Sürdürülebilir Kalkınma Amaçları
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- MakaleAçık Erişim2025Scopus SJRQ1The impact of photovoltaic panels on the environment and yield parameters in an open field agrivoltaic system: A case study in Ayaş, Ankara
Senturk, Bilge; Oylek, Yelda; Kanar, Zeynep Sevim; Celik, Ridvan; Kurtulus, Gunes; Ozden, Talat
Agrivoltaic systems represent an innovative approach that integrates energy production and agriculture by installing elevated photovoltaic modules over farmland. In this study, the critical parameters on microclimate and microenvironment conditions — soil moisture and temperature, relative humidity, ambient temperature, photosynthetically active radiation, wind speed — and crop yield amount were monitored and analyzed in a single axis tracking AgriPV system installed in Ankara, Türkiye. Results indicate that under the 35 % coverage AgriPV system, photosynthetically active radiation decreased by 38.55 %. Additionally, soil moisture was found to be higher at 20 cm below under the AgriPV system compared to the reference field during the plant growth period. The yield data showed a considerable difference in crop amount under the AgriPV system across different harvest periods. The results are critically important for developing models in future phases that aim to predict and optimize the agricultural and ecosystem performance of AgriPV systems.
AtıfScopus16WoS14OpenAlex12İncele - MakaleAçık Erişim2025Scopus SJRQ2Exploring the Correlation of Physiological Stress Signals with Student Exam Performance: A Preliminary Study
K. Kasap, Ayşegül; Kurt, Burçin
Stress responses in real-world settings are less studied compared to controlled laboratory environments, limiting our understanding of their impact on cognitive performance. This study investigates the relationship between physiological stress signals and academic performance using an open-access dataset of 10 students assessed across three exam sessions (Midterm 1, Midterm 2, and Final Exam). Physiological measures, including electrodermal activity (EDA), heart rate (HR), and skin surface temperature (TEMP), along with exam grades, were analyzed using traditional hypothesis testing, bootstrap method, correlation analysis, and regression tree modeling. To address the small sample size, we validated traditional hypothesis test results with the bootstrap method, and both approaches were compatible. Hypothesis testing revealed no significant differences in physiological measures across exam sessions, supporting the null hypothesis. Grades differed significantly between the final exam and both midterms (p < 0.05). Stress fluctuations were also analyzed across three periods (beginning, middle, and end) for each exam, revealing temporal response variations. Correlation analysis showed a moderate negative relationship between EDA and HR (r = − 0.504, p < 0.01) and a weak positive relationship between EDA and TEMP (r = 0.417, p < 0.05), both intensifying during the final exam. Regression analysis explained 78% of the variance in grades (R2 = 0.78), with regression tree modeling identifying lower skin temperature (< 28 °C) and higher EDA (≥ 0.19) as predictors of poorer performance. These findings underscore the interplay between physiological stress responses and academic outcomes, emphasizing the need for further research and interventions to support student success.
AtıfScopus8WoS4OpenAlex5İncele - Yüksek Lisans TeziAçık Erişim2019Gümüşhane ve civarının afet geçmişi ve gelecek deprem potansiyeli üzerine istatistiksel bir çalışma
Aynur Kaya
Bu çalışma kapsamında, Gümüşhane'nin afet geçmişi araştırılmış ve Gümüşhane ve civarındaki deprem oluşumlarının bölge-zaman-magnitüd davranışları analiz edilerek gelecek deprem potansiyeli üzerine istatistiksel bir değerlendirme yapılmıştır. Bu amaçla, tamlık magnitüdü Mc-değeri, sismotektonik b-değeri, fraktal boyut Dc-değeri, standart normal sapma Z-değeri, GENAS modellemesi, depremlerin yıllık olasılıkları ve tekrarlama periyodları gibi en sık tercih edilen boyut-ölçeklendirme parametreleri kullanılmıştır. Deprem kataloğu süre magnitüdü Md için homojendir ve 1970-2018 yılları arasında magnitüdleri 1,0≤Md≤6,5 arasında değişen 2902 depremi içermektedir. Mc=2,8 kullanılarak b-değeri 1,02±0,02 olarak hesaplanmıştır ve bu değer, Gümüşhane ve civarındaki depremselliğin tipik olarak 1,0'e yakın bir değerle iyi temsil edildiğini gösterir. Dc-değeri 1,57±0,03 olarak hesaplanmıştır ve bu sonuç, deprem aktivitesinin Gümüşhane ve civarında büyük ölçeklerde veya küçük alanlarda daha fazla kümelendiği anlamına gelmektedir. Depremlerin yıllık olasılıkları ve tekrarlama periyodları, Gümüşhane'nin kısa ve orta vadede güçlü deprem oluşumları için önemli bir deprem potansiyeline sahip olmadığını göstermektedir. Bununla birlikte, düşük b-değerlerinin gözlendiği Kelkit ve Köse ilçeleri gelecekte olası bir deprem potansiyeline sahip olabilir. GENAS sonuçları ve Z-değeri analizleri, 2018 yılı başında depremsellik oranlarında önemli değişimlerin olmadığını ortaya koymuştur. Dolayısıyla, Türkiye'nin Gümüşhane ilinde deprem tehlikesi düşük ve deprem riski azdır. Sonuçta, deprem oluşumları için bölge-zaman-magnitüd dağılımları üzerine yapılan bu tür istatistiksel değerlendirmeler, gelecek deprem potansiyelinin belirlenmesinde önemli bir bakış açısı sağlayabilir.
