Editorial & Advisory Board - Acta Technica Corviniensis

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ACTA TECHNICA CORVINIENSIS – Bulletin of Engineering 5. Bisera KAJMAKOSKA, Franco LOMBARDI, Paolo CHIABERT – ITALY Zoran ANISIC – SERBIA Valentina GECEVSKA – MACEDONIA CONTINUOUS INNOVATIVENESS SUPPORTED BY INTEGRATED COMPUTER‐BASED AND PLM SOLUTIONS 41 ABSTRACT: Motivating product designers and research groups to think “outside the box” is of special interest for companies and research centres willing to remain competitive even in times of crisis. It is proven that those leaders which realized that the continuous innovativeness is a result of in‐crossed creativity support and sustained quality are more prepared for changes and bring their companies to success. Innovation management has significantly changed towards approaches that support innovation process especially the early phases in which creativity is more than needed. Approaches towards Product Lifecycle Management are changed also. In the advent of Web.2.0 these approaches have become increasingly computer‐based enabling access to large user communities evolving into open or semi‐open Enterprise 2.0 platforms. The parallel development of tools that could support innovative (creative) thinking based on off‐line so‐called Classical methods and IT solutions which claim to be collaborative and support idea generation brings to doubts about the choice of most suitable solutions. On the other side, companies are more eager to use solutions which can follow the different business processes including product lifecycle and that can aid their innovative capacity by being closer to customers. In this research an integrated solution is suggested that includes ideation and collaborative tools cross‐used with PLM solutions which could support continuous innovativeness. Existing concepts and approaches on computer‐based solutions for innovation and PLM are presented, with a focus on the “creative” phases such as product design that elevates the success of the products. The overview is made with a scope to underline the necessity of integration of the pragmatic aspects of creativity into solutions having features recognized with literature and test analysis that could support mainly creative thinking and knowledge sharing in companies. 6. Simion JITIAN – ROMANIA THE USE OF IR‐RA SPECTROSCOPY TO STUDY THE THERMAL DEGRADATION OF POLYVINYL ACETATE FILMS 47 ABSTRACT: To determine the optical constants of polymer films can be used both external specular reflection spectra and internal reflection spectra. The transmittance values measured in IR reflection‐absorption (RA) spectra can be used to determine the optical constants of dielectric films laid on solid substrates. To obtain the optical constants of polymers films laid on steel we used dispersion analysis. In this case, the optical constants are obtained from IR spectrum recorded at a single incidence angle. Using dispersion analysis offers the advantage of processing a large volume of data. The IR spectra of PVAc film deposited on steel recorded after its heat treatment, shows the appearance of a thermal degradation process of polymer. 7. Abdoullah NAMDAR – IRAN ENHANCEMENT SLOPE DESIGN USING MINERALOGY TREATMENT 51 ABSTRACT: To increase safety of any structure and improve of soil foundation, experiments in laboratory and in situ applications along with computer modeling could lead to find economical constructed slope, and also it is standard method of starting construction activities for better understanding of material characteristics in the body of earth structure. The application of mixed soil by natural local material in slope construction is a novel technique. It is possibility of development new materials to satisfy slope safety requirements, in this regard mineralogy of different natural soils have been considered, and affect of mixed soil matrices in the identified slope behavior analyzed. The result of investigation revealed this method is fast, economic, trustable and easiest way of slope construction and it is due to understanding of soil mineralogy in geotechnical engineering, and the factor of safety has direct correlation with soil angle of friction and cohesive as well as unit weight. 