Sürdürülebilir Kalkınma Amaçları

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• Elektrik-Elektronik Mühendisliği Bölümü
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Araştırmacılar(175)

• Abca, Tuğba Elbir
• Akaya, Zuhal
• Akbaş, Dilek
• Akçay, Enes
• Akçay, Latif
• Akgül, Halil İbrahim
• Akpınar, Nesimi
• Akpolat, Hacer
• Al-Qado, Ahmed Wasfi Hasan
• Aldemir, Hazal
• Alkan, N.
• Alkay, Zuhal
• Altan, Burhanettin S.
• Altıntaş, Mücahit
• Altun Güven, Sara
• Altuncu, Fatma Kübra
• Altuntas, Serkan
• Alvur, Emre
• Arslaner, Ayla
• Artar, Musa
• Artar, Pınar Tuğçe
• Atalan, Abdulkadir
• Atasbak, Musa
• Avci, Ömer
• Aydın, Gülsüm Merve
• Aydoğan, Ayşe N.
• Aytaş, Reyhan Merve Topçu
• Bacaksız, Efsun
• Balaban, Osman Tolga
• Balci, Murat
• Baluken, Pınar
• Baslar, Mehmet
• Baydaş, Yasemin
• Bayrak, Ömer
• Bayram, Ozkan
• Bekar, Fevzi
• Beşir, Ahmet Burhaneddin
• Bolat, Fevzi Cakmak
• Cakici, Ziya
• Can, Ömer
• Cihan, Ahmet
• Comakli, O.
• Coşkun, Aykut
• Cuce, Erdem
• Cuce, Pinar Mert
• Demirbaş, Fatmanur
• Demirtas, Muhammet
• Demirtaş, Betül
• Dertli, Enes
• Dirikolu, İ.
• Dölek, Muzaffer
• Efe, Şükran
• Efeoglu, Hasan
• Elbir, Tugba
• Engin, M. Alptekin
• Engin, Mustafa Alptekin
• Erbayrak, Engin
• Erdoğan, Ümmügülsüm
• Ergün, Mustafa
• Eroǧlu, Arzu Yaşar

• MakaleYalnız künye2026/r/bayburt/16074
  Çilek Tarlalarındaki Ortam Sıcaklığının Bal Arıları ve Yerli Tozlayıcı Arıların Aktiviteleri Üzerindeki Etkisi

  Erdogan, Ummugulsum; Erdoğan, Yaşar

  Küresel iklim değişikliğine bağlı artan sıcaklıklar, arı aktivite desenlerini ve bitkilerin tozlaşma verimliliğini önemli ölçüde etkilemektedir. Bu çalışmada, ortam sıcaklığının çilek (Fragaria × ananassa) tarlalarındaki bal arıları (Apis mellifera) ve yabani polinatör arı türlerinin aktivitesi üzerindeki etkisi araştırılmıştır. Gözlemler, 12-22°C arasındaki sıcaklık aralıklarında farklı arı türlerinin çiçekleri ziyaret sıklıkları kaydedilerek yapılmıştır. Bulgular, A. mellifera'nın tüm sıcaklık aralıklarında gözlendiğini ve aktivite seviyesinin sıcaklık arttıkça önemli ölçüde arttığını göstermektedir. Yerli türler arasında Lasioglossum spp. ve Halictus quadricinctus daha dar sıcaklık aralıklarında aktifken, Eristalis tenax daha yüksek sıcaklıklarda en yüksek aktivitesini göstermiştir. Genel olarak, bal arıları geniş bir termal toleransa sahipken, yerli arı türleri daha sınırlı sıcaklık aralıklarında faaliyet göstermektedir. Bu sonuçlar, yerli arı topluluklarının iklim değişikliğinin ilerlemesiyle tozlaşma hizmetlerinin azalması riskiyle karşı karşıya olduğunu ve bu türlerin korunmasının tarımsal sürdürülebilirlik için önemli olduğunu göstermektedir.

