Results 41 to 50 of about 3,268,285 (233)

Fast Characterization of Dispersion and Dispersion Slope of Optical Fiber Links using Spectral Interferometry with Frequency Combs [PDF]

open access: yes, 2009
We demonstrate fast characterization (~1.4 microseconds) of both the dispersion and dispersion slope of long optical fiber links (~25 km) using dual quadrature spectral interferometry with an optical frequency comb.
Leaird, Daniel E.   +3 more
core   +1 more source

Estimating growth parameters and growth variability from length frequency data using hierarchical mixture models [PDF]

open access: yesICES Journal of Marine Science, 2019
AbstractAnalysis of length frequency distributions from surveys is one well-known method for obtaining growth parameter estimates where direct age estimates are not available. We present a likelihood-based procedure that uses mixture models and the expectation–maximization algorithm to estimate growth parameters from length frequency data (LFEM).
Luke Batts   +3 more
openaire   +1 more source

Biometry of Seeds of Jatropha mollissima (Pohl) Baill. and Cnidoscolus urens (L.) Arthur (Euphorbiaceae) from Different Matrices in the Semi-Arid Region of Brazil

open access: yesBrazilian Archives of Biology and Technology, 2023
This study aimed to evaluate the biometric characteristics of seeds of Jatropha mollissima (Pohl) Baill. and Cnidoscolus urens (L.) Arthur from different matrices in the semi-arid region of Brazil.
Maria Pereira de Araújo   +4 more
doaj   +1 more source

A Hybrid Brain-Computer Interface Based on Visual Evoked Potential and Pupillary Response

open access: yesFrontiers in Human Neuroscience, 2022
Brain-computer interface (BCI) based on steady-state visual evoked potential (SSVEP) has been widely studied due to the high information transfer rate (ITR), little user training, and wide subject applicability. However, there are also disadvantages such
Lu Jiang   +8 more
doaj   +1 more source

Operating LISA as a Sagnac interferometer

open access: yes, 2003
A phase-locking configuration for LISA is proposed that provides a significantly simpler mode of operation. The scheme provides one Sagnac signal readout inherently insensitive to laser frequency noise and optical bench motion for a non-rotating LISA ...
Shaddock, Daniel A.
core   +1 more source

Annual growth and age composition of the squat lobster Cervimunida johni off northern-central Chile (1996-97)

open access: yesScientia Marina, 2005
The MULTIFAN method was used to analyse a series of monthly length-frequency distributions of the squat lobster Cervimunida johni Porter (1903) (Galatheidae), for the estimation of growth and age composition in the fishing area off Coquimbo (29°59’S-71 ...
Hugo Arancibia   +2 more
doaj   +1 more source

Observational evidence of resonantly damped propagating kink waves in the solar corona

open access: yes, 2010
In this Letter we establish clear evidence for the resonant absorption damping mechanism by analyzing observational data from the novel Coronal Multi-Channel Polarimeter (CoMP).
Aschwanden   +10 more
core   +1 more source

Besøk på sykehjem. En kvantitativ studie av sykehjemsbeboeres besøkshyppighet

open access: yesNordisk Tidsskrift for Helseforskning, 2018
Social contact is essential for the well-being of the nursing home residents.Visiting frequency in nursing homes is rarely investigated. The purpose of this study was to map the number of visits for nursing home residents. Nursing students collected data
Joanna Galek   +3 more
doaj   +1 more source

Deep Convolutional Neural Network Based Interictal-Preictal Electroencephalography Prediction: Application to Focal Cortical Dysplasia Type-II

open access: yesFrontiers in Neurology, 2020
We aimed to differentiate between the interictal and preictal states in epilepsy patients with focal cortical dysplasia (FCD) type-II using deep learning-based classifiers based on intracranial electroencephalography (EEG).
Yoon Gi Chung   +6 more
doaj   +1 more source

Using length-frequency data to elucidate the population dynamics ofArgulus foliaceus(Crustacea: Branchiura)

open access: yesParasitology, 2009
SUMMARYThis study uses a novel method for discriminating cohorts and investigating the population dynamics of the parasitic crustacean,Argulus foliaceus. Analysis of parasite length-frequency data was carried out in order to elucidate the timings and drivers behind the parasite's life cycle.
N G H, Taylor   +2 more
openaire   +2 more sources

Home - About - Disclaimer - Privacy