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We have performed low-temperature transport measurements on a GaAs two-dimensional electron system at low magnetic fields. Multiple temperature-independent points and accompanying oscillations are observed in the longitudinal resistivity between the low-field insulator and the quantum Hall liquid. The amplitudes of these oscillations can be well described(More)
I n t o d a y ' s h i g h l y c o mp e t i t i v e ma r k e t , b u s i n e s s c o mp e t i t i o n o c c u r s n o t o n l y b e t we e n c o mp a n i e s , b u t a l s o between supply chains. Distributed, yet autonomous, companies intend to collaborate with others, so they can focus on their core competencies to enhance their own competition in the(More)
[1] To investigate the influence of the magnetic field configuration on large-scale ionospheric electrodynamics, a geomagnetic field coordinate system based on Euler potentials is built for three magnetic field configurations: dipole, tilted dipole, and a revision of the International Geomagnetic Reference Field (IGRF). The two-dimensional ionospheric(More)
[1] The daily variation of the geomagnetic field during quiet time at equinox features a longitudinal dependence, which is observed in the dip-latitude/longitude frame. Two explanations are considered: (1) the longitudinal changes of the geomagnetic latitude at constant dip-latitude and (2) the longitudinal variations of the main field, which modulates the(More)
We have performed magnetotransport measurements on gated GaAs two-dimensional electron gases in which electrons are confined in a layer of the nanoscale. From the slopes of a pair of spin-split Landau levels (LLs) in the energy-magnetic field plane, we can perform direct measurements of the spin gap for different LLs. The measured g-factor g is greatly(More)
Computer-assisted image analysis was used to study the immunoreactivity to NF-L, NF-M and NF-H in human spiral ganglion cells. The concentrations, represented by the relative mean grey of NF-L, NF-M and NF-H, were calculated and compared. The cell-area mean-grey correlations for NF-L, NF-M and NF-H were analysed and calculated, showing that NF-M is more(More)
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