Search results for "Linear Models"

showing 10 items of 440 documents

ERP denoising in multichannel EEG data using contrasts between signal and noise subspaces

2009

Abstract In this paper, a new method intended for ERP denoising in multichannel EEG data is discussed. The denoising is done by separating ERP/noise subspaces in multidimensional EEG data by a linear transformation and the following dimension reduction by ignoring noise components during inverse transformation. The separation matrix is found based on the assumption that ERP sources are deterministic for all repetitions of the same type of stimulus within the experiment, while the other noise sources do not obey the determinancy property. A detailed derivation of the technique is given together with the analysis of the results of its application to a real high-density EEG data set. The inter…

Underdetermined systemNoise reductionInverseElectroencephalographyDyslexiaEvent-related potentialmedicineHumansChildEvoked PotentialsMathematicsLanguage Testsmedicine.diagnostic_testbusiness.industryGeneral NeuroscienceDimensionality reductionBrainElectroencephalographySignal Processing Computer-AssistedPattern recognitionLinear subspaceLinear mapAcoustic StimulationData Interpretation StatisticalLinear ModelsSpeech PerceptionArtificial intelligenceArtifactsbusinessAlgorithmsSoftwareJournal of Neuroscience Methods
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The VFR Phenomenon in Italy

2015

The collection is the first book to explore research on visiting friends and relatives (VFR). In assembling an international collection of quality VFR-related research the editors present the profiles, characteristics, opportunities and behaviours of VFR travel for the benefit of researchers, industry practitioners and educators. This chapter discusses the characteristics of the phenomenon in Italy, by analysing official data as well as data drawn from purpose research.

VFR Tourism Italy Sicily Log-linear models.Settore SECS-S/05 - Statistica Sociale
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MM3-ELISA evaluation of coproantigen release and serum antibody production in sheep experimentally infected with Fasciola hepatica and F. gigantica.

2008

During an experimental infection of sheep with Fasciola hepatica or F. gigantica, MM3-SERO and MM3-COPRO ELISA tests were applied to compare the kinetics of antibody production and coproantigen release between the 2nd and 32nd week post-infection (wpi). The Kato-Katz technique was used to measure the kinetics of egg shedding by both Fasciola species (eggs per gram of feces, epg). The kinetics of IgG antibodies for all sheep infected with F. hepatica and F. gigantica followed a similar pattern. Optical density (OD) increased rapidly between the 4th until the 12th wpi, when the highest values were reached and then decreased slowly until the 32nd wpi. Coproantigen levels increased above the cu…

Veterinary medicineFascioliasisFasciola giganticaAntibodies HelminthSheep DiseasesEnzyme-Linked Immunosorbent AssayStatistics NonparametricFecesRandom AllocationHepaticaparasitic diseasesParasite Egg CountFasciola hepaticaHelminthsAnimalsParasite Egg CountEggs per gramFecesSheepGeneral VeterinaryFasciolabiologyAntibodies MonoclonalGeneral MedicineFasciola hepaticabiology.organism_classificationVirologyFasciolaKineticsAntigens HelminthImmunoglobulin GAntibody FormationLinear ModelsParasitologyVeterinary parasitology
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Peak dispersion in gradient elution: An insight based on the plate model.

2020

Gradient elution in liquid chromatography reduces the analysis time, improves the efficiency and increases the peak capacity. The study of this chromatographic mode has been based mainly on kinetic dispersion models. The plate model has been applied to a lesser extent, despite being the basis for the concepts of plate height and chromatographic efficiency. In this work, a general equation describing peak dispersion in HPLC gradient elution is derived from the plate model. This equation is studied and validated for three types of gradients: (i) a reference gradient without ramp in which the retention factor varies with time identically throughout the column, (ii) a gradient of stationary pha…

Work (thermodynamics)Differential equation010402 general chemistryKinetic energy01 natural sciencesBiochemistryHigh-performance liquid chromatographyAnalytical ChemistryPressureChromatography High Pressure LiquidChromatographyChemistryElution010401 analytical chemistryOrganic ChemistryGeneral MedicineMechanicsCompression (physics)0104 chemical sciencesKineticsModels ChemicalLinear ModelsSolventsIndicators and ReagentsDispersion (chemistry)Constant (mathematics)Journal of chromatography. A
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Translocation time of periodically forced polymer chains.

