Showing papers by "Nakanihon Automotive College published in 1999"
TL;DR: Two models have been studied for the behavior avoiding from collision when the pedestrians meet with each other in a system where one pedestrian and many pedestrians walk in the opposite direction and encounter each other on a passageway.
Abstract: Cellular automaton models for walking of pedestrians are studied in a system where one pedestrian and many pedestrians walk in the opposite direction and encounter each other on a passageway. Two models have been studied for the behavior avoiding from collision when the pedestrians meet with each other. Phase transitions on the walking behavior occur by self-organization with the critical density on the pedestrians.
186 citations
TL;DR: In this paper, the ESR spectra of Cr3+ ions in LiSrxCa1-xAlF6 were measured at X-band microwave frequencies in the temperature range 1.3-300 K.
Abstract: Electron spin-resonance (ESR) spectra of Cr3+ ions in LiSrxCa1-xAlF6 crystals with x = 0, 0.5, 0.8, and 1 have been measured at X-band microwave frequencies in the temperature range 1.3-300 K. The intense ESR lines from Cr3+ ions in these crystals have been fitted to a trigonal spin Hamiltonian to determine values of the g-tensor (g,g) and zero-field splitting, 2D. The principal g-values (g g1.974) are almost the same in all cases whereas 2D increases sequentially for x = 0, 0.5, 0.8, and 1. The value of |2D| for Cr3+:LiCaAlF6 decreases gradually as the temperature is increased from 1.3 K to 300 K. Over this same temperature range the value of |2D| for Cr3+:LiSrAlF6 increases. The ESR spectra for Cr3+ in LiSr0.5Ca0.5AlF6 and LiSr0.8Ca0.2AlF6 are inhomogeneously broadened by discrete centres with pseudo-trigonal symmetry, different configurations of which correspond to the random occupation of the second-nearest-neighbour cation sites by Ca2+ and Sr2+ ions.
17 citations