838 research outputs found
A novel exact solution of the 2+1-dimensional radial Dirac equation for the generalized Dirac oscillator with the inverse potentials
The generalized Dirac oscillator as one of the exact solvable model in
quantum mechanics was introduced in 2+1-dimensional world in this paper. What
is more, the general expressions of the exact solutions for these models with
the inverse cubic, quartic, quintic and sixtic power potentials in radial Dirac
equation were further given by means of the Bethe ansatz method. And finally,
the corresponding exact solutions in this paper were further discussed
Topology and Control of Transformerless High Voltage Grid-connected PV System Based on Cascade Step-up Structure
Run for the Group: The Impacts of Offline Teambuilding, Social Comparison and Competitive Climate on Group Physical Activity - Evidence from Mobile Fitness Apps
To encourage users to exercise more and to improve the retention, mobile fitness app developers build apps with more social interaction features on the collective level, such as allowing users to join groups to work out and holding offline group meetup events. However, literature has not provided a clear theory on the impacts of the within-group social comparison and between-group competitive climate on the participation in group exercises. Motivated by this gap, we build a conceptual framework to explain the empirical effects based on the Social Comparison theory. Based on the Teamwork theory, we also propose that offline group team building activities moderate the above relationships. We collect usage data from a mobile fitness app and conduct a series of comprehensive empirical analyses to test and validate the main and moderating effects. Our results show that both the within-group social comparison and the between- group competitive climate can improve group exercise participation. Additionally, the amount of offline activities moderates the main effects in opposite directions. Our findings help fitness app developers to better understand the impacts of offline team building activities on the participation of the online virtual groups, and further, we provide implications regarding how to make online community policies and design gamification incentive mechanism to stimulate and promote offline team building activities
Optimal path selection of innovation resource allocation in China’s regions with shared inputs
As an effective form of interaction between innovation subjects
and resources, the regional innovation network’s optimal allocation of resources is the key to improving national innovation capacity. According to the innovation value chain, the process of
resource allocation in innovation can be divided into two correlative sub-systems: the knowledge innovation stage (KIS) and the
achievements commercialisation stage (ACS). To evaluate regional
innovation efficiency, a two-stage network data envelopment analysis model with shared inputs is used, with fuzzy set qualitative
comparative analysis to analyse the improvement path of
resource allocation efficiency from the dimensions of regional
environment and network structure. The results show that efficiency in the KIS is higher than in the ACS, and the efficiency
scores for most regions in China are better under the model with
shared inputs. The efficiency of innovative resource allocation is
affected by the cross-action of seven factors: regional economic
development, infrastructure, policy system, social culture, network
scale, network openness, and network centrality. To achieve highefficiency resource allocation, regions should build an innovation
network that matches their environmental characteristics. These
findings provide theoretical guidance for formulating innovative
resource allocation policies suitable for different regions
A Study of Consumer Purchase Intentions in E-commerce livestreaming for Eye Health Products Based on Product and Host Discourse Attributes
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