High-Performance Work Systems And Firm Performance: Moderating Effects Of Organizational Communication

This study examines the relationship between high-performance work systems (HPWS) and organizational performance and how the relationship differs by type of communication within organizations. Using data on publicly traded manufacturing firms in Korea from the Human Capital Corporate Panel survey, we find that HPWS are positively related to organizational performance, and importantly, this relationship varies by the level of vertical and horizontal communication. The positive effect of HPWS on organizational performance is more apparent when vertical and horizontal communications are relatively high. These results emphasize the role of internal communication as an important organizational context for the implementation of HPWS

Measurement of the azimuthal anisotropy of Y(1S) and Y(2S) mesons in PbPb collisions at root s(NN)=5.02 TeV

The second-order Fourier coefficients (v(2)) characterizing the azimuthal distributions of Y(1S) and Y(2S) mesons produced in PbPb collisions at root s(NN) = 5.02 TeV are studied. The Y mesons are reconstructed in their dimuon decay channel, as measured by the CMS detector. The collected data set corresponds to an integrated luminosity of 1.7 nb(-1). The scalar product method is used to extract the v2 coefficients of the azimuthal distributions. Results are reported for the rapidity range vertical bar y vertical bar < 2.4, in the transverse momentum interval 0 < pT < 50 GeV/c, and in three centrality ranges of 10-30%, 30-50% and 50-90%. In contrast to the J/psi mesons, the measured v(2) values for the Y mesons are found to be consistent with zero. (C) 2021 The Author(s). Published by Elsevier B.V.Peer reviewe

CEO labor market and R&amp;D investment in high-technology firms: An empirical study on the disciplinary effect of CEO labor market

Copyright © The Author(s), 2022. Published by Cambridge University Press in association with Australian and New Zealand Academy of Management.Previous corporate governance research has paid little attention to the role of chief executive officer (CEO) labor markets in controlling CEO behaviors because the CEO labor market has been considered inefficient. With the increasing mobility of top executives across firms, however, the potential of CEO labor markets to serve as an external disciplining force has been growing. In this study, we argue that CEOs will be more pressured to engage in desirable behaviors as the CEO labor market becomes more efficient. Using a longitudinal sample of S&amp;P 1500 firms in high-technology industries in United States from 2011 to 2019, we found that CEOs tend to increase R&amp;D investment as CEO labor market supply increases. We also found that the tendency is greater when external CEO succession is more frequent in the market. Our results demonstrate that CEO labor markets have the potential to function as an effective external governance mechanism.N

Trade-off between torque ripple and vibration in an IPMSM by examining the temporal and spatial harmonics of flux density

Despite continuous effort to minimize torque ripple, the reduction of vibration has not been yet achieved due to the lack of link between these two performances. The difficulty of investigating the relationship stems from the fact that torque is solely influenced by tangential force whereas vibration is directly tied to radial force. In this paper, the correlation between torque ripple and vibration in an IPMSM (Interior Permanent Magnet Synchronous Motor) is established by examining the air-gap flux density in both radial and tangential directions. Its temporal and spatial harmonics are analyzed. A six-pole nine-slot IPMSM is used as a base configuration, and the air-gap flux density is varied by changing the height of a stator tooth tip. In the previous study, the same approach has been done to observe how to reduce torque ripple effectively. In this study, however, it is found that the trend of torque ripple is not the same as that of vibration with respect to the height of a pole tip, and the relation between the two is thoroughly observed and explained

Investigation of electromagnetic noise in an induction cooktop by examining circular membrane vibration modes in terms of their harmonics

In this study, the mechanism of vibration and noise is analytically investigated in an induction cooktop (IC). By employing the method of an electric motor in estimating its vibration performance, it is found that air-gap force normal to the glass surface is a main source in an IC. Three different types of a cookware in terms of its material are compared as a part of load, and the pattern of their vibration is scrutinized by means of a membrane. It is noted that the mode of vibration in an IC is the circular shape of a membrane. Spatial and temporal harmonics in normal force are obtained through a three-dimensional Fast Fourier transform. This study is focused on spatial harmonic orders in a cylindrical coordinate to determine the dominant mode of vibration, and experimental verification has been performed to prove the feasibility of this proposal

G-K curve-based knee point prediction method for Li-ion batteries

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Analysis of Vibration and Noise in a Permanent Magnet Synchronous Motor Based on Temperature-Dependent Characteristics of Permanent Magnet

Interior permanent magnet synchronous motors (IPMSMs) are widely utilized due to their high power density. However, noise and vibration issues are often encountered in these motors. While researchers have extensively investigated individual aspects such as noise, vibration, and heat generation in PMSMs, there has been a lack of comprehensive studies examining the interrelationships among these factors. In this paper, a novel approach is proposed for predicting vibration by considering the radial force in the air gap as the exciting force, while also accounting for the changes in the permanent magnet (PM) characteristics caused by heat generation during motor operation. The method involves decomposing and identifying vibration components associated with each vibration mode and predicting noise based on the sound radiation efficiency of each mode. By constructing a vibration map based on current and temperature at a specific frequency, the components most affected by current variations and PM characteristics can be identified. This allows for the proposal of design improvements aimed at reducing vibration. Furthermore, by comparing the vibration map with the noise map, it is confirmed that vibration serves as a source of noise and influences its generation. However, it is found that vibration and noise are not strictly proportional. Overall, a comprehensive analysis of the correlations between vibration, noise, and other factors in IPMSMs is presented in this study. The proposed method and findings contribute to the understanding of the complex dynamics involved and provide valuable insights for the design of quieter and more efficient motor systems