Analysis of dynamic wireless power transfer systems based on behavioral modeling of mutual inductance

This paper proposes a system-level approach suitable to analyze the performance of a dynamic Wireless Power Transfer System (WPTS) for electric vehicles, accounting for the uncertainty in the vehicle trajectory. The key-point of the approach is the use of an analytical behavioral model that relates mutual inductance between the coil pair to their relative positions along the actual vehicle trajectory. The behavioral model is derived from a limited training data set of simulations, by using a multi-objective genetic programming algorithm, and is validated against experimental data, taken from a real dynamic WPTS. This approach avoids the massive use of computationally expensive 3D finite element simulations, that would be required if this analysis were performed by means of look-up tables. This analytical model is here embedded into a system-level circuital model of the entire WPTS, thus allowing a fast and accurate analysis of the sensitivity of the performance as the actual vehicle trajectory deviates from the nominal one. The system-level analysis is eventually performed to assess the sensitivity of the power and efficiency of the WPTS to the vehicle misalignment from the nominal trajectory during the dynamic charging process

A power-loss-dependent inductance model for ferrite-core power inductors in switch-mode power supplies

This paper proposes a new modeling approach for ferrite-core (FC) power inductors used in switch-mode power supplies (SMPSs). In particular, a novel power-loss-dependent inductance behavioral model is proposed, whose parameters can be identified through a limited set of proper experimental measurements of inductor current and voltage. Unlike conventional thermal modeling approaches, which require information on core temperature, the proposed behavioral model relies only on easily measurable quantities. The model is also suitable for being implemented in circuit simulators. By comparing PSIM simulations and experimental measurements on a buck converter for commercial FC inductors, we show that the model allows a reliable prediction of the steady-state inductor current, under different SMPS working conditions

Short-term impact of the EuroPean Accredited Curriculum on Tobacco Treatment Training (EPACTT) program

INTRODUCTION The aim of this pilot study was to assess the short-term effectiveness of the EuroPean Accredited Curriculum on Tobacco Treatment Training intervention in improving health care providers' knowledge, attitudes and self-efficacy related to tobacco dependence treatment. METHODS A pre-post pilot study was conducted. The two-day training intervention took place in Brussels in April 2016. Health care professionals from six European countries (Russia, Ukraine, Georgia, Armenia, Romania and Greece) were purposively invited to participate in the study. Evaluation was performed before the intervention, immediately after, and at approximately two months following the intervention. Changes in outcomes of interest were examined before and after exposure to the intervention program. RESULTS In all, 47 health care professionals participated in the training of which 40 completed the evaluation surveys. Significant increases in providers' self-efficacy and perceived behavioral control related to tobacco treatment delivery were documented immediately following the training and at the 2 months follow-up. Significant improvement in provider knowledge and attitudes were observed in some items assessed. CONCLUSIONS The results demonstrate that training is able to improve provider self-efficacy related to tobacco treatment delivery in this cross-national European sample of health care professionals. Additional research is required to examine the generalizability of our findings

Short-term impact of the EuroPean Accredited Curriculum on Tobacco Treatment Training (EPACTT) program

Introduction The aim of this pilot study was to assess the short-term effectiveness of the EuroPean Accredited Curriculum on Tobacco Treatment Training intervention in improving health care providers’ knowledge, attitudes and self-efficacy related to tobacco dependence treatment. Methods A pre-post pilot study was conducted. The two-day training intervention took place in Brussels in April 2016. Health care professionals from six European countries (Russia, Ukraine, Georgia, Armenia, Romania and Greece) were purposively invited to participate in the study. Evaluation was performed before the intervention, immediately after, and at approximately two months following the intervention. Changes in outcomes of interest were examined before and after exposure to the intervention program. Results In all, 47 health care professionals participated in the training of which 40 completed the evaluation surveys. Significant increases in providers’ self-efficacy and perceived behavioral control related to tobacco treatment delivery were documented immediately following the training and at the 2 months follow-up. Significant improvement in provider knowledge and attitudes were observed in some items assessed. Conclusions The results demonstrate that training is able to improve provider self-efficacy related to tobacco treatment delivery in this crossnational European sample of health care professionals. Additional research is required to examine the generalizability of our findings