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The purpose of this paper is to present a frequency domain analysis of high frequency behaviour of an indoor Powerline communications (PLC) circuit in the presence of a plaster board/concrete wall structure. The main purpose of this analysis is to investigate the influence of the wall structure on the current distribution and the radiated electric field due to PLC signals in range from 3 MHz to 30 MHz.

The mathematical model is based on the full‐wave theory formulated by the Mixed Potential Integral Equation (MPIE) for the electric field due to energized thin‐wire conductors in stratified media. The solution for the current and the electric field distribution is obtained by using the Method of Moments.

Numerical results are obtained of the current distribution along the conductors of the PLC circuit and the radiated electric field in presence of a wall structure. Two cases are analyzed: when the circuitry is placed in the wall; and when the circuitry is placed outside the wall.

The paper presents the mathematical model that may be applied for analysis of indoor PLC circuits placed in presence of wall structures.

In the paper, a full‐wave model of the PLC circuitry in presence of a wall structure is developed, on the basis of MPIE and the Method of Moments.

This paper aims to further our understanding of the career success of the self-employed and how it is influenced by their psychological capital (PC), persistence (P) and risk-taking propensity (RTP). This study explores the direct effect of PC on success and investigates the potential mediation of P and RTP on the PC-success association.

In this quantitative study, questionnaires were administered to measure PC, P, risk-taking and success. Data was collected using purposive sampling with an expert judgment that represented a cross-section of the entrepreneurial population in three Malaysian northern states. Structural equation modeling by means of partial least square was used for hypotheses testing of the 252 usable responses.

Statistically significant and positive relationships were found between PC and success, whereas P and risk-taking were found to mediate the PC-success association. The mediation effects of P and risk-taking were more pronounced when entrepreneurial self-efficacy and optimism were included in the PC as a second-order construct than individually separate constructs.

The importance of the transitional progression of self-efficacy and optimism to success through P and risk-taking were verified and so can be used for nurturing efforts that activate positive self-efficacy and optimism for entrepreneurial career success. The lower mediation effect of risk-taking on the optimism-success association denotes caution when managing risk.

There is a relative dearth of supporting research that has not examined the inter-relationships between PC and career success of entrepreneurs. Exploring the intervening effect of P and risk-taking on that relationship is unprecedented.