Research

Research Interests

Probability, Statistics, Bioinformatics and Computational Biology, Forensic Science

Selected Publications in Probability and Statistics

  • K P Choi (1988). Some sharp inequalities for martingale transforms. Trans. Amer. Math. Soc., 307, 279-300.
  • K P Choi (1992). A sharp inequality for martingale transforms and the unconditional basis constant of a monotone basis in $L^p (0,1)$. Trans. Amer. Math. Soc., 330, 509-529.
  • Louis H. Y. Chen and K P Choi (1992). Some asymptotic and large deviation results in Poisson approximation. Ann. Probab., 20, 1867-1876.
  • K P Choi (1993). A remark on the inverse H\”{o}lder inequality. J. Math. Anal. Appl., 180, 117-121.
  • K P Choi (1994). On the medians of Gamma distributions and an equation of Ramanujan. Proc. Amer. Math. Soc., 121, 245-251.
  • A. D. Barbour, Louis H. Y. Chen and K P Choi (1995). Poisson approximation for unbounded functions, I: independent summands. Statistica Sinica, 5, 749-766.
  • K P Choi and Michael J. Klass (1997). Some asymptotically best possible prophet inequalities for convex functions of sums of independent variates and unordered martingale difference sequences. Ann. Probab., 25, 803-811.
  • K P Choi and Aihua Xia (2002). Approximating the number of successes in independent trials: Binomial versus Poisson. Ann. Appl. Probab., 12, 1139-1148.
  • A. D. Barbour and K P Choi (2004). A non-uniform bound for translated Poisson approximation. Electronic J. Probability, 9, 18-36.
  • GJ Babu, ZD Bai, KP Choi, V Mangalam (2011). Limit theorems for functions of marginal quantiles. Bernoulli, 17(2), 671-686.
  • J \”{A}rje, KP Choi, F Divino, K Meissner, S K\”{a}rkk\”{a}inen (2016). Understanding the Statistical Properties of the Percent Model Affinity Index Can Improve Biomonitoring Related Decision Making. Stochastic Environmental Research and Risk Assessment, 30(7), 1-28.
  • ZD Bai, KP Choi, Y Fujikoshi (2018). Consistency of AIC and BIC in estimating the number of significant components in high-dimensional principal component analysis. Ann. Statist., 46(3), 1050-1076.
  • ZD Bai, KP Choi, Y Fujikoshi (2018). Limiting Behavior of Eigenvalues in High-dimensional MANOVA via RMT. Ann. Statist., 46(6A), 2985-3013.

 

