Application of the Harmonic Balance Method for Spatial Harmonic Interactions Analysis in Axial Flux PM Generators

In this paper, an application of the Harmonic Balance Method (HBM) for analysis of Axial Flux Permanent Magnet Generator (AFPMG) is carried out. Particular attention was paid to development of mathematical model equations allowing to estimate the machine properties, without having to use quantitative solutions. The methodology used here allowed for precise determination of Fourier spectra with respect to winding currents and electromagnetic torque (both quantitatively and qualitatively) in steady state operation. Analyses of space harmonic interaction in steady states were presented for the three-phase AFPMG. Satisfactory convergence was between the results of calculations and measurements which confirmed the initial assumption that the developed circuit models of AFPMG are sufficiently accurate and can be useful in the diagnostic analyses, tests and the final stages of the design process.

Determinants of Proactive Work Behavior of Employees During the COVID-19 Crisis

As a result of the COVID-19 pandemic, organizations have been forced to use social media and digital applications to carry out routine tasks. This posed several complications and challenges that hindered harmonic interaction between managers and their subordinates. This study investigates the indirect association between toxic leadership and proactive work behavior via psychological safety (PYS). We also investigate the role of perceived insider status (PIS) as a moderator in the association between toxic leadership and PYS as well as the indirect connection between toxic leadership and proactive work behavior. The work is based on the timelag results of 282 supervisor-employee dyads from different small and mid-sized information technology (IT) firms. The results show that toxic leadership has a significant impact on employee PSY and proactive work behavior as well as revealing that PIS substantially mitigated the negative effects of toxic leadership on employee PYS. Similarly, PIS influences the mediating role of PYS in the association between toxic leadership and proactive work behavior of employees. This research is helpful for academics and practitioners involved in human-resource practices in the IT industry.

Defects in Graphene/h-BN Planar Heterostructures: Insights into the Interfacial Thermal Transport Properties

In this work, the defects (local stress generated) induce the formation of graphene/h-BN planar heterostructure (Gr-hBN-PH) to form "unsteady structure". Then, the coupling effects of external field (heat flow direction, strain and temperature field) and internal field (defect number, geometry shape and interfacial configuration) on the interface thermal conductivity (ITC) of Gr-hBN-PH were studied. The results show phonon transmission is less affected by compression deformation under the action of force-heat-defect coupling, while phonon transmission of heterostructure is more affected by tensile deformation. The non-harmonic interaction of the atoms in the composite system is strengthened, causing the softening of high-frequency phonons. The greater reduction of thermal transport at the interface of heterostructures will be. The interface bonding morphology plays a significant role on the ITC of the Gr-hBN-PH. The relationship between structure and properties in the low dimension is analyzed from the perspective of defect energy. It is helpful for us to understand the physical mechanism of low-dimensional structure, realize multiple structural forms, and even explore new uses.