We focus on a family of shell elements which are a direct generalization of the shell elements most commonly used in engineering practice. The elements in the family include the effects of the through-the-thickness normal stress and can be employed to couple directly with surrounding media on either surfaces of the shell. We establish the “underlying” mathematical model of the shell discretizat...

Statistical features of ”bursty” behaviour in charged and neutral fluid turbulence, are compared to statistics of intermittent events in a GOY shell model, and avalanches in different models of Self Organized Criticality (SOC). It is found that inter–burst times show a power law distribution for turbulent samples and for the shell model, a property which is shared only in a particular case of t...

We have developed a meta-model for Business applications. To generate applications using this meta-model we created a Component Based EBusiness Application Development and Deployment Shell; CBEADS. The meta-model we created was based on three abstraction levels: Shell, Applications and Functions. The Shell provides the functionality common to any Web-based Business Application, and a set of con...

A sigma model with four-dimensional target space parametrized by chiral and twisted chiral N =(2, 2) superfields can be extended to N =(4, 4) supersymmetry off-shell, but this is not true for a model of semichiral fields, where the N = (4, 4) supersymmetry can only be realized on-shell. The two models can be related to each other by T-duality. In this paper we perform a duality transformation f...

We investigate the dust composition of detached shells around carbon stars, with a focus to understand the origin of the cool magnesium-sulfide (MgS) material around warm carbon stars, which has been detected around several of these objects (Hony et al. 2002). We build a radiative transfer model of a carbon star surrounded by an expanding detached shell of dust. The shell contains amorphous car...

Shell-model interactions are constructed in the cross-shell model space connecting the Op and ls0d shells with due regard for the perturbative efFects of the neighboring Os and Oflp shells. The interactions have three distinctive Op-shell, cross-shell, and 1sOd-shell parts. The latter is taken to be the previously determined W interaction. The Op-shell interaction is represented by two-body mat...

Abstract– This article describes an investigation into the free vibration of double-walled carbon nanotubes (DWCNTs) using a nonlocal elastic shell model. Eringen’s nonlocal elasticity is implemented to incorporate the scale effect into the Donnell shell model. Also, the van der Waals interaction between the inner and outer nanotubes is taken into account. A new numerical solution method from i...

We have performed shell-model calculations of the half-lives and neutron-branching probabilities of the r-process waiting point nuclei at the magic neutron number N = 82. These new calculations use a larger model space than previous shell model studies and an improved residual interaction which is adjusted to recent spectroscopic data around A = 130. Our shell-model results give a good account ...

In atomic nuclei, ordered and chaotic states generally coexist. In this paper the transition from ordered to chaotic states will be discussed in the framework of roto–vibrational and shell models. In particular for 160Gd, in the roto–vibrational model, the Poincarè sections clearly show the transition from order to chaos for different values of rotational frequency. Furthermore, the spectral st...