WoS İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://acikerisim2.beykoz.edu.tr/handle/20.500.12879/2

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The Factor Structure of Formal Thought Disorders in Individuals with Ultra-High for Psychosis and Its Associations With Clinical and Neurocognitive Findings
(Wiley, 2025) Guliyev, Ezgi Ince; Ceylan, Melis; Turkoglu, Cagla Ceren; Noyan, Handan; Ucok, Alp
Enhancing Teacher Candidates' Skills in Developing Game-Based Learning Applications
(Çukurova University, 2025) Alagoz, Abdullah; Uysal, Omer
The integration of technology into education has led to a broadening of the range of instructional activities. Among these, digital educational games, which resonate with Generation Z, stand out. These games introduce innovations in teaching by improving knowledge retention and providing engaging learning experiences both in and outside of the classroom. It is essential for educators to adapt to these innovations. This study aims to explore the views of prospective teachers in Turkey on game-based learning tools and assess the effectiveness of a specially designed instructional program for educational digital games. The research was carried out with 13 prospective teachers from the Department of Computer Education and Instructional Technologies at Uluda & gbreve; University Faculty of Education. Employing a mixed-methods approach, a distinct instructional program was created to equip participants with the skills necessary to develop educational digital games using the GDevelop software. In the quantitative dimension of the study, pre-tests and post-tests were administered to evaluate the reliability and validity of the achievement test, and data analysis was performed accordingly. In the qualitative phase, participants were interviewed at the end of the study using a semi-structured form containing 14 questions. The findings revealed that the Wilcoxon signed-rank test applied in the quantitative analysis showed a statistically significant improvement in the participants' abilities to develop educational digital games, confirming the effectiveness of the instructional program. Qualitative data analysis highlighted that participants felt the study had enhanced their ability to develop game-based learning applications. They noted that the specially designed games aligned with the instructional program could serve as effective tools to reinforce learning, capture students' attention, and boost motivation. Moreover, the program was found to support the development of 21st-century skills, while enhancing teachers' capabilities in game design and problem-solving. From the students' perspective, the developed games were perceived as motivating, enjoyable, and engaging.
Emotion Regulation and Visual Attention in Body Dysmorphic Disorder: A Multimodal Study Using EEG, GSR, and Eye-Tracking
(BMC, 2026) Ulker, Selami Varol; Cinaroglu, Metin; Yilmazer, Eda; Sayar, Gokben Hizli
BackgroundBody Dysmorphic Disorder (BDD) is a psychiatric condition characterized by obsessive preoccupation with perceived physical flaws, often accompanied by emotional dysregulation and attentional biases. Despite increasing clinical recognition, the neurophysiological and attentional mechanisms underlying BDD remain poorly understood.MethodsThis study employed a multimodal experimental design to compare individuals with BDD (n = 27) and healthy controls (n = 27). Participants completed standardized psychometric assessments and were exposed to emotionally valenced facial and body-related images while undergoing electroencephalography (EEG), galvanic skin response (GSR), and eye-tracking. Group-by-valence interactions were analyzed using mixed-model ANOVAs.ResultsThe BDD group showed significantly higher depression, anxiety, body image disturbance, and suppression scores, alongside reduced cognitive reappraisal and self-efficacy. EEG analyses revealed increased N170 amplitudes, attenuated P300 amplitudes, and greater right-sided frontal alpha asymmetry, suggesting early hypervigilance, reduced evaluative processing, and affective withdrawal. GSR data indicated heightened sympathetic arousal and delayed physiological recovery. Eye-tracking data descriptively indicated gender-specific attentional patterns within the BDD group, with females allocating greater visual attention to facial and lower-body regions and males showing increased fixation on muscular upper-body features; such patterns were not observed in the control group.ConclusionBDD is associated with dysregulated multisystem responses to appearance-related stimuli, characterized by neural hyperreactivity, impaired cognitive-emotional regulation, and gender-related patterns of visual attention. These findings support the utility of integrating psychophysiological and attentional markers into individualized assessment and intervention strategies for BDD.Clinical trial numberNot applicable.
