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Obstacle avoidance is critical for unmanned aerial vehicles (UAVs) operating autonomously. Obstacle avoidance algorithms either rely on global environment data or local sensor data. Local path planners react to unforeseen objects and plan purely on local sensor information. Similarly, animals need to find feasible paths based on local information about their surroundings. Therefore, their behavior is a valuable source of inspiration for path planning. Bumblebees tend to fly vertically over far-away obstacles and horizontally around close ones, implying two zones for different flight strategies depending on the distance to obstacles. This work enhances the local path planner 3DVFH* with this bio-inspired strategy. The algorithm alters the goal-driven function of the 3DVFH* to climb-preferring if obstacles are far away. Prior experiments with bumblebees led to two definitions of flight zone limits depending on the distance to obstacles, leading to two algorithm variants. Both variants reduce the probability of not reaching the goal of a 3DVFH* implementation in Matlab/Simulink. The best variant, 3DVFH*b-b, reduces this probability from 70.7 to 18.6% in city-like worlds using a strong vertical evasion strategy. Energy consumption is higher, and flight paths are longer compared to the algorithm version with pronounced horizontal evasion tendency. A parameter study analyzes the effect of different weighting factors in the cost function. The best parameter combination shows a failure probability of 6.9% in city-like worlds and reduces energy consumption by 28%. Our findings demonstrate the potential of bio-inspired approaches for improving the performance of local path planning algorithms for UAV.
In this work, the effects of carbon sources and culture media on the production and structural properties of bacterial cellulose (BC) synthesized by Medusomyces gisevii have been studied. The culture medium was composed of different initial concentrations of glucose or sucrose dissolved in 0.4% extract of plain green tea. Parameters of the culture media (titratable acidity, substrate conversion degree etc.) were monitored daily for 20 days of cultivation. The BC pellicles produced on different carbon sources were characterized in terms of biomass yield, crystallinity and morphology by field emission scanning electron microscopy (FE-SEM), atomic force microscopy and X-ray diffraction. Our results showed that Medusomyces gisevii had higher BC yields in media with sugar concentrations close to 10 g L−1 after a 18–20 days incubation period. Glucose in general lead to a higher BC yield (173 g L−1) compared to sucrose (163.5 g L−1). The BC crystallinity degree and surface roughness were higher in the samples synthetized from sucrose. Obtained FE-SEM micrographs show that the BC pellicles synthesized in the sucrose media contained densely packed tangles of cellulose fibrils whereas the BC produced in the glucose media displayed rather linear geometry of the BC fibrils without noticeable aggregates.
Antibias training is increasingly demanded and practiced in academia and industry to increase employees’ sensitivity to discrimination, racism, and diversity. Under the heading of “Diversity Management,” antibias trainings are mainly offered as one-off workshops intending to raise awareness of unconscious biases, create a diversity-affirming corporate culture, promote awareness of the potential of
diversity, and ultimately enable the reflection of diversity in development processes. However, coming from childhood education, research and scientific articles on the sustainable effectiveness of antibias in adulthood, especially in academia, are very scarce. In order to fill this research gap, the article aims to explore how sustainable the effects of individual antibias trainings on participants’ behavior are. In order to investigate this, participant observation in a qualitative pre–post setting was conducted, analyzing antibias training in an academic context. Two observers actively participated in the training sessions and documented the activities and reflection processes of the participants. Overall, the results question the effectiveness of single antibias trainings and show that a target-group adaptive approach is mandatory owing to the background of the approach in early childhood education. Therefore, antibias work needs to be adapted to the target group’s needs and realities of life. Furthermore, the study reveals that single antibias trainings must be embedded in a holistic diversity management approach to stimulate sustainable reflection processes among the target group. This article is one of the first to scientifically evaluate antibias training effectiveness, especially in engineering sciences and the university context.
Throughout the last decade, and particularly in 2022, water scarcity has become a critical concern in Morocco and other Mediterranean countries. The lack of rainfall during spring was worsened by a succession of heat waves during the summer. To address this drought, innovative solutions, including the use of new technologies such as hydrogels, will be essential to transform agriculture. This paper presents the findings of a study that evaluated the impact of hydrogel application on onion (Allium cepa) cultivation in Meknes, Morocco. The treatments investigated in this study comprised two different types of hydrogel-based soil additives (Arbovit® polyacrylate and Huminsorb® polyacrylate), applied at two rates (30 and 20 kg/ha), and irrigated at two levels of water supply (100% and 50% of daily crop evapotranspiration; ETc). Two control treatments were included, without hydrogel application and with both water amounts. The experiment was conducted in an open field using a completely randomized design. The results indicated a significant impact of both hydrogel-type dose and water dose on onion plant growth, as evidenced by various vegetation parameters. Among the hydrogels tested, Huminsorb® Polyacrylate produced the most favorable outcomes, with treatment T9 (100%, HP, 30 kg/ha) yielding 70.55 t/ha; this represented an increase of 11 t/ha as compared to the 100% ETc treatment without hydrogel application. Moreover, the combination of hydrogel application with 50% ETc water stress showed promising results, with treatment T4 (HP, 30 kg, 50%) producing almost the same yield as the 100% ETc treatment without hydrogel while saving 208 mm of water.
