Results 91 to 100 of about 56,774 (290)
Forest vegetation Interaction with L-band Satellite Signals
E3S Web of Conferences, 2019 A method for calculating the electro-physical parameters of forest vegetation cover interacting with the signals of navigation satellites in the frequency bands 1.2-1.6 GHz is proposed.
Podoprigora Vladimir, Sorokin Anatoly
doaj +1 more source
Radiation Protection and Environment, 2019 An attempt has been made to prepare the nonlead-based gamma shielding materials by adding different weight percentages (0%, 10%, 20%, and 40%) of bismuth in high-density polyethylene (HDPE) matrix.
M Sheela +3 more
doaj +1 more source
Arthritis Care &Research, EarlyView.Objective To evaluate how modifiable psychosocial factors and fatigue relate to physical functioning in patients with systemic lupus erythematosus (SLE). Methods In this cross‐sectional study of two demographically distinct cohorts (Approaches to Positive, Patient‐Centered Experiences of Aging with Lupus [APPEAL] and California Lupus Epidemiology Study
Mrinalini Dey +8 more
wiley +1 more source
Arthritis Care &Research, EarlyView.Systemic sclerosis (SSc) is a rare autoimmune disease defined by immune dysregulation, vasculopathy, and progressive fibrosis of the skin and internal organs. Despite advances in care, major complications such as interstitial lung disease (ILD) and myocardial involvement remain the leading causes of morbidity and mortality.
Cristiana Sieiro Santos +2 more
wiley +1 more source
PET attenuation coefficients from CT images: experimental evaluation of the transformation of CT into PET 511-keV attenuation coefficients [PDF]
, 2002 The CT data acquired in combined PET/CT studies provide a fast and essentially noiseless source for the correction of photon attenuation in PET emission data. To this end, the CT values relating to attenuation of photons in the range of 40-140keV must be
Burger, C +5 more
core +1 more source
Advanced Engineering Materials, EarlyView.This study presents an infrared monitoring approach for direct laser interference patterning (DLIP) combined with a convolutional neural network (CNN). Thermal emission data captured during structuring are used to predict surface topography parameters.
Lukas Olawsky +5 more
wiley +1 more source
Determination of the linear attenuation coefficients of aluminum, iron and lead for collimated 661.66 keV gamma rays using TCS-172 gamma scintillation survey meter [PDF]
The linear attenuation coefficients of aluminum (Al), iron (Fe), and lead (Pb) for 661.66 keV gamma rays were determined based on gamma dose rate measurements obtained using a handheld TCS-172 gamma scintillation survey meter.
Trịnh, Thị Tú Anh +1 more
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Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
On the calculation of an attenuation coefficient for transects of ice-covered ocean
, 2011 Published online 24 August 2011Exponential attenuation of ocean surface waves in ice-covered regions of the polar seas is modelled in a two-dimensional, linear setting, assuming that the sea ice behaves as a thin-elastic plate. Attenuation is produced by
Bennetts, L. +3 more
core +1 more source
Itararé Group Sandstone as a Sustainable Alternative Material for Photon Radiation Shielding
Applied SciencesThe materials typically used for radiation shielding include lead, concrete, and polymers. However, some of these materials can be toxic or very expensive to produce.
Gabrielli W. Pietralla +2 more
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