Convergent validity of a novel method for quantifying rowing training loads

Elite rowers complete rowing-specific and non-specific training, incorporating continuous and interval-like efforts spanning the intensity spectrum. However, established training load measures are unsuitable for use in some modes and intensities. Consequently, a new measure known as the T2minute method was created. The method quantifies load as the time spent in a range of training zones (time-in-zone), multiplied by intensity- and mode-specific weighting factors that scale the relative stress of different intensities and modes to the demands of on-water rowing. The purpose of this study was to examine the convergent validity of the T2minute method with Banister’s training impulse (TRIMP), Lucia’s TRIMP and Session-RPE when quantifying elite rowing training. Fourteen elite rowers (12 males, 2 females) were monitored during four weeks of routine training. Unadjusted T2minute loads (using coaches’ estimates of time-in-zone) demonstrated moderate-to-strong correlations with Banister’s TRIMP, Lucia’s TRIMP and Session-RPE (rho: 0.58, 0.55 and 0.42, respectively). Adjusting T2minute loads by using actual time-in-zone data resulted in stronger correlations between the T2minute method and Banister’s TRIMP and Lucia’s TRIMP (rho: 0.85 and 0.81, respectively). The T2minute method is an appropriate in-field measure of elite rowing training loads, particularly when actual time-in-zone values are used to quantify load.     

Teachers' perspectives on competency-based testing

The study described in this article was designed to gather information about teachers' perspectives on achievement testing and to describe where the competency-based testing in Continuous Uniform Evaluation Systems (CUES) programs fits into teachers' overall plans for teaching and assessing students.The specific objectives of the research were (1) to develop a taxonomy of techniques that teachers use to assess students, (2) to describe teachers' uses and perceptions of various assessment techniques, and (3) to describe the implementation of various assessment activities in natural classroom settings. The results of the study have implications for the design and implementation of instructional systems in school settings.     

Isolation and manipulation of living adherent cells by micromolded magnetic rafts

A new strategy for magnetically manipulating and isolating adherent cells with extremely high post-collection purity and viability is reported. Micromolded magnetic elements (termed microrafts) were fabricated in an array format and used as culture surfaces and carriers for living, adherent cells. A poly(styrene-co-acrylic acid) polymer containing well dispersed magnetic nanoparticles was developed for creating the microstructures by molding. Nanoparticles of γFe(2)O(3) at concentrations up to 1% wt.∕wt. could be used to fabricate microrafts that were optically transparent, highly magnetic, biocompatible, and minimally fluorescent. To prevent cellular uptake of nanoparticles from the magnetic polymer, a poly(styrene-co-acrylic acid) layer lacking γFe(2)O(3) nanoparticles was placed over the initial magnetic microraft layer to prevent cellular uptake of the γFe(2)O(3) during culture. The microraft surface geometry and physical properties were altered by varying the polymer concentration or layering different polymers during fabrication. Cells plated on the magnetic microrafts were visualized using standard imaging techniques including brightfield, epifluorescence, and confocal microscopy. Magnetic microrafts possessing cells of interest were dislodged from the array and efficiently collected with an external magnet. To demonstrate the feasibility of cell isolation using the magnetic microrafts, a mixed population of wild-type cells and cells stably transfected with a fluorescent protein was plated onto an array. Microrafts possessing single, fluorescent cells were released from the array and magnetically collected. A post-sorting single-cell cloning rate of 92% and a purity of 100% were attained.     

New Media/Internet Research Topics of the Association of Internet Researchers

This study summarizes prior reviews of new media and Internet research, and the growth of the term Internet in academic publications and online newsgroups. It then uses semantic network analysis to summarize the interests and concepts of an interdisciplinary group of Internet researchers, as represented by session titles and paper titles and abstracts from the 2003 and 2004 Association of Internet Researchers conferences. In both years, the most frequent words appearing in the paper abstracts included Internet, online, community, social, technology, and research. The 2003 papers emphasized topics such as the social analysis/research of online/Internet communication, community, and information, with particular coverage of access, individuals, groups, digital media, culture; role and process in e-organizations; and world development. The 2004 papers emphasized topics such as access; news and social issues; the role of individuals in communities; user-based studies; usage data; and blogs, women, and search policy, among others.     

Strategies for Effecting Strategic Organisational Change in Teaching Practices: Case Studies at Deakin University

The vision of Deakin University is, in part, to be recognized as a world leader in flexible and lifelong professional learning and in the innovative and timely applications of information and communications technologies to teaching and learning. This paper describes aspects of the university's Online Teaching, Learning and Enhancement Project, which sought to bring about faculty change by adopting a combination of institutionally imposed and faculty-driven strategies to expand the use of information and communications technologies in programs across the university. In particular, the paper describes and analyzes the models of change underpinning the project, discusses the ways in which the adoption of information and communications technologies for teaching and learning were used as a mechanism to effect and encourage desired change, contrasts the approaches used to implement the project in three faculties, and identifies several key pedagogical and administrative outcomes of the project. Finally, the paper draws some tentative conclusions regarding critical success factors for the adoption of technology-based teaching and learning in higher education.     

The impact of high-stakes testing on curriculum and pedagogy: a teacher perspective from Australia

Debates continue about how high-stakes testing regimes influence schools at all levels: their impact on teaching practices, distribution of resources and curriculum provision, and whether they achieve the intended increases in student achievement in targeted areas. In 2008, the Australian government introduced a national testing scheme, the National Assessment Program – Literacy and Numeracy (NAPLAN), in which all Australian students in Years 3, 5, 7 and 9 are required to participate, and a national website, MySchool, was established in 2010 to publish the results of all schools. This paper reports on the first national study of educators’ views on the impact of NAPLAN on Australian schools and students. Over 8000 educators from all states and territories participated in the study, and the findings indicate that the testing regime is leading to a reduction in time spent on other curriculum areas and adjustment of pedagogical practice and curriculum content to mirror the tests. The findings suggest that the modification of teaching and curricular practices is in response to concerns regarding the use and reporting of NAPLAN data and the potential impact on schools. This confirms findings of researchers in other countries on the capacity of high-stakes regimes to distort teaching practices, constrain the curriculum and narrow students’ educational experiences.     

The effect of block scheduling high school mathematics courses on student achievement and teachers' use of time: implications for educational productivity

Block scheduling involves the reallocation of instructional time into longer class sessions to encourage more active teaching strategies, reduce fragmentation inherent in single-period schedules, and improve student performance. To the degree that such policies reallocate existing resources to realize higher levels of desired educational outcomes, the goal of productivity can be served. Despite widespread experimentation with various forms of block scheduling, there is conflicting evidence on the impact of these innovations on student achievement, and little evidence of their effect on classroom practice. This study explores these relationships. More specifically, the study draws on data from the National Education Longitudinal Study: 1988 to estimate the impact of block-scheduled mathematics courses on tenth-grade student achievement and teachers' use of class time. Findings suggest that while block scheduling is positively associated with teachers' use of multiple instructional methods and more individualized instruction, this scheduling reform has a negative impact on students' tenth-grade mathematics scores, controlling for other factors. Implications for educational productivity are discussed.