Comparative study of the evaluation of professional competencies by experienced and trainee Spanish primary teachers     

A. De Juanas Oliva  P. Fernández Lozano  R. Martín del Pozo  M. González Ballesteros  E. Pesquero Franco  E. Sánchez Martín 《欧洲师范教育杂志》2009,32(4):437-454

Taking as reference the proposals of the European Higher Education Area, the aim of this study is to identify the competencies which a wide sample of teachers in Spanish primary schools (6–12 age group) consider to be important for their professional performance and which they use in their everyday teaching, and to what extent their university training prepared them for their practising professional development. To do this, an ad hoc instrument was devised and applied to experienced practising teachers and to teacher trainees who were on teacher training placements during the last semester of their course. The results of the study show that initial teacher training should deal in depth with the competencies related to the organisation and management of teaching–learning, the use of new technologies in the primary classroom, the involvement of the families, education in values, social skills and skills for working in professional groups. Finally, proposals are made for training based on the articulation between theory and practice, to allow the professional competencies mentioned to be developed and used in practice, as well as encouraging close collaboration between teacher trainers and experienced practising teachers.  相似文献   

The role of contextual,conceptual and procedural knowledge in activating mathematical competencies (PISA)     

César Sáenz 《Educational Studies in Mathematics》2009,71(2):123-143

This paper analyses the difficulties which Spanish student teachers have in solving the PISA 2003 released items. It studies the role played by the type and organisation of mathematical knowledge in the activation of competencies identified by PISA with particular attention to the function of contextual knowledge. The results of the research lead us to conclude that the assessment of the participant’s mathematical competencies must include an assessment of the extent to which they have school mathematical knowledge (contextual, conceptual and procedural) that can be productively applied to problem situations. In this way, the school knowledge variable becomes a variable associated with the PISA competence variable. This paper is based on a research project funded by a grant awarded in 2003 by the General Directorate for Research of the Spanish Ministry of Education and Science (BSO-2003-7133).  相似文献   

Online partitioning method for decentralized control of linear switching large-scale systems     

Wicak Ananduta  Tomás Pippia  Carlos Ocampo-Martinez  Joris Sijs  Bart De Schutter 《Journal of The Franklin Institute》2019,356(6):3290-3313

A novel partitioning approach for linear switching large-scale systems is presented. We assume that the modes of the switching system are unknown a priori but can be detected. We propose an online partitioning scheme that can partition the system when the mode switches, thus adapting the partition to the mode. Moreover, after the system has been partitioned, we apply a decentralized state-feedback control scheme to stabilize the system. We also apply a dwell time stability scheme to prove that the closed-loop system remains stable even after both the mode and partition changes. The proposed approach is illustrated by means of an automatic generation control problem related to frequency deviation regulation in a large-scale power network.  相似文献   

Circular formation control for cooperative target tracking with limited information     

Lara Briñón-Arranz  Alexandre Seuret  António Pascoal 《Journal of The Franklin Institute》2019,356(4):1771-1788

This paper addresses the problem of encircling and tracking a moving target with a fleet of unicycle-like vehicles. A new control law is developed to steer the vehicles to an evenly spaced formation along a circumference, the center of which tracks the motion of the target. The strategy proposed relies only on the relative positions of the agents with respect to the target, expressed in the local frame of each vehicle. The absolute position, velocity and acceleration of the target are unknown. Additionally, the robustness of the proposed control law in the presence of external disturbances is analyzed. Communication among agents is used to maintain the vehicles equally spaced in the circular formation. Simulation results illustrate the effectiveness of the proposed strategies.  相似文献   

Detection of replay attacks in cyber-physical systems using a frequency-based signature     

Helem Sabina Sánchez  Damiano Rotondo  Teresa Escobet  Vicenç Puig  Jordi Saludes  Joseba Quevedo 《Journal of The Franklin Institute》2019,356(5):2798-2824

This paper proposes a frequency-based approach for the detection of replay attacks affecting cyber-physical systems (CPS). In particular, the method employs a sinusoidal signal with a time-varying frequency (authentication signal) into the closed-loop system and checks whether the time profile of the frequency components in the output signal are compatible with the authentication signal or not. In order to carry out this target, the couplings between inputs and outputs are eliminated using a dynamic decoupling technique based on vector fitting. In this way, a signature introduced on a specific input channel will affect only the output that is selected to be associated with that input, which is a property that can be exploited to determine which channels are being affected. A bank of band-pass filters is used to generate signals whose energies can be compared to reconstruct an estimation of the time-varying frequency profile. By matching the known frequency profile with its estimation, the detector can provide the information about whether a replay attack is being carried out or not. The design of the signal generator and the detector are thoroughly discussed, and an example based on a quadruple-tank process is used to show the application and effectiveness of the proposed method.  相似文献   

