University of the Aegean

About: University of the Aegean is a education organization based out in Mytilene, Greece. It is known for research contribution in the topics: Population & Tourism. The organization has 2818 authors who have published 8100 publications receiving 179275 citations. The organization is also known as: UAEG.

Integrating Web 2.0 in e-learning environments: a socio-technical approach

Abstract: The great diffusion of Web 2.0 is having a tremendous effect and change on the way people search, find, collaboratively develop and consume information and knowledge. Education and learning are not an exception of Web 2.0 trends, as the number of Web 2.0 empowered e-learning environments are booming. Although research in Web 2.0 applications in learning is rising, the studies tend to be very descriptive failing to identify and discuss the pedagogical theories and models that support and enhance the exploitation of Web 2.0 tools in (e)-learning environments. This paper aims to first discuss the use of Web 2.0 in (e)-learning and the new skills that they enable, and then, debate the pedagogical theories that support the exploitation of Web 2.0 for creating personalised and collaborative learning environments. To achieve that, a socio-technical approach is suggested.

Potential growth and biomass productivity of Miscanthus×giganteus as affected by plant density and N-fertilization in central Greece

Abstract: The potential growth and biomass productivity of Miscanthus×giganteus was investigated under constraint-free conditions during two years with appreciable different climatic conditions in central Greece, and under three different plant densities (0.66, 1, 2 pl m−2) and two different nitrogen dressings ( N 0 = 50 , N1=100 kg N ha−1). The field experimental design was a 3×2 factorial split plot in four blocks. Plant height, tiller number, leaf area index and dry weight per plant component were measured in subsequent harvests throughout the growing periods of 2001 and 2002. It was found that fertilisation within the studied rates did not affect growth and biomass productivity of the crop, and no interaction between fertilization and plant density was observed in any of the samplings. Contrary to fertilization, a significant effect of plant density was found, with the denser populated plants (10,000–20,000 pl ha−1) performing growth rates of 250–350 kg ha−1 d−1 for large parts of the growing period, reaching maximum dry biomass yields in excess of 38 t ha−1 in the more favorable year, 2002, and 28 t ha−1 in the warmer and drier year 2001. Such high yield potentials were explained by the particularly great assimilation rates of this crop that were also measured under light saturation and optimum temperature and water regimes. With such biomass yields (11.2–15.2 t ha−1 oil equivalent), obtainable particularly under modest fertilisation needs, Miscanthus sinensis should be considered as a very promising crop for biomass production in Greece in the near future.