İstanbul Gelişim Üniversitesi Kurumsal Açık Erişim 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
Empowering impact: the influence of charismatic leadership via corporate social responsibility on employee quality of life in hotels
(Emerald Group Publishing Ltd., 2025) Salem, Islam Elbayoumi; El Gamil, Rehab Ahmed Mohamed; El-Said, Osman Ahmed; Youssif, Marwa
Purpose – Hotel management and academia are increasingly interested in corporate social responsibility (CSR)
and charismatic leadership. In this context, the presentstudy examines how charismatic leaders affect employee
quality of life through CSR practices in hotels.
Design/methodology/approach – The survey encompassed employees working at either three-star or five-star
hotels in Oman. The model was tested using data gathered from 396 hotel employees.
Findings – Results showed that charismatic leadership positively affects CSR-induced intrinsic and extrinsic
attributions. CSR positively affected task significance and intrinsic quality and negatively affected turnover
intention. Quality of life predictors had a considerable impact, with intrinsic quality and turnover intention
standing out. There was no significant effect of task significance on quality of life. The relationship between
charismatic leadership and CSR was stronger for employees in five-star hotels and weaker for employees in
three-star hotels. The CSR role mediates the relationship between charismatic leadership and quality of life.
Practical implications – The results indicate that charismatic leaders exert a substantial impact on employees’
attributions of CSR. Upper-level management must emphasize fostering the cultivation of charismatic
leadership attributes among non-charismatic leaders as a means to enhance employees’ perceptions of CSR.
Originality/value – Few studies have focused on analyzing employees’ perceptions of CSR activities on a micro
level. Investigating CSR phenomena in the context of internal stakeholders, especially employees, is very rare.
Exploration of soliton solutions and modulation instability analysis for cold bosonic atoms in a zig-zag optical lattice in quantum physics
(Springer Science and Business Media B.V., 2025) Kopçasız, Bahadır
This paper investigates the widely used zigzag optical lattice prototype for cold bosonic atoms.
This prototype generally represents nonlinear waves in
quantum physics. To investigate the soliton solutions of
the offered equation, we consider two analytical solution methods. The first is a new version of the generalized exponential rational function method (nGERFM),
and the second is the G
G2
-expansion function method.
The nGERFM facilitates the generation of multiple
solution types, including singular, shock, singular periodic, exponential, combo trigonometric, and hyperbolic solutions in mixed forms. Thanks to the G
G2
-
expansion function method, we obtain trigonometric,
hyperbolic, and rational solutions. The modulation
instability of the offered prototype is discussed, with
numerical simulations complementing the analytical
outcomes to better understand the solutions’ dynamic
behavior. The findings are novel and can be useful for
studying bosonic superfluidity, quantum magnetism,
many-body spin dynamics, and Bose–Einstein condensation, among other studies involving ultracold atoms.
These outcomes propose a foundation for future examination, making the solutions effective, manageable, and
reliable for tackling complex nonlinear problems. The
methodologies used in this study are robust, influential,
and practicable for diverse nonlinear partial differential
B. Kopçasız (B)
Department of Computer Engineering, Faculty of Engineering
and Architecture, Istanbul Gelisim University, Istanbul, Turkey
e-mail: bkopcasiz@gelisim.edu.tr
equations; to our knowledge, these methods of investigation have not been explored before for this equation.
Infation and consumption inequality
(Springer Nature, 2025) Daşdemir, Esat
This study investigates the relationship between infation and consumption inequality in the Turkish economy. It utilizes data from household budget and consumption surveys conducted between 2002 and 2023. Lorenz curves and Gini coefcients
were calculated to measure consumption inequality across various income and
consumption groups, and these metrics are introduced to the literature. The fndings indicate that increases in the consumption share of upper-income groups tend to
coincide with periods of heightened infation. The results further suggest that price
increases in specifc categories of goods and services can intensify consumption
inequality within those categories. Based on the analysis of 12 goods and services
groups in the Turkish economy, the presence of both absolute and relative infation
in a category is found to increase consumption inequality. In particular, relative
price increases are associated with a more pronounced rise in inequality. While a
one-unit increase in the infation rate of a category raises consumption inequality by
0.12%, a relative increase in that category’s price raises it by 4.48%.