8. Mohamed A. A. EL‐SHAER – EGYPT EFFECT OF EARTHQUAKE OF STEEL FRAMES WITH PARTIAL RIGID CONNECTION 57 ABSTRACT: The present study is aiming to evaluate the seismic performance of moment resisting steel frames with partial rigid connections considering elasto‐plastic behavior of girder to column connection under the effect of earthquake loadings. The frame performance prediction and evaluation procedure is mainly based on the nonlinear dynamic analysis considering both geometrical and material nonlinearities. The current paper investigates the effects produced by some earthquake records on steel moment resisting frames considering both SDOF (SINGLE DEGREE OF FRADOM) system and MDOF (MULTI DEGREE OF FRADOM) system. Statistical analyses are performed to characterize the response of such frames by obtaining comparable results that allow the determination of the behavior factor for each frame (Q‐ factor) which expresses the degree of damage for each frame. The results summarized in terms of base shear‐top displacement relationships considering different earthquake records and at P.G.A. (Peak Ground Acceleration) level 0.35G (0.35 from ground acceleration levels). Finally the values of the Q‐factor for each frame and the comparison of such values with respect to the current seismic provisions were outlined. 9. Michal SPORKA, Tatiana CZÁNOVÁ – SLOVAKIA NEW KNOWLEDGES AT MACHINING OF IMPROVING HIGHSTRENGTH GRAPHITE CAST IRON BY DRILLING 61 ABSTRACT: High fortification of the machined surface of ADI (Austempered Ductile Iron) cast iron can significantly affect its functional properties. This article deals with problems of selected ADI samples, their production and use. On the basis of experimental tests has been identified its machinability, the cutting process during drilling, and also mutual comparison of nodular and grey cast iron, which will further intensify and extend current knowledge of this problems. The relatively new construct material ADI alloy (ADI – Austempered ductile iron) have a special properties It is a bainite cast iron which we have from heat treatment (isothermal improving) of graphite cast iron with spherical graphite (nodular cast iron). ADI cast iron offers combination of simple properties like steel have. If conditions are fulfilling the ADI cast iron seems like steel for improving for example 42 CrMo4 (15 142), with its properties. 16 2012. Fascicule 2 [April–June]
ACTA TECHNICA CORVINIENSIS – Bulletin of Engineering 10. Giovanni BELINGARDI, Jovan OBRADOVIC – ITALY IMPLEMENTATION OF ADVANCED COMMUNICATION SYSTEMS AND DISTANCE LEARNING CONCEPT AT POLITECNICO DI TORINO WITHIN THE UNIVERSITY EDUCATION PERSPECTIVE 65 ABSTRACT: New dimension and possibilities for teaching and education in all fields are offered by the use of information and communication technologies (ICT) and e‐learning systems. The introduction of these systems will improve, supplement and aid traditional teaching methods and will also enable the beginning of different teaching and learning processes that are less limited in space and time. This offers also new insight into subjects that are not possible with traditional methods. The Centre for e‐learning activities and the multimedia production and testing (CELMI) at Politecnico di Torino, aims to be the institutional reference for the coordination of support activities in the area of technology and multimedia training. The Centre puts the particular emphasis on skills in e‐learning and open and distance learning and on the activities related to the release and testing of multimedia technologies. This paper is presenting the use of high technology communication systems at Politecnico di Torino, implemented with the purpose of improved university education. Also, the multidisciplinary working systems, communication models, multimedia and video production, videoconferencing systems and special services for disabled, are briefly described. 11. Angel ZUMBILEV – BULGARIA GLOW DISCHARGE OPTICAL EMISSION SPECTROSCOPY OF CARBONITRIDED LAYERS 69 ABSTRACT: The glow discharge optical emission spectroscopy (GDOES) is usually used for defining surface coatings, hidden connections, and deep profiles. It combines pulverization and atomic emissions in order to enable an extremely fast and sensitive analysis. The technique suggests quick, reliable and economically effective decisions. The aim of the present work is to investigate the possibility of applying glow discharge optical emission spectroscopy while building the profile of nitrogen and carbon distribution in carbonitrided layers. 