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Full-Text Articles in Engineering
Marital Infidelity And Its Effect On Pathogen Diversity, Matthew J. Berryman
Marital Infidelity And Its Effect On Pathogen Diversity, Matthew J. Berryman
Faculty of Engineering - Papers (Archive)
Marital infidelity is usually examined solely in terms of strategies of men and women, with an emphasis on the enhanced payoff for male infidelity (provided he can get away with it). What are not clear are the strategies used, in terms of how often to engage in extra-marital affairs. It has been proposed that female strategies are governed by a “decision” to maximize the genetic diversity of her offspring, in order to better guarantee that at least some will survive against a common pathogen. This strategy would then impact on the strategies and diversity of pathogens. I make a number …
Effect Of Boron Powder Purity On Superconducting Properties Of Bulk Mgb2, Xun Xu, Dayse Dos Santos, Jung Ho Kim, Wai Kong Yeoh, Meng J. Qin, Konstantin K. Konstantinov, S. X. Dou
Effect Of Boron Powder Purity On Superconducting Properties Of Bulk Mgb2, Xun Xu, Dayse Dos Santos, Jung Ho Kim, Wai Kong Yeoh, Meng J. Qin, Konstantin K. Konstantinov, S. X. Dou
Faculty of Engineering - Papers (Archive)
In order to study the influence of the amorphous Boron powder on the superconducting properties, MgB2 bulk samples were prepared using 96% and 99% pure commercial Boron powder as well as 92% commercial Boron powder after purification process. The results showed that the original 96% and the purified 92% powders have larger particle size compared to the pure 99% Boron powder, which leads to reduce magnetic critical current densities. In order to get higher performance MgB2, the purified low grade Boron powder need further control of their microstructure such as smaller particle size to enhance flux pinning from the grain …
Effect Of High Pressure During The Fabrication On The Thermal And Mechanical Properties Of Amorphous Ni60nb40 Particle-Reinforced Al-Based Metal Matrix Composites, Peng Yu, Shankar Venkataraman, Jayanta Das, Laichang Zhang, Wenyong Zhang, Jurgen Eckert
Effect Of High Pressure During The Fabrication On The Thermal And Mechanical Properties Of Amorphous Ni60nb40 Particle-Reinforced Al-Based Metal Matrix Composites, Peng Yu, Shankar Venkataraman, Jayanta Das, Laichang Zhang, Wenyong Zhang, Jurgen Eckert
Faculty of Engineering - Papers (Archive)
Ni60Nb40 metallic glass particles, prepared by mechanical alloying, were used to fabricate Al–30 wt% Ni60Nb40 metal matrix composites (MMCs) at 823 K by sintering, hot pressing, and hot extrusion. The Ni60Nb40 reinforcements remained amorphous in all the MMCs fabricated by the different methods. Compression tests revealed that the Young’s modulus and yield strength of the MMCs produced by hot-pressing and hot-extrusion are higher than those for the sintered specimens. Differential scanning calorimeter (DSC) annealing of the as-produced MMCs at 913 K revealed there are severe interfacial reactions between the Al matrix …
Magnetovolume Effect And Magnetic Properties Of Dy2fe17-Xmnx, Jianli Wang, Stewart J. Campbell, O Tegus, C Marquina, M R. Ibarra
Magnetovolume Effect And Magnetic Properties Of Dy2fe17-Xmnx, Jianli Wang, Stewart J. Campbell, O Tegus, C Marquina, M R. Ibarra
Faculty of Engineering - Papers (Archive)
The structural and magnetic properties of Dy2Fe17−xMnx (x=0–5) compounds have been investigated using x-ray diffraction, linear thermal expansion, magnetization measurements, and 57Fe Mössbauer spectroscopy. Compared with Dy2Co17−xMnx compounds for which a linear increase of the unit-cell volume V with increasing Mn fraction is found, the compositional dependence of the lattice parameters of Dy2Fe17−xMnx first exhibits a slight maximum around x=0.5 before increasing monotonically with further increase in x; this behavior can be ascribed to a spontaneous magnetostriction as confirmed by linear-thermal-expansion measurements. The Curie …
Spin-Orbit Interaction Enhanced Polaron Effect In Two-Dimensional Semiconductors, Zhou Li, Zhongshui Ma, Anthony Wright, Chao Zhang
Spin-Orbit Interaction Enhanced Polaron Effect In Two-Dimensional Semiconductors, Zhou Li, Zhongshui Ma, Anthony Wright, Chao Zhang
Faculty of Engineering - Papers (Archive)
It is shown that in two-dimensional semiconductors, the electron-phonon interaction and polaronmass correction are both significantly enhanced by the Rashba spin-orbit coupling. The masscorrection is positive for the upper Rashba branch and negative for the lower Rashba branch. BothRashba branches have the same polaron binding energy, which is higher than that for systems in theabsence of spin-orbit interaction. To the leading order, the correction to the binding energy isproportional to the square of the spin-orbit coupling strength.