Učitelj – refleksivni istraživač u praksi

The needs of modern society set before teachers some new requirements with regard to the teacher\u27s changed role. Teachers are ceasing to be agents transferring knowledge and are becoming persons who diagnose and organize the research process. As a starting point in the discussion, we have analyzed the correlation between the methodological training of teachers in the model of the reflective practitioner and in the model of educating the teacher - researcher. Likewise, the paper has analyzed teachers\u27 positions on knowledge, skills and potentials needed for the study and promotion of educational practice, viewed against: the length of professional service, the knowledge and use of a foreign language, the school environment, the length of undergraduate study and the grade point average during this study. The goal of the research is to initiate practical changes which would bring about expected results in terms of promoting educational practice. The research pooled 390 Serbian primary school teachers. The results have shown that knowledge of the methodology of pedagogical research (construction and use of instruments, project and research implementation) is perceived as most indispensable for the promotion of educational practicePotrebe suvremenoga društva pred učitelje postavljaju neke nove zahtjeve s obzirom na promijenjenu ulogu učitelja. Učitelji prestaju biti prenositelji znanja i postaju dijagnostičari i organizatori procesa istraživanja. Kao polazna točka u raspravi analiziran je odnos između metodičkoga obrazovanja učitelja u modelu refleksivnog praktičara i u modelu izobrazbe učitelja - istraživača. U radu su također analizirani i stavovi učitelja o znanju, vještinama i mogućnostima potrebnima za proučavanje i razvoj odgojno-obrazovne prakse s obzirom na: godine rada u struci, znanje i korištenje stranoga jezika, školsku sredinu, duljinu dodiplomskog studija i prosjek ocjena tijekom studiranja. Cilj istraživanja je potaknuti praktične promjene koje bi dovele do očekivanih rezultata u smislu poboljšanja obrazovno-odgojne prakse. Istraživanje je obuhvatilo 390 učitelja u osnovnim školama u Srbiji. Rezultati su pokazali da se znanje o metodama pedagoškog istraživanja (izrada i korištenje instrumenata, provođenje projekata i istraživanja) smatra neophodnim za razvoj i unapređenje odgojno-obrazovne prakse (p<0.001)

Učitelj – refleksivni istraživač u praksi

The needs of modern society set before teachers some new requirements with regard to the teacher\u27s changed role. Teachers are ceasing to be agents transferring knowledge and are becoming persons who diagnose and organize the research process. As a starting point in the discussion, we have analyzed the correlation between the methodological training of teachers in the model of the reflective practitioner and in the model of educating the teacher - researcher. Likewise, the paper has analyzed teachers\u27 positions on knowledge, skills and potentials needed for the study and promotion of educational practice, viewed against: the length of professional service, the knowledge and use of a foreign language, the school environment, the length of undergraduate study and the grade point average during this study. The goal of the research is to initiate practical changes which would bring about expected results in terms of promoting educational practice. The research pooled 390 Serbian primary school teachers. The results have shown that knowledge of the methodology of pedagogical research (construction and use of instruments, project and research implementation) is perceived as most indispensable for the promotion of educational practicePotrebe suvremenoga društva pred učitelje postavljaju neke nove zahtjeve s obzirom na promijenjenu ulogu učitelja. Učitelji prestaju biti prenositelji znanja i postaju dijagnostičari i organizatori procesa istraživanja. Kao polazna točka u raspravi analiziran je odnos između metodičkoga obrazovanja učitelja u modelu refleksivnog praktičara i u modelu izobrazbe učitelja - istraživača. U radu su također analizirani i stavovi učitelja o znanju, vještinama i mogućnostima potrebnima za proučavanje i razvoj odgojno-obrazovne prakse s obzirom na: godine rada u struci, znanje i korištenje stranoga jezika, školsku sredinu, duljinu dodiplomskog studija i prosjek ocjena tijekom studiranja. Cilj istraživanja je potaknuti praktične promjene koje bi dovele do očekivanih rezultata u smislu poboljšanja obrazovno-odgojne prakse. Istraživanje je obuhvatilo 390 učitelja u osnovnim školama u Srbiji. Rezultati su pokazali da se znanje o metodama pedagoškog istraživanja (izrada i korištenje instrumenata, provođenje projekata i istraživanja) smatra neophodnim za razvoj i unapređenje odgojno-obrazovne prakse (p<0.001)

Average Bit Error Rate at Signal Transmission with OOK Modulation Scheme in Different FSO Channels

In this paper, the Average Bit Error Rate of the signal in the Free Space Optical system modulated with On-Off keying scheme is calculated and analysed. The Average Bit Error Rate is determined in the case of an atmospheric channel modelled with Gamma-Gamma distribution, Log-Normal distribution, K distribution and I-K distribution. The results are presented both analytically and graphically for different lengths of the Free Space Optical link and the strength of the atmospheric turbulence. The quality of the received signal based on the Average Bit Error Rate for weak, moderate and strong atmospheric turbulences, different lengths of the transmission section and different Signal-to-Noise Ratio values was analysed. The operation of the Free Space Optical system in the observed environment was simulated and the transmission quality was analysed based on Bit Error Rate and Q factor

PERFORMANCE OF MACRO DIVERSITY WIRELESS COMMUNICATION SYSTEM OPERATING IN WEIBUL MULTIPATH FADING ENVIRONMENT

In this paper, we consider wireless mobile radio communication system with macro diversity reception. Signal is subject to Weibull small scale fading and Gamma large scale fading resulting in system performance degradation. Receiver uses macro diversity selection combining (SC) technique in order to reduce the impact of long term fading effects, and two micro diversity SC branches are used to mitigate Weibull short term fading effects on system performance. Probability density function (PDF), and cumulative distribution function (CDF), as well as level crossing rate (LCR) and average fade duration (AFD) of the SC receiver output signal envelope are evaluated. The obtained expressions converge rapidly for all considered values of Weibull fading parameter and Gamma shadowing severity parameter. Mathematical results are studied in order to analyze the influence of Weibull fading parameter and Gamma shadowing severity parameter on statistical properties of the SC receiver output signal

Performance Analysis of SSC Diversity Receiver over Correlated Hoyt Fading Channels

An infinite-series-based approach for the performance analysis of a dual-branch switched-and-stay combining (SSC) diversity receiver operating over correlated Hoyt fading channels is presented. The performance analysis is based on outage probability (Pout) and average bit error probability (ABEP) criteria. More precisely, the ABEP performance is evaluated for binary differential phase-shift-keying (BDPSK) and binary non-coherent frequency-shift keying (BNFSK) modulation schemes. Derived analytical expressions are easily computable and fast converging, which provides a significant improvement in calculation speed. Obtained numerical results corresponding to different fading channel conditions are graphically illustrated and analyzed