Intellectual property rights,trade agreements,and international trade     

Mercedes Campi  Marco Dueñas 《Research Policy》2019,48(3):531-545

The global process of strengthening and harmonization of intellectual property rights (IPRs) systems has been intensified in the last twenty five years by the signing of trade agreements (TAs) that include chapters with intellectual property (IP) provisions and other trade-related issues. This paper provides a first exploration of whether and how the signing of TAs with IP chapters influences bilateral trade flows for a balanced panel of 110 countries and the period 1995–2013. We address methodological issues related to the assessment of the effect of TAs on bilateral trade. We use matching econometrics to evaluate the treatment of TAs with and without IP chapters. In addition, we estimate the effects of TAs on bilateral trade in a more dynamic fashion using a panel data approach based on the gravity model. Also, we perform our analysis for trade in low- and high-IP intensive products. We found that both types of TAs increase bilateral trade but TAs with no IPRs chapters have a stronger positive effect on trade. However, if we include lags to consider that TAs with IP chapters might need a longer implementation time, the net expected increase on trade is similar for both types of TAs. We also found that the effects depend on the development level of countries and on the IP intensity of products. We found a clear positive effect for developed countries, but we do not observe important gains for developing countries in all sectors and to all destinations derived from TAs with IP chapters. This raises the question of whether trade gains can compensate the effort related with IP reforms.  相似文献   

Knowledge-intensive consumer services. Understanding KICS in the innovative global health-care sector     

Cátia Miriam Costa  Sandro Mendonça 《Research Policy》2019,48(4):968-982

This paper explores a case of knowledge-intensive consumer services (KICS). Services have become less neglected in the economics of technical change and innovation studies in general; nevertheless, the advance of this agenda has been uneven. A significant emphasis has been on knowledge-intensive business services (KIBS). Despite their direct impact on social needs and individual desires, innovation in consumer-oriented services continues to be relatively under-theorized and under-researched. This paper brings into focus the sources and patterns of innovation in those innovative services that target human satisfaction and well-being as a final goal. We show evidence from a little-explored health industry, oral care. We address Malo Clinic, a company specialized in the most complex patient situations and a rare instance of an internationalized firm in the health services business. On the basis of a 20-year thread of corporate history, we find that a wide array of qualitative (interviews, newspaper coverage, marketing material) and quantitative evidence (papers, patents, trademarks) illuminates some of the features that may characterize a particular class of dynamic activities tending to consumers’ needs, expectations and quality of life. We argue that these key characteristics may be on course to become more general as the learning economy spreads to fully embrace the realm of the service sphere. One conclusion is that both the technological and non-technological capabilities underpinning more types of innovation are increasingly becoming coupled in consumer-relevant services.  相似文献   

Rotary inverted pendulum with magnetically external perturbations as a source of the pendulum’s base navigation commands     

Gisela Pujol-Vazquez  Leonardo Acho  Saleh Mobayen  Amelia Nápoles  Vega Pérez 《Journal of The Franklin Institute》2018,355(10):4077-4096

The main objective of this paper is to drive a rotary inverted pendulum by following a desired navigation instruction. This navigation is commanded by the user through a new electromagnetic device which is allowed to perturb the pendulum from its upright position. This apparatus consists of an electronic magnetic driving circuit to introduce commands and realized via two operated magnetic coils. So, the external programmed magnetic perturbation can be seen as external commandments. Therefore, the control problem statement is solved via a modified regulation control implementation, to maintain the pendulum on its upright position and giving free manipulation of the base of the rotary inverted pendulum. Hence, by using the corresponding H_∞-linear matrix inequality technique, a static state controller is designed and tested experimentally so supporting our findings.  相似文献   

A numerically robust blind equalization scheme applied to MIMO communication systems     

Flávio R.  M. Pavan  Magno T.  M. Silva  Maria D. Miranda 《Journal of The Franklin Institute》2018,355(1):596-624

In this paper, we propose a numerically robust blind equalization scheme to mitigate cochannel and intersymbol interferences and separate signals from a convolutive mixture in multiple-input multiple-output (MIMO) communication systems. The robustness of the proposed scheme is achieved through a particular dual-mode operation applied to a constant-modulus-based space-time algorithm that corrects phase rotations. In the first mode of operation, the consistency in the nonlinear estimates of the transmitted signals is ensured. In the second mode, the Euclidean norms of the equalizer coefficient vectors decrease along the iterations, which allows the algorithm to return to the first mode of operation, where the estimation of the transmitted signals really occurs. In particular, we apply this scheme to a multimodulus version of the multiuser Shalvi-Weinstein algorithm (MU-SWA). By means of a deterministic stability analysis assuming the persistence of excitation condition, we show that the dual-mode MU-SWA does not diverge.  相似文献   

Assessing perceived need support and need satisfaction in physical education: adaptation and validation with English students     

David Sánchez-Oliva  Florence-Emilie Kinnafick  Nathan Smith  Andreas Stenling 《Measurement in physical education and exercise science》2018,22(4):332-342

This study aimed to validate an English version of Basic Psychological Needs Support Questionnaire (BPNSQ) and the Basic Psychological Needs in Physical Education Scale (BPN-PE) in the physical education context. Participants included 453 students aged between 12 and 17 years. For the BPNSQ, the hypothesized three-factor solution displayed high interfactor correlations (rs > 1), and a follow-up analysis indicated that the items were represented by a single need-support factor. For the BPN-PE, hypothesized three-factor solution was supported. Both scales were found invariant across gender, and the nomological validity was also demonstrated through the associations between factors of both scales. This study provides initial support for the use of the BPN-PE to assess psychological need satisfaction within the physical education context among English-speaking adolescents. The hypothesized three-factor structure of the BPNSQ was not supported and more research is needed to evaluate the English version in the physical education context.  相似文献