TY - JOUR A1 - Brune, Barbara A1 - Ortner, Irene A1 - Eder, Gabriele A1 - Voronko, Yuliya A1 - Gassner, Anika A1 - Berger, Karl Anton A1 - Oreski, Gernot A1 - Knöbl, Karl A1 - Neumaier, Lukas A1 - Feichtner, Markus T1 - Connecting material degradation and power loss of PV modules using advanced statistical methodology JF - Solar Energy Materials and Solar Cells KW - aging tests KW - power loss of PV modules KW - spectral measurements Y1 - U6 - http://dx.doi.org/https://doi.org/10.1016/j.solmat.2023.112485 VL - 260 SP - 112485 ER - TY - JOUR A1 - Brune, Barbara A1 - Ortner, Irene A1 - Eder, Gabriele A1 - Voronko, Yuliya A1 - Oreski, Gernot A1 - Berger, Karl Anton A1 - Knöbl, Karl A1 - Neumaier, Lukas A1 - Feichtner, Markus T1 - Quantifying the influence of encapsulant and backsheet composition on PV-power and electrical degradation JF - Progress in Photovoltaics Research and Applications KW - accelerated aging tests KW - statistical modelling KW - polyolefin materials Y1 - U6 - http://dx.doi.org/https://doi.org/10.1002/pip.3679 VL - Volume 31 IS - Issue 7 SP - 716 EP - 728 ER - TY - CHAP A1 - Giovagnola, Jessica A1 - Fernandez, Miguel Molina A1 - Beneder, Roman A1 - Schmitt, Patrick A1 - Pegalajar Cuellar, Manuel A1 - Morales Santos, Diego Pedro T1 - Multisensor Avionics Architecture for BVLOS Drone Services T2 - Journal of Physics: Conference Series ; 12th IEEE EASN International Conference EASN2022, Spain, Barcelona, Oct. 18-21, 2022 KW - Heterogeneous Sensor Fusion KW - Multicore Microcontroller KW - Artifical Intelligence KW - BVLOS Drone Services Y1 - U6 - http://dx.doi.org/10.1088/1742-6596/2526/1/012084 VL - Volume 2526 ER - TY - JOUR A1 - Neumaier, Lukas A1 - Eder, Gabriele A1 - Voronko, Yuliya A1 - Berger, Karl Anton A1 - Újvári, Gusztáv A1 - Knöbl, Karl T1 - Advanced UV-fluorescence image analysis for early detection of PV-power degradation JF - EPJ Photovoltaics KW - aging tests KW - Ultraviolet Fluorescence KW - UVF Imaging KW - service life estimation Y1 - U6 - http://dx.doi.org/https://doi.org/10.1051/epjpv/2023001 VL - 14 IS - Issue 9 ER - TY - CHAP A1 - Eder, Gabriele A1 - Voronko, Yuliya A1 - Berger, Karl Anton A1 - Újvári, Gusztáv A1 - Knöbl, Karl A1 - Neumaier, Lukas T1 - UV-Fluoreszenz Bildanalyse zur frühzeitigen Detektion von PV-Leistungsdegradation T2 - Tagungsband der Österreichische Fachtagung für Photovoltaik und Stromspeicherung 2022 KW - Alterungstest KW - Ultraviolet Fluorescence KW - UVF Imaging KW - Lebendauerbestimmung Y1 - ER - TY - CHAP A1 - Beneder, Roman A1 - Schmitt, Patrick A1 - Koernyefalvy, Clemens T1 - A Model-Based Approach for Remote Development of Embedded Software for Object Avoidance Applications T2 - 9th IEEE International Conference on Automation, Robotics and Applications ICARA2023, UNITED ARAB EMIRATES, ABU DHABI, Feb. 10-12, 2023 KW - Object Recognition KW - Indoor Object Avoidance KW - Real-Time Embedded Software KW - Sensor Fusion KW - Radar Sensor Y1 - U6 - http://dx.doi.org/10.1109/ICARA56516.2023.10125627 SP - 351 EP - 355 ER - TY - CHAP A1 - Beneder, Roman A1 - Schmitt, Patrick A1 - Koernyefalvy, Clemens T1 - A Model-Based Approach for Robotics Education with Emphasis on Embedded Systems T2 - 9th IEEE International Conference on Automation, Robotics and Applications ICARA2023, UNITED ARAB EMIRATES, ABU DHABI, Feb. 10-12, 2023 KW - Robotics Education KW - Embedded Systems Education KW - Control Systems KW - Embedded Software Y1 - U6 - http://dx.doi.org/https://doi.org/10.1109/ICARA56516.2023.10125977 SP - 1 EP - 5 ER - TY - CHAP A1 - Wagner, Fabian A1 - Jank, Miran A1 - Balz, Andrea A1 - Forjan, Mathias A1 - Urbauer, Philipp T1 - Immersive Spatial Planning in Healthcare: Developing a Pipeline to Automatically Convert Computer Aided DesignData to Virtual Reality T2 - dHealth 2023, 17th Annual Conference on Health Informatics meets