A New Approach for Increasing the Photocatalytic Activity of Titanium Dioxide in Water Hydrolysis
(Pleiades Publishing Ltd, 2026) Kasapbasi, Emine Esra; Kirci, Serap; Hatipoglu, Arzu
Photocatalytic hydrogen production via water splitting is a sustainable and promising green technology. Producing clean hydrogen fuel using sunlight will significantly benefit the environment. TiO2 photocatalysts can split water into H-2 and O-2 under sunlight. However, the wide band gap of TiO2 (similar to 3.2 eV) limits its activity to UV-light, making it inactive under visible light. Doping with cations has been shown to enhance visible-light absorption and affect the photocatalytic properties of TiO2. Despite extensive research, there is still no clear explanation for how different cations influence its activity under solar irradiation. In this study, the non-defective anatase (001) surface was modeled using finite, neutral, stoichiometric cluster models derived from bulk anatase. Doped models were created by substituting one Ti atom with a cation, and their positions were optimized for minimum energy. Calculations were carried out using Density Functional Theory (DFT) with the B3LYP hybrid functional and the 6-31G(d) basis set. All dopants were found to reduce the TiO2 band gap, improving visible-light activity. Additionally, metal doping positively influenced water decomposition. Water showed a tendency to remain dissociated in clusters doped with +4 and +5 valence cations, indicating enhanced catalytic potential. Among these, the Ta5+-doped cluster exhibited the highest reaction energy, suggesting that future studies should focus on the reaction energetics of +5 valence doped systems to better understand their role in photocatalytic efficiency.
Coping Strategies and Psychological Outcomes Following the 2023 Kahramanmaraş Earthquakes: A Systematic Review with Meta-Analytic Synthesis
(Frontiers Media SA, 2026) Cinaroglu, Metin; Yilmazer, Eda
Background The 2023 Kahramanmara & scedil; earthquakes caused unprecedented devastation across southern T & uuml;rkiye, resulting in widespread psychological distress among survivors. Identifying coping strategies linked to better mental health outcomes is essential for guiding post-disaster support. Objective To systematically synthesize quantitative evidence on associations between coping strategies and psychological outcomes (PTSD/trauma symptoms, depression, anxiety, and posttraumatic growth [PTG]) among adult survivors of the 2023 earthquakes, and to meta-analyze associations reported in at least two independent studies. Methods Following PRISMA 2020 guidelines and a preregistered OSF protocol (osf.io/7z2pe), four databases (Web of Science, Scopus, PubMed, and DergiPark) were searched for quantitative studies published in Turkish or English. Ten cross-sectional studies (total N = 6,223) met inclusion criteria. Data were extracted using a standardized form, study quality was appraised with an adapted Newcastle-Ottawa Scale, and random-effects meta-analyses were conducted for coping-outcome pairs reported in >= 2 studies; remaining associations were summarized descriptively. Results Meta-analytic evidence indicated that resilience was consistently associated with lower psychological distress, including post-earthquake trauma severity (pooled r = -0.44), depression (r = -0.41), anxiety (r = -0.43), and overall distress across four studies (r = -0.42). Perceived social support/support-seeking coping was moderately associated with lower PTSD/trauma-related symptoms (pooled r = -0.31). Religious coping (pooled r = -0.21) and positive reappraisal (pooled r = -0.19) showed small inverse associations with PTSD symptoms but with substantial heterogeneity. In single-study analyses, meaning-centered coping and self-compassion were associated with higher PTG, suggesting potentially important pathways that require replication. Conclusion Coping processes are meaningfully linked to psychological adjustment after the Kahramanmara & scedil; earthquakes. The most robust evidence supports resilience and social support as protective correlates of lower distress. Evidence for religious coping and positive reappraisal is suggestive but heterogeneous, and PTG-related findings remain preliminary due to limited replication. Longitudinal and intervention-based research is needed to clarify causal mechanisms and inform culturally responsive disaster mental health programs.
