Publications (selected)

• Ahn, S.*, Lim, J.*, Jiang, W., Lee, S., Wang, X. (*joint first author) (2025). Structure preserving t-SNE of matrix framed data. Computational and Structural Biotechnology Journal. doi.org/10.1016/j.csbj.2025.05.019

• Pyo, S.-I., Ahn, S., Kwon, S.-S. (2025). Visualization algorithm based on FDR control testing for dimension reduction of textual data. Data Technologies and Applications. doi.org/10.1108/DTA-04-2024-0373

• Chung, D. Kwon, S., Ahn, S.* (*corresponding author) (2024). Enhanced Trajectory Data Visualization: A Dynamic Time Warping Integrated t-SNE Approach with Real-Data Applications. Communications in Statistics - Simulation and Computation. In Press. doi.org/10.1080/03610918.2024.2430732

• Ahn, S., Moon, C., Wang, X., Lim, J. (2024). New Scheme of Empirical Likelihood Method for Ranked Set Sampling: Applications to Two One Sample Problems. International Statistical Review. In Press. doi.org/10.1111/insr.12589

• Ahn, S.*, Lee, J.S.*, Lee M.W., Han, S., Min, J.H., Cha, D.I., Song, K.D., Kang, T.W., Rhim, H. (*joint first author) (2024). Percutaneous radiofrequency ablation of hepatocellular carcinomas abutting the right posterior diaphragm: factors associated with tumor recurrence and overall survival. Acta Radiologica. In Press.

• Ahn, S.*, Cho, Y.Y.*, Lee, E.K., Park, Y.J., Choi, D., Kim, B.-Y., Jung, C.-H., Mok, J.O., Kim, C.-H., Kim, S.W. (*joint first author) (2024). Malignancy Risk of Follicular Neoplasm (Bethesda IV) With Variable Cutoffs of Tumor Size: A Systemic Review and Meta-Analysis. Journal of Clinical Endocrinology & Metabolism, 109(5), 1383-1392.

• Ahn S.*, Choi, Y.G.*, and Kim, J. (*joint first author) (2023). Model-based clustering for mixed data with arbitrary dependency structure. IEEE Access, 11, 75945.

• Cha, D.I.*, Ahn S.*, Lee, M.W., Jeong, W.K., Song, K.D., Kang, T.W., and Rhim, H. (* joint first author) (2023). Risk group stratification for recurrence-free survival and early tumor recurrence after radiofrequency ablation for hepatocellular carcinoma. Cancers, 15(3), 687.

• Choi, E.-Y., Park, J.-S., Min, D., Ahn, S., and Ahn, J.-A. (2023). Heart failure-smart life: a randomzed controlled trial of a mobile app for self-management in patients with heart failure. BMC Cardiovascular Disorders 23, 7.

• Ahn, S., Wang, X., Lim, J. (2022). Efficient sample allocation by local adjustment for unbalanced ranked set sampling. Springer.

• Cao, Y., Seo, K., and Lim, J., Ahn, S.* (*corresponding author) (2022). Estimation of high-dimensional sparse cross correlation matrix. Communications for Statistical Applications and Methods 29(6), 1-10.

• Ahn, S., Wang, X., Wang, M., and Lim, J. (2022). On Continuity Correction for RSS-structured Cluster Randomized Designs with Binary Outcomes. Metron 80, 383-397.

• Oh, H., Park, H.J., Oh, J., Lee, E.S., Park, S.B, Cha, M.J., and Ahn, S. (2022). Hyperechoic pancreas on ultrasonography: an analysis of its severity and clinical implications. Ultrasonography 41(2), 335.

• Ke, S.E., Lee, M.W., Min, J.H., Ahn, S., Rhim, H., Kang, T.W., Song, K.D., Kim, J.M., Choi, G.-S., Cha, D.I., Lim, H.K. (2022). Laparoscopic radiofrequency ablation of subcapsular hepatocellular carcinomas: risk factors related to a technical failure. Surgical Endoscopy 36, 504-514.

• Wang, M., Wang, X., Lim, J., and Ahn, S. (2020). Using Ranked Set Sampling with Binary Outcomes in Cluster Randomized Designs. The Candian Journal of Statistics 48(3), 342-365.

