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- Birkenkrahe, Marcus, et al.
(author)
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Improving Student Interaction and Engagement in the Flipped Classroom
- 2015
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In: Proceedings of the 14th European Conference on e-Learning. - : Academic Conferences and Publishing International Limited. - 9781910810705 - 9781910810712
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Conference paper (peer-reviewed)abstract
- We present concepts, results and preliminary results from two different graduate courses that were run in flipped classroom format at the University of Stockholm and at the Berlin School of Economics and Law. Both courses involved extensive audio and film material and relied on students teaching each other, similar to the Learning by Teaching method developed by Jean-Pol Martin. The purpose of the two experiments was to investigate whether a design science approach to developing flipped-classroom courses can be recommended and especially whether the design can secure student interaction and engagement. We designed two different courses in order to evaluate most of the relevant aspects of the flipped classroom design. We then collected data via student evaluations, student activities in online systems and student reports. Our findings lead us to conclude that if the goal is to assist students in teaching each other, it is best to base number, extent and timing of these elements on an assessment of student expectations rather than setting them as a standard for all groups of students and courses. The course design should instead be adapted to the students. These conclusions are consistent with experiences that we made in another similar course in which we opted for a standard approach with fixed timing, extent and number of learning elements. Our major finding is that a design science approach can be recommended for developing flipped classroom courses, but needs to be customised for individual groups using ongoing feedback about course structure, content and delivery methods. This was indicated by successful evaluation results on most of the designed strategies for promoting student interaction and engagement. We cannot argue that our specific designs were better than any other successful design, but we can argue that a design approach creates results that can be evaluated.
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| 2. |
- Morrell, Jane
(author)
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Differences in preservation of canine chilled semen using simple sperm washing, single-layer centrifugation and modified swim-up preparation techniques
- 2016
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In: Reproduction, Fertility and Development. - 1031-3613 .- 1448-5990. ; 28, s. 1545-1552
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Journal article (peer-reviewed)abstract
- This study compared the efficacy of simple sperm washing (SW), single-layer centrifugation (SLC) and modified swim-up (SU) techniques in the preparation of dog spermatozoa for cooling. Eighteen ejaculates, collected from three dogs (six per dog), were pooled (three ejaculates per pool) and divided into three aliquots: (1) one aliquot was washed and cooled at 5 degrees C for 72h, considered as control (SW-control), (2) the second aliquot was selected by SLC through Androcoll-C and subsequently cooled in the same way as the SW-control samples (SLC-AC) and (3) the last aliquot was selected by a modified SU method with Androcoll-C and cooled as mentioned above (SU-AC). Assessment of sperm motility, sperm morphology, sperm membrane integrity and acrosome integrity were performed on aliquots of fresh semen and chilled-rewarmed samples. Sperm membrane integrity and progressive motility were significantly (P<0.05) improved by SU-AC compared with SW-control. Morphological sperm abnormalities decreased significantly (P<0.001) in SLC-AC samples compared with SW-control samples. These sperm variables did not differ between SLC-AC and SU-AC methods (P>0.05). The recovery rates were not significantly (P>0.05) different between SW-control, SLC-AC and SU-AC samples. Our results confirm that SU-AC may be a successful method for the preparation of dog spermatozoa for cooling.
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| 3. |
- Rosenstock Völtz, Luísa, 1988-, et al.
(author)
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The Effect of Recycling on Wood-Fiber Thermoplastic Composites
- 2020
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In: Polymers. - : MDPI. - 2073-4360. ; 12:8
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Journal article (peer-reviewed)abstract
- The aim of this study was to investigate the effect of recycling on polypropylene (PP) and wood-fiber thermoplastic composites (WPCs) using a co-rotating twin-screw extruder. After nine extrusion passes microscopy studies confirmed that the fiber length decreased with the increased number of recycling passes but the increased processing time also resulted in excellent dispersion and interfacial adhesion of the wood fibers in the PP matrix. Thermal, rheological, and mechanical properties were studied. The repeated extrusion passes had minimal effect on thermal behavior and the viscosity decreased with an increased number of passes, indicating slight degradation. The recycling processes had an effect on the tensile strength of WPCs while the effect was minor on the PP. However, even after the nine recycling passes the strength of WPC was considerably better (37 MPa) compared to PP (28 MPa). The good degree of property retention after recycling makes this recycling strategy a viable alternative to discarding the materials. Thus, it has been demonstrated that, by following the most commonly used extrusion process, WPCs can be recycled several times and this methodology can be industrially adapted for the manufacturing of recycled products.
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