The Role of Voluntary Organizations in Building Trust
(TUBA-Turkish Academy of Sciences, 2023) Yanikkaya, Halit; Saglam, Guler
Voluntary organizations are crucial in promoting generalized social trust in a society. The aim of this study is thus to investigate the relationship between the generalized social trust and membership in voluntary organizations. We employ the World Values Survey data for 48 countries including Turkiye on trust and organizational membership for the years 2017-2020 (Wave 7). In addition to the overall organizational membership, this study also investigates the nexus between trust and membership in large numbers of voluntary organizations such as "sport or recreational organization, political party, art, music or educational organization, professional association, humanitarian or charitable organization, religious organization, consumer organization, selfhelp group, mutual aid group". Our logistic regression estimates show that all of these membership variables are significantly related with the trust variable for the full sample. Thus, our results provide substantial evidence for the argument that membership in voluntary organizations is an important factor in building trust in a society. Our further estimations also imply that the positive association between organizational membership and trust holds regardless of the being active or inactive member. However, unlike the full sample, our results for Turkiye show that while overall organizational membership fails to raise trust, memberships to some voluntary organizations such as labor union, political party and aid organizations have even negative association with trust in Turkiye.
Sustainable Development and Green Sukuk: The Case of Turkiye
(TUBA-Turkish Academy of Sciences, 2023) Yesilyaprak, Mehmet
In this study, it has been tried to emphasize the increase in events such as global warming, environmental pollution, Covid-19 pandemic in recent years and the impact of all these important environmental effects on the sustainability of life. At the beginning of the study, a literature search is conducted. In the following, the concepts of sustainability and sustainable development are explained. In the fourth chapter, sustainable and climate change finance, sustainable development finance, climate finance, green finance and green finance applications in the world and in Turkiye are explained. In the fifth chapter, green sukuk is explained in detail. In the sixth chapter, examples of green sukuk in the world and in Turkiye are given. In the seventh chapter, what has been done about green sukuk in Turkiye, its problems, solution suggestions and the future of green sukuk are given.
Gender Equality and Femvertising Practices in Advertisements
(Mehmet Akif Ersoy University, 2025) Yaman, Duygu; Songur, Ahmet
Female figures, frequently featured as the central element in product and service advertisements, are pivotal in shaping marketing messages. In the broader context of gender representation, the roles attributed to women, both traditional and modern, have undergone significant transformations in contemporary society. Feminism, as a key factor influencing modern role distribution, has led to the emergence of feminist marketing, which is often referred to in the literature as femvertising. Using a content analysis methodology, this study examines commercials, awarded across various categories by the EFFIE organisation in 2022. The goal is to explore whether the feminist marketing in these advertisements is driven by commercial interests or is aimed at empowering the female figure from a societal perspective. A comparative analysis was conducted between the commercials of the same brands on March 8th, International Women's Day. The content analysis revealed that, while the awarded commercials predominantly emphasise traditional gender roles, the commercials for International Women's Day focus more on modern role distribution. Additionally, while femvertising appears less frequently in the International Women's Day commercials, it is more prevalent in the other award-winning ads. To broaden the scope of the research, semi-structured interviews were conducted with brands operating in Istanbul, which had received awards in the Mediacat 2022 Best Advertising Agencies category and were also included in the content analysis sample. The interviews were handled within the framework of a descriptive phenomenological approach. Semi-structured interviews were analysed through the MAXQDA program. They noted that the reason for the increase in femvertising application was that the brand's purpose was to create sympathy in the consumer and to make commercial profit. They stated that femvertising applications were advertising tactics. Another result of the study is that the concept of femvertising is perceived conceptually differently by advertisers and advertising agencies.
