Teaching mechanism empowered by virtual simulation: Edge computing–driven approach

With the rapid development of network and communication techniques,the teaching forms have become diversified.To enhance the education experience and improve the teaching environment,an increasing number of educational institutions have adopted virtual simulation technology.A typical teaching mechanism is to exploit Virtual Reality(VR)technology,which affords participants an immersive experience.Unquestionably,such a VRbased mode is highly approved.However,the performance of this technology requires further optimization.On one hand,for VR 360video,the current intraframe decision cannot adapt to rapid response demands.On the other hand,the generated data size is considerably large and fast computation may not be realized,depending on the local VR device.Therefore,this study proposes an improved teaching mechanism empowered by edge computing–driven VR,called VE4T,that involves two parts.First,an intraframe decision algorithm for VR 360videos is devised to realize the rapid responses.Second,an edge computing framework is proposed to offload some tasks to an edge server for computation,where a task scheduling strategy is developed to check whether a task needs to be offloaded.Finally,experiments are performed using a practical teaching scenario with some VR devices.The obtained results demonstrate that VE4T is more efficient than existing mechanisms.

"Love" Is the Origin of All Dances

The art of dance comes from life;it is a reflection and portrayal of life. It is based on people's ambitions for a better life and carries beautiful wishes. These beautiful roots are ultimately derived from "love", in the dance based on the image of people. Dance art expresses the love between people, the love of human and nature, the love of human and society;in the dance works based on the object, the intrinsic connection between nature and the natural world is also reflected. This paper expounds the cognition of dance in terms of children's dance enlightenment, limb development, aesthetic education, etc., and promotes the continuous development of the dance cause, cultivates more outstanding dancers, and creates more excellent dance works.

Chinese Folk Dance -Taking Uighur Dance as an Example

Chinese folk dance has a long history and is quite abundant. It is an indispensable source of Chinese classical dance, court dance and professional dance creation. Chinese folk dances are characterized by unpretentiousness, diverse forms, rich content, and vivid images. But these require professional dancers to express through professional training. Even amateur dances need to be completed through well-trained and emotionally full actors.⑴ In the process of training, in addition to the necessary basic skills and other physical training, we also need to train the demeanor. We often say that the eyes are the windows of the soul, and the folk dance is more about expressing a feeling to the audience. If the dancer don't have a good performance and face expression, he or she can't express the dance work at all. Therefore, this article takes the training of national folk dance as the starting point, combining technical training, stage perfonnance, professional dancers and amateur dancers, taking the Uygur as an example.

Effects of dietary supplementation of Bacillus subtilis DSM 32315 on growth,immune response and acute ammonia stress tolerance of Nile tilapia(Oreochromis niloticus)fed with high or low protein diets

Aquatic animals have benefited from Bacillus subtilis-based probiotics over the past few decades.This study evaluated the effects of B.subtilis DSM 32315 probiotics as a feed additive on growth,immune response and resistance to acute ammonia challenge in Nile tilapia.Specifically,four supplemental levels(0%,0.1%,0.2%,and 0.3%)of B.subtilis probiotics were tested under two dietary protein levels(32%and28%).Five replicate tanks were randomly allotted to each dietary treatment,with each tank containing 30Nile tilapia.After 8 weeks of feeding,Nile tilapia in each tank were exposed to 43.61 mg/L of total ammonia nitrogen for 48 h.The results revealed that reducing protein levels from 32%to 28%did not affect growth performance or antioxidant capacity.However,the low protein diet tended to induce an inflammatory effect shown by increased expressions of TGF-βand IFN-γgenes(P<0.05)in the liver.The impact was alleviated by the probiotic supplementation.Compared with the non-supplemented group,0.1%probiotic supplementation remarkably increased plasma lysozyme activity,total antioxidant capacity and complement C3 and interleukin-10 mRNA levels(P<0.05)in the 28%protein diet,while higher supplementation of probiotics(0.3%)was shown to be beneficial for the high protein diet(32%).In both the dietary protein levels,0.1%supplementation of probiotics promoted the antioxidant capacity of Nile tilapia before exposure to ammonia stress but higher probiotic supplementation(0.3%)proved to be necessary under ammonia stress as evidenced by higher fish survival rate.Results exhibited that supplementation with B.subtilis probiotics had a better effect on the intestinal morphology(villi height and width)regardless of protein levels.In conclusion,dietary supplementation of B.subtilis DSM 32315probiotics at 0.1%in the low protein diet and up to 0.3%in the high protein diet showed beneficial effects on the growth,immunity,and antioxidant capacity of Nile tilapia.Under ammonia stress conditions,the higher supplementation of B.subtilis DSM 32315 probiotics at 0.3%improves stress tolerance of Nile tilapia despite the two dietary protein levels(32%;28%).

Epigenetic checkpoint blockade:new booster for immunotherapy

In a recent study published in Nature,Griffin et al.reported that blockade of SETDB1 enhances anti-tumor immune response,shedding new light on the potential epigenetic therapy to specifically improve immune checkpoint blockade(ICB)effectiveness.

Novel voltage signal at proximity-induced superconducting transition temperature in gold nanowires

We observed a novel voltage peak in the proximity-induced superconducting gold(Au) nanowire while cooling the sample through the superconducting transition temperature. The voltage peak turned dip during warming. The voltage peak or dip was found to originate respectively from the emergence or vanishing of the proximity-induced superconductivity in the Au nanowire.The amplitude of the voltage signal depends on the temperature scanning rate, and it cannot be detected when the temperature is changed slower than 0.03 K/min. This transient feature suggests the non-equilibrium property of the effect. Ginzburg-Landau model clarified the voltage peak by considering the emergence of Cooper pairs of relatively lower free energy in superconducting W contact and the non-equilibrium diffusion of Cooper pairs and quasiparticles.