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        <title>Acta Universitatis Sapientiae, Electrical and Mechanical Engineering Feed</title>
        <link>https://sciendo.com/journal/AUSEME</link>
        <description>Sciendo RSS Feed for Acta Universitatis Sapientiae, Electrical and Mechanical Engineering</description>
        <lastBuildDate>Sat, 04 Apr 2026 03:00:15 GMT</lastBuildDate>
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            <title>Acta Universitatis Sapientiae, Electrical and Mechanical Engineering Feed</title>
            <url>https://sciendo-parsed.s3.eu-central-1.amazonaws.com/6470c90c71e4585e08aa573f/cover-image.jpg</url>
            <link>https://sciendo.com/journal/AUSEME</link>
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        <copyright>All rights reserved 2026, Sapientia Hungarian University of Transylvania</copyright>
        <item>
            <title><![CDATA[A Review of Using Visual Odometery Methods in Autonomous UAV Navigation in GPS-Denied Environment]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2023-0002</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2023-0002</guid>
            <pubDate>Mon, 25 Dec 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

This review paper centers on strategies employed for location determination in regions lacking GPS signals. It primarily explores a range of vision-based methods tailored for this purpose, categorizing them accordingly. The article delves into the utilization of optical flow for feature extraction-based Visual Odometry (VO) and delves into advanced optical flow estimation methods that hinge on deep learning techniques. It compares the efficacy and practical applications of frequently utilized visual localization methods while also checking the efficiency of previous researches by reapplying the algorithms to new data and comparing the results.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Electrical Power Generator Faults Analysis Using Fault Tree and Bayesian Network]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2023-0004</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2023-0004</guid>
            <pubDate>Mon, 25 Dec 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

This paper presents a model to predict Electrical Power Generator (EPG) faults. The fault tree (FT) model is developed and used to help maintenance engineers in fault analysis procedure of this rotating machine. By identifying the main, intermediate and basic events it’s possible to construct the FT with logical reasoning. The top dreaded event is defined. By using a Bayesian network (BN) as a complementary tool, fault prediction of the EPG becomes possible and easy. By using the developed BN, the probability of occurrence of the top event (EPG failure) is calculated. Also, by this approach, we can process complex information that causes system faults in an easy and simple way. The essential elements to do this analysis are the reliable and good exploitation of the information previously stored in the system. The use of the BN in combination with the FT gives the possibility of qualitative and quantitative analysis, diagnosis, and prediction of faults from the same Bayesian model. The flexibility of the proposed BN model in this paper allows better and precise decision making. Also, priorities regarding maintenance job are defined and resources are a priori prepared.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[IoT Sensor Network Solution for Monitoring Wind Induced Waves in Shallow Water]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2023-0001</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2023-0001</guid>
            <pubDate>Mon, 25 Dec 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

This case study presents a possible solution for monitoring wind induced waves in shallow water lakes. Currently widely used instruments for measuring water waves are expensive due to extreme environmental requirements and the technology used. The use of IoT solutions is not common. Water wave measurements require low power consumption and medium to long range communication. Due to the network specifications, it is not obvious that LPWAN technologies are suitable for transmitting the amount of data generated. For the devices developed, LoRaWAN was investigated as the cheapest and 5G as the most reliable network solution, with attention to energy consumption.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Comparative Rheological Investigation of Nanocomposites of Surface Charged Superparamagnetic Iron Oxide Nanoparticles with Polyethylene Glycol]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2023-0005</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2023-0005</guid>
            <pubDate>Mon, 25 Dec 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

This paper focuses on a new investigation of the rheological properties of the nanocomposites of surface charged superparamagnetic iron oxide nanoparticles with polyethylene glycol. Both studied nanocomposites showed the steady-state behavior at 20 °C and 40 °C. Moreover, the increase of viscosity versus shear strain, shear rate or time for the nanocomposites was small at 60 °C. The effect of the coating of nanoparticles with the polymer was comparable for different nanocomposites. The data presented in this paper can provide the required information for the preparation of assemblies of nanocomposites with polymers.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Development of a Methodology for Assessing the Quality of Drilling Machines]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2023-0008</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2023-0008</guid>
            <pubDate>Mon, 25 Dec 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

