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.     

Educational Transfer of Sorts: The American credit system with Chinese characteristics

The credit allocation system, a prevalent element of American higher education, is designed to further general education. This paper assesses the success of transferring this American component into a Chinese context. After a general discussion of higher education and credit systems in their American and Chinese environments, the paper presents a case study. It explores from both a cultural and pedagogic perspective the employment of the credit system at Shenzhen University in southern China. Cultural, environmental and structural factors contribute to the transfer's ineffectiveness. Without systemic and structural changes, the educational reforms discussed will be unlikely to accomplish their stated goals of active learning and individualistic curricula. The narrowness of curriculum is likely to continue, unaffected by the credit system.     

Investigation of Poor Academic Achievement in Children with Duchenne Muscular Dystrophy

Duchenne Muscular Dystrophy (DMD) is a neurogenetic developmental disorder that presents with progressive muscular weakness. It is caused by a mutation in a gene that results in the absence of specific products that normally localize to muscle cells and the central nervous system (CNS). The majority of affected individuals have IQs within the normal range, generally with lower verbal than performance IQ scores. Prior work has demonstrated selective deficits on tests of verbal span and immediate memory. For the current study, 26 boys with DMD (and normal intellectual function) and their unaffected siblings were evaluated. Paired comparisons demonstrated that the children with DMD had significantly poorer academic achievement scores than their siblings, even though their vocabulary levels and home and educational environments were comparable. Children with DMD also had more behavioral concerns, physical disabilities, and poorer verbal memory spans. Linear regression indicated that behavioral concerns, executive function, and physical disability did not contribute substantially to academic performance, whereas performance on verbal span did. DMD presents with a selective developmental aberration in verbal span that has wide‐ranging consequences on learning skills.     

Research in Clinical Supervision: Revitalizing a Scientific Agenda

The purpose of this article was to revitalize and disentangle common misconceptions about a scientific agenda for clinical supervision.     

‘We Decided to Give it a Twirl’: single-sex teaching in English comprehensive schools

This article reports the recent experiences of single-sex teaching in 31 co-educational English comprehensive schools, often implemented because of the perceived need to raise boys' achievement. Since it was often undertaken on a short-term basis, its effectiveness is difficult to evaluate, although some positive aspects were noted in some schools in terms of raised achievement levels and increased confidence and participation in class. In other schools, however, single-sex teaching appeared to have little impact on achievement levels and led to increased problems of behaviour management in boys' classes, with male bonding between male teachers and male students reinforcing the qualities associated with hegemonic forms of masculinity. The authors conclude, therefore, by suggesting that single-sex classes can provide a positive and successful experience for girls and boys where there is strong commitment from staff, a willingness to evaluate and to diffuse good practice, but crucially where gender reform strategies are in place to challenge any practices and behaviours that reinforce stereotypical gendered roles.