LOGISTIC MANAGEMENT IN COMMERCE ENTERPRISES

The importance of logistic management for the general developmentstrategy of functioning of the enterprise is a stimulus to consider it in terms of newmethodology in enterprise management. Taking into account the up-to-date experiencesof logistics, either as a scientific branch or a practice, logistic management cannot betreated in the same way as the system management, through its aims, or the strategicmanagement understood as new method of management.logistic, management, enterprises

Electric Currents at Semiconductor Surfaces from the Perspective of Drift-Diffusion Equations

Surface sensitive electric current measurements are important experimental tools poorly corroborated by theoretical models. We show that the drift-diffusion equations offer a framework for a consistent description of such experiments. The current flow is calculated as a perturbation of an equilibrium solution depicting the space charge layer. We investigate the accumulation and inversion layers in great detail. Relying on numerical findings, we identify the proper length parameter, the relationship of which with the length of the space charge layer is not simple. If the length parameter is large enough, long-ranged modes dominate the Green's function of the current equation, leading to two-dimensional currents. In addition, we demonstrate that the surface behavior of the currents is ruled by only a few parameters. This explains the fact that simplistic conductivity models have proven effective but makes reconstructions of conductance profiles from surface currents rather questionable.Comment: 11 pages, 3 figures; some overlap with arXiv:1605.0268