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Fig. 3.5 Screenshot of the nutrition assistant
a vegetarian meal. Furthermore, they can select if they eat alone or with another
family member. Therefore, they have the possibility to preset the likes and dislikes
or diseases of the persons. When connected to a smart home, the system can also be
used to control the domestic appliances such as the stove or the microwave. After the
step-by-step cooking sessions the dinner will be ready. In some cases the cooking
sessions are video-tailored. Furthermore, the cooking assistant gives an overview of
all ingredients needed for the meal. So the user has the possibility to create their
own shopping list and can send it to one of the family members. The user also gets
nutrition information about their meal so that they have an overview of the calories,
protein, carbohydrates, sugar, fat, and fibers.
3.5.2 Activity Assistant
The activity assistant intends to defeat one's weaker self. By using game mechanics
and rewards, people are motivated to do physical exercises at home [ 2 ]. As shown
in Fig. 3.6 , users see a digital trainer who demonstrates an exercise (e.g., Jumping
Jacks) that should be imitated by them. The user has the possibility to select his
trainer of three different figures—women, man, or ogre. The trainer offers the user
three different activity sessions. Users' motions are tracked using a XBOX Kinect
3D camera and compared to the instructed movements. During the training sessions
the virtual trainer is giving a feedback, if the exercises are performed correct or not.
For each activity, the users can earn activity points. The more exercises the users
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