Theses

Bachelor's Thesis

Just-In-Time Intervention: Increasing Young Adults' Fruit Intake in an Engaging way

Consuming fruits is very important to maintain health, however, less than a quarter of European young adults consume an adequate amount of fruits. A just-in-time intervention (JITI) can be used to solve this problem because it can give support in an appropriate situation, like a food choice situation. Although just-in-time interventions are useful, they have a lack of user engagement. Therefore, the focus of this research is to create a just-in-time intervention to increase young adults' fruit intake in an engaging way in a home setting.

To come up with the best solution, the Creative Technology Design Process, which consists of ideation, specification, realization, and user evaluation, was used. The result of this process is to create a smart fruit bowl that gives a just-in-time reminder to eat fruits when the user is in a dining room. The smart fruit bowl also involved fruit facts as user engagement. After the smart fruit bowl was tested for 7 days, it was discovered that the participants felt reminded to eat fruits and were aware of the available fruits.

Master's Thesis

Design and Verification of a Hyperspectral Imaging System for Outdoor Sports Lighting Assessments

This thesis examines the feasibility of hyperspectral imaging (HSI) for airborne outdoor sports lighting measuring, as ground-based lighting measurements require a lot of time and effort. Firstly, the hardware system was designed so that the hyperspectral camera can operate consistently when flying. Secondly, two indoor and one outdoor measurements were conducted to evaluate the spectral, photometric, and colorimetric accuracies of the device.

One of the outcomes of this thesis is an HSI-drone system design that was conceptualized and assembled. The system consists of a hyperspectral camera, a mini PC, a battery, and an industrial drone. A WiFi module is added to establish a robust communication system between the drone and the ground control station. Furthermore, the HSI measurement results shows that the device can obtain good quality spectra, demonstrated by the Normalized Root Mean Square Deviations (NRMSDs) of the spectra which are less than 10% for all samples, except the grayscale color samples. The deviations between the calculated illuminance and the measured illuminance are also insignificant, which are generally less than 9%. The color differences of most of the objects are inferior to 3.5, which satisfies the desired color accuracy. These profound findings imply that the hyperspectral camera is suitable for airborne lighting measurements.