An Observational Overview of Solar Flares

We present an overview of solar flares and associated phenomena, drawing upon a wide range of observational data primarily from the RHESSI era. Following an introductory discussion and overview of the status of observational capabilities, the article is split into topical sections which deal with different areas of flare phenomena (footpoints and ribbons, coronal sources, relationship to coronal mass ejections) and their interconnections. We also discuss flare soft X-ray spectroscopy and the energetics of the process. The emphasis is to describe the observations from multiple points of view, while bearing in mind the models that link them to each other and to theory. The present theoretical and observational understanding of solar flares is far from complete, so we conclude with a brief discussion of models, and a list of missing but important observations.Comment: This is an article for a monograph on the physics of solar flares, inspired by RHESSI observations. The individual articles are to appear in Space Science Reviews (2011

Using Log-Data as a Starting Point to Make eHealth More Persuasive

Despite the large number of eHealth projects to date and the positive outcomes of evaluation studies, the adherence to eHealth interventions is lower than expected. To understand how persuasive technology can influence the adherence to eHealth interventions process data (log-data) about the usage of technology (system and content) can provide a starting point for employment of persuasive features into the design of technology. The log-data of the usage of an eMental health intervention used as an example in this paper, contained a record of actions taken by each participant with for each action the following information: user-id; action type; action specification; time and day. The log-data showed critical episodes for employment of persuasive components to increase adherence: episodes to determine the willingness to follow a therapy, awareness of their non-coping strategies, adoption of “new” skills for behavior change