The Influence of Hygroscopic Materials on the Fluctuation of Relative Humidity in Museums Located in Historical Buildings

ABSTRACT

The preservation of artefacts in museum collections is profoundly affected by fluctuations in temperature and, especially, relative humidity (RH). Since the late nineteenth century, many studies have been carried out on the best way to control hygrothermal conditions. In old buildings located in maritime temperate climate zones (such as Portugal) with strong thermal inertia, and which have low ventilation rate (relative to the volume and number of visitors), daily and seasonal hygroscopic inertia may help to assure the maintenance of RH stabilization conditions. The use of expensive active systems may be minimized through the passive behaviour of internal finishing building materials. This work presents the results of an experimental laboratory study conducted in a flow chamber to demonstrate the enormous potential of hygroscopic materials in stabilizing interior relative humidity. Based in these results and in-situ monitoring in a museum housed in a building, located in Porto, with a typical construction of the 1950s (granite masonry and reinforced concrete slabs), a numerical analysis was done to quantify the influence of hygroscopic materials in stabilizing the interior relative humidity.     

Neoliberalism,global poverty policy and early childhood education and care: a critique of local uptake in England

The global rise of a neoliberal ‘new politics of parenting’ discursively constructs parents in poverty as the reason for, and remedy to, child poverty. This allows for Early Childhood Education and Care (ECEC) to become a key policy lever by using human technologies to intervene in and regulate the lives of parents and children in poverty. The article explores the uptake of this policy locally through interviews with 30 ECEC practitioners in three locations across England. The interviews suggested that the neoliberal discursive formation of child poverty as a problem of the poor themselves had symbolic power and was a view shared by most of the interviewees. This appeared to restrict their thinking and action, shaping a limited engagement with parents in poverty. Delivering curricular requirements was seen to further delimit practitioners’ practices with children in poverty by reducing their poverty sensitivity. Although this is a small study, its findings may be of value in questioning neoliberal logics, and their implications are considered critically.     

Perceived Utility of Methods and Instructional Strategies Used in Online and Face-to-face Teaching Environments

The purposes of this study were to compare the instructional methods and strategies identified as useful in online teaching environments with those used in a face-to-face teaching environment, to investigate relationships between the perceived usefulness of instructional strategies and methods used by higher education faculty in both teaching environments, and to identify instructional methods transferred from an online to a face-to-face teaching environment. The following instructional methods were found to have a significant relationship with the instructional environment: student collaborative projects, student-to-student electronic discussions, lecture (direct instruction), questioning and feedback to students, and e-mail communication with the instructor. Both authors are at Drake University. Peggy Steinbronn. Ed.D., Drake University, is the Instructional Technology Manager. Special interests include technology integration, faculty professional development, and online instruction. Eunice Merideth, Ph.D., Iowa State University, is the Associate Dean of the Drake School of Education. Her special interests include technology integration, social justice, and distance learning. Contact the authors at peggy.steinbronn@drake.edu and eunice.merideth@drake.edu     

How do teachers help children to learn? An analysis of teachers' interventions in computer-based activities

In British schools, educational software is normally used by children working under the supervision of a teacher, who will have set them specific tasks and organize them to work at the computer in pairs or groups. However, those theories of learning which have most influenced research into the design and use of educational software have been essentially concerned with individualized learning, and are insensitive to the nature of teaching and learning as a communicative, culturally-based process. The present paper discusses an alternative theoretical perspective, one derived from the work of Vygotsky. This is used in an analysis of interventions made by teachers in the computer-based activities of their pupils, using observational data gained from video-recordings of primary school classrooms. The usefulness of the theoretical perspective is evaluated, and implications for the development of computer-based activities are discussed.     

Material encounters and media events: what kind of mathematics can a body do?

This paper contributes to research on the material dimensions of teaching and learning mathematics, arguing that perception is not sensory integration or synthesis of multi-modal information, but rather a speculative investment in specific material encounters. This approach entails sociopolitical consequences for how we work with dis/ability in mathematics classrooms because it foregrounds how the relationship between sense (as meaning) and sense (as sensation) can be fundamentally altered. I focus on how visual perception in mathematics can be reconceived in these terms, drawing principally on the philosophical insights of Michel Serres and Brian Massumi. This paper shows how philosophical work on perception can shed light on embodied mathematics, opening up discussion about the potentiality of the human body.