Selected Publications in Bioinformatics and Computational Biology

  • K P Choi and Louxin Zhang (2004). Sensitivity analysis and efficient method for identifying optimal spaced seeds. J. Computer & System Sciences, 68, 22-40.
  • K P Choi, Fanfan Zeng and Louxin Zhang (2004). Good spaced seeds for homology search. Bioinformatics, 20, 1053-1059.
  • David S H Chew, K P Choi, Ming-Ying Leung and H. Heidner (2004). Palindromes in SARS and other coronaviruses. INFORMS J. on Computing, 16 (Special issue on Computational Biology/Bioinformatics), 331-340.
  • Ming Ying Leung, K P Choi, Aihua Xia and Louis H. Y. Chen (2005). Nonrandom clusters of palindromes in herpesvirus genomes. J. Computational Biology, 12, 331-354.
  • David S. H. Chew, K P Choi and Ming Ying Leung (2005). Scoring schemes of palindrome clusters for more sensitive prediction of replication origins in herpesviruses. Nucleic Acids Res., 33(15), e134.
  • Kang Ning, K P Choi, Hon Wai Leong and Louxin Zhang (2005). A post-processing method for optimizing synthesis strategy for oligonucleotide microarrays. Nucleic Acids Res., 33(17), e144.
  • F. Preparata, Louxin Zhang and K P Choi (2005). Quick, practical selection of effective seeds for homology search. J. Computational Biology, 12, 1137-1152.
  • David S. H. Chew, Ming Ying Leung and K P Choi (2007). AT excursion: a new approach to predict replication origins in viral genomes by locating AT-rich regions. BMC Bioinformatics, 8:163.
  • HH Do, KP Choi, FP Preparata, WK Sung, LX Zhang. (2008). Spectrum-based de novo repeat detection in genomic sequences. J. Computational Biology, 15, 469-487.
  • J An, KP Choi, CA Wells, YPP Chen (2010). Identifying co-regulating microRNA groups. J. Bioinformatics and Computational Biology, 8, 99-115.
  • R Cruz-Cano, David SH Chew, KP Choi, MY Leung (2010). Least-squares support vector machine approach to viral replication origin prediction. INFORMS J. on Computing, 22(3), 457-470.
  • NH Tran, KP Choi, LX Zhang (2013). Counting Motifs in the Entire Biological Network from Noisy and Incomplete Data. Proceedings of the 17th Annual International Conference, RECOMB2013, Beijing, China, April 7-10, 2013 (Deng et al., Eds), Lecture Notes in Bioinformatics 7821, 269-270.
  • S Li, KP Choi, T Wu (2013). Degree distribution of large networks generated by the partial duplication model. Theoretical Computer Science, 476, 94-108.
  • NH Tran, KP Choi, LX Zhang (2013). Counting Motifs in the human interactome. Nature Communications, 4: 2241 doi:10.1038/ncomms3241.
  • S Li, KP Choi, T Wu, LX Zhang (2013). Maximum likelihood inference of the evolutionary history of a PPI network from the duplication history of its proteins. IEEE/ACM Transactions on Computational Biology and Bioinformatics, 10(6), 1412-1421.
  • S Zhang, D Tian, NH Tran, KP Choi, LX Zhang (2014). Profiling the Transcription Factor Regulatory Networks of Human Cell Types. Nucleic Acids Res., 42(20), 12380-12387.
  • K Lim, ZH Li, KP Choi, L Wong (2015). A quantum leap in the reproducibility, precision, and sensitivity of gene expression profile analysis even when sample size is extremely small. J. Bioinformatics and Computational Biology, 13(4), DOI: 10.1142/S0219720015500183
  • T Wu, KP Choi (2016). On joint subtree distributions under two evolutionary models. Theoretical Population Biology, 108, 13-23.
  • HWL Koh, F Damian, C Vogel, KP Choi, RM Ewing, HW Choi (2019). iOmicsPASS: network-based integration of multiomics data for predictive subnetwork discovery. npj Systems Biology and Applications.
  • KP Choi, A Thompson, T Wu (2020).¬† On cherry and pitchfork distributions of random rooted and unrooted phylogenetic trees. Theoretical Population Biology, 132, 92-104.

 

Collaborative publications 

(a) Biomedical

  • A Chong, Z Zhang, K P Choi, V Choudhary, M B A Djamgoz, G Zhang and V B Bajic (2007). Promoter profiling and coexpression data analysis identifies 24 novel genes that are coregulated with AMPA receptor genes, GRIAs. Genomics, 89, 378-384.
  • GCH Koh, C Chen, A Cheong, BC Tai, KP Choi, NP Fong, KM Chan, BY Tan, R Petrella, A Thind, D Koh, KS Chia (2012). Trade-offs between effectiveness and efficiency in stroke rehabilitation. International J. Stroke, 7(8), 606-614.
  • BW Teo, PT Loh, WK Wong, PJ Ho, KP Choi, QC Toh, H Xu, S Saw, T Lau, S Sethi, EJC Lee (2015). Spot urine estimations are equivalent to 24-hour urine assessments of urine protein excretion for predicting clinical outcomes. International Journal of Nephrology, 2015, Article ID 156484.

(b) Social Sciences

  • MYL Chiu, C Ghoh, G Chung, KP Choi (2019). Multistressed families in Singapore: A focus on transnational families. Children and Youth Services Review, 101, 372-382.

 

Book (editing) and Others

  • Louis HY Chen, KP Choi, JH Lou and KY Hu (1992). Probability Theory: Proceedings of the 1989 Singapore Probability Conference held at National University of Singapore, June 8-16, 1989, Walter De Gruyter & Co., Berlin.
  • KP Choi (2018). Sapere aude (Dare to know)! Interview of Moshe Y. Vardi. Imprints 32 Jul-Dec Issue