By the Stream     

Roderick Hunt  Alex Brychta 《英语大王(小学)》2013,(5):36-38

  相似文献   

Association between knee-to-hip flexion ratio during single-leg vertical landings,and strength and range of motion in professional soccer players     

Gustavo Leporace  Marcio Tannure  Gabriel Zeitoune  Leonardo Metsavaht  Moacir Marocolo  Alex Souto Maior 《Sports biomechanics / International Society of Biomechanics in Sports》2020,19(3):411-420

Abstract

The aim of this study was to test the correlation between knee-to-hip flexion ratio during a single leg landing task and hip and knee strength, and ankle range of motion. Twenty-four male participants from a professional soccer team performed a continuous single leg jump-landing test during 10s, while lower limb kinematics data were collected using a motion analysis system. After biomechanical testing, maximal isometric hip (abduction, extension, external rotation), knee extension and flexion strength were measured. Maximum ankle dorsiflexion range of motion was assessed statically using the weight bearing lunge test. Pearson correlation coefficients were calculated to determine the associations between the predictor variables (knee and hip strength, and ankle ROM) and the main outcome measure (knee-to-hip flexion ratio). Correlation between knee-to-hip flexion ratio and hip abductors strength was significant (r = ?0.47; p = 0.019). No other significant correlations were observed among the variables (p > 0.05). These results demonstrated that a lower hip abductors strength in male soccer players was correlated with a high knee-to-hip flexion ratio during landing from a single leg jump, potentially increasing knee overload by decreasing energy absorption at the hip. The results provide a novel proposal for the functioning of hip muscles to control knee overload.  相似文献   

Technology-enhanced learning: Rethinking the term,the concept and its theoretical background     

Don Passey 《British journal of educational technology : journal of the Council for Educational Technology》2019,50(3):972-986

This theoretical paper is concerned with problematising the rethinking of theoretical backgrounds associated with one of the commonly used educational technology terms (fields)—technology-enhanced learning—in the wider context of scholarship. Examples will show that the term itself is now used beyond its apparent, stated scope, that it is used in a number of varied ways, and that this is in itself problematic. The ways in which the term is used will be identified, and from these a strategic categorisation to rethink the use of the single term in areas of scholarship (particularly research and teaching) will be proposed, offering terms specifically encompassing the realms in which technologies are being used. From this categorisation, it will be shown that each specific category is based on different conceptions related to or arising from practice. Consequently, ways that theoretical backgrounds should be considered will be explored in each case. While existing theoretical backgrounds enable conceptual underpinnings in some of those cases, in other cases it will be shown that there are currently no fully developed theories or limited theoretical frameworks available. The paper will conclude by identifying key research areas needed if we are to develop and take pertinent aspects of scholarship further forward.  相似文献   

Michael F. Suarez,S. J., and H. R. Woudhuysen,Editors: The Book: A Global History     

Alex P. Grover 《Publishing Research Quarterly》2017,33(3):352-355

  相似文献   

Weeding with Wisdom: Tuning Deselection of Print Monographs in Book-Reliant Disciplines     

Alex D. McAllister  Allan Scherlen 《资料收集管理》2017,42(2):76-91

As university libraries transition to digital collections and new services, their book deselection projects often lead to the adoption of cross-discipline quantitative weeding criteria (such as age and low circulation) in the interest of speed and presumed fairness. Cross-discipline quantitative rubrics, however, can have unintended negative consequences when applied to disciplines such as history and literature that rely on older books with low circulation statistics. The authors argue for a discipline-differentiated approach to weeding academic library collections that can employ quantitative criteria for disciplines, such as in the sciences, that are more reliant on current materials and qualitative criteria for disciplines, such as in the humanities, whose scholars benefit from ready access to older and low-use books.  相似文献   

Closing the PDF gap: ReadCube’s experiments in reader‐focused design          下载免费PDF全文

Alex Hodgson  Lucas Schlager 《Learned Publishing》2017,30(1):65-69

Key points

• Twenty years ago, a fraction of articles were paired with supplements; now, one in five research stories go beyond PDF.
• Why has the evolution of research content's delivery vehicles lagged behind the evolution of the research story?
• Hyperlinked in‐line references are the most used feature of the Enhanced PDF – exposing faster, easier ways to follow the path of research.
• Discovery need not start and end with the search engine – it can start within the PDF itself.
• Discovery is not a solitary process; therefore, content platforms must support collaboration to drive readership.