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• MakaleAçık Erişim2026/r/bayburt/15934
  Impact of Phytobiotic Supplementation Administered in Drinking Water on Meat Quality in Heat-Stressed Broilers

  Kaya, Hacer; Kamiloğlu, Aybike

  This study evaluated the effects of a phytobiotic additive, hawthorn fruit extract (HFE), administered via drinking water on meat quality of broilers subjected to heat stress (HS). A total of 300 one-day-old broiler chicks were distributed into six experimental groups according to a 2×3 factorial design after a one-week acclimation period, with five replicates of 10 chicks each. Chicks had ad libitum access to feed and water for the duration of the 42-day trial and were exposed to a 24-hour lighting program. HS decreased the b* color value of breast meat while increasing L* and a* values and pH of thigh meat. Cooking loss (CL) of both breast and thigh meat was reduced, whereas water-holding capacity (WHC) remained unaffected. HS did not significantly alter thiobarbituric acid-reactive substances (TBARS), total saturated fatty acids (ΣSFA), or total unsaturated fatty acids (ΣUFA), but decreased monounsaturated fatty acids (ΣMUFA) and increased emulsion stability (ES) and polyunsaturated fatty acids (ΣPUFA). Adding HFE to the drinking water did not influence breast meat pH or color intensity, but WHC improved in breast meat with 0.2 mL/L HFE and in thigh meat at both HFE concentrations. The 0.4 mL/L HFE dose increased ΣSFA and decreased ΣUFA and ΣPUFA levels, while ΣMUFA decreased at both HFE concentrations. Overall, HFE supplementation mitigated several adverse effects of HS, notably enhancing ES and reducing redness of thigh meat. These findings suggest that HFE can be an effective phytobiotic strategy to improve meat quality in broilers under thermal stress conditions.

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• MakaleAçık Erişim2026/r/bayburt/14286
  Improvement of machine learning-based diabetes diagnosis via resampling techniques

  Yapici, Irem Senyer; Arslan, Rukiye Uzun; Engin, Mustafa Alptekin

  The objective of this study is to enhance the accuracy of diabetes diagnosis through the utilisation of machine learning techniques and resampling methods. The imbalanced nature of diabetes datasets presents a significant challenge for traditional classification algorithms, which often struggle to accurately predict results. In order to enhance the efficacy of the model, a comparative analysis was conducted to assess the performance of a range of over-sampling and under-sampling techniques, including SMOTE, ADASYN, Borderline SMOTE, SVM SMOTE, Random Under Sampler, Near Miss, One Sided Selection, Neighbourhood Cleaning Rule, Edited Nearest Neighbours, Instance Hardness Threshold, AllKNN and Tomek Links. The aforementioned techniques were then applied to the Decision Tree, Random Forest, K-Nearest Neighbours, AdaBoost, Extra Tree Classifier, and machine learning classifiers, and their performance was evaluated using the accuracy, recall, precision, F-Score, and AUC-ROC performance metrics. The SVMSMOTE resampling technique was identified as the most successful method, achieving 99.06% accuracy when used in combination with the decision tree classifier. The findings demonstrate that the incorporation of resampling techniques markedly enhances diagnostic proficiency and yields more dependable forecasts. This research makes a significant contribution to the field of medical informatics, providing a robust framework for diabetes diagnosis and offering valuable insights into the application of machine learning healthcare.

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• MakaleAçık Erişim2026Scopus SJRQ2/r/bayburt/12820
  Exploring the role of rare earth elements doped TiO₂ based photoanodes on the performance of dye-sensitized solar cells

  Caliskan, Berrak; Sayan, Enes; Igman, Erdal

  This study investigates the synthesis and characterization of rare earth elements (REEs) doped TiO₂ thin films based photoanodes for use in dye-sensitized solar cells (DSSCs). For this purpose, TiO₂ films were doped with Ho³⁺, La³⁺, Er³⁺, and Yb³⁺ ions to enhance photoelectrochemical properties. Characterization techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis spectroscopy, BET surface area analysis, and X-ray photoelectron spectroscopy (XPS) were employed for the structural, morphological, and optical characterization of the synthesized photoanodes and CEs. REEs doping improved the surface morphology and optical properties of TiO₂, in particular, it increased photon absorption in the visible light range. La³⁺ and Ho³⁺ significantly improved photovoltaic performance, achieving power conversion efficiencies of 3.78% and 2.87%, respectively, compared to that of pure TiO₂. These enhancements indicate improved charge transport and light harvesting due to incorporation of REEs. Additionally, replacing the conventional platinum counter electrode (CE) with reduced graphene oxide (rGO) further enhanced performance, offering a low-cost and efficient alternative. The study highlights the combined benefits of REEs doping and rGO integration in improving DSSCs efficiency. These findings contribute to the development of more sustainable, cost-effective solar energy technologies and underline the potential of REEs-doped TiO₂ films and rGO electrodes in advancing next-generation photovoltaic devices.

