Videoprojekt 'Mein geheimes Porto": Anwendung eines Modells für handlungsorientiertes Lernen im universitären Kontext Anette

DE: 2017 wurde Porto zum dritten Mal in der Online-Abstimmung European BestDestinations zum beliebtesten Reiseziel Europas gewählt. Vor diesem Hintergrundwurden im Studienjahr 2016/2017 alle Studierenden der germanistischen Studiengängeder Universität Porto zur Teilnahme an einem Videoprojekt eingeladen. Ziel des Projektsbestand darin, versteckte Winkel ihrer Universitätsstadt zu entdecken und diese auspersönlicher Sicht jenseits des touristischen Mainstreams in selbstproduziertenKurzvideos in deutscher Sprache zu präsentieren.Das Projekt sollte den Studierenden die Möglichkeit bieten, einerseitsfremdsprachliche und mediale Kompetenzen gesamtheitlich und ziel- undhandlungsorientiert anzuwenden, sich andererseits darin eigeninitiativ und konstruktiveinzubringen. Durch die subjektive inhaltliche Relevanz, die Möglichkeit der medialenPartizipation - durch Online-Veröffentlichung der Projektergebnisse - und nicht zuletztdurch die Aussicht auf eine Prämierung wurde eine hohe Resonanz angestrebt, was sichdann auch in der Teilnehmer*innenzahl widerspiegelte.Vor dem Hintergrund einer kommunikativen Fremdsprachendidaktik möchten wir mitdiesem Artikel aufzeigen, inwiefern durch eine handlungs- und aufgabenorientierteVorgehensweise im universitären Fremdsprachenunterricht ein Beitrag zur Förderung selbstverantwortlicher Lernprozesse und fremdsprachlichen Handelns durch einenkonstruktiven, kreativen und produktiven Umgang mit digitalen Ressourcen in einemauthentischen Szenario geleistet werden kann.In 2017, Porto was voted Europe's most popular tourist destination for the third timein the European Best Destinations online poll. Against this background, in the academicyear 2016/2017, all students of German Studies at the University of Porto were invitedto participate in a video project. The aim of the project was to discover hidden corners oftheir university city and to present them from a personal point of view beyond the touristmainstream through self-produced short videos in German.The project was intended to offer students the opportunity to apply foreign-languageand media-related competences in a holistic, goal-oriented and action-oriented manner.In addition, students were invited to take the initiative, making an individual andconstructive contribution. Due to the subjective content relevance, the possibility ofmedia participation - by publishing the project results online - and not least by theprospect of an award, a high level of response was sought. This was reflected in theconsiderable number of participants.Within a framework of communicative approaches to foreign language teaching, wewould like to use this article to show to what extent a contribution to the promotion ofself-reliant learning processes and foreign-language tasks through a constructive,creative and productive use of digital resources in an authentic scenario is achieved,through an action-oriented and task-oriented approach in university language teaching

Nanoscale GaN LED arrays for chip-based optical nanoscope

Since the invention of high-power gallium nitride (GaN) light-emitting diodes (LEDs), enormous investigations have been carried out in the last decade, not only to improve the material quality and device performance but also to extend their applications. InGaN/GaN LEDs have been broadly employed in general illumination and backlight units because of their higher luminous efficacy and longer lifetime compared to conventional light sources. Furthermore, several innovative optoelectronic devices have been introduced into industrial markets (e.g., high-brightness display and optical sensors in smartphones). By integrating LEDs with CMOS control electronics, matrix-addressed and individually controlled GaN microLED arrays could be realized with a display luminance of 106 cd/m2 (12 W/cm2), which is a factor of 103 higher than normal commercial displays [1]. However, their spatial resolution was still low, which resulted from the LED dimensions with pixel and pitch sizes of several micrometers. Thus, in this work, nanoscale InGaN/GaN LED arrays with individual pixel control were designed and fabricated to be integrated as a novel illumination source in a chip-based lensless microscope (i.e., ChipScope) for real-time monitoring of biological cells. The challenging 3D processing steps of the high-aspect-ratio nano-/microLED arrays have been optimized to create tiny optoelectronic modules. To fabricate the well-ordered high-aspect-ratio nano-/microstructures, a top-down approach comprising nanophotolithography and hybrid etching was employed [2]. In this case, GaN LED fins with smooth sidewalls could be realized from the sequential processes of SF6/H2-based ICP-RIE and KOH-based wet chemical etching. As top and bottom surfaces of the structures are distantly separated by about 3.5 – 5 µm, device planarization plays a critical role for the feasibility of top metal contact deposition. Thus, different polymer filling materials have been carefully investigated (e.g., photoresist, spin-on-glass, and benzocyclobutene (BCB)). Along with the device fabrication, simulations of the light emission patterns have been conducted with different conditions of the integrated materials to optimize the nanoLED designs. References J. Herrnsdorf, J. J. D. McKendry, S. Zhang, E. Xie, R. Ferreira, D. Massoubre, A. M. Zuhdi, R. K. Henderson, I. Underwood, S. Watson, A. E. Kelly, E. Gu, M. D. Dawson, “Active-matrix GaN micro light-emitting diode display with unprecedented brightness,” IEEE Transactions on Electron Devices, 62(6), 1918-1925 (2015). DOI: 10.1109/TED.2015.2416915 F. Yu, S. Yao, F. Römer, B. Witzigmann, T. Schimpke, M. Strassburg, A. Bakin, H.W. Schumacher, E. Peiner, H.S. Wasisto, A. Waag, “GaN nanowire arrays with nonpolar sidewalls for vertically integrated field-effect transistors,” Nanotechnology, 28(9), 095206 (2017). DOI: 10.1088/1361-6528/aa57b