Optimization is one of the best techniques used in industries to assess the quality of the drilling machine at a lower cost. This work is based on the rotary drilling mode with different methods based on the physicomechanical properties of the rock, machine setting parameters, and tool geometry parameters. The aim of the research presented is to develop quality of methods for determining the parameters of the rational operating regime of the rotary drilling machine during its operation in geological and mining conditions.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Numerical Study of Bottom Shape Effect on the Mixing for Stirred Tank]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2023-0007</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2023-0007</guid>
            <pubDate>Mon, 25 Dec 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

In this work, computational fluid dynamics (CFD) was used to investigate the effect of the bottom shape on the flow field and mixing characteristics in an agitated vessel stirred by six-pitched blade turbine (PBT6). The simulation was based on the resolution of the Navier-Stokes equations using standard k-ε turbulence model. Hydrodynamic behavior of the stirred vessel with four types of bottom shapes was investigated, a flat bottom and three different semi-elliptical bottoms. The results show reasonably satisfactory agreement with the experimental data. The CFD simulation also showed that the semi-elliptical bottom shapes had a significant influence on the velocity profiles and on the turbulent kinetic energy distributions of the local flow generated at the bottom region of the vessel.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Performance Analysis of Combining Beamforming and ZF/MMSE-SIC Equalization Techniques for MIMO DWPT-COFDM Systems]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2023-0003</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2023-0003</guid>
            <pubDate>Mon, 25 Dec 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

This study explores the enhancement of wireless communication through the integration of OFDM with MIMO and advanced techniques like COFDM, adaptive MIMO, and beamforming. It evaluates a 2×2 and 4×4 MIMO-DWPT-COFDM system, considering modulation (BPSK and QPSK) and equalization (ZF-SIC and MMSE-SIC) over a Rayleigh fading channel. MATLAB results reveal that more antennas, BPSK modulation, and MMSE-SIC equalization significantly improve BER performance. Specifically, for a BER of 10−4, the 2×2 MIMO system requires Eb / N0 values of 10.4 (MMSE-SIC) and 11.4 (ZF-SIC), while the 4×4 MIMO system needs 5.5 (MMSE-SIC) and 5.9 (ZF-SIC). These findings emphasize the need for thoughtful system design and parameter optimization in achieving reliable and efficient wireless communication.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Reactive Magnetron Sputtering Control Based on an Analytical Condition of Stoichiometry]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2023-0006</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2023-0006</guid>
            <pubDate>Mon, 25 Dec 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

The conditions for stoichiometric thin film deposition by reactive magnetron sputtering include the existence of a given ratio between the flux of the sputtered metallic atoms and the flux of the reactive gas molecules on the surface of the substrate. To meet this condition, a relationship based on the Berg model is formulated between the partial pressure of the reactive gas, the target coverage, and the sputtering current density. Given that the target coverage can be estimated online from the sputtering voltage, it is possible to create a control structure where the reactive gas partial pressure is controlled to obtain stoichiometric thin film deposition. Simulation results are presented based on the dynamic model of the sputtering process.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Nanofluids in Zigzag Elliptical Tube Heat Exchanger: A Design Perspective]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2022-0002</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2022-0002</guid>
            <pubDate>Thu, 05 Jan 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

Nanofluids contain nanometer-sized particles in suspension to enhance heat transfer by increasing the thermal conductivity. This paper provides an overview of particle size and volume fraction of nanofluids, and their roles in enhancing the heat transfer. Often, the transfer of heat is enhanced by dispersed particles with small diameter and high concentration despite some debate about the governing effects. The design of elliptical cross-section and zigzag tube also sheds insight into augmenting heat transfer for future research directions and applications.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Hydrodynamic Comparative Study on the Pumping Effects of a Square Tank Equipped with Single-Stage and Bi-Stage Impellers]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2022-0001</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2022-0001</guid>
            <pubDate>Thu, 05 Jan 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

A computational fluid dynamics simulation is done for comparative study from the pumping effect on the four surfaces of the stirred tank. The flow field generated by one-stage and bi-stage six-bladed Rushton turbine in the unbaffled square tank was studied. The Reynolds-averaged Navier-Stokes equation with steady-state multi-reference frame approach (MRF) is used to simulate hydrodynamic flow in the tank. The turbulent viscosity, the turbulent kinetic energy and mean velocity distributions obtained in vertical and horizontal plans are analyzed and discussed. We can deduce that the additional Rushton turbine in the upper part of the square tank improves the quality of the mixture.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Experimental Investigation on the Coating of Nickel-Base Super Alloy Using Wire Flame Spraying]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2022-0003</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2022-0003</guid>
            <pubDate>Thu, 05 Jan 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