Solution to the Single Parametric Linear Programming Problems via Simplex-Based Algorithms: Handling the Uncertainties in Costs, Left or Right-Hand Sides
(Croatian Operational Research Society, 2026) Ergenecosar, Gizem Temelcan; Kocken, Hale Gonce; Albayrak, Inci; Sivri, Mustafa
Parametric programming is one of the notable approaches to expressing the uncertainties encountered in real life. Many studies express the parameters of the objective function and right-hand side parametrically, but only a few include the parametric coefficient matrix of the constraints. This paper examines the feasibility and optimality conditions of the simplex table and proposes a simplex-based algorithm (dual-simplex, generalized-simplex, or primal-simplex). In the solution process, each case is considered independently through the mathematical analysis of simplex multipliers. Distinct numerical examples illustrate each case to demonstrate the algorithm's implementation.
Resting-State EEG Power and Machine-Learning Classification in Adult Males with Gambling Disorder
(Frontiers Media SA, 2026) Cinaroglu, Metin; Yilmazer, Eda; Ulker, Selami Varol; Tarlaci, Sultan
Background: Gambling disorder (GD) is a behavioral addiction sharing neurobiological features with substance use disorders, yet objective biomarkers remain limited. This study examined resting-state EEG power and applied machine learning to identify potential electrophysiological markers of GD. Methods: Resting eyes-closed Electroencephalography (EEG) was recorded from 47 individuals with GD and 32 healthy controls. Absolute and relative power across delta (1-4 Hz), theta (4-8 Hz), alpha (8-13 Hz), and beta (13-30 Hz) bands were quantified over eight cortical regions. Group differences and correlations with the South Oaks Gambling Screen (SOGS) were analyzed. Multiple comparisons were controlled using the Benjamini-Hochberg False Discovery Rate (FDR) correction. A Linear Discriminant Analysis (LDA) classifier was trained to differentiate GD from controls based on EEG features. Results: Group differences in EEG power were subtle, with GD showing significantly higher delta power in the left temporal region (p = 0.032, d = 0.43). Within the GD group, greater gambling severity was associated with higher absolute beta power across frontal, parietal, temporal, and occipital regions (r approximate to 0.40-0.50, p < 0.01), and these associations remained significant after FDR correction (pFDR < 0.05). The LDA model using absolute power achieved 73.7% classification accuracy (AUC = 0.74), whereas relative power yielded near-chance accuracy (57.9%). Conclusions: GD is characterized by subtle but meaningful EEG alterations, particularly increased beta activity linked to gambling severity. Multivariate EEG patterns can distinguish GD from controls, supporting the potential of resting-state EEG as a biomarker for clinical assessment and severity monitoring in behavioral addiction.
The Mediating Role of Mental Well-Being in the Effect of Local Food Experience on Destination Loyalty
(Varna University Management-VUM, 2026) Karahan, Selda; Karacabey, Selda Uca
This study explores the mediating role of mental well-being in the relationship between local food experience and destination loyalty. A mixed-methods design was employed, combining a quantitative survey of 420 domestic tourists in T & uuml;rkiye with in-depth interviews of seven participants. The quantitative findings, analysed through PLSSEM, indicate that local food experiences significantly influence both mental well-being and destination loyalty, and that mental well-being partially mediates this relationship. Qualitative data, analysed through interpretative routine, authenticity, and social benefit. These findings suggest that beyond sensory pleasure, meaningful social interactions and a sense of belonging contribute to well-being and encourage repeat visits. This research offers theoretical insights by integrating eudaimonic and hedonic perspectives of well-being into tourism behaviour, and practical implications for destination managers aiming to strengthen loyalty through culinary experiences.
