Hybrid compression of inverted lists for reordered document collections     

Diego Arroyuelo  Mauricio Oyarzún  Senén González  Victor Sepulveda 《Information processing & management》2018,54(6):1308-1324

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Constructing Explanations in Science: Informal Formative Assessment Practices Among Science Teachers of English Learners     

Román  Diego  del Rosal  Karla  Basaraba  Deni 《Research in Science Education》2019,49(4):1055-1067

Research in Science Education - Informal formative assessments (IFAs) are classroom interactions teachers use to gather information about their students’ learning, interpret it, and act on...  相似文献   

A probabilistic model for analysing the effect of performance levels on visual behaviour patterns of young sailors in simulated navigation     

Aarón Manzanares  Ruperto Menayo  Francisco Segado  Diego Salmerón  Juan Antonio Cano 《European Journal of Sport Science》2015,15(3):203-212

Abstract

The visual behaviour is a determining factor in sailing due to the influence of the environmental conditions. The aim of this research was to determine the visual behaviour pattern in sailors with different practice time in one star race, applying a probabilistic model based on Markov chains. The sample of this study consisted of 20 sailors, distributed in two groups, top ranking (n = 10) and bottom ranking (n = 10), all of them competed in the Optimist Class. An automated system of measurement, which integrates the VSail-Trainer® sail simulator and the Eye Tracking System^TM was used. The variables under consideration were the sequence of fixations and the fixation recurrence time performed on each location by the sailors. The event consisted of one of simulated regatta start, with stable conditions of wind, competitor and sea. Results show that top ranking sailors perform a low recurrence time on relevant locations and higher on irrelevant locations while bottom ranking sailors make a low recurrence time in most of the locations. The visual pattern performed by bottom ranking sailors is focused around two visual pivots, which does not happen in the top ranking sailor's pattern. In conclusion, the Markov chains analysis has allowed knowing the visual behaviour pattern of the top and bottom ranking sailors and its comparison.  相似文献   

Effect of hand paddles and parachute on butterfly coordination     

Thiago Telles  Renato Barroso  Augusto Carvalho Barbosa  Diego Fortes de Souza Salgueiro  Emilson Colantonio  Orival Andries Júnior 《Journal of sports sciences》2015,33(10):1084-1092

This study investigated the effects of hand paddles, parachute and hand paddles plus parachute on the inter-limb coordination of butterfly swimming. Thirteen male swimmers were evaluated in four random maximal intensity conditions: without equipment, with hand paddles, with parachute and with hand paddles + parachute. Arm and leg stroke phases were identified by 2D video analysis to calculate the total time gap (T1: time between hands’ entry in the water and high break-even point of the first undulation; T2: time between the beginning of the hand’s backward movement and low break-even point of the first undulation; T3: time between the hand’s arrival in a vertical plane to the shoulders and high break-even point of the second undulation; T4: time between the hand’s release from the water and low break-even point of the second undulation). The swimming velocity was reduced and T1, T2 and T3 increased in parachute and hand paddles + parachute. No changes were observed in T4. Total time gap decreased in parachute and hand paddles + parachute. It is concluded that hand paddles do not influence the arm-to-leg coordination in butterfly, while parachute and hand paddles + parachute do change it, providing a greater propulsive continuity.  相似文献   

Performance and Perception in the Flipped Learning Model: An Initial Approach to Evaluate the Effectiveness of a New Teaching Methodology in a General Science Classroom     

David González-Gómez  Jin Su Jeong  Diego Airado Rodríguez  Florentina Cañada-Cañada 《Journal of Science Education and Technology》2016,25(3):450-459

“Flipped classroom” teaching methodology is a type of blended learning in which the traditional class setting is inverted. Lecture is shifted outside of class, while the classroom time is employed to solve problems or doing practical works through the discussion/peer collaboration of students and instructors. This relatively new instructional methodology claims that flipping your classroom engages more effectively students with the learning process, achieving better teaching results. Thus, this research aimed to evaluate the effects of the flipped classroom on the students’ performance and perception of this new methodology. This study was conducted in a general science course, sophomore of the Primary Education bachelor degree in the Training Teaching School of the University of Extremadura (Spain) during the course 2014/2015. In order to assess the suitability of the proposed methodology, the class was divided in two groups. For the first group, a traditional methodology was followed, and it was used as control. On the other hand, the “flipped classroom” methodology was used in the second group, where the students were given diverse materials, such as video lessons and reading materials, before the class to be revised at home by them. Online questionnaires were as well provided to assess the progress of the students before the class. Finally, the results were compared in terms of students’ achievements and a post-task survey was also conducted to know the students’ perceptions. A statistically significant difference was found on all assessments with the flipped class students performing higher on average. In addition, most students had a favorable perception about the flipped classroom noting the ability to pause, rewind and review lectures, as well as increased individualized learning and increased teacher availability.  相似文献   

