0000000000822224

AUTHOR

John Barrett

showing 6 related works from this author

Random forests, a novel approach for discrimination of fish populations using parasites as biological tags.

2008

Due to the complexity of host-parasite relationships, discrimination between fish populations using parasites as biological tags is difficult. This study introduces, to our knowledge for the first time, random forests (RF) as a new modelling technique in the application of parasite community data as biological markers for population assignment of fish. This novel approach is applied to a dataset with a complex structure comprising 763 parasite infracommunities in population samples of Atlantic cod, Gadus morhua, from the spawning/feeding areas in five regions in the North East Atlantic (Baltic, Celtic, Irish and North seas and Icelandic waters). The learning behaviour of RF is evaluated in …

PopulationPopulation DynamicsSample (statistics)Host-Parasite InteractionsFish DiseasesGadusAnimalsParasiteseducationAtlantic Oceaneducation.field_of_studyArtificial neural networkbiologybusiness.industrySampling (statistics)Pattern recognitionbiology.organism_classificationLinear discriminant analysisRandom forestFisheryStatistical classificationInfectious DiseasesGadus morhuaParasitologyArtificial intelligencebusinessAlgorithmsInternational journal for parasitology
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Mining parasite data using genetic programming.

2005

Genetic programming is a technique that can be used to tackle the hugely demanding data-processing problems encountered in the natural sciences. Application of genetic programming to a problem using parasites as biological tags demonstrates its potential for developing explanatory models using data that are both complex and noisy.

MaleModels Geneticbusiness.industryGenetic programmingBiologyBioinformaticsMachine learningcomputer.software_genreModels BiologicalHost-Parasite InteractionsPerciformesFish DiseasesInfectious DiseasesAnimalsParasitologyFemaleParasitesArtificial intelligenceSelection GeneticbusinesscomputerAlgorithmsPhylogenyEnvironmental MonitoringTrends in parasitology
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Discrimination of fish populations using parasites: Random Forests on a ‘predictable’ host-parasite system

2010

SUMMARYWe address the effect of spatial scale and temporal variation on model generality when forming predictive models for fish assignment using a new data mining approach, Random Forests (RF), to variable biological markers (parasite community data). Models were implemented for a fish host-parasite system sampled along the Mediterranean and Atlantic coasts of Spain and were validated using independent datasets. We considered 2 basic classification problems in evaluating the importance of variations in parasite infracommunities for assignment of individual fish to their populations of origin: multiclass (2–5 population models, using 2 seasonal replicates from each of the populations) and 2…

0106 biological sciencesMediterranean climatePopulation DynamicsPopulation01 natural sciencesHost-Parasite Interactions030308 mycology & parasitologyFish Diseases03 medical and health sciencesMediterranean SeaAnimalsParasite hostingParasites14. Life underwatereducationAtlantic OceanEcosystem0303 health scienceseducation.field_of_studybiologyEcology010604 marine biology & hydrobiologyBoops boopsbiology.organism_classificationPerciformesRandom forestInfectious DiseasesPopulation modelSpainSample size determinationSpatial ecologyAnimal Science and ZoologyParasitologyBiologieAlgorithmsParasitology
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Hematopoietic stem-cell transplantation for advanced systemic mastocytosis

2014

Purpose Advanced systemic mastocytosis (SM), a fatal hematopoietic malignancy characterized by drug resistance, has no standard therapy. The effectiveness of allogeneic hematopoietic stem-cell transplantation (alloHCT) in SM remains unknown. Patients and Methods In a global effort to define the value of HCT in SM, 57 patients with the following subtypes of SM were evaluated: SM associated with clonal hematologic non–mast cell disorders (SM-AHNMD; n = 38), mast cell leukemia (MCL; n = 12), and aggressive SM (ASM; n = 7). Median age of patients was 46 years (range, 11 to 67 years). Donors were HLA-identical (n = 34), unrelated (n = 17), umbilical cord blood (n = 2), HLA-haploidentical (n = 1)…

