Search Results
6796articles matched your search query

Advance Search

Displaying article 1-10 on page 1 of 6796. Results per page
  • The Mediating Role of Boundary Creation around Work-Related ICT Use between Segmentation Preference and Psychological Detachment
  • Abstract Work-related use of ICT (W_ICT) at home has been found to relate to important employee outcomes in their work and family lives. However, little is known about how individuals can actively apply strategies or tactics to utilize the advantages or reduce the disadvantages of W_ICT. In the current study, based on boundary theory, we examined the interaction effect of segmentation preference and boundary control in creating the boundary around W_ICT and its subsequent positive effect on individuals’ psychological detachment. Results based on a sample of 560 Chinese full-time employees showed that only for individuals with higher boundary control, segmentation preference…
  • More
  •   Views:4       Downloads:2        Download PDF
  • The Influence of Supervisor’s Transformational Leadership and Followers’ Occupational Well-Being: A Dual Pathway Model from a Conservation of Resources Theory
  • Abstract Occupational well-being is optimal psychological functioning and experience in the workplace. This study examined the role of opportunities for career development as a mechanism that links supervisor’s transformational leadership and subordinates’ occupational well-being manifested by work engagement. Specifically, drawing on conservation of resources theory (COR), we developed a dual pathway model in which opportunities for promotion and for professional development were posited as two important mediators in the relationship between transformational leadership and work engagement. The hypotheses were tested with a sample of 215 Chinese civil servants. The results of structural equation modeling showed that a supervisor’s transformational leadership was…
  • More
  •   Views:6       Downloads:4        Download PDF
  • Hidden Dangers of Identity Switching: The Influence of Work-Family Status Consistency on Emotional Exhaustion and Workplace Deviance
  • Abstract Workplace deviance is an important problem in organization management. Previous studies focused too much on the influence of various factors in the workplace and ignored the interference of family factors. We integrate emotional social function theory and emotional labor theory, and examine the effect of (in) congruence between work and family status on workplace deviance. Using longitudinal data and polynomial regression, we find that: (1) Emotional exhaustion is higher when work and family status are congruent; (2) In the case of work-family congruence, emotional exhaustion is higher when work and family status are aligned at a low level than when…
  • More
  •   Views:5       Downloads:6        Download PDF
  • A Joint Delay-and-Sum and Fourier Beamforming Method for High Frame Rate Ultrasound Imaging
  • Abstract Frame rate is an important metric for ultrasound imaging systems, and high frame rates (HFR) benefit moving-target imaging. One common way to obtain HFR imaging is to transmit a plane wave. Delay-and-sum (DAS) beamformer is a conventional beamforming algorithm, which is simple and has been widely implemented in clinical application. Fourier beamforming is an alternative method for HFR imaging and has high levels of imaging efficiency, imaging speed, and good temporal dynamic characteristics. Nevertheless, the resolution and contrast performance of HFR imaging based on DAS or Fourier beamforming are insufficient due to the single plane wave transmission. To address this…
  • More
  •   Views:129       Downloads:118        Download PDF
  • Automatic Sleep Staging Algorithm Based on Random Forest and Hidden Markov Model
  • Abstract In the field of medical informatics, sleep staging is a challenging and timeconsuming task undertaken by sleep experts. According to the new standard of the American Academy of Sleep Medicine (AASM), the stages of sleep are divided into wakefulness (W), rapid eye movement (REM) and non-rapid eye movement (NREM) which includes three sleep stages (N1, N2 and N3) that describe the depth of sleep. This study aims to establish an automatic sleep staging algorithm based on the improved weighted random forest (WRF) and Hidden Markov Model (HMM) using only the features extracted from double-channel EEG signals. The WRF classification model…
  • More
  •   Views:99       Downloads:91        Download PDF
  • Fractional Analysis of Viscous Fluid Flow with Heat and Mass Transfer Over a Flexible Rotating Disk
  • Abstract An unsteady viscous fluid flow with Dufour and Soret effect, which results in heat and mass transfer due to upward and downward motion of flexible rotating disk, has been studied. The upward or downward motion of non rotating disk results in two dimensional flow, while the vertical action and rotation of the disk results in three dimensional flow. By using an appropriate transformation the governing equations are transformed into the system of ordinary differential equations. The system of ordinary differential equations is further converted into first order differential equation by selecting suitable variables. Then, we generalize the model by using…
  • More
  •   Views:84       Downloads:85        Download PDF
  • On Caputo-Type Cable Equation: Analysis and Computation
  • Abstract In this paper, a special case of nonlinear time fractional cable equation is studied. For the equation defined on a bounded domain, the existence, uniqueness, and regularity of the solution are firstly studied. Furthermore, it is numerically studied via the weighted and shifted Grünwald difference (WSGD) methods/the local discontinuous Galerkin (LDG) finite element methods. The derived numerical scheme has been proved to be stable and convergent with order O(∆t2 + hk+1), where ∆t, h, k are the time stepsize, the spatial stepsize, and the degree of piecewise polynomials, respectively. Finally, a numerical experiment is presented to verify the theoretical analysis.
  • More
  •   Views:81       Downloads:76        Download PDF
  • Modelling of Energy Storage Photonic Medium by WavelengthBased Multivariable Second-Order Differential Equation
  • Abstract Wavelength-dependent mathematical modelling of the differential energy change of a photon has been performed inside a proposed hypothetical optical medium. The existence of this medium demands certain mathematical constraints, which have been derived in detail. Using reverse modelling, a medium satisfying the derived conditions is proven to store energy as the photon propagates from the entry to exit point. A single photon with a given intensity is considered in the analysis and hypothesized to possess a definite non-zero probability of maintaining its energy and velocity functions analytic inside the proposed optical medium, despite scattering, absorption, fluorescence, heat generation, and other…
  • More
  •   Views:77       Downloads:77        Download PDF
  • A Comprehensive Model for Structural Non-Probabilistic Reliability and the Key Algorithms
  • Abstract It is very difficult to know the exact boundaries of the variable domain for problems with small sample size, and the traditional convex set model is no longer applicable. In view of this, a novel reliability model was proposed on the basis of the fuzzy convex set (FCS) model. This new reliability model can account for different relations between the structural failure region and variable domain. Key computational algorithms were studied in detail. First, the optimization strategy for robust reliability is improved. Second, Monte Carlo algorithms (i.e., uniform sampling method) for hyper-ellipsoidal convex sets were studied in detail, and errors…
  • More
  •   Views:80       Downloads:66        Download PDF
  • Experimental and Numerical Investigation on the Tensile Fracture of Compacted Clay
  • Abstract This paper performed flexural test and numerical simulation of clay-beams with different water contents to study the tensile fracture of clay soil and the relevant mechanisms. The crack initiation and propagation process and the accompanied strain localization behaviors were all clearly observed and analyzed. The exponential cohesive zone model was proposed to simulate the crack interface behavior of the cohesivefrictional materials. The experimental results show that the bending capacity of claybeams decrease with the water content, while those of the crack mouth opening displacement, crack-tip strain and the strain localization range increase. The numerical predictions successfully reproduce the evolving tensile…
  • More
  •   Views:50       Downloads:48        Download PDF
Displaying article 1-10 on page 1 of 6796. Go to page