Iskanje po katalogu digitalne knjižnice

Opis: This paper analyzes the influence of inverter-interfaced distributed generations’ (IIDGs) response during transmission network faults. The simplest and safest solution is to switch IIDGs off during network faults without impacting the network voltages. A more elaborate and efficient concept, required by national grid codes, is based on controlling the IIDGs’ currents, involving positive- and negative-sequence voltage measured at the connection point. In this way the magnitude and phase of the injected currents can be adjusted, although the generated power will depend on the actual line voltages at the connection point. Therefore, an improved concept is proposed to adjust IIDGs’ fault current injection through the required active and reactive power, employing the same voltage characteristics. The proposed, i.e., power-based concept, is more definite than the currentbased one, since the required power will always be generated. The discussed concepts for the fault current injection by IIDGs were tested in different 110-kV networks with loop and radial topologies, and for different short-circuit capabilities of the aggregated network supply. Based on extensive numerical calculations, the power-based concept during transmission networks faults generates more reactive power compared to the current-based concept. However, the voltage support by IIDGs during transmission networks faults, regardless of the concept being used, is influenced mainly by the short-circuit capability of the aggregated network supply. As regards distance protection operation, it is influenced additionally by the network topology, i.e., in radial network topology, the remote relay’s operation can be delayed due to a largely seen impedance.
Ključne besede: distributed generation, fault current injection, voltage support, distance protection, transmission network faults
Objavljeno v DKUM: 16.06.2025; Ogledov: 0; Prenosov: 2
Celotno besedilo (1,39 MB)
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Opis: This paper presents a grammarware-based approach to developing active video games (AVGs) for sensor-driven training systems. The GCGame domain-specific language (DSL) is introduced to define game logic, sensor interactions, and timing behavior formally. This approach ensures cross-platform consistency, supports real-time configurability, and simplifies the integration of optimization and visualization tools. The presented system, called GCBLE, serves as a case study, demonstrating how grammarware enhances modularity, maintainability, and adaptability in real-world physical interaction applications. The results highlight the potential of a DSL-driven design to bridge the gap between developers and domain experts in embedded interactive systems
Ključne besede: active video games, grammarware, internet of things, DSL, procedural level generation, evolutionary computation, game controllers
Objavljeno v DKUM: 23.04.2025; Ogledov: 0; Prenosov: 4
Celotno besedilo (4,32 MB)

Opis: : There has been growing interest and increasing attention in the field of functional clothing textiles, particularly in product and process development, as well as innovations in heat-generating, retaining, and releasing fibers to maintain a healthy body temperature without relying on unsustainable energy sources. This study, for the first time, reports the various physio-mechanical properties of surface-functionalized regenerated cellulose fibers (RCFs) coated with ceramic particles. The coating imparts photothermal conversion-based heat generation and retention properties with the aid of polyelectrolyte binders. In this design, ZrC enables the conversion of light energy into thermal energy, providing heat for the human body. A feasible coating process was employed, utilizing industrially feasible exhaustion methods to deposit the ZrC particles onto the RCF surface in conjunction with two distinctive polymeric binders, specifically polyethyleneimine (PEI) and polydiallyldimethylammonium chloride (polyDADMAC). The morphological characteristics and tensile properties of the coated RCFs were analyzed via scanning electron microscopy (SEM) and single-fiber tensile testing. Heat retention and release behaviors of a bundle of fiber samples were assessed using infrared (IR) imaging and an IR emission lamp setup. The SEM results confirmed the successful coating of the ZrC particles on the surface of the RCF samples, influencing negligible on their physical–mechanical properties. The heat retention of the coated RCFs with ZrC and both binders was higher than that of reference regenerated cellulose fibers (RCFs), demonstrating their effective heat generation, retention, and heat release properties. Based on the highlighted prominent results for the coated RCFs, these findings highlight the suitability of the developed functional clothing textiles for targeted applications in non-extreme thermal conditions, ensuring thermo-physiological comfort by maintaining body temperature within a tolerable thermal range (36.5–37.5 ◦C), in contrast to studies reporting significantly higher temperatures (50–78 ◦C) for extreme thermal conditions.
Ključne besede: regenerated cellulose fibers, RCFs, ceramic particles, zirconium carbide, ZrC, surface functionalization, heat generation and retention
Objavljeno v DKUM: 01.04.2025; Ogledov: 0; Prenosov: 131
Celotno besedilo (9,11 MB)
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Opis: The increasing adoption of 2D/3D laser line sensors in industrial and research applications necessitates accurate and efficient simulation tools for tasks such as surface inspection, dimensional verification, and quality control. This paper presents a novel algorithm developed in MATLAB for simulating the measurements of any 2D/3D laser line sensor on STL CAD models. The algorithm uses a modified fast-ray triangular intersection method, addressing challenges such as overlapping triangles in assembly models and incorporating sensor resolution to ensure realistic simulations. Quantitative analysis shows a significant reduction in computation time, enhancing the practical utility of the algorithm. The simulation results exhibit a mean deviation of 0.42 mm when compared to real-world measurements. Notably, the algorithm effectively handles complex geometric features, such as holes and grooves, and offers flexibility in generating point cloud data in both local and global coordinate systems. This work not only reduces the need for physical prototyping, thereby contributing to sustainability, but also supports AI training by generating accurate synthetic data. Future work should aim to further optimize the simulation speed and explore noise modeling to enhance the realism of simulated measurements.
Ključne besede: 2D/3D laser line sensor, profilometry, simulation, point cloud, measurement generation, STL, Matlab
Objavljeno v DKUM: 10.01.2025; Ogledov: 0; Prenosov: 12
Celotno besedilo (8,99 MB)
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Opis: The main purpose of this study was to examine the ethicality of future employees’ attitudes toward advancement in the workplace in Slovenia and Lithuania. This study focuses on students representing young adults from Generation Z as future employees in organizations. Using a survey of work-related issues, we collected 212 answers from Slovenian and 159 from Lithuanian' students from business faculties. We used t-tests and regression analyses to obtain results. We found that the future employees in Slovenia see organizationally beneficial behavior and self-indulgent behavior significantly more acceptable for their advancement, than their Lithuanian peers. No differences exist in the perception of destructive behavior among participants from both countries. Substantial differences in the importance of personal values ​​among Generation Z members in both societies, provide a strong support for the divergence nature of Generation Z across cultures. The impact of personal values on the ethicality of different behavior for advancement in the workplace among future employees in both societies is substantial, but biased and follows different patterns. In Slovenia, the dominant role has power, followed by hedonism, benevolence, security, conformity, tradition, and universalism, while in Lithuania, the dominant role belongs to self-direction, followed by tradition, universalism, security, achievement, and power. This study will help us to understand Generation Z values and their perceptions regarding ethicality of advancement in the workplace and enable organizations to manage the behavior of future employees.
Ključne besede: Generation Z, personal values, Slovenia, Lithuania, unethical practices, ethicality, behavior, advancement in the workplace
Objavljeno v DKUM: 11.07.2024; Ogledov: 88; Prenosov: 13
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