Las relaciones con los iguales

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COMPUTER MODELLIG AD SIMULATIO – MEAS OF

ICREASIG DEGREE OF ILLUSTRATIO (BEYOD

ATURAL LIMITS) OF THE EXISTIG WAYS OF

VISUALIZATIO I TEACHIG ELECTROTECHICS?

POČÍTAČOVÉ MODELOVANIE A SIMULÁCIA – PROSTRIEDOK PRE ZVÝŠENIE STUPŇA NÁZORNOSTI VO VÝUČBE ELEKTROTECHNIKY?

Milan BERÁT

Resumé: This papers brings some practical result of our research whose aim was to

elaborate a system of teaching electro-technical vocational subjects and a “know how” of its using which would enable to more illustratively visualize some electro-physical processes running beyond visualization framework that cannot be achieved through the traditional visualization. As a visualization medium for the experimental way of visualization, we have used an interactive graphical computer animation and simulation models of some electro-physical systems created in the Visual Basic environment. (We have created over 200 pieces of original interactive simulation teaching computer models intentionally created for needs of particular teaching topics).

Kľúčové slová: počítačové modelovanie fyzikálnych systémov, výučba elektrotechniky. Key words: computer simulation and animation electro-physical systems.

Introduction to the examined issues and analysis of the current state of their research cognition

By visualization we understand a visual, visually perceived, picture delivery [2]. Until recently, dynamics of some electromagnetic processes running in electro-physical systems could only be visualized for didactic purposes on the basis of traditional ways of visualization - i.e. only on the basis of electric measuring in real electro-physical systems - or virtually on the basis of animation using video technology (including static didactic picture or overhead transparencies).

In terms of didactics, a drawback of the first mentioned way of visualization – the visualization through electro-physical measuring – causes in fact the impossibility to decelerate, accelerate, stop, or run the processes for didactic purposes. A drawback of the second traditional way of visualization (the visualization on the basis of video- animation) causes the impossibility to actively - interactively enter the process of visualization, thus the impossibility to change the visualized system parameters or the linear sequence order. On the other hand, however, an indisputable advantage of the above-mentioned traditional visualization through electric measuring is its usefulness and pragmatic practicality.

Introduction of information technology provides remarkable possibilities for computer simulation and animation and for its application in education and these were for us the source of creation of a new quality visualization platform

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Research aim formulation

The main aim of our research – focusing on the application of electro-physical system computer modelling in teaching – is to create and verify in real practice of school an innovative system of teaching, whose innovative base is visualization of electro-physical process dynamics for the purpose of teaching by the application of interactive graphic animation and simulation computer models (of electric circuits and electromagnetic fields) in symbiosis with the traditional school demonstrative set in teaching related to electromagnetism. This electro-physical system is known in its acronymic form as NIESVE. Thus, hereinafter the NIESVE will mean the proposed innovative experimental system of teaching related to electro-physics.

Our strategy and tactics in the approach to the innovative activity in the monitored area is based on the fact that the innovative base (created by the above innovative way of visualization in symbiosis and in mutual complementation with the traditional main ways of visualization of electro-physical process in knowledge acquisition) creates possibilities to broaden one’s horizons and the operating range of the traditional ways of visualization effect (beyond their natural limits) by employing new possibilities, which the innovative way of visualization (unlike the traditional one) has. In terms of the theory of the process of cognition, it is a cooperation of interactive cognition through information technology and direct cognition via real school experiment in our current school conditions

Principles, strategy, and tactics of the creation of visualization platform as applied in the IESVE

I. The first pillar of creation: The basis of the strategy and tactics of the approach to our innovation proposal of the current systems of teaching electro-physics – and also the main aim of our research – is not to suppress the approved in practice and didactically well-elaborated traditional teaching systems and replace them by new ones, just the contrary contrary, to retain them and organically enrich them with new innovative elements. Thus, the objective is to broaden the horizons and the operating range of traditional teaching systems effects beyond their present limits by employing new possibilities, which the innovative systems have, but which the traditional are lacking. It is basically a symbiosis of the traditional and innovative teaching systems, which limits or eliminates the impact of drawbacks and strengthens the advantages of the both of the types.

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II. The second pillar of creation: Eventually, the aim of the NIESVE creation in teaching electrical engineering (should this appear useful) is to possibly extent the “hand of cognition”, (to show more) than the traditional visualization forms have enabled us (e.g. through electro-technical construction kit).

III. The third pillar of creation: „The principled essence” of the difference between the experimental and the traditional ways of visualization of electromagnetic processes (specified in the introduction and used in our research) is that the traditional way of visualization was using “static” techniques of electro-physical system visualization (of electric scheme – as traditionally printed) and the experimental way of visualization was furthermore using “dynamic” visualization techniques (computer modeling and simulation through educational interactive animation and simulation computer models and their results presented by computer graphics). See Fig. 2, 3, where the essence of the difference between the experimental and the traditional ways of visualization (of the same electro-physical system) explained by way of example of the visualization of electromagnetic processes of the lift operation control, flat electric installation, … .

Fig. 2 The essence of the difference between the experimental and traditional way of visualization of the same electro-physical system

Conclusion

Based on the synoptic analysis of applicability of the innovative teaching system (created on the basis of innovative way of teaching), which has been described and experimentally tested, it can be stated that the research has proved that it is possible to apply the innovative system in practice of our current school, and thus create the conditions for increasing effectiveness of education of electro-physics and achieve positive qualitative changes in the structure of learners´ knowledge.

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Fig. 3 The traditional and the experimental ways of visualization of the same electro- physical system (overhead transparency and educational interactivesimulation computer

model) - distribution of electricity in the flats

References

(1) BERNÁT, M. Dynamika priestorových nábojov v nehomogénnych elektrických poliach vytvorených jednosmerným a striedavým napätím. Dizertačná práca. Košice: FEI TU Košice, 2000. ISBN nemá.

(2) BERNÁT, M. K didakticky zameranej vizualizácii niektorých elektrofyzikálnych procesov pomocou počítača a jej aplikácie vo výučbe elektrofyzikálnej zložky učiva spätej s technickou výchovou. Dizertačná práca. Nitra: PdF UKF Nitra, 2005. ISBN nemá.

(3) MILLY, M. Rozšírenie symbolicko-komplexnej metódy pre neharmonické periodické signály. In: Zborník (na CD-ROM a na WEB-e) „Učiteľ prírodovedných predmetov na začiatku 21. storočia“. Prešov: FHPV, s. 325-329, ISBN 80-8068-462-6.

Oponoval: Ing. Jozef Balogh, PhD. (FEI TU Košice)

Kontaktná adresa

Ing. Milan Bernát, PhD.,PhD. Katedra techniky a DK

Fakulta humanitných a prírodných vied PU v Prešove Ul. 17. novembra 1

080 01 Prešov, Slovenská republika Tel.: 00421 517470250

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REDISCOVERY OF THE AALOGY METHOD I ATURAL

SCIECE AD TECHICAL EDUCATIOS I COECTIO

WITH THE CREATIO OF EDUCATIOAL AIMATIO AD