排序方式： 共有49条查询结果，搜索用时 31 毫秒
41.
Gianpaolo Perrella Giovanni Maria Montuori Massimiliano Fraldi Elena Mele 《浙江大学学报(A卷英文版)》2016,17(6):427-442
The efficiency of a long-span structure relies on how material is locally distributed within a fixed structural shape. In this paper a design procedure for thin plates made of three layers of a depleted material subject to a distributed vertical load is proposed. The investigation is driven by the idea of the optimal material organization and has the objective of maximizing the overall stiffness/weight ratio of the structure. Two microstructural architectures of the media are considered: a porous solid structure and a truss arrangement. For each type of microstructure the flexural stiffness has been correlated to the level of depletion by the use of a power law function by setting very few parameters. Finally, invoking the principles of structural homogenization theory, the global flexural response of the plate has also been calculated. The validity of the method is demonstrated by comparing the analytical results with those obtained by a numerical finite element simulation of the structure based on a detailed model of the media. 相似文献
42.
Palmiero Massimiliano 《High Ability Studies》2015,26(1):93-104
Age-related changes in divergent thinking and creative objects production were investigated in 150 native Italian speakers, divided into six age groups, each one comprised 25 participants: young (20–29), young adult (30–39), middle aged (40–49), adult-old (50–59), old (60–69), and old-old (70–80). Two tasks were used: the alternative uses task, which measures divergent thinking, and the creative mental synthesis task, which measure the ability to create objects belonging to specific categories. Results showed that the peaking of performances at both tasks is reached before 40 years, and declines thereafter. The analysis also showed that divergent thinking and creative objects production stabilize after 40 years and decline after 70 years, especially the ability to create objects. These results reveal that creative thinking might be preserved across years. 相似文献
43.
Over the years the debate on the aims, approaches, and impacts of formative assessment has never stopped to grow. Parallel to this growth is the awareness that it is crucial to understand what conceptions teachers have of assessment in order to guarantee more effective teacher education. This paper tries to connect these two fields of research: formative assessment and teacher education through an analysis of teachers’ conceptions: What do teachers think about assessment? What aims do they pursue through it? Do teachers really distinguish between formative and summative assessment? On the backdrop of the formative assessment literature, the article reports on an exploratory research study. Limitations and issues are analysed in order to shed light on teacher education implication and on future educational research paths in the educational assessment field. 相似文献
44.
Daniele Morciano Anna Fausta Scardigno Amelia Manuti Serafina Pastore 《Educational Research for Policy and Practice》2014,13(1):81-100
In this paper an evaluation study of a public programme financing a regional network of 157 youth centres in the South of Italy is presented. A theory-based evaluation model was adopted to explore the causal links between different types of participation experience. Evaluation questions focused on three main issues are: the perception of empowerment of the team during the management of the centres, the empowering effect of participation in the organization of the youth centres and the decision-making abilities of the young people involved. Following an exploratory study, an on-line structured questionnaire was administered to all centres. New youth centres appear as striving to become sustainable enterprises. However, there is widespread difficulty in terms of integrating day-to-day management with sustainability strategies. Such difficulty appears less pronounced when project leaders participated in the design of the centres together with young people. Results thus confirm participation in the design phase as an empowering experience. This study warns, however, against a number of unwanted effects arising from participation. Indeed, participation processes represented a form of decorative consultation in half of the cases. Empirical evidence therefore suggests further research to focus on the creation of stable participation frameworks inside centres, avoiding the risk of participation processes void of any real effect on decision-making. 相似文献
45.
