Some numerical tests for an alternative approach to optimal feedback control     

Roberto Font  Pablo Pedregal 《Journal of The Franklin Institute》2018,355(15):7011-7026

We test a recently proposed approach to optimal feedback control of nonlinear systems leading to an iterative descending strategy [24]. We start by discussing the numerical implementation of this strategy, and propose a number of improvements that can speed up the computation process by up to two orders of magnitude. The resulting algorithm is then applied to a series of test problems of increasing complexity. Results seem to show that this can be a promising strategy to bear in mind for more realistic situations.  相似文献   

Bullying in Italian schools: the role of perceived teacher unfairness     

Massimo Santinello  Alessio Vieno  Roberto De Vogli 《European Journal of Psychology of Education - EJPE》2011,26(2):235-246

The principal aim of the study is to examine the role of perceived teacher unfairness in predicting bullying behaviour. Data were taken from the “Health Behaviour in School Aged Children” project, a cross-sectional survey investigating health behaviours among early adolescents in selected European countries. Bullying behaviour (bully, victim, and bully/victim), perceived teacher unfairness and others confounding factors were measured through a self-administered questionnaire filled out by a representative sample of 4,386 (48.4% males) Italian students (11, 13, and 15 years old). Covariates included demographic characteristics, socioeconomic status, school performance and other psychological factors. After adjusting for age and gender, teacher unfairness showed a significant association with being a bully (OR = 1.59; CI = 1.40–1.80) and a bully or victim (OR = 1.47; CI = 1.21–1.78). This relationship remained significant after additional adjustment for several potential confounding factors. Results show that characteristics of the school setting such as teacher unfairness can be significant predictors of involvement in bullying behaviour among early adolescents.  相似文献   

天文学家能把星星数完吗?     

GuntherHasinger  青艺龙 《科学中国》2002,(6):45-51

好像每天的报纸都在报道天文学上的新发现:新的天体,新的物理过程,新的物质形式,等等.这种没完没了的发现哪天才到头呢?是否有一天天文学家会自信已经清点完了宇宙的全部资产?  相似文献   

Advanced displays and natural user interfaces to support learning     

Juan-Fernando Martin-SanJose  Ramón Mollá  Roberto Vivó 《Interactive Learning Environments》2017,25(1):17-34

Advanced displays and natural user interfaces (NUI) are a very suitable combination for developing systems to provide an enhanced and richer user experience. This combination can be appropriate in several fields and has not been extensively exploited. One of the fields that this combination is especially suitable for is education. Nowadays, children are growing up playing with computer games, using mobile devices, and other technological devices. New learning methods that use these new technologies can help in the learning process. In this paper, two new methods that use advanced displays and NUI for learning about a period of history are presented. One of the methods is an autostereoscopic system that lets children see themselves as a background in the game and renders the elements in 3D without the need for special glasses; the second method is a frontal projection system that projects the image on a table in 2D and works similarly to a touch table. The Microsoft Kinect^© is used in both systems for the interaction. A comparative study to check different aspects was carried out. A total of 128 children from 7 to 11 years old participated in the study. From the results, we observed that the different characteristics of the systems did not influence the children's acquired knowledge, engagement, or satisfaction. There were statistically significant differences for depth perception and presence in which the autostereoscopic system was scored higher. However, of the two systems, the children considered the frontal projection to be easier to use. We would like to highlight that the scores for the two systems and for all the questions were very high. These results suggest that games of this kind (advanced displays and NUI) could be appropriate educational games and that autostereoscopy is a technology to exploit in their development.  相似文献   

On the use of extended TAM to assess students' acceptance and intent to use third‐generation learning management systems          下载免费PDF全文

Salvador Ros  Roberto Hernández  Agustín Caminero  Antonio Robles  Isabel Barbero  Araceli Maciá  Francisco Pablo Holgado 《British journal of educational technology : journal of the Council for Educational Technology》2015,46(6):1250-1271

