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    A Novel Bivariate Elliptic Fuzzy Membership Function: A Modeling and Decision-Making Tool for Bike Sharing
    (Springer Science and Business Media Deutschland GmbH, 2023) Başaran, Alparslan A.; Başaran, Murat Alper; Demir, Mehmet Ozer
    In this paper, the data set generated by Bike Sharing System (BSS) has been modeled by a proposed method called fuzzy bivariate elliptic membership function that generates membership values between an independent variable and dependent variable whose functional form follows an ellipse since all numerical variables following a cyclic pattern such as season, month, hour, weather situation and so on. Besides, each membership value corresponding to each independent and dependent variable is used to find an aggregate outcome of a dependent variable based on a new decision-making tool. Therefore, how both weather and time combinations have an impact on the dependent variable could be derived. Since there is no built-in membership function available, the data set is used to construct a data-driven elliptic fuzzy membership function. Thus, the Chebyshev inequality based on the correlated variables is used to determine both the a and b parameters of the elliptic function representing 95% of the whole dataset. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
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    Corporate Reputation in Public Relations Research: A Bibliometric Analysis of Trends and Themes (1970-2024)
    (Sage Publications Inc, 2025) Karakaya, Cigdem; Sumer, Fulya Erendag; Demir, Zuhal Gok; Aydogan, Hediye; Demir, Mehmet Ozer; Karaduman, Murad; Karaduman, Sibel
    Corporate reputation is of growing interest in communication studies as an intangible and inimitable asset. The multiple-stakeholder view of reputation is believed to intersect with the responsibility of the field of public relations. This study explores the intellectual landscape of corporate reputation research within public relations by identifying current trends such as the influence of social media and crisis communication on stakeholder relationships. These trends are crucial for understanding how public relations strategies adapt to evolving communication platforms and global crises, directly affecting corporate reputation by shaping public perception and trust. The study systematically examines 10,873 academic publications retrieved from the WoS database using bibliometric analysis. The analysis employs BiblioShiny and VOSViewer due to their advanced capabilities in visualising performance metrics and mapping scientific networks. The findings suggested that social media, crisis communication, and COVID-19 hold significance and are fundamental to the field of public relations in terms of corporate reputation. Keyword co-occurrence network analysis suggested that public relations, corporate reputation, and crisis communication are three clusters that reflect the crucial role of public relations in both cultivating and sustaining corporate reputation, as well as its significance in managing crisis communication effectively. These findings emphasise the necessity for organisations to adopt proactive crisis communication strategies and integrate social media into reputation management. Integrating these topics into public relations curricula can better prepare future professionals to manage corporate reputation in a complex media landscape.
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    Determining factors affecting healthcare service satisfaction utilizing fuzzy rule-based systems
    (Taylor & Francis Ltd, 2016) Demir, Mehmet Ozer; Basaran, Murat Alper; Simonetti, Biagio
    Health communication, which is a multi-attribute concept, is a generic title describing clinical practice. The literature shows that the relation between health communication and healthcare service satisfaction (HSS) has been found to be significant. The main objective of pursuing better health communication is to achieve the best outcome and patient satisfaction where healthcare systems are supposed to deliver. However, the health communication is a complex process. Also, measuring patients' satisfaction is not an easy task since satisfaction is a complex notion with several factors. In this study, questions in the questionnaire directed to patients are factor-analyzed in order to obtain components which are used as independent attributes that will be modeled by fuzzy rule-based systems (FRBS) in order to explain HSS. Utilizing FRBS brings two different advantages, one of which is to use mathematical functions called membership functions for linguistically expressed responses. The second one is to observe the transition among the linguistic values expressed by patients. The four independent variables, namely, doctor-patient communication (DPC), information seeking behavior (ISB), equal behavior and tolerance to cultural differences (TCD) and the dependent variable HSS are employed in the modeling. Although both DPC and ISB have positive effects on HSS, TCD has none. One interesting finding about DPC is that if DPC scores below the average value tend to lower, it does not have a decreasing effect on HSS, which means that if a patient does expect to have average DPC, his or her evaluation on HSS does not lower, which says that if a patient knows that the doctor has a poor communication skill, the patient does not pay attention to this attribute.
