44 research outputs found
Human Immunodeficiency Virus (HIV)
Magnetic Resonance Imaging (MRI) for the evaluation of patients infected with human immunodeficiency virus (HIV), as with most other forms of intracranial inflammatory or infectious diseases, is a powerful though largely nonspecific diagnostic tool. For imaging of these complex patients with the varied and numerous pathologies they may harbor, the standard protocol is utilized to include gadoliniumâenhanced sequences. This unit presents optional imaging sequences, including magnetic resonance diffusion (dMRI), magnetic resonance perfusion (pMRI), and magnetic resonance spectroscopy (MRS), that can be employed should patient tolerance allow and if specific the clinical situation requires further clarification.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/145277/1/cpmia0403.pd
Variable Modified Chaplygin Gas in Anisotropic Universe with Kaluza-Klein Metric
In this work, we have consider Kaluza-Klein Cosmology for anisotropic
universe where the universe is filled with variable modified chaplygin gas
(VMCG). Here we find normal scalar field and the self interacting
potential to describe the VMCG Cosmology. Also we graphically
analyzed the geometrical parameters named {\it statefinder parameters} in
anisotropic Kaluza-Klein model. Next, we consider a Kaluza-Klein model of
interacting VMCG with dark matter in the Einstein gravity framework. Here we
construct the three dimensional autonomous dynamical system of equations for
this interacting model with the assumption that the dark energy and the dark
matter are interact between them and for that we also choose the interaction
term. We convert that interaction terms to its dimensionless form and perform
stability analysis and solve them numerically. We obtain a stable scaling
solution of the equations in Kaluza-Klein model and graphically represent
solutions.Comment: 11 pages, 13 figure
Loop Quantum Cosmology: An Overview
A brief overview of loop quantum cosmology of homogeneous isotropic models is
presented with emphasis on the origin of and subtleties associated with the
resolution of big bang and big crunch singularities. These results bear out the
remarkable intuition that John Wheeler had. Discussion is organized at two
levels. The the main text provides a bird's eye view of the subject that should
be accessible to non-experts. Appendices address conceptual and technical
issues that are often raised by experts in loop quantum gravity and string
theory.Comment: To appear in the Proceedings of the Bad Honef Workshop entitled
\emph{Quantum Gravity: Challenges and Perspectives}, dedicated to the memory
of John A. Wheele