Colour–magnitude diagrams (CMD) of the SMC star cluster NGC 419, derived from HST/ACS data, reveal a well-delineated secondary clump located below the classical compact red clump typical of intermediate-age populations. We demonstrate that this feature belongs to the cluster itself, rather than to the underlying SMC field. Then, we use synthetic CMDs to show that it corresponds very well to the...

An automatic method for generating sphere clump models of real particles is presented. This is achieved by a process that seeks to optimise the surface correspondence between the sphere clump and a triangular mesh model of the particle. We explore the effect of the number of spheres in the sphere clump model and the extent to which realistic trajectories can be reproduced with DEM simulation. P...

We present a study of hydrodynamic drag forces in smoothed particle simulations. In particular, the deceleration of a resolution-limited cold clump of gas moving through a hot medium is examined. It is found that the drag for subsonic velocities exceeds that predicted by simple physical approximations. This is shown to be a result of the hydrodynamical method which encourages the accretion of p...

Clustering is partitioning a set of observation into groups called clusters, where the observation in the same group has a common characteristic. One of the best known algorithms for solving the microarrays data clustering problem using minimum spanning tree (MST) is CLUMP algorithm (Clustering algorithm through MST in Parallel) which identifies a dense clusters in a noisy background. The MST c...

Abstract Gas accretion is an important process in the evolution of galaxies, but it has limited direct observational evidences. In this paper, we report detection a possible ongoing gas event blue compact dwarf (BCD) galaxy, MaNGA 8313-1901, observed by Mapping Nearby Galaxies and Apache Point Observatory (MaNGA) program. This galaxy distinct off-centered clump to northeast (the NE clump) that ...

Following an approach by Paczy´nski & Stanek we compare red clump stars with parallaxes known to better than 10% in the Hipparcos catalog with the red clump stars observed in three fields in M31 using the HST. There are ∼ 600 and ∼ 6, 300 such stars in the two data sets, respectively. The local red clump luminosity function is well represented by a Gaussian with the peak at M I 0 ,m = −0.23, an...

Overlapping of cervical cells and poor contrast of cell cytoplasm are the major issues in accurate detection and segmentation of cervical cells. An unsupervised cell segmentation approach is presented here. Cell clump segmentation was carried out using the extended depth of field (EDF) image created from the images of different focal planes. A modified Otsu method with prior class weights is pr...

Following an approach by Paczy´nski & Stanek we compare red clump stars with parallaxes known to better than 10% in the Hipparcos catalog with the red clump stars observed in three fields in M31 using the HST. There are ∼ 600 and ∼ 6, 300 such stars in the two data sets, respectively. The local red clump luminosity function is well represented by a Gaussian with the peak at M I 0 ,m = −0.23, an...

An MPI library, called MPICH-PM/CLUMP, has been implemented on a cluster of SMPs. MPICH-PM/CLUMP realizes zero copy message passing between nodes while using one copy message passing within a node to achieve high performance communication. To realize one copy message passing on an SMP, a kernel primitive has been designed which enables a process to read the data of another process. The get prot...