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How beneficial are seasonal climate forecasts for climate risk management? An appraisal for crop production in Tanzania
No full textOpen-Access-Publikationsfonds 202
Impact of mild leg length discrepancy on pelvic alignment and gait compensation in children
No full textPrivacy Perceptions Across the XR Spectrum: An Extended Reality Cross-Platform Comparative Analysis of A Virtual House Tour
No full textExtended Reality (XR) devices are becoming available in all shapes and forms. They are foreseen to be the backbone of the Metaverse, which is expected to increasingly lead toward more interconnected XR experiences in the future. However, these devices include a large number of sensors that collect sensitive data about users and their surroundings, thus posing threats to their privacy. Until now, research on how users perceive these threats has rather focused on either Mobile Augmented Reality (MAR), Mixed Reality (MR), or Virtual Reality (VR). Still, adopting a global vision including all these technologies, i.e., XR, is necessary to understand the potential differences in privacy between users that future cross-platform experiences may cause. This understanding is needed to bring usable Privacy-Enhancing Technologies (PETs) to XR users. In this paper, we therefore consider different XR technologies together, and analyze users’ related privacy perceptions. By doing so, we observe differences and similarities between each of these technologies by comparing them against each other. In our study, 20 participants have visited a virtual house guided by a real-estate agent, with a cross-platform application that we developed for (1) Android (MAR), (2) Microsoft Hololens (MR), and (3) Meta Quest 2 (VR). They tested our application with two of these devices. We then conducted a semi-structured interview to gather comparisons and insights on their experience with both technologies, including permission requests, sensor data collection, and privacy perceptions. Our findings suggest that our participants are more concerned about MAR and MR than VR. We found they were less aware about the use of camera and eye tracking data than microphone data in the context of our application. In addition, half of our participants were more concerned about XR than more common technologies (i.e.,computers, smartphones), despite overall low concerns on XR and low awareness on biometric data sensitivity. These insights underline aspects that must further be developed to raise XR users’ awareness and help them in better controlling their privacy, such as more adapted sets of permissions to track surfaces in XR
Propaganda für ein Kalifat und das deutsche Strafrecht
No full textDie Forderung nach der Errichtung eines Kalifats wird in Deutschland selten erhoben. Wer sie erhebt, kann sich öffentlicher Aufmerksamkeit gewiss sein. Das zeigen von einer kleinen islamistischen Gruppe veranstaltete Demonstrationen in Hamburg im April und Oktober 2024, die breite Berichterstattung der Medien und gelegentlich erhobene Verbotsforderungen.The demand for the establishment of a caliphate is rarely raised in Germany. Those who call for it can be sure of public attention. This is shown by demonstrations organised by a small Islamist group in Hamburg in April and October 2024 as well as the broad media coverage and occasional calls for a ban
Magnetisation transfer, T1 and T2* relaxation in canine menisci of elderly dogs—an ex vivo study in stifle joints
No full textOpen-Access-Publikationsfonds 202
Eine systematische Literaturrecherche
No full textDie vorliegende Masterarbeit untersucht die Auswirkungen von Bewegungspausen auf die Konzentrationsfähigkeit von Grundschüler*innen. Angesichts des zunehmenden Bewegungsmangels bei Kindern infolge technologischer Entwicklungen und veränderter Lebensgewohnheiten gewinnt die Integration von Bewegung in den Schulalltag an Bedeutung. Bewegung ist für die kindliche Entwicklung essenziell und fördert neben der physischen Gesundheit auch die kognitive Leistungsfähigkeit. Trotz dieser Erkenntnisse verbringen Kinder einen Großteil ihrer Zeit sitzend, was negative gesundheitliche Folgen haben kann.
Im Rahmen einer systematischen Literaturanalyse wurden Studien aus den Jahren 2019 bis 2023 untersucht, um den Einfluss regelmäßiger Bewegungspausen auf die Konzentrationsfähigkeit von Grundschulkindern zu ermitteln. Insgesamt wurden sechs Studien mit einer Stichprobe von 909 Kindern aus verschiedenen Ländern analysiert. Die Ergebnisse zeigen konsistente positive Effekte von Bewegungspausen auf die Konzentrationsfähigkeit. Bereits kurze Bewegungseinheiten von zwei bis 15 Minuten führten zu signifikanten Verbesserungen. Besonders wirksam waren Kombinationen aus körperlicher und kognitiver Aktivität sowie die aktive Einbindung der Schüler*innen in die Gestaltung der Pausen.
Obwohl Herausforderungen wie Zeit- und Platzmangel bei der Umsetzung existieren, zeigen die Studien, dass diese überwindbar sind. Die Integration von Bewegungspausen in den Schulalltag wird empfohlen, um die Konzentrationsfähigkeit und das Wohlbefinden der Kinder zu fördern. Flexibilität bei der Gestaltung der Pausen ist dabei entscheidend, um individuellen Bedürfnissen gerecht zu werden und eine zu starre Standardisierung zu vermeiden.
Die Arbeit schließt mit der Empfehlung, Bewegungspausen als festen Bestandteil des Unterrichts zu etablieren, und betont die Notwendigkeit weiterer Forschung zu langfristigen Effekten und optimalen Gestaltungsformen.This Master's thesis examines the impact of movement breaks on the concentration ability of primary school students. In light of increasing physical inactivity among children due to technological developments and changing lifestyles, integrating movement into the school day is becoming increasingly important. Movement is essential for child development and promotes not only physical health but also cognitive performance. Despite these findings, children spend a significant portion of their time sitting, which can have negative health consequences. A systematic literature analysis was conducted, examining studies from 2019 to 2023 to determine the influence of regular movement breaks on the concentration ability of primary school children. In total, six studies with a sample of 909 children from various countries were analyzed. The results show consistent positive effects of movement breaks on concentration ability. Even short movement units of two to 15 minutes led to significant improvements. Combinations of physical and cognitive activity and the active involvement of students in designing the breaks were particularly effective.
Although challenges such as time and space constraints exist in implementation, the studies indicate that these can be overcome. Integrating movement breaks into the school day is recommended to promote children's concentration and well-being. Flexibility in designing the breaks is crucial to meet individual needs and avoid overly rigid standardization.
The thesis concludes with the recommendation to establish movement breaks as a fixed component of instruction and emphasizes the need for further research on long-term effects and optimal design practices
Microbial strategies regulate organic carbon accumulation in saline paddy soils: A millennium chronosequence
No full texthttp://dx.doi.org/10.13039/501100007928 Ningbo Municipal Bureau of Science and Technologyhttp://dx.doi.org/10.13039/501100018647 RUDN Universityhttp://dx.doi.org/10.13039/501100001809 National Natural Science Foundation of Chin