Digital Health N2 - Equipping rooms used for medical purposes, like e.g., intensive care units, is an expensive and time-consuming task. In order to avoid extensive subsequent adjustments due to inappropriate layout visualization or geometric conditions difficult to identify in 2D plans, it is of utmost importance to provide an optimal planning environment to future users such as physicians and nurses. In this paper we present the concept of a fully automatized pipeline, which is designed to visualize computer aided design (CAD) data using virtual reality (VR). The immersive VR experience results in improvement of efficiency in the decision- making process during the planning phase due to better spatial imagination. The pipeline was successfully tested with CAD data from existing Intensive Care Units. The results indicate that the pipeline can be a valuable tool in the field of spatial planning in healthcare, due to simple usage and fast conversion of CAD data. The next step will be the development of a plugin for CAD tools to allow for interactions with the CAD models in Virtual Reality, which is not yet possible without manual intervention KW - Virtual Reality KW - Spacial Planning KW - Automation Y1 - U6 - http://dx.doi.org/https://doi.org/10.3233/shti230019 VL - 301 SP - 96 EP - 101 ER - TY - JOUR A1 - Lietze, Stefanie A1 - Langer, Karin A1 - Kertész, Dóra T1 - Wen informiere ich eigentlich (nicht)? Informationsmaterial im Bildungsbereich barrierefrei zugänglich machen JF - dvb forum: Inklusion N2 - Dieser Beitrag soll interessierten Laien eine Hilfestellung an die Hand geben, ihre Infomaterialien barriereärmer zu gestalten. Einführend erfolgt eine kurze Darstellung der rechtlichen und gesellschaftlichen Situation rund um das Thema Behinderung. Verschiedene Ebenen von Barrieren und Lösungsansätze werden vorgestellt: Organisationale Barrieren von Bildungseinrichtungen werden ebenso wie Barrieren rund um das Bildungsberatungsgespräch adressiert. Der Schwerpunkt liegt bei auf der Gestaltung von Informationsmaterial. Neben einem theoretischen Hintergrund über Lösungsansätze werden praktische Umsetzungen für verschiedene Medien vorgestellt. Der Beitrag wird durch Beispiele guter Praxis in der Umsetzung, eine Checkliste zur Anwendung und weiterführende Ressourcen abgerundet. KW - Inklusion KW - Barrierefreiheit Y1 - VL - 62 IS - 1 SP - 10 EP - 16 PB - wbv Publikation ER - TY - JOUR A1 - Kuba, Markus A1 - Panholzer, Alois T1 - Tree evolution processes for bucket increasing trees JF - Discrete Mathematics N2 - Bucket increasing trees are multilabelled generalizations of increasing trees, where each non-leaf node carries b labels, with a fixed integer. We provide a fundamental result, giving a complete characterization of all families of bucket increasing trees that can be generated by a tree evolution process. We also provide several equivalent properties, complementing and extending earlier results for ordinary increasing trees to bucket trees. Additionally, we state second order results for the number of descendants of label j, again extending earlier results in the literature. KW - Increasing trees KW - multilabelled trees KW - tree evolution processes Y1 - U6 - http://dx.doi.org/https://doi.org/10.1016/j.disc.2023.113443 VL - Vol. 346 IS - Issue 7 SP - 113443 ER - TY - JOUR A1 - Fibich, Christian A1 - Schmitt, Patrick A1 - Höller, Roland A1 - Rössler, Peter T1 - Open-Source Ethernet MAC IP Cores for FPGAs: Overview and Evaluation JF - International Journal of Reconfigurable Computing KW - Ethernet KW - FPGA KW - Design Reuse KW - IP Core KW - Open Source Y1 - U6 - http://dx.doi.org/https://doi.org/10.1155/2023/9222318 VL - 2023 SP - Article ID 9222318 ER - TY - JOUR A1 - Himmelstoss, Felix T1 - Design of State-Space Controllers with the Help of Signal Flow Graphs Shown for a Buck