2010

6 páginas, 11 figuras.-- PACS number(s): 36.20.-r, 05.40.-a, 87.15.A-, 87.10.-e

Work (thermodynamics)PeriodicityQuantitative Biology - Subcellular ProcessesTime FactorsPolymersGaussianThermal fluctuationsFOS: Physical sciencesChromosomal translocationCondensed Matter - Soft Condensed MatterNoise (electronics)SynchronizationQuantitative Biology::Subcellular Processessymbols.namesakeMotionNanotechnologyStatistical physicsPhysics - Biological PhysicsScalingSubcellular Processes (q-bio.SC)MathematicsPhysics::Biological PhysicsQuantitative Biology::BiomoleculesCondensed matter physicsTemperatureFunction (mathematics)Biological Physics (physics.bio-ph)FOS: Biological sciencessymbolsLinear ModelsSoft Condensed Matter (cond-mat.soft)Physical review. E, Statistical, nonlinear, and soft matter physics
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Manipulative parasites may not alter intermediate host distribution but still enhance their transmission: field evidence for increased vulnerability …

2013

SUMMARYBehavioural alterations induced by parasites in their intermediate hosts can spatially structure host populations, possibly resulting in enhanced trophic transmission to definitive hosts. However, such alterations may also increase intermediate host vulnerability to non-host predators. Parasite-induced behavioural alterations may thus vary between parasite species and depend on each parasite definitive host species. We studied the influence of infection with 2 acanthocephalan parasites (Echinorhynchus truttae and Polymorphus minutus) on the distribution of the amphipod Gammarus pulex in the field. Predator presence or absence and predator species, whether suitable definitive host or …

[ SDV.MP.PAR ] Life Sciences [q-bio]/Microbiology and Parasitology/ParasitologyFood ChainZoologyPredationAcanthocephalaHost-Parasite InteractionsEscape Reaction[ SDV.EE.IEO ] Life Sciences [q-bio]/Ecology environment/SymbiosisParasite hostingAnimalsAmphipodaEchinorhynchus truttaePredatorTrophic levelPopulation Density[ SDE.BE ] Environmental Sciences/Biodiversity and EcologybiologyBehavior AnimalHost (biology)EcologyIntermediate hostFishesintermediate host manipulationtrophic transmissionbiology.organism_classificationDietGammarus pulexInfectious DiseasesPulexLinear ModelsPolymorphus minutusAnimal Science and ZoologyParasitologyhost distributionHelminthiasis Animal
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Perceived Burden among Spouse, Adult Child and Parent Caregivers

2018

adult child caregivernursingperceived caregiver burdenomaishoitajattyön kuormittavuuscaregivingparent caregiveromaishoitokoettu hyvinvointispouse caregivergeneral linear models
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Prevalence and factors associated with circadian blood pressure patterns in hypertensive patients.

2009

Comment in Timing of antihypertensive therapy and circadian blood pressure pattern. [Hypertension. 2009] Timing of antihypertensive therapy and circadian blood pressure pattern. Almirall J, Martínez-Ocaña JC, Comas L. Hypertension. 2009 Jun; 53(6):e41; author reply e42. Epub 2009 May 4. Dipping comes of age: the importance of nocturnal blood pressure. [Hypertension. 2009]. Dipping comes of age: the importance of nocturnal blood pressure. O'Brien E. Hypertension. 2009 Mar; 53(3):446-7. Epub 2009 Jan 26.Nondipping in patients with hypertension. [Hypertension. 2009] Ambulatory blood pressure (BP) monitoring has become useful in the diagnosis and management of hypertensive individuals. In addit…

