Results 41 to 50 of about 55,127 (244)

Fast‐Responding O2 Gas Sensor Based on Luminescent Europium Metal‐Organic Frameworks (MOF‐76)

Advanced Functional Materials, EarlyView.
Luminescent MOF‐76 materials based on Eu(III) and mixed Eu(III)/Y(III) show rapid and reversible changes in emission intensity in response to O2 with very short response times. The effect is based on triplet quenching of the linker ligands that act as photosensitizers. Average emission lifetimes of a few milliseconds turn out to be mostly unaffected by
Zhenyu Zhao, Christian Weinberger, Jakob Steube, Matthias Bauer, Martin Brehm, Michael Tiemann   +5 more
wiley   +1 more source

Enhanced discrete ordinates approach for mitigating shadowing effects in obstructed gas-filled spaces: Implications for astrophysical and industrial applications

Results in Engineering
This article introduces a novel quadrature scheme for the discrete ordinates method (DOM) called Uniform Constant Weight Quadrature (UCWQ). A new version of the discrete ordinates method has been developed to address the shadowing effects in gas-filled ...
Taoufik Gassoumi, Umar F. Alqsair, Rachid Said   +2 more
doaj   +1 more source

Analysis for the Effect of Spatial Discretization Method on AP1000 Reactor Pressure Vessel Fluence Calculation

Science and Technology of Nuclear Installations, 2016
Maintaining the structural integrity of the reactor pressure vessel (RPV) is a critical concern related to the safe operation of nuclear power plants. To estimate the structural integrity over the designed lifetime and to support analyses for a potential
Junxiao Zheng, Bin Zhang, Shengchun Shi, Yixue Chen   +3 more
doaj   +1 more source

On the spectral Green’s function-constant nodal method for fixed-source SN problems in X,Y-geometry with arbitrary L’th-order anisotropic scattering

Brazilian Journal of Radiation Sciences, 2021
Presented here is an extension of the spectral Green’s function-constant nodal (SGF-CN) method for the numerical solution of energy multigroup, fixed-source, discrete ordinates (SN) problems in X, Y-geometry with arbitrary L’th-order of scattering ...
Welton Menezes, Gustavo Alvarez, Ricardo Barros   +2 more
doaj   +1 more source

VAE+DDPG: An Attention‐Enhanced Variational Autoencoder for Deep Reinforcement Learning‐Based Autonomous Navigation in Low‐Light Environments

Advanced Intelligent Systems, EarlyView.
Variational Autoencoder+Deep Deterministic Policy Gradient addresses low‐light failures of infrared depth sensing for indoor robot navigation. Stage 1 pretrains an attention‐enhanced Variational Autoencoder (Convolutional Block Attention Module+Feature Pyramid Network) to map dark depth frames to a well‐lit reconstruction, yielding a 128‐D latent code ...
Uiseok Lee, Chanhong Hwang, Hyunseok Kang, Yechan Park, Hangwoo Jin, Tuan Anh Nguyen, Eunmi Choi, Dugki Min   +7 more
wiley   +1 more source

Microrobotic Catheterization of the Ophthalmic Artery for Targeted Treatment of Retinoblastoma

Advanced Intelligent Systems, EarlyView.
A microrobotic platform is presented that allows teleoperated and autonomous navigation of flow‐driven magnetic microcatheters, MagFlow, into the ophthalmic artery for superselective intra‐arterial infusion of chemotherapy to treat retinoblastoma. Extensive benchtop validations with patient‐derived biomimetic phantoms under optical and fluoroscopic ...
Artur Banach, Mehdi Krichen, Julian Raub, Christina Stathopoulos, Bruno Bartolini, Mahmut Selman Sakar   +5 more
wiley   +1 more source

Thermal Calculations for Co‐Firing of Hydrogen/Ammonia and Coal in 660‐MW Coal‐Fired Boilers

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT To achieve a clean energy transition under the dual carbon goals, blending hydrogen/ammonia into pulverized coal boilers represents a key technological pathway. Different hydrogen/ammonia co‐firing ratios (5%–50%) are investigated for their impact on the thermodynamic characteristics of 660‐MW supercritical boiler at 100% and 20% boiler ...
Yaodong Da, Nana Hou, Weipeng Wang, Yongqiang Chang, Xin Liu, Feng Pan, Defu Che, Lei Deng   +7 more
wiley   +1 more source

Discrete ordinates-Monte Carlo coupling: A comparison of techniques in NERVA radiation analysis [PDF]

, 1972
In the radiation analysis of the NERVA nuclear rocket system, two-dimensional discrete ordinates calculations are sufficient to provide detail in the pressure vessel and reactor assembly.
Lindstrom, D. G., Normand, E., Wilcox, A. D.   +2 more
core   +1 more source

A Ricci-flat metric on D-brane orbifolds [PDF]

, 1998
We study issues pertaining to the Ricci-flatness of metrics on orbifolds resolved by D-branes. We find a K\"ahler metric on the three-dimensional orbifold $\C^3/\Z_3$, resolved by D-branes, following an approach due to Guillemin. This metric is not Ricci-
Aspinwall, Bianchi, Guillemin, Koushik Ray, Witten, Witten   +5 more
core   +3 more sources

Bridging home, school and community to address educational inequality: Supporting educational trajectories through community bridge work

British Educational Research Journal, EarlyView.
Abstract This paper explores the role of community stakeholders in supporting the educational trajectories of students experiencing socio‐economic disadvantage in the Irish context. Building on international and national policy debates, the study examines how community‐based organisations, statutory services and outreach initiatives work alongside ...
Aoife Joy Keogh, Deirdre McGillicuddy
wiley   +1 more source