1,720,973 research outputs found
FE based preliminary thermal analysis to evaluate the curing efficiency of heating elements in mass concrete
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A Multi-Level Micromechanical Approach on the Effect of Fiber Type and Orientation on Ultra-High Performance Concrete Properties
No full textA numerical study to investigate the effect of carbon nanotube (CNT) entanglement on the electrical behavior of nanocomposites
No full textDue to their outstanding electrical and mechanical properties, carbon nanotubes (CNT) have been utilized as popular reinforcing elements for composite materials (Ajayan and Tour, 2007). However, the higher stiffness and aspect ratio (length-to-width ratio) characteristics of CNT lead to entanglement of the tubes, and often interferes with development of CNT conductive networks (Shi et al., 2004). In the present study, a micromechanical model based on Weng (2010) and Yang et al. (2014) is introduced and proposed to estimate the effect of CNT entanglement on the electrical performance of nanocomposites. A series of numerical studies for CNT-reinforced composites is carried out, and the influences of the degree of entanglement on the overall electrical properties of composites are discussed. In addition, the predictive capability of the proposed method is demonstrated via comparisons with experimental data
KINETIC-EQUATION OF A PLASMA IN A STRONG MAGNETIC-FIELD
No full textThe kinetic equation of a quantum plasma is derived by means of the Wigner distribution function and the Bogoliubov approach in a strong magnetic field. The equation includes correctional binary collisions, which account for the influence of a magnetic field on the collisions of particles and the effect of many-body effects.OpticsPhysics, Atomic, Molecular & ChemicalSCI(E)2ARTICLE41983-19874
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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