A model of the role of error detection and self-regulation in academic performance     

Ángela Zamora  José Manuel Súarez  Diego Ardura 《The Journal of educational research》2018,111(5):595-602

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Textbooks of doubt: using systemic functional analysis to explore the framing of climate change in middle-school science textbooks     

Diego Román  K.C. Busch 《Environmental Education Research》2016,22(8):1158-1180

Middle school students are learning about climate change in large part through textbooks used in their classes. Therefore, it is crucial to understand how the language employed in these materials frames this topic. To this end, we used systemic functional analysis to study the language of the chapters related to climate change in four sixth grade science textbooks adopted in the state of California. The linguistic variables investigated were: types of nominal groups; processes; circumstances; and the modality system. Our findings showed that these textbooks framed climate change as uncertain in the scientific community – both about whether it is occurring as well as about its human-causation. The implications for science education are discussed in relation to how the current political and public discourses of climate change, rather than the scientific discourse, is influencing how textbooks discuss this topic.  相似文献   

Cultivating an online teacher community of practice around the instructional conversation pedagogy: a social network analysis     

Boada  Diego A. 《Educational technology research and development : ETR & D》2022,70(1):289-319

Educational technology research and development - This mixed methods study followed an explanatory sequential design to explore the formation, development, and evolution of a formal online teacher...  相似文献   

Pigments and binders in “Madonna col Bambino e S. Giovannino” by Botticelli investigated by micro-Raman and GC/MS     

Danilo Bersani  Pier Paolo Lottici  Antonella Casoli  Diego Cauzzi 《Journal of Cultural Heritage》2008,9(1):97-102

During the restoration plan of the famous painting “Madonna col Bambino e S. Giovannino” by Sandro Botticelli, located in the Museo Civico of Piacenza (Italy), a study on painting materials was carried out. The pigments, the binders and the materials used for the application of ground and priming layers were studied using micro-Raman spectroscopy, gas chromatography coupled with mass spectrometry (GC/MS), optical and electronic microscopies. Gypsum and anhydrite were found in the ground layer, while carbon black and lead white were used in the priming layers. The precious pigments of the artist's palette and the binders used (egg and animal glue) were determined.  相似文献   

Validity and reliability of rating perceived exertion in women with fibromyalgia: exertion-pain discrimination     

Alberto Soriano-Maldonado  Jonatan R. Ruiz  Inmaculada C. Álvarez-Gallardo  Víctor Segura-Jiménez  Alfredo Santalla  Diego Munguía-Izquierdo 《Journal of sports sciences》2015,33(14):1515-1522

The present study aimed (1) to assess the validity and reliability of the Borg category-ratio (CR-10) scale for monitoring exercise intensity in women with fibromyalgia (FM) and (2) to examine whether women with FM can discriminate between perceived exertion and exercise-induced pain. Thirty-three women with FM performed two incremental treadmill tests (1 week separated). Heart rate, oxygen uptake, minute ventilation and respiratory quotient were measured. The ratings of perceived exertion (RPE: CR-10 scale) and exercise-induced pain were obtained at each workload. The Spearman’s correlation of RPE with the physiological responses ranged from 0.69 to 0.79. The regression models explained ~50% of the variability of the studied physiological responses. We found “perfect acceptable” agreement in 69% of the observations. Weighted Kappa was 0.66 (95% confidence interval [CI]: 0.59–0.72). There were differences between RPE and pain at workloads 3 (1.50; 95%CI: 0.85–2.16), 4 (2.10; 95%CI: 1.23–2.96), 5 (3.40; 95%CI: 1.29–5.51) and 6 (3.97; 95%CI: 1.61–6.33). The main findings of the present study suggest that the Borg CR-10 scale is valid and moderately reliable for monitoring exercise intensity in women with FM, and these patients were able to discriminate between exertion and exercise-induced pain.  相似文献