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The purpose of this study is to develop a holistic optimization model for an integrated sustainable fleet planning and closed-loop supply chain (CLSC) network design problem under uncertainty.

A novel mixed-integer programming model that is able to consider interactions between vehicle fleet planning and CLSC network design problems is first developed. Uncertainties of the product demand and return fractions of the end-of-life products are handled by a chance-constrained stochastic program. Several Pareto optimal solutions are generated for the conflicting sustainability objectives via compromise and fuzzy goal programming (FGP) approaches.

The proposed model is tested on a real-life lead/acid battery recovery system. By using the proposed model, sustainable fleet plans that provide a smaller fleet size, fewer empty vehicle repositions, minimal CO₂ emissions, maximal vehicle safety ratings and minimal injury/illness incidence rate of transport accidents are generated. Furthermore, an environmentally and socially conscious CLSC network with maximal job creation in the less developed regions, minimal lost days resulting from the work's damages during manufacturing/recycling operations and maximal collection/recovery of end-of-life products is also designed.

Unlike the classical network design models, vehicle fleet planning decisions such as fleet sizing/composition, fleet assignment, vehicle inventory control, empty repositioning, etc. are also considered while designing a sustainable CLSC network. In addition to sustainability indicators in the network design, sustainability factors in fleet management are also handled. To the best of the authors' knowledge, there is no similar paper in the literature that proposes such a holistic optimization model for integrated sustainable fleet planning and CLSC network design.

While the COVID-19 outbreak affects all aspects of life in the world, there is also a global impact in the field of education. Within the scope of the measures to control the epidemic, distance education was started shortly after the starting of the spring semester in all primary and secondary schools and universities. In this process, architectural design courses, which are one of the most fundamental courses of architectural education, started to be held in online studios. The purpose of this paper is to investigate the evaluations of architecture students about the online design studio courses carried out during the COVID-19 outbreak.

This research used a qualitative approach to evaluate the ideas of first, second, third and fourth grade students of architectural design studios in the host university. A questionnaire was directed to students in order to see their opinions about the online design studio education.

Results shows that students think the most prominent benefit of online studios appears in the use of digital tools. Another important result is that if they are equipped with the necessary tools and given the chance to realize themselves, students can work efficiently even in the distance education process.

This study is important in terms of learning the expectations of students from the online process and to identify important issues that should be considered for the next semesters. In addition, this study will serve as a basis for comparative evaluation of architectural education during and after the epidemic. In this context, the study will shed light on future academic research.

This study aims to categorize user-generated content (UGC) based on the target audience, namely, brand-oriented content (BOC) and community-oriented content (COC). By using the equity theory, this study investigated how personal factors (motivations and self-construal) and brand/product factors (brand luxury) drive members to generate brand-oriented or COC.

Experimental studies were conducted with online brand community (OBC) participants who had been active in an OBC in the past 30 days.

Both in Studies 1 and 3, participants with an independent self-construal generated more BOC relative to COC, whereas participants with an interdependent self-construal generated more COC relative to BOC. In Study 1, extrinsically motivated participants generated more BOC relative to COC, whereas intrinsically motivated participants generated more COC relative to BOC. However, this finding was not confirmed in Study 3. In Study 2, the participants of luxury brand communities generated more COC relative to BOC, whereas participants of affordable brand communities generated more BOC relative to COC. However, this finding was not confirmed in Study 3.

This research provides marketing practitioners with an opportunity to focus on different motivation types in different contexts. The study also helps marketing departments understand the relationship between brand characteristics and UGC types. Finally, the insights of this study can also be useful in a brand extension context.

This study has constructed a better understanding of content generation in OBCs by categorizing UGC based on their target audience.

The intent and aim of the research was to look at a particular house type i.e. a terraced house with four floors, which is one of the popular designs commonly used in the last ten years in mass housing projects in Turkey. There are four alternatives of the type related with the cross-sectional relationship with the ground floor level. Emphasis was placed upon the "semi-cellar type" assuming that even though the level of residential satisfaction gradually increases with the possibility of interpreting the use of the open-plan floor space, and by proposing new design elements to create more adaptable and flexible spaces, the users may still experience dissatisfaction with designs where the space cannot be revised. With the use of a questionnaire, participants judged their own house as a whole and evaluated its uses for different functions and activities, complained in respect of changes required, and finally outlined their plans for the future. Despite the high level of satisfaction with having a garden (a unique characteristic in apartment-saturated Ankara), the aspect of dissatisfaction mostly referred to was the kitchen-garden relationship (or lack thereof). The residents, especially the older ones, were generally dissatisfied with the multi-storey design of their house. They prefer to remain on the backyard level without changing floors in different seasons. Besides, the users spending the longest time in the house complained more than the others and the people spending variable time in the house stated that they preferred to change the floors in different seasons. As compared to larger families, the smaller families were more likely to change floors.

