9,117 research outputs found
Ferromagnetic to antiferromagnetic transition of one-dimensional spinor Bose gases with spin-orbit coupling
We have analytically solved one-dimensional interacting two-component bosonic
gases with spin-orbit (SO) coupling by the Bethe-ansatz method. Through a gauge
transformation, the effect of SO coupling is incorporated into a spin-dependent
twisted boundary condition. Our result shows that the SO coupling can influence
the eigenenergy in a periodical pattern. The interplay between interaction and
SO coupling may induce the energy level crossing for the ground state, which
leads to a transition from the ferromagnetic to antiferromagnetic state.Comment: 6 pages, 4 figure
Scaling in the distribution of intertrade durations of Chinese stocks
The distribution of intertrade durations, defined as the waiting times
between two consecutive transactions, is investigated based upon the limit
order book data of 23 liquid Chinese stocks listed on the Shenzhen Stock
Exchange in the whole year 2003. A scaling pattern is observed in the
distributions of intertrade durations, where the empirical density functions of
the normalized intertrade durations of all 23 stocks collapse onto a single
curve. The scaling pattern is also observed in the intertrade duration
distributions for filled and partially filled trades and in the conditional
distributions. The ensemble distributions for all stocks are modeled by the
Weibull and the Tsallis -exponential distributions. Maximum likelihood
estimation shows that the Weibull distribution outperforms the -exponential
for not-too-large intertrade durations which account for more than 98.5% of the
data. Alternatively, nonlinear least-squares estimation selects the
-exponential as a better model, in which the optimization is conducted on
the distance between empirical and theoretical values of the logarithmic
probability densities. The distribution of intertrade durations is Weibull
followed by a power-law tail with an asymptotic tail exponent close to 3.Comment: 16 elsart pages including 3 eps figure
Introduction Of A Smart Diet Manager In IoT
Excessive consumption leads to 7 trends of crises, including destruction of the atmosphere, energy crisis, social decline and conflicts. Over consumption also deteriorates human health. To reduce excessive consumption not only can improve health, it can also reduce transportation from consumption, livestock raise and sale, and medical care. The reducing over consumption can benefit human health and environmental protection through supply chain management. This motivates us to devise an innovative product. Our imaginative innovative product is a new smart diet manager (DM). After a survey to potential users, it reveals that the new features can help reduce the excessive consumption and deterioration of the human health as well as the destruction of environment. Enterprises can also achieve their social responsibilities through the implementation and popularization of the DM as soon as possible
Chemical logic gates on active colloids
Synthetic active colloidal systems are being studied extensively because of
the diverse and often unusual phenomena these nonequilibrium systems manifest,
and their potential applications in fields ranging from biology to material
science. Recent studies have shown that active colloidal motors that use
enzymatic reactions for propulsion hold special promise for applications that
require motors to carry out active sensing tasks in complicated biomedical
environments. In such applications it would be desirable to have active
colloids with some capability of computation so that they could act
autonomously to sense their surroundings and alter their own dynamics to
perform specific tasks. Here we describe how small chemical networks that make
use of enzymatic chemical reactions on the colloid surface can be used to
construct motor-based chemical logic gates. Some basic features of coupled
enzymatic reactions that are responsible for propulsion and underlie the
construction and function of chemical gates are described using continuum
theory and molecular simulation. Examples are given that show how colloids with
specific chemical logic gates can perform simple sensing tasks. Due to the
diverse functions of different enzyme gates, operating alone or in circuits,
the work presented here supports the suggestion that synthetic motors using
such gates could be designed to operate in an autonomous way in order to
complete complicated tasks
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