@phdthesis{Muench2026, author = {M{\"u}nch, Justin}, title = {Mehrwert von Methoden des Maschinellen Lernens f{\"u}r die simulative Bewertung der Versorgungssicherheit mit Elektrizit{\"a}t}, publisher = {Hochschule D{\"u}sseldorf}, address = {D{\"u}sseldorf}, doi = {10.20385/opus4-5830}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-58306}, school = {Hochschule D{\"u}sseldorf}, pages = {126}, year = {2026}, abstract = {Politik und Wirtschaft sind auf eine fundierte, schnelle und flexible Bewertung der Ver-sorgungssicherheit mit Elektrizit{\"a}t als Grundlage strategischer Entscheidungen angewiesen. Dazu werden komplexe probabilistische Simulationsmodelle unter Einbeziehung einer hohen Anzahl m{\"o}glicher Zukunftsszenarien verwendet. Allerdings schr{\"a}nken die langen Rechenlaufzeiten von mehreren Stunden pro Szenario die Analysetiefe ein. Zudem werden die Analysen durch die Prognose der zeitlich aufgel{\"o}sten zuk{\"u}nftigen Randbedingungen erschwert. Die vorliegende Arbeit zeigt, dass sich mit Methoden aus dem Bereich des Maschinellen Lernens (ML) in Kombination mit angepassten Methoden des Design of Experiments die Kennzahlen der Versorgungssicherheit mit Elektrizit{\"a}t aus einem komplexen Simulationsmodell auf Basis rekursiver Faltungen sehr gut approximieren lassen. Die Zeitreduktion im Vergleich zum nativen Simulationsmodell ist sehr hoch, bei gleichzeitig hoher Genauigkeit. Auch im Bereich der Prognose zeitlich aufgel{\"o}ster Randbedingungen demonstrieren die Ergebnisse ein erhebliches Verbesserungspotenzial von ML-Methoden im Vergleich zu klassischen Verfahren. Zusammengefasst sind die untersuchten und vorgeschlagenen ML-Methoden in der Lage, die Versorgungssicherheit mit Elektrizit{\"a}t komplexit{\"a}tsgerecht (tausende von Zukunftsszenarien) in praktikabel kurzer Zeit (weniger als eine Stunde) detailliert zu analysieren.}, subject = {Deep Learning}, language = {de} } @misc{OPUS4-6085, title = {1045 - Vierte Satzung zur {\"A}nderung der Pr{\"u}fungsordnung f{\"u}r den Masterstudiengang „Umweltingenieurwesen" an der Hochschule D{\"u}sseldorf vom 18.02.2026}, address = {D{\"u}sseldorf}, organization = {Hochschule D{\"u}sseldorf}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-60857}, pages = {2}, year = {2026}, abstract = {Aufgrund der \S\S 2 Abs. 4, 64 Abs. 1 des Gesetzes {\"u}ber die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz - HG) vom 16.09.2014 (GV. NRW. S. 547) in der aktuell g{\"u}ltigen Fassung hat die Hochschule D{\"u}sseldorf die folgende Ordnung als Satzung erlassen.}, language = {de} } @misc{OPUS4-6084, title = {1044 - Erste Satzung zur {\"A}nderung der Pr{\"u}fungsordnung f{\"u}r den Bachelorstudiengang Haus-, Energie- und Anlagentechnik (HEAT) an der Hochschule D{\"u}sseldorf vom 18.02.2026}, address = {D{\"u}sseldorf}, organization = {Hochschule D{\"u}sseldorf}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-60846}, pages = {2}, year = {2026}, abstract = {Aufgrund der \S\S 2 Abs. 4, 64 Abs. 1 des Gesetzes {\"u}ber die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz - HG) vom 16.09.2014 (GV. NRW. S. 547) in der aktuell g{\"u}ltigen Fassung hat die Hochschule D{\"u}sseldorf die folgende Ordnung als Satzung erlassen.}, language = {de} } @article{BergmannHaddadThoelkeJeongetal.2026, author = {Bergmann, Marie and Haddad-Thoelke, Pascale and Jeong, Haeran and Kappeler, Ron and Altug, Hicran and Oberwinster, Lukas and Boogaard, Hanna and Pohl, Tobias and Soppa, Vanessa and Ogurtsova, Katherine and Joss, Meltem Kutlar and Andersen, Zorana Jovanovic and Hoffmann, Barbara}, title = {Systematic review and meta-analysis on the health effects of long-term exposure to ultrafine particles}, series = {European Respiratory Review}, volume = {35}, journal = {European Respiratory Review}, number = {179}, publisher = {European Respiratory Society}, issn = {1600-0617}, doi = {10.1183/16000617.0156-2025}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-60272}, pages = {39}, year = {2026}, abstract = {Background Ultrafine particles (≤100 nm diameter) may have a higher toxicity than larger particles but are still not regulated nor part of routine air pollution monitoring. So far, health effects of long-term exposure to ambient ultrafine particles are not well understood, owing to a lack of exposure data and epidemiological studies. Methods We conducted a systematic review and meta-analysis on the health effects of long-term exposure to ultrafine