İstanbul Gelişim Üniversitesi Kurumsal Akademik Arşivi
DSpace@Gelişim, İstanbul Gelişim Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Exploring the Influence of Employee Personality on Incivility and Innovative Deviance Among Frontline Hotel Employees: The Mediating Role of Perceived Stress
(MDPI, ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND, 2024) Alola, Uju Violet; Egeli, Serdar; Echebiri, Chukwuemeka
This study looked at the complex interactions between agreeableness as a personality trait
and five deviant workplace behaviours (including experienced incivility and innovative deviant
behaviour) and the role of perceived stress as a mediating mechanism in front-of-house hotel workers.
The study adopted a convenience sampling approach to improve access to frontline employees in
the hotel sector in Turkey; a total of 500 questionnaires were collected, and 360 were usable. A
partial least square structural equation modelling (PLS-SEM) was used to test the conceptual model
and hypothesised associations. The findings show that agreeableness has a negative association
with perceived stress and experienced incivility but is positively correlated with innovative deviant
behaviour. In contrast, perceived stress is negatively correlated with innovative deviant behaviour
but positively associated with experienced incivility. We also found that perceived stress serves as a
mediating mechanism in this relationship. According to the findings, the personalities of employees
and how they perceive stress could shape how it impacts workplace deviance, depending on whether
it is constructive or destructive. The study’s findings have significance for managerial policies aimed
at building a collaborative and innovative workplace and understanding how personality traits and
perceived stress impact broader workplace deviance.
The Diagnostic Value of circFBXW7, circABCB10, and circ0103552 Levels in Breast Cancer
(MDPI, ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND, 2024) İlhan, Burak; Ender, Şenol; Kılıç, Berkay; Üçüncü, Muhammed; Serilmez, Murat; Yasasever, Ceren Tilgen; Soydinç, Hilal Oğuz; Kuras, Sibel; Erdoğan, Bekir; Alsaadoni, Hani; Karanlık, Hasan; Bademler, Süleyman
Despite advances in cancer treatment, breast cancer (BC) remains one of the most common
cancers affecting women worldwide. This study aimed to determine serum circFBXW7, circABCB10,
and circ0103552 levels and compare BC patients and healthy controls to investigate their roles in
the molecular mechanism of BC and the significance of these circRNAs in BC diagnosis. The study
group consisted of 92 patients with BC and 31 healthy controls. Total RNA was isolated from
serum samples. Following total RNA, complementary DNA was synthesized from this material.
Following complementary DNA analysis, the circRNA levels were analyzed by the qRT-PCR method.
Expression levels were evaluated in ∆Ct values. High ∆Ct values of circFBXW7 and circ0103552 and
low ∆Ct values of circABCB10 were correlated with BC diagnosis (circFBXW7, p = 0.043, r = 0.183,
circ0103552, p < 0.001, r = 0.321, circABCB10, p = 0.001, r = −0.291). According to Fold Change (FC)
values, circFBXW7 (FC = 0.30) and circ0103552 (FC = 0.26) showed low expression in the patient group
compared to the control group, while circABCB10 (FC = 11.09) showed high expression (p < 0.05, for
all comparisons). We think that our study is one of the rare studies investigating the relationship
between BC and serum circRNA levels. This study concludes that the significant downregulation of
circFBXW7 and circ0103552 and the upregulation of circABCB10 are directly related to the diagnosis
of BC and can be used for diagnosis, but further studies are needed to elucidate the molecular
mechanism of the relationship between circRNAs and BC.
A Smooth Global Path Planning Method for Unmanned Surface Vehicles Using A Novel Combination of Rapidly Exploring Random Tree and Bézier Curves
(MDPI, ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND, 2024) Türkkol, Betül Z.; Altuntaş, Nihal; Çekirdek Yavuz, Sırma
Developing autonomous navigation techniques for surface vehicles remains an important
research area, and accurate global path planning is essential. For mobile robots—particularly for
Unmanned Surface Vehicles (USVs)—a key challenge is ensuring that sharp turns and sharp breaks
are avoided. Therefore, global path planning must not only calculate the shortest path but also
provide smoothness. Bézier Curves are one of the main methods used for smoothing paths in the
literature. Some studies have focused on turns alone; however, continuous path smoothness across the
entire trajectory enhances navigational quality. Contrary to similar studies, we applied Bézier Curves
whose control polygon is defined by an RRT path and thus avoided a multi-objective formulation. In
the final stage of our approach, we proposed a control point reduction method in order to decrease
the time complexity without affecting the feasibility of the path. Our experimental results suggest
significant improvements for multiple map sizes, in terms of path smoothness.
Addition of Subset and Dummy Variables in the Threshold Spatial Vector Autoregressive with Exogenous Variables Model to Forecast Inflation and Money Outflow
(MDPI, ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND, 2024) Setiawan, Setiawan; Sohibien, Gama Putra Danu; Prastyo, Dedy Dwi; Akbar, Muhammad Sjahid; Kamil, Anton Abdulbasah
The TSpVARX model can be used in inflation and money outflow forecasting by accommodating the reciprocal relationship among endogenous variables, the influence of exogenous variables,
inter-regional linkages, and the nonlinearity of the relationship between endogenous and predetermined variables. However, the impact of some events, such as Eid al-Fitr and fuel price adjustments,
still cannot be accommodated in the TSpVARX model. This condition causes inflation and money
outflow forecasting using TSpVARX to be unsatisfactory. Our study is to improve the forecasting
performance of the TSpVARX model by adding subset and dummy variables. We use a 12th lag subset
variable to capture seasonal effects and a dummy variable to represent fuel price changes. These
additions enhance the model’s accuracy in forecasting inflation and money outflow by accounting
for recurring patterns and specific events, like fuel price changes. Based on the RMSE values of
the training and testing data, we can conclude that forecasting inflation and money outflow using
TSpVARX with the addition of subset and dummy variables is better than the regular TSpVARX. The
inflation and money outflow forecasting generated after the addition of subset and dummy variables
are also more fluctuating as in the movement of the actual data.
Emotional Labor in Aviation: A Phenomenological Research on Cabin Crew
(MEHMET AKIF ERSOY UNIV, ANTALYA BURDUR YOLU, BURDUR MERKEZ, BURDUR 15030, Turkiye, 2024) Mumlu Karanfil, Seda; Çoban, Ramazan
The aim of this study is to examine the factors affecting the emotional
labor behavior of cabin crew in aviation and the results of emotional labor.
For this aim, qualitative research method was used to examine the research
topic in detail. The research was guided by using the phenomenology
design, which is one of the qualitative research designs. The research
sample was determined according to purposeful sampling and saturation
point methods. In this context, the sample of the research consists of 11
cabin attendants working in different airline companies in Turkey.
Interview method was used as a data collection tool. The data obtained
was subjected to content analysis with an inductive and descriptive
approach. As a result of the content analysis, the research findings were
grouped under two main themes as factors affecting emotional labor and
the results of emotional labor. Factors affecting emotional labor behavior
were examined under six sub-themes: organizational factors, individual
factors, demographic features, passenger type, physical work environment
and content of the flight task. The results of emotional labor were
examined under two sub-themes as organizational and individual results.
While organizational results are positive results that increase
organizational performance and create a positive organizational
impression, it has been observed that individual results seen on cabin crew
have positive and negative sides.
