Technical replicas of Portuguese ceramic tile bodies produced in the Oporto region in the late nineteenth to early twentieth centuries

Portugal is well known for its facades decorated entirely with ornamented glazed ceramic wall tiles called azulejos. On ageing, the tiles may detach and fall off, or deteriorate to such an extent that it becomes necessary to replicate them. Hence tile replication is a common practice in Portugal for façade restoration, but very often these new tiles do not have the same physical and/or chemical properties as the original ones. Such differences might be a factor in differential deterioration of the façades after restoration. One step toward an improvement in compatibility is to make new ceramic bodies with the same characteristics as the original ones. This study focuses on two types of glazed ceramic wall tiles from the Oporto region in Portugal: ‘calcic faience’ and pó de pedra. A total of 25 samples from the late nineteenth to early twentieth centuries were studied systematically as an attempt to improve knowledge of these materials and to create a basis for their replication. All samples were collected from facades that were under conservation/restoration at the time when sampling was performed. The original traditional ceramic bodies were analyzed by X-ray diffraction and X-ray fluorescence. Total open porosity, capillary absorption coefficient, and mercury intrusion porosimetry were also measured in order to gain knowledge on their physical characteristics in addition to their chemical and mineralogical compositions. High-temperature crystalline phases such as diopside, gehlenite, and mullite were found in the calcic faience, suggesting that the firing temperature of calcic faience bodies was within the range of 1100–1150?°C. Calcination trials were also performed in order to determine the most probable firing temperatures of the ceramic bodies. Collected data led to the assumption that the raw materials used for the ceramic bodies were kaolinitic clay, quartz sand, limestone, and talc. The raw materials for pó de pedra tiles were found to include kaolinite clay and quartz with firing temperatures estimated within the temperature range of 1150–1360?°C. Technical replicas made on the basis of these investigations were found to have the same mineralogical and capillary properties as the original tiles.     

Developing the next generation of engaged youth: Inspire Aspire – Global Citizens in the Making

School-based character education (CE) programs provide an opportunity to increase the moral fortitude of adolescents. This study is a preliminary evaluation of Inspire Aspire, a CE program that was implemented with 13- to 14-year-olds in Scotland. A relational developmental systems meta-theoretical approach and person-centered analyses were employed to understand whether teacher implementation variability is associated with student outcomes. The study aimed to: assess variation in program implementation across teachers; assess student poster quality, which served as a youth outcome measure; and, assess the relationship between variations in program implementation and poster quality. Teachers who fully integrated Inspire Aspire with the broader curriculum (as opposed to using it as a standalone program) as well as teachers who made more modifications to Inspire Aspire tended to have students with higher quality posters. This finding stands in contrast to the common narrative regarding evidence-based programs that requires teachers to strictly adhere to program guidelines in order to maintain implementation fidelity.     

Physics teaching and learning with multimedia applications: a review of teacher-oriented literature in 34 local language journals from 2006 to 2015

Teacher-oriented journals provide many ideas for practical use of multimedia in physics teaching and learning. However, they are often written in their respective native languages. Moreover, having 24 official languages in the European Union is a huge barrier to the exchange of teaching and learning material. Knowledge about what is discussed in neighbouring countries is rare. Hence, in this article scientific members of the MPTL group (Multimedia in Physics Teaching and Learning) present a review on multimedia applications and the corresponding concepts that are discussed in non-English language journals. 491 articles in 34 teacher-oriented journals from 10 countries are reviewed, using a list of 81 categories, to characterise addressed topics, teaching strategies, technology and multimedia features. Log-linear multiway frequency and cluster analysis were used to get more insights about preferred combinations of content and teaching strategies, differences between countries, changes between periods and patterns of articles. There is a divergence in the main topics focused on between countries and some changes within the periods 2006–2010 and 2011–2015. Such a large diversity of ideas and concepts covered throughout the EU highlights the potential benefits of more international exchange. However, findings also point to additional requirements, concerning theoretical background, ideas for implementations of modern features like augmented reality, and the use of internet-based sources and modern devices. Thus this article is also calling for more exchange and discussions concerning topics to be addressed in teacher-oriented journals.     

