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
The Impact of Financial Institution Quality and Financial Stability on Trade-Adjusted Carbon Emissions: The Moderating Role of Green Innovation and Environmental Taxes
(Multidisciplinary Digital Publishing Institute (MDPI), 2025) Radulescu, Magdalena; Yazıcı, Ayşe Meriç; Toy, Ayşegül; Öztırak, Mesut; Doğan, Mesut
This study analyzes the impact of financial institution quality (FIQ) and financial
stability (FSI) on trade-adjusted carbon emissions (TAE) in G7 countries from 2000 to 2022.
It also examines whether green innovation (GI) and environmental taxes (ET) moderate
this relationship. In the study, long-term coefficient estimations were conducted using
the Seemingly Unrelated Regressions (SUR), Panel-Corrected Standard Errors (PCSE),
and Driscoll-Kraay standard error estimator methods. The results show that GI, ET, FIQ
and FSI variables have a negative and significant effect on TAE. Green innovation and
environmental taxes reduce carbon emissions, while strong financial institutions and
stable financial systems enhance environmental performance by supporting sustainable
investments. The Dumitrescu-Hurlin (D-H) causality test results indicate a unidirectional
causal relationship between these variables to carbon emissions. These results highlight the
significance of integrating environmental policies with financial systems and promoting GI
for sustainable development.
Sensitivity of the Load–Velocity Relationship Variables to Discriminate the Level of Fatigue Induced by Multiple Sets of the Hexagonal Barbell Deadlift Exercise
(NSCA National Strength and Conditioning Association, 2025) Şentürk, Deniz; Akyıldız, Zeki; Janicijevic, Danica; Garcia Ramos, Amador
S‚ ent ¨urk, D, Akyildiz, Z, Janicijevic, D, and Garc´ıa-Ramos, A. Sensitivity of the load–velocity relationship variables to discriminate the
level of fatigue induced by multiple sets of the hexagonal barbell deadlift exercise. J Strength Cond Res 39(4): 407–413, 2025—This
study aimed to evaluate changes in load–velocity (L-V) relationship variables (L0, v0, and Aline) after different fatigue protocols and to
determine their correlation with changes in 1 repetition maximum (1RM). After determining the hexagonal barbell deadlift (HBD)
1RM, 27 resistance-trained men randomly completed 3 sessions that only differed in the activity performed between 2 incremental
loading tests that were performed at the beginning (presession) and end (postsession) of the session: (a) control protocol: no
training; (b) moderate-fatigue protocol: 5 sets of the HBD exercise at 70% 1RM performing half the maximum possible number of
repetitions; and (c) high-fatigue protocol: 5 sets of the HBD exercise performed to failure against the 70% 1RM. Significance was set
at an alpha level of 0.05. The reduction of 1RM (p , 0.001), v0 (p 5 0.014), and Aline (p , 0.001) at postsession was greater for the
high-fatigue protocol, followed by the moderate-fatigue protocol, and finally the control protocol. The changes in L0 did not differ
between the fatigue protocols (p 5 0.372). The percent change in the 1RM at postsession was significantly correlated with the
percent change in Aline (r 5 0.714) and L0 (r 5 0.540), but not with the percent changes in v0 (r 5 0.177). These results suggest that
the L-V relationship variables offer a highly sensitive and practical solution for fatigue monitoring.
