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Metagenomics characterizes the taxonomic diversity of microbial communities by sequencing DNA directly from an environmental sample. One of the main challenges in metagenomics data analysis is the binning step, where each sequenced read is…

Quantitative Methods · Quantitative Biology 2015-05-27 Kévin Vervier , Pierre Mahé , Maud Tournoud , Jean-Baptiste Veyrieras , Jean-Philippe Vert

The combination of multiple classifiers using ensemble methods is increasingly important for making progress in a variety of difficult prediction problems. We present a comparative analysis of several ensemble methods through two case…

Machine Learning · Computer Science 2013-09-20 Sean Whalen , Gaurav Pandey

A main challenge of data-driven sciences is how to make maximal use of the progressively expanding databases of experimental datasets in order to keep research cumulative. We introduce the idea of a modeling-based dataset retrieval engine…

Quantitative Methods · Quantitative Biology 2015-06-19 Ali Faisal , Jaakko Peltonen , Elisabeth Georgii , Johan Rung , Samuel Kaski

The explosion in known microbial diversity in the last two decades has made it abundantly clear that microbes in the environment do not exist in isolation; they are members of communities. Accordingly, omics approaches such as metagenomics…

Quantitative Methods · Quantitative Biology 2024-07-15 James C. Kosmopoulos , Karthik Anantharaman

COMET is a single-pass MapReduce algorithm for learning on large-scale data. It builds multiple random forest ensembles on distributed blocks of data and merges them into a mega-ensemble. This approach is appropriate when learning from…

Machine Learning · Computer Science 2013-03-06 Justin D. Basilico , M. Arthur Munson , Tamara G. Kolda , Kevin R. Dixon , W. Philip Kegelmeyer

Advances in next-generation metagenome sequencing have the potential to revolutionize the point-of-care diagnosis of novel pathogen infections, which could help prevent potential widespread transmission of diseases. Given the high volume of…

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

In systems biology, it is common to measure biochemical entities at different levels of the same biological system. One of the central problems for the data fusion of such data sets is the heterogeneity of the data. This thesis discusses…

Genomics · Quantitative Biology 2019-08-27 Yipeng Song

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

Developing algorithms that are able to generalize to a novel task given only a few labeled examples represents a fundamental challenge in closing the gap between machine- and human-level performance. The core of human cognition lies in the…

Machine Learning · Computer Science 2021-03-23 Kaidi Cao , Maria Brbic , Jure Leskovec

Metagenomics is a powerful approach to study genetic content of environmental samples that has been strongly promoted by NGS technologies. To cope with massive data involved in modern metagenomic projects, recent tools [4, 39] rely on the…

Genomics · Quantitative Biology 2016-03-17 Karel Brinda , Maciej Sykulski , Gregory Kucherov

Mixed communities of organisms are found in many environments (from the human gut to marine ecosystems) and can have profound impact on human health and the environment. Metagenomics studies the genomic material of such communities through…

Genomics · Quantitative Biology 2021-12-23 Hansheng Xue , Vijini Mallawaarachchi , Yujia Zhang , Vaibhav Rajan , Yu Lin

Metagenome, a mixture of different genomes (as a rule, bacterial), represents a pattern, and the analysis of its composition is, currently, one of the challenging problems of bioinformatics. In the present study, the possibility of…

Quantitative Methods · Quantitative Biology 2016-11-04 Valery Kirzhner , Zeev Volkovich , Renata Avros , Katerina Korenblat

Genomic and metagenomic fields, generating huge sets of short genomic sequences, brought their own share of high performance problems. To extract relevant pieces of information from the huge data sets generated by current sequencing…

Data Structures and Algorithms · Computer Science 2016-05-27 Camille Marchet , Antoine Limasset , Lucie Bittner , Pierre Peterlongo

The marine environment is one of the most important sources for microbial biodiversity on the planet. These microbes are drivers for many biogeochemical processes, and their enormous genetic potential is still not fully explored or…

Distributed, Parallel, and Cluster Computing · Computer Science 2016-04-15 Espen Mikal Robertsen , Tim Kahlke , Inge Alexander Raknes , Edvard Pedersen , Erik Kjærner Semb , Martin Ernstsen , Lars Ailo Bongo , Nils Peder Willassen

Dataset condensation aims to condense a large dataset with a lot of training samples into a small set. Previous methods usually condense the dataset into the pixels format. However, it suffers from slow optimization speed and large number…

Computer Vision and Pattern Recognition · Computer Science 2023-09-15 David Junhao Zhang , Heng Wang , Chuhui Xue , Rui Yan , Wenqing Zhang , Song Bai , Mike Zheng Shou

Current metagenomic analysis algorithms require significant computing resources, can report excessive false positives (type I errors), may miss organisms (type II errors / false negatives), or scale poorly on large datasets. This paper…

Databases · Computer Science 2015-01-23 Ashley Mae Conard , Stephanie Dodson , Jeremy Kepner , Darrell Ricke

Metaproteomics has become a crucial omics technology for studying microbiomes. In this area, the Unipept ecosystem, accessible at https://unipept.ugent.be, has emerged as an invaluable resource for analyzing metaproteomic data. It offers…

Molecular Networks · Quantitative Biology 2023-11-14 Tim Van Den Bossche , Pieter Verschaffelt , Tibo Vande Moortele , Peter Dawyndt , Lennart Martens , Bart Mesuere

As key elements within the central dogma, DNA, RNA, and proteins play crucial roles in maintaining life by guaranteeing accurate genetic expression and implementation. Although research on these molecules has profoundly impacted fields like…

For many use cases, combining information from different datasets can be of interest to improve a machine learning model's performance, especially when the number of samples from at least one of the datasets is small. However, a potential…

Machine Learning · Statistics 2023-05-17 Thu Nguyen , Rabindra Khadka , Nhan Phan , Anis Yazidi , Pål Halvorsen , Michael A. Riegler