Biodeterioration of Incralac used for the protection of bronze monuments

Outdoor bronze sculptures are highly susceptible to corrosion in many environments and organic coatings are widely used for their protection. The purpose of this study was to determine the susceptibility of the commonly used coating Incralac to biodeterioration by microorganisms. A yeast was isolated from a bronze statue treated with Incralac and its ability to degrade Incralac was determined using growth curves, scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). The organism grew slowly on Incralac in liquid culture, but SEM images demonstrated its ability to adhere to Incralac coated metal. Additionally, the yeast caused a rapid drop in the low frequency impedance of Incralac coated metal that was not observed under sterile conditions, indicating that the organism accelerated deterioration of the coating. The potential for microbial growth to accelerate deterioration of Incralac should be considered when developing a maintenance strategy for the protection of outdoor metal monuments.     

Restructuring reforms in Turkish teacher education: Modernisation and development in a dynamic environment

The paper examines the effectiveness of recent reforms in teacher education in Turkey, specifically the restructuring of programmes in university faculties of education. It first, briefly, sets the reforms of the 1990s in an historical context, prior to the 1997 Act which increased the length of compulsory schooling from 5 to 8 years, and the 1998 restructuring of faculties of education. It considers the national need for the restructuring of teacher education and the issues involved. The thrust of the paper is a study of how teacher educators across the country perceive both the changes and their effect on the quality of teacher education, methodology as a discipline, school partnerships, and relationships with the Ministry of National Education.     

Using web design with pre‐service teachers as a means of creating a collaborative learning environment

This study involves a group of over 300 third‐year Bachelor of Education students attending St Patrick’s College of Education, Dublin, Ireland. Working in groups of not more than three, the students completed an assignment to create a WebQuest. On construction of the WebQuest the students were asked to reflect on the experience, considering issues such as collaboration, cooperation, planning, decision‐making, time management, project direction and design. They were also asked to reflect on the impact of the exercise on their own learning styles and its influence on their concepts of teaching and learning. Finally, they were asked if the exercise had affected their ideas of how to use the Internet in school and if they envisage using WebQuests as part of their teaching in the future. Their reflections were facilitated by a questionnaire. Results of the project have implications for future course design.

Die Erstellung eines Webdesigns durch Lehramtsstudenten als Mittel, eine kollaborative Lernumgebung zu erzeugen

Diese Studie umfasst eine Gruppe von mehr als 300 Lehrerstudenten des St. Patrick’s College of Education in Dublin, Irland. In Gruppen von nicht mehr als drei Personen füllten die Studenten einen Zusatz zur Erzeugung eines Webfragebogens aus. Im Verlauf der Arbeit an der Konstruktion des WebQuest wurden sie aufgefordert, über die Erfahrung mit Dingen wie Zusammenarbeit, Kooperation, Planung, Entscheidungsfindung, Zeitmanagement, Projektziel und Konzeption nachzudenken. Zusätzlich wurden sie angehalten, über den Einfluss dieser Übung auf ihren eigenen Lehrstil und auf ihre Konzepte von Lehren und Lernen zu reflektieren. Schließlich wurden sie befragt, ob diese Übung ihre Einschätzung, wie das Internet im Schulunterricht genutzt werden könne und ob sie sich vorstellen könnten, WebQuests im Rahmen ihres zukünftigen Unterrichts einzusetzen. Ihre Reflexionen wurden durch einen Fragebogen unterstützt. Die Ergebnisse des Projekts haben Auswirkungen auf zukünftige Lehrgangsentwürfe.

Comment utiliser la conception de sites Web avec des enseignants en formation initiale pour créer un environnement d’apprentissage collaboratif

Cette étude porte sur un groupe de plus de 300 étudiants de Licence en Education inscrits à l’Institut St Patrick de formation des Maîtres de Dublin. Travaillant en groupes de trois au maximum, ces étudiants ont mené à bien un projet de création d’un WebQuest.Au moment de la construction de ce WebQuest, on a demandé aux étudiants de réfléchir sur l’expérience en cours et sur les problèmes de collaboration, de coopération, de planification, de prise de décision,de gestion du temps,d’ orientation et de conception du projet. On leur a aussi demandé de réfléchir à l’impact de cet exercice sur leurs propres styles d’apprentissage et à son influence sur la façon dont ils envisageaient l’enseignement et l’apprentissage.On les a finalement interrogés pour savoir si cet exercice avait affecté leur façon de penser aux usages de l’Internet à l’école et si ils (elles) envisageaient d’utiliser WebQuest dans leur enseignement à l’avenir. Un questionnaire a facilité la réponse à ces questions. Les résultats de ce projet auront des conséquences pour la conception des cours à venir.     

Text messaging in the school lives of American high school girls

Digital technologies open new windows for ethnographic explorations of cultural experiences. In this paper, we examine text messaging among academically talented teenage girls of colour at three US urban high schools. Texting introduced a new communication modality into the girls’ lives and created a space for new discourses mediating their participation in school. We draw on the concept of ‘serious play’ to reveal the paradoxical nature of the girls’ texting. At each school, distinct text-messaged discourses emerged – with implications for ethnographic studies of discourse and young people’s commitments to schooling.     

Do more hours in center-based care cause more externalizing problems? A cross-national replication study

Whether high quantities of center-based care cause behavior problems is a controversial question. Studies using covariate adjustment for selection factors have detected relations between center care and behavior problems, but studies with stronger internal validity less often find such evidence. We examined whether within-child changes in hours in center-based care predicted changes in externalizing problems in toddlers and preschoolers (N = 10,105; 49% female; data collection 1993–2012) in seven studies, including from Germany, Netherlands, Norway, two from Canada and two from the U.S. Race/ethnicity data were only collected in the United States (57% and 80% White; 42% and 13% African-American; 1.2% and 5% Latinx). Meta-analyses showed no association (r = .00, p = .88) between hours in center-based care and externalizing problems.