The effectiveness of teaching music in lower grades of primary school depends on competences of pre-service and in-service teachers who have to teach the subject curriculum. During their formal education, student teachers at pedagogical faculties acquire elementary knowledge of the theory of music and didactic-methodical competencies, but the important factor of successful teaching has to be their musical-performing and creative abilities. In this paper we examine the musical and creative abilities of student teachers in the final year of their bachelor studies (N = 48), by analyzing their products within the course of the Methodological Practicum of Music Teaching. Descriptive method and procedure of qualitative analysis of obtained student teachers' products in the field of music creation were used. The results show that student teachers' musical and creative abilities and the quality of their creative products do not exceed the level of curriculum requirements for teaching music in the fourth grade of primary school. The aim of this paper is to determine the level of creativity aptitude of student teachers in order to improve it by adequate methodical procedures and training in order to achieve an optimal level sufficient for developing musical and creative activities in teaching young children in a regular school context. On the basis of the obtained results, it can be concluded that frequent neglect of work in the field of developing children's musical creativity in music teaching practice is connected with teachers' insecurity about their own creative abilities and competencies necessary for teaching music.
This letter presents a Lyapunov function based control strategy for networked control systems (NCS) affected by variable time delays and data loss. A special focus is put on the reduction of the computational complexity. The crucial step to achieving computational efficiency involves defining a specific buffering mechanism that introduces an additional delay not larger than one sampling period. This allows representing the buffered NCS as a switched system, thus leading to a significant simplification of the NCS model and subsequent controller synthesis. The novel approach does not only circumvent the need for any over-approximation technique, but also leads to a strongly decreased number of optimization variables and linear matrix inequalities, allowing hereby greater flexibility with respect to additional degrees of freedom affecting the transient behavior. The performance and computational efficiency of the control strategy are demonstrated in a simulation example. Index Terms-Buffering mechanism, LMI based controller design, networked control systems, time-variable delay and data loss. I. INTRODUCTIONT HE GREAT potential of wireless networked control systems (NCS) characterized by controlling the plant over a (shared) communication channel together with significant developments of communication technologies have moved these systems to the center of attention within many engineering industries. This has been motivated by increasing complexity of modern control systems leading to the rapidly growing interest in characteristics the NCSs possess, such as great flexibility and adaptability regarding the system topology. Nevertheless, the main challenges which arise in NCS are communication constraints such as limited Manuscript
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