Recovery of pulmonary diffusing capacity after maximal exercise     

Jess Rasmussen  Birgitte Hanel  Kari Saunamaki  Niels H. Secher 《Journal of sports sciences》2013,31(6):525-531

Abstract

Pulmonary diffusing capacity (Dl_co), together with spirometric variables, arterial oxygen tension (paO₂) and cardiac output were determined before and at intervals after maximal arm cranking, treadmill running and erogmeter rowing. Independent of the type of exercise, Dl_co increased immediately post‐exercise from a median 13.6 (range 7.3–16.3) to 15.1 (9.3–19.6) mmol min^‐1 kPa^‐1 (P <0.01). However, it decreased to 11.6 (6.9–15.5) mmol min^‐1 kPa^‐1 (P <0.01) after 24 h with cardiac output and paO₂ at resting values, and Dl_co normalized after 20 h. Thoracic electrical impedance at 2.5 and 100 kHz increased slightly post‐exercise, indicating a decrease in thoracic fluid balance, and there were no echocardiographic signs of left ventricular failure at the time of the decrease in Dl_co. Also, active muscle (limb) circumference and volume, and an increase in haematocrit from 43.8 (38.0–47.0) to 47.1 (42.7–49.8) (P <0.01), had normalized at the time of the decrease in Dl_co. Vital capacity, forced vital capacity, forced expiratory volume in 1 s, peak and peak mid‐expiratory flows did not change. However, total lung capacity increased from 6.8 (5.0–7.6) to 7.0 (5.1–7.8) litres (P <0.05) immediately after exercise and remained elevated at 6.9 (5.1–8.7) litres (P <0.05) when a decrease in Dl_co was noted. The results demonstrate that independent of the type of maximal exercise, an approximate 15% reduction in Dl_co takes place 2–3 h post‐exercise, which normalizes during the following day of recovery.  相似文献   

Case analysis of capability deployment in crisis prevention and response     

Ta-Kai Yang  Ming-Huei HsiehAuthor Vitae 《International Journal of Information Management》2013

The topic of effective crisis prevention and response is attracting significant interests from corporations and governments. It is evident that the nature within any crisis is unpredictable, erratic and difficult to prevent. Organizations are therefore preparing for unexpected events by outlining their crisis response strategies. The fact that crises may not repeat themselves and a given crisis solution might not be directly applicable to another crisis represents radical shifts in routines. As such, an organization may have to improvise when putting together a set of resources and capabilities for a response. This case study complements existing crisis management research that emphasizes both prevention and response by focusing on how an organization may adapt and deploy resources and capabilities accordingly. To meet the objective, the research draws upon an in-depth case study of Singapore's response tothe Asian Tsunami disaster in 2004. Our findings offer a useful contribution to organizations’ knowledge of mobilizing resources and capabilities during dynamic crisis situations. The case concludes with several research and practical implications.  相似文献   

Training effects on contrafreeloading in rats housed in operant chambers     

Robert D. Tarte  Charles T. Rasmussen 《Learning & behavior》1979,7(1):69-74

Four rats were trained to press a bar for food pellets and then were housed in operant chambers for 6 continuous days of choice-testing between obtaining pellets freely or by barpressing. There were two additional 3-day choice periods following more barpress training. It was found that (1) animals preferred to secure food by barpressing when initially placed in the choice situation and immediately following additional barpress training; (2) there was a subsequent decrease to very low levels of response-dependent food taken during choice testing; and (3) opening the chambers for daily maintenance during choice-testing caused a temporary increase in barpressing for food. Thus the previously reported stability of high rates of barpressing in the presence of free food is, at least in part, dependent upon short testing sessions.  相似文献   

Border work: Teachers’ expressions of their literacy-related professional development needs in a First Nations school     

Rachel Heydon^{Author Vitae}  Rosamund StookeAuthor Vitae 《Teaching and Teacher Education》2012,28(1):11-20

This paper reports on a case study of teachers’ expressions of their literacy-related professional development needs in a First Nations school located in Ontario, Canada. The paper construes the work of the teachers as “border work” and argues that their literacy teaching work was complex and tied to an ongoing legacy of colonialism. Four interrelated themes are discussed. The paper recommends improving compensation and job security for educators in First Nations schools and supporting them to see themselves as knowledgeable professionals who can entertain sophisticated notions of literacy that consider its relationship to situation including culture.  相似文献   

Differentiated instruction in small schools     

Robbert Smit  Winfried HumpertAuthor Vitae 《Teaching and Teacher Education》2012

Rural areas in the alpine regions suffer from dwindling student numbers. Differentiated instruction (DI) could help improve the teaching culture by allowing instructors to better adapt to heterogeneous student groups. At the beginning of a combined research and school improvement project, a survey of 162 teachers and 1180 students was conducted to obtain an overview of the types of DI that are currently practiced. In addition, we examined the school conditions that supported the implementation of DI. This cross-sectional study demonstrates a difference in practices between teachers with more- and less-developed DI cultures, and it was determined that team collaboration that includes pedagogical topics enhances teachers' use of DI.  相似文献   

e-GovQual: A multiple-item scale for assessing e-government service quality   总被引：1，自引：0，他引：1  

