The oxygen-conserving potential of the diving response: A kinetic-based analysis     

Guillaume Costalat  Jeremy Coquart  Ingrid Castres  Fabrice Joulia  Olivier Sirost  Eric Clua 《Journal of sports sciences》2017,35(7):678-687

We investigated the oxygen-conserving potential of the human diving response by comparing trained breath-hold divers (BHDs) to non-divers (NDs) during simulated dynamic breath-holding (BH). Changes in haemodynamics [heart rate (HR), stroke volume (SV), cardiac output (CO)] and peripheral muscle oxygenation [oxyhaemoglobin ([HbO₂]), deoxyhaemoglobin ([HHb]), total haemoglobin ([tHb]), tissue saturation index (TSI)] and peripheral oxygen saturation (SpO₂) were continuously recorded during simulated dynamic BH. BHDs showed a breaking point in HR kinetics at mid-BH immediately preceding a more pronounced drop in HR (?0.86 bpm.%^?1) while HR kinetics in NDs steadily decreased throughout BH (?0.47 bpm.%^?1). By contrast, SV remained unchanged during BH in both groups (all P > 0.05). Near-infrared spectroscopy (NIRS) results (mean ± SD) expressed as percentage changes from the initial values showed a lower [HHb] increase for BHDs than for NDs at the cessation of BH (+24.0 ± 10.1 vs. +39.2 ± 9.6%, respectively; P < 0.05). As a result, BHDs showed a [tHb] drop that NDs did not at the end of BH (?7.3 ± 3.2 vs. ?3.0 ± 4.7%, respectively; P < 0.05). The most striking finding of the present study was that BHDs presented an increase in oxygen-conserving efficiency due to substantial shifts in both cardiac and peripheral haemodynamics during simulated BH. In addition, the kinetic-based approach we used provides further credence to the concept of an “oxygen-conserving breaking point” in the human diving response.  相似文献   

An exploration of hispanic mothers' culturally sustaining experiences at an informal science center     

Ingrid Weiland 《科学教学研究杂志》2015,52(1):84-106

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Preservice Biology Teachers’ Professional Knowledge: Structure and Learning Opportunities     

Jörg Großschedl  Ute Harms  Thilo Kleickmann  Ingrid Glowinski 《Journal of Science Teacher Education》2015,26(3):291-318

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Creating Citizens     

Ingrid Jönsson 《International Studies in Sociology of Education》2013,23(2):185-198

ABSTRACT

This paper explores the content of citizenship education in Swedish schools during the twentieth century. Its origin and content is analysed in relation to predominant ideas in society at different times and is seen as the outcome of a struggle between social forces representing different power groups. The shift of meaning of democracy and equality is related to changes in political and economic conditions. Recent trends and changes in the Swedish educational system are discussed in relation to changing power groups in society and considerations made for the implications of citizenships, democracy and equality.  相似文献   

Parental influence in educational decisions: young people’s perspectives     

Kristinn Hegna  Ingrid Smette 《British Journal of Sociology of Education》2017,38(8):1111-1124

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Stichwort: Entwicklung sprachlicher Fähigkeiten von Kindern und Jugendlichen im Bildungskontext     

Prof. Dr. Dr. h.c. Ingrid Gogolin 《Zeitschrift für Erziehungswissenschaft》2014,17(3):407-431

This article contains a review of recent research on the topic of language development in an educational research perspective. The contribution is focussed on research which was carried out in the German education system. The starting point of such research was the insight that mastery of a language is of core importance for educational success as well as for participation in a society. The research which is presented in this review article strives to identify factors that are relevant for the development of different language abilities during an education biography. The article starts with an overview of international and national research traditions which build the ground for the investigation of language development in an educational research perspective. A second part of the article deals with research projects that aimed to unveil factors which are influential for differential language development during a school career. In the third part of the article, an outlook on recent research is presented which deals with the question how language development can be fostered and supported by educational institutions. In Germany, such projects are just beginning. They mainly derive from the evaluation of model projects or other practical experiments; only very few experimental intervention studies have been carried out.  相似文献   

