By means of a multimass isotropic and spherical model including self-consistently a central intermediate-mass black hole (IMBH), the influence of this object on the morphological and physical properties of globular clusters is investigated in this paper. Confirming recent numerical studies, it is found that a cluster (with mass M) hosting an IMBH (with mass M•) shows, outside the black hole gra...

We are concerned with an inverse problem related to sources detection from boundary data in a 2D medium with piecewise constant conductivity. It stands as a 2D version of the inverse problem of electroencephalography, where pointwise sources model epilepsy foci, with the so-called multi-layer spherical model of the head (scalp, skull, brain). When overdetermined electrical measurements (potenti...

The Karaha-Telaga Bodas geothermal system couples spectacular surface manifestations with an extensive geological and geophysical data set. Examination of fluid inclusions and mineral relationships has allowed development of a thermal history for the system. These data suggest that a quartz diorite intrusion encountered in drill samples provides the heat that drives this system. Delineation of ...

We examined the effect of electrode contact size on EEG measurement sensitivity distributions. We used concentric spheres and realistic head models to evaluate electrode diameters of 1 mm, 5 mm, 10 mm and 15 mm. We used the half sensitivity volume (HSV) to evaluate the results. The spherical model results show that the farther the electrode pairs are spaced (i.e. lower resolution EEG) the more ...

We present a new collapse condition to describe the formation of dark halos via nonspherical gravitational clustering. This new nonspherical collapse condition is obtained by the logical generalization of the spherical model to the nonspherical one. By solving a diffusion-like random matrix equation with the help of the Monte Carlo method, we show that this nonspherical collapse condition yield...

Multidimensional scaling (MDS) is a data analysis technique for representing measurements of (dis)similarity among pairs of objects as distances between points in a low-dimensional space. MDS methods differ mainly according to the distance model used to scale the proximities. The most usual model is the Euclidean one, although a spherical model is often preferred to represent correlation measur...

The performance of six popular continuous-energy Monte Carlo and multigroup transport codes has been compared for a simple spherical model of the Bigten critical assembly using ENDF/B-VII nuclear data. This “code comparison” exercise was supplemented with a few “data testing” results using different nuclear data evaluations. This particular critical assembly was chosen because it is sensitive t...

Using an elaborate set of simulational tools and statistically optimized methods of data analysis, we investigate the scaling behavior of the correlation lengths of three-dimensional classical O(n) spin models. Considering three-dimensional slabs S3S3R, the results over a wide range of n indicate the validity of special scaling relations involving universal amplitude ratios that are analogous t...

Using weakly nonlinear conditional PDF for the density field around an overdense region we find that the expected density contrast around a peak is always smaller while its rms fluctuation larger than in the linear case. We apply these results to the spherical model of collapse as developed by Hoffman & Shaham (1985) and find that in the case of open Universe the effect of weakly nonlinear inte...

We study the evolution of the cosmic mass density contrast beyond the Robertson-Walker geometry including the small contribution of acceleration. We derive a second-order evolution equation for the density contrast within the spherical model for CDM collissionless fluid including the cosmological constant, the expansion and the non-vanishing four-vector of acceleration. While the massdensity is...