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
A New Generalized Laplace Transform and Its Applications to Fractional Bagley-Torvik and Fractional Harmonic Vibration Problems
(Unıv Mıskolc Inst Math, 2023) Ata, Enes; Kıymaz, İsmail Onur
In this paper, a new generalized Laplace transform is defined and its certain properties are given. By using the new transform, the solutions of fractional Bagley-Torvik and fractional harmonic vibration problems are obtained, as application. Also transformations of some elementary functions and the relationships between the new transform with other generalized Laplace transforms are given in separate tables.
Omuz Bölgesi Kemiklerinin Cinsiyet Tayini Açısından Morfolojik ve Morfometrik İncelenmesi
(Kırşehir Ahi Evran Üniversitesi - Sağlık Bilimleri Enstitüsü, 2025) Öncü, Ruken
Identification is the process of revealing the characteristics of living or dead people to
distinguish them from other people by using their body remains. In identification, gender
determination should be made after it is determined that the remains belong to a human
being. It is often not possible to reach all the bones of the individual's skeleton intact. In this
case, long bones are preferred for gender determination because they are more durable than
other bones. The aim of our study is to investigate whether the humerus, scapula and
clavicula bones of the shoulder girdle have a significant effect on sex determination. The
sample of our study consists of 217 individuals, 113 male and 104 female, between the ages
of 18-55, whose CT images were taken at the Radiology Department of Kırşehir Ahi Evran
University Education and Research Hospital. Measurements in DICOM files were
performed retrospectively by calculating centimeters (cm) and degrees (°) via the PACS
program. A total of 17 measurements were taken from the images, 12 linear and 5 angular,
and 2 proportional values consisting of these measurements were obtained. As a result of the
study, the area under the ROC curve (AUC) for the caput humeri diameter and cavitas
glenoidalis width variables were found to be statistically significant. When a cut-off value
xv
of 4.16 cm was applied to the measurements of the caput humeri diameter variable, the
observed sensitivity was 83.2% and specificity was 85.6%, while when a cut-off value of
2.78 cm was applied to the measurements of the cavitas glenoidalis width, the observed
sensitivity was 82.3% and specificity was 90.4%. These values indicate that the caput humeri
diameter and cavitas glenoidalis width variable can facilitate a sensitive, specific
classification for gender determination and has significant diagnostic utility. In forensic
medicine and anthropology, the fact that the upper extremity found separated from the body
has a strong effect on gender determination will also facilitate the identification of the
isolated extremity.
8.Sınıf Öğrencilerinin Öğrenme Süreçlerinde Kavram Karikatürü Kullanımının İncelenmesi: Üslü Sayılar Örneği
(Kırşehir Ahi Evran Üniversitesi - Fen Bilimleri Enstitüsü, 2025) Bektik, Gözde
The aim of this study is to examine the effect of concept cartoons on the learning
processes of 8th-grade students in the topic of exponential numbers. The study aims to
address students' conceptual misunderstandings, increase their interest in mathematics
lessons, and help them better comprehend mathematical concepts. The research method
was designed as a case study, one of the qualitative research methods. The study group
consisted of 8 eighth-grade students studying at a middle school in the city center of
Kırşehir during the 2023-2024 academic year. Throughout the research process,
instructional practices supported by concept cartoons were applied to the students. For
data collection, 21 concept cartoons developed by the researcher, designed to identify
students' conceptual misunderstandings, were used. Additionally, qualitative data were
gathered through student interviews conducted after the application. The findings
revealed that concept cartoons helped reduce students' misconceptions about exponential
numbers and increased their interest in the lessons. The students were able to concretize
abstract concepts through the use of cartoons and actively participated in the learning
process. According to student feedback, concept cartoons made the lessons more
enjoyable and facilitated understanding of the topics. As a result, it was concluded that
concept cartoons are an effective tool in mathematics education and positively impact
students' learning processes. In this context, it is recommended that concept cartoons be
used in teaching different mathematical topics as well.