AdultMaleCancer Researchmedicine.medical_specialtyTransplantation ConditioningAdolescentmedicine.medical_treatmentMedizinDrug resistanceHematopoietic stem cell transplantationMastocytosis SystemicInternal medicinemedicineHumansTransplantation HomologousSystemic mastocytosisChildSurvival rateAgedRetrospective StudiesmastocytosisHematologybusiness.industryRemission InductionHematopoietic Stem Cell TransplantationORIGINAL REPORTSMiddle Agedmedicine.diseaseMast cell leukemia3. Good healthSurvival RateTransplantationSettore MED/15 - MALATTIE DEL SANGUEHaematopoiesisTreatment OutcomeOncologyImmunologyCancer researchFemalebusinesstransplantation
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Event Horizon Telescope observations of the jet launching and collimation in Centaurus A

2021

Full list of authors: Janssen, Michael; Falcke, Heino; Kadler, Matthias; Ros, Eduardo; Wielgus, Maciek; Akiyama, Kazunori; Baloković, Mislav; Blackburn, Lindy; Bouman, Katherine L.; Chael, Andrew; Chan, Chi-kwan; Chatterjee, Koushik; Davelaar, Jordy; Edwards, Philip G.; Fromm, Christian M.; Gómez, José L.; Goddi, Ciriaco; Issaoun, Sara; Johnson, Michael D.; Kim, Junhan; Koay, Jun Yi; Krichbaum, Thomas P.; Liu, Jun; Liuzzo, Elisabetta; Markoff, Sera; Markowitz, Alex; Marrone, Daniel P.; Mizuno, Yosuke; Müller, Cornelia; Ni, Chunchong; Pesce, Dominic W.; Ramakrishnan, Venkatessh; Roelofs, Freek; Rygl, Kazi L. J.; van Bemmel, Ilse; Event Horizon Telescope Collaboration.--This Open Access artic…

AstrofísicaActive galactic nucleusCosmology and Nongalactic Astrophysics (astro-ph.CO)010504 meteorology & atmospheric sciencesEvent horizonastro-ph.GAAstronomyAstrophysics::High Energy Astrophysical PhenomenaAstrophysics - astrophysics of galaxiesAstrophysics - cosmology and nongalactic astrophysicsCentaurus AFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesAstrophysics - high energy astrophysical phenomena0103 physical sciencesVery-long-baseline interferometry010303 astronomy & astrophysicsAstrophysics::Galaxy Astrophysics0105 earth and related environmental sciencesAstronomia ObservacionsEvent Horizon TelescopePhysicsastro-ph.HEHigh Energy Astrophysical Phenomena (astro-ph.HE)Supermassive black holeJet (fluid)Galactic CenterAstronomy and AstrophysicsAstrophysics of Galaxies (astro-ph.GA)astro-ph.CO
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Constraints on black-hole charges with the 2017 EHT observations of M87*

2021

Full list of authors: Kocherlakota, Prashant; Rezzolla, Luciano; Falcke, Heino; Fromm, Christian M.; Kramer, Michael; Mizuno, Yosuke; Nathanail, Antonios; Olivares, Héctor; Younsi, Ziri; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Algaba, Juan Carlos; Anantua, Richard; Asada, Keiichi; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Baloković, Mislav; Barrett, John; Benson, Bradford A.; Bintley, Dan; Blackburn, Lindy; Blundell, Raymond; Boland, Wilfred; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Broguiere, Dominique; Bronzwaer, Thomas; Byun, Do-Young; Carlstrom, John E.; …

PhysicsGravitació010308 nuclear & particles physicsAstronomyKinoAstrophysics::High Energy Astrophysical Phenomenagr-qcChatterjeeFOS: Physical sciencesGeneral Relativity and Quantum Cosmology (gr-qc)Creative commons01 natural sciencesGeneral Relativity and Quantum Cosmology0103 physical sciencesAstronomiaFish <Actinopterygii>010306 general physicsGeneral relativity and quantum cosmologyHumanitiesPhysical Review D. Particles and Fields
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