3,438 research outputs found
iMobilePhysics: Seamless Learning durch Experimente mit Smartphones & Tablets in Physik
Get PDFDer Beitrag erläutert ein Nutzungskonzept für Smartphones und Tablets als physikalische Experimentiermittel (iMobilePhysics, kurz: iMP) und ordnet zwei Realisierungsbeispiele dieses Konzept für Schule und Hochschule an Hand von Designkriterien in den Rahmen des Mobile Assisted Seamless Learning (MSL) ein. Zu den Beispielen werden Studien zur Lernwirksamkeit und Akzeptanz der medienbasierten Lehransätze dargestellt. Die Ergebnisse liefern den Begründungsrahmen, mobiles Experimentieren mit Smartphone und Tablets zur Unterstützung von MSL in die schulische und universitäre Lehre, insbesondere in die Lehramtsausbildung einzubinden.
12.08.2016 | Michael Hirth, Jochen Kuhn, Andreas Müller, Matthias Rohs & Pascal Klein (Kaiserslautern, Genf
Gene loss and lineage specific restriction-modification systems associated with niche differentiation in the Campylobacter jejuni Sequence Type 403 clonal complex
Get PDFCampylobacter jejuni is a highly diverse species of bacteria commonly associated with infectious intestinal disease of humans and zoonotic carriage in poultry, cattle, pigs, and other animals. The species contains a large number of distinct clonal complexes that vary from host generalist lineages commonly found in poultry, livestock, and human disease cases to host-adapted specialized lineages primarily associated with livestock or poultry. Here, we present novel data on the ST403 clonal complex of C. jejuni, a lineage that has not been reported in avian hosts. Our data show that the lineage exhibits a distinctive pattern of intralineage recombination that is accompanied by the presence of lineage-specific restriction-modification systems. Furthermore, we show that the ST403 complex has undergone gene decay at a number of loci. Our data provide a putative link between the lack of association with avian hosts of C. jejuni ST403 and both gene gain and gene loss through nonsense mutations in coding sequences of genes, resulting in pseudogene formation
Visual cues improve students’ understanding of divergence and curl : Evidence from eye movements during reading and problem solving
No full textThe coordination of multiple external representations is important for learning, but yet a difficult task for students, requiring instructional support. The subject in this study covers a typical relation in physics between abstract mathematical equations (definitions of divergence and curl) and a visual representation (vector field plot). To support the connection across both representations, two instructions with written explanations, equations, and visual representations (differing only in the presence of visual cues) were designed and their impact on students’ performance was tested. We captured students’ eye movements while they processed the written instruction and solved subsequent coordination tasks. The results show that students instructed with visual cues (VC students) performed better, responded with higher confidence, experienced less mental effort, and rated the instructional quality better than students instructed without cues. Advanced eye-tracking data analysis methods reveal that cognitive integration processes appear in both groups at the same point in time but they are significantly more pronounced for VC students, reflecting a greater attempt to construct a coherent mental representation during the learning process. Furthermore, visual cues increase the fixation count and total fixation duration on relevant information. During problem solving, the saccadic eye movement pattern of VC students is similar to experts in this domain. The outcomes imply that visual cues can be beneficial in coordination tasks, even for students with high domain knowledge. The study strongly confirms an important multimedia design principle in instruction, that is, that highlighting conceptually relevant information shifts attention to relevant information and thus promotes learning and problem solving. Even more, visual cues can positively influence students’ perception of course materials.peerReviewe
Förderung von Repräsentationskompetenz und Experimentbezug in den vorlesungsbegleitenden Übungen zur Experimentalphysik
No full textBest of Germany: VorleXung: Cross-linking Recitation Sessions and Physics Lectures using eXperiment-based Video-Analysis Tasks
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iMobile Physics: A Research and Development Project for Teaching and Learning with Smartphones and Tablet PCs as Mobile Experimental Tools
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