107,699 research outputs found
Does a low solar cycle minimum hint at a weak upcoming cycle?
The maximum amplitude (Rm) of a solar cycle, in the term of mean sunspot
numbers, is well-known to be positively correlated with the preceding minimum
(Rmin). So far as the long term trend is concerned, a low level of Rmin tends
to be followed by a weak Rm, and vice versa. In this paper, we found that the
evidence is insufficient to infer a very weak Cycle 24 from the very low Rmin
in the preceding cycle. This is concluded by analyzing the correlation in the
temporal variations of parameters for two successive cycles.Comment: 5 pages, 2 figures. Accepted by RA
Pointwise wave behavior of the Navier-Stokes equations in half space
In this paper, we investigate the pointwise behavior of the solution for the
compressible Navier-Stokes equations with mixed boundary condition in half
space. Our results show that the leading order of Green's function for the
linear system in half space are heat kernels propagating with sound speed in
two opposite directions and reflected heat kernel (due to the boundary effect)
propagating with positive sound speed. With the strong wave interactions, the
nonlinear analysis exhibits the rich wave structure: the diffusion waves
interact with each other and consequently, the solution decays with algebraic
rate.Comment: Comments and references are added and some typos are corrected.
Accepted by DCDS-
Modelling and Simulations of Multi-component Lipid Membranes and Open Membranes via Diffusive Interface Approaches
In this paper, phase field models are developed for multi-component vesicle
membranes with different lipid compositions and membranes with free boundary.
These models are used to simulate the deformation of membranes under the
elastic bending energy and the line tension energy with prescribed volume and
surface area constraints. By comparing our numerical simulations with recent
experiments, it is demonstrated that the phase field models can capture the
rich phenomena associated with the membrane transformation, thus it offers
great functionality in the simulation and modeling of multicomponent membranes
NMSSM From Alternative Deflection in Generalized Deflected Anomaly Mediated SUSY Breaking
We propose a new approach to generate messenger-matter interactions in
deflected anomaly mediated SUSY breaking mechanism from typical holomorphic
messenger-matter mixing terms in the Kahler potential. This approach is a
unique feature of AMSB and has no analog in GMSB-type scenarios. New coupling
strengths from the scaling of the (already known) Yukawa couplings always
appear in this approach. With messenger-matter interactions in deflected AMSB,
we can generate a realistic soft SUSY breaking spectrum for next-to-minimal
supersymmetric standard model(NMSSM). Successful electroweak symmetry breaking
conditions, which is not easy to satisfy in NMSSM for ordinary AMSB-type
scenario, can be satisfied in a large portion of parameter space in our
scenarios. We study the relevant phenomenology for scenarios with (Bino-like)
neutralino and axino LSP, respectively. In the case of axino LSP, the SUSY
contributions to can possibly account for the muon
discrepancy. The corresponding gluino masses, which are found to below 2.2 TeV,
could be tested soon at LHC.Comment: 25pages, 2 figure
Pointwise wave behavior of the Navier-Stokes equations in half space
In this paper, we investigate the pointwise behavior of the solution for the
compressible Navier-Stokes equations with mixed boundary condition in half
space. Our results show that the leading order of Green's function for the
linear system in half space are heat kernels propagating with sound speed in
two opposite directions and reflected heat kernel (due to the boundary effect)
propagating with positive sound speed. With the strong wave interactions, the
nonlinear analysis exhibits the rich wave structure: the diffusion waves
interact with each other and consequently, the solution decays with algebraic
rate.Comment: Comments and references are added and some typos are corrected.
Accepted by DCDS-
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