Influence of regression model and initial intensity of an incremental test on the relationship between the lactate threshold estimated by the maximal-deviation method and running performance     

Jordan Santos-Concejero  Ross Tucker  Cristina Granados  Jon Irazusta  Iraia Bidaurrazaga-Letona  Jon Zabala-Lili 《Journal of sports sciences》2013,31(9):853-859

Abstract

This study investigated the influence of the regression model and initial intensity during an incremental test on the relationship between the lactate threshold estimated by the maximal-deviation method and performance in elite-standard runners. Twenty-three well-trained runners completed a discontinuous incremental running test on a treadmill. Speed started at 9 km · h^?1 and increased by 1.5 km · h^?1 every 4 min until exhaustion, with a minute of recovery for blood collection. Lactate–speed data were fitted by exponential and polynomial models. The lactate threshold was determined for both models, using all the co-ordinates, excluding the first and excluding the first and second points. The exponential lactate threshold was greater than the polynomial equivalent in any co-ordinate condition (P < 0.001). For both models, the lactate threshold was lower when all co-ordinates were used than when the first and the first and second points were excluded (P < 0.001). 10-km race pace was correlated with both the exponential and polynomial lactate thresholds for all the co-ordinate conditions (r ≥ 0.75, P < 0.001 and r ≥ 0.56, P < 0.05, respectively). The results suggest that the exponential lactate threshold should be used instead of the polynomial equivalent since it is more strongly associated with performance and is independent of the initial intensity of the test.  相似文献   

Boy Trouble: Rhetorical framing of boys' underachievement   总被引：1，自引：1，他引：1  

Jordan J. Titus 《Discourse: Studies in the Cultural Politics of Education》2004,25(2):145-169

This article examines discourse in the United States used to socially construct an “underachieving boys” moral panic. Employing discourse analysis I examine the adversarial rhetoric of claims-makers and the frames they deploy to undermine alternative and conflicting accounts (of females as disadvantaged) and to forestall any challenges to the scientific authority of their own (biological essentialist) account of crisis. I illustrate how this discourse adapts the rhetorical frame of gender equity from the discourse it politically opposes, and uses it to legitimate its own goals. I find that the framing of innocent victimized boys as scientific “truth” is aligned with a broader masculinity politics that blames certain “folk devils”, and a synchronic moral panic about fearsome (black) male youth. I conclude by considering the success of this moral panic as evidenced by changes in educational policies and practices in the United States.  相似文献   

彰显独特十法则     

Julie Jordan Scott 《海外英语》2006,(4):37

你认为自己是独一无二的吗？世上每一个人都是独特的,都拥有区别于别人的特点。让我们把自己的独特完全释放,给别人一个完全不同的自己。  相似文献   

A simple microscopy assay to teach the processes of phagocytosis and exocytosis     

Gray R  Gray A  Fite JL  Jordan R  Stark S  Naylor K 《CBE life sciences education》2012,11(2):180-186

Phagocytosis and exocytosis are two cellular processes involving membrane dynamics. While it is easy to understand the purpose of these processes, it can be extremely difficult for students to comprehend the actual mechanisms. As membrane dynamics play a significant role in many cellular processes ranging from cell signaling to cell division to organelle renewal and maintenance, we felt that we needed to do a better job of teaching these types of processes. Thus, we developed a classroom-based protocol to simultaneously study phagocytosis and exocytosis in Tetrahymena pyriformis. In this paper, we present our results demonstrating that our undergraduate classroom experiment delivers results comparable with those acquired in a professional research laboratory. In addition, students performing the experiment do learn the mechanisms of phagocytosis and exocytosis. Finally, we demonstrate a mathematical exercise to help the students apply their data to the cell. Ultimately, this assay sets the stage for future inquiry-based experiments, in which the students develop their own experimental questions and delve deeper into the mechanisms of phagocytosis and exocytosis.  相似文献   

‘We're Going to Make You Popular': Popular Collections in the Modern Academic Law Library     

Jordan A. Jefferson 《Legal Reference Services Quarterly》2013,32(1-2):78-109

One way to promote the relevancy of an academic law library is to create a special collection that generates interest in the patron base; a popular collection is a viable way of reinventing a law library's image in the hearts and minds of the law school community. Popular collections have been championed by general academic librarians because they promote reading and literacy, the use of the library as a place, and such collections represent the shift toward a user focused library model. Using data collected from interviews and analysis of collection development policies this article presents models of popular collections currently in use at academic law libraries, as well as considerations for the creation of such collections.  相似文献   

Teaching thinking: the case for principles     

Rita R. Jordan  Stuart D. Powell 《欧洲特需教育杂志》2013,28(2):112-123

Abstract

This paper reviews the situation with regard to the teaching of thinking skills as part of the taught curriculum. The case is made for direct teaching of cognitive skills both to meet the particular learning difficulties of children with special educational needs and also to enhance the learning and thinking of all children. The dangers of ‘recipe’ approaches to teaching this aspect of the curriculum are discussed and a ‘principles’ approach is advocated. Some principles are then described which may be used to underpin the designing of problem‐solving activities, through which thinking skills can be taught across the curriculum.  相似文献   

Nothing about us without us! Youth-led solutions to improve high school completion rates     

Fred Chou  Janelle Kwee  Robert Lees  Kara Firth  Jordan Florence  Jake Harms 《Educational Action Research》2013,21(3):436-459

This Youth Participatory Action Research (YPAR) study represents a collaboration with six students from alternative education to inquire about the experiences of vulnerable youth – students in alternative education and youth who have dropped out of school. Utilizing the Enhanced Critical Incident Technique, youth researchers asked their peers what helped and hindered their retention and success in mainstream and alternative education. Youth researchers engaged in authentic participation and took part in the iterative phases of YPAR – critical reflection and social action. Their involvement empowered them to advocate for their peers by disseminating the results and recommendations to key stakeholders within the community. Youth researchers conducted semi-structured interviews with 18 participants. Overall, the findings show that relationships with staff and peers, flexibility, psychosocial and academic supports, and personal circumstances are vital in helping vulnerable students succeed in school. Engagement in YPAR provided insight into working with vulnerable youth in a manner that promotes agency and social change within educational institutions.  相似文献   

Early years curriculum: funds of knowledge as a conceptual framework for children’s interests   总被引：1，自引：1，他引：0  

Helen Hedges  Joy Cullen  Barbara Jordan 《课程研究杂志》2013,45(2):185-205

Children’s interests are frequently cited as a source of early‐years curricula. Yet, research has rarely considered the nature of these interests beyond the play‐based environment of early‐childhood education. This paper reports findings from a qualitative, interpretivist study in two early childhood settings in Aotearoa/New Zealand. Using participant observation, interviews, and documentation, the study examined children’s interests and teachers’ engagement with these in curriculum interactions. Evidence suggested children’s interests were stimulated by their ‘intent participation’ in family and community experiences and encapsulated in the notion of ‘funds of knowledge’. The concept of funds of knowledge provides a coherent analytic framework for teachers to recognize children’s interests and extend teachers’ curriculum planning focus beyond that of a child‐centred play‐based learning environment.  相似文献   

Educational psychology and modes of inquiry     

Thomas E. Jordan 《教育心理学家》2013,48(3):32-33

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Publications in Four Gifted Education Journals From 2001 to 2006: An Analysis of Article Types and Authorship Characteristics     

Megan R. Parker  Kelli R. Jordan  Emily R. Kirk  Kathleen B. Aspiranti  Sherry K. Bain 《Roeper Review》2013,35(3):207-216

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