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The purpose of this research is to evaluate the effectiveness of different repair patch materials in reducing the stresses at the crack tip of a 2024-T3 aluminum plate. This involves a numerical analysis using the finite element method (FEM) to estimate the reduction in the J-integral value, with the goal of identifying how various parameters related to the patch materials, adhesive properties and loading conditions influence the structural integrity of the repaired plate.

The methodology of this research involves conducting a numerical analysis using the FEM to estimate the reduction in the J-integral value at the crack tip of a 2024-T3 aluminum plate. Three types of patches – metal, composite and functionally graded material (FGM) – were examined under tensile loading conditions, and Adekit-A140 adhesive was used to bond these repair patches to the aluminum plate.

The analysis considered various parameters, including crack length, the nature of fibers in the composite material, the gradation exponent for FGM patches and the nature of the face in contact with the adhesive for the FGM patch. Additionally, stress analysis was conducted, examining the J-integral values for the plate, shear stress in the adhesive layer and peel stress in the composite patch. The findings highlight that modifying the nature of the repair patch used can significantly enhance the structural integrity of the repaired plate.

The study analyzed J-integral values, shear stress in the adhesive and peel stress in the composite patch. Various parameters, including crack length, fiber type, gradation exponent and adhesive contact face nature, were considered. Results demonstrate that the J-integral value can be significantly reduced by altering the repair patch type, highlighting the effectiveness of customized patch materials in enhancing structural integrity.

A shift from a medical model to a social model of including learners with disabilities has occurred over the past 25 years (Stella, Forlin, & Lan, 2007). This shift has impacted both preservice teacher preparation and in-service teacher professional development. This chapter utilizes a conceptual framework built on the work of Forlin and colleagues (Forlin, Loreman, Sharma, & Earle, 2009; Sharma, Forlin, Loreman, & Earle, 2006; Stella et al., 2007) to guide teacher preparation and professional development. This conceptual framework provides a model for (1) addressing attitudes and perceptions; (2) increasing knowledge of disability policies, laws, and evidence-based practices for providing instruction in inclusive settings; (3) and increasing experiences with individuals with disabilities, including experiences within inclusive settings. In addition, the framework incorporates aspects of the context within which inclusion is to occur. Implications include recommendations for teacher training and professional development to improve inclusive education for learners with LID.

This study proposes a model that influences customer citizenship behavior during COVID-19, and empirically tests the effects of fast-food restaurant customers' perceptions of justice (price and procedural justice) on trust; trust on satisfaction and loyalty; and trust, satisfaction and loyalty on customer citizenship behavior. Furthermore, it was questioned whether there was a disparity between customer expectations based on the restaurant's image and consumption experience.

The data were gathered from customers of fast-food restaurants in the shopping centers in Turkey. The data set, which included 437 valid questionnaires, was subjected to CFA for validity and reliability, SEM analysis for hypothesis and paired sample t-Tests for the research questions.

The findings of the study indicate that perceived justice affects customer trust, which, consequently, affects customer loyalty and satisfaction during the COVID-19 period. Findings also demonstrate that, while customer loyalty and trust increase customer citizenship behavior, customer satisfaction alone is insufficient to increase customer citizenship behavior. The study also shows that during the COVID-19 period, fast-food restaurants should have raised awareness of employees’ fair behaviors toward the customers and provided additional services to differentiate themselves in the market. Also, it indicates that customer expectations related to price, cleanliness and professional appearance of staff are not met after taking service.

No research has been found in the literature focusing on the expectations, justice, trust, satisfaction, loyalty and citizenship behaviors of fast-food restaurant customers in the COVID-19 pandemic process. Therefore, the results can fill the gap in relevant literature by testing the relationships between justice, trust, satisfaction, loyalty and citizenship during the pandemic and provide inferences for fast-food business owners.

In this study, the aim is to address the void in the comparative literature of criminology and criminal justice by investigating public attitudes toward law enforcement in a rapidly developing country, Turkey.

Three different models of satisfaction with law enforcement, the demographic model, the quality of life model and the experiential model are subjected to empirical scrutiny in the context of policing in Turkey. In line with extant research on satisfaction with law enforcement in the West, all three models significantly explain the variation of satisfaction with law enforcement across a random sample of 6,713 individuals living in urban and rural parts of Turkey. Specifically, the quality of life model and the experiential model had considerable impact on public satisfaction with law enforcement and in general, all three models produced results in the predicted direction.

Overall, the findings suggest the robust nature of the integrated demographic, quality of life, and experiential models in explaining public satisfaction with law enforcement. In the demographic model, however, income and education had significant negative impact on global satisfaction with law enforcement. Considering the fact that more educated and well off citizens are likely to value freedom more and that law enforcement may represent an oppressive part of a democratic government, this might account for the reaction of higher socioeconomic classes to the power distance between the state, the police in particular, and civil society.

In terms of policy recommendations, to the extent that community policing is regarded as a set of strategies for improving the quality of police‐citizen encounters and reforming police organizations, these findings lend support for the potential of community policing in Turkey.

This paper aims to present an example of the measurement of airport efficiency, a topic of great interest in civil aviation today. The methodology used is data envelopment analysis (DEA) and the Malmquist Index. The calculation of airport efficiency with up-to-date data for each period is of great importance in the context of sustainability. The study selected ten airports with high air traffic in Turkey as the sample set. The objective of this study is to evaluate the current state of airport efficiency, identify the sources of inefficiency and make appropriate policy recommendations based on the findings obtained.

The study is based on DEA and Malmquist Index Analysis. The number of personnel and terminal size data of ten selected decision-making units (DMU) are used as inputs, while passenger, cargo and aircraft traffic data are used as outputs. A five-year period, spanning from 2018 to 2022, is considered as the data set in the study.

Upon analysis of the data from the ten airports included in the study, it was found that the current input-output combination yielded efficient results, with the exception of certain characteristics, such as the impact of seasonal conditions or tourism. Concurrent with the growth in aircraft, passenger and freight traffic, the number of personnel employed at these airports has also increased. It was concluded that technological efficiency is of paramount importance for each airport, and that investments in technology should be increased.

A separate assessment was conducted for each of the ten airports included in the study sample. Each airport was evaluated in terms of its strengths and weaknesses, and areas of low efficiency were identified. Consequently, more general conclusions were reached than airport-specific evaluations.

In order to ensure the long-term sustainability of the sector, it is essential that the efficiency measurements of airports are calculated using up-to-date data on a regular basis. The results obtained from these calculations provide guidance for the strategic plans to be implemented in the long term, as well as for the solution proposals for operational problems. In this context, this study not only provides information to policymakers and airport managers about the current situation, as it includes recent data, but also contributes to the literature in this sense, as it includes policy recommendations.