Essays about: "quasar"

Showing result 6 - 7 of 7 essays containing the word quasar.

1. 6. The Almighty Quasar — Destroyer of Worlds

   University essay from Uppsala universitet/Observationell astrofysik

   Author : Julia Ahlvind; [2019]
   Keywords : Astronomy; Habitability; Quasars; Active galactic nucleus; AGN;

   Abstract : In the study of habitability of terrestrial exoplanets, both life-supporting conditions and the prevalence of transient life-threatening events need to be considered. One type of hazardous effect that has so far not received much attention is the thermal effect of a nearby active galactic nucleus (AGN), or in this particular case, the class of the AGN known as a quasar. READ MORE

3. 7. Perfusion MRI: Non-Linear Stochastic Regularization for Deconvolution of Model-Free Arterial Spin Labelling Data

   University essay from Lunds universitet/Sjukhusfysikerutbildningen

   Author : Andre Ahlgren; [2011]
   Keywords : MRI; Medicine and Health Sciences;

   Abstract : Introduction: Arterial spin labelling (ASL) is a non-invasive magnetic resonance imaging (MRI) technique for assessment of perfusion. ASL uses magnetically labelled blood water as a diffusible endogenous tracer to measure the perfusion of brain tissue, i.e. the cerebral blood flow (CBF). READ MORE