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Seung Kyu Lee, Truong An Dang and Van Tuan Le

Bejestan M.S. (2012): Shear stress distribution in sharp 90-degree bend with a W-weir . Ecology. – Environment and Conservation, pp.409-414. [18] Barbhuiya A.K and Talukdar S. (2010): Scour and three-dimensional turbulent flow fields measured by ADV at a 90-degree horizontal forced bend in a rectangular channel . – Flow Measurement and Instrumentation, vol.21, No.3, pp.312-321. [19] Begin Z.E.B. (1986): Curvature ratio and rate of river bend migration-update . – Journal of Hydraulic Engineering, vol.112, No.10, pp.904-908. [20] Bhuiyan F., Hey R

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A. Alsabry

Abstract

The article presents a description of ion migration in a concrete pore liquid caused by an external electric field. The equation of the flow of aggressive chloride ions is formulated on the basis of partial equations of mass balance. It is assumed that electrochemical potential is in classical form, then an attempt is made to determine the average diffusion coefficient using the inverse diffusion Eq.(3.9).

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Darja Neverkovica and Aleksandrs Korjakins

,” University of Hawaii College of Engineering, Department of Civil and Environmental Engineering, Rep. no. UHM/CEE/06-08, 2006, pp. 152. [10] NORDTEST, “Concrete, Repairing Materials and Protective Coating Carbonation Resistance,” Finland Test method NT BUILD 357, Sep. 1989. [11] NORDTEST, “Concrete, Mortar and Cement-Based Repair Materials: Chloride Migration Coefficient from Non-Steady-State Migration Experiments,” Finland Test method NT BUILD 492, Nov. 1999. [12] EN 12390-3:2002: Testing Hardened Concrete - Part 3

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Tibor Farkas and Erika Hronyecz

Abstract

Nowadays, international and national events clearly point out the need for cooperation between different defense organizations in crisis and emergency situations (disaster events, migration issues, and other emergencies) for successful tasks. The fundamental basis of this cooperation is always the command and control activity supported by modern technical equipment that ensures the coordinated implementation of tasks. The key, human element of info-communication support is the preparation and training of the successful professionals. In this paper, the authors intend to present the importance of vocational training.

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Tamás Kardos and Dénes Nimród Kutasi

Abstract

An HVAC system contains heating, ventilation and air conditioning equipment used in office or industrial buildings. The goal of this research is to design a controller for the process of cooling an office building that is made up of three rooms. The desired room temperature can be achieved by controlling the fans making up the fan coil units and the cooling medium’s temperature. By these means the building connected to the electrical grid becomes a smart office. The used building model includes several dynamically changing interior and exterior heat sources affecting the inner climate, which introduces a level of uncertain prediction into the system. We have determined the controller’s performance by the rate of deviation from the expected temperature, the consumed electrical energy and the generated noise. The controller was created in Matlab Simulink with the possibility of migration to a Siemens PLC.