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A combustor design is a particularly important and difficult task in the development of gas turbine engines. During studies for accurate and easy combustor design, reasonable design methodologies have been established and used in engine development. The purpose of this paper is to review the design methodology for combustor in development of advanced gas turbine engines. The advanced combustor development task can be successfully achieved in less time and at lower cost by adopting new and superior design methodologies.

The review considers the main technical problems (combustion, cooling, fuel injection and ignition technology) in the development of modern combustor design and deals with combustor design methods by dividing it into preliminary design, performance evaluation, optimization and experiment. The advanced combustion and cooling technologies mainly used in combustor design are mentioned in detail. In accordance with the modern combustor design method, the design mechanisms are considered and the methods used in every stage of the design are reviewed technically.

The improved performances and strict emission limits of gas turbine engines require the application of advanced technologies when designing combustors. The optimized design mechanism and reasonable performance evaluation methods are very important in reducing experiments and increasing the effectiveness of the design.

This paper provides a comprehensive review of the design methodology for the advanced gas turbine engine combustor.

This study examined the effects of organizational justice and citizen respect to support for democratic policing through self-legitimacy among South Korean police officers.

The authors used survey data from 467 South Korean police officers in 2022. Structural equation model analysis was used to examine relationships between each variable.

This study found a positive relationship between organizational justice and self-assessed legitimacy. Also, citizen respect had a positive relationship with both police officers' self-assessed legitimacy and audience legitimacy. Self-assessed legitimacy had a significant effect on support for democratic policing, while perceived-audience legitimacy did not have a significant effect on support for democratic policing.

The current study provides evidence that self-legitimacy affects supporting democratic policing in a non-Western democracy. Additionally, to the best of our knowledge, this study is the first to examine the role of police self-legitimacy as a link between organizational justice and citizen respect and the intended behaviors of police officers toward citizens.

In the face of increasing political polarization worldwide, this study explores whether people create biased perceptions of political knowledge and how this affects their selection and evaluation of political content on YouTube.

For this study, an online experiment was conducted with 441 panels of South Korean respondents. In the first phase, participants answered 10 questions designed to capture their level of objective political knowledge, and for each question, they indicated whether they had responded to that question correctly as a means of measuring their subjective political knowledge. In the second phase, two types of YouTube thumbnails were presented to represent progressive and conservative claims on two controversial political issues, and participants rated and selected the content they would like to see.

Participants with low political knowledge perceived their knowledge as more than it really was. In contrast, participants with high political knowledge perceived their political knowledge as less than it really was. This biased perception of political knowledge influences respondents' choice and evaluation of political YouTube channel videos.

At a time when political polarization is increasing around the world, this study sought to explore how perceptions of political knowledge differ from actual political knowledge by applying the Dunning-Kruger effect. The authors also used political YouTube channels, whose role in forming public opinion and political influence is rapidly growing, to study the behavior and attitudes of a group of Korean respondents in the media according to their actual and perceived level of political literacy.

The popular uprising in Sri Lanka on July 9th, 2022, led to President Gotabaya Rajapaksa fleeing the country. It represented a stunning culmination of a wave of protests during the recent past. The proximate cause of the uprising was the worst economic crisis that Sri Lanka had experienced since the Great Depression of the 1930s. The breakdown was long in the making since the island nation became the first country in South Asia to take the neoliberal turn in the late 1970s. The dramatic collapse was catalyzed by a sovereign debt crisis with the onset of the COVID-19 pandemic and the war in Ukraine. Nevertheless, like all great revolts, it has led to a counter revolution by the ruling class, including the reconfiguration of the old regime.

We examine the tremendous consequences of recent events, both in terms of Sri Lanka's long history of struggles involving working people and the global unravelling underway. We explore whether Sri Lanka is a harbinger of more global political economic changes to come. The process includes the possibility of systemic resistance to financialization in the scores of countries in the Global South experiencing tremendous debt distress. In this regard, we ask whether Sri Lanka's revolt could yet become a revolution. To frame the potential implications, we turn to a deeper interrogation of classic Marxist theories and concepts.

Participatory budgeting's (PB’s) proponents hope that bringing development projects to historically underserved communities will improve well-being by extending infrastructure and services. This article details the logic connecting PB to well-being, describes the evolution of PB programs as they spread around the world and consolidates global evidence from research that tests hypotheses on PB's impact. The purpose of this paper is to address these issues.