- MakaleYalnız künye2014Evaluation of Ground Snow Loads in Turkish Codes Via Statistical Analysis of Turkey Snow Data
Durmaz, Mustafa; Daloglu, Ayse
In Turkey many roofs exposed to snow loads exceeding the design snow loads are damaged or collapsed. Roof snow load specified for structural design in Turkish codes is calculated as the product of a ground snow load multiplied by the conversion factors that depend on the roof properties. In this study, the ground snow loads in Turkish codes are evaluated via statistical analysis of Turkey snow data obtained from 92 Turkish State Meteorological Service stations. The probability plot correlation coefficient test for Gumbel, lognormal and Weibull distributions are used to determine the best fit of the probability distribution considering the snow data. 50-year design ground snow loads and snow depths of the stations determined by using the selected distributions are compared to those proposed in Turkish codes. It is concluded that TS 498 is unsafe for Eastern Black Sea and Eastern Anatolia regions and Gumbel distribution used in TS 7046 does not represent half of the snow data.
- MakaleYalnız künye2012Scopus SJRQ1Soil geochemical prospection for gold deposit in the Arzular area (NE Turkey)
Yaylali-Abanuz, Gülten; Tüysüz, Necati; Akaryali, Enver
The Arzular gold mineralization is located at the southern part of the Black Sea Tectonic Unit in northern Turkey. This belt hosts several high-potential epithermal gold deposits and it is highly probable that there are a number of undiscovered occurrences in the region. The presence of intensely altered areas, suitable structural elements and acidic intrusions indicates that the region has an important potential for epithermal gold. Soil geochemistry surveys are widely used for the exploration of buried mineral deposits. In this work the applicability of soil geochemistry surveys for exploration of buried mineral deposits was tested using various statistical methods. In this respect, concentrations of 16 elements have been assayed in about 50 soil samples collected from the Arzular area. Soil samples were taken from the B horizon. The data revealed elevated concentrations for gold (0.20-259.2 μg/kg), silver (23-26,972 μg/kg), arsenic (1.7-301.8. mg/kg), copper (54.09-170.7. mg/kg), zinc (5.1-261.3. mg/kg) and lead (2.6-385.45. mg/kg). Gold is significantly correlated with elements such as Sb, Cd, Pb, Ag, As, Cu and Mo. Relatively high anomaly contrasts between Au, As, Ag and Sb and their coinciding anomalies along an E-W trending fault at the eastern part of the field might indicate that As, Ag and Sb could be used as a pathfinder element for exploration of gold deposits. Factor analysis was applied to elements in soil samples and then distribution diagrams were prepared using the factor scores obtained. In a distribution diagram for mineralization-associated factor score, two anomaly fields along the E-W trending fracture line and one anomaly field at the eastern part were distinguished. The largest anomaly in an ellipsoidal shape with long axis of 350. m was obtained from the southeast part of the area. Anomaly patterns show that factor scores might yield suitable and net results for the exploration. NE-SW trending fracture system is not related to mineralization and is younger than E-W trending fracture line. However, the E-W trending fault system controls the mineralization; therefore, the eastern extent of this fault zone needs to be investigated.
AtıfScopus19WoS16OpenAlex20İncele