In today's ultra-connected world, the significance of audio-visual documentation is rapidly growing. Technological advancements have made it more accessible to obtain powerful and compact audio-visual equipment, thereby reducing the dependency on a larger team for the documentation process. This has favoured the development of what is known as backpack journalism.
This project meets an unmet market need and presents an opportunity for innovative product development. It focuses on backpack journalists working in remote and challenging conditions with unpredictable transportation and working conditions. The proposed backpack design addresses both transport and working setups. Offering a robust and waterproof yet overall lightweight construction for easy equipment carrying, while also providing an extension of the workspace for essential gear.
Pendelleuchte aus Glas
(2023)
Glas ist seit jeher ein faszinierender Werkstoff. Es findet Anwendung in zahlreichen Gebieten und bietet als Material für Leuchten eine besondere Eleganz. Die Pendelleuchte „Calice di fiori“ vereint handwerkliche Kunstfertigkeit und komfortables Design. Sie ist aus mundgeblasenem Glas gefertigt und verleiht durch ihre Färbung eine kraftvolle und dynamische Atmosphäre im Raum. Das besondere Merkmal der Pendelleuchte ist eine Öffnung, die eine einfache und intuitive Montage erleichtert. Die Pendelleuchte ist mit energieeffizienten LEDs ausgestattet und lässt sich mit einem Smart-Home-System bedienen. Die Lichtintensität und Lichtfarbe können den individuellen Bedürfnissen angepasst werden. „Calice di fiori“ mit schnell abnehmbarem Leuchtenschirm fügt sich in modern eingerichtete Räume ein und bringt einen Hauch Blütenflair mit sich.
Der heutige Alltag vieler Menschen ist durch längere Sitz-Einheiten gekennzeichnet, während die körperliche Bewegung vernachlässigt wird. Diese Entwicklung kann einen negativen Einfluss auf die Haltung von Personen und ihre Gesundheit haben. In diesem Fall ist eine korrekte Haltung nicht nur für die körperliche, sondern auch für die psychische Gesundheit von großer Relevanz. Die Bachelorarbeit „LittleHabit“ ermöglicht es, dass bei Kindern die Bewegung nach langen Sitz-Einheiten durch gezieltes Training zur Gewohnheit wird. Hierbei wird zwischen dem Zuhause- und dem Schulbereich differenziert. Zu Hause soll das Kind beim Erledigen der Hausaufgaben durch Animationen und Lichtsignale dazu motiviert werden, Bewegungspausen einzulegen. In der Schule soll dieses Vorhaben in reduzierter Form aufgegriffen und mithilfe von Licht- und Farbsignalen umgesetzt werden. Darüber hinaus fördert es die intrinsische Motivation, sodass Kinder aus eigenem Antrieb ein Interesse dafür entwickeln, sich nach langen Sitz-Einheiten zu bewegen. LittleHabit setzt einen Baustein für die Entwicklung einer gesunden Sitz-Haltung und zielt darauf ab, Haltungsschwächen zu verhindern.
„ALIGN“ ist ein smartes Möbelsystem, das den individuellen Lebensstil und die Werte der heutigen Gesellschaft widerspiegelt. Es bietet ausreichend Stauraum und ermöglicht es, Objekte gezielt in Szene zu setzen oder in den Hintergrund zu rücken. Das vielseitige System passt sich an unterschiedliche Raum- und Nutzungsszenarien an. Es ermöglicht die individuelle Gestaltung des Wohnraums nach persönlichen Vorlieben und hilft, den Herausforderungen des modernen Lebens gerecht zu werden. „ALIGN“ – eine passende Lösung für jedes Problem.
In addition to the technical content, modern courses at university should also teach professional skills to enhance the competencies of students towards their future work. The competency driven approach including technical as well as professional skills makes it necessary to find a suitable way for the integration into the corresponding module in a scalable and flexible manner. Agile development, for example, is essential for the development of modern systems and applications and makes use of dedicated professional skills of the team members, like structured group dynamics and communication, to enable the fast and reliable development. This paper presents an easy to integrate and flexible approach to integrate Scrum, an agile development method, into the lab of an existing module. Due to the different role models of Scrum the students have an individual learning success, gain valuable insight into modern system development and strengthen their communication and organization skills. The approach is implemented and evaluated in the module Vehicle Systems, but it can be transferred easily to other technical courses as well. The evaluation of the implementation considers feedback of all stakeholders, students, supervisor and lecturers, and monitors the observations during project lifetime.
Durch das WEMoG (Gesetz v. 16.10.2020, BGBl. I 2187) hat der Gesetzgeber die Regelung des § 20 WEG eingeführt. Demnach ist auch für bauliche Veränderungen an Räumen und Flächen, die einem Sondernutzungsrecht unterliegen, die Zustimmung der Gemeinschaft notwendig. Der BGH hat nun mit Urt. v. 17.3.2023 –V ZR 140/22, MDR 2023, 619 deutlich gemacht, dass bei Fehlen eines entsprechenden Beschlusses, die bauliche Veränderung durch einen einzelnen Wohnungseigentümer nicht vorgenommen werden darf, sondern eine rechtswidrige Eigentumsbeeinträchtigung darstellt. Der folgende Beitrag nimmt die Entscheidung zum Anlass, um die neue Rechtslage durch § 20 WEG eingehend zu erläutern. Gleichzeitig werden die Folgen der aktuellen Entscheidung näher dargestellt.