The objective of this contribution was to explore the effect of thermodynamic model selection on predicting the solubility of hydrogen in Pyrolysis Gasoline (PYGAS). In order to do this, different combinations of cubic equations of state (EOS), cohesion functions and mixing rules were compared, using both own algorithms and those implemented in the PRO/II 8.0 process simulation software. The mo...

High resolution spectra of seven early B-type giant/supergiant stars in the SMC cluster NGC330 are analysed to obtain their chemical compositions relative to SMC field and Galactic B-type stars. It is found that all seven stars are nitrogen rich with an abundance approximately 1.3 dex higher than an SMC main-sequence field B-type star, AV304. They also display evidence for deficiencies in carbo...

This paper gives a comparative study of the K-means algorithm and the mixture model (MM) method for clustering normal 7 data. The EM algorithm is used to compute the maximum likelihood estimators (MLEs) of the parameters of the MM model. These parameters include mixing proportions, which may be thought of as the prior probabilities of different clusters; the maximum 9 posterior (Bayes) rule is ...

Introduced in 1963, Glauber dynamics is one of the most practiced and extensively studied methods for sampling the Ising model on lattices. It is well known that at high temperatures, the time it takes this chain to mix in L on a system of size n is O(logn). Whether in this regime there is cutoff, i.e. a sharp transition in the L-convergence to equilibrium, is a fundamental open problem: If so,...

We study realistic 3D laser cooling of positronium (Ps) in the presence a magnetic field. Triplet and singlet states mixing due to field, dynamical Stark effect, generally produce higher annihilation rates than zero-field case. is efficient only at very low field $B\ensuremath{\lesssim}50\phantom{\rule{0.16em}{0ex}}\mathrm{mT}$ high values $B⪆0.7\phantom{\rule{0.16em}{0ex}}\phantom{\rule{0.16em...