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Biophotons: New Experimental Data and Analysis (open access)

Biophotons: New Experimental Data and Analysis

Article describes how biophotons are an ultra-weak emission of photons in the visible energy range from living matter. The authors study the emission from germinating seeds using an experimental technique designed to detect light of extremely small intensity.
Date: October 10, 2023
Creator: Benfatto, Maurizio; Pace, Elisabetta; Davoli, Ivan; Francini, Roberto; Matteis, Fabio De; Scordo, Alessandro et al.
System: The UNT Digital Library
Exploratory X-Ray Monitoring of Luminous Radio-quiet Quasars at High Redshift: No Evidence for Evolution in X-Ray Variability (open access)

Exploratory X-Ray Monitoring of Luminous Radio-quiet Quasars at High Redshift: No Evidence for Evolution in X-Ray Variability

This article reports on the second installment of an X-ray monitoring project of seven luminous radio-quiet quasars (RQQs).
Date: October 10, 2017
Creator: Shemmer, Ohad; Brandt, William Nielsen; Paolillo, Maurizio; Kaspi, Shai; Vignali, Christian; Lira, Paulina et al.
System: The UNT Digital Library
Tuning the decay of sound in a viscous metamaterial (open access)

Tuning the decay of sound in a viscous metamaterial

Authors of the article use analytical results for viscous dissipation in phononic crystals to calculate the decay coefficient of a sound wave propagating at low frequencies through a two-dimensional phononic crystal with a viscous fluid background. They claim that the decay coefficient exhibits dependence on the direction of propagation; that is, a homogenized phononic crystal behaves like an anisotropic viscous fluid.
Date: October 10, 2022
Creator: Ibarias, M.; Doporto, J.; Krokhin, Arkadii A. & Arriaga, J.
System: The UNT Digital Library