The density collapse was observed in the improved confinement mode sustained by the hot cathode biasing in Tohoku University Heliac (TU-Heliac). The density profiles showed the steep gradient around the core plasma region before the collapse. The steep density profile collapsed accompanied with the bursting high frequency fluctuation (100 < f < 500 kHz), which had m = 2 ~ 3 poloidal mode number...

The recent achievement in the simulation study of multi-scale interaction among MHD, turbulence and transport is reported. Firstly, we discuss the formation and collapse of Internal Transport Barrier (ITB) in Tokamaks. The meso-scale structures are generated by three-wave interaction among drift wave turbulence. These structures interact each other, which generate the global mode around barrier...

Generative Adversarial Networks (GANs) have shown compelling results in various tasks and applications recent years. However, mode collapse remains a critical problem GANs. In this paper, we propose novel training pipeline to address the issue of Different from existing methods, generalize discriminator as feature embedding maximize entropy distributions space learned by discriminator. Specific...

According to Burrows et al.’s acoustic mechanism for core-collapse supernova explosions, the primary, l = 1, g-mode in the core of the proton-neutron star is excited to an energy of ∼ 10 ergs and damps by the emission of sound waves. Here we calculate the damping of the primary mode by the parametric instability, i.e., by nonlinear, 3-mode coupling between the low-order primary mode and pairs o...

The gravitational condensation of a collapsing dust mass is always inhibited by the acoustic viscosity, restricting thereby the unstable scale size. In this paper we show that, if some of the dust particles (in the collapsing mass) are ionised due to plasma environment, a new mode of Jeans condensation namely the Pulsational Mode of the Gravitational Collapse (PMGC) seems to be a likely phenome...

We extend the investigation of the gravitational collapse of a spherically symmetric Yang-Mills field in Einstein gravity and show that, within the black hole regime, a new kind of critical behavior arises which separates black holes formed via type I collapse from black holes formed through type II collapse. Further, we provide evidence that these new attracting critical solutions are in fact ...

Recently, the applications of ultrasound transducers expanded from high-end diagnostic tools to point care devices and wireless power receivers for implantable devices. These new additionally require that transducer technology must comply biocompatibility manufacturing scalability. In this respect, Capacitive Micromachined Ultrasound Transducers (CMUTs) have a strong advantage compared conventi...

A phenomenological theory of mode collapse-revival for a system with a weak nonlinearity is presented. The theory takes into account fluctuations of the number n of quanta of oscillations. The collapse time τ −1 c for a mode of frequency ω 0 turns out to be ω 0 (n/2¯ hω 0 | ν |), where ν is a coefficient in a nonlinear correction to the mode frequency with respect to the oscillation energy E. F...