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Probrano po
3.632 (21-30)
NaslovWages and incentive instruments for enhancing the performance of construction industry employees / Alena Tichá, Dana Linkeschová, Zdeněk Tichý, Zuzana Mrňová.
Materijalni opisGraf. prikazi.
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Vrstačlanak
OpisThe aim of the article is to present quantitative development of wages and incentive instruments in the Czech Republic during the recent period and at the same time to provide an insight into the emerging changes in the labor market brought by the industry and the construction industry digitization. Strong demand for increased corporate social responsibility of the companies in the technical, economic and environmental protection and care sectors, and in particular in mutual communication between market partners, has had and will have an impact on wage policy and creation of employer wage systems. This article briefly gives the insight into what visions and strategies this situation brings into the construction industry field.
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21
NaslovComparison of power distribution, losses and efficiencies of a steam turbine with and without extractions / Vedran Mrzljak, Sandi Baressi Šegota, Hrvoje Meštrić, Zlatan Car.
Materijalni opisGraf. prikazi.
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OpisThe paper presents an analysis of two steam turbine operation regimes - regime with all steam extractions opened (base process) and regime with all steam extractions closed. Closing of all steam extractions significantly increases turbine real developed power for 5215.88 kW and increases turbine energy and exergy losses with simultaneous decrease of turbine energy and exergy efficiencies for more than 2%. First extracted steam mass flow rate has a dominant influence on turbine power losses (in comparison to turbine maximum power when all of steam extractions are closed). Cumulative power losses caused by steam mass flow rate extractions are the highest in the fourth turbine segment and equal to 1687.82 kW.
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22
NaslovBlockchain-based application for certification management / Jovan Karamachoski, Ninoslav Marina, Pavel Taskov.
Materijalni opisGraf. prikazi.
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OpisBlockchain technology will bring a disruption in plenty of industries and businesses. Recently it proved the robustness, immutability, auditability, in many crucial practical applications. The blockchain structure offers traceability of actions, alterations, alerts, which is an important property of a system needed for development of sustainable technologies. A crucial part of the blockchain technology regarding the optimization of the processes is the smart contract. It is a self-executable computer code, open and transparent, encoding the terms of a regular contract. It is able to automate the processes, thus decreasing the human-factor mistakes or counterfeits. In this paper, we are presenting the feasibility of the blockchain technology in the certification processes, with an application developed for university diploma certification. The example is easily transferable in other areas and business models such as logistics, supply chain management, or other segments where certification is essential.
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23
NaslovCalculation of the plastic metal flow in the cold extrusion technology by finite volume method / Hazim Bašić, Ismet Demirdžić, Samir Muzaferija.
Materijalni opisIlustr.
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OpisThis paper presents an application of the finite volume method to ideal plastic metal flow in extrusion technology. Governing equations for the mass and momentum balance are used in an integral form. Solution domains in the cases considered are discretized with a Cartesian numerical mesh with computational points placed at the center of each control volume. After discretization of the governing equations, the resulting system of nonlinear algebraic equations is solved by an iterative procedure, using a segregated algorithm approach. Resulting stress fields are obtained from the Levy-Mises equations. The experimental results and numerical calculations are in good agreement.
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NaslovSix Sigma project for reducing manual handling of materials in real manufacturing company : case study / Atanas Kochov, Aleksandar Argilovski.
Materijalni opisGraf. prikazi.
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OpisThis paper presents a case study that is focusing on the improvement of the process of materials handling in real manufacturing company. Before the implementation of this project, the company was in a concerning state of incidents and learning events towards the ergonomics, health and safety of the operators who manually handled materials as part of their daily activities. It was proposed to use the Six Sigma framework in order to improve the process or design new process for performing the task that included manual handling of materials. In this study, through selecting suitable Six Sigma framework, mapping the current process, setting key performance indicators and using various design tools and techniques, process improvement is proposed; it will solve the problem, increase ergonomics and safety, but also increase the speed of the process and reduce the cost of spilled materials that were manually handled.
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NaslovUAV, digital processing and vectorization techniques applied to building condition assessment and follow-up / Carles Serrat, Sebastian Banaszek, Anna Cellmer, Vicenç Gilbert, Anna Banaszek.
