Papers by Bilge Kaan Atay
Cypriot Journal of Educational Sciences
This research was carried out to measure the academic motivation levels of pre-service music tea... more This research was carried out to measure the academic motivation levels of pre-service music teachers as well as the music performance anxiety levels to investigate potential correlations between them. The sample group of this scanning modelled study is comprised of 241 students studying at departments of music education at Niğde Ömer Halis Demir University, Pamukkale University, Konya Necmettin Erbakan University and Karadeniz Technical University. To determine the demographic features of the students taking part in the study, a demographic information form was used. In order to measure students’ music performance anxiety and academic motivation levels, the data collected using the Music Performance Anxiety Scale and Academic Motivation Scale. The data was analyzed using percentage and frequency distributions. The Pearson Product Moments’ Correlation technique, which is commonly used to calculate the correlation between the variables, was used. As the result of the findings obtai...
TURKISH JOURNAL OF ELECTRICAL ENGINEERING & COMPUTER SCIENCES
Solar energy has become a popular renewable energy source, leading to wide use of photovoltaic (P... more Solar energy has become a popular renewable energy source, leading to wide use of photovoltaic (PV) cells/modules in energy production. For this reason, realistic modeling of PVs and determining the equivalent circuit parameters is of great importance in terms of planning and operation. Hence, in this study, an analytical model for identifying the single-diode equivalent circuit parameters; series resistance (Rs), shunt resistance (Rp), diode ideality factor (a), diode reverse-saturation current (Io), and photon current (Ipv) for PV cells/modules is developed without neglecting any term. In order to test the accuracy of the model, a number of PV modules from different manufacturers are taken into account and the results are compared with those obtained by using such analytical models given in the literature. Current-voltage (I-V) characteristics of the PV modules, which are studied here, are also simulated by comparing with the experimental I-V curves provided by the manufacturers. Results show that the values of the parameters obtained for the PV modules are consistent with those extracted by using other analytical models. In addition, I-V curves created by using the obtained parameters are in full agreement with the experimental data. The curves also show a high degree of compatibility with the ones created by using the optimal parameters of the two-diode models given in the literature. Moreover, the proposed model provides a great advantage in estimating equivalent circuit parameters in terms of ease of use, requirements for input data, dependency on initial conditions as well as considering the parameters which are neglected in such methods given in the literature.
Uploads
Papers by Bilge Kaan Atay