1,758 research outputs found
A novel approach to reconstructing signals of isotropy violation from a masked CMB sky
Statistical isotropy (SI) is one of the fundamental assumptions made in
cosmological model building. This assumption is now being rigorously tested
using the almost full sky measurements of the CMB anisotropies. A major hurdle
in any such analysis is to handle the large biases induced due to the process
of masking. We have developed a new method of analysis, using the bipolar
spherical harmonic basis functions, in which we semi-analytically evaluate the
modifications to SI violation induced by the mask. The method developed here is
generic and can be potentially used to search for any arbitrary form of SI
violation. We specifically demonstrate the working of this method by recovering
the Doppler boost signal from a set of simulated, masked CMB skies.Comment: 8 pages, 3 figure
Multibranch Bogoliubov-Bloch spectrum of a cigar shaped Bose condensate in an optical lattice
We study properties of excited states of an array of weakly coupled
quasi-two-dimensional Bose condensates by using the hydrodynamic theory. The
spectrum of the axial excited states strongly depends on the coupling among the
various discrete radial modes in a given symmetry. By including mode-coupling
within a given symmetry, the complete excitation spectrum of axial
quasiparticles with various discrete radial nodes are presented. A single
parameter which determines the strength of the mode coupling is identified. The
excitation spectrum in the zero angular momentum sector can be observed by
using the Bragg scattering experiments.Comment: to apper in Phys. Rev.
Enriching health-related research through glycobiological approaches
In the Laboratory of Mechanistic Glycobiology at Michigan Technological University, we have been working in four distinct but related areas. Our findings can significantly influence human health-related research. (1) We have documented a molecular strategy that can improve drug designing. (2) We have shown that the tumor-associated protein galectin-3 can create problems in cancer biomarker assays by hiding the biomarkers. (3) In another project, we reported that the role of galectin-3 in cancer could be more complicated than what is reported in the literature. (4) Our team also detected a novel natural product with anti-fungal and anti-cancer activities.https://digitalcommons.mtu.edu/techtalks/1012/thumbnail.jp
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