Fakülteler / Faculties
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Item Experiences Of Nurses Providing Care To Hospitalized Patients With Acute Mania In Türkiye: A Phenomenological Study(Başkent Üniversitesi Sağlık Bilimleri Fakültesi, 2024-04-27) Oksuz, Emine; Mersin, Sevinc; Ucgun, Tugce; Sarikoc, GamzeThe main purpose of this study was to determine the experiences of nurses who care for hospitalized patients experiencing an acute manic episode. This qualitative study was carried out with 15 nurses working in a psychiatric ward in T & uuml;rkiye. Data were collected through semi -structured in-depth individual interviews and focusgroup interviews in which the face-to-face interview technique was used. Two main themes emerged from the analysis of the qualitative data: (1) the difficulties experienced and (2) the most effective elements of care. Under the first main theme, the following sub -themes emerged: difficulties in setting boundaries, safety concerns, difficulties in managing the patient's demands, inability to choose the appropriate word(s), and the "emotional whirlwind" experienced. The second main theme, on the other hand, included the following sub -themes: meeting basic needs, ensuring treatment compliance, encouragement to engage in physical activity, and having a sufficient number of qualified personnel. The study revealed that the nurses had difficulties in caring for their manic patients. On the basis of these results, it is recommended that nurses be given counseling and training on setting boundaries, ensuring safety, managing the patient's demands, coping with their own emotions, and communicating better. In addition, the study identified the importance of nursing interventions to meet patients' basic needs, encourage them to engage in physical activity, and ensure treatment compliance, and the importance of there being an adequate number of qualified personnel. These results may help students and other nurses in terms of assessing and setting priorities in cases needing acute psychiatric care.Item Flow Rate-Dependent Properties Of Sno2 Thin Films Deposited By Ultrasonic Spray Pyrolysis(Başkent Üniversitesi Mühendislik Fakültesi, 2024-05-02) Gunes, Ibrahim; Sarica, Emrah; Ozcan, Hakan Bilal; Terlemezoglu, Makbule; Akyuz, IdrisThis study unveils the outcomes of fabricating and characterizing SnO2 thin films through ultrasonic spray pyrolysis. Also, it focuses on the effect of manipulating flow rates on their structural, optical, and electrical characteristics. Structural analysis revealed that the films exhibited a tetragonal rutile structure and (200) crystallographic planes become preferential as the flow rate increases. Crystallite size and lattice strain were calculated using the Debye-Scherrer and Williamson-Hall methods, demonstrating that higher the flow rate resulted in larger crystallite sizes and reduced lattice strain. SEM images showed that all films have uniform and consistent film thickness and grain size enlarged with the solution flow rate as well. The films exhibited high optical transparency (>80%) in the visible spectrum, making them suitable for transparent conductive applications. The band gap of the films decreased gradually with flow rates, and the Urbach energy slightly increased. Hall effect measurements revealed higher flow rates resulted in lower sheet resistance (lowest is 1.32 x 10(2) Omega/sq) and higher carrier mobility (highest is 22.12 cm(2)/V.s), indicating improved electrical properties. These findings offer valuable perspectives for forthcoming researches.Item A Revisit To The Plane Problem For Low-Frequency Acoustic Scattering By An Elastic Cylindrical Shell(Başkent Üniversitesi Mühendislik Fakültesi, 2024-03-16) Yucel, Hazel; Ege, Nihal; Erbas, Baris; Kaplunov, JuliusThe proposed revisit to a classical problem in fluid-structure interaction is due to an interest in the analysis of the narrow resonances corresponding to a low-frequency fluid-borne wave, inspired by modeling and design of metamaterials. In this case, numerical implementations would greatly benefit from preliminary asymptotic predictions. The normal incidence of an acoustic wave is studied for a circular cylindrical shell governed by plane strain equations in elasticity. A novel high-order asymptotic procedure is established considering for the first time all the peculiarities of the low-frequency behavior of a thin fluid-loaded cylinder. The obtained results are exposed in the form suggested by the Resonance Scattering Theory. It is shown that the pressure scattered by rigid cylinder is the best choice for a background component. Simple explicit formulae for resonant frequencies, amplitudes, and widths are presented. They support various important observations, including comparison between widths and the error of the asymptotic expansion for frequencies.Item An Econophysics Perspective on Green Bonds and Stock Market Nexus: Can Green Finance be an Investment Option for Emerging Stock Markets?