particles, including studies published until December 2024. A meta-analysis was conducted for outcomes with at least four available effect estimates. Confidence in the body of evidence was evaluated using the Office of Health Assessment and Translation method. Results We identified 85 studies investigating various mortality, morbidity and subclinical outcomes. In meta-analyses of single-pollutant models, we found positive associations with natural mortality (hazard ratio 1.06, 95\% CI 1.04-1.08) and C-reactive protein (10.14\% increase (95\% CI -0.51-21.99\%) per 10 000 pt·cm-3 increase in long-term exposure to ultrafine particles, with low and inadequate levels of evidence, respectively. The remaining studies revealed overall limited evidence for adverse effects on a wide range of outcomes. Less than half of the studies adjusted for co-pollutants. Conclusion The evidence base on long-term health effects of ultrafine particles has increased substantially in the past decade, while the overall evidence for independent effects of long-term ultrafine particle exposure remains inadequate to low. More studies are needed to draw firm conclusions about the independent adverse effects of long-term ultrafine particles on various health end-points, with a special focus on the influence of co-pollutant adjustment.}, subject = {Schadstoffbelastung}, language = {en} } @article{MandalMannaBiswasetal.2026, author = {Mandal, Dipak Kumar and Manna, Nirmal K. and Biswas, Nirmalendu and Rudra, Tansu and Kumar, Rajesh and Benim, Ali Cemal}, title = {Enhanced heat transport in magneto-nanofluidic thermal systems: adiabatic block effects in grooved channels and ANN modeling}, series = {International Journal of Thermofluids}, volume = {31}, journal = {International Journal of Thermofluids}, publisher = {Elsevier}, issn = {2666-2027}, doi = {10.1016/j.ijft.2025.101515}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-60127}, year = {2026}, abstract = {This study investigates heat transfer enhancement in magneto-nanofluidic systems through the strategic placement of adiabatic blocks in grooved channels. Using CuO-H2O nanofluid in a bottom-heated channel with circular expansion, we examine the complex interactions between forced convection, magnetic fields, and uoyancy effects. Through systematic numerical analysis, we explore the combined influences of Rayleigh, Reynolds, and Hartmann numbers on thermal performance. Our findings reveal significant heat transfer enhancement (up to 137 \%) under optimal conditions, particularly with vertical magnetic field orientation at Re = 100 and Ha = 30. The results demonstrate how adiabatic blocks modify flow structures, with larger blocks diminishing vortex intensity while elevated Ra generates secondary vortices that interact with primary circulations. Magnetic field effects show notable dependence on orientation, with vertical fields generally promoting better heat transfer than horizontal configurations. To complement the numerical analysis, we develop a predictive model using Artificial Neural Network (ANN) for Nusselt numbers across various operating conditions, achieving over 99 \% accuracy. The integrated computational-ANN approach offers significant advancements in optimizing thermal systems in various areas, ranging from electronics cooling to microfluidic devices.}, language = {en} } @article{BatosRueppJahretal.2015, author = {Batos, Andrej and Ruepp, Maximilian and Jahr, Andreas and Corves, Burkhard}, title = {Ermittlung der Biege- und Schnitteigenschaften von Halmgut mit einem Universalpr{\"u}fstand}, series = {LANDTECHNIK}, journal = {LANDTECHNIK}, publisher = {Kuratorium f{\"u}r Technik und Bauwesen in der Landwirtschaft e.V.}, doi = {10.15150/LT.2015.2663}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-59856}, pages = {84 -- 96}, year = {2015}, language = {de} } @article{CarstenMonikaJoergetal.2018, author = {Carsten, St{\"o}hr and Monika, Janssen and J{\"o}rg, Niemann and Benedikt, Reich}, title = {Smart Services}, series = {Procedia - Social and Behavioral Sciences}, volume = {238}, journal = {Procedia - Social and Behavioral Sciences}, edition = {SIM 2017 / 14th International Symposium in Managemen}, publisher = {Elsevier}, issn = {1877-0428}, doi = {10.1016/j.sbspro.2018.03.023}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-59819}, pages = {192 -- 198}, year = {2018}, language = {en} } @article{ShajahanBenim2026, author = {Shajahan, Mohamed Iqbal and