Kırşehir Ahi Evran Üniversitesi Kurumsal Akademik Arşivi
DSpace@Kırşehir, Kırşehir Ahi Evran Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve yayınların etkisimi artırmak için telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Quantum Transport in DNA Modulated by A Schiff Base Ligand: The Role of Binding and Electronic Structure Changes from DFT–NEGF–MD Simulations
(Elsevier Inc., 2026) Karakurt, Tuncay; Çukurovalı, Alaaddin; Mohammad, Hashem; Yilmaz, Ibrahim
[Not Abstract Available]
Correlatıon of Sand Fabrıc and Constraıned Elastıc Modulus (Ec)
(Czech Academy of Sciences, 2025) Çellek, Seda
The Constrained Modulus of Soil (Ec) is a key parameter for assessing soil compressibility and calculating consolidation settlements. The Ec values obtained from laboratory and in-situ tests are influenced by various factors. This study investigates the variations in Ec with respect to selected sample characteristics. To this end, four sand samples were utilized: three of marine origin and one collected from a riverbed. Only clean sands were considered in the testing program. In order to evaluate the influence of mineralogy, the samples were chosen to represent magmatic, metamorphic, and sedimentary origins. Their mineralogical compositions were identified through X-Ray Diffraction (XRD) analyses. To better examine the effects on the elastic modulus, loose specimens representing shallow deposits and dense specimens representing deeper layers were prepared. Accordingly, the physico-mechanical properties of the sands were also determined. The metamorphic sand, rich in mica, exhibited the lowest specific gravity (2.74) and the highest void ratio, whereas the magmatic sand containing iron compounds showed the highest specific gravity (3.44) and the highest minimum void ratio. In this study, oedometer tests were conducted on sand specimens prepared at different relative densities under applied stresses of 200, 400, 800, 1600, and 3200 kPa, and the Constrained Modulus (Ec) values were calculated. The experimental results indicated that the sands exhibited similar behavior up to 3200 kPa, but differences emerged at this stress level. The lowest Ec values were obtained in sands with high mica content. The findings reveal that the genetic and mineralogical differences of sands have a significant influence on the constrained modulus.
Effect of Some Factors on Fertility and Milk Yield Traits of Simmental Cattle Raised in Teke Region of Türkiye
(Hellenic Veterinary Medical Society, 2025) Öztürk, Yahya; Sarı, Mehmet
This study was conducted to determine the effects of some factors on the fertility and milk yield traits of Simmental breed cattle raised with different production scales in Teke Region. The research data includes 635 lactation records of Simmental cows raised in Antalya, Burdur, Denizli, and Isparta provinces between the years of 2011 and 2017. Based on these data, the effects of factors such as enterprise scale, lactation number, season, calving year, and province on fertility and milk yield were analyzed. It was determined that the farm scale, calving year, and calving season significantly affected the fertility traits of calving interval and service period (P<0.05). Also, it was detected that lactation number affected the number of inseminations per pregnancy (P<0.05). Province significantly affected lactation length, 305-day milk yield, lactation milk yield, and drying period (P<0.05). Enterprise scale significantly affected 305-day milk yield and lactation milk yield (P<0.05). Calving year affected lactation length, lactation milk yield, and drying time (P<0.05) (P<0.05). According to findings, there were significant relationships between farm scale, progeny, and milk yield traits in Simmental breed cattle raised in the Teke Region, and as the farm scale increased, calving interval, service period, lactation milk yield, and 305-day milk yield increased. Increasing enterprise scale allowed to increase herd management, care and feeding facilities with providing technological innovations. For this reason, it can be recommended that the developing and implementing comprehensive models on preventing breast, foot, and nutritional diseases and economic efficiency should be applied to increase fertility and milk yield in dairy cattle farms.
Alkali-Activated Mortars Incorporating Construction and Demolition Waste and Industrial By-products: A Fresh and Hardened State Evaluation
(Gazi Universitesi, 2025) Güzelküçük, Selahattin; Şahin, Oğuzhan; Eren, Sevki; Ulugöl, Hüseyin
This study examines the potential of alkali-activated composites to produce sustainable building materials by recycling construction and demolition waste (CDW). Various waste materials such as ground granulated blast furnace slag (GGBS), class F and C fly ash (FA), recycled waste clay brick powder (RWBP), and waste concrete powder (WCP) were used to produce different alkali-activated composites along with recycled concrete aggregate. The prepared mixtures were analyzed for their fresh-state properties, as well as their physical and mechanical characteristics, including workability, strength, ultrasonic pulse velocity (UPV), and resistance to high temperatures. The findings indicate that mixtures with class C fly ash achieved higher compressive strength, whereas F class fly ash positively affected workability and high-temperature resistance. Slag effectively enhanced the compressive strength of the alkali-activated composites. In particular, the B3 mixture (20% class F fly ash, 40% slag) exhibited a balanced set of properties in terms of workability, compressive strength, and high-temperature performance. This study provides a valuable resource for producing alkali-activated composites from CDW and industrial waste, with the potential to reduce the environmental impact of the construction sector.
The Relationship Between Agricultural Productivity, Economic Growth and Carbon Emissions: Evidence from The Turkic Republics
(Turkish Journal of Agricultural Economics, 2025) Uçar, Mehmet; Ülger, Mücahit; Atamer, Mert Anıl; Alptürker, Hakan
Purpose: This study aims to examine the causality relationships between agricultural productivity, economic growth and carbon (CO₂) emissions using annual data for the period 1992–2022 in the Turkic Republics (Azerbaijan, Kazakhstan, Kyrgyzstan, Uzbekistan, Tajikistan, Türkiye and Turkmenistan). Design/Methodology/Approach: In the analysis, the CADF method was used as the second-generation unit root test after the CD and homogeneity tests. Then, the cointegration test was performed. The panel causality relationships were analyzed using the causality test by Kónya. Findings: According to the findings, while a causality from CO₂ to agricultural productivity was detected at the panel level, no causality was observed from agricultural productivity to CO₂. Similarly, while there was a causal relationship from agricultural productivity to economic growth, no causal relationship from economic growth to agricultural productivity could be detected. In addition, bidirectional causality was found between economic growth and CO₂ at the panel level. At the cross-sectional level, country-based results revealed that relations differed. A bidirectional causality was found between CO₂ and agricultural productivity in Kazakhstan, and a causality from CO₂ to agricultural productivity was found in Türkiye and Turkmenistan. Bidirectional causality between economic growth and CO₂ was found in Kazakhstan, Kyrgyzstan, and Türkiye, and causality from CO₂ to economic growth was found in Uzbekistan and Turkmenistan. A causality from agricultural productivity to economic growth was found in Tajikistan and Turkmenistan, and economic growth to agricultural productivity in Türkiye. Originality/Value: This study is one of the rare studies examining the relationship between carbon emissions, agricultural productivity and economic growth in the Turkish Republics, and offers original methodological and regional contributions to the literature by using long-term data for the period 1992-2022 and second-generation panel data methods. The findings will guide sustainable development policies in the light of region-specific dynamics.
