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We present a prototype of a personalized recipe advice system, whichfacilitates its users to make health-aware meal choices based onpast selections.To stimulate the adaptation of a healthier lifestylea goal setting mechanism is applied in combination with personalizedrecipe suggestions.

Prolonged sitting time is a potential health risk, not only for people with an inactive lifestyle, but also for those who do meet the recommended amount of physical activity. In this paper, we evaluate SitCoach, a mobile application to nudge people from their seats. SitCoach monitors physical activity and sedentary behavior to provide timely feedback by means of suggesting sitting breaks. A pilot experiment with a group of 8 users learned that the general awareness of the importance of sitting breaks is low. Combined with the belief that the ability to take sitting breaks is highly dependent on externalfactors, a strategy of proposing break reminders may not be the most successful for this target group. Future work should focus on creating awareness of the problem and providing insights into personal sitting behavior.

This technical note is based on Bram Braat's master's thesis, written as a Industrial Design student at the Eindhoven University of Technology. The project was conducted at the User Experiences group in the context of the Hospitality project. The goal of this student project was to design a product or system that creates social interaction between people in a (semi-)public place. In this case to let tourists exchange experiences with each other in a hotel lobby. Tourist carry a lot of touristic experiences, for example information about nice restaurants, bars, best visiting times of museums, current events, unknown sights etc. Currently there is not much exchangeof this information while advice of other tourists appeared to be given more value than information by guiders or the tourist information. Based on this, a literature review towards social interaction in public places and an analysis of the context several concepts were created for systems that would enable social interaction between tourists. Throughout an iterative process these concepts were evaluated and developed using scenarios and experiential prototypes. This iterative process had a high user involvement with several user evaluations. This resulted in a final concept called the CityTIP system, where TIP stands for: 'Tourist Inspiring Pictures'. This system enables tourists to share their touristic photos with other guests as well gives them inspiration for exploring the city. The CityTIP system has been evaluated in a lab test to investigate thesocial interaction and general acceptance of the system. Based on these results a setup for further research is proposed, a setup for a more extensive lab test and a setup for a field test in ahotel lobby of a real hotel.

Prolonged sitting is a potential health risk, not only for people with an inactive lifestyle, but also for those who do meet the recommended amount of physical activity. In this paper, we present two waysto promote the reduction of sedentary behavior. First, we report onan experiment in which office workers (n = 40) received timely persuasive messages on their smartphones, advising them to take an active break whenever 30 minutes of almost uninterrupted computer activity was recorded. The messages resulted in a significant decrease in computer activity and a peak in physical activity, indicating that participants complied to the given advice and took short breaks upon receiving a message. Second, we developed SitCoach, a mobile application to nudge office workers from their seats. SitCoach monitors physical activity and sedentary behavior to provide timely feedback by means of suggested sitting breaks. The results of a user test showedthat the general awareness of the importance of sitting breaks is low. In addition, the ability to take sitting breaks was considered to be highly dependent on external factors. This suggests that raising awareness and increasing self-efficacy are important prerequisitesfor a successful intervention to reduce sedentary behavior.