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Metagenomics has led to significant advancements in many fields. Metagenomic analysis commonly involves the key tasks of determining the species present in a sample and their relative abundances. These tasks require searching large…

Phylogenetic placement refers to a family of tools and methods to analyze, visualize, and interpret the tsunami of metagenomic sequencing data generated by high-throughput sequencing. Compared to alternative (e. g., similarity-based)…

Populations and Evolution · Quantitative Biology 2025-01-09 Lucas Czech , Alexandros Stamatakis , Micah Dunthorn , Pierre Barbera

Future upgrades to the LHC will pose considerable challenges for traditional particle track reconstruction methods. We investigate how artificial Neural Networks and Deep Learning could be used to complement existing algorithms to increase…

Instrumentation and Detectors · Physics 2019-10-16 Felix Dietrich

Metagenomic data, comprising mixed multi-species genomes, are prevalent in diverse environments like oceans and soils, significantly impacting human health and ecological functions. However, current research relies on K-mer, which limits…

Genomics · Quantitative Biology 2024-12-30 ChenRui Duan , Zelin Zang , Yongjie Xu , Hang He , Zihan Liu , Siyuan Li , Zijia Song , Ju-Sheng Zheng , Stan Z. Li

Over the recent years, the field of whole metagenome shotgun sequencing has witnessed significant growth due to the high-throughput sequencing technologies that allow sequencing genomic samples cheaper, faster, and with better coverage than…

Genomics · Quantitative Biology 2014-04-04 Sohan Seth , Niko Välimäki , Samuel Kaski , Antti Honkela

The large volumes of sequencing data required to sample complex environments deeply pose new challenges to sequence analysis approaches. De novo metagenomic assembly effectively reduces the total amount of data to be analyzed but requires…

Minimizing data storage poses a significant challenge in large-scale metagenomic projects. In this paper, we present a new method for improving the encoding of FASTQ files generated by metagenomic sequencing. This method incorporates…

Information Theory · Computer Science 2024-01-04 Diogo Pratas , Armando J. Pinho

The extraction of k-mers from sequencing reads is an important task in many bioinformatics applications, such as all DNA sequence analysis methods based on de Bruijn graphs. These methods tend to be more accurate when the used k-mers are…

Genomics · Quantitative Biology 2021-10-01 Miika Leinonen , Leena Salmela

Deep sequencing has enabled the investigation of a wide range of environmental microbial ecosystems, but the high memory requirements for {\em de novo} assembly of short-read shotgun sequencing data from these complex populations are an…

Genomics · Quantitative Biology 2015-06-03 Jason Pell , Arend Hintze , Rosangela Canino-Koning , Adina Howe , James M. Tiedje , C. Titus Brown

Metagenomics has led to significant advances in many fields. Metagenomic analysis commonly involves the key tasks of determining the species present in a sample and their relative abundances. These tasks require searching large metagenomic…

The ability to quickly and accurately identify microbial species in a sample, known as metagenomic profiling, is critical across various fields, from healthcare to environmental science. This paper introduces a novel method to profile…

Genomics · Quantitative Biology 2025-04-10 Riselda Kodra , Hadjer Benmeziane , Irem Boybat , William Andrew Simon

We propose a frame-based representation of k-mers for detecting sequencing errors and rare variants in next generation sequencing data obtained from populations of closely related genomes. Frames are sets of non-orthogonal basis functions,…

Genomics · Quantitative Biology 2016-04-19 Raunaq Malhotra , Manjari Mukhopadhyay , Mary Poss , Raj Acharya

Deep learning (DL) techniques have shown unprecedented success when applied to images, waveforms, and text. Generally, when the sample size ($N$) is much bigger than the number of features ($d$), DL often outperforms other machine learning…

Computer Vision and Pattern Recognition · Computer Science 2018-06-26 Thanh Hai Nguyen , Edi Prifti , Yann Chevaleyre , Nataliya Sokolovska , Jean-Daniel Zucker

Metagenomic studies have increasingly utilized sequencing technologies in order to analyze DNA fragments found in environmental samples.One important step in this analysis is the taxonomic classification of the DNA fragments. Conventional…

Genomics · Quantitative Biology 2020-02-11 Andreas Georgiou , Vincent Fortuin , Harun Mustafa , Gunnar Rätsch

Plant breeding programs extensively monitor the evolution of seed kernels for seed certification, wherein lies the need to appropriately label the seed kernels by type and quality. However, the breeding environments are large where the…

Computer Vision and Pattern Recognition · Computer Science 2021-10-07 Venkat Margapuri , Niketa Penumajji , Mitchell Neilsen

A basic problem in metagenomics is to assign a sequenced read to the correct species in the reference collection. In typical applications in genomic epidemiology and viral metagenomics the reference collection consists of set of species…

Data Structures and Algorithms · Computer Science 2020-06-11 Dustin Cobas , Veli Mäkinen , Massimiliano Rossi

Estimating the abundances of all $k$-mers in a set of biological sequences is a fundamental and challenging problem with many applications in biological analysis. While several methods have been designed for the exact or approximate…

Quantitative Methods · Quantitative Biology 2019-02-28 Leonardo Pellegrina , Cinzia Pizzi , Fabio Vandin

The utility of DNA sequence substrings (k-mers) in alignment-free phylogenetic classification, including that of bacteria and viruses, is increasingly recognized. However, its biological basis eludes many twenty-first century practitioners.…

Populations and Evolution · Quantitative Biology 2019-04-29 Donald R. Forsdyke

The analysis of biological sequencing data has been one of the biggest applications of string algorithms. The approaches used in many such applications are based on the analysis of k-mers, which are short fixed-length strings present in a…

Data Structures and Algorithms · Computer Science 2020-06-15 Rayan Chikhi , Jan Holub , Paul Medvedev

Identifying a set of homogeneous clusters in a heterogeneous dataset is one of the most important classes of problems in statistical modeling. In the realm of unsupervised partitional clustering, k-means is a very important algorithm for…

Machine Learning · Statistics 2017-05-23 J. Andrew Howe