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 yayınların etkisini artırmak için telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Öğe Türü: Öğe , Advanced Mathematical Analysis of Ebola Virus Transmission Through Fractal Fractional-Order Models(World Scientific, 2026) Irshad, Ateeq Ur Rehman; Khan, Nadeem; Khan, Mukhtiar; Hussain, Farhad; Shah, Kamal; Abdalla, Bahaaeldin; Ansar, Khursheed J.; Abdeljawad, ThabetThis study presents an advanced mathematical framework for analyzing the intricate dynamics of Ebola virus transmission, utilizing a fractal–fractional order model to encapsulate the complex geometric characteristics of the underlying dynamical system. The existence and uniqueness of solutions are established through a rigorous fixed-point theorem approach, while Ulam– Hyers stability is meticulously investigated. Fundamental epidemiological insights are derived, including the establishment of non-negative solutions, computation of the basic reproduction number, sensitivity analysis, and identification of equilibrium points. To corroborate the theoretical results, numerical simulations are performed using the Adams–Bashforth approximation method, alongside the development of an interpolation-based numerical scheme to enhance computational efficiency. The findings are illustrated through comprehensive graphical representations, highlighting the robustness and applicability of the proposed model in elucidating and predicting the transmission dynamics of the Ebola virus.Öğe Türü: Öğe , Solving Time Fractional Diffusion-Wave Equation Using Hyperbolic Polynomial B-Splines: A Uniform Grid Approach(Ain Shams University, 2026) Kiran, Aleeza; Yaseen, Muhammad; Khan, Aziz; Abdeljawad, Thabet; Alqudah, Manar A.; Thinakaran, RajermaniIn this study, we present an efficient numerical scheme based on uniform hyperbolic polynomial B-splines for solving the time-fractional diffusion-wave equation involving the Caputo derivative. This equation models various physical phenomena including anomalous diffusion and complex dynamical behavior. The proposed method ensures a smooth and continuous approximation that effectively captures both local and global features of the solution such as sharp gradients and long-range memory effects. The key advantage of uniform hyperbolic polynomial B-splines lies in their flexibility and high accuracy across the computational domain. Stability and convergence analyses are carried out to confirm the method’s robustness and error control. Finally, numerical results are compared with those reported in existing literature to demonstrate the accuracy and reliability of the scheme as process innovation.Öğe Türü: Öğe , The Dynamics of Prey–Predator Model With Global Warming on Carrying Capacity and Wind Flow on Predation(Walter de Gruyter GmbH, 2026) Thirthar, Ashraf Adnan; Sharba, Bashar Ahmed; Majeed, Salam Jasim; Panja, Prabir; Abdeljawad, ThabetThis work presents the development of a twospecies prey and predator model in the context of global warming. Studies indicate prey’s growth rate and predator anxiety are inversely correlated. Furthermore, evidence supports as global warming increases, prey’s carrying capacity may decline. Predators are thought to be able to work together to pursue prey. Furthermore, current thinking holds that the direction of the wind may affect how much prey the predator consumes. Scholars propose that when global warming increases, predator growth rates may decline. Additionally, experts argue that the intraspecies competition among predators, which is reliant on the density of the current prey, may result in a decline in the number of predators. It is widely accepted that the rate of global warming is constant. Furthermore, the prevailing view is that both predator and prey species may be involved in the rise in global warming. It is commonly understood that several industrial and ecological measures could reduce global warming. The model’s solution’s positivity and boundedness have been examined. Various equilibrium points are assessed, and the system’s stability is examined around these places. The Hopf bifurcation around the positive equilibrium point is investigated. Via numerical simulation and testing on a virtual data set, all theoretical results are experimentally validated.Öğe Türü: Öğe , Variability in Back Squat Repetitions Performed Before Exceeding Different Velocity Loss Thresholds(University of Zagreb - Faculty of Kinesiology, 2026) Li, Zhaoqian; Zhang, Xing; Şentürk, Deniz; Akyıldız, Zeki; Janicijevic, Danica; García-Ramos, AmadorThis study aimed to evaluate the intra-individual between-day variability in the number of repetitions performed before exceeding 10%, 20%, and 30% velocity loss thresholds (VLTs) during the back squat exercise. Thirty resistance-trained male wrestlers performed sets of repetitions to failure at 70% and 80% of their 1-repetition maximum (1RM) on two separate days. Velocity loss was calculated using as the reference either the first repetition of the set or the fastest repetition. The set termination criterion specified stopping the set after one or two consecutive repetitions exceeded the prescribed VLT. Variability in repetitions was expressed as the coefficient of variation (CV), calculated as the absolute difference between sessions divided by the average repetitions across sessions. All factors, including load (70%1RM vs. 80%1RM), reference repetition (first repetition vs. fastest repetition), and set termination criterion (one vs. two repetitions exceeding the VLT), significantly affected the number of repetitions performed for the 10%, 20%, and a 30% VLT conditions (p<.01). Regardless of these factors, intra-individual variability in the number of repetitions performed between sessions was consistently high (CV > 10%). These findings highlight two key challenges when using VLTs in training prescription. First, specifying a VLT alone is insufficient, as the actual number of repetitions performed—which ultimately dictates adaptations—is influenced by multiple methodological factors. Second, even when methodological factors are standardized, the inherent variability in the number of repetitions performed across sessions remains high, which could impact acute fatigue responses and longterm training adaptations.Öğe Türü: Öğe , Airline Strategy Research: A Bibliometric and Thematic Analysis (1980–2025)(Elsevier B.V., 2026) Kaya, Mustafa; Bayar, Tuba; de Oliveira, Renan Peres; Lohmann, Gui; Şengür, Ferhan KuyucakResearch on strategic management in airlines has rapidly expanded since its inception in the 1980s, with studies providing valuable insights into topics such as alliances, competitiveness, sustainability, and digitalisation. To contribute to this effort, the present study presents an integrative bibliometric analysis of 306 documents indexed in either the Web of Science or Scopus (1980–2025). Using Bibliometrix (R), a performance analysis indicated that although this research topic shows steady growth, its citation impact is concentrated among a limited number of authors, institutions, and specialist journals. Competitive advantage, service quality, alliances, lowcost airlines, financial performance, business strategy, revenue management, and pricing strategy were identified as regularly studied themes with strong interconnections and depth within their respective topics. COVID-19 and sustainability were among the trending topics, but despite their importance, emerging topics such as air cargo, digital transformation, and decision support analytics have not yet been significantly targeted in this literature strand. Based on these insights, we provide a conceptual framework to understand strategic priorities in the airline sector and to identify future research opportunities.
