Iron balance and iron supplementation for the female athlete: A practical approach     

Charles R Pedlar  Carlo Brugnara  Georgie Bruinvels  Richard Burden 《European Journal of Sport Science》2018,18(2):295-305

Maintaining a positive iron balance is essential for female athletes to avoid the effects of iron deficiency and anaemia and to maintain or improve performance. A major function of iron is in the production of the oxygen and carbon dioxide carrying molecule, haemoglobin, via erythropoiesis. Iron balance is under the control of a number of factors including the peptide hormone hepcidin, dietary iron intake and absorption, environmental stressors (e.g. altitude), exercise, menstrual blood loss and genetics. Menstruating females, particularly those with heavy menstrual bleeding are at an elevated risk of iron deficiency. Haemoglobin concentration [Hb] and serum ferritin (sFer) are traditionally used to identify iron deficiency, however, in isolation these may have limited value in athletes due to: (1) the effects of fluctuations in plasma volume in response to training or the environment on [Hb], (2) the influence of inflammation on sFer and (3) the absence of sport, gender and individually specific normative data. A more detailed and longitudinal examination of haematology, menstrual cycle pattern, biochemistry, exercise physiology, environmental factors and training load can offer a superior characterisation of iron status and help to direct appropriate interventions that will avoid iron deficiency or iron overload. Supplementation is often required in iron deficiency; however, nutritional strategies to increase iron intake, rest and descent from altitude can also be effective and will help to prevent future iron deficient episodes. In severe cases or where there is a time-critical need, such as major championships, iron injections may be appropriate.  相似文献   

Are Hirst and Peters Liberal Philosophers of Education?     

Penny Enslin 《Journal of Philosophy of Education》1985,19(2):211-222

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Advanced revelation     

Jocelyn Penny Small 《Archives and Museum Informatics》1988,2(1):2-5

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Where do journalists go after newsroom job cuts?     

Penny O'Donnell 《Journalism Practice》2016,10(1):35-51

This article explores the aftermath of job loss in journalism in 2012, a year of dramatic press industry restructuring in Australia. It reports the findings of a pilot survey of 95 Australian redundant journalists, undertaken as part of the New Beats project, a five-year, university–industry investigation of what happens to journalists, and journalism, after job loss. Three related questions drive the analysis: Where do journalists go after job cuts? How do they make sense of job loss? What happens to professional identity? In contrast to a recent study of journalists laid off from the British press, and the literature on the aftermath of job loss for older professionals, this research finds that, in practical terms, the Australian journalists had relatively better than expected post-job loss experiences. All but two of the redundant journalists seeking re-employment found some form of work within one year, and, thanks to union-enforced redundancy agreements, most left newsrooms with severance payments that cushioned the financial impact of unemployment. Yet, the majority did not resume their full-time careers in journalism, and many were emotionally traumatised not only by job loss but also career change. The article argues a sense of leaving a newspaper industry in seemingly terminal decline amplified feelings of anger and anxiety about both the future of journalism work, and lost professional identity, prompting many to leave the profession intentionally and seek jobs elsewhere.  相似文献   

Towards a collaborative methodology: An ethnography of widening educational participation     

Penny Jane Burke 《The Australian Educational Researcher》2002,29(1):115-136

This paper examines my attempts to develop a collaborative methodology, and critically considers the limitations and possibilities of this approach. It draws on a small-scale ethnography of widening educational participation undertaken for my doctoral degree. I worked with a group of access students in a UK further education college to develop the methods and methodology, to identify research questions and key areas of focus and, to a lesser extent, to analyse the data. Post/structural analytical tools enabled co-participants to deconstruct hegemonic neo-liberal discourses of widening participation. Feminist theory enabled the refashioning of radical discourses that are concerned with destabilising unequal relations of power in research and in education. In the paper I consider issues of power, research relationships, author-ity, reflexivity and ethics in collaborative methodology.  相似文献   

