Results 81 to 90 of about 9,665,764 (300)

Evaluation of radiation shielding properties of the polyvinyl alcohol/iron oxide polymer composite

Journal of Medical Physics, 2017
Context: Lead is the conventional shielding material against gamma/X-rays. It has some limitations such as toxic, high density, nonflexibility, and also bremsstrahlung production during electron interaction.
K Srinivasan, E James Jabaseelan Samuel
doaj   +1 more source

Is an Apple an Orange? A Large Language Model Benchmark for Candidate Term Extraction and Subclass Decisions Against Upper Ontologies in Engineering and Materials Science

Advanced Engineering Materials, EarlyView.
Building machine‐readable vocabularies for materials science is slow, expert‐driven work. This study benchmarks 13 large language models on two of its first steps: finding candidate terms in engineering articles and deciding where they belong in a class hierarchy.
Thomas Bjarsch, Maximilian Holland, Klaus Drechsler, Johannes Schilp   +3 more
wiley   +1 more source

Accuracy of measuring half‐ and quarter‐value layers and appropriate aperture width of a convenient method using a lead‐covered case in X‐ray computed tomography

Journal of Applied Clinical Medical Physics, 2014
Determination of the half‐value layer (HVL) and quarter‐value layer (QVL) values is not an easy task in X‐ray computed tomography (CT), because a nonrotating X‐ray tube must be used, which requires the assistance of service engineers.
Kosuke Matsubara, K. Ichikawa, Yuichi Murasaki, A. Hirosawa, K. Koshida   +4 more
semanticscholar   +1 more source

Ontology‐Aligned Structuring and Reuse of Multimodal Materials Data and Workflows Toward Automatic Reproduction

Advanced Engineering Materials, EarlyView.
Reproduction of stacking fault energy calculations from literature with a semi‐automated large language model‐assisted extraction procedure: extraction of simulation protocol, atomistic structures, computational parameters, and reported results, ontology alignment, knowledge graph construction and, finally, recomputation forvalidation.
Sepideh Baghaee Ravari, Abril Azocar Guzman, Sarath Menon, Stefan Sandfeld, Tilmann Hickel, Markus Stricker   +5 more
wiley   +1 more source

Layer-by-layer analyses of choroidal structures of treatment eyes and the fellow eyes before and after half-dose PDT.

, 2016
Layer-by-layer analyses of choroidal structures of treatment eyes and the fellow eyes before and after half-dose PDT.
Yoshinori Mitamura (361411), Junya Mori (3124161), Taiji Sakamoto (104961), Kentaro Semba (138862), Mariko Egawa (3124158), Kei Akaiwa (3124155), Shozo Sonoda (104941), Takamasa Kinoshita (1675516), Terumi Mori (2946924)   +8 more
core   +1 more source

The onset of instability in unsteady boundary-layer separation [PDF]

, 1996
The process of unsteady two-dimensional boundary-layer separation at high Reynolds number is considered. Solutions of the unsteady non-interactive boundary-layer equations are known to develop a generic separation singularity in regions where the ...
K. W. Cassel, J. D. A. Walker, Smith, FT, Cassel, KW, Walker, JDA, F. T. Smith   +5 more
core   +1 more source

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

Advanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi, Hadi Moutablaleh, Ignatius A. Setiawan, Mehrshad Mehrpouya   +3 more
wiley   +1 more source

Experimental Investigation of Clay Fly Ash Bricks for Gamma-Ray Shielding

Nuclear Engineering and Technology, 2016
This study aims to determine the effect of fly ash with a high replacing ratio of clay on the radiation shielding properties of bricks. Some interaction parameters (mass attenuation coefficients, half value layer, effective atomic number, effective ...
Harjinder Singh Mann, Gurdarshan Singh Brar, Kulwinder Singh Mann, Gurmel Singh Mudahar   +3 more
doaj   +1 more source

Ionometric Half Value Layer Meter for Measurements of the Quality of X-Rays [PDF]

Zeitschrift für Naturforschung A, 1951
Abstract An instrument is described which permits the measurement of the quality of X-rays in terms of the half value layer (HVL) of a suitable filter material. It consists of two ionization chambers adjustable in volume, which are connected in opposition and linked with an X-ray dose measuring device.
openaire   +1 more source

Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading

Advanced Engineering Materials, EarlyView.
This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev, Noah‐Lean Roschlaub, Anne Jung   +2 more
wiley   +1 more source