Results 131 to 140 of about 56,774 (290)

A Study of Gamma Ray Total Attenuation and Photo Absorption Coefficient in Different Elements

, 2006
The study intends to measure the transmission of gamma rays such as 137Cs, through Aluminium, Iron, Nickel, Copper, Tin, and lead absorbers using gamma ray spectroscopy techniques.
Assefa, Dilbetigle
core  

Investigation of chemical composition and moisture content for different materials on the attenuation of γ rays

, 2017
In the present work, materials, namely mud, sand mud, ferruginous sandstone and sandstone with different densities are used to evaluate the effect of chemical composition and moisture content on the self-attenuation coefficient factor at γ-energy range ...
Moustafa A. Hilal, Mohamed F. Attallah
core   +1 more source

Digitizing the Filtration Interface: A Smart, Modular Janus Wood Platform for Self‐Reporting Oil/Water Remediation

Advanced Functional Materials, EarlyView.
This work developed a smart Janus wood membrane integrating asymmetric wettability with built‐in electrical sensing for oil‐water separation. The membrane achieved > 99.5% separation efficiency and high flux by leveraging wood's natural anisotropic pore structure.
Kaiwen Chen, Cheng Hao, Wenjuan Zhao, Haonan Zhang, Yujing Tan, Fengze Sun, Xuewen Han, Hui Peng, Tianyi Zhan, Jianxiong Lyu, Ning Yan   +10 more
wiley   +1 more source

Observations and modelling of the variability of the Solent-Southampton Water estuarine system

, 2008
Understanding the effect of physical forcing on estuarine functioning is of major importance to determine the rate of exchange of water, sediments, pollutants and nutrients between the continent and the ocean.
Levasseur, Anne
core  

Dye‐Initiated Chirped Cholesteric Polymer Networks Exhibiting Broadband Dissipative Chiral Photonic Bands

Advanced Functional Materials, EarlyView.
A dye‐based photoinitiator acting as a structure‐directing element, guides the formation of a cholesteric polymer network that behaves as a chirped photonic structure with dissipative chiral coupling. Photopolymerization freezes a depth‐dependent helical pitch, broadening the Bragg resonance spectrum.
Alfredo Mazzulla, Pasquale Pagliusi, Gabriella Cipparrone   +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]

, 2018
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
Lonn, A., von Schulthess, G., Goerres, G., Buck, A., Burger, C., Schoenes, S.   +5 more
core  

A comprehensive study of the shielding ability from ionizing radiation of different mortars using iron filings and bismuth oxide

Scientific Reports
The current work discusses the radiation attenuation capability and different shielding characteristics of different mortar samples. The samples were prepared by replacing different percentages of fine aggregate with iron filling and replacing different ...
Wafa M. Al-Saleh, Mohamed Elsafi, Haifa M. Almutairi, Islam M. Nabil, M. A. El-Nahal   +4 more
doaj   +1 more source

Oxidized MoS2‐Based Multifunctional Memristive Hardware for Energy‐Efficient mmWave Signal Processing and In‐Memory Matrix Multiplication

Advanced Functional Materials, EarlyView.
Thermally oxidized MoS2‐based radio‐frequency switches enable a multifunctional platform that unifies broadband RF switching and in‐memory computation. The device achieves a cutoff frequency of 33.2 THz with high energy efficiency and supports hardware‐aware signal processing.
Juho Son, Changwoo Pyo, Sungmoon Park, Yoongi Cho, Seungchan Lee, Myungsoo Kim   +5 more
wiley   +1 more source

Partitioning of the diffuse attenuation coefficient for photosynthetically available irradiance in a deep dendritic tropical lake

We studied the effects of particulate and dissolved optically active components on the attenuation of photosynthetic active radiation (PAR) in a tropical lake.
JOSÉ F. BEZERRA-NETO, FRANCISCO A.R. BARBOSA, LUCIANA P.M. BRANDÃO, LUDMILA S. BRIGHENTI, PETER A. STAEHR   +4 more
core   +1 more source

Effect of light attenuation on curing performance of ZrO2 ceramic for stereolithography

Materials Research Express
The attenuation coefficient of ultraviolet UV light is a critical factor influencing the mechanical properties of photocurable ceramics. Aiming to fabricate high-precision and high-performance ZrO _2 ceramics, this study systematically investigates the ...
Yao Liu, Jinqiang Zhou, Jianwei Zhang, Jianguo Cheng, Lina Zhan   +4 more
doaj   +1 more source