Inconel738 is a nickel-based super alloy widely used in manufacturing gas turbines, particularly in the manufacture of blades that are in direct contact with hot gases during their operation. As a result, these blades are subjected to high temperatures, significant static and dynamic stresses, erosion and/or hot corrosion which can be very severe. The use of coatings is one of the most effective strategies to protect materials against corrosion and increase the wear resistance of materials. In this study, β-Ni-Al coatings were sprayed onto an Inconel738 substrate using a wire flame spraying process and characterization of coating has been made.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Control of Remote Robots by Means of Cell Phones]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2022-0004</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2022-0004</guid>
            <pubDate>Thu, 05 Jan 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

Since about two decades, cellular phones coupled to internet and wireless communications are offering many possibilities that can be exploited by classical telerobotics to free human operators from many constraints providing mobility and ubiquitous applications.
This paper presents the design and implementation of an experimental telerobotics system where the human operator supervises and controls remote robots by means of cell phones. To achieve this application, we used Java software namely J2ME platform which is dedicated for programming cell phones and J2SE platform for programming PCs. The adopted software technology of connection between the human operator and the remote robots uses the socket technique with client-server model. The cell phone held by the operator acts as a Client while a PC, situated at the remote robot site, acts as a Server. This application corresponds to Midlet-to-Servlet in Java terminology. Basic simulations and preliminary experiments have been successfully carried out with a three Degrees-of-Freedom (D.O.F) serial robot. These telerobotics systems based on cell phones are effectively offering interesting means to opening new perspectives for mobile and ubiquitous applications.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Optimal Power Sharing Control of the Hybrid Energy Storage System of an Electric Vehicle Along a Standard Driving Cycle]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2022-0005</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2022-0005</guid>
            <pubDate>Thu, 05 Jan 2023 00:00:00 GMT</pubDate>
            <description><![CDATA[

The paper presents a strategy of energy loss minimization within a hybrid energy storage system of an electrical vehicle, composed by a battery and a supercapacitor. The optimization of the power sharing between these energy storage devices is performed for the New European Driving Cycle, using the Particle Swarm Optimization algorithm. The minimum energy storage required to pass through the driving cycle is taken into account as a time-variable constraint during the optimization. The dimension of the search space increases with the dimension of the optimization vector, which has to be kept low in order to keep the complexity of the problem manageable. It is shown, that the subdivision, and piecewise optimization of the driving cycle improves the result by means of relaxation of the constraint represented by minimum level of the required energy storage.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Process Optimization of PVDF Piezoelectric Nanofiber Production via Electrospinning]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2021-0001</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2021-0001</guid>
            <pubDate>Thu, 30 Dec 2021 00:00:00 GMT</pubDate>
            <description><![CDATA[

The aim of this work was to investigate the effect of processing parameters of the electrospinning method on the resulting poly (vinylidene fluoride) (PVDF) fiber diameter. A three factorial Box-Behnken experimental design was employed to study the influence of applied voltage, the capillary-to-collector distance and the applied flow rate on the resulting fiber diameter. We successfully prepared bead-free PVDF nanofibers with fiber diameters ranging from 510-1300 nm. The experimental design analysis did not show significant influence of the studied process parameters under the used boundary conditions on the fiber diameter, thus indicating the robustness of the process.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Peculiarities of the Grinding Process of a Gear Hob Helical Rake Face]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2021-0004</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2021-0004</guid>
            <pubDate>Thu, 30 Dec 2021 00:00:00 GMT</pubDate>
            <description><![CDATA[

This paper presents a study regarding the gear hob’s rake face grinding possibilities and its consequences. A simple theoretical lined surface is considered. The mathematical model of the reciprocate meshing of surfaces was applied. It was proven that the proposed form of the rake face cannot be obtained because an undercut of inacceptable extent occurs. It is also proven and sustained by CAD modeling that using a simplified, flat grinding disk, the undercut is avoided, but the phenomenon of transection appears.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Investigation of the Thermodynamic Characteristics of the Ester Oil and R152a, R125, R134a and R123 Refrigerant Mixtures]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2021-0002</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2021-0002</guid>
            <pubDate>Thu, 30 Dec 2021 00:00:00 GMT</pubDate>
            <description><![CDATA[