  相似文献   

The peritextual literacy framework: Using the functions of peritext to support critical thinking     

Melissa Gross  Don Latham 《Library & information science research》2017,39(2):116-123

The peritextual literacy framework (PLF) is a tool for accessing, evaluating, and comprehending the content of media using elements that frame the body of a work and mediate its content for the user. Paratextual elements are the focus of research in classification, bibliometrics, reader’s advisory work, and in studies of authorship and publication. However, paratextual theory is just beginning to be acknowledged in LIS. The PLF closes a gap in paratext theory by categorizing the functions of peritext into six types: production, promotional, navigational, intratextual, supplemental, and documentary. The PLF is unique that it provides both a framework for further research on peritext, as well as a pedagogical tool that supports teaching in the areas of information literacy, media literacy and analysis, critical thinking, reading, and media design and production.  相似文献   

Differences in science students' view of ideal and actual role behavior according to success and gender     

Don Kauchak  Ken Peterson 《科学教学研究杂志》1983,20(6):565-570

Information about how success and gender affect students' views of ideal and actual classroom role behavior can help both researchers and teachers better understand classroom components such as achievement and curriculum. A 20-item double Q sort was used to measure differences in perceptions of high school science students according to letter grades and gender. Individual Q sort item rankings of 160 students were tested for significant differences according to letter grade received; item ratings were compared according to gender for 215 students. Differences in perception according to success were found for both ideal and actual behavior; 8 and 5 items, respectively, out of each 20-item sort were found to be significant at the p = < 0.05 level. No such overall patterns of difference in view were found between boys and girls, although three ideal student items and one actual self-report item were found to be significantly different at the p = < 0.05 level.  相似文献   

The student departure puzzle: do some faculties and programs have answers?   总被引：1，自引：1，他引：0  

P.A. Danaher  Don Bowser 《高等教育研究与发展》2008,27(3):271-280

University attrition prevention strategies are typically generic, centrally managed, whole of university strategies that have emerged from an examination of whole of university attrition data. This paper takes an intra‐organisational comparative approach, through the examination of faculty and program attrition rates of students who joined an Australian university in the first term of 2004. The faculty with the highest attrition had a rate two‐and‐a‐half times that of the faculty with the lowest rate, and in programs with 40 or more students enrolled the program with the highest attrition had a rate over five times that of the program with the lowest rate. The paper identifies five practical implications of these findings and concludes that investigating the causes of these differences will help in understanding student attrition. It also suggests that universities wishing to reduce student attrition may benefit from adopting integrated and situated strategies that take into account faculty and program differences.  相似文献   

Relationships amongst cultural dimensions,educational expenditure and class size of different nations     

Hoi Yan Cheung  Alex W.H. Chan 《International Journal of Educational Development》2008

Many studies have concentrated on investigating educational expenditure and pupil–teacher ratio to see how these two factors can influence the quality of education. This study chooses to examine these two educational factors from a different perspective. If educational expenditure and pupil–teacher ratio really have a significant impact on the quality of education as many studies have claimed, it is important to step back and understand why some regions choose to have high/low educational expenditure and high/low pupil–teacher ratios. This study found that culture has an important impact on these two educational factors. Hofstede's cultural dimensions, namely Power Distance and Individualism, were applied and results showed that these two cultural dimensions, when applied to 43 regions around the world, demonstrated a significant impact on educational expenditure and pupil–teacher ratio.  相似文献