cardiovascular risk factorsMale:Chemicals and Drugs::Chemical Actions and Uses::Pharmacologic Actions::Therapeutic Uses::Cardiovascular Agents::Antihypertensive Agents [Medical Subject Headings]Blood Pressure:Named Groups::Persons::Age Groups::Adult::Middle Aged [Medical Subject Headings]:Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Primates::Haplorhini::Catarrhini::Hominidae::Humans [Medical Subject Headings]Cohort Studiescircadian blood pressure patternFactores de riesgo cardiovascularPrevalenceRegistries:Analytical Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Data Collection::Vital Statistics::Morbidity::Prevalence [Medical Subject Headings]:Geographicals::Geographic Locations::Europe::Spain [Medical Subject Headings]Blood Pressure Monitoring AmbulatoryMiddle AgedCircadian Rhythm:Phenomena and Processes::Physiological Phenomena::Chronobiology Phenomena::Periodicity::Circadian Rhythm [Medical Subject Headings]AmbulatoryHypertension:Analytical Diagnostic and Therapeutic Techniques and Equipment::Diagnosis::Diagnostic Techniques and Procedures::Monitoring Physiologic::Monitoring Ambulatory::Blood Pressure Monitoring Ambulatory [Medical Subject Headings]CardiologyFemaleCohort studyAdultmedicine.medical_specialtyAmbulatory blood pressurenocturnal blood pressure dip:Check Tags::Male [Medical Subject Headings]:Diseases::Cardiovascular Diseases::Vascular Diseases::Hypertension [Medical Subject Headings]Diabetes mellitusInternal medicine:Phenomena and Processes::Circulatory and Respiratory Physiological Phenomena::Cardiovascular Physiological Phenomena::Hemodynamics::Blood Pressure [Medical Subject Headings]:Named Groups::Persons::Age Groups::Adult [Medical Subject Headings]Internal MedicinemedicineHumansCircadian rhythm:Named Groups::Persons::Age Groups::Adult::Aged [Medical Subject Headings]:Analytical Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Statistics as Topic::Models Statistical::Linear Models [Medical Subject Headings]Risk factorAntihypertensive AgentsAgedbusiness.industrymedicine.diseaseObesitySurgerycircadianBlood pressure:Check Tags::Female [Medical Subject Headings]Spain:Analytical Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Epidemiologic Study Characteristics as Topic::Epidemiologic Studies::Cohort Studies [Medical Subject Headings]Linear Models:Analytical Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Data Collection::Registries [Medical Subject Headings]businessHypertension (Dallas, Tex. : 1979)
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Asymptomatic carotid lesions add to cardiovascular risk prediction.

2010

AIM To show that subclinical atherosclerosis (subclinical-ATS) of carotid arteries [intima-media thickness (IMT) or asymptomatic carotid plaque (ACP)], may provide additional information for risk stratification, in asymptomatic patients, aged greater than 45 years, with a cluster of risk factors (RFs). METHODS AND RESULTS We studied 558 asymptomatic patients (235 males). RFs for atherosclerosis were assessed and the 10-year-risk was calculated according to the Italian risk score. Doppler ultrasound of carotid arteries identified the presence of IMT greater than 0.9 mm in 183 patients and ACP in 147 patients. One hundred and fifty-three patients developed cerebrovascular or cardiovascular (C…

cardiovascular riskCarotid Artery DiseasesMalemedicine.medical_specialtyPercutaneousEpidemiologymedicine.medical_treatmentRevascularizationAsymptomaticRisk AssessmentSeverity of Illness IndexAnginalesionAsymptomatic carotid lesionsRisk FactorsInternal medicinemedicineOdds RatioHumanscardiovascular diseasesMyocardial infarctionAgedProportional Hazards ModelsFramingham Risk Scorebusiness.industryIncidence (epidemiology)Ultrasonography DopplerMiddle Agedmedicine.diseasePrognosisSettore MED/11 - Malattie Dell'Apparato CardiovascolarecarotidIntima-media thicknessItalyCardiovascular DiseasesAsymptomatic DiseasesCardiologyLinear ModelsFemalemedicine.symptomCardiology and Cardiovascular MedicinebusinessEuropean journal of cardiovascular prevention and rehabilitation : official journal of the European Society of Cardiology, Working Groups on EpidemiologyPrevention and Cardiac Rehabilitation and Exercise Physiology
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Northward range expansion requires synchronization of both overwintering behaviour and physiology with photoperiod in the invasive Colorado potato be…

2014

Abstract. Photoperiodic phenological adaptations are prevalent in many organisms living in seasonal environments. As both photoperiod and growth season length change with latitude, species undergoing latitudinal range expansion often need to synchronize their life cycle with a changing photoperiod and growth season length. Since adaptive synchronization often involves a large number of time-consuming genetic changes, behavioural plasticity might be a faster way to adjust to novel conditions. We compared behavioural and physiological traits in overwintering (diapause) preparation in three latitudinally different European Colorado potato beetle (Leptinotarsa decemlineata) populations reared u…

coleopteraRange (biology)AcclimatizationPhotoperiodPopulationDiapauseEnvironmentDiapause InsectAnimalseducationLeptinotarsaEcology Evolution Behavior and SystematicsOverwinteringphotoperiodismeducation.field_of_studymetabolic ratebiologyBehavior AnimalEcologyPhenologyColorado potato beetlelatitudebiology.organism_classificationColeopteraEuropediapauseLinear Modelsbehavioural plasticitySeasonsIntroduced SpeciesAnimal Distribution
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