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91.
92.
Recumbent bicycles (RB) are high performance, human-powered vehicles. In comparison to normal/upright bicycles (NB) the RB may allow individuals to reach higher speeds due to aerodynamic advantages. The purpose of this investigation was to compare the non-aerodynamic factors that may potentially influence the performance of the two bicycles. 3D body centre of mass (BCoM) trajectory, its symmetries, and the components of the total mechanical work necessary to sustain cycling were assessed through 3D kinematics and computer simulations. Data collected at 50, 70, 90 110 rpm during stationary cycling were used to drive musculoskeletal modelling simulation and estimate muscle-tendon length. Results demonstrated that BCoM trajectory, confined in a 15-mm side cube, changed its orientation, maintaining a similar pattern across all cadences in both bicycles. RB displayed a reduced additional mechanical external power (16.1 ± 9.7 W on RB vs. 20.3 ± 8.8 W on NB), a greater symmetry on the progression axis, and no differences in the internal mechanical power compared to NB. Simulated muscle activity revealed small significant differences for only selected muscles. On the RB, quadriceps and gluteus demonstrated greater shortening, while biceps femoris, iliacus, and psoas exhibited greater stretch; however, aerodynamics still remains the principal benefit. 相似文献
93.
Building on previous work on “regulatory objectivity,” the paper examines recent translational research and cancer genomics to explore the bundle of scientific and regulatory activities that generate and manage the platforms at the core of clinical trials, the “gold standard” of clinical research and evidence-based medicine. In particular, the paper explores the activities of a chain of mediators within a seamless regulatory web characterized by the interaction of endogenous and hybrid regulatory activities that are neither hierarchical nor linear. We contend that a full understanding of the dynamics of regulation in the biomedical domain ought to consider this chain of mediations; that their analysis necessitates understanding the content of the practices they regulate; and that in addition to examining the interactions between different regulatory modalities, we need to pay attention to their development insofar as regulation, far from being mere routine, leads to the emergence of novelty by coproducing the entities it regulates. These activities include not only setting out the conditions that must be respected in order to produce reliable test results, but also the conditions that define the relations (within a clinical context) between the different components of diagnosis as well as the consequences of such relations on clinical judgment. This is why we cannot treat organizational practices as distinct from the content of bio-clinical activities. 相似文献
94.
William W. Brickman Willy Strzelewicz William Taylor Joachim H. Knoll Mark Blaug Oskar Anweiler Andreas Fuchs Gilda L. de Romero Brest Alberto Aráoz Wolfgang Brezinka Enrique Oteiza W. F. Connell Robert J. Havighurst Daniel F. Wozniak Wolfgang Roth Karl Frey Alfons Otto Schorb 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1970,16(2):221-249
95.
Swiss vocational education and training (VET) is defined as a dual-track system where apprentices weekly alternate between vocational school and a (real) workplace. At the workplace, they have to keep a learning documentation throughout their training, in which they are expected to regularly document their professional development. The actual use of this documentation remains limited, however, and its potential for learning is clearly underexploited. The study presented in this paper sheds light on the current practices and issues related to the use of such a learning documentation in the Swiss VET system. Semi-structured interviews (N?=?29) were conducted with representatives of all the main actors of the Swiss VET system for various professional domains (Industrial & Handicraft, Commerce, and Health & Social Care). The study shows that although they all tend to see the potential of the learning documentation, the different actors of VET do not share a same conception of the aims and functions, both within and across professions. Based on their answers, possible improvements for this tool are discussed, and suggestions are made to enhance its use as a boundary object throughout the training. 相似文献
96.
We compare the accuracy of confidence intervals (CIs) and tests of close fit based on the root mean square error of approximation (RMSEA) with those based on the standardized root mean square residual (SRMR). Investigations used normal and nonnormal data with models ranging from p = 10 to 60 observed variables. CIs and tests of close fit based on the SRMR are generally accurate across all conditions (even at p = 60 with nonnormal data). In contrast, CIs and tests of close fit based on the RMSEA are only accurate in small models. In larger models (p ≥ 30), they incorrectly suggest that models do not fit closely, particularly if sample size is less than 500. 相似文献
97.
In this paper the authors argue that the use of the Open Method of Coordination (OMC) in the implementation of the Bologna process presents coordination problems that do not allow for the full coherence of the results. As the process is quite complex, involving three different levels (European, national and local) and as the final actors in the implementation process higher education institutions (HEIs) have considerable degree of autonomy, assuming that the implementation of Bologna is a top–down linear policy implementation process does not account for the developments taking place, which produce implementation difficulties at several different levels. Constraints resulting from economic concerns at European and national levels may be an obstacle for the Bologna’s contribution to a social Europe. 相似文献
98.
Rubén?Alberto?Cervini?IturreEmail author 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2005,51(2-3):173-200
Using data from the 1998 High School National Census from the Ministry of Education and Culture of Argentina, the present study examines relationships between school composition, some characteristics of schooling (such as institutional culture and climate), and students’ achievement in Mathematics in the last year of high school. The study applies multilevel linear modeling on the levels of student, school and state. It finds a close relationship between achievement in Mathematics and the variables of school composition and schooling processes. It shows that when both variables act together, the effect of all other variables significantly decreases. The variables of schooling processes, however, even when diminished in influence, nonetheless notably continue to affect students’ achievements. The study also identifes a reference model for future studies evaluating other institutional factors of learning. 相似文献
99.
Amaury Nora Alberto Cabrera Linda Serra Hagedorn Ernest Pascarella 《Research in higher education》1996,37(4):427-451
The results of the study indicated that institutional experiences, academic achievement, and environmental pull factors contributed the most to persistence decisions. Furthermore, analyses revealed that differences in the effects of these factors for different ethnic and gender groups were important in explaining persistence decisions. No precollege factors (educational aspirations, prior academic achievement, attitudes toward learning, and support and encouragement to attend college) were found to improve the overall fit of the models for any of the groups in the study. For minorities, the biggest detrimental effects on dropout behavior were derived from pull factors in the form of family responsibilities and working off-campus. No significant positive effects from informal and formal interactions with faculty, close personal relationships with peers, and academic experiences during their first year in college were found to negate the large negative influences from the pull factors. For females, the most significant positive effect on college persistence came from mentoring experiences in the form of nonclassroom interactions with faculty. 相似文献
100.
Falomo Bernarduzzi Lidia Bernardi Ester Maria Ferrari Alberto Garbarino Maria Carla Vai Andrea 《Science & Education》2021,30(3):755-773
Science & Education - The Pavia University History Museum, which houses historic items mainly connected to the physics and medicine fields, has focused in the past years on new ways to involve... 相似文献