Ayfer Veziroğlu

A System Dynamics Model For The Reduction Of Health Expenditures Through Transition To Hydrogen Vehicles (Srth): Case Studies In the Usa, China, And India

In this study, system dynamics (SD) modeling is used as a tool to evaluate the transition to hydrogen within the transportation sector and its effect in reducing of health expenditures. SD modeling is a useful tool for researchers when the system they are studying is large, complex, containing interdependent variables. In order to understand why SD modeling is necessary to study the transition toward hydrogen energy for transport, we must first discuss the significance of ambivalence and the meaning of transition. Then, we can apply the transition framework to understand the problems in the transportation sector. This will justify the use of SD to explore the central problem of transportation sector transition to hydrogen energy and its benefits. This paper provides a short background on SD, explains its application to hydrogen powered transportation, and health benefits for USA, China and India.

Solubility of Fullerenes in Naftalan

From ancient times naftalan is used to treat various diseases both of animals and of humans. The positive use of fullerenes in medicine, pharmacology and perfumery makes them an attractive and promising object of extensive research. The combination of fullerenes and naftalan oil together in one compound, affecting positively on the vital functions of the human body, can bring the unexpected results. The solubility of fullerenes in naftalan oil may be the key moment in the synthesis of products of such kind. A detailed study focused on the elucidation of the fullerenes solubility in naftalans has been presented in this chapter: (1) determination of the solubility of fullerite in naftalan; (2) definition of the regions of naftalan transmission in toluene; (3) measurement of fullerenes solutions spectra in naftalan; and (4) comparison of the measured spectra of fullerene solutions in naftalan and toluene.

Polyether Urethane Nanocomposition as a Multi-functional Nanostructured Polymeric Coating for the Future

Modern science and technology level requires availability of polymeric insulating materials which would have not only high strength, but also the features like adhesion, tensile, impact and erosion resistance. The elaboration of the technology of production of new erosion resistant coating as new generation of materials with high hydrophobic properties is the achieved goal of the presented investigations. This problem has been solved by the development of new primary polyester on the basis of which the polyether urethane composite material containing ferromagnetic nanoparticles has been produced. The synthesis of ferromagnetic superparamagnetic nanoparticles fixed in polymeric matrix of ferromagnetic polymeric nanocomposite has been carried out in special reactor where composition of the polymeric nanocomposite has been controlled.

The Prospects for Use of Hydrogen Accumulators on the Basis of Lanthan-Magnesium-Nickel Store Alloys

A theoretical study of hydrogen solubility in alloys with structures of the L22, D2d, L60 types and in phase mixtures of these alloys has been developed on the basis of the molecular-kinetic concept. The absorption and desorption isotherms have been investigated, their dependence on the hydrogen activity and the magnesium concentration has been found. It is presented that horizontal plateau appears and is lengthened in the isotherms with increasing concentration of magnesium and with decreasing activity of hydrogen atoms. Considering volume effects, the hysteresis phenomena have been studied and hysteresis constants have been evaluated. A fall in hysteresis constant with reduced activity of hydrogen atoms has been shown. Our calculation results are in agreement with experimental data.