6,961 research outputs found
Detecting the Influence of Spreading in Social Networks with Excitable Sensor Networks
Detecting spreading outbreaks in social networks with sensors is of great
significance in applications. Inspired by the formation mechanism of human's
physical sensations to external stimuli, we propose a new method to detect the
influence of spreading by constructing excitable sensor networks. Exploiting
the amplifying effect of excitable sensor networks, our method can better
detect small-scale spreading processes. At the same time, it can also
distinguish large-scale diffusion instances due to the self-inhibition effect
of excitable elements. Through simulations of diverse spreading dynamics on
typical real-world social networks (facebook, coauthor and email social
networks), we find that the excitable senor networks are capable of detecting
and ranking spreading processes in a much wider range of influence than other
commonly used sensor placement methods, such as random, targeted, acquaintance
and distance strategies. In addition, we validate the efficacy of our method
with diffusion data from a real-world online social system, Twitter. We find
that our method can detect more spreading topics in practice. Our approach
provides a new direction in spreading detection and should be useful for
designing effective detection methods
Industry Labor Force Quality: An Investigation from the Customer Service Perspective
To investigate the labor force quality deficiency in the Macao casino industry, this study conducted a survey among Macao casino guests on their assessment of customer service. The mean scores of different service features were calculated and compared across casinos operated by different casino companies. Furthermore, different service features were examined for their importance to the overall customer satisfaction based on an estimated regression model. The study found that most of the service features were below satisfactory rating, but Wynn Resorts stood out as the top performer among the four gaming companies. The regression model identified respect , smile and skill as the most important contributors to overall customer satisfaction. The findings suggest that to become a top gaming destination, Macao must strengthen its labor force quality in both technical and interpersonal skills
Persistence in an antiferromagnetic Ising model with conserved magnetisation
We obtain the persistence exponents for an antiferromagnetic Ising system in
which the magnetisation is kept constant. This system belongs to Model C
(system with non-conserved order parameter with a conserved density) and is
expected to have persistence exponents different from that of Model A (system
with no conservation) but independent of the conserved density. Our numerical
results for both local persistence at zero temperature and global persistence
at the critical temperature however indicate that the exponents are dependent
on the conserved magnetisation in both two and three dimensions. This
nonuniversal feature is attributed to the presence of the conserved field and
is special to the persistence phenomena.Comment: 8 pages, to be published in Physica A (Proceedings of the
Statphys-Kolkata IV, 2002
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