Influence of temperature and selenium substitution on electrical and dielectric characteristics of CoFe2O4 nanoparticles
(Elsevier B. V., 2025) Ünal, Bayram; Baykal, Abdülhadi; Almessiere, M. A.; Mihmanlı, Ahmet
This study investigates the influence of Se⁴⁺ ion substitution on the electrical and dielectric properties of CoFe2O4
nanoparticles (CoFe2-4xSe3xO₄ (x ≤ 0.1) (NPs)) synthesized via a hydrothermal method. The electrical and
dielectric characteristics were analyzed using a Novocontrol dielectric impedance analyzer. Results indicate that
activation energies (Ea) remain stable at approximately 600 meV at higher temperatures (T ≥ 45 ◦C) but decrease
significantly at lower temperatures, ranging from 300 meV (x = 0.02) to 20 meV (x = 0.08). A sharp reduction in
DC conductivity, from 1.2 nS/cm (x = 0.04) to 0.27 nS/cm (x = 0.08), suggests enhanced electron mobility at this
substitution level. AC conductivity exhibits strong frequency dependence, increasing from 0.15 nS/cm at 1 kHz to
0.13 μS/cm at 1 MHz for x = 0.08 at room temperature. Dielectric constant (ε′) and loss (ε′′) values exhibit
significant variation with frequency, with ε′ reaching a maximum of 3.95 at 100 Hz for x = 0.08, reflecting
enhanced polarization effects. Se⁴⁺ substitution also increases the real part of the electrical modulus (ReM) to
0.99 and the imaginary part (ImM) to 0.40 for x = 0.10, indicating improved energy storage and dissipation
capabilities. The ImZ/ReZ ratio analysis reveals shifts in conduction mechanisms and polarization effects, with a
notable transition at x = 0.04. Cole-Cole plots suggest multiple relaxation processes influenced by temperature
and substitution levels, with relaxation times decreasing from 13 ms (70 ◦C) to 0.76 ms (120 ◦C) for x = 0.02.
This study highlights the potential of Se⁴⁺-substituted Co-SFs for applications in electronic devices, particularly in
energy storage and dissipation systems, and underscores the need for combined experimental and theoretical
approaches to optimize these materials for advanced technological applications.
The Role of Artificial Intelligence Anxiety in the Relationship Between Organizational Learning and Performance in Organizations
(Ebru Bağcı, 2025) Şeker, Cemile; Kılıçaslan, Semiha; Karalinç, Turgay; Kaya, Aslı
The purpose of this study is to investigate the mediating role of artificial intelligence (AI) anxiety in the relationship between organizational learning and performance. The study sample consists of employees
from the healthcare sector, specifically those employed at a private hospital in Istanbul. Data were obtained from 177 healthcare employees through the
survey method. Statistical analyses were performed
using SPSS 27 software, ensuring a 95% confidence
interval. Initially, a normality test was conducted to
examine the data distribution. Subsequently, a reliability analysis was carried out to ensure the dataset’s consistency, and an exploratory factor analysis
(EFA) was applied to evaluate the factor structure. A
correlation analysis was performed to determine the
relationships between variables, followed by hierarchical regression analysis to assess the mediating
role. The findings of the study demonstrate that AI
anxiety does not have a significant mediating effect
on the relationship between organizational learning
and performance. These results suggest that the impact of AI anxiety on organizational dynamics requires further investigation. Given that AI anxiety can
adversely influence organizational learning and reduce overall performance, organizations must take
appropriate measures to mitigate concerns related
to AI.
The corrosion resistance effect of nanocomposites containing AuNPs coated onto titanium surfaces
(Yildiz Technical University, 2025) Yeni̇yol, Sinem; Mutlu, İlven; Di̇zman, H. Miraç; Arsu, Nergis
The purpose of this work was to evaluate the corrosion of commercially pure titanium (cpTi)
and polymeric AuNPs nanocomposite thin film coatings on cpTi in vitro in artificial saliva
by using different electrochemical tests and surface analysis techniques. Electrochemical impedance spectroscopy (EIS), open circuit potential (OCP) and inductively coupled plasma
mass spectrometry (ICP-MS) were associated with FESEM for surface characterization. OCP
tests revealed higher potential values for AuNPs-Coated surfaces. Increase of the corrosion
resistance for AuNPs-Coated surface was presented by EIS in artificial saliva. Average size
of 20 - 30 nm AuNPs in spherical morphology forming agglomerations were observed on
AuNPs-Coated surfaces. Compared to cpTi surfaces, a lower release tendency of Ti ions from
the AuNPs-Coated Ti surfaces after immersion into artificial saliva was confirmed by ICPMS. Results suggest that AuNPs-Coated Ti surfaces exhibit an enhanced corrosion resistance.
