Applied Mechanics and Materials Vol. 792

Abstract: The article presents the results of experimental studies of technology of plasma-pulse impacts on the surface properties of the productive formations. Upcoming trend of research to increase overhaul period of engine driven wells is proposed. Prospect and feasibility of further research on the development of innovative technological solutions of rational and cost-effective development of the fields with hard to recover reserves are noticed.

Abstract: In present work a new setup for in situ studies of molecular self-assembling process for fabrication of ion-conducting membranes for “green” fuel cells was developed. Due to compactness, this unique setup can be used on the synchrotron beamlines. The GISAXS and optical microscopy data have shown the effectiveness of the control of molecular architecture by impact of high temperature, UV-irradiation and solvent vapors.

Abstract: The pressure drag of the vehicle has a significant impact on its energy consumption. The aerodynamic drag has become a prevalent among the other components of the motion resistance forces with the speed increasing above a certain value. Therefore, it is necessary to refine the value vehicles’ aerodynamic drag in a real-city-traffic condition.

Abstract: In this paper an inverse heat conduction problem for estimating the constant value of power of internal heat source during induction heating of paramagnetic material is developed. The experimentally measured temperature data are used as the input for the inverse heat transfer model. The problem is formulated as a problem of optimal control over an object with distributed parameters, the internal heat power is considered as the control action. The problem is reduced to a problem of mathematical programming; the special optimisation method based on the alternance properties of the sought optimum solutions is applied to estimate the internal heat power.

Abstract: The structural evolution of the components for the active layers of all-polymer solar cells was studied by DSC, X-ray diffraction and optical microscopy. It was found that polymer donor (PTQ1) and polymer acceptor (PNDIT2) form lamellar structures with layers oriented parallel and perpendicular to the substrate, respectively. All films reveal π-π stacking in the direction normal to the film. During thermal annealing the structure improvement occurs only for the donor component. In a PTQ1/ PNDIT2 blend, two components form individual lamellar phases with the texture similar to that of the pure polymers. Upon annealing, the structure of PNDIT2 was found to be disturbed whereas the structure of PTQ1 phase improves. The micro-phase separation occurring during annealing of the PTQ1/ PNDIT2 blend is accompanied by the formation of large spherulitic objects.

Abstract: Coins are widely studied in archaeometry because they provide a lot of information on social, economic and technological history of people and territories which they are related to. A lot of chemical analyses have been performed by different methods, but only a few of metallographic data are known. The combination of chemical analysis with metallurgical investigation results in a complete description of the coin and its production steps. This paper reports a summary of the results on the Cu base coinage in Italy (Roman and Byzantine Empires) with the aim to develop a protocol of investigation based on microstructural and chemical analysis in order to reinforce the numismatic classification.