Converter JF - WSEAS Transactions on Power Systems, Volume 21, 2022, pp. 421-429 KW - DC/DC converter KW - Buck converter KW - modelling KW - simulation KW - state space controller Y1 - U6 - http://dx.doi.org/10.37394/23202.2022.21.46 VL - Volume 21 SP - 421 EP - 429 ER - TY - JOUR A1 - Himmelstoss, Felix A1 - Votzi, Helmut T1 - Simple Chargers for a Small DC Micro-Grid for a Home Emergency Power System JF - Electricity KW - micro-grid KW - Buck converter KW - Boost converter KW - hysteresis control Y1 - U6 - http://dx.doi.org/https://doi.org/10.3390/electricity4030013 VL - 4 IS - 3 SP - 216 EP - 234 ER - TY - JOUR A1 - Himmelstoss, Felix T1 - Quasi Resonant Zero Current Switching Modified Boost Converter (QRZCSMBC) JF - WSEAS Transactions on Power Systems KW - DC/DC converter KW - modified boost converter KW - inrush current KW - zero current switching ZCS KW - simulation Y1 - U6 - http://dx.doi.org/10.37394/23201.2023.22.8 VL - Volume 22 SP - 55 EP - 62 ER - TY - JOUR A1 - Himmelstoss, Felix T1 - Third order converters with current output for driving LEDs JF - WSEAS Transactions on Power Systems KW - DC/DC converters KW - current output KW - limited duty cycle converter KW - simulation KW - modeling Y1 - U6 - http://dx.doi.org/10.37394/232016.2022.17.40 VL - Volume 17 SP - 402 EP - 409 ER - TY - JOUR A1 - Marc, Zobel A1 - Knapp, Bernhard A1 - Nateqi, Jama A1 - Martin, Alistair T1 - Correlating global trends in COVID-19 cases with online symptom checker self-assessments JF - PLOS ONE N2 - Background Online symptom checkers are digital health solutions that provide a differential diagnosis based on a user’s symptoms. During the coronavirus disease 2019 (COVID-19) pandemic, symptom checkers have become increasingly important due to physical distance constraints and reduced access to in-person medical consultations. Furthermore, various symptom checkers specialised in the assessment of COVID-19 infection have been produced. Objectives Assess the correlation between COVID-19 risk assessments from an online symptom checker and current trends in COVID-19 infections. Analyse whether those correlations are reflective of various country-wise quality of life measures. Lastly, determine whether the trends found in symptom checker assessments predict or lag relative to those of the COVID-19 infections. Materials and methods In this study, we compile the outcomes of COVID-19 risk assessments provided by the symptom checker Symptoma (www.symptoma.com) in 18 countries with suitably large user bases. We analyse this dataset’s spatial and temporal features compared to the number of newly confirmed COVID-19 cases published by the respective countries. Results We find an average correlation of 0.342 between the number of Symptoma users assessed to have a high risk of a COVID-19 infection and the official COVID-19 infection numbers. Further, we show a significant relationship between that correlation and the self-reported health of a country. Lastly, we find that the symptom checker is, on average, ahead (median +3 days) of the official infection numbers for most countries. Conclusion We show that online symptom checkers can capture the national-level trends in coronavirus infections. As such, they provide a valuable and unique information source in policymaking against pandemics, unrestricted by conventional resources. KW - Online symptom checkers KW - coronavirus disease Y1 - U6 - http://dx.doi.org/https://doi.org/10.1371/journal.pone.0281709 VL - 18 IS - 2 ER - TY - CHAP A1 - Himmelstoss, Felix A1 - Windisch, Michael T1 - A capacitor-free driving stage for light emitting diodes T2 - 21th International Conference on Renewable Energies and Power Quality (ICREPQ’23) Madrid (Spain), 24th to 26th May 2023 N2 - Electrolytic capacitors have the disadvantage of pronounced aging. Non-electrolytic capacitors