25CrMnSiNiMo steel and Armco‐iron have been carbonitrided in low‐temperature plasma in ammonia and corgon medium. The results show that increased amount of carbon is observed both in the combined zone and in the diffusion zone of the carbonitrided layer. It has been established that after carbonitriding of 25CrMnSiNiMo steel and Armco‐iron at t=550 0 C, P NH3 = 280 Pa, P 82% Ar + 18% CO2 = 120 Pa, τ = 4 h, the most gradual change of the distribution of nitrogen and carbon is achieved in the carbonitrided zone of the layer. 12. Nuruddeen USMAN – NIGERIA Ilias SAID, Ahmad Zakiiulfuad YAHAYA – MALAYSIA INDOLENT DISPOSITION TOWARDS ICT ACCEPTANCE AMONG PRACTISING QUANTITY SURVEYORS IN NIGERIA 75 ABSTRACT: Information and Communication Technology infrastructure provides a wide platform for exchanging data, coordinating activities, sharing information, and supporting globalization of businesses, all based on powerful computing and networking technology. However, quantity surveying firms appears to make sluggish progress towards effective Information and Communication Technology implementation for its unique features which distinguish it from other industries, it remain weak and data cannot be exchange efficiently, especially in the developing countries like Nigeria. The objective of this paper is to conceptually synthesize the attitude towards ICT acceptance for construction cost management. Therefore, this study reviews the causes and impact of sluggishness in the usage of information and communication devices for a sustainable construction cost management. It found that human and organizational culture is among the major cause of the slow acceptance of the Information and Communication Technology devices for construction cost management, whereby, it affects the selection and usage of the devices. 13. Ala’a M. DARWISH – IRAQ DOUBLING THE WATER QUANTITIES IN IRAQI MARSHES BY CHANGING ITS TOPOGRAPHY – 81 ENGINEERING SOLUTION FOR A POLITICAL, SOCIAL AND ENVIRONMENTAL DEBATE ABSTRACT: The Garden of Adan, which is now known as the Iraqi marshes, is suffering from the lack of water. In the nineties of the twentieth century it was desiccated for political reasons. In the timeframe between 2003 and present date, efforts of re‐flooding it to its original area of 20,000 square kilometers were jammed to restore only one third of this area with a poor quality of water. Global climate change and water developing projects in the surrounding countries, Turkey, Syria and Iran had severely violated Iraqi water shares required to supply this area. The environmental destruction in this wetland is not only reflected upon the vanishing of its wildlife but extended to force its inhabitants to flee. In addition to highlighting this Iraqi catastrophe, the aim of this research is an attempt to save a considerable amount of fresh water by the use of the physical phenomena concerning the evaporated water quantity with respect to the surface area. Tests have been done for models of soil totally/ partially covered with water to figure out the amount of water that can be saved by the retardation of the evaporation process. The reduction of the amount of evaporated water with respect to its surface area showed that 50% of water can be saved, if the top surface area of water was reduced to 30% of its original area. Changing the marshes topography by deepening 30% of its area and filling, with the same excavated soil, the remaining 70% might restore it to its original size and environment. 14. Michaela MRÁZOVÁ, Jozef PILC – SLOVAKIA RESEARCH OF TITANIUM MATERIALS USED IN MEDICINE 85 ABSTRACT: The material for dental implants is required to be biocompatible, mustn’t be toxic and also shouldn’t cause allergic reactions. It must have high ultimate strength Rm and yield point Rp with desirable low density and low modulus of elasticity E. A problem in the course of the development of metallic biomaterials represents not only their actual or potential toxicity but also their allergenetic potential. Metallic materials, for example, stainless steel, titanium and its alloys, and tantalum are widely used for medical implants in trauma surgery, orthopaedic and oral medicine. Nowadays, at oral medicine used to use titanium implants for their nonallergenetic and good mechanical properties. This work deals with identification and intensification of cutting conditions at machining these materials and defines their machinability based on cutting forces and chip shape. Commercially pure titanium is a hardmachining material and need to be searching long time to get satisfactory results. 2012. Fascicule 2 [April–June] 17
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