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Object-orientation (OO) is a key concept of current software development approaches. Most of the students, who start their studies in the field of computer science, have no prior software engineering experience.
A programming course implementation, which only involves virtual aspects of programming, can be an issue for beginners. The missing correlation of virtual objects in code and real objects in the physical world makes the learning process of object-oriented thinking more difficult.
The fischertechnik Training Factory Industry 4.0 shall be used to support this learning step. The factory consists of six TXT-controllers (TXT) with ARM processors. Each of these controllers manage one specific part of the factory. An object-oriented application programming interface (API), which represents individual parts of this factory, shall be developed. There shall be a 1-to-1 relationship between each factory component and the respective programming element. By letting students use this interface, they can instantaneously see the consequences of their programs on the physical factory. With this learning arrangement we want students to increase their competencies in object-orientation.
Group III nitrides are promising materials for light emitting diodes (LEDs). The occurrence of structural defects strongly affects the efficiency of these LEDs. We investigate the optical properties of basal plane stacking faults (BFSs), and the assignment of specific spectral features to distinct defect types by direct correlation of localized emission bands measured by cathodoluminescence in a scanning electron microscope with defects found in high resolution (scanning) transmission electron microscopy and electron beam induced current at identical sample spots. Thus, we are able to model the electronic structure of BSFs addressing I-1, I-2, and E type BSFs in GaN and AlGaN with low Al content. We find hints that BSFs in semipolar AlGaN layers cause local changes of the Al content, which strongly affects the usability of AlGaN as an electron blocking layer in nitride based LEDs.