Novel insight into bronze disease gained by synchrotron-based photoelectron spectro-microscopy,in support of electrochemical treatment strategies

A recent assessment (Giovannelli, G., D'Urzo, L., Maggiulli, G., Natali, S., Pagliara, C., Sgura, I. & Bozzini, B. 2010. Journal of Solid State Electrochemistry, 14: 479–94.) of the corrosion state of a late Bronze Age artefact (ca. 1100 BCE) exposed to a coastal environment, based on optical and scanning electron microscopies, X-ray fluorescence mapping, and X-ray diffractometry, led to recognition of bronze disease conditions essentially related to the presence of nantokite locked inside mesoscopic subsurface pits. The object was then treated successfully with a novel electrochemical approach specifically designed to allow penetration of the electric field into deep, screened pits. In order to further develop and optimize this promising approach by fine-tuning the capabilities of electrochemical control, more insight is required on the specific morphochemistry of the corrosion product scenario. To this end, here we report a space-dependent compositional and chemical-state analysis, performed with synchrotron-based scanning photoelectron microspectroscopy. The investigated object consists of a segregated cast bronze. The prevailing corrosion form is preferential attack of Sn-rich phases, accompanied by a synergistic type of Sn and Cu attack triggered by the peculiar type of decuprification taking place in a bronze disease framework and characterized by the formation of Sn(OH)Cl as a result of local HCl generation in the Cu corrosion process.     

Reframing the teacher profession as a dynamic multifaceted profession: A wider perspective on teacher quality and teacher competence frameworks

Many countries in Europe use some kind of competence framework to define the quality of teachers. They typically formulate one level of teaching quality which defines the competence level that teachers must have acquired after completing initial teacher education. In addition, most countries provide limited career structures that define career opportunities within the teacher profession itself, resulting in a profession where often the only option for career progression is to move to leadership positions. Competence frameworks that create opportunities for vertical and horizontal career structures can make being a teacher a more attractive profession. They offer teachers opportunities for ‘career crafting’ and professional growth and supply school leaders with tools for more elaborate career guidance. In this article, we present a framework that was developed in the Netherlands to support teacher growth and teachers' career development. It has been used as a starting point for creating a shared language and understanding of the teacher profession and as a catalyst for dialogue between teachers and school leaders on professional growth. We elaborate the main characteristics of the resulting model, its limitations, the feedback that has been collected and how this feedback has been incorporated in how the model is used and discussed by teachers, school leaders and teacher education institutes. Finally, we argue that the strength of the framework can be explained by the way it acts as a boundary object, inspiring mutual learning and dialogue between different activity systems (of teachers, school leaders and teacher educators).     

The impact of digital skills on educational outcomes: evidence from performance tests

Digital skills are increasingly important for labour market outcomes and social participation. Do they also matter for academic performance? This paper investigates the effects of digital literacy on educational outcomes by merging data from the Italian National Assessment in secondary schools with an original data-set on performance tests of Internet skills for tenth-grade students. Our identification strategy relies on a rich set of individual, family, school and classroom control variables that are not commonly available in previous studies. The findings indicate that, overall, Internet skills have a positive impact on academic achievement. This effect is stronger for students with low academic performance or low family background. It is also stronger for students in technical or vocational schools.     

Teachers’ perceptions of effective teaching: a theory-based exploratory study of teachers from China

There is general agreement that teachers matter the most when it comes to student learning. However, there is an unquestionable need for educators to understand what constitutes effective teaching in K-12 classrooms. This research studied Chinese high school (N = 359) teachers’ perceptions of effective teaching using an international theoretical framework as guidance. Basic statistics described Chinese teachers’ perceptions on different domains of the teaching effectiveness framework. Statistically, significant results were found when comparing subject matter, gender, teaching experience, school type, award, academic rank and leadership. Furthermore, Chinese and American teachers’ perceptions on effectiveness were compared and contrasted. This study revealed that some findings were rooted in Confucian cultural tradition while others related to China’s current educational reform. Implications, recommendations and limitations are discussed.     

The efficiency change of Italian public universities in the new millennium: a non-parametric analysis

The paper assesses the evolution of efficiency of Italian public universities for the period 2000–2010. It aims at investigating whether their levels of efficiency showed signs of convergence, and if the well-known disparity between northern and southern regions decreased. For this purpose, we use a refinement of data envelopment analysis, namely window analysis, which allows for measuring efficiency in cross-sectional and time-varying data. We find that the efficiency of most universities registered only marginal changes in the period, although a notable re-ranking occurred. However, changes in the management of universities, consequential to the reform processes, did not affect the long-run tendencies, such as the persisting difference in performance between north and south.     

Video over IP using standard-compatible multiple description coding: an IETF proposal

INTRODUCTION Communication networks are growing quickly. Throughput, delays and losses become unpredictable because of heterogeneity and congestion. This results in lack of quality of service. Today’s solution is based on standard video codecs (as MPEG-2) that do not allow scalability and yield low quality at low bit-rates, complex forward error correction (FEC) codes that are not easily used with time-varying channels and must be set to face the worst case, and automatic repeat re- q…     

Classroom discussion and individual problem-solving in the teaching of history: Do different instructional approaches affect interest in different ways?

In this study, 100 Italian eighth graders were divided into two groups to compare the effects of two instructional interventions – the first based on problem-solving through discussion, the second on individual problem-solving – on students' learning of two historical topics (World War I and the economic boom), interest and self-perception of competence in history. The intervention based on discussion produced greater situational interest and understanding of the historical inquiry. The topic of World War I turned out to be an effective source of situational interest. Structural equation models showed that situational interest elicited by the use of discussion and by World War I impacted both on students' individual interest and on self-perception of competence in history.     

Women,capitalism and education: On the pedagogical implications of postfeminism

Abstract

We examine the emergence of the ‘postfeminist’ sensibility from feminist theory and praxis, and its relation and relevance to education. Analytical frameworks such as postfeminism and intersectionality have given equal weight to recognition-based struggles, such as those based on sexual, racial, class-based, gender-related identities. We follow Nancy Fraser’s argument that these identity-based movements have been co-opted by neoliberal politicians and bureaucratic policy-makers, and become a divide and rule strategy, neglecting the subjugating power of capital. Beginning with third-wave feminism’s emphasis on individual identity, women’s struggles have been become a part of the greater parisitic neoliberal project. We consider the implications of this docile and domesticated feminism for the education of women.     

Reading Aloud Narrative Material as a Means for the Student's Cognitive Empowerment

Listening to stories and brain processing of narrative material activates many areas devoted not only to the linguistic processing. In this sense, it could be hypothesized that if this activity would be integrated within the school curricula, it could bring benefits in terms of understanding the text as well as in basic essential cognitive dimensions. In a series of studies with different age groups, we investigated the effects of an intensive training in narrative listening, through different tools such as the standardized tests of understanding of the text. We also used a neuropsychological battery investigating basic cognitive processes (cognitive assessment system) that are directly related to the ability of text comprehension. Results show a significant improvement in all tests for all age groups in the experimental groups, in comparison with the control groups.