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  1. Article

    Open Access

    Alterations in colorectal cancer virome and its persistence after surgery

    Viruses are a key component of the colon microbiome, but the relationship between virome and colorectal cancer (CRC) remains poorly understood. We seek to identify alterations in the viral community that is ch...

    Si **an Ho, Jia-Hao Law, Chin-Wen Png, Rudi Alberts, Yongliang Zhang in Scientific Reports (2024)

  2. Article

    Open Access

    Evolutionary shift detection with ensemble variable selection

    Abrupt environmental changes can lead to evolutionary shifts in trait evolution. Identifying these shifts is an important step in understanding the evolutionary history of phenotypes. The detection performance...

    Wensha Zhang, Toby Kenney, Lam Si Tung Ho in BMC Ecology and Evolution (2024)

  3. No Access

    Article

    Adaptive group Lasso neural network models for functions of few variables and time-dependent data

    Learning nonlinear functions from time-varying measurements is always difficult due to the high correlation among observations. This task is more challenging when the target function is high dimensional. In th...

    Lam Si Tung Ho, Nicholas Richardson in Sampling Theory, Signal Processing, and Da… (2023)

  4. No Access

    Article

    SPADE4: Sparsity and Delay Embedding Based Forecasting of Epidemics

    Predicting the evolution of diseases is challenging, especially when the data availability is scarce and incomplete. The most popular tools for modelling and predicting infectious disease epidemics are compart...

    Esha Saha, Lam Si Tung Ho, Giang Tran in Bulletin of Mathematical Biology (2023)

  5. No Access

    Article

    When can we reconstruct the ancestral state? Beyond Brownian motion

    Reconstructing the ancestral state of a group of species helps answer many important questions in evolutionary biology. Therefore, it is crucial to understand when we can estimate the ancestral state accuratel...

    Nhat L. Vu, Thanh P. Nguyen, Binh T. Nguyen, Vu Dinh in Journal of Mathematical Biology (2023)

  6. No Access

    Article

    Ancestral state reconstruction with large numbers of sequences and edge-length estimation

    Likelihood-based methods are widely considered the best approaches for reconstructing ancestral states. Although much effort has been made to study properties of these methods, previous works often assume that...

    Lam Si Tung Ho, Edward Susko in Journal of Mathematical Biology (2022)

  7. Article

    Open Access

    Characterization of oral virome and microbiome revealed distinctive microbiome disruptions in paediatric patients with hand, foot and mouth disease

    While the underlying determinants are unclear, hand, foot and mouth disease (HFMD) presents a wide spectrum of clinical manifestations with varying severity in different individuals. Recently, many studies ide...

    Si **an Ho, Nyo Min, Emmerie Phaik Yen Wong, Chia Yin Chong in npj Biofilms and Microbiomes (2021)

  8. No Access

    Article

    On the convergence of the maximum likelihood estimator for the transition rate under a 2-state symmetric model

    Maximum likelihood estimators are used extensively to estimate unknown parameters of stochastic trait evolution models on phylogenetic trees. Although the MLE has been proven to converge to the true value in t...

    Lam Si Tung Ho, Vu Dinh, Frederick A. Matsen IV in Journal of Mathematical Biology (2020)

  9. No Access

    Article

    Birth/birth-death processes and their computable transition probabilities with biological applications

    Birth-death processes track the size of a univariate population, but many biological systems involve interaction between populations, necessitating models for two or more populations simultaneously. A lack of ...

    Lam Si Tung Ho, Jason Xu, Forrest W. Crawford in Journal of Mathematical Biology (2018)

  10. No Access

    Article

    Phase transition on the convergence rate of parameter estimation under an Ornstein–Uhlenbeck diffusion on a tree

    Diffusion processes on trees are commonly used in evolutionary biology to model the joint distribution of continuous traits, such as body mass, across species. Estimating the parameters of such processes from ...

    Cécile Ané, Lam Si Tung Ho, Sebastien Roch in Journal of Mathematical Biology (2017)

  11. Chapter and Conference Paper

    Naturalistic Human-Robot Interaction Design for Control of Unmanned Ground Vehicles

    This study explored the effectiveness of multi-modal interaction techniques to enable dismounted soldiers to manage their digital information systems and Unmanned Ground Vehicles (UGV) in urban environments. T...

    John Kok Tiong Soo, Angela Li Sin Tan in HCI International 2016 – Posters' Extended… (2016)

  12. No Access

    Chapter and Conference Paper

    Learning from Non-iid Data: Fast Rates for the One-vs-All Multiclass Plug-in Classifiers

    We prove new fast learning rates for the one-vs-all multiclass plug-in classifiers trained either from exponentially strongly mixing data or from data generated by a converging drifting distribution. These are...

    Vu Dinh, Lam Si Tung Ho, Nguyen Viet Cuong in Theory and Applications of Models of Compu… (2015)

  13. No Access

    Chapter and Conference Paper

    Correlation of Aberrant Methylation of APC Gene to MTHFR C677T Genetic Polymorphisms in Hepatic Carcinoma

    Object To investigate the relationship between aberrant hypermethylation of APC gene and methylenetetrahydrofolate reductase (MTHFR) C677T genetic polymorphisms in Hepatic Carcinoma. Method Hepatic...

    Lian-Hua Cui, Meng Liu, Hong-Zong Si in Frontier and Future Development of Informa… (2014)

  14. No Access

    Chapter and Conference Paper

    Generalization and Robustness of Batched Weighted Average Algorithm with V-Geometrically Ergodic Markov Data

    We analyze the generalization and robustness of the batched weighted average algorithm for V-geometrically ergodic Markov data. This algorithm is a good alternative to the empirical risk minimization algorithm...

    Nguyen Viet Cuong, Lam Si Tung Ho, Vu Dinh in Algorithmic Learning Theory (2013)