layer in the Transformer Architecture

ICML 2025poster

Selecting a layer normalization (LN) strategy that stabilizes training and speeds convergence in Transformers remains difficult, even for today’s large language models (LLM). We present a comprehensive analytical foundation for understanding how different LN strategies influence training dynamics in…

Cited by 0SourcePDFScholar
2024

Adaptive Contrastive Decoding in Retrieval-Augmented Generation for Handling Noisy Contexts

EMNLP 2024finding

When using large language models (LLMs) in knowledge-intensive tasks, such as open-domain question answering, external context can bridge the gap between external knowledge and the LLMs’ parametric knowledge.Recent research has been developed to amplify contextual knowledge over the parametric knowl…

2024

Aligning Language Models to Explicitly Handle Ambiguity

EMNLP 2024main

In interactions between users and language model agents, user utterances frequently exhibit ellipsis (omission of words or phrases) or imprecision (lack of exactness) to prioritize efficiency. This can lead to varying interpretations of the same input based on different assumptions or background kno…

2023

Towards Accurate Translation via Semantically Appropriate Application of Lexical Constraints

ACL 2023findings

Lexically-constrained NMT (LNMT) aims to incorporate user-provided terminology into translations. Despite its practical advantages, existing work has not evaluated LNMT models under challenging real-world conditions. In this paper, we focus on two important but understudied issues that lie in the cu…

2022

DaLC: Domain Adaptation Learning Curve Prediction for Neural Machine Translation

ACL 2022findings

Domain Adaptation (DA) of Neural Machine Translation (NMT) model often relies on a pre-trained general NMT model which is adapted to the new domain on a sample of in-domain parallel data. Without parallel data, there is no way to estimate the potential benefit of DA, nor the amount of parallel sampl…

2022

Reversible Instance Normalization for Accurate Time-Series Forecasting against Distribution Shift

ICLR 2022poster

Statistical properties such as mean and variance often change over time in time series, i.e., time-series data suffer from a distribution shift problem. This change in temporal distribution is one of the main challenges that prevent accurate time-series forecasting. To address this issue, we propose…

2022

Specializing Multi-domain NMT via Penalizing Low Mutual Information

EMNLP 2022main

Multi-domain Neural Machine Translation (NMT) trains a single model with multiple domains. It is appealing because of its efficacy in handling multiple domains within one model. An ideal multi-domain NMT learns distinctive domain characteristics simultaneously, however, grasping the domain peculiari…

2021

Unsupervised Neural Machine Translation for Low-Resource Domains via Meta-Learning

ACL 2021long

Unsupervised machine translation, which utilizes unpaired monolingual corpora as training data, has achieved comparable performance against supervised machine translation. However, it still suffers from data-scarce domains. To address this issue, this paper presents a novel meta-learning algorithm f…