Development and Implementation of Multi-Purpose Peer Learning Mobile App for Students' Participation in Large-Size classes

2014 ◽  
Vol 20 (4) ◽  
pp. 547-570
Author(s):  
Kim Minjeong
Keyword(s):  
Peer Learning ◽  
Mobile App ◽  
Size Classes ◽  
Large Size

scholarly journals Peer Learning as a Key Component of an Integrated Teaching Method: Overcoming the Complexities of Physics Teaching in Large Size Classes

2021 ◽  
Vol 11 (2) ◽  
pp. 67
Author(s):  
Matteo Bozzi ◽  
Juliana E. Raffaghelli ◽  
Maurizio Zani
Keyword(s):  
Engineering Students ◽  
Teaching Method ◽  
Peer Learning ◽  
Control Group ◽  
Teaching Methodology ◽  
Learning Technology ◽  
University Policy ◽  
Size Classes ◽  
Large Size ◽  
Traditional Lectures

Over the last decade, policy makers have urged universities to innovate their teaching methodologies. Although educational research has shown that active methods lead to improvements in learners’ performance more than traditional lectures in small classes, some factors impede active methods from spreading in large size classes. In this paper we aim at fostering these methodological innovations by showing the effectiveness of an integrated teaching methodology that employs peer learning, technology, and traditional lectures in large size classes. In the academic years 2017–2018 and 2018–2019 a quasi-experiment involved more than 600 engineering students per year attending an introductory physics course at Politecnico di Milano. These learners were assigned to two sections and their outcomes in a pre-test and a post-test were analyzed through descriptive and inferential statistics. The learning results of the experimental group were always better than the outcomes of the control group, regardless of the difficulty of the physics topics addressed. Furthermore, a very low threshold for the exposure to peer learning has been highlighted in order for it to be effective. These promising results may thus foster ongoing changes in university policy towards the renewal of the teaching methodology.

Diet, feeding behaviour and habitat utilisation of the blue stingray Dasyatis chrysonota (Smith, 1828) in South African waters

2003 ◽  
Vol 54 (8) ◽  
pp. 957 ◽  
Author(s):  
David A. Ebert ◽  
Paul D. Cowley
Keyword(s):  
Surf Zone ◽  
Stomach Contents ◽  
Size Class ◽  
Behaviour Pattern ◽  
Medium Size ◽  
Secondary Importance ◽  
Size Classes ◽  
Important Prey ◽  
Large Size ◽  
Large Size Class

Analysis of stomach contents for Dasyatis chrysonota revealed that diet varied with size and habitat. The diet of all size classes in the surf zone was comprised primarily of Callianassa spp., Donax spp. and unidentified polychaete species. The medium and large size classes fed primarily on Donax spp., whereas the very large size class fed mainly on Callianassa spp. Polychaetes were of secondary importance as prey for the medium size class. The diet of D. chrysonota in the nearshore zone consisted mainly of Balanoglossus capensis and Callianassa spp. Balanoglossus capensis decreased from an index of relative importance (IRI) of 75.3% for the medium size class to 59.9% for the very large size class, whereas Callianassa spp. increased from 22.8% to 39.4% between the medium and the very large size classes. The offshore zone was the only area in which small size class D. chrysonota were caught. The diet of these small D. chrysonota was primarily polychaetes and amphipods. Polychaetes increased in importance in the medium size class, but declined in each successively larger size class. Conversely, Pterygosquilla armata capensis became the single most important prey item for the very large size class, comprising an IRI of 50.9%. The behaviour pattern used by D. chrysonota to locate and extract prey is described.

scholarly journals The Effect of the Decorator Crab Notomithrax Minor on Cultivated Greenshell Mussel Spat (Perna Canaliculus) Survival, Growth, and Byssal Characteristics

2021 ◽  
Author(s):  
◽  
Irene Van de Ven
Keyword(s):  
Retention Rate ◽  
Experimental Testing ◽  
Preliminary Evidence ◽  
Size Classes ◽  
Perna Canaliculus ◽  
Large Size ◽  
Field Investigations ◽  
Attachment Strength ◽  
Decorator Crab ◽  
Financial Losses

<p>The decorator crab Notomithrax minor is common on Greenshell mussel (Perna canaliculus) farms in the Marlborough Sounds, New Zealand. Individuals in the Greenshell mussel industry have suggested that the presence of N. minor, found on mussel lines, is related to substantial losses of Greenshell mussel spat. Laboratory and field investigations were used to assess the effect of N. minor presence on the retention and productivity of Greenshell musselTM spat. Specific consideration was given to predation pressure and induced anti-predator defenses, both of which can cause financial losses to mussel farmers. High (12 crabs/cage-1) and low (3 crabs/cage-1) densities of large (males: >20mm, females: >15mm TCW) and medium (males: 15-20mm, females: 10-15mm TCW) decorator crabs were placed in cages on commercial Greenshell mussel farm droppers at two sites in the Pelorus Sound. The byssal characteristics, spat retention rate and spat shell length were assessed at 8 and 11 weeks after trial initiation. Greenshell mussel density on the experimental droppers decreased significantly when medium and high densities of the decorator crabs (N. minor) were introduced. N. minor presence induced the remaining Greenshell mussel spat to produce more and thicker byssus threads which consequently lead to increased mussel attachment. The decrease in retention rate and the increase in mussel attachment strength were more pronounced in small recently seeded spat. Laboratory experiments to assess the consumption rate of small (≤5mm) Greenshell mussel spat by decorator crabs showed that mussel consumption by N. minor peaked at 56.43 (± 13.02 (95% C.I.)) crab-1 hr-1, however the rate of consumption decreased significantly over the duration of the three day trial. N. minor prey size preference was also assessed using Laboratory trials; crabs were offered 4 size classes of mussels (small (<5 mm), small-medium (5-10 mm), medium-large (10-15 mm), large (>15 mm) simultaneously. Female crabs consumed more mussels in the <5 mm and 5-10 mm size classes than in the two larger mussel size classes (10-15 mm and >15 mm), whereas the male crabs showed a numerical preference for mussel spat in the small-medium and medium-large size classes. This study provides preliminary evidence that the decorator crab N. minor is a previously overlooked and under-estimated threat to the Greenshell Mussel industry in the Marlborough Sounds that deserves closer scrutiny and experimental testing.</p>