Developing an audiovisual notebook as a self‐learning tool in histology: Perceptions of teachers and students          下载免费PDF全文

Antonio Campos‐Sánchez  Juan‐Antonio López‐Núñez  Giuseppe Scionti  Ingrid Garzón  Miguel González‐Andrades  Miguel Alaminos  Tomás Sola 《Anatomical sciences education》2014,7(3):209-218

Videos can be used as didactic tools for self‐learning under several circumstances, including those cases in which students are responsible for the development of this resource as an audiovisual notebook. We compared students' and teachers' perceptions regarding the main features that an audiovisual notebook should include. Four questionnaires with items about information, images, text and music, and filmmaking were used to investigate students' (n = 115) and teachers' perceptions (n = 28) regarding the development of a video focused on a histological technique. The results show that both students and teachers significantly prioritize informative components, images and filmmaking more than text and music. The scores were significantly higher for teachers than for students for all four components analyzed. The highest scores were given to items related to practical and medically oriented elements, and the lowest values were given to theoretical and complementary elements. For most items, there were no differences between genders. A strong positive correlation was found between the scores given to each item by teachers and students. These results show that both students' and teachers' perceptions tend to coincide for most items, and suggest that audiovisual notebooks developed by students would emphasize the same items as those perceived by teachers to be the most relevant. Further, these findings suggest that the use of video as an audiovisual learning notebook would not only preserve the curricular objectives but would also offer the advantages of self‐learning processes. Anat Sci Educ 7: 209–218. © 2013 American Association of Anatomists.  相似文献   

Making sound decisions: A framework for judging the worth of your data     

Ingrid Guerra‐Lpez  Mary Norris Thomas 《Performance Improvement》2011,50(5):37-44

In our daily lives, we encounter decision points on a continuous basis. To maximize the likelihood of successful decisions, organizational members must draw on relevant, reliable, valid, and complete data. Sometimes copious data are available, but an overabundance can make it difficult to judge the worth of the data. This article presents a data evaluation framework that provides guidance for decision makers to evaluate and determine the potential effectiveness of the data they will use to inform their decisions.  相似文献   

Impact on student teachers' conception of learning and teaching from studying a course in educational psychology     

Edgar Krull  Ingrid Koni  Kaja Oras 《Asia-Pacific Journal of Teacher Education》2013,41(2):218-231

This study investigates changes in the conceptions of learning and teaching among undergraduate student teachers. A qualitative content analysis of essays using metaphors to describe learning and teaching written by 256 students at the beginning and end of an educational psychology course was used as the main research procedure. It was found that there was an increase in the share of students that see learning and teaching from a cognitive-constructivist perspective and a decrease in the share that see learning and teaching from a behaviourist perspective by the end of the course. In addition, the study revealed that the coherence in the nature of the metaphors describing learning and teaching increased by the end of the course. However, there was practically no increase in the number of essays describing learning from a socio-constructivist perspective, a fact that points to a need to pay more attention to the manifestations of learning in different communities of students, that is, to a relevant knowledge that teachers need in their everyday work.  相似文献   

The Integration of Environmental Education into Two Elementary Preservice Science Methods Courses: A Content-Based and a Method-Based Approach     

Ingrid S. Weiland  Judith A. Morrison 《Journal of Science Teacher Education》2013,24(6):1023-1047

To examine the notion of environmental education (EE) as context for integrating the elementary curricula, we engaged in a multi-case study analysis (Yin 2009) of two preservice elementary science methods courses that utilized an experiential reflective approach—case one (University A) through a science content focus (i.e., sustainability) and case two (University B) through a method focus (i.e., problem-based learning). We examined preservice teachers’ understandings of EE, their ideas to incorporate EE into their future teaching, and their conceptions of EE as a context for integration. Results indicate that both foci (content and method) were successful in building EE content, helping preservice teachers to envision EE in their future classrooms, and promoting EE as a context for integrating their instruction. Based on these results, we offer recommendations for the incorporation of EE as a context for integration into the elementary science methods course.  相似文献