are therefore used in applications where long-life is important. In this paper we present a driving stage for LEDs without any capacitive elements. The basic topology is a Buck converter with one coil, one active, and one passive switch. Instead of the output capacitor, series connections of one or more LEDs and an active switch are connected. An additional diode is connected between the output and the input to achieve a current path, when all LED- paths are off. A nonlinear hysteresis controller is used to achieve a robust control. A system with three switchable LED-strings is analyzed. Design hints are given and the function is proved with the help of LTSpice simulations. The system can be used for lighting purposes with the possibility to change the chrominance. The potentiality to transmit data is also treated. KW - DC-to-DC converter KW - stray inductance KW - recuperation KW - active snubber Y1 - U6 - http://dx.doi.org/10.24084/repqj21.278 VL - Vol. 21 SP - 220 EP - 225 ER - TY - CHAP A1 - Himmelstoss, Felix A1 - Windisch, Michael T1 - Tapped inductor Boost with exploitation of the stray energy T2 - Proceedings of 2022 IEEE 20th International Power Electronics and Motion Control Conference (PEMC 2022), Brasov, Rumania, Sep. 25-29 N2 - Tapped inductor DC-to-DC converters are interesting circuits, the winding ratio of the two windings mounted on the same core change the voltage transformation ratio compared to the untapped inductor. The tapped inductor converters are especially useful, when high or low voltage transformation ratios have to be realized. The disadvantage of this concept is that the coupling between the two windings is not total and can be described by the stray or leakage inductance. This stray inductance leads to a high overvoltage at the active switch, and therefore also across other elements of the converter. After a short summery of the ideal tapped Boost converter, the design of an RCD snubber which limits the overvoltage is explained. To improve the efficiency of the converter two active snubber networks are treated, which feed the energy stored in the snubber capacitor into the input source or into the output circuit. Simulations are used to prove these considerations. KW - DC/DC converter KW - stray inductance KW - recuperation KW - active snubber Y1 - U6 - http://dx.doi.org/10.1109/PEMC51159.2022.9962849 SP - 75 EP - 80 ER - TY - CHAP A1 - Himmelstoss, Felix A1 - Votzi, Helmut T1 - Two-Stage Step-up Converter with Different Voltage Transformation Ratios depending on the Duty Cycle T2 - 20th International Conference on Renewable Energies and Power Quality (ICREPQ’22) Vigo (Spain), 27th to 29th July 2022 N2 - A two-stage converter with high output voltage ratio and reduced current stress of the inductors and partly reduced voltage stress is discussed. The function is explained with the help of voltage and current diagrams. The voltage transformation ratio changes between a quadratic step-up for duty cycles lower 0.5 and a double Boost converter for duty cycles higher than 0.5. Dimensioning hints, the control law for feed-forward controls, the transient when the supply is turned on is discussed and some simulations are given. A comparison to other two-stage converters is also treated. KW - Quadratic boost KW - double boost converter KW - feed-forward control KW - start-up Y1 - U6 - http://dx.doi.org/10.24084/repqj20.218 VL - Vol. 20 SP - 66 ER - TY - CHAP A1 - Fibich, Christian A1 - Horauer, Martin A1 - Obermaisser, Roman T1 - Bitstream-Level Interconnect Fault Characterization for SRAM-based FPGAs T2 - Proceedings of the 2023 Design, Automation & Test in Europe Conference & Exhibition (DATE 2023), pp. 1-2, 16-18 April 2023, Antwerp, Belgium KW - FPGA KW - Fault Injection KW - Interconnect Fault Y1 - U6 - http://dx.doi.org/10.23919/DATE56975.2023.10136911 ER -