Information Technology Reference
In-Depth Information
Language preference settings were found to be especially helpful by people with
little proficiency in the German language. At first however, the difference in function-
ality between the language preference slider and the language selection dropdown-
box was not intuitive to some participants and needed to be explained.
Additional Comments
Asking the participants for advice on how to improve the system further, they
suggested that GID should also enrich their results with pictures and videos. They
remarked that reading a lot of text makes interaction with GID unappealing. Addi-
tionally, we noted that the ontology graph helped younger users to understand how
their search results were found, but did not help older users that much.
3.5 Prevention Service
The second service of the health assistant is the prevention service, referred to as PS.
This service consists of two subsystems focusing on nutrition and activity support
for people: a cooking assistant and an activity assistant. In this section, we first
introduce the cooking assistant that uses structured knowledge about food, healthy
eating habits, and user information to build a personalized cooking and eating plan
for a single user or a group of users. Additional services such as a food-shopping
assistant complete a service that allows creating healthy eating behaviors. Then, we
present the virtual trainer which uses 3D-camera techniques to track users doing
exercises at home. To motivate users doing their sports, the trainer combines serious
games to make it more fun with motivational parts such as the combination with the
cooking assistant. If a user makes more sports, the cooking assistant gives positive
feedback by allowing the user to choose “unhealthier” menus.
3.5.1 Nutrition Assistant
The nutrition assistant, shown in Fig.
3.5
, helps users eat in a healthy way. Users
can get a list of cooking recipes that are tailored to their physical activity, medical
conditions, and cultural background. For example, if the user has diabetes, recipes
with high sugar content are avoided. Besides, the interface provides an overview on
how healthy their current lifestyle is with respect to physical activities and nutrition
habits. This helps users to learn about the food they eat.
The assistant provides the user with different cooking sessions. The user can
select their meal from a range of different recipes. For the selection they can choose
different health criteria, their country, the level of difficulty, and the category of
the dishes. In the category they can decide if they want a dessert, a main meal, or
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