Physical Sciences and Mathematics Commons^™

Dark Matter Halo Mass Function From Hpc N-Body Simulations, Da Bi, Isaac Shlosman, Emilio Romano-Diaz

Commonwealth Computational Summit

Dark matter (DM) dominates the matter in the Universe. Because of self-gravity, DM collapses and becomes clumpy, building the large-scale hierarchical structures. Baryons assemble within DM potential wells and form galaxies.

Because we can not directly observe DM halos, numerical simulations is the only way one can study their dynamics and other properties. Using N-body simulations, we can obtain the Halo Mass Function (HMF), which provides the abundance of DM halos as a function of their mass. The HMF depends weakly on cosmological redshift and is one of the basic tools in modern cosmology.

We use GIZMO --- a flexible, …

Use Of Hpc To Analyze Changes In Gene Expression During Fruit Fly Spermiogenesis, Sepideh Dadkhah, Douglas A. Harrison, Jeramiah J. Smith

Commonwealth Computational Summit

In the fruit fly, Drosophila melanogaster, JAK/STAT signaling during spermiogenesis is known to play a crucial role in the maintenance of stem cells of the testis. Recent studies in our lab have shown that activation of the JAK/STAT pathway in somatic cyst cells is also required for the later stages of spermiogenesis like individualization.

The main goal of this project is to characterize the events downstream of JAK/STAT signaling in spermiogenesis and more specifically to determine the mechanism by which JAK/STAT activation regulates individualization, a later stage in spermiogenesis where 64 individual spermatids are formed from a 64-interconnected spermatid …