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Article Citation - WoS: 13Skeletonization-based beam finite element models for stochastic bicontinuous materials: Application to simulations of nanoporous gold(Cambridge Univ Press, 2018) Soyarslan, Celal; Argeso, Hakan; Borgmann, SwantjeAn efficient representative volume element generation strategy is developed in modeling nanoporous materials. It uses periodic 3D beam finite element (FE) models derived from skeletonization of spinodal-like stochastic microstructures produced by a leveled random field. To mimic stiffening with agglomeration of the mass at junctions, an increased Young's modulus is assigned to the elements within the junction zone. The effective Young's modulus, Poisson's ratio, and universal anisotropy index are computed. A good agreement of the Young's modulus predictions with those obtained from experimental results for phase volume fractions 0.20 < phi(B) < 0.50 is observed. Moreover, the elastic anisotropy index of the generated beam networks shows sufficient proximity to isotropy. Finally, it is demonstrated that, as compared to the simulation statistics of voxel-FE models, for the beam-FE models over 500-fold computational acceleration with 250-fold less memory requirement is provided.Article A boundary value problem for second-order nonlinear difference equations on the integers(Cambridge Univ Press, 2005) Dal, F; Guseinov, GSIn this study, we are concerned with a boundary value problem (BVP) for nonlinear difference equations on the set of all integers Z, under the assumption that the left-hand side is a second-order linear difference expression which belongs to the so-called Weyl-Hamburger limit-circle case. The BVP is considered in the Hilbert space l(2) and includes boundary conditions at infinity. Existence and uniqueness results for solution of the considered BVP are established.Article Citation - WoS: 2Citation - Scopus: 2A Note on Public Investment, Public Debt, and Macroeconomic Performance(Cambridge Univ Press, 2011) Ismihan, Mustafa; Ozkan, F. GulcinThis paper provides an assessment of public capital spending within a macroeconomic policy model with explicit monetary and fiscal interactions, in contrast to most of the existing analyses of public investment that utilize "real" general equilibrium models. As such, we are able to consider the interactions of public investment with inflation, taxation, and public debt. Our results indicate that a clear trade-off exists between the costs and benefits of public investment, as is the case in the existing literature. However, the use of a monetary-fiscal policy model rather than a "real" general equilibrium one enables us to trace the macroeconomic channels including monetary ones through which these costs and benefits are transmitted to the rest of the economy. To the extent that these costs and benefits vary between countries, our results provide a potential explanation for the mixed empirical findings on the real effects of public capital spending.Article Citation - WoS: 3Citation - Scopus: 3NEW ALGEBRAIC-TRIGONOMETRIC INEQUALITIES OF LAUB-ILANI TYPE(Cambridge Univ Press, 2017) Ozban, Ahmet YasarThe Laub-Ilani inequality ['A subtle inequality', Amer. Math. Monthly 97 (1990), 65-67] states that x(x) + y(y) >= x(y) + y(x) for nonnegative real numbers x, y. We introduce and prove new trigonometric and algebraic-trigonometric inequalities of Laub-Ilani type and propose some conjectural algebraictrigonometric inequalities of similar forms.Article Citation - WoS: 1Citation - Scopus: 2Determination of Disaster Response Self-Efficacy and Related Factors of Nurses Working in Surgical Clinics(Cambridge Univ Press, 2025) Kulekci, Emel; Tamer, Fazilet; Tug, OzgurObjectives Disasters experienced in the world and in our country in recent years have made it necessary for health professionals to have high levels of disaster response self-efficacy. Nurses, as an important member of the health care team, have a key role in disaster management, especially in disaster response. Therefore, it is extremely important for nurses to be ready for disaster response and to have high levels of self-efficacy in disaster response. This study was conducted to determine the disaster response self-efficacy status and related factors of nurses working in surgical clinics.Methods This descriptive cross-sectional study was conducted with 127 nurses working in surgical clinics between June and August 2023. "Sociodemographic Data Collection Form" was used to determine the sociodemographic characteristics of the nurses and "Of the Disaster Response Self-efficacy Scale" was used to assess their disaster response self-efficacy.Results The findings of the study show that nurses working in surgical clinics have a high level of disaster preparedness. Previous on-duty disaster experience and feeling competent about disaster are positively associated with disaster response self-efficacy.Conclusions It may be recommended to provide evidence-based, high-quality, and up-to-date training programs at regular intervals to increase and maintain the emergency response competencies of nurses. The originality of this study is that it was conducted only with surgical nurses.Article Citation - WoS: 12Citation - Scopus: 13A NEW SHOCK MODEL WITH A CHANGE IN SHOCK SIZE DISTRIBUTION(Cambridge Univ Press, 2021) Eryilmaz, Serkan; Kan, CihangirFor a system that is subject to shocks, it is assumed that the distribution of the magnitudes of shocks changes after the first shock of size at least d(1), and the system fails upon the occurrence of the first shock above a critical level d(2) (> d(1)). In this paper, the distribution of the lifetime of such a system is studied when the times between successive shocks follow matrix-exponential distribution. In particular, it is shown that the system's lifetime has matrix-exponential distribution when the intershock times follow Erlang distribution. The model is extended to the case when the system fails upon the occurrence of l consecutive critical shocks.Article Citation - WoS: 3Citation - Scopus: 2Cross-Sectional Determinants of Lactose-Free Food Awareness and Purchase Among Adult Consumers(Cambridge Univ Press, 2023) Yilmaz, Birsen; Agaguenduez, Duygu; Kalyoncu Atasoy, Z. Begum; Yesilyurt, Neslihan; Ergin, Sule; Murat, NaciThis research was conducted to evaluate the knowledge and purchasing behaviour of consumers regarding lactose-free foods. Study data were collected from 1882 individuals with the help of a questionnaire form. Attitudes towards animal welfare, healthy nutrition and gastrointestinal symptoms were also evaluated. The majority (86.6%) of the participants reported that they had heard of the concept of lactose-free foods before, but more than half (67.0%) did not report buying them because of their higher costs compared to regular products and lack of sufficient information. Not causing gas/bloating (32.5%) and being healthier (28.3%) were shown to be the most significant motivational factors in purchasing lactose-free foods (P < 0.05). The factors affecting purchase of lactose-free products were education, employment status, history of having a food intolerance test and animal welfare perception together with higher scores from the gastrointestinal symptom rating scale, and attitude scale for healthy nutrition (P < 0.05). Body mass index was not found to be an effective factor determining purchase intention. The results provide a general overview of consumers, however, further studies on other demographic groups are needed.