The purpose of the study is to examine the relationship between the COVID-19 pandemic and international student mobility from an alternative perspective and to reveal descriptive findings.

This study follows qualitative research methodology. In accordance with the purpose of the study, the data were collected by the literature review and then it was analyzed by the descriptive analysis method. The effect of the COVID-19 pandemic on international student mobility and the relationships between these variables are explained by tables and classifications.

According to the findings obtained, the restrictions in physical student mobility and shutdown are observed as the biggest challenges that occurred in higher education during the COVID-19. On a global scope, international student mobility has experienced a major break. Physical campus life is still on standby. Online higher education does not give any campus life as before. Students cannot benefit form city's or country's facilities when studying online at home country. The collaboration between university and business has been declined and this is even more discouraging for international students. The hybrid education model produced an intermediate solution in this period. On the other hand, the rise of online education has created new techniques for higher education. University students who cannot go abroad attend different countries lectures and education programs. But also a new challenge has come as the access of online platforms in under developing countries university students. Online education system also discussed in terms of creating inequality in higher education.

This study focused on student mobility and not focused about academic mobility.

It is seen that the traditional higher education system has been adapted into online distance higher education system since COVID-19 crises began globally. On the other side, it is observed that most of studies have focused the effect of COVID-19 on university students based on the transition to online education. When considering the effect of pandemic process on the mobility of international students and higher education, the authors can suggest policy makers to develop new higher education protocols and teaching models supporting key issues (economic, social, health, education and equalization) in the long-term. Higher education institutes have been able to produce creative and innovative solutions for both education and communication during the pandemic process.

University students who cannot go abroad attend different countries lectures and education programs. But also a new challenge has come as the access of online platforms in under developing countries university students. Online education system also discussed in terms of creating inequality in higher education.

This study provides a new perspective for international student mobility in the context of COVID-19 pandemic. This is an emerging issue for the literature. This study is original with its approach to the subject from a global perspective through reviewing the studies of different countries. This study points out key variables for determining the effect of COVID-19 on international student mobility for future studies. When employing quantitative research models, the current key variables can guide them.

This research solicits the opinions of the residents of the Keçiören district of Ankara, Turkey, in order to learn their preferences about their local postmodern environment where the municipality forces all contractors and architects to adhere to strict planning laws requiring Turkish folk and Islamic architectural references. The Municipality of Keçiören, as an agent of civil power, manages the architectural and urban transformation of the area from a district formerly composed of squatter housing to one comprised of, in the words of Robert Venturi, “decorated sheds,” in an effort to create a different looking environment rich in nostalgia and excitement. In this research, a total of 7 different sets of apartment façades were analyzed, with each set comprising three examples each of minimum complexity (representing the former condition of the district), intermediate complexity (representing “high” architecture designed by an architect, which does not exist in the district) and maximum complexity (representing the present postmodern condition of the district). The main hypothesis of the study was that preference rates would be high for intermediately altered “high style” houses by showing the existence of a U-shaped relationship between preference and complexity. That is, façades representing an intermediate level of complexity would be favored over less complex and more complex façades. It was also assumed that there would be a difference in the ratings of different age groups. A questionnaire was carried out with 50 adults (aged 30-45) and 50 high school students (aged 18-20) of Keçiören, who were asked to rate a total of 21 photographs from 7 apartment complexes with the help of a five-point semantic differential scales under three headings: preference, complexity and impressiveness. The results proved the existence of a U-shaped relationship between preference and complexity. On the other hand, younger respondents, compared to older respondents, gave more favorable ratings to the physical qualities of the photographed buildings.

This study aims to investigate the impact of toxic leadership, organizational justice and organizational silence on hospital employees' intention to leave their jobs.