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  AtıfScopus3·WoS3·OpenAlex2

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• MakaleYalnız künye2026Scopus SJRQ2/r/bayburt/12819
  Comparative investigation of composite-metal lap joints with mono-adhesive and thermoplastic-reinforced mixed adhesive at elevated temperatures

  Erbayrak, Engin; Eker, Beril; Colak, Murat

  This study primarily examines the strength of a single lap joint having a mixed adhesive overlap consisting of a single adhesive and its thermoplastic reinforced state under varying temperatures. In the single lap joint, Titanium-Boron reinforced A356 aluminum was employed as the metal adherend, while plain woven glass fiber-reinforced epoxy (GFRE) was employed as the composite adherend. In the application of the mixed adhesive overlap, the brittle adhesives were employed in the middle section of the lap joint, while the reinforcement of the thermoplastics was employed on the adhesives at both sides of the lap joint. The single lap joints were subjected to tensile tests at 1 mm/min loading rates under room temperature and 120 °C, which is the melting point of the copolyester. In the numerical analysis, the cohesive zone model was applied in order to define the adhesives; however, elastic isotropic and orthotropic material behaviors were employed for the metal and composite adherends, respectively. Eventually, it is determined that the strength of a mixed adhesive lap joint consisting of a single adhesive and its thermoplastic reinforced state is better than a lap joint made with the mono-adhesive alone. Although literature suggests that mixed adhesive overlaps can be formed using at least two different adhesives (one ductile and one brittle), this study demonstrated that a mixed adhesive zone can be created using a single adhesive and thermoplastic reinforcement.

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• MakaleAçık Erişim2026Scopus SJRQ1/r/bayburt/12808
  Development and characterization of postbiotic-enriched biodegradable films with antifungal activity for tomato storage

  Kaya, Yasemin; İspirli, Hümeyra; Bozkurt, Fatih; Sağdıç, Osman; Şengül, Mustafa; Dertli, Enes

  BACKGROUND: One of the major contributors to postharvest losses in tomatoes is the development of infectious mold diseases. In this study, four distinct biodegradable film formulations were developed incorporating postbiotics derived from Lactiplantibacillus plantarum Y48 and the polysaccharide alternan. The formulations included alternan, sodium alginate and glycerol (AAG), alternan, postbiotic, sodium alginate and glycerol (APAG), postbiotic, sodium alginate and glycerol (PAG), and sodium alginate and glycerol (AG) as a control. The films were characterized in terms of their physical, mechanical, thermal, and morphological properties. To assess antifungal efficacy, tomatoes artificially inoculated with Alternaria alternata were coated with each film and stored at ambient temperature for 8 days. RESULTS: The incorporation of alternan and postbiotics enhanced both the mechanical strength and thermal stability of the films. Fourier-transform infrared (FTIR) analysis confirmed the successful integration of the bioactive components into the polymer matrix. Scanning electron microscopy (SEM) imaging revealed that postbiotic addition contributed to a rougher and more rigid surface morphology, while alternan improved the structural cohesion of the films. All film formulations exhibited significant inhibitory effects against A. alternata, with the PAG formulation demonstrating the most pronounced antifungal activity. CONCLUSION: These results suggest that the PAG film, enriched with postbiotics, represents a promising biocontrol strategy for mitigating fungal spoilage in tomatoes. In conclusion, this study underscores the potential of combining postbiotics and alternan for the development of active, biodegradable edible films with antifungal functionality for postharvest preservation.

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  AtıfScopus2·WoS2·OpenAlex3

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• MakaleAçık Erişim2026Scopus SJRQ2/r/bayburt/12804
  Enhanced freshwater production in prism-type solar stills using a fresnel lens system with comprehensive energy-exergy and cost analysis

  Ceviz, Mehmet Akif; Köksal, Hüseyin; Afshari, Faraz; Muratçobanoğlu, Burak

  This study presents the development and performance evaluation of a novel prism-type solar still integrated with a Fresnel lens concentration system designed to concentrate solar radiation on an external spiral heat exchanger. Experimental investigations were conducted under two different saline water flow rates of 0.05 and 0.1 kg/min. The performance of system was comprehensively analyzed in terms of fresh water yield, thermal efficiency, exergy efficiency, and economic viability. The heated saline water and resultant vapor were directed into the prism-shaped condensation chamber, where condensation occurred efficiently. The experimental results demonstrated that lower saline water flow rates led to higher water temperatures and enhanced evaporation rates, thereby increasing freshwater productivity. In contrast, higher flow rates resulted in greater accumulation of saline water within the basin, reducing the evaporation rate and thus lowering overall productivity. The proposed design uniquely combines geometric enhancement via a prism-shaped condensation chamber with solar concentration through a Fresnel lens, enabling a dual-effect improvement in energy absorption and condensation efficiency, an approach not previously reported in the literature for solar desalination systems. The system achieved thermal and exergy efficiencies of 22.95 and 15.50%, respectively, at a saline water flow rate of 0.05 kg/min, producing 92 g of clean water in 60 min. Furthermore, the cost analysis conducted indicated a cost of $0.2546 per liter for this scenario.