Re/conceptualising time and temporality: an exploration of time in higher education     

Anna Bennett  Penny Jane Burke 《Discourse: Studies in the Cultural Politics of Education》2018,39(6):913-925

ABSTRACT

In this paper we deconstruct hegemonic conceptions of time in higher education. Drawing on a recent project, we argue that limiting assumptions about time dominate notions of student capability and prospects of success. The paper reveals how the conceptualisation of time is constituted within a framework that individualises and decontextualises difficulties. Within this frame, socio-cultural elitism is left largely unchallenged, with many students left out and misrecognised as purely lacking capability and commitment. Rethinking simple distinctions between ‘time’ and ‘temporality’, we consider ways to broaden understandings to enable a more inclusive and ‘inventive’ system. We apply a Foucauldian analysis to argue that we co-construct the future in the very ways that we react to the present and think about the past. We must recognise that the way we work in the present is how we create the future. Our everyday actions, assumptions and reactions re/produce our futures.  相似文献   

Understanding student engagement with research: a study of pre-service teachers’ research perceptions,research experience,and motivation     

Daniel Guilbert  Rod Lane  Penny Van Bergen 《Asia-Pacific Journal of Teacher Education》2016,44(2):172-187

This study reports on findings from a research project that investigated the extent to which pre-service teachers at a major metropolitan Australian university engage with research, and the factors that influence their level of engagement or disengagement. Results from survey responses (n = 235) and focus group interviews suggest that attitudes towards research are more positive among pre-service teachers who possess research experience and those who are intrinsically motivated with respect to their university studies. The article discusses the implications of these results for the effective organisation and promotion of research activities for pre-service teachers.  相似文献   

VI. Implications for Research, Policy, and Practice     

Penny Hauser-Cram  Marji Erickson Warfield  Jack P. Shonkoff  & Marty Wyngaarden Krauss 《Monographs of the Society for Research in Child Development》2001,66(3):94-101

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Vocabulary,Context, and Speech Perception Among Good and Poor Readers     

Penny Chiappe  Dan L. Chiappe  Alexandra Gottardo 《教育心理学》2004,24(6):825-843

This study examined the interaction between speech perception and sentential context among 13 poor readers and 49 good readers in grades one to three. Children's performance was examined on tasks assessing expressive and receptive vocabulary, reading skill, phonological awareness, pseudoword repetition, and phoneme identification. Good readers showed clearly defined categorical perception in the phoneme identification task for both sentence frames biased to the identification of the /b/ or /p/ phoneme. The /b/–/p/ category boundary for the BATH frame was at longer voice onset times (VOTs) than the boundary for PATH frame. Poor readers showed less sharply defined categorical perception with both sentence frames. Although poor readers did not show a shift in the /b/–/p/ category boundary, sentential context did affect the overall rate with which phonemes were identified as /b/ or /p/ at each VOT. These findings suggest that semantic information may operate as a compensatory mechanism for resolving ambiguities in speech perception. Furthermore, expressive vocabulary was more closely related than receptive vocabulary to individual differences in reading and phonological processing, providing support for the phonological distinctness hypothesis.  相似文献   

#2: Freedom of Movement throughout Labor          下载免费PDF全文

Shilling T  Difranco J  Simkin P 《The Journal of perinatal education》2004,13(2):11-15

In this position paper-one of six care practice papers published by Lamaze International and reprinted here with permission-the benefit of allowing freedom of movement throughout labor is discussed and presented as an evidence-based practice that helps promote, protect, and support normal birth. The paper is written for childbearing women and their families. The accompanying commentary-written by a well-known author of numerous articles and books on childbirth-compares the activities of women in two birthing environments: the conventional medicalized setting and the unconventional naturalistic setting. Reasons why women may not move in labor are presented. Lamaze International encourages women to use movement in labor in order to make labor more comfortable and more efficient.  相似文献