Development of structural components of future technicians’ professional competencies during their studies of general disciplines in college

The relevance of the problem stems from the necessity to develop and implement the formation model for structural components of future technicians’ professional competencies during their studies of general professional disciplines. The purpose of the article is to carry out a theoretical study, to develop and approbate a model that forms the structural components of future maintenance and repair of automobile technicians’ professional competencies during their studies of general professional discipline “Materials science”. The leading method towards studies of this problem is technologies and methods of educational process modeling; works on educational research methodology. The article theoretically proves, develops and approbates a formation model for future maintenance and repair of automobiles technicians’ professional competencies during their studies of general professional discipline “Materials science”. This article may be useful for developing the competence-oriented content for training courses aimed at the formation of structural components of professional competencies. © 2016 Kopilov et al

Diameter-dependent thermopower of Bi nanowires

We present a study of electronic transport in individual Bi nanowires of large diameter relative to the Fermi wavelength. Measurements of the resistance and thermopower of intrinsic and Sn-doped Bi wires with various wire diameters, ranging from 150-480 nm, have been carried out over a wide range of temperatures (4-300 K) and magnetic fields (0-14 T). We find that the thermopower of intrinsic Bi wires in this diameter range is positive (type-p) below about 150 K, displaying a peak at around 40 K. In comparison, intrinsic bulk Bi is type-n. Magneto-thermopower effects due to the decrease of surface scattering when the cyclotron diameter is less than the wire diameter are demonstrated. The measurements are interpreted in terms of a model of diffusive thermopower, where the mobility limitations posed by hole-boundary scattering are much less severe than those due to electron-hole scattering.Comment: 32 pages, 12 figures. Previous version replaced to improve readabilit