(Başkent Üniversitesi İktisadi İdari Bilimler Fakültesi, 2024-03-28) Acikgoz, TurkerGreen bonds are one of the most fascinating financial innovations that offer a solution to climate change and sustainable development from the financial point of view. In this study, we employ methods from statistical physics to examine the multifractal features of cross-correlations between green bonds and emerging stock markets. Utilizing multifractal detrended cross-correlation analysis (MFDCCA) on return and volatility series, our findings reveal significant cross-correlations between green bonds and emerging stock markets. The MFDCCA results uncover multifractal features and long-range cross-correlations between the two assets. Notably, volatility cross-correlations exhibit persistent behavior, while return cross-correlations vary across small and large fluctuation periods. These findings hold practical implications for policymakers and investors involved in green bonds and emerging stock markets.Item Azole Rings Linked To Cox Inhibitors Via Hydrazone Bridge: Synthesis, Stereochemical Analysis, And Investigation Of Antimicrobial Activity(Başkent Üniversitesi Eczacılık Fakültesi, 2024-04-19) Karaguzel, Ayse; Ugur, Suemeyye Buran; Cetinkaya, Yasin; Dogan, Senguel Dilem; Stevanovic, Milena; Nikodinovic-Runic, Jasmina; Gunduz, Miyase GozdeNonsteroidal anti-inflammatory drugs (NSAIDs) alleviate inflammation and pain through the inhibition of cyclooxygenase (COX) enzymes. Besides these widely recognized therapeutic utilizations, NSAIDs have been reported to display moderate antimicrobial activity and enhance antimicrobial efficacy when administered in combination with commercial antimicrobial drugs. In the present study, we designed novel potential antimicrobial agents by linking some NSAIDs (ibuprofen, flurbiprofen, and naproxen) to various azole rings (pyrazole, imidazole, triazole, and benzimidazole) via hydrazone functionality. The hydrazone linker was introduced into the chemical scaffold of the title molecules by the reaction between hydrazides obtained from NSAIDs and inhouse synthesized azole-carrying benzaldehydes. The structures of the target compounds were elucidated by a combination of spectral methods. The NOESY spectra and stereochemical analyses performed using DFT method confirmed the presence of the target molecules as a mixture of E(C=N)-E(N-N)-synperiplanar and E(C=N)-E(N-N)antiperiplanar conformers in DMSO-d6 solution. 1H and 13C NMR chemical shift values in DMSO were calculated using the GIAO method and compared with the experimental NMR data. Finally, some derivatives were demonstrated to inhibit Candida albicans filamentation and/or bacterial communication system known as quorum sensing. For COX inhibitor-azole hybrids with antimicrobial potency, naproxen appeared to be the most appropriate NSAID, while bulky benzimidazole was not found as a preferable azole ring.Item Validity And Reliability Of Turkish Version Of The Secondary Screening Instrument For Targeting Educational Risk Questionnaires(Başkent Üniversitesi Sağlık Bilimleri Fakültesi, 2024-04-01) Tokgoz-Yilmaz, Suna; Hancer, Hale; Orak, OzgeObjective: The Secondary Screening Instrument for Targeting Educational Risk Questionnaires (Secondary S.I.F.T.E.R.) is a scanning tool for teachers to evaluate the challenges and educational risks faced by deaf and hard of hearing (DHH) students. In Turkey, there is a need for a screening tool to identify academic risks among DHH students. This study aimed to adapt the Turkish version of the Secondary S.I.F.T.E.R. (Secondary S.I.F.T.E.R.-T) and evaluate its validity and reliability. Materials and Methods: The Secondary S.I.F.T.E.R.-T was translated and cross-culturally adapted. Subsequently, the Secondary S.I.F.T.E.R.-T was administered by teachers of 104 DHH students (group 1) and 69 normal-hearing students (group 2) in the 6th to 12th grades to evaluate. Results: In the validity analysis of the Secondary S.I.F.T.E.R.-T, the item-total correlation coefficients, content validity ratio, and index were found to be compatible with the literature, and the subscale and total scale scores of the two groups were significantly different. High internal consistency reliability was determined using Cronbach's alpha, split-half Spearman-Brown correlation, and Guttman's coefficients. A scoring grid was developed to identify low-, middle-, and high-performing students. Conclusions: The validity and reliability analyzes of the Secondary-S.I.F.T.E.R.-T were found to be acceptable, and scoring grids were determined. Secondary-S.I.F.T.E.R.-T can be used as a screening tool to identify academic risks among DHH students in Turkey.Item Structural EEG Signal Analysis For Sleep Apnea Classification(Başkent Üniversitesi Mühendislik Fakültesi, 2024-03-27) Kocak, Onur; Ficici, Cansel; Firat, Hikmet; Telatar, ZiyaObjectives: Diagnosing the sleep apnea can be critical in preventing the person having sleep disorder from unhealthy results. The aim of this study is to obtain a sleep apnea scoring approach by comparing parametric and non-parametric power spectral density (PSD) estimation methods from EEG signals recorded from different brain regions (C4-M1 and O2-M1) for transient signal analysis of sleep apnea patients. Methods: Power Spectral Density (PSD) methods (Burg, Yule-Walker, periodogram, Welch and multi-taper) are examined for the detection of apnea transition states including pre-apnea, intra-apnea and post-apnea together with statistical methods. Results: In the experimental studies, EEG recordings available in the database were analyzed with PSD methods. Results showed that there are statistically significant differences between parametric and non-parametric