Sinop Üniversitesi Kurumsal Akademik Arşivi
DSpace@Sinop, Sinop 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 telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Theoretical Investigations on One-Photon Absorption Wavelengths and First Hyperpolarizabilities of Dipolar Subunits Described for an Octupolar System
(Ieee, 2019) Karakas, A.; Karakaya, M.; Migalska-Zalas, A.; Chtouki, T.; Erguig, H.
The microscopic second-order nonlinear optical (NLO) phenomena of dipolar subunits described for an octupolar system have been investigated by means of calculating both dispersion-free and also frequency-dependent first hyperpolarizability (beta) values from the density functional theory (DFT) and time-dependent Hartree-Fock (TDHF) approaches, respectively. We have estimated the maximum one-photon absorption (OPA) wavelengths by quantum chemical computations utilizing a configuration interaction (CI) technique for the title molecules in the UV area to be lower than 450 nm, indicating well optical transparencies to the visible beam. To find out the optical nonlinearity behaviour describing the molecular orbital structures; the highest occupied molecular orbitals (HOMOs), the lowest unoccupied molecular orbitals (LUMOs) and the HOMO-LUMO energy band gap properties belonging to the first and second frontier MOs have been computationally produced by the DFT procedure.
METHODOLOGY FOR THE EVALUATION OF GEOSITES FOR THE DEVELOPMENT OF GEOTOURISM IN CUBA
(Univ Cienfuegos, 2025) Guibert-Mejias, Jose-Alberto; Caseres-Cimet, Norge; Sierra-Mulet, Yulietsy; Diaz-Pompa, Felix; Bayram, Gul Erkol
It is essential to evaluate geosites for tourism purposes in order to achieve a more varied tourist offer, improve the quality of the visitor's experience and ensure the conservation of these areas. The objective of this research is to propose a methodology for the evaluation of geosites for tourism purposes in Cuba. The design of the proposal is carried out taking into account two fundamental moments: the preparation of the bases for the design of the methodology and the design of the methodology for the evaluation of geosites for tourism purposes. A search, comparison and analysis of scientific literature on different methods of evaluation of geosites for tourism purposes will be carried out in databases such as Sciencedirect and Scopus. The methodology developed is structured in five phases that include 18 evaluation indicators, the quantitative method is weighted with the use of scientific observation method and surveys to have a global vision when collecting information from the perspective of tourists, community, experts and managers. The results interpretation matrix will be used as an analysis tool. The proposed methodology will be an important tool to improve the management of tourist geosites and guarantee their conservation.
On Direct Estimates and Approximation Results by the Kantorovich Operators in Weighted Grand Lebesgue Spaces
(Padova Univ Press, 2026) Aydin, Ismail; Akgun, Ramazan
We give some new embeddings results for weighted grand Lebesgue spaces L-omega(p)),delta (Omega), where Omega subset of R-d is a open bounded subset. We also obtain the boundedness of the Kantorovich operator K-n in L-omega(p),delta) [0, 1]. In addition, we establish two direct estimates by K-functionals of the rate of approximation in L-omega(p),delta) [0,1].We generalize the direct estimate inequality in classical Lebesgue spaces L-p [0,1] to L-omega(p),delta)[0,1] using the boundedness of the Hardy-Littlewood maximal operator in L-omega(p),delta) [0,1]. Finally, we obtain similar results in [8] for the spaces L-omega(p),delta) [0,1].
Protective effect of Asphodelus aestivus Brot. on bladder injury due to ischemia-reperfusion: Biochemical and histopathological Study
(Natl Inst Science Communication-Niscair, 2025) Kopar, Hatice; Yagmur, Isil; Kurutas, Ergul Belge; Tural, Rabia
Severe oxidative stress caused by reperfusion after ischemia in the bladder causes serious functional and structural damage. New molecules with antioxidant effects are needed to protect against this damage. In our study, we aimed to investigate the effect of Asphodelus aestivus on the oxidant-antioxidant system in bladder ischemia/reperfusion (I/R) injury induced in rats biochemically and histopathologically. In our study, 24 three-month-old male Wistar-Albino rats weighing 250-300 g were randomly divided into 3 groups of 8 rats each: sham group (I/R+serum physiological, 1mL) (group 1), I/R group (group 2), I/R+A. aestivus group (50 mg/kg/day) (treatment group, group 3). At the end of the experiment, all rats were sacrificed and their bladder tissues were taken and divided into 2 parts for biochemical and histopathological examination. Protein amount, malondialdehyde (MDA) levels and superoxide dismutase (SOD) and catalase (CAT) enzyme activity levels were measured spectrophotometrically, and histopathological examination was performed under a light microscope. MDA levels were significantly higher and CAT activity was significantly lower in the I/R group compared to the sham and treatment groups (P<0.05). In histopathological examination, it was determined that there was a significant regression and/or decrease in the findings caused by I/R injury in the group treated with A. aestivus. A. aestivus has a protective effect in reducing oxidative stress in bladder I/R injury.
From the People, Against the People: Banditry in Turkey during the National Struggle
(Osman Kose, 2025) Tekir, Suleyman; Balaban, Tugrul
When the phenomenon of banditry is analyzed from a historical perspective, it is considered as movements that emerge from within the public against the social order and paradoxically manifest themselves against the public and encompass collective rebellion. Due to their local character and limited organizational capacity, these organizations could not evolve into a sustainable resistance movement and were systematically liquidated by the state mechanism. This study analyzes the activities of gang and bandit groups operating in Turkey during the National Struggle in the period 1920-1924 based on archival documents. During the period of the War of Independence, politically motivated rebellion movements that emerged with the provocation and encouragement of external actors stand out. Although banditry cases, which can be categorized as ordinary banditry, were considered as isolated incidents, these activities emerged as the dominant factor threatening the social order of the country. Banditry acquired a dichotomous character in the period in question: Organizations that supported the National Struggle and those that acted under the influence of external factors. These two new movements replaced the traditional banditry paradigm.
