Mass density and size estimates for spiral galaxies using general relativity
Sign Up to like & getrecommendations! Published in 2017 at "Astrophysics and Space Science"
DOI: 10.1007/s10509-017-3179-8
Abstract: Rotation curves of spiral galaxies reveal a physical phenomenon that has been seen to lack a satisfactory scientific explanation: velocities of stars far from the nucleus are high and approximately constant. In the context of… read more here.
Keywords: matter; general relativity; mass density; density ... See more keywords
Dynamics of spatial heterogeneity in a landfill with interacting phase densities: a stochastic analysis
Sign Up to like & getrecommendations! Published in 2017 at "Applied Mathematical Modelling"
DOI: 10.1016/j.apm.2016.08.026
Abstract: A landfill represents a complex and dynamically evolving structure that can be stochastically perturbed by exogenous factors. Both thermodynamic (equilibrium) and time varying (non-steady state) properties of a landfill are affected by spatially heterogenous and… read more here.
Keywords: dynamics spatial; mass density; mass; time ... See more keywords
Damage identification under uncertain mass density distributions
Sign Up to like & getrecommendations! Published in 2021 at "Computer Methods in Applied Mechanics and Engineering"
DOI: 10.1016/j.cma.2021.113672
Abstract: Abstract Nondestructive damage identification is a central task, for example, in aeronautical, civil and naval engineering. The identification approaches based on (physical) models rely on the predictive accuracy of the forward model, and typically suffer… read more here.
Keywords: damage identification; mass density; uncertain mass; identification ... See more keywords
Active feedback control of effective mass density and sound transmission on elastic wave metamaterials
Sign Up to like & getrecommendations! Published in 2021 at "International Journal of Mechanical Sciences"
DOI: 10.1016/j.ijmecsci.2020.106221
Abstract: Abstract With the active feedback control system on elastic wave metamaterials, this research is concentrated on the effective mass density and sound transmission by a harmonic incident sound pressure. The elastic wave metamaterials consist of… read more here.
Keywords: elastic wave; control; effective mass; mass density ... See more keywords
Phononic wave hard limiter
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Sound and Vibration"
DOI: 10.1016/j.jsv.2018.11.031
Abstract: Abstract In this paper nonlinear Schrodinger equation (NSE) is proposed to evaluate phononic wave propagation in nonlinear media regarding mass density as the fundamental parameter of nonlinearity. This equation is used to analyze the phononic… read more here.
Keywords: phononic wave; hard limiter; wave; mass density ... See more keywords
Direct experimental evidences of the density variation of ultrathin polymer films with thickness
Sign Up to like & getrecommendations! Published in 2021 at "Polymer"
DOI: 10.1016/j.polymer.2021.123934
Abstract: Abstract Beyond the peculiar glass transition temperature (Tg) studied extensively for over two decades, we have investigated in this work the variation of the mass density of polymer thin films, a key property barely put… read more here.
Keywords: variation; density; thickness; mass density ... See more keywords
Chemistry and mass density of aluminum hydroxide gel in eco-cements by ptychographic X-ray computed tomography
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Physical Chemistry C"
DOI: 10.1021/acs.jpcc.6b10048
Abstract: Eco-cements are a desirable alternative to ordinary Portland cements because of their lower CO2 footprints. Some ye’elimite-based eco-cements are attracting a lot of interest. Understanding the reasons for the mechanical performances requires the characterization of… read more here.
Keywords: chemistry; mass density; eco cements; gel ... See more keywords
Optical Measurement of the Mass Density of Biological Samples
Sign Up to like & getrecommendations! Published in 2025 at "ACS Photonics"
DOI: 10.1021/acsphotonics.5c01861
Abstract: Mass density is a vital property for the improved biophysical understanding of and within biological samples. It is increasingly attracting active investigations, but still lacks reliable, noncontact techniques to accurately characterize it in biological systems.… read more here.
Keywords: mass density; biological samples; mass; measurement mass ... See more keywords
The Changing Eigenfrequency Continuum During Geomagnetic Storms: Implications for Plasma Mass Dynamics and ULF Wave Coupling
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Geophysical Research"
DOI: 10.1029/2019ja027648
Abstract: Geomagnetic storms are one of the most energetic space weather phenomena. Previous studies have shown that the eigenfrequencies of ultralow frequency (ULF) waves on closed magnetic field lines in the inner magnetosphere decrease during storm… read more here.
Keywords: plasma mass; mass; mass density; geomagnetic storms ... See more keywords
Upper‐Atmosphere Mass Density Variations From CASSIOPE Precise Orbits
Sign Up to like & getrecommendations! Published in 2021 at "Space Weather"
DOI: 10.1029/2020sw002645
Abstract: Thermospheric mass density (TMD) measurements are invaluable to accurately estimate and predict the position and velocity of orbiting objects in Low Earth Orbit (LEO). Existing observational methods and predictive models have some problems (e.g., accuracy,… read more here.
Keywords: precise orbits; mass density; tmd variations; variations cassiope ... See more keywords
Machine Learning Based Modeling of Thermospheric Mass Density
Sign Up to like & getrecommendations! Published in 2024 at "Space Weather"
DOI: 10.1029/2023sw003844
Abstract: In this study, we propose a machine learning based approach to construct an empirical model of thermospheric mass densities, based on the MultiLayer Perceptron and bi‐directional Long Short‐Term Memory for ensemble learning model (MBiLE). The… read more here.
Keywords: mass density; mbile model; model; thermospheric mass ... See more keywords