We examine the formation of giant elliptical galaxies using their globular cluster (GC) systems as probes of their evolutionary history. The bimodal distributions of GC metallicities in such galaxies are often cited as evidence for the formation of giant elliptical galaxies through mergers involving gas-rich spirals, with the metal-rich GCs forming during the merger process. We explore an alter...

We study the stability of the giant gravitons in the string theory background with NSNS B field. We consider the perturbation of giant gravitons formed by a probe D(8− p) brane in the background generated by D(p− 2)D(p) branes for 2 ≤ p ≤ 5. We use the quadratic approximation to the brane action to find the equations of motion. The vibration modes for ρ , φ and r are coupled, while those of xk’...

Constant time algorithms for the transitive closure and some related graph problems on processor arrays with reconngurable bus systems. In this work we have shown a general construction so that a T steps rn-mesh of size n n can be simulated by a single step rn-mesh, where the corresponding mesh size increase by a factor of n O(T). The construction itself is simpler and smaller as compared to a ...

Paying off the mortgage, once a widespread rite of passage for homeowners approaching retirement, has become less common in recent years. Concerns are mounting that the increased prevalence of housing debt among older homeowners could compromise financial security in retirement by expanding housing affordability problems, crimping essential nonhousing spending, increasing vulnerability to home ...

The recon gurable mesh (rn-mesh) can solve a large class of problems in constant time, including problems that require logarithmic time by other, even shared memory, models such as the pram with a similar number of processors [3]. In this work we show that for the rn-mesh these constants can always be reduced to one, still using a polynomial number of processors. Given a recon gurable mesh that...

The volume of raw range image data that is required to represent just a single scene can be extensive; hence direct interpretation of range images can incur a very high computational cost. Range image segmentation and feature extraction have been identified as mechanisms to produce more compact scene representations and hence enable less costly scene interpretation for applications such as obje...

Abstract Due to the precision and sizing requirements of popular semiconductor devices nowadays, thickness control uniformity optimization photoresist during photolithography process are thought be critical issues for engineers consider. In this paper, parameters affecting thoroughly analyzed an economic novel approach improving spin coating is presented. Integrated Nanosystems Research Facilit...