Kevin P. Reardon

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Context. Filtergrams obtained in Ca II H, Ca II K and Hα are often employed as diagnostics of the solar chromosphere. The vastly disparate appearance between the typical filtergrams in these different lines calls into question the nature of what is actually being observed. Aims. We investigate the lack of obvious structures of magnetic origin such as(More)
Recently, De Pontieu et al. (2007b) discovered a class of spicules that evolves more rapidly than previously known spicules, with rapid apparent motions of 50–150 km s, thickness of a few 100 km, and lifetimes of order 10–60 seconds. These so-called type II spicules have been difficult to study because of limited spatio-temporal and thermal resolution. Here(More)
Following its commissioning in 2019, the Daniel K. Inouye Solar Telescope (DKIST) will be the flagship facility for astrophysical investigations of the full solar atmosphere. The telescope is planned to acquire large volumes (5 PB per year, initially) of heterogeneous data over several decades using several different instruments. We discuss the challenges(More)
There are significant advantages in combining Hinode observations with ground-based instruments that can observe additional spectral diagnostics at higher data rates and with greater flexibility. However, ground-based observations, because of the random effects of weather and seeing as well as the complexities data analysis due to changing instrumental(More)
PURPOSE Vaginal packing for gynecological brachytherapy is used to immobilize the applicator and reduce doses to the bladder and rectum by increasing the separation from the applicator. With the introduction of theRadiadyne Alatus™ balloon packing system, we evaluate further reductions in dose to these structures by increasing the concentration of contrast(More)
PURPOSE Use of heterogeneity correction has only recently been applied in brachytherapy. Vaginal packing with gauze is used in gynecological brachytherapy to physically move the bladder and rectum farther from the applicator, reducing dose to these structures. The Alatus balloon packing system accomplishes the same task, but use of contrast in the balloon(More)
Laser ablation interfaced with inductively coupled plasma-mass spectrometry is described as a new method to determine the presence of phosphorylated proteins on electrophoresis gel blots. The method was applied to the phosphoprotein beta-casein with good detection levels being observed at 16 pmole. Attempts at using the technique to detect beta-casein on(More)
Context. The exact nature of the quiet solar chromosphere, and especially its temporal variations, are still subject of intense debate. One of the contentious issues is the possible role of magnetic field in structuring the quieter solar regions. Aims. We characterize the dynamics of the quiet inter-network chromosphere by studying the occurrence of(More)