Search results for "GRADE"
showing 10 items of 695 documents
Poisson-Nijenhuis structures and the Vinogradov bracket
1994
We express the compatibility conditions that a Poisson bivector and a Nijenhuis tensor must fulfil in order to be a Poisson-Nijenhuis structure by means of a graded Lie bracket. This bracket is a generalization of Schouten and Frolicher-Nijenhuis graded Lie brackets defined on multivector fields and on vector valued differential forms respectively.
Predicting Mathematics Achievement in Secondary Education: The Role of Cognitive, Motivational, and Emotional Variables.
2020
Academic achievement in general, and in mathematics in particular, is positively associated not only with cognitive abilities, but also with emotional and motivational skills. The objective of this study was to analyze the prediction strength of cognitive, motivational, and emotional variables in mathematics achievement throughout high school, considering students' gender and age. A large sample of 2,365 Spanish students from the 4 years of high school (12-16 years old) participated in the study. Students provided information about their intellectual skills, perceived competence in mathematics, perceived utility of mathematics, intrinsic interest in learning, mathematics anxiety, and their …
Effects of Grade Retention Policies: A Literature Review of Empirical Studies Applying Causal Inference
2021
The identification of the causal effects of grade retention policies is of enormous relevance for researchers and policymakers alike. Taking advantage of the availability of more detailed longitudinal datasets, researchers have been able to apply different identification strategies that address the classical problems of selection bias and unobserved heterogeneity that have plagued previous studies on the effect of retention. We present a systematic literature review of empirical studies aiming to unveil the causal effects of retention. This study underlines the need to consider and evaluate different kinds of grade retention polices as their effects vary depending on several dimensions (suc…
Perceived teacher support and language anxiety in Polish secondary school EFL learners
2011
The teacher’s role is vital, both in respect to achieving academic goals, and with regard to the regulation of emotional and social processes. Positive perceptions of teacher support can endorse psychological wellness, and help maintain students’ academic interests, higher academic achievement and more positive peer relationships. The teacher who shows understanding, empathy and consistency in their behavior helps students start forming an identity, which will assist them in coping with stress and anxiety directly connected with the foreign language learning process (language anxiety). The main aim of this research is to investigate the relationship between teacher support and language anxi…
Preadolescent EFL learners’ self-efficacy expectancies before and after completion of a grammar task: Multivariate analyses of grade level, gender, a…
2020
Learners’ task-specific self-efficacy expectancies have gained increased attention in the EFL context. Across various competence areas they have been demonstrated to substantially affect learners’ motivation, learning approach, and performance. However, certain research gaps still exist – particularly concerning younger learners’ grammar self-efficacy. Furthermore, though conceptually assumed to play an essential role in learners’ self-efficacy formation and calibration accuracy, little is empirically known about task completion effects. The same applies to the role of grade level and gender differences in lower secondary EFL classrooms. Against this background, the present study addressed …
New Results from the NUMEN Project
2018
International audience; NUMEN aims at accessing experimentally driven information on Nuclear Matrix Elements (NME) involved in the half-life of the neutrinoless double beta decay (0νββ), by high-accuracy measurements of the cross sections of Heavy Ion (HI) induced Double Charge Exchange (DCE) reactions. First evidence about the possibility to get quantitative information about NME from experiments is found for the (^18O,^18Ne) and (^20Ne,^20O) reactions. Moreover, to infer the neutrino average masses from the possible measurement of the half-life of 0νββ decay, the knowledge of the NME is a crucial aspect. The key tools for this project are the high resolution Superconducting Cyclotron beam…
Hydroseeding for revegetation in a semiarid Mediterranean environment
2012
Hydroseeding is a technique increasingly used to establish vegetation on degraded areas in order to perform environmental protection. The objective of this paper was to evaluate the effectiveness of four different hydroseeding methods on a degraded artificial slope in the southern Mediterranean area determining total vegetation cover, hydroseeding vegetation cover, hydroseeding success index (HSI), natural and hydroseeded vegetation height. The test area does not allow the use of any operating machine for soil and vegetation management, the only applicable technique is therefore hydroseeding. After hydroseeding was applied (December 2010), 21 checks were carried out every 15 days (from Janu…
Tecniche di upgrade del biogas a biometano.
2018
Il biogas prodotto dalla digestione anaerobica (AD) a partire da matrici organiche, sia in reattori controllati (digestori) che da discariche controllate, è costituito principalmente da metano, CH4 (50÷70%) e anidride carbonica, CO2 (30÷50%). Il contenuto relativo di CH4 e CO2 nel biogas dipende principalmente dalla natura del substrato e dal pH nella massa in digestione. Oltre a questi due, il biogas contiene, inoltre, quantità minori di altri composti, come l'azoto (0÷3%), il vapore acqueo (5÷10%), l’ossigeno (0÷1%), l’idrogeno solforato (0÷10.000 ppmv), che è prodotto dalla riduzione del solfato contenuto in alcuni rifiuti, l’ammoniaca, proveniente prevalentemente da idrolisi di material…
INTRODUZIONE
2021
This volume is an anthology of scientific papers and essays from different national academic institutions on the regeneration of degraded environments and the tools of participation aimed at building a sustainable project. Papers were presented in September 2020 in a cycle of study seminars entitled 'Transformation, Regeneration and Participation' organised by the University of Palermo, in the International Conference 'Scenarios of Abusive Housing' and in the Round Table 'Designing Participation', in International seminary ‘ATS Architectural Technology and Sustainability. What regeneration?’ in November 2007, October 2008 and July 2011 respectively, in Agrigento, Palermo and Kos (Greece). A…
Renewed Sicilian Urban Landscapes. Transformation, Regeneration and Reuse of degraded areas
2020
In this study, through a multidisciplinary approach, some degraded Sicilian urban landscapes, today renewed thanks to urban regeneration interventions, will be ana-lyzed. Cities that look to the future and that react posi-tively to the current ecological and economic crisis. Urban centers that – through collective participation, the support of organizations, cultural associations and the sensitivity of local governments – are investing heavily in the theme of urban regeneration and re-cycling.