Combined effects of pre-cooling and water ingestion on thermoregulation and physical capacity during exercise in a hot environment

The aim of the present study was to determine the combined effects of pre-cooling and water ingestion on thermoregulatory responses and exercise capacity at 32 degrees C and 80% relative humidity. Nine untrained males exercised for 60 min on a cycle ergometer at 60% maximal oxygen uptake (VO2max) (first exercise bout) under four separate conditions: No Water intake, Pre-cooling, Water ingestion, and a combination of pre-cooling and water ingestion (Combined). To evaluate the efficacy of these conditions on exercise capacity, the participants exercised to exhaustion at 80% VO2max (second exercise bout) following the first exercise bout. Rectal and mean skin temperatures before the first exercise bout in the Pre-cooling and Combined conditions were significantly lower than in the No Water and Water conditions. At the end of the first exercise bout, rectal temperature was lower in the Combined condition (38.5 +/- 0.1 degrees C) than in the other conditions (No Water: 39.1 +/- 0.1 degrees C; Pre-cooling: 38.7 +/- 0.1 degrees C; Water: 38.8 +/- 0.1 degrees C) (P < 0.05). Heat storage was higher following pre-cooling than when there was no pre-cooling (P < 0.05). The final rectal temperature in the second exercise bout was similar between the four conditions (39.1 +/- 0.1 degrees C). However, exercise time to exhaustion was longer (P < 0.05) in the Combined condition than in the other conditions. Total sweat loss was less following pre-cooling than when there was no pre-cooling (P < 0.001). Evaporative sweat loss in the Water and Combined conditions was greater (P < 0.01) than in the No Water and Pre-cooling conditions. Our results suggest that the combination of pre-cooling and water ingestion increases exercise endurance in a hot environment through enhanced heat storage and decreased thermoregulatory and cardiovascular strain.     

Of drama,dreams and desire: creative approaches to applied sex education in southern Africa

In the midst of a generalised HIV and AIDS epidemic in southern Africa, the argument for more coordinated and comprehensive youth sexual health interventions is intensifying. Yet the crucial question of how best to provide young people with these skills and knowledge remains a key challenge for policy-makers, researchers and practitioners in our region. Moreover, amongst the available literature on sex education in southern Africa, few authors have taken an applied perspective, to look at fresh approaches and tools with the potential to be implemented more broadly. This paper argues for a greater focus on concepts of masculinity and sexuality in the development of sexual health efforts in southern Africa. It aims to bridge theory and practice by advancing six promising approaches with the potential to create a suitable space and environment for participants to engage with these issues. Approaches include methods and tools currently being implemented in existing programmes, as well as ideas emerging from recent literature. Our paper is ultimately a call for further ‘out-of-the-box’ thinking to find more effective and creative practical ways of providing the sexual health education our region's youth urgently needs. It is also a call for more applied research, to better inform future sex education programmes in southern Africa.     

Young Children’s Mathematical Learning From Intelligent Characters

Children’s math learning (N = 217; M_age = 4.87 years; 63% European American, 96% college-educated families) from an intelligent character game was examined via social meaningfulness (parasocial relationships [PSRs]) and social contingency (parasocial interactions, e.g., math talk). In three studies (data collected in the DC area: 12/2015–10/2017), children’s parasocial relationships and math talk with the intelligent character predicted quicker, more accurate math responses during virtual game play. Children performed better on a math transfer task with physical objects when exposed to an embodied character (Study 2), and when the character used socially contingent replies, which was mediated by math talk (Study 3). Results suggest that children’s parasocial relationships and parasocial interactions with intelligent characters provide new frontiers for 21st century learning.     

Self-directed learning and guidance in non-formal open courses

Digital media and open educational resources (OER) are said to redraw the boundaries between learners and teachers, by weakening the centralization of expertise and the distribution of subject-matter authority. This paper presents the findings of an ethnographic study of how the use of OER mediates the relations between self-directed learners and facilitators in two online open courses offered at a non-formal educational organization. Findings highlight the different role played by OER in mediating the relations between learners and facilitators in the two courses. In one course, early-stage learners encountered difficulties in repurposing OER and needed help to move to a more advanced stage of conceptual understanding. In the other course, well-read participants used OER to develop an affinity space in which the facilitator was a fellow learner. The findings suggest that OER are better viewed as artifacts-in-interaction rather than resources to be delivered as they are to learners. Although facilitators at P2PU do not play the role of academic teachers, it is argued that the influence of OER on the facilitator role can have implications for that of the academic teachers as well.