Kral İstiridye Mantarının (Pleurotus eryngii) Üretim Sürecinde Farklı Substratların Lignoselülozik İçeriklerinde Meydana Gelen Değişimlerin Değerlendirilmesi
(Kırşehir Ahi Evran Üniversitesi - Fen Bilimleri Enstitüsü, 2025) Salmanoğlu, Burak
In this thesis, the bioconversion efficiency of Pleurotus eryngii grown on four
lignocellulosic substrates (lentil straw (LS), peanut straw (PS), peanut shell (PH) and poplar
sawdust (POS)) was evaluated using Fourier Transform Infrared (FTIR) spectroscopy to
analyze substrate degradation dynamics. On different substrates, the spawning period ranged
from 20.2-23.7 days, primordia formation took 41.8-47.2 days and first harvest occurred in
51.5-59.9 days, yield and biological efficiency ranged from 155.6-301.8 g/kg and 45.76-
86.23%. The study confirmed the agreement between FTIR spectroscopy and chemical-
lignocellulosic analysis. While the initial spectra revealed substrate-specific structural features,
the post-harvest profiles converged, showing partial lignin (1600, 1510 cm-1
) and cellulose
(1158, 1050, 896 cm-1
) degradation as well as fungal biomass accumulation
(protein/polysaccharide bands at 1650-1540 cm-1
). The LS substrate, characterized by low
lignin (LS: 8.57%) and high carbohydrate content, exhibited rapid decreases in
cellulose/hemicellulose bands, which was associated with improved mycelial colonization,
shorter cultivation cycles (20.2 days spawning run) and high biological efficiency (BE)
(86.23%). In contrast, lignin-rich substrates (PH: 22.43%; POS: 22.70%) showed limited
spectral shifts, inefficient polysaccharide degradation and long spawning time (25.3 and 23.7
days), resulting in reduced BE (55.53% and 45.76%, respectively). The differential degradation
of lignocellulosic components underlined substrate-specific enzymatic activity, with lignin
recalcitrance inhibiting cellulose accessibility at PH and POS. These findings establish a direct
link between substrate composition, FTIR-derived degradation patterns and fungal
productivity. Furthermore, the nutrient content of P. eryngii mushrooms grown on different
substrates was revealed by determining their FTIR spectra. The POS substrate shows the richest
and most balanced FTIR profile. Mushrooms growing on this substrate exhibited high content
of protein, fat and phenolic compounds. The FTIR absorptions of fungi grown on PS substrate
have the lowest intensities, probably due to limited nutrients and low bioactivity. Mushrooms
grown on LS substrate exhibited a profile close to that of the POS substrate. The study
VII
highlights that FTIR spectroscopy is a cost-effective tool to assess the biodegradability of the
substrate and guides the selection of sustainable agricultural residues for mushroom cultivation.
According to the results of the study, LS substrate showed promising results in terms of
mushroom yield and quality for use in P. eryngii production in our country. In addition, FTIR
spectroscopy was found to be a method that can be successfully used in mushroom cultivation
both to determine lignocellulosic changes and to reveal the nutrient profiles of mushrooms.
İç Ceviz Yan Ürünlerinden Protein Hidrolizatlarının Üretimi ve Özelliklerinin Belirlenmesi
(Kırşehir Ahi Evran Üniversitesi - Fen Bilimleri Enstitüsü, 2025) Ağca, Saniye Kariptaş
Walnut (Juglans regia) is a strategic agricultural product distinguished by its rich
nutritional content, nutraceutical properties, and wide range of applications, serving as a
significant economic resource for many countries worldwide. Walnut kernel is a biologically
and chemically valuable food material, representing the edible part of the walnut fruit and
holding a prominent place in the scientific literature due to its composition. In recent years,
besides the direct consumption of walnut kernels, the importance and demand for their
processed forms have been steadily increasing. This rise is crucial for promoting sustainable
food production and enhancing the agricultural economic value of walnuts. Walnut flour is a
by-product obtained by drying the walnut meal remaining after oil extraction from walnut
kernels. Utilizing these by-products, which are often considered waste and not effectively
valorized, for the production of protein hydrolysates offers an opportunity to create high-value-
added products. In this thesis, hydrolysis was performed using alcalase, Favourzyme®, and
savinase enzymes, and the effects of the hydrolysis process on the structural, functional, and
bioactive properties of walnut protein were investigated. During the hydrolysis process,
savinase exhibited the highest degree of hydrolysis (22.59%). Favourzyme® demonstrated the
best performance in terms of emulsification activity (282.16 m2/g) and foaming capacity
(77.67%), while savinase and alcalase enhanced fat-binding capacity. Regarding antioxidant
capacity, the Cizo fraction stood out with a high DPPH inhibition rate (61.39%-67.54%). This
study demonstrates that enzymes such as savinase, alcalase, and Favourzyme® provide an
effective technology for producing bioactive and multifunctional hydrolysates from walnut
proteins. Furthermore, it highlights the potential of samples like Cizo, which exhibit high
antioxidant capacity, to be utilized in functional food and pharmaceutical products.
