Influence of Process Parameters on Chlorinated Biocide Decontamination by li-CO2 on Artificially Contaminated Model Materials

ABSTRACT

Previously, heavy use of biocides for the treatment of objects made of organic materials in museum collections (e.g. ethnographic, historical collections) was very common. Now suitable decontamination methods/technologies are being sought. A decontamination treatment by li-CO₂ was optimized that considered the specific requirements of museum objects. The treatment was tested on model materials artificially contaminated with biocide solutions containing dichlorodiphenyltrichloroethane (DDT), pentachlorophenol (PCP), lindane, and permethrin or cypermethrin. High decontamination was achieved for DDT, lindane, PCP, and permethrin on artificially biocide loaded wool and wood model materials. Optimal process parameter settings for li-CO₂ decontamination include a single 30?min cycle for woolen materials and three sequential 30?min cycles each for wood. These methods allow a reduction of at least 90% of all biocides for wool and between 70% and 85% for wood. Decontamination of the latter was more effective for less polar biocides as DDT and permethrin. Despite a significant improvement in decontamination for wood using co-solvents such as acetone, ethanol, and methyl tertiary-butyl ether (MTBE), their use is not recommended due to the increased risk of damage to the objects, in particular if a surface coating is present.     

Evolving technologies support mobile and collaborative curriculum: a case study

This case study describes the efforts of librarians to integrate mobile devices, collaboration tools, and resources into a School of Medicine third-year pediatric clerkship. Additional class emphasis is on evidence-based searching and journal article evaluation and presentation. The class objectives ensure that students are comfortable with mobile devices and collaboration tools. Over the eight-year history of the course, student acceptance of the mobile devices used diminished as the devices aged, necessitating the evaluation and selection of new technologies. Collaboration tools and mobile applications employed in the course evolved to accommodate curriculum changes.     

Evolving Technologies Support Mobile and Collaborative Curriculum: A Case Study

This case study describes the efforts of librarians to integrate mobile devices, collaboration tools, and resources into a School of Medicine third-year pediatric clerkship. Additional class emphasis is on evidence-based searching and journal article evaluation and presentation. The class objectives ensure that students are comfortable with mobile devices and collaboration tools. Over the eight-year history of the course, student acceptance of the mobile devices used diminished as the devices aged, necessitating the evaluation and selection of new technologies. Collaboration tools and mobile applications employed in the course evolved to accommodate curriculum changes.     

Conservation of stained glass windows with protective glazing: Main results from the European VIDRIO research programme

The methodology of protecting the European stained glass windows against environmental risk (e.g. meteorological factors, air pollution, microorganisms) by means of an external glazing is not new. In spite of many scientific studies carried out in the last 20 years, some questions were still up for discussion. The European VIDRIO (2002–2005) project gave an answer to these questions. The research carried out by the different project partners established a new multidisciplinary approach aimed at evaluating the efficiency of the protective glazing systems and their effects on stained glass windows conservation, and finally at assessing the most appropriate strategy to preserve stained glass windows. Scientific results showed that the so-called isothermal glazing (i.e. ventilation by the air coming from the inside of the building) protected efficiently the ancient stained glass window from environmental attack (i.e. rain, pollutants, condensation, thermal shocks) with very limited secondary effects. The scientific research highlighted that its efficiency was strongly related to the technical design of the protective system. In particular, the ventilation and the size of the interspace had to be carefully considered. The research developed within the VIDRIO project was turned into general recommendations to the owners and practitioners on the best practice for the stained glass windows future conservation.     

Books,Bytes, and Buildings: The Academic Library's Unique Role in Improving Student Success

Student persistence and completion are paramount in higher education, and institutions are employing targeted programs and initiatives to address these concerns. The academic library can play an especially important role in these efforts, given its unique interdisciplinary mission and its integrated instructional programs. With a foundation in both higher education and library and information science literatures, this article describes how one academic library engaged in cross-campus programs, partnerships, and initiatives to contribute to student success efforts. Other libraries may find these examples useful as they consider how to frame their work in the context of their institutions’ student persistence efforts.     

Bullying and repeated conventional transgressions in Swedish schools: How do gender and bullying roles affect students’ conceptions?

Bullying is a moral transgression. Recognizing the importance of approaching bullying from a moral perspective, the present study examines whether children's judgments and reasoning to justify their judgments differ between bullying and repeated conventional transgressions. Our study also explores differences by gender and differences among bullies, victims, and uninvolved students. Participants included 381 students from 13 elementary schools in Sweden. Findings indicate that children judge bullying as more wrong than repeated conventional transgressions; use moral reasons more frequently in their justifications about bullying than about repeated conventional transgressions; and use conventional reasons more frequently to justify their judgments on repeated conventional transgressions as compared with bullying. Female students and nonbullies judged bullying and repeated conventional transgressions as more wrong and used moral reasons more frequently in their justifications of judgments of bullying than did male students and bullies. Male students reported bullying more than did female students. Implications for practice are also discussed.     

Institutional Innovation and Public Extension Services Provision: The Marche Regional Administration Reform in Central Italy

Abstract

This paper describes how Marche Regional Administration (MRA) introduced an innovative institutional reform of an Agricultural Knowledge and Information System (AKIS) in central Italy. In order to study the main features of the MRA reform we used a methodological approach based on three steps: (i) first we applied a desk analysis to sketch the main elements of the reform; (ii) we then analyzed farmers' assessment of the institutional change by using information derived from a field survey on a sample of beneficiaries, and (iii) using a focus group technique. We found that MRA reform introduced an institutional innovation in the domain of public extension services (ES) provision within the Italian context. However, the assessment of the short-term effects indicate that the original objectives of the reform have been only partially achieved. This is in line with other experiences presented in the literature and confirms the difficulties to introduce institutional innovation in the domain of AKIS. The paper describes the analysis of an institutional reform in the AKIS domain which has been considered a ‘best practice’ within the Italian context. Using an institutional analysis approach the paper provides an original way of looking at a ‘new’ model for organizing public ES.     

Relationship between accuracy and complexity when learning underarm precision throwing

Learning precision ball throwing was mostly studied to explore the early rapid improvement of accuracy, with poor attention on possible adaptive processes occurring later when the rate of improvement is reduced. Here, we tried to demonstrate that the strategy to select angle, speed and height at ball release can be managed during the learning periods following the performance stabilization. To this aim, we used a multivariate linear model with angle, speed and height as predictors of changes in accuracy. Participants performed underarm throws of a tennis ball to hit a target on the floor, 3.42 m away. Two training sessions (S1, S2) and one retention test were executed. Performance accuracy increased over the S1 and stabilized during the S2, with a rate of changes along the throwing axis slower than along the orthogonal axis. However, both the axes contributed to the performance changes over the learning and consolidation time. A stable relationship between the accuracy and the release parameters was observed only during S2, with a good fraction of the performance variance explained by the combination of speed and height. All the variations were maintained during the retention test. Overall, accuracy improvements and reduction in throwing complexity at the ball release followed separate timing over the course of learning and consolidation.     

Library as the Technology Hub for the Health Sciences

Abstract

Academic health sciences libraries have an important role in facilitating the use of technology in health sciences curricula. Serving as a technology hub, the library supports, advocates, and provides access to new technologies. The library introduces many faculty and students to new technology tools, techniques, and equipment for new multimedia creation. As the technology hub grows and expands, library personnel can provide expertise, which demonstrates the library's value in leading the exploration of new technology, including Do-It-Yourself multimedia tools, virtual reality, virtual anatomy, and 3D printing.