The presence of the lubricant POE 68 in the refrigeration system changes the thermophysical properties of the refrigerant, which significantly affects the heat transfer and the hydraulic processes. The purpose of this research is to investigate the thermodynamic properties of the R152a, R125, R134a and R123 refrigerant and POE 68 lubricant mixtures at different temperatures from 233,15 to 313,15 K. There have been investigated the values of the densities and kinematic viscosities of the mixtures at different concentrations (100%, 90%, 80%). Finally, it was found that, the density and kinematic viscosity of the R123/POE 68 mixture were most affected by the change of the concentration.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Image Processing Methods for Gesture-Based Robot Control]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2021-0008</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2021-0008</guid>
            <pubDate>Thu, 30 Dec 2021 00:00:00 GMT</pubDate>
            <description><![CDATA[

In this paper we discuss some image processing methods that can be used for motion recognition of human body parts such as hands or arms in order to interact with robots. This interaction is usually associated to gesture-based control. The considered image processing methods have been experienced for feature recognition in applications involving human robot interaction. They are namely: Sequential Similarity Detection Algorithm (SSDA), an appearance-based approach that uses image databases to model objects, and Kanade-Lucas-Tomasi (KLT) algorithm which is usually used for feature tracking. We illustrate the gesture-based interaction by using KLT algorithm. We discuss the adaptation of each of these methods to the context of gesture-based robot interaction and some of their related issues.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Particle Swarm Optimization of a Hybrid Energy Storage System]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2021-0007</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2021-0007</guid>
            <pubDate>Thu, 30 Dec 2021 00:00:00 GMT</pubDate>
            <description><![CDATA[

The paper presents the energy loss minimization of a hybrid energy storage system used in an electric vehicle, composed by a battery and a supercapacitor. The optimization is carried out by searching the optimal power sharing between the energy storage devices. The power sharing factor is defined as a discrete time variable, with constant values during each subdivision of the driving cycle. The elements of the optimal solution vector are the power sharing factors and the time instants that define the subdivisions. The particle swarm optimization algorithms have been validated using the Rastrigin test function, and three versions of the boundary behaviour have been compared in case of the constrained optimization. The algorithms have been tested for the energy loss minimization in case of a simple driving cycle, and their performance has been assessed by statistical analysis for different swarm sizes.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Comparison of TCP SIAD and TCP BBR Congestion Control in Simulated 5G Networks]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2021-0009</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2021-0009</guid>
            <pubDate>Thu, 30 Dec 2021 00:00:00 GMT</pubDate>
            <description><![CDATA[

5G cellular networks have introduced a completely novel air interface called New Radio (NR). This technology delivers numerous benefits compared to previous generations, including significantly higher peak data rates. However, due to the propagation properties of the frequencies used in NR, the volatility of the available downlink capacity also increases. In this paper, we study two TCP congestion control algorithms which are designed to be able to quickly utilize sudden increases in available capacity. We present an implementation of TCP SIAD in the ns-3 open source network simulator and compare its performance with TCP BBR using the mmWave module of the simulator.
]]></description>
            <category>ARTICLE</category>
        </item>
        <item>
            <title><![CDATA[Implementation of Grid Synchronization Methods on a Real Time Development System]]></title>
            <link>https://sciendo.com/article/10.2478/auseme-2021-0005</link>
            <guid>https://sciendo.com/article/10.2478/auseme-2021-0005</guid>
            <pubDate>Thu, 30 Dec 2021 00:00:00 GMT</pubDate>
            <description><![CDATA[

The paper presents a study regarding the implementation of two representative grid synchronization methods, intended to be used in the control structure of a three phase switch mode voltage rectifier.
The methods considered are the Synchronous Reference Frame Phase Locked Loop (SRF PLL) and the Double Synchronous Frame Phase Locked Loop (DSRF PLL), respectively. These synchronization methods have been compared on a real time development system type dSpace 1104 from the point of view of their performance in case of an unbalanced mains voltage system. Finally, the influence of the chosen grid synchronization method on the performance of a synchronous reference frame controlled three-phase switch mode voltage rectifier is studied by simulation, and better results are demonstrated to be provided by the use of the DSRF PLL.
]]></description>
            <category>ARTICLE</category>
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