scholarly journals Design and Implementation of P2P Based Mobile App for Collaborative Learning in Higher Education

2020 ◽  
Vol 14 (07) ◽  
pp. 115 ◽  
Author(s):  
Asmae Blilat ◽  
Abdelali Ibriz
Keyword(s):  
Collaborative Learning ◽  
Mobile Application ◽  
Unified Modeling Language ◽  
Peer Learning ◽  
Mobile App ◽  
Learning System ◽  
Mobile Technologies ◽  
Modeling Language ◽  
Learning Resources ◽  
First Choice

Within the recent years, mobile technologies have made major progress in its de-velopment. They have become an integral part of our daily life. Therefore, the big interest of using mobile technology in education process is comprehensible. A new technology was born called mobile learning (m-learning). The main benefits of this technology is sharing three important dimensions of learning resources namely learning contents, learning collaborators and learning services. In univer-sity courses, different forms of collaborative and peer learning are progressively used in order to assist students meet an assortment of learning outcomes. There-fore, the use of mobile technologies in education has become a crucial topic for research. Because mobile phone is the first choice of everyone to communicate, our research is focused on the use of smartphones as learning resources. In this paper, we propose an implementation of a new mobile application based peer-to-peer learning system named "EachOther" and a scenario for its usage applied on students of an IT course at the High School of Technology of Fez (ESTF). The aim of this work consists of the conception, the development and the implementa-tion of the mobile application based on Android system to support collaborative learning, by applying an object-oriented modeling language which is Unified Modeling Language (UML).

scholarly journals An external tag for fish: tagging effects in different fish size classes and its influence on growth performance and hematology of Lophiosilurus alexandri (Siluriformes: Pseudopimelodidae)

2019 ◽  
Vol 17 (1) ◽  
Author(s):  
Túlio P. Boaventura ◽  
Viviane S. B. Gil ◽  
Camila S. B. Gil ◽  
Anderson M. Peres ◽  
Ronald K. Luz
Keyword(s):  
Growth Performance ◽  
Retention Rate ◽  
Hematological Parameters ◽  
Size Classes ◽  
Tag Retention ◽  
Large Size ◽  
Large Size Class ◽  
Survival And Growth ◽  
Hematology Parameters ◽  
Animal Size

ABSTRACT This study tested an external tag for juveniles of Lophiosilurus alexandri and measured the effects of tagging in different size classes of fishes. Experiment 1 evaluated the retention rate and influence of the tag on survival and growth of three hundred fishes divided Small, Medium and Large size classes. After 90 days of experiment the fishes had 100% survival and the tag had a higher retention rate for animals of the Large size class. Experiment 2 evaluated the tag’s influence on hematology parameters of forty-two fishes at 5, 10 and 30 days post-tagging. In this experiment both tagged and untagged animals experienced 9.4% mortality. The hematocrit was higher on the 30th day for tagged animals than for untagged animals. No difference was observed for leukocytes, plasma protein, erythrocytes and mean corpuscular volume. It was concluded from Experiment 1 that the tag reduced growth performance when applied to small sized juvenile L. alexandri, and that the tag retention rate increased with increasing animal size. Among the hematological parameters studied for juveniles on the Experiment 2 the tag only influenced the hematocrit parameters, which shows that the tag can be used without considerable influence on the hematological parameters of juvenile L. alexandri.

Size dominance regulates tree spacing more than competition within height classes in tropical Cameroon

2010 ◽  
Vol 27 (1) ◽  
pp. 93-102 ◽  
Author(s):  
Stephan Getzin ◽  
Martin Worbes ◽  
Thorsten Wiegand ◽  
Kerstin Wiegand
Keyword(s):  
Plant Growth ◽  
Secondary Forest ◽  
Random Pattern ◽  
Minor Importance ◽  
Competitive Effects ◽  
Size Classes ◽  
Large Size ◽  
Weak Evidence ◽  
Large Size Class ◽  
And Performance

Abstract:Does competition prevail in large size classes of trees in tropical forests? This question is fundamental to our understanding of the demography and dynamics occurring in rain forests. We investigated this question based on an undisturbed late-secondary forest on a 1-ha plot in central Cameroon. Trees were stem-mapped and classified into three size classes: understorey, midstorey and overstorey. The diameter at breast height and yearly biomass increment were determined as measures of plant growth and performance. Spatial statistics such as pair- and mark-correlation functions were used to detect scale-dependent patterns that could be caused by competition within and between the three size classes. The results revealed a random pattern and spatially uncorrelated measures of plant growth of overstorey trees. This suggests that competitive effects are of minor importance in the large size class of overstorey trees. Likewise, only weak evidence for competition between trees was found within the two lower size classes. However, negative distance correlations were found between the different size classes. We suggest that competition within height classes was relatively low due to the diversity of species with their variable niche differentiations and phenotypic plasticity that may compensate for competitive effects.

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