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Tehnika
ISSN 0040-2176 · Union of Engineers and Technicians of Serbia · 1,138 articles in the index
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Comparison of the requirements of ISO 17020 and ISO/IEC 17025 standards with the proposed new ISO/IEC 17020 standard and the obligations imposed on vehicle inspection bodies
This paper provides a detailed review of the requirements of SRPS ISO 17020:2012 and SRPS ISO/IEC 17025:2017, with particular emphasis on the forthcoming changes introduced by the new SRPS ISO/IEC 17020:2026 standard. The main conclusions of the analysis indicate that these standards are…
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Micromobility in sustainable urban transport: Safety challenges and regulatory responses
Micromobility has become an important component of urban transport, offering flexible and environmentally friendly solutions for short-distance travel. Electric scooters and bike-sharing systems are increasingly integrated into sustainable mobility strategies aimed at reducing emissions and…
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Solar incident angles for flat surfaces equipped with different single-axis sun tracking strategies
This paper presents theoretical models for determining solar incidence angles for flat surfaces (flat solar devices) equipped with the following single-axis tracking strategies for the position of the Sun: horizontal (1) E-W and (2) N-S rotation axes, (3) inclined N-S rotation axes, (4) polar (the…
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Chemically modified chitosan for real-time direct laser writing of microstructures
In this paper, chemically modified chitosan is presented as an environmentally friendly, optically transparent, elastic and durable material for the fabrication of various microstructures in real time. The brittle chitosan layer was chemically modified to become elastic and stretchable, while the…
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Change of transition curve type in reconstruction of railway lines
The importance of applying transition curves in railway design was recognized as early as the nineteenth century, with the development of railway transport. Railway lines in Serbia were originally designed using the cubic parabola as the transition curve. During the rehabilitation and…
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An adaptive organizational model: integrating investment, financial functions, and human resource management in the entertainment industry
This paper analyzes the significance of adaptive organizational models in contemporary business environments, with particular emphasis on their role in financial, strategic, and organizational management. Adaptive organizational models are characterized by their ability to integrate the financial…
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Sustainable groundwater management for irrigation in organic agriculture
Sustainable irrigation is one of the key prerequisites for stable and long-term responsible agricultural production, particularly under conditions of climatic variability, increasingly frequent drought episodes, and growing pressure on water resources. In organic agriculture, irrigation assumes…
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Analysis of the impact of the FMEA method on reducing failure rate and increasing the reliability of SCP pumps
This paper analyzes the impact of implementing preventive maintenance procedures based on the FMEA (Failure Modes and Effects Analysis) method on the failure rate and reliability of split-case centrifugal pumps (SCP pumps). The research was conducted under real industrial operating conditions on an…
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ISO 14001:2026 model: Basic characteristics
ISO14001:2026, a standard for Environmental Management Systems (EMS) that replaces ISO14001:2015, was published on April 15, 2026. The new model modernizes the requirements to meet modern environmental challenges and increase the practical applicability of EMS in organizations of all sizes and…
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Metrological traceability of touch voltage measurements using FSM concept in the high-voltage facility
In order to avoid interruption of service and costly downtime, touch voltage measurements are usually performed in an energized high-voltage substation. Due to conductive interference in the grounding system (usually several amperes, up to about 15 A), caused by power frequency, its harmonics and…
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Analysis of pedestrian speeds at signalized crosswalks
Using a representative pedestrian speed when defining the operation of traffic signals at signalized intersections is crucial for the safety and efficiency of pedestrian flows. This study determined the representative pedestrian speed (15th percentile of pedestrian speed) as well as the factors…
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Managing criminal-law risks in the use of artificial intelligence: The framework of the Council of Europe and the Republic of Serbia, with reference to European Union law
The increasing use of artificial intelligence systems raises important questions regarding criminal liability and the management of legal risks associated with their application. A particular challenge is determining how existing criminal law concepts apply when AI systems are used in ways that may…
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Power losses in elevator systems and efficiency coefficient analysis
To be able to carry out a high-quality analysis of the operation and design of elevator systems with a driving pulley, it is necessary to determine the size of the losses that occur in the drive mechanism and elevator guide rails. An analysis of the resistance, i.e., the source of power losses in…
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Identification and evaluation of risks on the example of an accredited laboratory for the calibration of geodetic instruments
The accreditation of testing and calibration laboratories in Serbia is carried out by the Accreditation Body of Serbia in accordance with the SRPS/ISO 17025:2017 standard. The standard prescribes the obligation to address risks and opportunities related to the impartiality of the laboratory as a…
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Comparison of effective green time in different traffic systems
In the management process, green time can be viewed from two aspects: real and effective green time. Real green time is defined as the time interval during which a certain signal group is displayed with a green signal term. Effective green time is defined as the period of time during which a…
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Correlation analysis of quality of service indicators of mining machinery for life cycle management
Life cycle management of mining machinery represents a continuous engineering challenge. The operational quality of machinery, defined as the machine's ability to continuously fulfill its designed functions under actual operating conditions, is a fundamental indicator of its current condition and…
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Hydrogen storage technologies and materials: Progress, challenges, and paths towards a sustainable hydrogen economy
Hydrogen, with its high gravimetric energy density (≈120 MJ kg-1) and no carbon dioxide emissions from combustion or electrochemical oxidation, is a key element for decarbonization and the integration of renewable energy sources. However, its low volumetric density at ambient conditions (0.0899 kg…
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Integration of CAD modeling and SLA printing in the process of engineering damaged parts
Modern CAD software tools, in combination with additive manufacturing technologies, represent an efficient approach to the production of prototypes and spare parts in contemporary engineering. Their application is particularly significant in situations involving damage or failure of specific…
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AI assistants in technical education and e-learning
The development of artificial intelligence and natural language processing has enabled the creation of digital assistants that can effectively support teaching in higher education. This paper presents the process of creating a digital assistant, a chatbot that uses AI models to support students in…
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Application of the LEAP model for quantitative sensitivity analysis of CO₂ emissions from the heating system of the residential sector of Bosnia and Herzegovina
This paper presents a quantitative analysis of the sensitivity of CO₂ emissions in the heating sector of residential buildings in Bosnia and Herzegovina, developed using the LEAP (Low Emissions Analysis Platform) model. The research is focused on two subsystems: individual houses that have not been…
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