This study aims to evaluate the performance of the most popular multi-objective programming scalarization methods in the literature for the aircraft sequencing and scheduling…
Abstract
Purpose
This study aims to evaluate the performance of the most popular multi-objective programming scalarization methods in the literature for the aircraft sequencing and scheduling problem (ASSP). These methods are the weighted sum method, weighted goal programming, the ε-constraint method, the elastic constraint method, weighted Tchebycheff and augmented weighted Tchebycheff.
Design/methodology/approach
First, the ASSP for a single runway case was modeled using mixed-integer programming considering the safety and operational constraints and the objectives of the minimization of total delay and total flight time for a sample airport. The objectives were then combined by using the multi-objective programming scalarization methods and various expected times of arrival–departure samples were run for the mathematical models. Finally, the methods were evaluated in terms of the number of nondominated solutions, superior nondominated solution and the average solution time using the Measurement of Alternatives and Ranking according to Compromise Solution method, which is a popular multi-criteria decision-making method.
Findings
Augmented Weighted Tchebycheff was found to be the most effective approach to ASSP in terms of the evaluation criteria followed by Weighted Tchebycheff and then weighted sum method.
Practical implications
The methodology presented in this study could provide more efficient air traffic management in terminal maneuvering areas when multiple objectives need to be optimized.
Originality/value
Although there are studies including the comparison of several scalarization methods for other problems, the comparison of the methods for ASSP has not yet been handled in the literature. As there are several stakeholders in the air traffic system, ASSP includes several objectives, and as a result, this problem can benefit from analyses using this comparison.
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Ali Çağatay Kılınç, Emre Er and Kadir Beycioğlu
The issue of training and appointment of school administrators has consumed substantial attention from educational scholars for several decades. The literature has witnessed a…
Abstract
The issue of training and appointment of school administrators has consumed substantial attention from educational scholars for several decades. The literature has witnessed a growing amount of research effort in investigating and identifying the effective ways of training and appointing school principals. However, there are also political, social and cultural aspects to this endeavour, which potentially influences the practices pertaining to training and appointment of school principals. This chapter represents scholarly efforts to discuss issues on the training and appointment of school administrators in Turkey within its historical and political background. Thus, first, it focuses on the historical journey of the field of educational administration in Turkey. This journey has been categorised under three phases: The Ottoman Era, Early Years of Turkish Republic and the 1950s Onwards. Second, this chapter discusses school principalship in Turkey with a specific focus on political and legal dimensions. Finally, the chapter ends with an overall evaluation of the practices and policies pertaining to school administration curriculum in Turkey.
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Sina Kısacık, Bahriye Eseler and Mary Joan Camilleri
In this article, the impact displacement due to war conditions has on children and their families will be explored with particular focus on Syrian children and families. It is…
Abstract
In this article, the impact displacement due to war conditions has on children and their families will be explored with particular focus on Syrian children and families. It is observed that during local, regional and/or global wars, those who suffer most are the non-combatant civilians, particularly families and children. This phenomenon was observed in 2010 when protests against the economic situation triggered the Arab Revolt. These revolts commenced in Tunisia, eventually spreading to other parts of the Middle East. In the midst of these events the Syrian issue acquired great importance. The demonstrations which began in 2011, aiming at Başşar Al-Asad's resignation from his post in Syria, started as an internal war. However, they eventually led to the involvement of other regional and trans-regional actors, turning into a crisis. The unrest now continues as a low-profile crisis. As in previous wars, civilians, especially families with children, have been the main victims in Syria. The intense fighting and increasing terrorist activities forced most non-combatant Syrian civilians and families with children to flee their country. Most opted to immigrate to safer countries, particularly Turkey and in Europe, searching for better living conditions. This article highlights the bad experiences Syrians had when they immigrated. Existing Turkish and European policies might be amongst various factors which trigger immigrants' bad experiences. They require closer observation so one can better understand the processes in action. Against this backdrop, this paper examines how Syrian children have been affected by the internal war in their country, which has been ongoing since 2011, and how Turkey treats Syrian children as part of its humanitarian-oriented immigration policy.
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Seval Kardeş Selimoğlu and Mehtap Altunel
Along with accounting scandals in the past, academics, researchers, and legislators have focused on fraud. The purpose of this study is to examine postgraduate and doctoral…
Abstract
Along with accounting scandals in the past, academics, researchers, and legislators have focused on fraud. The purpose of this study is to examine postgraduate and doctoral studies, articles, and books about forensic accounting and fraud audit published between the years 2008 and 2018 in Turkey. For this purpose, a total of 96 studies have been examined and 35 of these are master’s theses, 10 of them are PhD theses, 45 of them are articles, and six of them are books. These studies were presented in tables as classified. The studies examined in our research are summarized as year they were published, the author, and the scope of the topic and in terms of results. The conclusions of this study can be summarized as follows: (a) the majority of thesis published about forensic accounting and fraud audit are in 2011 and following years. In addition, most of the theses are focused on forensic accounting review rather than fraud audit. (b) Results in the articles reviewed are in the same direction with theses. (c) There are very few books about fraud audit and forensic accounting. One of them is related to fraud audit, while the rest of them are related to forensic accounting and forensic accounting profession. We suggest extending the scope of the study and making to other countries.