• Ahn, S., Choi, H., Lim, J., and Lee, K.E. (2020). Self-Semi-Superviesed Clustering. Journal of Korean Statistical Society 49, 161-176.

• Lee, S.J., Wang, H., Ahn, S., Son, M.K., Hyun, G.H., Yoon, S.J., Lee, J., Park, J.H., Lim, J., Hong, S-S, and Kwon, S.W. (2019). Metabolomics approach based on multivariate techniques for blood transfusion reactions. Scientic Reports 9, 1740.

• Ahn, S., Lim, J., Paik, M.C., Sacco, R.L., and Elkind, M.S. (2018). Cox model with intervally censored covariate in cohort studies. Biometrical Journal, 60, 797-814.

• Lee, S.J., Yi. T., Ahn, S., Lim, D. K., Kim, S.-N., Lee, H.-J., Cho, Y.-K., Lim, J.-Y., Sung, J.-H., Yun, J.-H., Lim, J., Song, S.U., and Kwon, S. W. (2018). Comparative study on metabolite level in tissue-specic human mesenchymal stem cells by an ultra-performance liquid chromatography quadrupole time of flight mass spectrometry, Analytica Chimica Acta 1024, 112-122.

• Ahn, S.*, Wang, X*, and Lim J. (* joint first author) (2017). Unbalanced ranked set sampling in cluster randomized studies. Journal of Statistical Planning and Inference. 187, 1-16.

• Ahn, S., Wang, X., and Lim, J. (2017). On unbalanced group sizes in cluster randomized designs using balanced ranked set sampling. Statistics and Probability Letters, 123, 210-217.

• Lee, D-K, Ahn, S., Cho, H.Y., Yun, H.Y., Park, J.H., Lim, J., Lee, J., and Kwon, S.W. (2016). Metabolic response induced by parasitic plant-fungi interactions hinder the plant host from facilitating amino sugar and nucleotide sugar metabolism in the host. Scientic Reports, 6, 37434.

• Ahn, S.*, Kim, K*, Lim, J., Yoo, B.C., Hwang, J.H., and Jang, W. (* joint first author) (2015). Detection of pancreatic cancer biomarkers using mass spectrometry. Cancer Informatics, 13(Suppl 7), 45-53.

• Ahn, S., Lim, J., and Wang, X. (2014) The Student's t approximation to distributions of pivotal statistics from ranked set samples. Journal of the Korean Statistical Society, 43(4), 643-652.

• Chen, M., Ahn, S., Wang, X., and Lim, J. (2014). Generalized isotonized mean estimators for judgment post-stratication with multiple rankers. Journal of Agricultural, Biological, and Environmental Statistics, 19(4), 405-418.

• Lee, S.J., Woo, S., Ahn, S., Lim, D.K., Hong, J.Y., Park, J.H., Lim, J., Kim, M., and Kwon, S.W. (2014). Functional interpretation of metabolomics data as a new method for predicting long-term side effects: treatment of atopic dermatitis in infants. Scientic Reports, 4, 7408.

• Lee, S.J., Yi, T., Ahn, S., Lim, D.K., Hong, J.Y., Cho, Y.K., Lim, J., Song, S.U., and Kwon, S.W. (2014). Senescing human bone-marrow-derived clonal mesenchymal stem cells have altered lysophospholipid composition and functionality. Journal of Proteome research, 13(3), 1438-1449.

Submitted / In Preparation

• Conformalized quality control for histogram-valued data (with Lee, S., and Lim, J.)

• Quality control for signal data in frequency domain

• Conformal prediction for multivariate data (with Lim, J. and Jung, Y.)

• Supervised t-SNE for imbalanced data

• 1-SVM based outlier detection for histogram-valued data (with Lee, S., Jung, Y. and Lim, J.)

• Prediction model development using EGG data (with Wang, X.)

• Jackknife empirical likelihood for AUC based on RSS (with Lim, J.)

• RSS R Package (with Moon, C.)

• Model based clustering with optimal scoring for ordinal data: OS-Mclust. (with Lee, K.)