Materijalni opisIlustr.
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OpisThe aim of the paper is to explain the basic principles of carrying out an inventory and follow-up of buildings and their condition assessment, by using the Full Interactive Visualization Method for Building Condition Assessment platform. It is a platform enabling the implementation of construction inventory based on the remote cooperation of many specialists in the field of, among others: building construction, architecture, civil engineering, photogrammetry, CAD, UAV. This type of cooperation is of particular importance especially in the context of the current epidemiological situation related to COVID-19. The idea of the presented platform fits into the broadly understanding of Building Information Modeling. After introducing the methodology, stages of the inventory and follow-up process carried out within the platform are illustrated and discussed on the basis of a case study. Based on the obtained results it can be concluded that the proposed methodology creates a convenient, efficient and inexpensive tool for massive inspection of building resources in large areas. The inventory is based primarily on high-quality photo and video material obtained from the deck of an unmanned aerial vehicle and the expert knowledge of the inspector conducting the inspection. By combining digital images data (photos, 3D model, orthophotos) with substantive data (facade element classification tables, wear / defect classification tables), we get a platform that allows intuitive access to viewing, classification, editing and analysis of selected data.
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NaslovTHD analysis of a seven, nine, and eleven level cascaded H-Bridge multilevel inverter for different loads / Manoj Kumar Sahu, Madhusmita Biswal, Jagan Mohana Rao Malla.
Materijalni opisGraf. prikazi.
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OpisA multilevel inverter is implemented for generating the required staircase AC voltage of output from various steps of voltages of DC sources. The multilevel inverter gives a better harmonic spectrum and a compatible quality of output. This article delves into an analytical analysis of the total harmonic distortion (THD) of different multilevel inverters which employ a multicarrier PWM technique. This technique is implemented for operating the switches at their respective angle of conduction. This paper deals with various cascaded H-Bridge multilevel inverters (CMI) with various loads that are modelled by implementing the MATLAB/Simulink platform. The output gives a better result of the proposed model in terms that it is helpful towards reducing the THD and the losses of switching.
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NaslovThe importance of SD goals indicators 7, 8, 9 and 12 in the industry development by using multi criteria and decision making method / Fisnik Osmani, Atanas Kochov, Betim Shabani, Mirjeta Ilazi.
Materijalni opisIlustr.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisSustainable Development and Decision Making are just two of the many processes that affect the industry sector. SDG7, SDG8, SDG9 and SDG 12 as four goals of sustainable development show the indicators we have to deal with, given that the energy, industry, economy and production are closely connected. This research focuses on promoting sustainable development in the industry, by testing very important indicators using the MCDM method. Our analysis was carried out with the help of a multi-criteria decision-making method - the Hierarchical Analytical Process. Through this method, we have identified specific areas that need improvement, the importance of the indicators separately, ranking so by their importance and impact in the industry, economy and production.
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NaslovSelection of an optimal supplier / Predrag Ćosić, Zdenka Keran, Vedran Kokot.
Materijalni opisGraf. prikazi.
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OpisThe paper describes the selection of an optimal supplier from China based on three obtained bids to produce 120,000 forged pieces, which is the primary process for shaft production. The choice was made using the AHP method based on the Expert Choice software program and Multiple-Criteria Decision-Making (MCDM). The key information when choosing the optimal supplier of large number of forgings is to define the objective of the task, decision tree with weighted criteria and sub-criteria, consistency checking and possible reconsideration using brain storming when defining the strength of criteria/sub-criteria. To some extent, this may reduce initial subjectivity in the decision-making process in the Decision Support System.
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NaslovThe simulation model of a student restaurant / Zvonimir Mihaljevic, Goran Dukic.
Materijalni opisIlustr.
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OpisThis paper features a simulation model of the FSB canteen. The data required for the simulation was collected through direct observation of the canteen during the busiest time of the day, that is, lunchtime. The simulation model was verified and validated based on the collected data. The model and the results of the simulation were presented. In order to reduce the waiting time, two modifications of the existing model were proposed and simulation models for both cases were also developed. After simulating the modified models, in order to determine the effects of the proposed modifications, the obtained results were analyzed and compared with the results of the existing system.
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30
3.632 (21-30)