Employee Benefits Supporting Well-Being at the Intersection of Meaning and Cost: A Sustainability Perspective from Generation Z
(MDPI, 2026) Ilhan, Umit Deniz; Ozkilinc, Damla Nurcan
This study examines how employee benefit practices link employee well-being with financial sustainability in sustainable organization management. Focusing on Generation Z, it investigates the intersection between meaning attributed to employee benefits and managerial decision-making guided by financial rationality. Drawing on human resources management (HRM) and finance perspectives, employee benefits are conceptualized as mechanisms for balancing human-centered value creation and economic resilience. A qualitative design was used, based on semi-structured interviews with 15 Generation Z employees and 20 human resources (HR) and finance managers in T & uuml;rkiye. Data were analyzed through thematic analysis and the Gioia methodology to develop an inductive, multi-level framework. The findings indicate that Generation Z employees view employee benefits as psychosocial resources reflecting justice, autonomy, psychological safety, and value alignment-core components of subjective and eudaimonic well-being-while managers assess them primarily through financial sustainability logics such as cost control and return on investment. Overall, meaning- and cost-oriented perspectives emerge as mutually reinforcing within sustainable organizational systems. The study proposes the Meaning-Cost Balance (MCB) Framework, conceptualizing employee benefits as a strategic management mechanism aligning employee well-being with financial resilience. Positioned at the intersection of HRM and financial sustainability, the framework contributes to sustainable organization management and offers a transferable basis for future comparative research.
Predictive Value of Renal Parenchyma and Pelvic Urine Density on Preoperative Non-Contrast CT in Systemic Inflammatory Response Syndrome (SIRS) After Semi-Rigid Ureteroscopy (Vol 54, 15, 2025)
(Springer, 2026) Ozsoy, Emrah; Kutluhan, Musab Ali; Tokuc, Emre; Kayar, Ridvan; Demir, Samet; Meric, Kaan; Ozturk, Metin Ishak
Validation of the Turkish Yale-Brown Obsessive-Compulsive Scale and Self-Report Version: Psychometric Evidence from Clinical and Non-Clinical Populations
(Taylor & Francis Ltd, 2026) Cinaroglu, Metin; Yilmazer, Eda; Ulker, Selami Varol; Unubol, Huseyin; Sayar, Gokben Hizli
Background Obsessive - compulsive disorder (OCD) is a chronic condition that disrupts functioning and quality of life. The Yale - Brown Obsessive - Compulsive Scale (Y-BOCS; clinician-administered) and its Self-Report version (Y-BOCS-SR) are recognised gold standards for assessing OCD severity. Previous Turkish adaptations have been partial, limited by small samples or by validating only one format. This study provides the first comprehensive Turkish validation of both instruments.MethodsThe sample comprised 950 adults: 158 with DSM-5-TR - diagnosed OCD and 792 non-clinical adults. Translation followed a multi-phase process involving clinicians and a linguistics expert. Participants completed the Turkish Y-BOCS, Y-BOCS-SR, and additional OCD measures (OCI-R, VOCI, PI-R).ResultsThe clinician-administered Turkish Y-BOCS demonstrated excellent reliability (alpha = 0.91; ICC = 0.88) and strong psychometric validity, including a stable two-factor structure distinguishing obsessions and compulsions. The self-report version showed comparably high internal consistency (alpha = 0.90) and strong convergence with the clinician-administered scale. Convergent and criterion validity were robust, with high sensitivity and specificity. Cross-cultural comparisons further supported consistency and generalisability.ConclusionsThis study establishes both the clinician-administered and self-report Turkish Y-BOCS as reliable, valid, and culturally sensitive tools for assessing OCD severity in clinical and research contexts.
An Integrated TFN-Marcos Model for Multi-Criteria Evaluation of Digital Transformation and Maturity in Higher Education Institutions
(Pergamon-Elsevier Science Ltd, 2026) Sahin, Ersin; Gorcun, Omer Faruk; Gorcun, Ozhan; Kolemen, Cansu Sahin; Tirkolaee, Erfan Babaee
Digital transformation has become critical for today's universities' competitiveness and sustainable development. However, the success of digital transformation processes is directly related to investments in technological infrastructure, the accurate measurement of corporate digital maturity, and the effective management of these processes. This study aims to comprehensively evaluate digital maturity and the effectiveness of digital transformation processes in universities with a Multi-Criteria Decision-Making (MCDM) approach. To accurately address the ambiguity arising from uncertainty and expert judgments, Triangular Fuzzy Numbers (TFNs) and the Measurement Alternatives and Ranking according to Compromise Solution (MARCOS) method are combined. In addition, a SWOT analysis is performed to systematically specify the strengths, weaknesses, opportunities, and threats that shape the strategic digital transformation directions of universities. The developed model is then applied to a set of criteria wherein universities are assessed under various dimensions, such as digital infrastructure, human resources, governance, digital culture, and innovation. The findings reveal that universities with high levels of digital maturity can carry out their digital transformation processes more effectively and sustainably. It is also demonstrated that the proposed methodology is able to efficiently deal with strategic planning of digital transformation and maturity in higher education institutions.