A questionnaire survey was conducted with permanent and contractual employees of a university teaching hospital, including nurses, medical assistants, health technicians and clerical staff. Structural equation modeling was used to develop and test the model.

The findings reveal that toxic leadership is directly and negatively related to organizational justice, while all dimensions of organizational silence and the intention to leave are positively related. In this model, the coefficients of the relationships are found to be higher, almost doubling in permanent employees than in contracted employees, except for the relationship between toxic leadership and silence to protect the organization. This exception lies in the fact that permanent workers with long-term employment have been dealing with the managers for many years.

The model can be extended with counterproductive behavior, work performance and satisfaction measures and work stress and compared with different sectors using higher sample volumes.

In the human-centered health-care industry, it is essential to know the way leadership behaviors guide health-care professionals. The negative leadership behaviors can negatively affect both employees' self-esteem and their attitudes toward patients and their relatives. The results of the present study are expected to contribute to the development of more effective manager selection and promotion policies by policy-makers as well as the determination of short- and long-term employment policies.

Customer orientation (CO) means meeting customers’ needs better than competitors. Competitor orientation means using and acting upon the knowledge of competitors. Thus, the main aim of this study is to analyze the effects of environmental competitiveness on export performance by examining the moderating roles of these variables.

Based on data from 5,000 firms from a survey run in 2021 in Turkey facilitated by the Chamber of Commerce, the authors tested their hypotheses using partial least squares structural equation modeling and correlation analysis.

The results show that competitor orientation positively affects the relationship between a competitive environment and export performance. However, the authors do not find evidence of a significant effect on CO.

Service sector managers should sacrifice customers to gain export market share in favor of superiority with competitors.

Prior research has yet to emphasize the importance of competition intensity in export performance for service-logistics firms. However, the environmental competitiveness–performance relationship is better explained with the help of these test results and the two additional moderators suggested in this work. Moreover, the export performance indicators were gathered from an independent source.

This study aims to explain the role of health on economic growth for OECD countries in the context of sustainable development. Accordingly, the study investigates the relationship between health and economic growth in OECD countries.

This study employed cluster analysis and econometric methods. By cluster analysis, 12 OECD countries (France, Germany, Finland, Slovenia, Belgium, Portugal, Estonia, Czech Republic, Hungary, South Korea, Poland and Slovakia) were classified into two clusters as high and low health status through health indicators. For panel threshold analysis, the data included growth rates, life expectancy at birth, export rates, population data, fixed capital investments, inflation and foreign direct investment for the period of 1999–2016.

The study determined two main clusters as countries with high health status (level) and low health status (level), but there was no threshold effect in clusters. It was concluded that an increase in the life expectancy at birth of countries with higher health status had no significant impact on economic growth. However, the increase in the life expectancy at birth of countries with lower health status influenced economic growth positively.

This study used data that including period of 1999–2016 for OECD countries. In addition, the study used cluster analysis to determine health status of countries, and then panel threshold analysis was preferred to explain significant relations.

This study showed that the role of health on economic growth can change toward country groups as higher and lower health status. It was proved that higher life expectancy can influence economic growth positively in countries with worse or low health status. In this context, developing countries, which try to achieve sustainable development, should improve their health status to achieve economic and social development at the same time.

This study aims to determine the effects of three different carrier system materials (laminated wooden beams, post-tensioned concrete beams and steel beams) used widely in interior spaces on the perceptual evaluations of respondents.

The large opening Olympic swimming pool space was chosen as the research environment. A total of 376 university graduates participated. After experiencing the 360-degree virtual images of the experimental spaces, a “spatial perception” questionnaire was applied to these respondents.

The spaces using the laminated wood beams in the carrier system were perceived as warmer, lighter, more attractive, more spacious, more informal, closer, more well-planned, freer, simpler, more peaceful, more exciting, and uncrowded compared to the spaces that used post-tensioned concrete beams and steel beams. The architect respondents made more negative perceptual evaluations for all the adjective pairs compared to the respondents in the other professional groups. Respondents who were males, and in the 26–35 years of age group, perceived more positively the physical environmental factors of the virtual swimming pools compared to females, and the 36 years of age or above age group.

The results set forth that the structural elements of buildings, such as ceilings, walls and furnishings, were not only systematic elements used in the formation of the structure, they were also important environmental factors in the perceptual evaluation of the space.