Three-dimensional kinematic analysis and power output of elite flat-water kayakers     

Anna Bjerkefors  Olga Tarassova  Johanna S. Rosén  Pascal Zakaria  Anton Arndt 《Sports biomechanics / International Society of Biomechanics in Sports》2018,17(3):414-427

The purpose was to examine power output and three-dimensional (3D) kinematic variables in the upper limbs, lower limbs and trunk in elite flat-water kayakers during kayak ergometer paddling. An additional purpose was to analyse possible changes in kinematics with increased intensity and differences between body sides. Six male and four female international level flat-water kayakers participated. Kinematic and kinetic data were collected during three tasks; low (Int_L), high (Int_H) and maximal (Int_M) intensities. No differences were observed in any joint angles between body sides, except for shoulder abduction. Significantly greater range of motion (RoM) values were observed for Int_H compared to Int_L and for Int_M compared to Int_L in trunk and pelvis rotation, and in hip, knee and ankle flexion. The mean maximal power output was 610 ± 65 and 359 ± 33 W for the male and female athletes, respectively. The stroke frequencies were significantly different between all intensities (Int_L 59.3 ± 6.3; Int_H 108.0 ± 6.8; Int_M 141.7 ± 18.4 strokes/min). The results showed that after a certain intensity level, the power output must be increased by other factors than increasing the joint angular RoM. This information may assist coaches and athletes to understand the relationship between the movement of the kayaker and the paddling power output.  相似文献   

Will DNA profiling fuel prejudice?     

Gosline A 《New scientist (1971)》2005,186(2494):12-13

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Democratizing West German Education∗     

Richard L. Merritt  Ellen P. Flerlage  Anna J. Merritt 《比较教育学》1971,7(3):121-136

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Paul Hellgren: in memoriam     

Anna‐Liisa Leino 《欧洲师范教育杂志》1994,17(1-2)

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Methods and Techniques Used in Significant Restoration Projects in Qatar     

Silvia Mazzetto  Attilio Petruccioli 《文物保护研究》2018,63(5):303-314

The large number of conservation and restoration works recently completed in Qatar show that there exists a need to enhance appreciation of the local architectural and building traditions, as a way of bringing to light the historical memory of these local places, using local techniques and materials to conserve existing buildings and to typologically integrate them. This paper offers an update on the status of some recent conservation projects in Qatar, analysing and comparing a number of completed restorations of historic buildings on the basis of the categories into which they can be organised; the extent to which they had deteriorated before restoration; the methods that were adopted; the construction materials and techniques used; the philosophical approach taken to restoration; and the various proposals for reusing the restored buildings. Comparison and analysis of the data make it possible to classify these methods and techniques in ways that could be applied to other conservation projects in future. The aim is to define a philosophy and methodologies that are consistent, and will be able to give expression to the specific local culture in matters of conservation, while respecting shared international rules.  相似文献   

A Model for Vibration Monitoring of Immovable Art in Churches: Reflections on Monitoring as a Tool for Preventive Conservation     

Anna Henningsson 《文物保护研究》2018,63(5):113-120

ABSTRACT

During construction of a 6 km long railway tunnel close to historic churches in Stockholm, a preventive monitoring model was applied for ensembles of large-scale immovable ecclesiastical artworks. Construction work such as blasting and pile-driving took place during five years under or very close to these immovable works of art. In Sweden, risk assessment related to construction work is focused on risks associated with the building; meanwhile, there is no common approach for protecting the immovable historic works of art and architectural surfaces. This paper discusses how a preventive model for vibration monitoring on immovable artworks was developed and used as well as how the preventive purpose was perceived by different stakeholders during and after the tunnelling work. Experience from this project concludes that monitoring that includes uniform visual inspection becomes crucial for being able to protect the artworks. The concept of vibrations standards relying on fixed numbers of critical vibrations levels for mitigating the effects of vibration on immovable art can be questioned based on experiences from this project.  相似文献   

Situating Expertise in Practice: Domain-Based Data Management Training for Liaison Librarians     

Jamie Wittenberg  Anna Sackmann  Rick Jaffe 《The Journal of Academic Librarianship》2018,44(3):323-329

The research data management team at the University of California, Berkeley implemented a domain-based Librarian Training Program in order to upskill liaison librarians in research data management principles and create a community of practice among librarians providing research data support. The training program partnered with representatives from each subject division of the Library to integrate content from relevant disciplines. The training model emphasized scaffolding and concrete deliverables, teaching specific tools and concepts, and creating learning objects useful for instruction and outreach. Employing a situated, learning-based, pedagogical model, the program was more successful than previous attempts at library-wide research data management training at Berkeley. This analysis details the program management, curricular design, instruction, and outcomes that made the Library Training Program successful.  相似文献   

À la mémoire de Tamàs Varga     

Anna Zofia Krygowska 《Educational Studies in Mathematics》1988,19(3):289-290

Sans résumé  相似文献   

The Times,They Need A Changing: Infusing Social Justice Into Kinesiology Requires Collaboration     

Anna Marie Frank 《Quest (Human Kinetics)》2018,70(2):155-165

We live in challenging times. The divisions among people related to race, gender, gender identity, religion, and socioeconomic class are becoming more apparent. Past efforts toward social justice and the dismantling of these divisions seem to be losing their momentum and are even negated. As kinesiologists, we each need to commit to standing for social justice with every opportunity we are presented with and most importantly, in our classes. After a review of terms and clarification of ideas related to diversity and social justice, this lecture will present the position that collaboration will provide an effective approach to develop the knowledge, skills, and confidence essential to appropriately address diversity in our professional lives and advocate for social justice. This collaboration should be across disciplines and move us beyond our own research agendas to working with those whose research agendas or areas of expertise are diversity and social justice. Our collective commitment and collaborations will hopefully change the times we are living in to one where each person is respected for who they are, and social justice becomes part of our American fabric.  相似文献   

Home literacy as a special language environment to prepare children for school     

Paul P. M. Leseman  Anna F. Scheele  Aziza Y. Mayo  Marielle H. Messer 《Zeitschrift für Erziehungswissenschaft》2007,10(3):334-355

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