Service‐oriented e‐learning platforms can be considered as a third generation of learning management systems (LMSs). As opposed to the previous generations, consisting of ad hoc solutions and traditional LMS, this new technology contemplates e‐learning systems as services that can be integrated into different learning scenarios. This paper shows that the flexibility of these systems allows building personal learning environments and proposes the use of an extended technology acceptance model (TAM) to assess the acceptance and intention to use a third generation of LMS. To fit and validate the service‐oriented e‐learning platforms acceptance model, structural equation modeling and path analysis have been implemented. The results point out that the intention to use this third‐generation LMS is determined by the gadgets and container design, both of which are structural elements of this technology. Finally, it is also shown that previous experience does not determine the use intention of this technology.  相似文献   

Understanding the life cycle of computer-based models: the role of expert contributions in design,development and implementation     

Noemi Waight  Xiufeng Liu  Roberto Ma. Gregorius 《Educational technology research and development : ETR & D》2015,63(6):831-859

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Public research institutions and economic catch-up   总被引：4，自引：0，他引：4  

Roberto Mazzoleni  Richard R. Nelson 《Research Policy》2007,36(10):1512-1528

Public research institutions, often but not always connected with universities, have been in the past important elements of the structures supporting economic catch-up. Recent changes in the international economic environment, and the growing scientific basis for contemporary technologies, will make those institutions even more important in the future. Universities and public labs have contributed to the development of technological capabilities in different forms across countries and economic sectors. In contrast with current emphasis on university-based embryonic inventions and fundamental research, effective research programs have predominantly occurred in the application-oriented sciences and engineering, and have been oriented towards problem-solving, and the advancement of technologies of interest to a well-defined user-community.  相似文献   

Science Letters:Demonstration of a new biosensing concept for immunodiagnostic applications based on change in surface conductance of antibodies after biomolecular interactions     

VASHIST Sandeep Kumar  KAUR Inderpreet  BAJPAI Ram Prakash  BHARADWAJ Lalit Mohan  TEWARI Rupinder  RAITERI Roberto 《Journal of Zhejiang University. Science. B》2006,7(9)

Electrical conductivity in biomolecules and other large polymeric systems has become an important topic of current research. Schlag et al.(2000a; 2000b) demonstrated that charge migration in proteins is highly efficient although the mechanistic origin is still debated and largely unknown even though various models have been proposed by Weinkauf et al.(1995; 1996; 1997). According to them, the charge transfer between amino acids takes place by hole hopping between local sites of lowest ionizati…  相似文献   

Changes in University Governance in France and in Italy     

Boffo  Stefano  Dubois  Pierre  Moscati  Roberto 《Tertiary Education and Management》2008,14(1):13-26

Tertiary Education and Management - The transformation of higher education systems under the pressure of new needs required by the “society of knowledge” in France and Italy has had a...  相似文献   

Qualified Satisfaction: First‐Year Architecture Student Perceptions of Teamwork     

James Thompson  Tarek Teba  Roberto Braglia 《The International Journal of Art & Design Education》2021,40(1):146-164

Across disciplines, skills associated with collaboration are now ubiquitously considered requisite graduate attributes. Despite decades of studies on the various dimensions of academic teamwork, challenges for both students and staff remain. For this year‐long study at a UK school of architecture, we considered teamwork as a thread woven through the first‐year curriculum, traversing course modules and project types. The primary aim of the study was to evaluate the collective impact of teamwork activities on the incoming cohort of 200+ undergraduate students and how the structuring and coordination of such activities might improve the holistic student experience. Across two rounds of online questionnaires and focus group sessions, student participants articulated the benefits of collaboration for learning, socialisation and professional development. However, resentment towards teamwork increased throughout the year, as frustration with disengaged cohort mates grew, and student sought greater structure and oversight from tutors. On the other hand, when given the chance to reflect on the multidimensional nature of teamwork in focus group discussions, many students adopted a productively nuanced perspective toward the topic. This implies that, whether students like or dislike certain aspect of collaborative projects, opportunities for critical conversation can promote or prompt an appreciation for the educational value of including teamwork projects in curricula. The results of this study should be relevant to educators seeking to improve the implementation and effectiveness of team‐based learning, particularly those in design‐based fields and those in higher and professional education contexts.  相似文献