Xenia Papadomichelaki^{Author Vitae}  Gregoris Mentzas^{Author Vitae} 《Government Information Quarterly》2012,29(1):98-109

A critical element in the evolution of governmental services through the internet is the development of sites that better serve the citizens' needs. To deliver superior service quality, we must first understand how citizens perceive and evaluate online. Citizen assessment is built on defining quality, identifying underlying dimensions, and conceptualizing measurements of these e-government services. In this article an e-gov service quality model (e-GovQual) is conceptualized and then a multiple-item scale for measuring e-gov service quality of governmental sites where citizens seek either information or service, is developed, refined, validated confirmed and tested.  相似文献   

Gender and digital divide 2000-2008 in two low-income economies in Sub-Saharan Africa: Kenya and Somalia in official statistics     

Inger Brännström Author Vitae 《Government Information Quarterly》2012,29(1):60-67

The Beijing World Conference on Women held in 1995 by the United Nations member states, approved strategies for improving women's access to and use of new communication technologies. The aim of this paper is to retrieve official statistics for the years 2000-2008 with regard to sex differences, gender and digital divide (specifically concerning telecommunication technologies) in two low-income economies in Sub-Saharan Africa, Kenya and Somalia. This paper reveals that official statistics on sex discrepancies and, the gender divide regarding access, use and benefits of telecommunications are still almost totally lacking for the countries in view. However, the digital divide is successively closing, and the telecommunication process in Kenya was quite rapid at the end of the period. Official statistics from Somalia are difficult to comprehend due to the absence of official data and a lack of evidence-based knowledge. Fifteen years after the Beijing Conference in 1995 there is still a lack of comprehensive statistics regarding new communication technologies for low-income economies such as Kenya and Somalia.  相似文献   

Using Food Science Demonstrations to Engage Students of All Ages in Science,Technology, Engineering,and Mathematics (STEM)     

Shelly J. Schmidt  Dawn M. Bohn  Aaron J. Rasmussen  Elizabeth A. Sutherland 《Journal of Food Science Education》2012,11(2):16-22

Abstract: The overarching goal of the Science, Technology, Engineering, and Mathematics (STEM) Education Initiative is to foster effective STEM teaching and learning throughout the educational system at the local, state, and national levels, thereby producing science literate citizens and a capable STEM workforce. To contribute to achieving this goal, we have assembled six food science demonstrations for use at all educational levels and have presented these lessons to students at the elementary through higher education levels. The focus of this article is to share these food science demonstrations and our experiences using them so that others can use them for engaging students in STEM disciplines, through food science, at any educational level. Featured demonstrations include: (1) liquid nitrogen ice cream: a matter of changing phases, (2) seeing our senses work together, (3) whipping up the cream, (4) milk versus dark: what is the difference?, (5) counting calories by burning them, and (6) culinary spherification: the wonders of cross‐linking. Overall, our experience with using these demonstrations has been very positive. Students appear engaged in the learning process and love to consume the demonstration end products. Downloadable handouts containing demonstration details for each demonstration are available as supporting information.  相似文献   

Lifelong learning policy in two national contexts     

Palle Rasmussen 《International Journal of Lifelong Education》2014,33(3):326-342

This article describes and discusses the development of lifelong learning policy in two EU member states, Denmark and Portugal. The purpose is to show how different societal and historical contexts shape the development and implementation of lifelong learning policies, even though these policies have significant common elements. As a basis for the discussion an inventory of policy elements is presented. Denmark and Portugal have been chosen as examples of smaller EU member states with different historical, social and cultural characteristics. Developments and policies in the two countries, including the links with EU education policy, are described. The discussion includes comparison drawing on the inventory of policy elements. A main conclusion is that the different historical trajectories of the two countries remain very important for present-day education and for the advancement of lifelong learning policy. Early development of public primary education and popular adult education has provided a strong foundation for lifelong learning policy in Denmark while in Portugal not only institutional provision but also popular demand for lifelong learning has had to be built up relatively recently. EU education policy has had much more impact on lifelong learning policy in Portugal than in Denmark, because Portugal has had to depend much more on economic support from the EU social fund.  相似文献   

Theory talk in the library science scholarly literature: An exploratory analysis     

Kafi D. Kumasi  Deborah H. CharbonneauAuthor VitaeDian WalsterAuthor Vitae 《Library & information science research》2013

In the discipline of library and information science (LIS), a qualitative analysis of the meaningful use of theory in contemporary scholarly literature is critical to helping scholars expand their repertoire of knowledge about various theories and helping them make informed decisions about how to skillfully integrate theory in their research. This study explored how theory was presented and talked about in seven prominent library science-focused journals from 2009 to 2011. Through a process of analytic induction, categories representing a continuum of theory talk were identified and their relationships examined. Three main types of theory talk in library research are defined, ranging from minimal (theory dropping), moderate (theory conversation), to major (theory generation). The categories and their relationships generate a rich discussion about the intensity and degree to which theory is being discussed and used in a less-examined subset of library and information science research journals. This research contributes both an explanatory structure and substantive discussion regarding theory use in library science to the professional literature.  相似文献