9,054 research outputs found
Research on User Resistance Behavior in the Post-Implementation Stage of a Hospital Information System
The development of informatization brings great opportunities for the construction of informatization in hospitals. Hospitals are increasingly dependent on information systems. However, in the process of implementing the hospital information system, user resistance has become an important factor hindering the successful implementation of the system. The existing researches on the causes of user resistance mostly stay in the pre-implementation stage before the introduction of the system. However, the pre-implementation stage does not involve the resistance caused by users\u27 real contact with the system, so the research conclusions are limited. Based on the existing three-factor resistance theory, choosing the resistance in the postimplementation stage of a hospital information system as case study object, starting from the three theoretical perspectives, this paper makes a comprehensive analysis of the reasons for the resistance behavior in the post-implementation stage of the information system, and puts forward that the reasons for the resistance behavior are caused by user motivation, system development technology, network infrastructure, organizational support, organizational management, and other comprehensive caused by multiple factors. Through this study, the conclusions of the existing information system resistance factors research field are further expanded and improved, making the conclusions more comprehensive and specific. This paper not only provides theoretical reference for researchers in related fields, but also provides substantive suggestions for the smooth implementation of information system in hospitals, promotes the transformation of hospital informatization, and improves the level of medical service and social health
A Cluster-Based Computational Thermodynamics Framework with Intrinsic Chemical Short-Range Order: Part I. Configurational Contribution
Exploiting chemical short-range order (SRO) is a promising new avenue for
manipulating the properties of alloys. However, existing modeling frameworks
are not sufficient to understand and predict SRO in multicomponent (>3) alloys.
In this work, we developed a hybrid computational thermodynamics framework by
marrying unique advantages from CVM (Cluster Variation Method) and CALPHAD
(CALculation of PHAse Diagram) method through incorporating chemical SRO into
CALPHAD with a novel cluster-based solution model. The key is to use the
Fowler-Yang-Li transform to decompose the cumbersome cluster chemical
potentials in CVM into fewer site chemical potentials of the basis cluster,
thereby considerably reducing the number of variables that must be minimized
for multicomponent systems. The new framework puts more physics, primarily
intrinsic SRO, into CALPHAD, while maintaining its practicality and efficiency.
It leverages statistical mechanics to yield a more physical description of
configurational entropy and opens the door to cluster-based CALPHAD database
development. The application of this newly proposed model in the prototype FCC
AB system demonstrated that this model can correctly capture the essential
features of the phase diagram and thermodynamic properties. The hybrid
CVM-CALPHAD framework represents a new methodology for thermodynamic modeling
that enables atomic-scale order to be exploited as a dimension for materials
design, which potentially leads to novel complex concentrated alloys. It
achieves a balance between the accuracy and computational cost for modeling
multicomponent alloys with the intrinsic SRO in the context of CALPHAD
The juxtamembrane and carboxy-terminal domains of Arabidopsis PRK2 are critical for ROP-induced growth in pollen tubes.
Polarized growth of pollen tubes is a critical step for successful reproduction in angiosperms and is controlled by ROP GTPases. Spatiotemporal activation of ROP (Rho GTPases of plants) necessitates a complex and sophisticated regulatory system, in which guanine nucleotide exchange factors (RopGEFs) are key components. It was previously shown that a leucine-rich repeat receptor-like kinase, Arabidopsis pollen receptor kinase 2 (AtPRK2), interacted with RopGEF12 for its membrane recruitment. However, the mechanisms underlying AtPRK2-mediated ROP activation in vivo are yet to be defined. It is reported here that over-expression of AtPRK2 induced tube bulging that was accompanied by the ectopic localization of ROP-GTP and the ectopic distribution of actin microfilaments. Tube depolarization was also induced by a potentially kinase-dead mutant, AtPRK2K366R, suggesting that the over-expression effect of AtPRK2 did not require its kinase activity. By contrast, deletions of non-catalytic domains in AtPRK2, i.e. the juxtamembrane (JM) and carboxy-terminal (CT) domains, abolished its ability to affect tube polarization. Notably, AtPRK2K366R retained the ability to interact with RopGEF12, whereas AtPRK2 truncations of these non-catalytic domains did not. Lastly, it has been shown that the JM and CT domains of AtPRK2 were not only critical for its interaction with RopGEF12 but also critical for its distribution at the plasma membrane. These results thus provide further insight into pollen receptor kinase-mediated ROP activation during pollen tube growth
Crosstalk Impacts on Homogeneous Weakly-Coupled Multicore Fiber Based IM/DD System
We numerically discussed crosstalk impacts on homogeneous weakly-coupled
multicore fiber based intensity modulation/direct-detection (IM/DD) systems
taking into account mean crosstalk power fluctuation, walk-off between cores,
laser frequency offset, and laser linewidth.Comment: 3 pages, 11 figures
Inversion formula of multifractal energy dissipation in 3D fully developed turbulence
The concept of inverse statistics in turbulence has attracted much attention
in the recent years. It is argued that the scaling exponents of the direct
structure functions and the inverse structure functions satisfy an inversion
formula. This proposition has already been verified by numerical data using the
shell model. However, no direct evidence was reported for experimental three
dimensional turbulence. We propose to test the inversion formula using
experimental data of three dimensional fully developed turbulence by
considering the energy dissipation rates in stead of the usual efforts on the
structure functions. The moments of the exit distances are shown to exhibit
nice multifractality. The inversion formula between the direct and inverse
exponents is then verified.Comment: 3 RevTex pages including 3 eps figure
Observation of Bulk Fermi Arc and Polarization Half Charge from Paired Exceptional Points
The ideas of topology have found tremendous success in Hermitian physical
systems, but even richer properties exist in the more general non-Hermitian
framework. Here, we theoretically propose and experimentally demonstrate a new
topologically-protected bulk Fermi arc which---unlike the well-known surface
Fermi arcs arising from Weyl points in Hermitian systems---develops from
non-Hermitian radiative losses in photonic crystal slabs. Moreover, we discover
half-integer topological charges in the polarization of far-field radiation
around the Fermi arc. We show that both phenomena are direct consequences of
the non-Hermitian topological properties of exceptional points, where
resonances coincide in their frequencies and linewidths. Our work connects the
fields of topological photonics, non-Hermitian physics and singular optics, and
paves the way for future exploration of non-Hermitian topological systems.Comment: 7 pages, 4 figure
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