Search results for "succe"
showing 10 items of 990 documents
ICT AND INNOVATIVE TEACHING FOR EDUCATIONAL SUCCESS IN THE FIRST CYCLE OF SECONDARY SCHOOL
2013
In order to trigger an effective process for the improvement of teaching, we need to have reliable and comparable results, collected by a system of objective assessment of learning. We present the results of a research project – based on the measurement of learning standards, carried out through an external evaluation integrated with the internal evaluation prepared by the teachers. The project was aimed both at improving the performance of individual pupils and, secondly,at enhancing teachers’ professional skills. The project goals consisted in supporting teachers of secondary schoo ls (first level) in the development of those skills considered essential to improve the quality of education…
Healthy lifestyles and academic success in a sample of Italian university students
2019
Scientific literature has shown that healthy lifestyles are implicated both in the risk reduction of several disorders and in the improvement of cognitive functions. The present study evaluated the association between lifestyle behaviors and academic performance in university students from twelve different degree courses at the University of Palermo, Italy. It was hypothesized that healthy lifestyles, measured as the practice of a good diet, satisfying quality of sleep, low-stress levels, perceived social support, abstention from the use of illegal drugs, non-problematic Internet use, and regular sports habits, were associated to academic success. A total of 466 students were surveyed (26.5…
Hydraulic kinetics of the graft union in different Olea europaea L. scion/rootstock combinations
2007
The hydraulic resistance of young olive trees grafted on rootstocks with contrasting size-controlling potential was measured 30, 90, 360 and 480 days after grafting. Olive (Olea europaea L.) clones inducing plant vigorous growth (Leccino ‘Minerva’, LM) or dwarfing (Leccino ‘Dwarf’, LD) were studied in different scion/rootstock combinations (LD/LD, LD/LM, LM/LD, LM/LM). Plants growing on LD root systems developed lower leaf surface areas (about 50% less) than plants grafted on LM rootstocks. Graft union represented the largest fraction (up to 85%) of whole-plant hydraulic resistance 30 days after grafting, and still represented an important fraction of it 2 months later (40–55%). Four-hundre…
Analisi dei processi di rinaturalizzazione nei vigneti e cappereti abbandonati del paesaggio terrazzato di Pantelleria (Canale di Sicilia)
2004
This study analyses the vegetation dynamics in the terrace landscape of Pantelleria Island (Sicilian Channel). The main questions were to determine the sequence of plant communities in time and to find out which environmental factors influence the course and the speed of succession. In the thermomediterranean part of the island were made vegetation relevés in five different fallow age classes, investigating three different ecological subunits: the terrace surface, the wall base and the wall in North-facing as well as in South-facing vine and caper fallows. The results show that undisturbed abandoned terraces are subject to rapid renaturation: 50 to 80 years old fallows are covered by dense …
Soil carbon dynamics during secondary succession in a semi-arid Mediterranean environment
2018
Clarifying which factors cause an increase or decrease in soil organic carbon (SOC) after agricultural abandonment requires integration of data on the temporal dynamics of the plant community and SOC. A chronosequence of abandoned vineyards was studied on a volcanic island (Pantelleria, Italy). Vegetation in the abandoned fields was initially dominated by annual and perennial herbs, then by Hyparrhenia hirta (L.) Stapf, and finally by woody communities. As a consequence, the dominant photosynthetic pathway changed from C3 to C4 and then back to C3. Conversion of a plant community dominated by one photosynthetic pathway to another changes the 13C/12C ratio of inputs to soil organic carbon (S…
Carbon dynamics of soil organic matter in bulk soil and aggregate fraction during secondary succession in a Mediterranean environment.
2013
Clarifying which factors cause an increase or decrease in soil organic carbon (SOC) after agricultural abandonment requires integration of data on the temporal dynamics of the plant community and SOC. A chronosequence of abandoned vineyards was studied on a volcanic island (Pantelleria, Italy). Vegetation in the abandoned fields was initially dominated by annual and perennial herbs, then by Hyparrhenia hirta (L.) Stapf, and finally by woody communities. As a consequence, the dominant photosynthetic pathway changed from C3 to C4 and then back to C3. Conversion of a plant community dominated by one photosynthetic pathway to another changes the 13C/12C ratio of inputs to SOC. Using the time si…
Litter contribution to soil organic carbon in the processes of agriculture abandon
2015
The mechanisms of litter decomposition, translocation and stabilization into soil layers are fundamental processes in the functioning of the ecosystem, as they regulate the cycle of soil organic matter (SOM) and CO2 emission into the atmosphere. In this study the contribution of litters of different stages of Mediterranean secondary succession on carbon sequestration was investigated, analyzing the role of earthworms in the translocation of SOM into the soil profile. For this purpose the δ13C difference between meadow C4-C soil and C3-C litter was used in a field experiment. Four undisturbed litters of different stages of succession (45, 70, 100 and 120 since agriculture abandon) were colle…
The effects of land abandonment and long-term afforestation practices on the organic carbon stock and lignin content of Mediterranean humid mountain …
2019
Afforestation is an important strategy that can decrease atmospheric carbon by sequestering carbon in biomass and soil. In Spain, an active afforestation programme was adopted in the 1950s when the soil was severely eroded after widespread abandonment of arable land. The Araguás catchment (Central Spanish Pyrenees) is a good example of this programme because it was afforested with both Pinus sylvestris L. (PS) and Pinus nigra J.F.Arnold (PN). The soil organic carbon (SOC) stock and lignin content (based on the vanillyl, syringyl and cinnamyl contents) of these afforested soils were examined and compared to those of bare soil, secondary succession and meadow soils. Both the SOC stock and lig…
Middle Eocene calcareous nannofossils in the Jaca transect (South-central Pyrenees Eocene Basin, Aragón river valley, Huesca)
2020
The calcareous nanoplankton is studied from the base of the turbidite systems of the Upper Hecho Group (Jaca Basin, middle Eocene of the South-central Pyrenean Basin) up to the Gracionepel instabilities, within the Larres slope Marls. This new chronostratigraphic contribution is of crucial importance for the improvement of the detailed temporal and spatial correlation framework of the genetically related depositional systems at basin scale. The calcareous nanofossil assemblage is largely dominated by Coccolithus pelagicus , C. formous as well as different species of Reticulofenestra , accompanied by occasional specimens of several species of Sphenolithus and Chiasmolithus . The results obt…
Assessment of student engagement among junior high school students and associations with self-esteem, burnout, and academic achievement
2016
Journal for educational research online 8 (2016) 2, S. 136-157