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    Global warming communicative actions of publics in Türkiye: Utilizing fuzzy rule based system
    (Cell Press, 2024) Demir, Mehmet Ozer; Demir, Zuhal Gok; Karakaya, Cigdem; Sumer, Fulya Erendag
    The effectiveness of government policies and environmental initiatives to mitigate global warming relies heavily on public support, which is closely tied to public perception and awareness. Despite the scientific evidence communicated, the public remains reluctant to take preventive measures against global warming. The aim of the paper is to investigate the communicative actions of publics proposed as in the situational theory of problem solving to understand publics' communicative actions towards global warming. The paper utilizes a fuzzy rule-based system approach to analyze the communicative actions of publics to reveal non-linear relationships; whereas previous studies mostly used linear statistical analysis. The paper provides a deeper understanding into the interplay between problem recognition, constraint recognition, and involvement in shaping information behavior. The results show that the communicative actions of the publics are at a low-to-moderate level. The paper's interesting finding is the nonlinear effects of constraint recognition on communicative action about global warming. Contrary to the current literature, it was found out that the dominant factor that may convince public to start taking action towards global warming seems to be recognizing being constrained at a moderate level. Based on the results, it is suggested for policy makers and communication strategists to mitigate the negative outcomes of global warming by integrating environmental issues into education at all levels and collaborating with non-governmental organizations for national awareness campaigns which focus on increasing public problem recognition and involvement.
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    The Impact of Sustainable QR Menus on Service Quality and Customer Satisfaction: The Moderating Role of Perceived Risk
    (Mdpi, 2025) Yigitoglu, Vedat; Sahin, Esra; Guneri, Beysun; Demir, Mehmet Ozer
    Technological applications have become increasingly important as competitive tools in the food and beverage industry. However, the effects of quick response (QR) menus, which exemplify sustainable menu practices, on service quality, e-service quality, and customer satisfaction, as well as the moderating role of perceived risk in these relationships, have not been sufficiently explored. To address this gap, data were collected through a face-to-face survey from 508 participants at three full-service casual dining establishments in the city center of Antalya, T & uuml;rkiye, between 10 May and 26 June 2024. The research hypotheses were tested using structural equation modeling. The analysis revealed that technology-based service innovation and service quality significantly influence customer satisfaction, while e-service quality impacts customer satisfaction indirectly through service quality. Furthermore, when examining the moderating effect of perceived risk, it was found that perceived risk does not moderate the relationship between technology-based service innovation and customer satisfaction. In conclusion, the study presents managerial and practical implications that underscore the effect of technological innovations in enhancing service quality and customer satisfaction in the food and beverage sector.
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    The interplay between progressivism and logical fallacy: implications for climate change communications
    (Iop Publishing Ltd, 2025) Demir, Mehmet Ozer; Demir, Zuhal Gok; Erendag Sumer, Fulya; Karakaya, Cigdem; Aydogan, Hediye; Arslan, Burak
    The spread of fake news and the influence of moral reasoning on public opinion present significant challenges in climate change communication. This study examines how the ideological underpinnings of conservatism and liberalism, combined with logical fallacies and fake news, shape public perceptions of climate change. Using the Moral Foundations Questionnaire (MFQ), and a quantitative online survey of 288 participants, we assess whether individuals identified as liberal or conservative are more prone to accept flawed reasoning. Results show that conservatives are significantly more susceptible to a broader range of logical fallacies, including emotional manipulation, appeals to authority, and oversimplified arguments-patterns commonly associated with fallacies such as Argumentum ad hominem, Straw Man, and Tu quoque. Meanwhile, liberals, though less vulnerable overall, are particularly influenced by specific fallacies which align with their moral focus on harm and fairness. The findings offer new insights into the intersection of moral psychology, political ideology, and misinformation, with practical implications for designing ideologically tailored climate change messages.
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    The Politics of Sustainable Consumption: A Fuzzy Logic Approach to Understanding How Political Orientation Shapes Environmental Attitudes and Behaviors
    (Springer Science and Business Media Deutschland GmbH, 2025) Başaran, Murat Alper; Demir, Mehmet Ozer
    The relationship between political orientation and sustainable consumption has been a focal point of research in environmental psychology, sociology, and behavioral studies. This body of work highlights how political beliefs significantly shape attitudes and behaviors toward environmental sustainability. Studies consistently demonstrate that individuals with left-leaning or liberal political orientations are more likely to engage in pro-environmental behaviors, such as sustainable consumption, due to stronger environmental concerns and a greater acceptance of climate science. In contrast, those with right-leaning or conservative orientations often exhibit skepticism toward environmental issues, influenced by system-justification beliefs, individualism, and resistance to regulatory interventions. Thus, environmental issues, particularly climate change, are politized. Political polarization has led to divergent perceptions of climate risks, with liberals more likely to adopt sustainable practices and conservatives more resistant to such behaviors. Additionally, materialistic values and economic priorities often conflict with sustainable consumption, particularly among politically conservative groups. Overall, the literature underscores the critical role of political orientation in shaping environmental attitudes and behaviors, offering insights for policymakers and advocates aiming to foster broader engagement in sustainable consumption. This paper aims to validate political orientation and attitude towards environmental issues, mainly on sustainable consumption. The research forms the most influential policy combination of Progressivism and Conservatism based on three fuzzy models, Mamdani, Sugeno, and ANFIS, to reach sustainable consumption ideas that is supported by the consumers. Note that a high level of Progressivism has the most influential impact on sustainable consumption. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.