This study aimed to determine the effect of different percentages of body weight support (BWS) on spatiotemporal step characteristics during running. 26 endurance runners (age: 37 ± 9 years) completed a running treadmill protocol consisting of 6 different conditions (BWS combinations: 0–50%), with velocity maintained at 12 km/h. Each condition lasted 1 minute. Step angle, ground contact time (CT), flight time (FT), step length (SL) and frequency (SF), and duration of phases during stance time (phase1: initial contact; phase2: midstance; phase3: propulsion) were measured for every step during the test using a photoelectric cell system. Compared with the baseline condition (100% BW), FT was longer, CT was shorter, SL was longer, SF was lower, and the step angle was higher with each increase in BWS (p < 0.05). Also, some changes were observed in the duration of phases during stance time: phase1 did not experience changes across experimental conditions (p = 0.096), phase2 decreased and phase3 increased as BW was supported (p < 0.05). These results indicate that as BW was supported, runners showed longer FT and SL, shorter CT, lower SF, and greater step angle as well as some changes in the phases during the ground contact. Therefore, this study highlights the effect of different percentages of BWS on spatiotemporal parameters. 相似文献
R&D subsidies designed to encourage innovation efforts by firms may have intended and unintended effects on the way they organize their innovation process. We present empirical evidence on how R&D subsidies affect firms’ R&D cooperation strategies. In particular, we investigate whether receiving public R&D subsidies affect the probability that a firm will set up an R&D partnership with a public research organization (PRO), or with other firms. Our main findings are: (i) public support significantly increases the chances that a firm will cooperate with a PRO, and (ii) public support also increases the likelihood that a firm will establish private partnerships, but to a smaller extent and only when firms have intangible knowledge assets. These results suggest that public R&D programmes trigger a behavioural change in firms’ R&D partnerships, alleviating barriers to cooperation. 相似文献
In this study, eight teachers and three college students involved in a graduate-level Internet course developed skill in using Internet tools and authoring webware materials. The course followed a traditional classroom-based format, but was supported by a webware package developed by the instructor (http://www.sover.net/~milcasa/503). A case study research methodology was utilized to investigate how the implementation of a “strategy redundancy” device, which consisted of the instructor's use of five teaching strategies and their mirroring in five of the features of the webware package, affected the participants′ learning outcomes. Qualitative and quantitative data were collected from seven sources. A causal relationship was found between the “strategy redundancy” device and the effectiveness of the course. The need to emphasize the “quality” of the teaching/ learning experience, vis-à-vis the “cost savings” value of technology tools, and the need to conciliate constructivist and instructivist learning were highlighted. 相似文献
This piece examines the historical construction of a Lusophone cultural-linguistic media space and market that spans portions of Europe, Africa, and South America. Beginning with the Portuguese colonization of Brazil and Lusophone Africa in the 17th century and continuing to the contemporary moment, our discussion examines how a combination of political, ideological, and economic patterns created linkages between Portugal, Brazil, and Portuguese-speaking colonies in Africa (namely Angola, Cape Verde, and Mozambique). After examining how Brazil grew to become the dominant cultural producer in this transnational matrix (most explicitly expressed through the massive exports of telenovelas and music since the late 1970s), we examine how other countries are beginning to carve out distinctive national niches, including the contemporary music scene in Cape Verde and the rise of domestically produced telenovelas in Portugal and Angola that are increasing in circulation in the contemporary transnational Lusophone media space. 相似文献
Background: One of the essential elements within Sport Education is the inclusion of student roles and responsibilities. While previous research has examined students’ performance in officiating tasks, the examination of student-coaches’ pedagogical content knowledge (PCK) within peer-assisted tasks of Sport Education has been scarce. Indeed, the only study to date which has examined student-coach effectiveness was conducted by Wallhead and O’Sullivan [2007. “A Didactic Analysis of Content Development During the Peer Teaching Tasks of a Sport Education Season.”Physical Education and Sport Pedagogy 12 (3): 225–243]. In that study, student-coaches struggled to manifest PCK by providing appropriate demonstrations, to diagnose errors, or to modify tasks for higher order content development. The study of PCK may be a useful heuristic to examine instructional effectiveness in physical education.
Purpose: The purpose of this study was to examine the evolution of the PCK of a cohort of student-coaches across three hybrid Sport Education-Step Game Approach seasons, and to examine the impact of protocols put in place to specifically enhance coaches’ PCK.
Participants and setting: Twenty-one students and one teacher from a school class in the north of Portugal participated in the present study.
Method: Data from multiple sources were collected: (a) videotape observations of all lessons, (b) field notes, and (c) pre-lesson interviews with the student-coaches. These were then subjected to deductive examination through a process of thematic analysis.
