5,062 research outputs found
The New Initiatives for Strengthening Public Human Resource Management
In this paper, we will analyze how to strengthen the public human resource management through knowledge management. Try to find out the reality of our public human resource management and the special reasons for this situation, the further to get the new methods and new measures for strengthening it
New gapped quantum phases for S=1 spin chain with D2h symmetry
We study different quantum phases in integer spin systems with on-site
D2h=D2xZ2 and translation symmetry. We find four distinct non-trivial phases in
S=1 spin chains despite they all have the same symmetry. All the four phases
have gapped bulk excitations, doubly-degenerate end states and the
doubly-degenerate entanglement spectrum. These non-trivial phases are examples
of symmetry protected topological (SPT) phases introduced by Gu and Wen. One of
the SPT phase correspond to the Haldane phase and the other three are new.
These four SPT phases can be distinguished experimentally by their different
response of the end states to weak external magnetic fields. According to
Chen-Gu-Wen classification, the D2h symmetric spin chain can have totally 64
SPT phases that do not break any symmetry. Here we constructed seven nontrivial
phases from the seven classes of nontrivial projective representations of D2h
group. Four of these are found in S=1 spin chains and studied in this paper,
and the other three may be realized in S=1 spin ladders or S=2 models.Comment: 15+ pages,5 figures, 9 table
The effects of halogen elements on the opening of an icosahedral B12 framework
The fully halogenated or hydrogenated B12X12 (X = H, F, Cl, Br and I)
clusters are confirmed to be icosahedral. On the other hand, the bare B12
cluster is shown to have a planar structure. A previous study showed that a
transformation from an icosahedron to a plane happens when 5 to 7 iodine atoms
are substituted. Later, the transition was confirmed to be seven iodine
substitutions based on an infrared spectroscopy study. In this study, we
investigated the effects of different halogen atoms on the opening of the B12
icosahedral cage by means of density functional theory calculations. We found
that the halogen elements do not have significant effects on the geometries of
the clusters. The computed IR spectra show similar representative peaks for all
halogen substituted clusters. Interestingly, we found a blue-shift in the IR
spectra with the increase in the mass of the halogen atoms. Further, we
compared the Gibbs free energies at different temperatures for different
halogen atoms. The results show that the Gibbs free energy differences between
open and close structures of B12X7 become larger when heavier halogen atoms are
present. This interesting finding was subsequently investigated by energy
decomposition analysis
Employees' self-esteem in psychological contract: workplace ostracism and counterproductive behavior
Purpose: Counterproductive work behavior (CWB) has grown into a significant problem in the tourism industry, for both individual employees and organizations. Employees who feel ostracized in their workplace often engage in negative and disruptive behaviors. The purpose of this study is to explore the psychological mechanism between workplace ostracism and CWB among tourism employees. Design/methodology/approach: Drawing on psychological contract theory and social cognitive theory, the study proposed a research framework to explain tourism employees' counterproductive behavior. Data were collected from 228 hotel employees at two time points in Huangshan, China. Hierarchical regression and SPSS-PROCESS Macro were used to test all the hypotheses. Findings: Findings show that workplace ostracism significantly increases employee CWB, mediated by psychological contract violation. Workplace ostracism increases perceptions of psychological contract violation when employee self-esteem is higher. The mediating effect of psychological contract violation is also moderated by self-esteem. Orginality/value: Using the framework of psychological contract theory and social cognitive theory, the authors advance the organizational behavior literature in the tourism field. The authors contextualize the uniqueness of Chinese workplace behavior and highlight the need to understand "losing face (mianzi) view" in workplace relationships. This research contributes to better understanding the dark side of tourism workplace behavior by examining the effects of psychological contract violation and employee's self-esteem on workplace ostracism and CWB
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