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The influence of the subunit composition of human GABA(A) receptors upon the GABA-modulatory properties of 5alpha-pregnan-3alpha-ol-20-one (5alpha,3alpha) has been examined using the Xenopus laevis oocyte expression system and the two electrode voltage-clamp technique. Steroid potency (EC(50)) is modestly influenced by the alpha-isoform(More)
Turned parts on turning centers are made up of features with profiles defined by arcs and lines. An error model for turned parts must take into account not only individual feature errors but also ow errors carry over from one feature to another. In the case where there is a requirement of tange:icy between two features, such as a line tangent to an arc or(More)
Problem-based learning (PBL) is an educational method in which students learn through solving problems in small groups and reflecting on their experiences. The teacher's key role is no longer didactic but is changed to one that facilitates a collaborative construction of knowledge. This small-scale qualitative research aims to examine students' perceptions(More)
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