Findings and conclusions: Following a baseline season that identified four key limitations within the student-coaches’ instruction (task presentation, error diagnosis, feedback, and task modification), these students participated in specific coach preparation that involved modelling teacher’s instruction, pre-lesson meetings, and coaches’ corners. While showing marked improvement in their content knowledge across the second season, a second protocol was instigated during the third that involved the student-coaches to participate in stimulated reflections of their instruction and the incorporation of planning sheets to enhance their instruction. It was found that both interventions were efficacious in developing student-coaches’ PCK, which allowed a more complete transfer of the instructional responsibility from the teacher to the students. These results give insight into the importance of including coach education protocols within the design of seasons of Sport Education with respect to student-coaches’ instructional preparation. 相似文献
Résumé Le C.P.E.D.S. de Barcelone est une institution chargée de l'intégration des déficients sensoriels à l'école dite normale. Sur la base d'une étude longitudinale effectuée entre 1978 et 1986 dans 12 écoles, on a analysé le matériel recueilli concernant les réunions d'enseignants. Avec une méthode à orientation ethnographique, on a distingué trois types de réunions: Les réunions d'évaluation de toutes les classes d'un même cycle, où participent enseignants, personnel spécialisé et le directeur; des réunions programmées entre un enseignant et le spécialiste du C.P.E.D.S.; et des réunions informelles (dites de couloir) entre ces derniers. Dans un premier niveau on a analysé les actions, pour chercher à dégager, dans une deuxième étape, la structure sous-jacente à la réunion en dévoilant les rôles, les rites et les stratégies de défense et d'évitement. En guise de synthèse, enfin, l'analyse a été replacée dans son contexte (institutionnel et historique), le but étant de saisir l'écart entre les objectifs explicites et le mode de fonctionnement des réunions d'enseignants.
TheCentro Psico-Pedagógico para la Educación del Deficiente Sensorial (C.P.E.D.S.) in Barcelona was established for the purpose of integrating children with sensory handicaps into so-called normal schools. On the basis of a longitudinal study carried out in 12 schools between 1978 and 1986, the authors have analysed the data collected on teachers' meetings. Using an ethnographically based approach, they have identified three types of meeting: evaluatory meetings for all classes in one year-group in which teachers, specialist staff and the director participate; scheduled meetings between one teacher and the C.P.E.D.S. specialist; and informal, so-called corridor meetings between the latter. At the first level the actions of participants have been analysed, in order to try and bring into the open the latter's roles, rituals, defence strategies and methods of evasion. By way of synthesis, the analysis is finally placed once more into its institutional and historical context, the aim being to indicate the disparity between the explicit objectives of the teachers' meetings and the manner in which these function.
Zusammenfassung DasCentro Psico-pedagógico para la Educación del Deficiente Sensorial (C.P.E.D.S.) in Barcelona ist eine Einrichting zur Integration sinnesgestörter Kinder in sogenannte Normal schulen. Die aufgrund einer in der Zeit von 1978 bis 1986 an 12 Schulen durchgeführten Langzeitstudie gesammelten Daten über Lehrerzusammenkünfte wurden von den Verfassern analysiert. Anhand einer ethnographisch-orientierten Methode wird zwischen drei verschiedenen Arten von Lehrerzusammenkünften unterschieden: Zusammenkünfte für die Auswertung aller Klassen einer Stufe unter Beteiligung der Lehrer, der Fachkräfte und des Direktors; Zusammenkünfte, die zwischen einem Lehrer und der C.P.E.D.S. Fachkraft geplant sind; und informelle, sogenannte Korridorgespräche zwischen den beiden letztgenannten. In einem ersten Schritt werden die Handlungen der Teilnehmer untersucht, um anschließend deren Rollen und Rituale sowie Verhaltensweisen des Abwehrens und Ausweichens ans Licht zu bringen. Abschließend wird in Form einer Synthese die Analyse wiederum in ihren institutionellen und historischen Kontext gestellt, mit der Absicht, die Ungleicheit zwischen den expliziten Zielsetzungen der Lehrerzusammenkünfte und der Art und Weise, in der diese ablaufen, zu verdeutlichen.
This article presents a study that examined the impact of visual communication on the quality of the early interaction between deaf and hearing mothers and fathers and their deaf children aged between 18 and 24 months. Three communication mode groups of parent-deaf child dyads that differed by the use of signing and visual-tactile communication strategies were involved: (a) hearing parents communicating with their deaf child in an auditory/oral way, (b) hearing parents using total communication, and (c) deaf parents using sign language. Based on Loots and colleagues' intersubjective developmental theory, parent-deaf child interaction was analyzed according to the occurrence of intersubjectivity during free play with a standard set of toys. The data analyses indicated that the use of sign language in a sequential visual way of communication enabled the deaf parents to involve their 18- to 24-month-old deaf infants in symbolic intersubjectivity, whereas hearing parents who hold on to oral-only communication were excluded from involvement in symbolic intersubjectivity with their deaf infants. Hearing parents using total communication were more similar to deaf parents, but they still differed from deaf parents in exchanging and sharing symbolic and linguistic meaning with their deaf child. 相似文献
The aim of this paper is to present the educational experiences that have been implemented in the community of Madrid (Spain) with students with severe visual impairment or blindness. We highlight why and how the new educational policies being implemented have achieved the genuine inclusion of these students in line with European educational objectives. The study was carried out during the academic years 2010–11 to 2015–16. We conclude that the educational inclusion of students with visual impairment becomes a reality upon the effective participation of two specialized teams, namely, the educational psychologists for young children (divided in stages from zero to three years and from four to 12 years of age) and the educational specialists in visually impaired children. This constitutes a prime example that can be extended to other contexts and other disabilities. It becomes evident that, to be effective, inclusive education requires a joint and coordinated response from all professionals involved in the education process. 相似文献
This longitudinal study of child abuse and neglect cases closed after investigation examined the impact of parental substance abuse on family functioning and on subsequent referrals to child protective services. The findings support the hypothesis that parental substance abuse would have a negative impact on family functioning, which, in turn, would result in a higher rate of re-reports. As expected, substance abuse also had a direct impact on re-reports. It is critical that the child welfare system recognize and respond to parental substance abuse problems in these families through expanded and improved voluntary, and perhaps, mandatory services. 相似文献