Comprehensive investigation on microstructure, electrical/dielectric and magnetic features of novel equimolar Co3-4x(MnxFexNixCrx)O4 (x = 0.05, 0.10, and 0.15) nanoparticles
(Elsevier Ltd, 2025) Almessiere, M. A.; Baykal, A.; Slimani, Y.; Shirsath, Sagar E.; Gondal, M. A.; Ali, A.; Mihmanlı, Ahmet
The main goal of this study is to understand the influence of Mn, Ni, Fe and Cr multi substitution on structural,
dielectric, and magnetic properties of Co3O4 nanoparticles (NPs), which have been synthesized via sol-gel synthesis. The results revealed the successfully synthesized multi-substitution spinel oxides through X-ray powder
patterns. DXRD are between 14 and 31 nm. AC conductivity exhibited strong temperature (T) and frequency (f)
dependence, reflecting mechanisms dominated by interfacial polarization and polaronic conduction. The
dielectric constant demonstrated a Maxwell-Wagner type response, influenced by grain boundary polarization
and localized charge carriers. Magnetic measurements revealed the coexistence of ferromagnetic (or ferrimagnetic) and antiferromagnetic (or paramagnetic) contributions, with an enhancement in ferromagnetic behaviour
attributed to the non-compensated spins, finite size effects, and higher magnetic moments of dopant ions. The
coercivity, magnetization, and remanent magnetization were found to increase with the rise in the concentration
of Fe, Mn, Ni, and Cr doping ions.
Burden of hypertension, diabetes, and hypercholesterolemia in relation to social and behavioral health determinants: Insights from the 2018 Bangladesh STEPS survey
(Elsevier B. V., 2025) Rahman, Mohammad Meshbahur; Farhana, Zaki; Al Noman, Abdullah; Hossain, Nazmul; Kamil, Anton Abdulbasah; Riaz, Baizid Khoorshid
Objectives: Bangladesh is experiencing a significant shift in its epidemiological landscape, moving from a predominance of communicable diseases to an increasing burden of non-communicable diseases (NCDs). This study
aims to identify the risk factors for hypertension, diabetes, and hypercholesterolemia based on the recent STEPS
survey in Bangladesh.
Study design: Secondary cross-sectional study.
Methods: This study analyze the publicly available “National STEPS Survey for Non-communicable Diseases Risk
Factors in Bangladesh 2018” dataset. The sample size was 6875, after cleaning the three phases of dataset.
Frequency distribution, Spatial distribution, Chi-square test, and Logistic regression models were employed in
data analysis.
Results: The nationwide prevalence of NCDs revealed 27.3 % for hypertension, 9.8 % for diabetes, and 30.2 % for
hypercholesterolemia. The NCDs prevalence significantly varied across divisions in Bangladesh, with Barisal
having the highest hypertension (25 %) and Sylhet the lowest (18.1 %). Chittagong led in diabetes prevalence
(12.0 %), while Rangpur had the lowest (4.8 %). For hypercholesterolemia, Barisal topped (34.9 %), and
Mymensingh had the lowest (20.9 %). The significant risk factors of NCDs included age, occupational status,
physical activity, and BMI category. Older age and obesity notably increased significantly (p < 0.05) the odds of
hypertension, diabetes, and hypercholesterolemia, while urban residence increased the odds of diabetes.
Conclusion: Several factors, mostly age, occupational status, physical activity, and BMI category are responsible
for higher prevalence of NCD diseases. The study explores common factors in NCDs and offers regional comparisons, aiding policymakers in focused interventions for specific regions.
