11 research outputs found
Modified Heider Balance on Sparse Random Networks
The lack of signed random networks in standard balance studies has prompted
us to extend the Hamiltonian of the standard balance model. Random networks
with tunable parameters are suitable for better understanding the behavior of
standard balance as an underlying dynamics. Moreover, the standard balance
model in its original form does not allow preserving tensed triads in the
network. Therefore, the thermal behavior of the balance model has been
investigated on a fully connected signed network recently. It has been shown
that the model undergoes an abrupt phase transition with temperature.
Considering these two issues together, we examine the thermal behavior of the
structural balance model defined on Erd\H{o}s-R\'enyi random networks. We
provide a Mean-Field solution for the model. We observe a first-order phase
transition with temperature, for both the sparse and densely connected
networks. We detect two transition temperatures, and ,
characterizing a hysteresis loop. We find that with increasing the network
sparsity, both and decrease. But the slope of decreasing
with sparsity is larger than the slope of decreasing .
Hence, the hysteresis region gets narrower, until, in a certain sparsity, it
disappears. We provide a phase diagram in the temperature-tie density plane to
observe the meta-stable/coexistence region behavior more accurately. Then we
justify our Mean-Field results with a series of Monte-Carlo simulations.Comment: 10 Pages, 5 Figure
Status of decayed, missing, filled teeth index among Iranian children and adults: A systematic review and meta-analysis
Introduction: Oral health status is one of the health-related
priorities in Iran. The present study was conducted with the aim to
systematically review the status of oral health in Iran using the decayed,
missing, filled teeth (DMFT) index.
Methods: In
this meta-analysis, all data available on DMFT were reviewed and 35 published
studies were included in the study based on search strategy. To estimate
overall DMFT and perform the meta-analyses, Comprehensive Meta-Analysis (CMA)
software was used.
Results: Of
all 876 articles, 35 were included in the study. A total of 21849 individuals
were included in the meta-analysis. The overall DMFT index was 3.65 [95%
confidence interval (CI), 3.01-4.34]. In addition, this rate was 2.30, 8.60,
and 3.85 among children, adults, and children with mental/physical disabilities
with (CI 95%, 1.76-2.95), (CI 95%, 6.10-9.60), and (CI 95, 2.98-4.80),
respectively.
Conclusion:
Mean DMFT in the assessed published data was higher
than that set forth by the World Health Organization (WHO). Further planning
and taking effective preventive measures to improve the oral health status
seems necessary