Massimiliano Ditroilo Roberta Forte David McKeown Colin Boreham Giuseppe De Vito 《Journal of sports sciences》2013,31(15):1675-1682
Abstract Despite its widespread use in performance assessment, the reliability of vertical jump in an ageing population has not been addressed properly. The aim of the present study was to assess intra- and inter-day reliability of countermovement jump in healthy middle-aged (55–65 years) and older (66–75 years) men and women. Eighty-two participants were recruited and asked to perform countermovement jumps on two different occasions interspersed by 4 weeks. The middle-aged groups exhibited excellent absolute reliability for flight height, jump height, peak force, peak power, peak force/body mass, and peak power/body mass, with coefficients of variation ranging from 2.9% to 7.2% in men and from 3.6% to 6.9% in women and moderate-to-high intraclass correlations (0.75 to 0.97 in men; 0.77 to 0.95 in women). The older groups displayed good coefficients of variation (4.2% to 10.8% in men and 3.4% to 9.5% in women), but the intraclass correlations were low-to-high (0.43 to 0.84 in men; 0.42 to 0.93 in women). Overall, intra-session reliability was higher than inter-session reliability. Peak power was by far the most consistent variable, whereas flight and jump height had the most marked variability. The minimum detectable change varied from 10.5% to 33%, depending on the variable examined, suggesting important implications for intervention studies. 相似文献
46.
This paper discusses the extent to which sociodemographic characteristics of consumers and their past consumption are less effective in explaining the decision of purchasing a cultural good than the characteristics of the product itself, which allow for imitative behaviors and are at the basis of distinction. While the former approaches are well documented in the literature, the latter refers to Bourdieu’s idea of objectified cultural capital, which has been revisited and empirically explored. Because the various causal effects interact with each other, this paper tests a theoretical model which matches individual characteristics of the consumer with the properties of the cultural product. Specifically, we discussed the emergence of a new version of a cultural good, which is able to broaden the dimension of the market by gaining rapid success in its audience. This diffusion pattern is a quite rare event, but disruptive for the market and extremely profitable for the producer. The authors label this occurrence a disruptive cultural fad and try to understand the determinants of its adoption. The hypotheses of the model are tested on a unique dataset of microdata of purchasing transactions in Milan in the early nineteenth century, when the music by Gioachino Rossini emerged as a disruptive cultural fad at the dawn of the music industry. Results show that key features of a successful disruptive cultural fad are the role of some specific patterns of personal past consumption, the capabilities of generating positive network externalities in the consumption, and, surprisingly, the lack of negative ones due to any possible hip or snob effect. 相似文献
47.
This paper describes an instructional design class??s experience developing instruction for the mobile web. The class was taught at a southeastern university in the United States in a master??s level computer based instruction course. Two example projects are showcased and student reflections on design issues are highlighted. Additionally, challenges and lessons learned from this experience are described. This case study will benefit those who are considering teaching a course on designing mobile learning; also to those who are considering developing mobile instructional websites. 相似文献
48.
Raymond S. Pastore Alison A. Carr‐Chellman Neal Lohmann 《Performance Improvement Quarterly》2011,23(4):27-48
The purpose of this study was to examine the effects of implementing user design strategies within the corporate culture. Using a case study design approach, this article explores the change process within a Fortune 100 company in which users were given significant decision‐making powers. The main focus is on the unique nature of user design in a corporate environment where users become stakeholders in the process, a very different approach from the more typical top‐down management style. The study found that allowing users to design their own day‐to‐day processes gave them a sense of empowerment in their jobs because they could manage how they worked as long as they were meeting company goals. As a result, users were better able to manage their jobs, solve process‐related problems, and increase efficiency. 相似文献
49.
Chiara Ceccon Maja K. Schachner Francesca Lionetti Massimiliano Pastore Adriana J. Umaña-Taylor Ughetta Moscardino 《Child development》2023,94(5):1162-1180
This registered report evaluated the efficacy of an Italian adaptation of the Identity Project, a school-based intervention promoting adolescents' cultural identity. Migration background and environmental sensitivity were explored as moderators. After adapting and piloting the intervention, a randomized controlled trial was conducted between October 2021 and January 2022 on 747 ethnically diverse adolescents (Mage = 15 years, 53% girls, 31% with migration background) attending 45 classrooms randomly assigned to the intervention or control condition. Bayesian analyses confirmed the efficacy of the Italian IP in enhancing exploration processes (Cohen's d = .18), whereas no cascading effect on resolution emerged. Youth with higher (vs. lower) levels of environmental sensitivity benefited more in terms of exploration. Implications for developmental theory and practice are discussed. 相似文献