Results 31 to 40 of about 17,400 (155)

Functional Analysis of Continuous, High-Resolution Measures in Aging Research: A Demonstration Using Cerebral Oxygenation Data From the Irish Longitudinal Study on Aging

Frontiers in Human Neuroscience, 2020
Background: A shift towards the dynamic measurement of physiologic resilience and improved technology incorporated into experimental paradigms in aging research is producing high-resolution data.
John D. O’Connor, Matthew D. L. O’Connell, Matthew D. L. O’Connell, Roman Romero-Ortuno, Roman Romero-Ortuno, Belinda Hernández, Louise Newman, Richard B. Reilly, Rose Anne Kenny, Silvin P. Knight   +9 more
doaj   +1 more source

Time-Varying Functional Principal Components for Non-Stationary EpCO$$_2$$ in Freshwater Systems

Journal of Agricultural Biological and Environmental Statistics, 2022
Outgassing of carbon dioxide (CO$$_2$$ 2 ) from river surface waters, estimated using partial pressure of dissolved CO$$_2$$ 2 , has recently been considered an important component of the global carbon budget.
A. Elayouty, M. Scott, Claire Miller
semanticscholar   +1 more source

Functional Analysis for Habitat Mapping in a Special Area of Conservation Using Sentinel-2 Time-Series Data

Remote Sensing, 2022
The mapping and monitoring of natural and semi-natural habitats are crucial activities and are regulated by European policies and regulations, such as the 92/43/EEC. In the Mediterranean area, which is characterized by high vegetational and environmental
Simone Pesaresi, Adriano Mancini, Giacomo Quattrini, Simona Casavecchia   +3 more
doaj   +1 more source

Tutorial on Bayesian Functional Regression Using Stan. [PDF]

Stat Med
ABSTRACT This manuscript provides step‐by‐step instructions for implementing Bayesian functional regression models using Stan. Extensive simulations indicate that the inferential performance of the methods is comparable to that of state‐of‐the‐art frequentist approaches.
Jiang Z, Crainiceanu C, Cui E.
europepmc   +2 more sources

Exploring functional data analysis and wavelet principal component analysis on ecstasy (MDMA) wastewater data

BMC Medical Research Methodology, 2016
Background Wastewater-based epidemiology (WBE) is a novel approach in drug use epidemiology which aims to monitor the extent of use of various drugs in a community.
Stefania Salvatore, Jørgen G. Bramness, Jo Røislien   +2 more
doaj   +1 more source

Application and interpretation of functional data analysis techniques to differential scanning calorimetry data from lupus patients. [PDF]

PLoS ONE, 2017
DSC is used to determine thermally-induced conformational changes of biomolecules within a blood plasma sample. Recent research has indicated that DSC curves (or thermograms) may have different characteristics based on disease status and, thus, may be ...
Sarah K Kendrick, Qi Zheng, Nichola C Garbett, Guy N Brock   +3 more
doaj   +1 more source

Functional quantile principal component analysis. [PDF]

Biostatistics
This paper introduces functional quantile principal component analysis (FQPCA), a dimensionality reduction technique that extends the concept of functional principal components analysis (FPCA) to the examination of participant-specific quantiles curves ...
Méndez-Civieta Á, Wei Y, Diaz KM, Goldsmith J.   +3 more
europepmc   +2 more sources

Looking for Synergies in Healthy Upper Limb Motion: A Focus on the Wrist

IEEE Transactions on Neural Systems and Rehabilitation Engineering, 2023
Recent studies on human upper limb motion highlighted the benefit of dimensionality reduction techniques to extrapolate informative joint patterns.
F. Masiero, I. Fagioli, L. Truppa, A. Mannini, L. Cappello, M. Controzzi   +5 more
doaj   +1 more source

Tracking the New Zealand English NEAR/SQUARE Merger Using Functional Principal Components Analysis

Interspeech, 2019
Copyright © 2019 ISCA The focus of the study is the application of functional principal components analysis (FPCA) to a sound change in progress in which the SQUARE and NEAR falling diphthongs are merging in New Zealand English.
M. Gubian, J. Harrington, M. Stevens, F. Schiel, P. Warren   +4 more
semanticscholar   +1 more source

Sociodemographic, Health and Lifestyle, Sampling, and Mental Health Determinants of 24-Hour Motor Activity Patterns: Observational Study

Journal of Medical Internet Research, 2021
BackgroundAnalyzing actigraphy data using standard circadian parametric models and aggregated nonparametric indices may obscure temporal information that may be a hallmark of the circadian impairment in psychiatric disorders.
Difrancesco, Sonia, Riese, Harriëtte, Merikangas, Kathleen R, Shou, Haochang, Zipunnikov, Vadim, Antypa, Niki, van Hemert, Albert M, Schoevers, Robert A, Penninx, Brenda W J H, Lamers, Femke   +9 more
doaj   +1 more source