Results 41 to 50 of about 717,370 (266)
PeerJObjectives Short sleep is becoming more common in modern society. This study aimed to explore the relationship between accelerometer-measured sleep duration and cognitive performance among young adults as well as the underlying hemodynamic mechanisms ...
Yanwei You +5 more
semanticscholar +1 more source
Journal of Clinical Medicine, 2018 For cognitive processes to function well, it is essential that the brain is optimally supplied with oxygen and blood. In recent years, evidence has emerged suggesting that cerebral oxygenation and hemodynamics can be modified with physical activity.
Fabian Herold +3 more
semanticscholar +1 more source
Spectroscopy on nanoparticles without light [PDF]
Phys. Rev. Applied 13, 014025 (2020), 2019 One of the most important tools in modern science is the analysis of electromagnetic properties via spectroscopy. The various types of spectroscopy can be classified by the underlying type of interactions between energy and material. In this paper we demonstrate a new class of spectroscopy based on Casimir interactions between a solid investigated ...
arxiv +1 more source
Neurophotonics, 2020 . Significance: The reliability of functional near-infrared spectroscopy (fNIRS) measurements is reduced by systemic physiology. Short-channel regression algorithms aim at removing systemic “noise” by subtracting the signal measured at a short source ...
Dominik Wyser +5 more
semanticscholar +1 more source
Bundled-Optode Method in Functional Near-Infrared Spectroscopy
PLOS ONE, 2016 In this paper, a theory for detection of the absolute concentrations of oxy-hemoglobin (HbO) and deoxy-hemoglobin (HbR) from hemodynamic responses using a bundled-optode configuration in functional near-infrared spectroscopy (fNIRS) is proposed. The proposed method is then applied to the identification of two fingers (i.e., little and thumb) during ...
Hoang-Dung Nguyen +2 more
openaire +6 more sources
Early-type galaxies in the near-infrared: 1.5-2.4\mum spectroscopy [PDF]
, 2008 Near-infrared (hereafter NIR) data may provide complementary information to the traditional optical population synthesis analysis of unresolved stellar populations because the spectral energy distribution of the galaxies in the 1-2.5\mum range is dominated by different types of stars than at optical wavelengths.
arxiv +1 more source
Direct observation of low frequency confined acoustic phonons in silver nanoparticles: Terahertz time domain spectroscopy [PDF]
J. Chem. Phys. 133, 014502 (2010), 2010 Terahertz time domain spectroscopy has been used to study low frequency confined acoustic phonons of silver nanoparticles embedded in poly(vinyl alcohol) matrix in the spectral range of 0.1 to 2.5 THz. The real and imaginary parts of the dielectric function show two bands at 0.60 THz and 2.12 THz attributed to the spheroidal and toroidal modes of ...
arxiv +1 more source
Scattering Delay Mitigation in High Accuracy Pulsar Timing: Cyclic Spectroscopy Techniques [PDF]
, 2023 We simulate scattering delays from the interstellar medium to examine the effectiveness of three estimators in recovering these delays in pulsar timing data. Two of these estimators use the more traditional process of fitting autocorrelation functions to pulsar dynamic spectra to extract scintillation bandwidths, while the third estimator uses the ...
arxiv +1 more source
Advanced Engineering Materials, EarlyView.The study investigates 3D‐printed polylactic acid (PLA) composites with biodegradable bamboo and jute powder fillers. Mechanical, thermal, structural properties, and rheological behavior are discussed to evaluate composite performance. Morphological characterization indicates uniform dispersion and adhesion of the fillers in the PLA matrix with the ...
Vimukthi Dananjaya +4 more
wiley +1 more source
Simulation of Condensed-Phase Spectroscopy with Near-term Digital Quantum Computer [PDF]
arXiv, 2021 Spectroscopy is an indispensable tool in understanding the structures and dynamics of molecular systems. However computational modelling of spectroscopy is challenging due to the exponential scaling of computational complexity with system sizes unless drastic approximations are made.
arxiv