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
Material circularity and environmental quality in the EU: what causes what and where?
(IOP Publishing Ltd, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND, 2025) Alola, Andrew Adewale; Özkan, Oktay; Uzuner, Gizem
Although the green and blue dividends associated with circular economy have been widely advocated,
whether circular economy necessarily guarantee environmental quality remains unclear. To provide a
more precise insight, in this case for a novel case of all the European Union countries, environmental
effect of the share of used material resources from the reuse of waste materials is examined over the
period 2010–2021. The results reveal that the reuse of waste materials statistically (i)increase CO2
emissions in most quantiles in Austria, Belgium, Denmark, France, Greece, Hungary, Lithuania,
Malta, Netherlands, Poland, and Slovenia, (ii) mitigate CO2 emissions in most quantiles in Bulgaria,
Croatia, Cyprus, Estonia, Finland, Italy, Portugal, Romania, Slovak Republic, Spain, and Ireland, and
(iii) either increasing or reducing CO2 emissions depending on the quantile of material circularity use
rate and CO2 emissions in Czech Republic, Germany, Luxembourg, Sweden, and Latvia. This result
points to a more policy driven approach.
ChatGPT Usage Scale in Education: Validity and Reliability Study
(INT SOC TECHNOLOGY EDUCATION & SCIENCE-ISTES, 19723 LINDENMERE DR, MONUMENT, COLORADO 80132, UNITED STATES, 2025) Taktak, Mustafa; Bafralı, Görsev
This study aimed to develop a valid and reliable scale to measure individuals' and
organizations' attitudes toward the use of ChatGPT, emphasizing the necessity for
organizations to adapt to rapidly evolving information and technology
environments. The methodology consisted of three stages. In the first stage, a 13-
item draft scale was administered to 213 participants, and its construct validity was
evaluated through Exploratory Factor Analysis (EFA). In the second stage, based
on EFA results, the scale was reduced to 12 items and administered to 175
participants, followed by Confirmatory Factor Analysis (CFA) to validate its
structure. In the third stage, test-retest reliability and criterion validity were
examined with 67 school administrators and teachers. The analyses revealed that
the scale consisted of two dimensions, "opportunities" and "challenges," and CFA
confirmed this structure, with fit indices falling within acceptable ranges. The
overall reliability coefficient (Cronbach's Alpha) was calculated as 0.71, and
further analyses, including independent sample t-tests, item-total and item-residual
correlations, inter-factor correlations, and test-retest correlations, supported the
scale’s validity and reliability. Based on the findings, the scale was recommended
to be named the "ChatGPT Usage Scale," offering a valuable tool for assessing
attitudes toward ChatGPT use among individuals and organizations.
Is Ageing Related to Poverty? A Case Study in Turkish Older Population
(SOSYOEKONOMI SOC, ELIF SOKAK, 7-98 ZUBEYDE HANIM MAHALLESI, ISKITLER, ALTINDAG, ANKARA 06070, Turkiye, 2025) Sönmez, Seda; Akdeniz, Şengül; Tufan, İsmail; Özgür, Özlem; Ayan, Fatma Sıla; Faezi, Sanam Asadi
This study seeks answers to whether ageing is related to poverty or not in terms of sociodemographic variability in terms of Türkiye, a developing country. The study is based on 1,512
reference people randomly selected from seven provinces of Türkiye in October 2021-January 2022,
and generalised, hierarchical, and logit log-linear model analyses were examined. It is determined that
the age factor has the most decisive impact on poverty compared to the other variables. The genderbased poverty analysis results show that equality between women and men is close. The income levels
of educated individuals younger than 65 are insufficient to meet living costs.
Thermal and Mechanical Analysis of Wheel Rim in Formula 1 Vehicles
(VINCA INST NUCLEAR SCI, MIHAJLA PETROVICA-ALASA 12-14 VINCA, 11037 BELGRADE. POB 522, BELGRADE 11001, SERBIA, 2025) Kepekçi, Haydar İzzettin; Ağca, Mehmet Erdem; Komatina, Mirko S.
The wheel rim is a metal or alloy component that holds the tire and connects it to
the vehicle. The wheel rims of Formula 1 cars are exposed to thermal stresses during the race and frequent braking at high speeds. In addition to thermal resistance,
wheel rims must possess high mechanical durability. Therefore, material selection
is crucial, along with the designs of the wheel rims. In the production of wheel rims
for Formula 1 vehicles, magnesium, aluminum, and carbon fiber wheel rims are
commonly used. Each of these materials has its advantages and limitations. Optimization processes in Formula 1 technology aim to reduce mass while increasing
mechanical and thermal properties. Therefore, alloys used in wheel rim production
are continuously evolving. In this study, deformation, stress, and temperature values were investigated using the CF) method by exposing Mg AZ80, Al 6061-T6,
and carbon fiber to conditions of 300 °C temperature, 1 MPa pressure, and 300
km/h speed. Turbulence modelling was carried out using the k-ε method in numerical analyses, which utilized a mesh file consisting of approximately 2 million
grids. As a result, the highest deformation in mechanical pressure analyses was
obtained using Mg AZ80 material. In contrast, carbon fiber achieved the lowest
deformation value in the analysis. Regarding thermal results, the lowest temperature value of 282.75 °C was obtained from the wheel rim made of carbon fiber,
whereas with the use of Mg AZ80 material, this value reached up to 292.03 °C.
Considering these values, it was concluded that carbon fiber is the most suitable
wheel rim material for Formula 1 race cars.
Evaluating the Repor aluating the Reporting and Saf ting and Safety Cultur ety Culture of an Airline e of an Airline According to Patankar and Sabin atankar and Sabin's Safety Cultur ety Culture Pyramid
(EMBRY-RIDDLE AERONAUTICAL UNIV, 600 SOUTH CLYDE MORRIS BLVD, DAYTONA BEACH, FLORIDA 32114-3900, 2025) Mumlu Karanfil, Seda
As a result of the literature review, it is seen that the safety management system in airline businesses is mostly evaluated with Reason's just culture model. The fact that there is no research examining Patankar and Sabin's (2010) safety culture pyramid on airline operations, except for a study conducted in the field of ground handling services (Poçar, Işık, & Durmaz, 2022), constitutes the importance and unique value of the research. As stated by Poçar et al. (2022), Patankar and Sabin's (2010) safety culture pyramid is not sufficiently included in practice, and this model is important in terms of drawing attention to the impact of employees' safe behaviors on safety culture. In this direction, the SMS instructions, reporting policies and SMS reports of the airline subject to the research were obtained as documents and analyzed. As another stage of the research, it was aimed to evaluate the SMS reports of the airline according to Patankar and Sabin's safety culture pyramid. With this evaluation, content analysis was conducted to determine the step of the airline in the safety pyramid.
Unlike previous studies, this study is thought to contribute to the literature by explaining the relationship between reporting culture, safety culture and safety management system and evaluating the reporting in the organization according to Patankar and Sabin's safety culture pyramid.
