Results 51 to 60 of about 1,272,560 (299)

Rapid Bioassessment Protocols Using Aquatic Macroinvertebrates in Africa–Considerations for Regional Adaptation of Existing Biotic Indices

open access: yesFrontiers in Water, 2021
Benthic macroinvertebrates are commonly used to assess water quality and ecological condition of aquatic ecosystems and they form the basis of several biotic indices. Many of these biotic indices are based on rapid bioassessment protocols (RBP).
Helen F. Dallas, Helen F. Dallas
doaj   +1 more source

New perspectives in human movement variability [PDF]

open access: yes, 2013
Movement variability is defined as the normal variations that occur in motor performance across multiple repetitions of a task.2 Bernstein1 described movement variability quite eloquently as ‘‘repetition without repetition.’’ Traditionally, movement ...
Lockhart, Thurmon, Stergiou, Nick
core   +3 more sources

A Framework for RF-EMF Time Series Analysis Through Multi-Scale Time Averaging

open access: yesIEEE Access
Five European systems for continuous monitoring of outside radio-frequency (RF) electromagnetic field (EMF) provide important insights into the long-term in situ variability of RF-EMF, as a valuable feature for accessing RF-EMF in areas with increased ...
Nikola Djuric   +4 more
doaj   +1 more source

Workflow to Establish Time-Specific Zones in Precision Agriculture by Spatiotemporal Integration of Plant and Soil Sensing Data

open access: yesAgronomy, 2018
Management zones (MZs) are used in precision agriculture to diversify agronomic management across a field. According to current common practices, MZs are often spatially static: they are developed once and used thereafter.
Elia Scudiero   +5 more
doaj   +1 more source

Magnetic variability in the young solar analog KIC 10644253: Observations from the Kepler satellite and the HERMES spectrograph [PDF]

open access: yes, 2016
The continuous photometric observations collected by the Kepler satellite over 4 years provide a whelm of data with an unequalled quantity and quality for the study of stellar evolution of more than 200000 stars.
Ballot, J.   +14 more
core   +5 more sources

Extreme signal amplitude events in neuromagnetic oscillations reveal brain aging processing across adulthood

open access: yesFrontiers in Aging Neuroscience
IntroductionNeurophysiological activity, as noninvasively captured by electro- and magnetoencephalography (EEG and MEG), demonstrates complex temporal fluctuations approximated by typical variations around the mean values and rare events with large ...
Vasily A. Vakorin   +4 more
doaj   +1 more source

Acquired Dysarthria within the Context of the Four-level Framework of Speech Sensorimotor Control

open access: yesSouth African Journal of Communication Disorders, 2007
The Four-Level Framework of speech sensorimotor control (Van der Merwe, 1997) complicates the traditional view of dysarthria as a purely motor execution disorder.
Alexandra Stipinovich   +1 more
doaj   +1 more source

Extraction of Concealed Features From RF-EMF Monitoring at Kindergartens and Schools

open access: yesIEEE Access
Modern electromagnetic field (EMF) monitoring networks, such as the Serbian EMF RATEL network, are based on continuous EMF monitoring and offer daily observation of EMF levels in areas where people can reside for many hours a day and, consequently ...
Nikola Djuric   +4 more
doaj   +1 more source

Variability of Acoustically Evidenced Methane Bubble Emissions Offshore Western Svalbard

open access: yesGeophysical Research Letters, 2019
Large reservoirs of methane present in Arctic marine sediments are susceptible to rapid warming, promoting increasing methane emissions. Gas bubbles in the water column can be detected, and flow rates can be quantified using hydroacoustic survey methods,
Mario E. Veloso‐Alarcón   +8 more
doaj   +1 more source

Prompt Optical Emission from Gamma-ray Bursts with Non-single Timescale Variability of Central Engine Activities

open access: yes, 2013
The complete high-resolution lightcurves of Swift GRB 080319B present an opportunity for detailed temporal analysis of the prompt optical emission. With a two-component distribution of initial Lorentz factors, we simulate the dynamical process of the ...
Li, Zhuo, Xu, Si-Yao
core   +1 more source

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