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  AtıfScopus1·WoS2·OpenAlex3

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• MakaleAçık Erişim2026Scopus SJRQ4/r/bayburt/12803
  Climate-driven synchronization of honey bee flight activity and plant phenology in Türkiye: development of a Beekeeping Climate Suitability Index (BCSI)

  Erdoğan, Yaşar; Erdoğan, Ümmügülsüm

  Honey bees (Apis mellifera L.) provide essential pollination services that depend on the temporal synchronization between flight activity and plant flowering phenology, both strongly influenced by climatic conditions. However, this relationship remains insufficiently quantified at large spatial and temporal scales. In this study, we quantified climate-driven honey bee flight activity and its alignment with flowering phenology of major nectar plants in Türkiye using ERA5-Land data for the period 1981–2023. Suitable flight days were defined based on temperature (≥12°C) and precipitation (0 mm), and seasonal suitability was evaluated at a monthly scale. A composite Beekeeping Climate Suitability Index (BCSI) was developed by integrating flight activity, flowering overlap and nectar flow window. The number of suitable flight periods ranged between 4 and 7 months (mean ≈5.5), indicating substantial interannual variability. Flight flowering synchrony was low for early-spring species (23–35%) but reached 100% for summer species. BCSI values ranged from 0.44 to 1.00, capturing variability in climatic suitability for beekeeping. These findings demonstrate that climatic variability plays a decisive role in shaping bee plant interactions and provide a quantitative basis for climate-informed beekeeping management.

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• MakaleAçık Erişim2026Scopus SJRQ2/r/bayburt/12780
  Tailoring Physicochemical and Technological Properties of α-Glucans Through Mutations of GTFA from Lactobacillus Reuteri E81

  Gökcan, Hande; İspirli, Hümeyra; Dertli, Enes

  Glucansucrases catalyze the production of α-glucans using sucrose as substrate with distinct physicochemical characteristics originates from mainly the type of linkages, degree of branching and molecular mass. New forms of α-glucans can be produced by applying specific mutations to glucansucrases. In this study, a single and double mutation at Leu933 and Leu935 sites of glucansucrase E81 was applied and L933I and L933I-L935F sites modified glucansucrase was obtained. Structural characterisation of bioengineered α-glucans revealed that ratio of (1 → 3):(1 → 6) linked α-Glc units altered at L933I whereas no (1 → 3)-linked α-Glc units were presented for L933I-L935F modified glucansucrase detected by NMR analysis. Both bioengineered α-glucans had lower molecular weights in comparison to glucan E81 detected by GPC analysis. TGA and DSC analysis were applied to detect the thermal profiles of bioengineered α-glucans whereas FTIR and XRD analysis were applied to determine the alterations in the structural and physical nature of the bioengineered α-glucans, respectively. Finally, SEM and AFM analysis were applied to explore the morphological modifications of the bioengineered α-glucans. This study provides a better understanding for the potential role of final glucan structures on their physicochemical characteristics. Keywords: glucansucrase; carbohydrate engineering; mutation.

  AtıfScopus2·WoS2·OpenAlex2

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• MakaleYalnız künye2026Scopus SJRQ2/r/bayburt/12778
  Experimental investigation on hybrid parabolic trough collector and thermoelectric generator system for energy, economic, and environmental aspects

  Cuce, Pinar Mert; Guclu, Tamer; Cuce, Erdem; Bouabidi, Abdallah; El Hadi Attia, Mohammed

  This study experimentally investigates the thermal and electrical performance, economic feasibility, and environmental impacts of a hybrid energy system integrated with a parabolic trough collector (PTC) and thermoelectric generator (TEG). In the established system, solar energy is converted into electrical and thermal energy using a steam turbine and TEG. Experimental data indicate that the system operates with an average efficiency of 71.44%, which varies depending on the intensity of solar radiation. The overall energy efficiency of the system is calculated as 14.51%. In the economic analysis, the payback period of the designed system is approximately 5.4 years, while the levelised cost of energy production (LCOE) is calculated to be 0.075 USD kWh−1. The environmental assessment indicates that the system can prevent 356.18 kg of CO2 emissions annually and save approximately 1499.72 L of water. These findings demonstrate that hybrid systems offer an economically and environmentally sustainable and efficient alternative to energy production.

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