Leg amputation side determines performance in curve sprinting: a case study on a Paralympic medalist     

Johannes Funken  Kai Heinrich  Steffen Willwacher  Ralf Müller  Jonas Böcker  Hiroaki Hobara 《Sports biomechanics / International Society of Biomechanics in Sports》2019,18(1):75-87

The lower limb kinetics of curve sprinting in amputees are not well described in the literature, particularly with respect to the effect of the side of amputation. This is an issue due to the importance of the knowledge for prosthetic design and classification of athletes. Thus, the aim of this study was to investigate the influence of side of amputation on curve sprinting performance in athletes with a unilateral leg amputation. A three-dimensional motion analysis system (Vicon), four force plates (Kistler) and a modified mathematical human model (ALASKA) were used to compare clockwise and counter clockwise curve sprinting lower limb kinematics and kinetics of a Paralympic medalist with a left-sided knee exarticular amputation. Results reveal that vertical ground reaction force application and total vertical impulse were lower when the affected limb was at the inside of the curve. The unaffected limb showed joint mechanics different to those established for non-amputee athletes and might contribute better to propulsion when being the inside limb. Curve sprinting biomechanics and the ability to attain high radial velocities are directly dependent on the side of amputation relative to the curve direction in a unilateral amputee athlete of highest performance level.  相似文献   

Polytechnische Bildung und Berufserziehung in Internationaler Sicht     

Heinrich Abel 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1959,5(4):369-382

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Hidden dimensions in the so-called reality of a mathematics classroom     

Heinrich Bauersfeld 《Educational Studies in Mathematics》1980,11(1):23-41

Teaching and learning of mathematics in classrooms is interpreted as a situation of human interaction in an institutionalized setting. Using theories and categories from different disciplines - e.g., ethnomethodology, linguistics, cross-cultural studies—a documented mathematics classroom episode is re-analyzed. The analysis of the example is used to identify four hidden dimensions in the classroom process and thus deficient areas of research: The constitution of meaning through human interaction, the impact of institutional settings, the development of personality, and the process of reducing classroom complexity. Consequences for teacher training towards more reflected classroom experience are drawn.  相似文献   

Classroom cultures from a social constructivist's perspective     

Heinrich Bauersfeld 《Educational Studies in Mathematics》1992,23(5):467-481

Using examples from related case studies, the possible consequences of a social constructivist perspective for the teaching and learning of mathematics are discussed.  相似文献   

Thoughts on the state and prospects of the academic ethic in the universities of the Federal Republic of Germany     

Ernst Nolte 《Minerva》1983,21(2-3):161-171

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Robuste Indizes für Projection Pursuit     

Tobias Rohatsch  Gerhard P?ppel und Heinrich Werner 《Informatik - Forschung und Entwicklung》2002,17(2):53-59

Zusammenfassung.   Die moderne und hoch komplexe Fertigung, z.B. in der Halbleiterindustrie, erfordert für die dabei anfallenden Messdaten der Anlagen- bzw. Prozessparameter multivariate Analysemethoden. Eine dieser m?glichen Analysemethoden ist Projection Pursuit (PP). Dieses Verfahren ist durch geschickte Wahl des so genannten Projektionsindex in der Lage, verschiedenste Datencharakteristika zu detektieren und diese auf anschauliche Weise zu visualisieren. Bei den Projektionsindizes handelt es sich um Funktionen, die eine Projektion auf unterschiedliche Merkmale hin bewerten und dabei jeder Projektion einen Funktionswert zuweisen. Dieser Funktionswert spiegelt die Aussagekraft der Projektion (in Abh?ngigkeit vom verwendeten Index) wider. Die Auswahl bzw. der Aufbau dieser Indizes ist hierbei von entscheidender Bedeutung. Alle hier vorgestellten Indizes zeichnen sich vor allem durch ihren robusten Charakter gegenüber durch Ausrei?er kontaminierte Daten, wie sie in realen Datenszenarien vorkommen, aus. Die durch Anwendung dieser Indizes gewonnenen Einblicke in die komplexe Struktur der Daten erm?glichen es, hochdimensionale Parameterabweichungen und komplexe Zusammenh?nge innerhalb der Daten zu finden. Eingegangen am 11. Februar 2002 / Angenommen am 14. Mai 2002  相似文献   

Quality and efficiency of basic research in molecular biology: a bibliometric analysis of thirteen excellent research institutes     

Heinrich Herbertz  Benno Müller-Hill 《Research Policy》1995,24(6)

We try to assess, in a systematic and objective manner, the research performance of 13 research institutes active in the field of molecular biology. For this purpose we have counted the number of scientific publications and the number of citations received during a five-year period (1980–1984). We use citations per publication as an indicator of quality and costs per citation as an indicator of efficiency of research. Peer review seems to discourage uninteresting, i.e. not cited, research. Grant systems seem to work more efficiently than funding on a permanent institutional basis.  相似文献   

Preparation for lifelong learning using ePortfolios   总被引：1，自引：1，他引：1  

E. Heinrich  M. Bhattacharya  R. Rayudu 《European Journal of Engineering Education》2007,32(6):653-663

Rapid technological change, increasing globalization and a changing world of employment with multiple roles during one's professional life are necessitating a change from knowledge to learning societies. Full participation requires lifelong learning skills, meaning the ability to solve problems, work both independently and in a team, communicate effectively in all formats and on all levels, and self-direct one's learning and professional development needs. Universities need to take responsibility in preparing students for lifelong learning. While engineering and science degrees traditionally do not emphasize the importance of lifelong learning skills new programmes of study are now being introduced, often using electronic portfolios to support engagement with learning objectives and reflection. This article describes an electronic portfolio initiative that is targeted at engineering and computer science students. The initiative aims to create awareness among students on the nature and importance of lifelong learning skills, to facilitate the development of such skills and to assist students in showcasing their competence regarding these skills. Interviews with industry representatives regarding the characteristics of a lifelong learner and the values of constructing and presenting portfolios were conducted and have resulted in strong support for the electronic portfolio initiative. The article provides background on lifelong learning and electronic portfolios, outlines the design of the initiative and then focuses on feedback from industry representatives.  相似文献   

School decentralization as a process of differentiation,hierarchization and selection     

Herbert Altrichter  Martin Heinrich  Katharina Soukup-Altrichter 《教育政策杂志》2014,29(5):675-699

The Austrian ‘school autonomy policy’, which allowed schools to develop specific ‘curricular profiles’, is taken as an example for discussing processes and effects of school decentralization policies. Data from school case studies (based on qualitative interviews and document analysis) are used to analyse and interpret the processes by which schools and teachers take up policy innovations and translate it into action and structures on school and classroom level. These policy changes and the resulting governance regimes are examined from a perspective on changing modes of ‘action coordination’ between actors on different levels of a school system and from an attention to processes of ‘re-contextualization’ in multi-level governance systems. The main result is that the Austrian decentralization policy – although not explicitly based on a market approach – boosted principles of competitive coordination between schools. In consequence, it resulted in processes of differentiation and hierarchization of schools and classes and offered new legitimatory and practical opportunities for student selection.  相似文献   

Counselor Selection: A Critical Event in Program Management and Development     

Mitchell Salim  Natalie J. Leonard  L. William Heinrich 《Counselor Education & Supervision》1971,10(4):337-342

A coordinated process for selection of school counselors is presented. Responsibility for counselor selection is shared by central office and school building administrators. District personnel developed a selection instrument which is used to assess strengths and limitations of counselor candidates. Counselor profiles are then evaluated by the selection committee in light of district needs.  相似文献