methods applied for PSD analysis of apnea transition states in delta, theta, alpha and beta bands. Moreover, it was also revealed that PSD of EEG signals obtained from C4-M1 and O2-M1 channels were also found statistically different as proved by classification using the K-nearest neighbour (KNN) method. Conclusions: It was concluded that not only applying different PSD methods, but also EEG signals from different brain regions provided different statistical results in terms of apnea transition states as obtained from KNN classification.Item Use Of Advanced Measurement And Reality Technologies In Cultural Heritage Sites From The Perspective Of Technology And Tourism(Başkent Üniversitesi Ticari Bilimler Fakültesi, 2024-03-12) Varol, Fatih; Oksuz, MerveIn recent years, in parallel with technological innovations, the use of modern techniques instead of traditional methods has become widespread in studies on archiving, preserving, restoring and visiting cultural heritage (CH) in the digital environment. Reality technologies, advanced measurement methods in engineering and mobile applications have brought a multidisciplinary perspective to the subject of sustainability of CH sites and visiting them within the scope of tourism. This study investigates the contribution of studies carried out with the latest technological opportunities in CH areas to sustainability and tourism activities. It reveals with the most concrete examples how the fastest LIDAR (Light Detection and Ranging) technology used in remote sensing of concrete objects, as well as close range photogrammetry and unmanned aerial vehicle (UAV) photogrammetry applications can be integrated into the sustainability of CH and reality technologies. The three-dimensional (3D) images obtained in this way have enabled world-famous ancient cities, museums, natural and archaeological sites to be visited virtually with the help of augmented reality (AR), virtual reality (VR) and mixed reality (MR) applications. These methods also provide significant advantages in terms of time and cost compared to traditional technologies in the digital documentation of CH and VR studies.Item Exploring The Moderation Role Of Teacher Cultural Value Profiles On The Association Between Transformational Leadership And Teacher Job Satisfaction: Evidence From Turkish Education Context(Başkent Üniversitesi Eğitim Bilimleri Fakültesi, 2024-03-27) Sezgin, Ferudun; Kilinc, Ali Cagatay; Ozdemir, Servet; Ozdemir, Nedim; Erdogan, OnurThis study aims to identify teachers' cultural value profiles and to investigate how each profile moderates the empirical link between principal transformational leadership and teacher job satisfaction. Gathering data from a sample of 1062 teachers in 113 elementary and lower secondary schools in Turkiye, this cross-sectional study conducted latent profile analysis with moderation modelling to measure the structural links between study variables. Results showed that the sampled teachers were categorized under four profiles: decisive and participatory culture, flexible collaboration culture, rule-oriented culture, and respectful authority culture. The study also provided evidence of the significant moderator role of cultural values profiles on the association between transformational leadership and job satisfaction with the work environment and the profession. We provide implications for policy and practice.Item Ultra-Stable Nano-Micro Bubbles In A Biocompatible Medium For Safe Delivery Of Anti-Cancer Drugs(Başkent Üniversitesi Mühendislik Fakültesi, 2024-04-04) Bunyatova, Ulviye; Dogan, Mustafa; Tekin, Engincan; Ferhanoglu, OnurWe conducted a series of experimental investigations to generate laser-stimulated millimeter bubbles (MBs) around silver nanoparticles (AgNPs) and thoroughly examined the mechanism of bubble formation within this nanocomposite system. One crucial aspect we explored was the lifetime and kinetics of these bubbles, given that bubbles generated by plasmonic nanoparticles are known to be transient with short durations. Surprisingly, our findings revealed that the achieved lifetime of these MBs extended beyond seven days. This impressive longevity far surpasses what has been reported in the existing literature. Further analysis of the experimental data uncovered a significant correlation between bubble volume and its lifetime. Smaller bubbles demonstrated longer lifetimes compared to larger ones, which provided valuable insights for future applications. The experimental results not only confirmed the validity of our model and simulations but also highlighted essential characteristics, including extended lifetime, matching absorption coefficients, adherence to physical boundary conditions, and agreement with simulated system parameters. Notably, we generated these MBs around functionalized AgNPs in a biocompatible nanocomposite medium by utilizing low-power light excitation. By readily binding potent cancer drugs to AgNPs through simple physical mixing, these medications can be securely encapsulated within bubbles and precisely guided to targeted locations within the human body. This capability to deliver drugs directly to the tumor site, while minimizing contact with healthy tissues, can lead to improved treatment outcomes and reduced side effects, significantly enhancing the quality of life for cancer patients.