Welcome to the Open Access System!
OpenAccess@KU is the Academic Open Access System of Kastamonu University. It was established in June 2014 to digitally store and open access the academic outputs of Kastamonu University in international standards. OpenAccess@KU includes academic outputs such as articles, presentations, thesis, books, book chapters, reports produced within the body of Kastamonu University.
Kastamonu Üniversitesi Akademik Arşivi Creative Commons Alıntı-GayriTicari-Türetilemez 4.0 Uluslararası Lisansı ile lisanslanmıştır.
Recent Submissions
Monitoring the operational changes in surface reflectances after logging, based on popular indices over Sentinel-2, Landsat-8, and ASTER imageries
(2025) Genç, Ç.Ö.; Altunel, A.O.
Revealing the status of forests is important for sustainable forest management. The basis of the concept lies in meeting the needs of future generations and today's generations in the management of forests. The use of remote-sensing (RS) technologies and geographic information systems (GIS) techniques in revealing the current forest structure and in long-term planning of forest areas with multipurpose planning techniques is increasing day by day. Significant technological advances are in allowing programmers to modernize how they manage data. Sentinel-2, which is a relatively new addition to Earth observing satellites, is a new-generation satellite that has enabled classification and monitoring of land cover change with high precision at ease. Visible R, G, B, and near-infrared (NIR) bands have offered exceptional 10-m spatial reasolution, making them suitable for vegetation monitoring along with the additional 20-m bands to spare especially in chlorophyll content analyses. On the contrary, Landsat-8 and ASTER which have been longer lasting in Earth observation were rougher results especially in forestry studies. In this study, Landsat-8 and ASTER satellite images were compared against the Sentinel-2 images as a reference in conjunction with GIS techniques to monitor and assess the impact of various logging procedures, including selective logging and regeneration silviculture. The investigation employed a range of plant vegetation indices, including NDVI, GNDVI, and SAVI, to evaluate the efficacy of image resolution in detecting forest cover changes in the Kastamonu region, where the timber production is the hightest in Turkey. For selective and regeneration activities, satellite images were taken pre-harvesting and immediately post-harvesting, and index maps were produced. NDVI, GNDVI, and SAVI indices were the most accurate indicators of green vegetation change in the Sentinel-2A imagery. Similarly, for the Landsat-8 imagery, the SAVI, NDVI, and GNDVI indices were found to be satisfactory indicators. As for ASTER imagery, the success sequance was like SAVI, GNDVI, and NDVI. Based on the findings of this study, it has been noted that the ASTER imagery closeness to Sentinel-2A was more remarkable in detecting changes in green vegetation in forested areas. The data derived from ASTER imageries demonstrated superior efficacy compared to Landsat-8 in generating forest cover maps, owing to their proximity to those produced by Sentinel-2. The findings also indicated that ASTER imagery, with suitable spatial and spectral resolution, could still be utilized as efficienly as Landsats to generate forest cover density maps and monitor long-term forest conservation practices, particularly in professionally managed forests. Thus, this methodology demonstrated the capacity for efficient worldwide forest management.
Effect of middle-age plasma therapy on ileum morphology, immune defense (IgA) and cell proliferation (Ki-67) of female aged rats
(Springer Science and Business Media Deutschland GmbH, 2025) Asmaz, E.D.; Teker, H.T.; Sertkaya, Z.T.; Ceylani, T.; Genç, A.İ.
Blood plasma therapy, a new treatment method to eliminate the damage and deterioration caused by aging in many organ systems, has attracted increasing attention. The digestive tract, which cooperates with many different systems, has strong effects on our health. In the present study, the effects of plasma therapy on the ileum of elderly rats were investigated. Wistar rats (n = 7; 12–15 months old) were given pooled plasma collected from middle-age rats (6 months, n =28) (for 30 days, 0.3 ml daily, intravenously into the tail vein). At the end of the experiment, villus height, crypt depth, total mucosal thickness and surface absorption area were evaluated. In addition, the effects of IgA, which plays a role in the digestive system's defense against microorganisms, were examined. Both the cell proliferation intensity and proliferation index were evaluated in crypt cells. An increase was determined in all morphological parameters in the experimental group. Similarly, plasma application decreased IgA expression and numbers in the experimental groups. Contrarily, cell proliferation parameters showed a significant increase in the experimental groups' crypt cells. Therefore, we found that the treatment supports the digestive system in terms of both nutrient utilization and absorption-related parameters and has a protective effect on intestinal immune system parameters.
Environmental, Social, and Governance (ESG) Dynamics in the Energy Sector: Strategic Approaches for Sustainable Development
(2024.01.01) Yucel, M.; Yucel, S.
ESG metrics have become increasingly important in evaluating corporate sustainability and meeting regulatory expectations. Thus, it is essential to explore these elements for a clearer understanding. This study examined the environmental (E), social (S), and governance (G) scores across various sub-sectors of the energy industry. Using systems thinking and creating shared value (CSV) approaches, the research investigated whether ESG performance varies significantly among the sub-sectors and how changes in one pillar might influence the others. Data from 576 companies in the Thomson Reuters EIKON database were analyzed using ANOVA, correlation, and multiple regression. The results revealed distinct differences in the ESG scores among sub-sectors, with environmental and social practices often reinforcing each other. However, governance showed a weaker influence, highlighting the need for further research on governance frameworks to clarify the underlying reasons and to integrate better with other ESG pillars. The research has specific implications for strategic management and provided recommendations for further studies.
Diaspora of Diaspora: Turkey-Finnish Tatars Relations
(2024.01.01) Küçük, E.; Yilmaz, M.
From the rise of the diaspora of Mishar Tatar Turks in Finland - now known as the Finnish Tatar community - in the late 19th century to the present, the community has sought connections with the Ottoman Empire and later the Turkish Republic (from 1923 onward). Cold War politics partially account for why Finnish Tatars sought Turkish support, given that the community's homeland lay in Soviet Russia. Even as Finnish Tatars re-established links with fellow Mishar Tatar Turks in present-day Russia, the diaspora community has continued to seek support from Turkey. Furthermore, Finnish Tatars have, in turn, supported Turkey, especially in advocating for Turkey's acceptance into the European Union. Using diaspora studies, this article addresses the gap in connections between Finnish Tatars and Turkey. Through an overview of relations between Finnish Tatars and Turkey and a case study on the establishment of the Finnish-Turkish Folk School in 1948, which was born with influence from Turkey, the article argues that the transnational connections between Finnish Tatars and Turkey have been beneficial to both parties.
From seeds to science: fostering scientific inquiry through tree activities in early education
(2024.01.01) Kaya, G.; Ahi, B.
Scientific inquiry is recognized for enhancing children's scientific thinking, reasoning, and questioning skills at an early age, while also increasing their science capital. However, how scientific inquiry practices can be effectively implemented at this age remains a challenge. This study used an activity combining scientific inquiry and environmental education that can be used in early childhood classrooms. The details given in the study and how children were actively involved in the process were also clearly stated. In light of the questions asked by the children at the end of the activity, how scientific inquiry sprouted was discussed. This study will be a guiding light for teachers who want to employ scientific inquiry in their classrooms at an early stage and who want to use a structure integrated with the concept in the curriculum.