Investigating Predictors of Online Dating Motivation
(John Wiley & Sons Ltd, 2024) Hamarat, Hazal
Occupational Health and Safety in Turkish Marine Aquaculture
(Turkish Marine Research Foundation-TUDAV, 2020) Firat, Kursat; Cabuk, Ahmet; Uyumsal, Selcuk
Aging in Turkey
(Faculty of Economics Osijek, 2020) Kilic, Burak; Kilic, Zafer
This study covers the services offered to the elderly, individuals who work in this field, statistical data on aging in Turkey, and similar issues. The data in this study was collected from the literature review and from written sources. In the literature, the concept of age is divided into two: biological and chronological. Although chronological age is the same in all humans, biological age varies according to individuals. Chronological age is the number of years a person has been alive. Biological age is the representation of the biological step as a unit of time. Aging is the state where individuals gradually lose their physical and psychological power. The increasingly elderly population has also caused the academic environment to focus on the field of older people. Moreover, the increasing elderly population has accelerated the process of developing national policies and plans in countries and the process of producing services in line with the developed plans and policies. According to the aging data of the United Nations, there is an increase in the number and proportion of elderly individuals in the world. As a result, in this case, Turkey does not differ, so the elderly population is increasing with each passing day.
An Evaluation on Growth Potential of the Small and Medium Scale Enterprises (SME) in Turkish Furniture Industry
(Academic Journals, 2011) Aksu, Baki; Koc, K. Huseyin; Karademir, Devrim
With its increasingly expanding uses, the furniture industry has become a basic industrial sector in the world, especially in the developed countries, and it represents 2% of the total labour and 2% to 4% of the total production. The global foreign trade of furniture was around $174 billion in 2008. Though it has been growing fast, the furniture industry in Turkey is far from the level in the developed countries. In regard to the Turkish furniture industry, 99% of which consists of small and medium scale enterprises, just like all the other industries, few data are needed to be able to make accurate evaluations. The current conditions in the small and medium scale enterprises have been neatly described in this study. It tries to offer solutions to the problems, analyze the competition opportunities and shed light for future studies by eliminating inadequate data. It is the first study in the field since there has not been such research which covers the whole country except for the regional ones. Also, this project is supplementary to the studies carried out by the researchers on the large-scale enterprises, the whole industry is analyzed.
Investigation the Effects of Treatment Plants on Heavy Metal Levels and Mutagenicity of Wastewaters
(Parlar Scientific Publications (PSP), 2022) Dartan, Guler; Cevik, Mehtap; Aksu, Burak; Can, Zehra Semra; Keskins, Yasar; Yurdun, Turkan; Susleyici, Belgin
Management of wastewater (WW) and protection of the aquatic ecosystem have become a major problem recently. Our objective was to determinate the chemical load and genotoxic potential of WWs before and after advance treatment, and also to foresee whether the pollutants harm the receiving environments where they were discharged. WW samples were collected from influent and effluent of an advanced wastewater treatment plant (AWTP) and discharge of School of Medicine (SoM). Spectrophotometric analyses showed that Pb levels in WWs were found to be over the cut off limit independent from seasonal change. Nitrogen (N) load is detected quite high before the treatment process. According to AMES test, mutagenic effect of AWTP in the absence of liver enzymes were found to be higher in influent (IR: 7.15; TA100) whereas lower in effluent (IR: 4.04; TA100). According to our results, advanced biological treatment might be insufficient in adequate elimination of Pb, N and P. However, further studies are required to validate our results.

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