Development and Validation of a Digital Literacy Scale for Teenagers

[EN]Research related to digital literacy has grown exponentially in recent years. Its importance is that some scholars suggest that digital skills are a prevention tool against the risks of digital technologies. These risks are especially important because of their psychological consequences on adolescents. Thus, digital literacy could be a health prevention tool. The purpose of this research was to develop and validate a scale to assess digital literacy on teenagers. A self-report questionnaire with 47 items measured in a 5-point Likert scale was developed. After a pilot study, the questionnaire was administered to a sample composed by 715 secondary school students from 13 schools in Spain, aged between 12 and 20 years. Exploratory factor analysis revealed the existence of six factors: technological skill, personal security skill, critical skill, devices security skill, informational skill and communication skill. The scale demonstrated support for internal consistency reliability in most of the factors, with Cronbach’s Alpha levels ranging from .63 to .75, and validity. Further research is needed to confirm the factor structure

Nucleation mechanism for the direct graphite-to-diamond phase transition

Graphite and diamond have comparable free energies, yet forming diamond from graphite is far from easy. In the absence of a catalyst, pressures that are significantly higher than the equilibrium coexistence pressures are required to induce the graphite-to-diamond transition. Furthermore, the formation of the metastable hexagonal polymorph of diamond instead of the more stable cubic diamond is favored at lower temperatures. The concerted mechanism suggested in previous theoretical studies cannot explain these phenomena. Using an ab initio quality neural-network potential we performed a large-scale study of the graphite-to-diamond transition assuming that it occurs via nucleation. The nucleation mechanism accounts for the observed phenomenology and reveals its microscopic origins. We demonstrated that the large lattice distortions that accompany the formation of the diamond nuclei inhibit the phase transition at low pressure and direct it towards the hexagonal diamond phase at higher pressure. The nucleation mechanism proposed in this work is an important step towards a better understanding of structural transformations in a wide range of complex systems such as amorphous carbon and carbon nanomaterials

Digital identity of researchers and their personal learning network

Paper produzido no âmbito da Tese de Doutoramento em Educação, especialidade de Educação a Distância e eLearning (EDeL), Universidade Aberta.In a networked society, everyday experience is shared in networks at a personal, professional and academic level. Thus, there is a need to have digital literacy skills to obtain and produce contents in a collaborative way, sharing the knowledge acquired in the personal learning network. This paper is a reflection of literature revision in the PhD project of Online Distance Education and e-learning, concerning themes such as digital identity and personal learning networks. In this way we aim to make a literature analysis about the necessity of digital literacy so that we may obtain competencies for a personal learning network.info:eu-repo/semantics/publishedVersio

Learning through 'prosuming': Insights from media literacy programmes in Asia

10.1177/097172180801300205Science, Technology and Society132259-27

Preparing isiXhosa home language teachers for the 21st century classroom: Student teachers' experiences, challenges and reflections

The aim of the article is to identify the gaps between theory and practice in pre-service teacher training with special reference to the teaching of isiXhosa as a home language in the Further Education and Training (FET) phase (Grades 10–12) in some Western Cape high schools. The article is based on data that was collected from Postgraduate Certificate in Education (PGCE) students taking isiXhosa (home language) as one of their teaching method subjects as part of their pre-service training. The data were collected by means of an open-ended questionnaire, semi-structured interviews and an analysis of student teachers’ reflective journals. The article provides an analysis of PGCE students’ experiences and reflections on the teaching of isiXhosa as a home language in schools. It argues that if there is a gap between theory underpinning initial pre-service training and actual practice in schools, there will be no significant improvement in the teaching of isiXhosa as a home language. It concludes by proposing ways of improving both pre-service and in-service teacher education practice to develop African languages as academic or intellectual languages at school level

DNA vaccination for prostate cancer: key concepts and considerations

While locally confined prostate cancer is associated with a low five year mortality rate, advanced or metastatic disease remains a major challenge for healthcare professionals to treat and is usually terminal. As such, there is a need for the development of new, efficacious therapies for prostate cancer. Immunotherapy represents a promising approach where the host’s immune system is harnessed to mount an anti-tumour effect, and the licensing of the first prostate cancer specific immunotherapy in 2010 has opened the door for other immunotherapies to gain regulatory approval. Among these strategies DNA vaccines are an attractive option in terms of their ability to elicit a highly specific, potent and wide-sweeping immune response. Several DNA vaccines have been tested for prostate cancer and while they have demonstrated a good safety profile they have faced problems with low efficacy and immunogenicity compared to other immunotherapeutic approaches. This review focuses on the positive aspects of DNA vaccines for prostate cancer that have been assessed in preclinical and clinical trials thus far and examines the key considerations that must be employed to improve the efficacy and immunogenicity of these vaccines