Ant Tribe

Ant Tribe describes the post-80s generation university graduates who live together in poor conditions without Social security in communities around China\u27s major metropolises. They dream of a better life in big cities but struggle with low-paying jobs. These struggling elites have become the fourth weak Social group, after peasants, migrant workers and unemployed people. The reason why these college graduates are compared to ants is that they are like ants: clever, hardworking, politically weak and living in groups. The real world is always different from the ideal world of the Ant Tribe in China. They often lose their purposes in a complex society. It is more important for them to recognize the distance between the real and imaginary in order to rethink whether it is a right choice to stay in a big city and try to realize their dreams. The intention of the Ant Tribe installation is to explore the process and concept of changing between the real and fantasy. In the installation, I hope to portray the Ant Tribe phenomenon widely and deeply from an artist\u27s perspective. The most important thing for me is using my artistic practice to investigate the power of the media over the contemporary subject in order to activate the viewers to question some Social issues regarding humanity consciousness. My artwork should be thought - provoking for them. I would like to use my visual language to convey specific Social issues to inquire how far the viewers are from their dreams. I hope they think about themselves in their complex society physically and psychologically when they go through my work

Efficient Numerical Evaluation of Feynman Integral

Feynman loop integrals are a key ingredient for the calculation of higher order radiation effects, and are responsible for reliable and accurate theoretical prediction. We improve the efficiency of numerical integration in sector decomposition by implementing a quasi-Monte Carlo method associated with the CUDA/GPU technique. For demonstration we present the results of several Feynman integrals up to two loops in both Euclidean and physical kinematic regions in comparison with those obtained from FIESTA3. It is shown that both planar and non-planar two-loop master integrals in the physical kinematic region can be evaluated in less than half a minute with $\mathcal{O}(10^{-3})$ accuracy, which makes the direct numerical approach viable for precise investigation of higher order effects in multi-loop processes, e.g. the next-to-leading order QCD effect in Higgs pair production via gluon fusion with a finite top quark mass.Comment: 8 pages, 5 figures, published in Chinese Physics

Finite-Difference Time-Domain Study of Guided Modes in Nano-plasmonic Waveguides

A conformal dispersive finite-difference time-domain (FDTD) method is developed for the study of one-dimensional (1-D) plasmonic waveguides formed by an array of periodic infinite-long silver cylinders at optical frequencies. The curved surfaces of circular and elliptical inclusions are modelled in orthogonal FDTD grid using effective permittivities (EPs) and the material frequency dispersion is taken into account using an auxiliary differential equation (ADE) method. The proposed FDTD method does not introduce numerical instability but it requires a fourth-order discretisation procedure. To the authors' knowledge, it is the first time that the modelling of curved structures using a conformal scheme is combined with the dispersive FDTD method. The dispersion diagrams obtained using EPs and staircase approximations are compared with those from the frequency domain embedding method. It is shown that the dispersion diagram can be modified by adding additional elements or changing geometry of inclusions. Numerical simulations of plasmonic waveguides formed by seven elements show that row(s) of silver nanoscale cylinders can guide the propagation of light due to the coupling of surface plasmons.Comment: 6 pages, 10 figures, accepted for publication, IEEE Trans. Antennas Propaga