Search results for "Sources"
showing 10 items of 2554 documents
Special issue on Trends and challenges of sustainable irrigated agriculture
2014
In the twenty-first century, the shortage of freshwater is one of the most important environmental concerns facing several regions of the world because of the growing demand of increasing population, agricultural intensification, and economic growth. Global climate change will contribute to exacerbate the problem, generating new drought-prone areas and increasing those already characterized by severe aridity. Worldwide it is estimated that, on average, agriculture accounts for 70% of the total water consumption, compared with 10% for domestic consume and the remaining used by industry. Moreover, according to FAO estimates, by 2050 agricultural production has to increase by 60% to satisfy th…
Correlates and Predictors of L2 Willingness to Communicate in Polish Adolescents
2014
The concept of willingness to communicate (WTC) in L2 denotes “a readiness to enter into discourse at a particular time with a specific person or persons, using a L2” (MacIntyre et al. 1998, p. 547). In the early model of L2 WTC, there are two main variables influencing its levels: perceived communication competence and communication anxiety (MacIntyre 1994). WTC is now considered a fundamental goal of second language education (MacIntyre et al. 2003) because it offers L2 learners “greater chances for L2 practice and authentic L2 usage” (MacIntyre et al. 2001, p. 382). Students taking the risk of initiating communication in a language they do not know well are likely to become more proficie…
Formative assessment in higher education: analysis of the experience
2015
<p>Currently the learning is in the center of the education therefore the methods and techniques that promote learning become topical, inter alia higher education. Formative assessment is a significant part of the study process as a factor for promotion of the learning. The article analyzes the experience of formative assessment at the study course aimed at the development of writing competence and ensuring appropriate skills development.</p>
DC/DC converter topologies for electrolyzers: State-of-the-art and remaining key issues.
2017
In recent years, the use of electrolyzers to produce cleanly and efficiently hydrogen from renewable energy sources (i.e. wind turbines, photovoltaic) has taken advantage of a growing interest from researchers and industrial. Similarly to fuel cells, DC/DC converters are needed to interface the DC bus with the electrolyzer. Usually, electrolyzers require a low DC voltage to produce hydrogen from water. For this reason, a DC/DC buck converter is generally used for this purpose. However, other DC/DC converter topologies can be used depending on the feature of the electrolyzer and electrical grid as well. The main purpose of this paper is to present the current state-of-the-art of DC/DC conver…
Cogeneration from thermal treatment of selected municipal solid wastes. A stoichiometric model building for the case study on Palermo
2003
This paper aims to calculate the energetic and environmental effects of an integrated solid waste management system in Palermo, Italy. In particular, the thermal treatment of Municipal Solid Waste (MSW) with energy recovery is assessed. The current characterization at the local scale is taken into account. Two different options of collection are taken into account: (1) unselected wastes; and (2) sorted collection, according to the current Italian regulation. Combustion process is analyzed and the following features are calculated: (1) stoichiometric content of air and air excess; and (2) temperature and enthalpy of flue gases. Energy recovery is performed in the hypothesis of Hirn cycle bot…
Information sources used for vacation tourists in tourist destinations
2012
En esta investigación se analiza el uso de las fuentes de información y su incidencia en distintas etapas del proceso de decisión, incidiendo en la búsqueda de información realizada por los turistas en destino. Los resultados muestran que tanto el número y tipo de fuentes de información utilizadas, así como la intensidad de la búsqueda y las decisiones tomadas en destino, es muy diferente del que realizan los turistas antes de llegar a su destino vacacional. Basados en los resultados, como parte de las conclusiones, se exponen ciertas directrices de interés para la gestión empresarial, en relación a la utilización de fuentes de información en los destinos turísticos. This research examines …
Organizational commitment and its effects on organizational citizenship behavior in a high-unemployment environment
2016
[EN] Organizational commitment is an important concept in management and a construct on which extensive research exists. This study considers the relationship of the three dimensions of organizational commitment (affective, normative, and continuance commitment) with employees' organizational citizenship behavior in a high-unemployment environment. By analyzing the effect of high unemployment on the displacement of the self-concept from individual toward relational and collective levels, this work predicts differences in the effect of unemployment on each of the organizational-commitment dimensions. The results show that in a high-unemployment environment the affective and normative dimensi…
PROMOTION OF ADULT EDUCATION IN THE INNOVATIVE BUSINESS
2015
The notions of adult education and innovative entrepreneurship have been described and analysed in the article. According to the characterization of the essence of notions, conditions of innovative entrepreneurship have been analysed. The emphasis has been put on the main problem concerning sustainable community development related to the contributions made to human resources and adult education, enabling innovative entrepreneurship oriented on the human ability to create and use their knowledge in constantly changing environmental conditions, responsible for work organisation satisfying current people’s social and economical needs, thought at the same time not endangering next generations.…
READING COMPETENCE AND ENGAGEMENT OF LATVIAN STUDENTS IN THE VIEW OF OECD PISA 2018 RESULTS
2020
Students' reading competence determines the achievements of learners in all areas of school education as well as in their further education, professional activity and life. The results of the OECD Program for International Student Assessment - OECD PISA 2018 confirm the need to improve reading competence in Latvia (OECD, 2019).The aim of the study is to analyze the achievement of Latvia's fifteen-year-old students in OECD PISA 2018 and the previous international program cycles in relation to students' reading engagement and its changes. Reading engagement significantly influences not only students' reading competence but are in themselves one of the goals of modern education (Guthrie & …
'Not as safe as I believed': Differences in perceived and self-reported cycling behavior between riders and non-riders
2021
Cycling behavior remains a key issue for explaining several traffic causalities occurring every day. However, recent studies have shown how the assessment of the own safety-related behaviors on the road may substantially differ from how third parties assess them. Thus, the aim of this study was to evaluate the differences between cyclists’ self-reported behavior and the proxy-reported behavior that other (non-cyclist) road users perceive from bike riders. For this purpose, this study used data from two samples: (i) 1064 cyclists (M = 32.83 years) answering the Cycling Behavior Questionnaire—CBQ, and (ii) 1070 non-cyclists (M = 30.83 years) answering an adapted version of the CBQ for externa…