Applied Engineering Letters

Number 3, 2018

85-89
CREATING AND ENCRYPTING E-COMMERCE DATABASE FOR SELLING MECHANICAL ELEMENTS

Authors: Dj. Dihovični, V. Krunić

Abstract

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In this paper it is presented creation and encryption of e-commerce database for selling mechanical elements. It is shown a procedure of creation a database and tables with appropriate data, which is the first step in developing stable e-commerce application. For security reason it is necessary to encrypt the database, and it is described a complete process, and as well it is given part of the code of web application for inserting data into the tables, deleting some data and updating them. In developing ecommerce application for selling mechanical parts, it is applied C# programming language by using ASP.NET, with using HTML language and XML.

90-97
THE POTENTIALS OF SOLAR ENERGY IN THE REPUBLIC OF SERBIA: CURRENT SITUATION, POSSIBILITIES AND BARRIERS

Authors: A. Ašonja, V. Vuković

Abstract

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Number of views: 345

Although the potential of solar energy in the Republic of Serbia is up to 30% higher than in the countries of the European Union that lead to the implementation of these technologies, the Republic of Serbia is ranked among the countries with the lowest production in the region with the production of 10 MV solar PV capacities. The aim of the paper was to present the current balanced capacities, related to solar PV energy, in the Republic of Serbia and countries in the region. In order to present better the material and conclude why the results in the Republic of Serbia are not better, in the paper are analyzes the possibilities for installing such capacities as well as the barriers that need to be eliminated.

98-104
IMPACT TOUGHNESS OF HIGH-STRENGTH LOW-ALLOY STEEL WELDED JOINTS

Authors: A. Ilić, L. Ivanović, B. Stojanović, D. Josifović, E. Desnica

Abstract

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Number of views: 434

Impact toughness of samples with three different relative positions of V-notch and multipass V- butt welded joint at high-strength low-alloy steel S690 are considered in this paper. The aim of this paper is to analyze the influence of material degradation due to welding to impact toughness of samples made of considered steel. Impact toughness was analyzed by experimental approach objected to including as many influential factors as it is possible. The main objective of impact toughness testing is to evaluate the influence of welding to overall load capacity and stability of welded mechanical construction made of high-strength low-alloy steels. Fully understanding of transformation processes provoked by welding of high-strength low-alloy steels and impact toughness testing as resulting property of those processes are crucial to perform integrity, safety and reliability analysis. This paper pointed out the necessity of analyzing the welded constructions on different dimension levels. Further investigations in this area have to be a continued through more quantitative analysis of welded joints which will, established precise analytical model of zones of welded joints, and furthermore, in involvement with adequate software, a complete evaluation of the experimentally obtained results. As experimentally obtained results of impact toughness that correlate to microstructure and microhardness distribution implicated that development of those steels must be followed with improving weld processes and development, adjusting and modification of the design.

105-113
ALTERNATIVE DRIVE SYSTEMS AND ENVIRONMENTALY FRIENDLY PUBLIC PASSENGERS TRANSPORT

Authors: S. Milojević, T. Skrucany, H. Milošević, D. Stanojević, M. Pantić, B. Stojanović

Abstract

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City transport causes the biggest part of road transport emissions. Besides, by engaging mainly fossil fuels in the city transport, we are responsible for air pollution in urban areas. On the other hand, passengers transport (private and public, individual and mass) may contribute substantially to reduce the negative impact on the environment by application of alternative fuels and declining of the use of fossil fuels. The main alternative fuels for drive systems in transport are the following: electricity, hydrogen, and biofuels. Synthetic fuels are option as a technology. Some of them are very effective but too expensive technologies. Another way is introduction of flexible transport (from door to door, on demand, etc.) which application enables to decrease the number of cars in urban centers to avoid congestions and the negative impact on the environment. This paper points out that public transport has a special role in the process of decreasing fossil fuel dependence, and the necessity for rapid alternative technology implementation, as well as development of the public transport system itself. Proposed is the introduction of public passenger transport from door to door that offers a comfort comparable to personal cars (specifically for handicapped persons) and helps to lowering congestions on the roads.