My main scientific interests are in problems of plasma astrophysics, especially solar and heliospheric physics, from an observational and experimental point of view. Studying the Sun and the heliosphere has an essential advantage over studying other astrophysical objects in that detailed spatially resolved observations and even in-situ observations can be obtained. Over the past two decades, I have been working on problems of how the solar corona is heated, how magnetic energy is converted, how energetic particles are accelerated and how they escape from acceleration sites into interplanetary space. During this time, I have published more than 160 papers in refereed journals addressing these problems, 32 as a first author.