Hardin Bauer (greenseeder11)

We investigate the topological supersolid states of dipolar Fermi gases trapped in a spin-dependent 2D optical lattice. Our results show that topological supersolid states can be achieved via the combination of topological superfluid states with the stripe order. Different from the general held belief that supersolid state in fermionic system can only survive with simultaneous coexistence of the repulsive and attractive dipolar interaction. We demonstrate that it can be maintained when the dipolar interaction is attractive in both x and y direction. By adjusting the ratio of hopping amplitude between different directions and dipolar interaction strength U, the system will undergo a phase transition among p x + ip y superfluid state, p y -wave superfluid state, and the topological supersolid state. The supersolid state in the attractive environment is proved to be stable by the positive sign of the inverse compressibility. We also design an experimental protocol to realize the staggered next-next-nearest-neighbor hopping via the laser assisted tunneling technique, which is the key to simulate the spin-dependent potential.Spinal cord injury is a devastating trauma with high mortality and disability, for which there is no effective treatment. Stem-cell based tissue engineering has been reported to promote neural functional recovery. Presently, building a neural scaffold with excellent biocompatibility for cells and tissues is still challenging. In this study, a new thermosensitive composite hydrogel based on chitosan, hydroxyethyl cellulose, collagen, and β-phosphoglycerate (CS-HEC-Col/GP hydrogel) is developed to encapsulate murine bone marrow-derived mesenchymal stem cells (BMSC) for improving the therapeutic efficacy of spinal cord injury mice. This composite hydrogel possesses a good cytocompatibility to mice BMSC by the Live/Dead staining, minimized inflammatory reaction in vivo by hematoxylin and eosin staining, and suitable rheological behavior similar with neural tissue ranging from 100 to 1000 Pa. Furthermore, the animal experiments data indicated that BMSC loaded CS-HEC-Col/GP hydrogel could enhance the survival or proliferation of endogenous nerve cells probably by secreting neurotrophic factors and inhibiting apoptosis, and thereby promote the recovery of motor function in hind limbs of murine spinal cord injury model. © 2020 IOP Publishing Ltd.The size, form and distribution function of catalyst particles define the quality of synthesized arrays of carbon nanotubes. In this work, we study the kinetics of catalyst particle formation from the thin nickel film (9 nm) deposited on the silicon substrate (SiO2/Si) with a buffer layer of niobium nitride at the temperature of 880 °C. In the experiment, we have obtained the time dependences of the average radius, average height and concentration of nickel particles. The experimental data are satisfactorily described by simulations based on the wetting transition theory. Comparison of the simulation results and experimental data allows us to estimate the effective interaction potential between the nickel film and buffer layer of niobium nitride. Besides, we have estimated the viscosity of the nickel confirming an undercooled liquid state of the nanosized nickel film at the temperature of 880 °C.Deep convolutional neural network (DCNN) has shown great success in medical image segmentation. However, most studies involve training and testing on the same dataset. Little work has been done to investigate the generalization errors of DCNN on a different dataset. This work investigated the generalization errors observed when apply a well-trained DCNN model to data from our local institution. It was found that even a subtle shift of organs inside patient body, caused by abdominal compression technique used in our institution, can confuse a well-trained DCNN. Incorporating cases from local institution into training process improves the accuracy and robustness of the DCNN model. The n