Unstructured literature review and comparative case study across five global regions.

The authors find evidence for PB's impact on well-being in several important contexts, mostly not only in Brazil, but also in Peru and South Korea. They also find that very few rigorous, large-N, comparative studies have evaluated the relationship between PB and well-being and that the prospects for social accountability and PB's sustainability for well-being are not equally strong in all contexts. They argue that PB has great potential to improve well-being, but program designs, operational rules and supporting local conditions must be favorable to realize that potential.

This is one of the few efforts to build theory on where and why the authors would expect to observe relationships between PB and well-being. It is also one of the first to consolidate global evidence on PB's impact.

The purpose of this paper is to present an alternative platform, namely the Metaverse, to enhance and revolutionize the concept of living library experiences. The fourth industrial revolution has disseminated many innovative human experiences since the rapid development of modern technologies, such as artificial intelligence, the Internet of Things, virtual/augmented realities, blockchain, cloud computing and so on. Various combinations of these technologies have triggered newer tools and platforms for human beings. One of these combinations, perhaps the most unique and holistic case, is the Metaverse, which promises to offer immersive experiences for users. Many stakeholders have been discussing alternative applications of Metaverse platforms, and many developers have attempted to optimize this new technology. Libraries, as the central hub of human intellectuality, will not be an exception to Metaverse integration.

The authors undertook a meticulous examination of an extensive array of scholarly works across various databases to construct a comprehensive literature review. This exhaustive exploration encompassed databases spanning disciplines such as education, psychology, sociology, economics, ICT and so on, and included renowned platforms like PubMed, Scopus, and IEEE Xplore, among others.

In this paper, the authors concentrate on an alternative form of libraries: “living libraries,” where people share their experiences, knowledge and wisdom with others like a living book. Moreover, the authors discuss how the Metaverse and living libraries intersect and create an alternative sharing platform. The paper presents several illustrative scenarios for diffusing living libraries into Metaverse platforms. Finally, the paper articulates the possible challenges that this intersection may present to the current condition.

To the best of the authors’ knowledge, this is one of the first papers combining two innovative concepts: Metaverse and living library and suggests alternative scenarios for real-life experiences.

The purpose of this study is to examine the knowledge gap hypothesis in the context of smartphone use for news to understand whether mobile news consumption could bridge or widen the knowledge gap between people of higher and lower socioeconomic status (SES).

The authors examine how smartphone news consumption is associated with the knowledge gap hypothesis by analyzing a survey dataset from Hong Kong. This study focuses specifically on a moderated mediation model in which the indirect effect of mobile news consumption on political knowledge via discussion network heterogeneity is contingent on level of education.

Smartphone use for news/information was positively associated with level of discussion network heterogeneity. The indirect effect of smartphone news use on political knowledge via discussion network heterogeneity was stronger for those with lower levels of education.

This study advances the understanding of the role of smartphone use in contributing to the functioning of deliberative democracy as this use enhances discussion network heterogeneity and general levels of political knowledge. Moreover, our study contributes to the literature on the knowledge gap by not only examining the relationship between smartphone use, discussion heterogeneity, and political knowledge but also taking into consideration individual levels of education.

This study examined how likeminded Facebook comments with incivility and without supporting evidence influence readers' evaluations of the commenter and online political participation intention. This study also investigated whether the indirect effect of exposure to uncivil comments and comments without evidence on online political participation through evaluations of the commenters is contingent on the strength of partisanship.

The study used a 2 (uncivil comments vs civil comments) × 2 (comments without supporting evidence vs comments with supporting evidence) factorial design with a scenario about reading similar viewpoints about the gun control issue in Facebook comments.

The results showed that compared to exposure to civil agreeing comments, exposure to uncivil likeminded comments resulted in higher levels of negative evaluations of the commenters, which in turn decreased willingness to participate in political activities online. Exposure to comments without evidence led to more negative evaluations of the commenters, but it did not significantly influence online political participation. In addition, the strength of partisanship did not significantly moderate the indirect effect of exposure to uncivil comments and comments without evidence on online political participation through evaluations of the commenters.

Although previous studies have demonstrated the significant effects of incivility and reasoned argument, little is known about whether and how people evaluate ingroup members' comments that are uncivil and lacking reasoned arguments. Most of these studies have examined incivility in political contexts, but few have extended the context to the effect of likeminded comments, especially when the comments are uncivil and lack supporting evidence. The current study aims to fill this gap in the literature.