A Comparison of Medical Students’ Preferences for Structured and Unstructured Peer-Learning

A survey asked medical students studying the basic sciences to identify effective learning strategies. The purposes of the survey were three-fold: firstly, to identify learning strategies that students prefer; secondly, to encourage students to evaluate their learning strategies; and thirdly, to inform faculty about their students’ learning strategies. This paper compares the students’ preferences for informal peer-learning and Supplemental Instruction. The survey revealed that students use groups discerningly for both learning and support. They believe that SI is valuable for when they need help, for developing understanding, for preparing for tests, and for motivation. The paper concludes with a critical discussion of the students’ choices and recommendations about how faculty and students might use SI to strengthen the learning culture of a course

American Public Education and the Responsibility of Its Citizens: Supporting Democracy in the Age of Accountability

Sarah M. Stitzlein, American Public Education and the Responsibility of its Citizens: Supporting Democracy in the Age of Accountability. New York: Oxford University Press, 2017. 228 pp. ISBN 13: 978-0-19-065738-3. $35.00 (hardback)

ADAPTIVE MEMORY: ANIMACY AND THE METHOD OF LOCI

A functionalist approach to cognition assumes that people’s minds are tuned to process and remember information that benefits our survival or reproduction (Nairne, 2005). One source of information with potentially high fitness value is things that are alive and animate (Nairne, VanArsdall, Pandeirada, Cogdill, & LeBreton, 2013). The purpose of this dissertation was to explore the effects of using an ancient mnemonic – the method of loci – to examine memory for animate objects. Across four experiments, subjects used the method of loci to remember a list of animate or inanimate objects. I manipulated animacy by using animate or inanimate words (Experiments 1 and 4) or by using animate or inanimate images (Experiments 2, 3, and 4). In Experiment 1, memory for animate and inanimate words was tested in either the method of loci or a pleasantness ratings control condition. Subjects learned a list of words; half of the words were animate and the other half were inanimate. Subjects in both conditions recalled more animate than inanimate words. The animacy effect in the method of loci was smaller relative to the pleasantness condition

The value of play for conflict management: a case study

This is a case study of a conflict management intervention in two secondary schools in post-apartheid South Africa.  The feature of the intervention that we examine is the use of play as an educational strategy. The literature attests  that play can facilitate change by allowing learners freedom to change their behaviour and opportunities to explore their new identities. The context of the case revealed that conflicts had become deeply entrenched over  time. The literature on conflict management suggests that such situations can change if approached in the right way. In the article we describe the intervention and evaluate it with the help of feedback received from participants and facilitators. In the evaluation we found that the participants were able to overcome prejudices and develop democratic approaches to conflict. The evaluation was repeated several months later, when it was found that the benefits of the workshop had been maintained, with the result that the participants were engaging in healthier relationships. Keywords: communication; conflict management; diversity; elicitive training; games; multicultural; play; problem-solving; role play; secondary schools South African Journal of Education Vol. 29 (1) 2009: pp. 53-6

Review: Marine natural products

This review covers the literature published in 2003 for marine natural products, with 619 citations (413 for the period January to December 2003) referring to compounds isolated from marine microorganisms and phytoplankton, green algae, brown algae, red algae, sponges, coelenterates, bryozoans, molluscs, tunicates and echinoderms. The emphasis is on new compounds (656 for 2003), together with their relevant biological activities, source organisms and country of origin. Biosynthetic studies or syntheses that lead to the revision of structures or stereochemistries have been included (78), including any first total syntheses of a marine natural product

Intelligent sampling for the measurement of structured surfaces

Uniform sampling in metrology has known drawbacks such as coherent spectral aliasing and a lack of efficiency in terms of measuring time and data storage. The requirement for intelligent sampling strategies has been outlined over recent years, particularly where the measurement of structured surfaces is concerned. Most of the present research on intelligent sampling has focused on dimensional metrology using coordinate-measuring machines with little reported on the area of surface metrology. In the research reported here, potential intelligent sampling strategies for surface topography measurement of structured surfaces are investigated by using numerical simulation and experimental verification. The methods include the jittered uniform method, low-discrepancy pattern sampling and several adaptive methods which originate from computer graphics, coordinate metrology and previous research by the authors. By combining the use of advanced reconstruction methods and feature-based characterization techniques, the measurement performance of the sampling methods is studied using case studies. The advantages, stability and feasibility of these techniques for practical measurements are discussed

Macroscopic Equations of Motion for Two Phase Flow in Porous Media

The established macroscopic equations of motion for two phase immiscible displacement in porous media are known to be physically incomplete because they do not contain the surface tension and surface areas governing capillary phenomena. Therefore a more general system of macroscopic equations is derived here which incorporates the spatiotemporal variation of interfacial energies. These equations are based on the theory of mixtures in macroscopic continuum mechanics. They include wetting phenomena through surface tensions instead of the traditional use of capillary pressure functions. Relative permeabilities can be identified in this approach which exhibit a complex dependence on the state variables. A capillary pressure function can be identified in equilibrium which shows the qualitative saturation dependence known from experiment. In addition the new equations allow to describe the spatiotemporal changes of residual saturations during immiscible displacement.Comment: 15 pages, Phys. Rev. E (1998), in prin

Visible-Light-Active Iodide-Doped BiOBr Coatings for Sustainable Infrastructure

The search for efficient materials for sustainable infrastructure is an urgent challenge toward potential negative emission technologies and the global environmental crisis. Pleasant, efficient sunlight-activated coatings for applications in self-cleaning windows are sought in the glass industry, particularly those produced from scalable technologies. The current work presents visible-light-active iodide-doped BiOBr thin films fabricated using aerosol-assisted chemical vapor deposition. The impact of dopant concentration on the structural, morphological, and optical properties was studied systematically. The photocatalytic properties of the parent materials and as-deposited doped films were evaluated using the smart ink test. An optimized material was identified as containing 2.7 atom % iodide dopant. Insight into the photocatalytic behavior of these coatings was gathered from photoluminescence and photoelectrochemical studies. The optimum photocatalytic performance could be explained from a balance between photon absorption, charge generation, carrier separation, and charge transport properties under 450 nm irradiation. This optimized iodide-doped BiOBr coating is an excellent candidate for the photodegradation of volatile organic pollutants, with potential applications in self-cleaning windows and other surfaces

Broken symmetry and the variation of critical properties in the phase behaviour of supramolecular rhombus tilings

The degree of randomness, or partial order, present in two-dimensional supramolecular arrays of isophthalate tetracarboxylic acids is shown to vary due to subtle chemical changes such as the choice of solvent or small differences in molecular dimensions. This variation may be quantified using an order parameter and reveals a novel phase behaviour including random tiling with varying critical properties as well as ordered phases dominated by either parallel or non-parallel alignment of neighbouring molecules, consistent with long-standing theoretical studies. The balance between order and randomness is driven by small differences in the intermolecular interaction energies, which we show, using numerical simulations, can be related to the measured order parameter. Significant variations occur even when the energy difference is much less than the thermal energy highlighting the delicate balance between entropic and energetic effects in complex self-assembly processes