Radiant Flux Through Apertures— II

Equations for the radiant flux through apertures are well-known. But the exact equations are cumbersome and give little direct insight into the behavior of aperture systems. The present paper considers simple approximate equations for rectangular apertures in parallel planes and in perpendicular planes. It extends the previous work (square apertures) to the general case of rectangular apertures.     

Physical,physiological, and technical demands of national netball umpires at different competition levels

ABSTRACT

To compare demands of national netball umpires between levels of competition, 22 Netball New Zealand high-performance umpires participated in this investigation. These included from highest to lowest standard: 9 × semi-professional ANZ Championships (ANZC); 6 × National A Squad (NZA); and 7 × National Development Squad (DEV). Physical (global positioning system tri-axial accelerometry), physiological (heart rate) and technical (video analysis) demands were determined for 48 (16 per group) umpire match performances. Level of competition had no significant effect on physical or mean physiological demands. However, ANZC umpires spent a lower proportion of time at low heart rates compared to DEV, and a greater proportion of time at high, rather than moderate, heart rates compared to NZA. Compared to lower standard umpires, ANZC spent lesser proportions of time standing but greater proportions of time walking backwards and sideways, and turning to change direction. Furthermore, ANZC umpires spent lower proportions of time jogging, but greater proportions of time sprinting compared to DEV. Finally, ANZC umpires spent longer mean durations than DEV on the goal third side line. As such, the difference in demands experienced by national netball umpires between levels of competition is more technical than physical or physiological.     

Benchmarks Curricular Planning and Assessment Framework: Utilizing Standards Without Introducing Standardization

The national early learning community faces the challenge of using early learning standards and assessments to improve learning environments while preserving educators’ freedom to plan early childhood curriculum that accord with a child-centered focus and developmentally appropriate practices. Drawing on recent developments in approaches to undergraduate assessment, this article introduces an approach to curricular planning and assessment that uses state benchmarks as an umbrella structure to support curricular planning, assessment, and feedback among them. The benchmarks have a hierarchical structure that allows educators to think about benchmarks as embedded within educational goals, spanning different age-ranges, and involving activity across multiple domains of child development. The framework prompts educators to identify benchmarks for particular activities and to assess the age-appropriateness of activities and the degree to which they incorporate multiple domains of development. There are two primary curricular measures: (1) the match measure between educator predictions and observed activity, which provides timely feedback about the accuracy of educator predictions for different age-groups and across developmental domains, and (2) an open-ended measure, which provides information about the ways the children surprised educators by using the activity in an unpredicted manner. Both of these measures inform the development of classroom activities and curriculum. This article reports on the pilot implementation of this approach within an early learning program.     

The managers guide to understanding,detecting, and thwarting computer crime: An international performance issue

Cyber crime poses an ever‐growing international threat to businesses. Organizations need to address this threat through a performance intervention by making managers aware of the reasons cyber crimes are committed so that they can detect and prevent them. This research details the primary types of cyber crime, describes and suggests managerial defenses to cyber crime, and reviews the importance of synchronized international legislation in the fight against cyber crime.     

Evaluating phonological processing skills in children with prelingual deafness who use cochlear implants

This study investigated the phonological processing skills of 29 children with prelingual, profound hearing loss with 4 years of cochlear implant experience. Results were group matched with regard to word-reading ability and mother's educational level with the performance of 29 hearing children. Results revealed that it is possible to obtain a valid measure of phonological processing (PP) skills in children using CIs. They could complete rhyming tasks and were able to complete sound-based tasks using standard test materials provided by a commercial test distributor. The CI children completed tasks measuring PP, but there were performance differences between the CI users and the hearing children. The process of learning phonological awareness (PA) for the children with CIs was characterized by a longer, more protracted learning phase than their counterparts with hearing. Tests of phonological memory skills indicated that when the tasks were controlled for presentation method and response modality, there were no differences between the performance of children with CIs and their counterparts with hearing. Tests of rapid naming revealed that there were no differences between rapid letter and number naming between the two groups. Results yielded a possible PP test battery for children with CI experience.     

Active Learning and Student-centered Pedagogy Improve Student Attitudes and Performance in Introductory Biology

We describe the development and implementation of an instructional design that focused on bringing multiple forms of active learning and student-centered pedagogies to a one-semester, undergraduate introductory biology course for both majors and nonmajors. Our course redesign consisted of three major elements: 1) reordering the presentation of the course content in an attempt to teach specific content within the context of broad conceptual themes, 2) incorporating active and problem-based learning into every lecture, and 3) adopting strategies to create a more student-centered learning environment. Assessment of our instructional design consisted of a student survey and comparison of final exam performance across 3 years—1 year before our course redesign was implemented (2006) and during two successive years of implementation (2007 and 2008). The course restructuring led to significant improvement of self-reported student engagement and satisfaction and increased academic performance. We discuss the successes and ongoing challenges of our course restructuring and consider issues relevant to institutional change.     

Body Politics: Coverage of Health Topics and Policy in U.S. Feminist Magazines

This study considered health coverage in 3 highly circulated U.S. feminist magazines: Ms., Bitch, and Bust. The authors used critical discourse analysis to examine 80 print and online articles for representations of liberal, social, radical, and postfeminist feminist ideologies in health coverage; the rhetorical strategies publications used for health content and how they compare with mainstream women’s magazines; and their emphasis on health policy and public health initiatives. The findings suggested that the magazines relied on discursive approaches resembling those of mainstream magazines when covering health, such as prioritizing personal health issues and individualized responses. However, through distinctive feminist lenses, they also performed better than mainstream women’s magazines in presenting health issues, representing a broader range of concerns affecting women, addressing people from diverse communities, and suggesting opportunities for collective response.