Epistemological Issues Concerning Computer Simulations in Science and Their Implications for Science Education

Computers and simulations represent an undeniable aspect of daily scientific life, the use of simulations being comparable to the introduction of the microscope and the telescope, in the development of knowledge. In science education, simulations have been proposed for over three decades as useful tools to improve the conceptual understanding of students and the development of scientific capabilities. However, various epistemological aspects that relate to simulations have received little attention. Although the absence of this discussion is due to various factors, among which the relatively recent interest in the analysis of longstanding epistemological questions concerning the use of simulations, the inclusion of this discussion on the research agenda in science education appears relevant, if we wish to educate scientifically literate students in a vision of the nature of science closer to the work conducted by researchers today. In this paper we review some contemporary thoughts emerging from philosophy of science about simulations in science and set out questions that we consider of relevance for discussion in science education, in particular related with model-based learning and experimental work.     

Support for distance learners in a Nigerian distance education programme

This paper reports on a research study that draws on the perceptions of students, tutors, field centre coordinators and central management to evaluate the support services provided to students in the National Teachers’ Institute’s distance teacher training programme. Within a conceptual framework that built upon models of teaching and learning at_A_distance, both quantitative and qualitative approaches were used for data collection and analysis. Although the major forms of support provided were found to be relevant to students, the study highlights the need to improve the current level of student satisfaction by strategies that will improve the supply of course materials and tutorial support, enhance students networking and exploit the use of multimedia.     

Partly Cloudy With a Chance of Entertainment: An Academic Library's Experience With a Popular Reading Ebook Resource

ABSTRACT

Ebooks pose many challenges in library collection development, mostly due to the lack of standards and the many different platforms available. These challenges are faced by both public and academic libraries, but the challenges inherent in collecting popular reading ebooks can be different from the challenges that come with collecting scholarly ebooks. This article describes the purpose and processes behind an academic library, University of Wyoming Libraries, providing popular reading ebooks to its faculty and students, and focuses on the experience of being a 3M Cloud Library early adopter.     

Impact of a full‐time integrated program on the achievement of nonhandicapped and mildly handicapped children

Abstract

We compared achievement gains of mildly handicapped and nonhandicapped third graders in a full‐time integrated program, Team Approach to Mastery (TAM), with gains of similar students in regular classrooms and resource‐room programs. Comparisons of residualized gain scores on the Comprehensive Test of Basic Skills showed that nonhandicapped students made substantially greater gains in full‐time integrated TAM classrooms than both mildly handicapped students in the same classrooms and nonhandicapped students in regular classrooms. Although mildly handicapped students in integrated TAM classrooms tended to experience greater gains than students in resource rooms, differences were significant only in math. Overall, results indicated the effectiveness of the TAM model, particularly when achievement gains of nonhandicapped and mildly handicapped students are contrasted with those reported in a more popular, and complex, integrated classroom model.     

Hydrogel discs for digital microfluidics

Hydrogels are networks of hydrophilic polymer chains that are swollen with water, and they are useful for a wide range of applications because they provide stable niches for immobilizing proteins and cells. We report here the marriage of hydrogels with digital microfluidic devices. Until recently, digital microfluidics, a fluid handling technique in which discrete droplets are manipulated electromechanically on the surface of an array of electrodes, has been used only for homogeneous systems involving liquid reagents. Here, we demonstrate for the first time that the cylindrical hydrogel discs can be incorporated into digital microfluidic systems and that these discs can be systematically addressed by droplets of reagents. Droplet movement is observed to be unimpeded by interaction with the gel discs, and gel discs remain stationary when droplets pass through them. Analyte transport into gel discs is observed to be identical to diffusion in cases in which droplets are incubated with gels passively, but transport is enhanced when droplets are continually actuated through the gels. The system is useful for generating integrated enzymatic microreactors and for three-dimensional cell culture. This paper demonstrates a new combination of techniques for lab-on-a-chip systems which we propose will be useful for a wide range of applications.     

The learning and study strategies of college students with ADHD

This study compared learning and study strategies of students with attention‐deficit/hyperactivity disorder (ADHD) to two groups: college students with learning disabilities (LD) and college students without disabilities. In addition, strengths and weaknesses within the ADHD group were examined on the Learning and Study Strategies Inventory, 2nd edition (LASSI; C.E. Weinstein & D.R. Palmer, 2002). The LASSI was also evaluated as a predictive measure for academic achievement for college students with ADHD compared to other students. Results indicate that several important differences may exist in the learning and study strategies of students with ADHD versus students with LD and students without disabilities. However, the LASSI may not be a useful tool for predicting academic achievement for college students with ADHD. Interventions for working with students with ADHD are given. © 2007 Wiley Periodicals, Inc.