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Eduard Grigorievitch Kostyashkin 《Prospects》1980,10(4):489-494
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Bacca-Acosta Jorge Tejada Julian Fabregat Ramon Kinshuk Guevara Juan 《Educational technology research and development : ETR & D》2022,70(1):339-362
Educational technology research and development - Scaffolding is a mechanism for helping novice learners to solve a problem or complete a task that is beyond their current skill set. Prior research... 相似文献
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Los autores proponen la Lingüística Textual para un reenfoque de las actividades de análisis de texto en la enseñanza. Como modelo de aplicación de esa propuesta se expone un caso de análisis textual de una nanación en el que se localizan los mecanismos de coherencia y se generan preguntas de control y ejercicios para que el alumno desarrolle estrategias de lectura. 相似文献
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Cecilia Avila Silvia Baldiris Ramon Fabregat Sabine Graf 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(4):1019-1038
The learning analytics (LA) field seeks to analyze data about students’ interactions, and it has been applied in the development of tools for supporting both learning and teaching processes. Recent research has paid attention on how LA may benefit teachers in the creation of educational resources. However, most of the research on LA solutions is carried out to support teachers in analyzing students’ behavior data collected as they interact with virtual learning environments. While solutions to support teachers in different virtual learning and teaching contexts have become important, to date little research has been done on how LA solutions can help teachers to create and evaluate Open Educational Resources (OERs). This study aims at presenting the evaluation of a LA tool for supporting teachers in the creation and evaluation of accessible and quality OERs considering that both processes fall within the competences that teachers can acquire and strengthen by participating as authors (creation) and evaluators (evaluation) of OERs. The study was conducted with Colombian teachers and the results obtained highlight the positive effect the tool had on the teachers’ acquisition of the competences and the positive attitude they had toward using the tool. 相似文献
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Orloff ND Dennis JR Cecchini M Schonbrun E Rocas E Wang Y Novotny D Simmonds RW Moreland J Takeuchi I Booth JC 《Biomicrofluidics》2011,5(4):44107-441079
We present a 91 MHz surface acoustic wave resonator with integrated microfluidics that includes a flow focus, an expansion region, and a binning region in order to manipulate particle trajectories. We demonstrate the ability to change the position of the acoustic nodes by varying the electronic phase of one of the transducers relative to the other in a pseudo-static manner. The measurements were performed at room temperature with 3 μm diameter latex beads dispersed in a water-based solution. We demonstrate the dependence of nodal position on pseudo-static phase and show simultaneous control of 9 bead streams with spatial control of −0.058 μm/deg ± 0.001 μm/deg. As a consequence of changing the position of bead streams perpendicular to their flow direction, we also show that the integrated acoustic-microfluidic device can be used to change the trajectory of a bead stream towards a selected bin with an angular control of 0.008 deg/deg ± 0.000(2) deg/deg. 相似文献
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This research studied the way immigration is depicted by the neighborhood press of Barcelona. Mainstream media tend to give visibility to immigrants when problems arise. Through this visibility based on problems, and the processes of framing, a virtual social identity is constructed and given to the immigration population. However, the neighborhood press of Barcelona, inscribed within the Catalan regional press’ own idea of journalism, offers a different approach to this issue due to its history, neighborhood and commitment to the region. Through a frame analysis, three main frames gave a depiction of the immigrants different from the one the mainstream media use. The results show that this differentiated depiction still stereotypes immigrants while not granting them enough visibility even when there is no blaming or attack. In this sense, while accounting for the differences, the neighborhood press of Barcelona misses a chance of depicting immigration in a more accurate way. 相似文献
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Eduard Gappmaier Sima F. Tavazoie Michael G. Jacketta 《Cardiopulmonary Physical Therapy Journal》2013,24(3):5-13
Purpose
Large therapeutic rolls (LTR) and balls are popular rehabilitation tools and have also been advertised as cardiovascular training devices. The aim of this study was to determine if individuals of varying fitness levels would reach aerobic training levels by evidence-based standards as described in American College of Sports Medicine (ACSM) publications.Methods
Fourteen volunteers performed a maximal exercise test and on subsequent days, two submaximal exercise tests on the LTR (LTR-A and -B). LTR-A consisted of four 5-minute stages of exercise at progressive intensity levels. LTR-B included 20 minutes of continuous exercise. Oxygen consumption (VO2) and heart rate (HR) during exercise on the LTR were compared with ACSM recommended standards.Results
The average (range) peak intensity achieved during LTR-A was 66.8% (51.7-82.7%) of maximal VO2 reserve (VO2R) and 82.9% (70.7%-91.2%) of maximal heart rate (HRmax). During LTR-B, HR and VO2 of all participants was maintained at moderate exercise intensity and averaged 56% of VO2R and 78% of HRmax during the 20 minute exercise period.Conclusions
These findings suggest that individuals with a wide range of aerobic fitness are able to reach and maintain aerobic training levels with appropriate exercise on a large therapeutic roll or ball.Key Words: large therapeutic roll, Swiss Ball, aerobic exercise, exercise intensity 相似文献10.
The purpose of this investigation was to assess the effect of compression sleeves on muscle activation cost during locomotion. Twenty-two recreationally active men (age: 25 ± 3 years) ran on a treadmill at four different speeds (ordered sequence of 2.8, 3.3, 2.2, and 3.9 m/s). The tests were performed without (control situation, CON) and while wearing specially designed lower leg compression sleeves (SL). Myoelectric activity of five lower leg muscles (tibialis anterior, fibularis longus, lateral and medial head of gastrocnemius, and soleus) was captured using Surface EMG. To assess muscle activation cost, the cumulative muscle activity per distance travelled (CMAPD) of the CON and SL situations was determined. Repeated measures analyses of variance were performed separately for each muscle. The analyses revealed a reduced lower leg muscle activation cost with respect to test situation for SL for all muscles (p < 0.05, ηp2 > 0.18). The respective significant reductions of CMAPD values during SL ranged between 4% and 16% and were largest at 2.8 m/s. The findings presented point towards an improved muscle activation cost while wearing lower leg compression sleeves during locomotion that have potential to postpone muscle fatigue. 相似文献