Benim, Ali Cemal}, title = {Granular PCM based heat sink for electronics thermal management}, series = {Applied Thermal Engineering}, volume = {286}, journal = {Applied Thermal Engineering}, publisher = {Elsevier}, issn = {1359-4311}, doi = {10.1016/j.applthermaleng.2025.129336}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-59649}, year = {2026}, abstract = {This study investigates aluminum heat sinks integrated with GR42 phase change material (PCM), aiming to enhance thermal inertia and stabilize device temperatures. This is important, since the increasing miniaturization and performance demands for electronic devices have led in a growing need for advanced thermal management systems capable of handling rapid transient loads. The novelty of the work lies in examining different heat sink layouts that optimize the heat dissipation capabilities of GR42 PCMs while minimizing size and weight for electronic cooling. The experimental testing was conducted using three configurations, namely no fin, circular fin and hexagonal fin, with three input powers (4 W, 8 W, and 12 W). The experimental results show that the hexagonal-fin heat sink, surface area is 25 \% more than circular fins, exhibited superior thermal performance without significant variation in input power. Notably, the hexagonal-fin heat sink achieved the desired set point temperature of 55 ◦C in 33 \% less time than the circular-fin design and 45 \% less time than the heat sink without fins. Furthermore, the peak temperatures increased up to 21 \% for circular fins. During the charging cycles, the enhancement ratios vary from 72 \% and begin to narrow to 25 \% during discharge cycles. The hexagonal-fin configuration also exhibited superior melting dynamics, completing the phase transition 44 \% faster at higher input power than the circular fins, and established a thermal deviation of nearly 51 \% less than finless heat sinks. These findings underscore the critical role of fin geometry and PCM integration in achieving uniform temperature distribution and improved energy storage efficiency. Overall, the hexagonal-fin heat sink with GR42 PCM shows strong potential as a passive cooling solution for low-power portable electronic devices.}, language = {en} } @techreport{PolklasWillekeLehmbrincketal.2025, author = {Polklas, Thomas and Willeke, Tobias and Lehmbrinck, Marc and Fomina, Anastasia and Maqueo Martinez, Manuel Ernesto and Oliveira Brito, Marcel}, title = {RoboFlexRobuste Turbomaschinen f{\"u}r den flexiblen Einsatz: Numerische und experimentelle Untersuchungen zu einem axial-radial Turbinendiffusor (AP 1.5); KI-basierte, modellpr{\"a}diktive Turbostrang-Regelung f{\"u}r einen energieoptimalen Betrieb (AP 4.2) (Abschlussbericht Verbundprojekt AG Turbo Teilvorhaben-Nr. 1.5 und 4.2)}, publisher = {Repositorium f{\"u}r Naturwissenschaften und Technik}, address = {Hannover}, doi = {10.34657/18643}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-57122}, pages = {137}, year = {2025}, abstract = {In der Zusammenarbeit zwischen dem ITSM der Universit{\"a}t Stuttgart und Everllence wurde im Rahmen dieses Vorhabens (AP 1.5) eine Versuchsanlage zur Erzeugung repr{\"a}sentativer Diffusorstr{\"o}mungen entwickelt und f{\"u}r experimentelle Untersuchungen eingesetzt. Begleitend zu den experimentellen Untersuchungen wurden verschiedene numerische Modelle entwickelt und anhand der Messergebnisse validiert. Aus diesem Vergleich wurden Empfehlungen zur numerischen Str{\"o}mungssimulation von Axial-Radial-Diffusoren abgeleitet. Insgesamt zeigte die numerische Simulation unter den gew{\"a}hlten Bedingungen eine hohe Sensitivit{\"a}t gegen{\"u}ber den Modellparametern mit entsprechenden Auswirkungen auf die beabsichtigte Geometrieoptimierung. In Arbeitspaket 4.2 des AG Turbo Verbundprojekts RoboFlex ist es den Projektpartnern Hochschule D{\"u}sseldorf und Everllence gelungen, eine modellpr{\"a}diktive Mehrgr{\"o}ßen-Verbundregelung eines exemplarischen Turbomaschinen-Strangs zu entwickeln. Dies erlaubt der Regelungseinheit, alle verf{\"u}gbaren Stellgr{\"o}ßen simultan zu benutzen, um ein vorgegebenes Regelungsziel zu erreichen. Zudem kann das Regelungsziel flexibel um weitere Vorgaben und Beschr{\"a}nkungen erweitert werden, indem diese in die Kostenfunktion implementiert werden. Ein zentraler Forschungsschwerpunkt war hierbei die Einbindung von Methoden der k{\"u}nstlichen Intelligenz in die Modellierung und im gleichen Zuge deren {\"U}berf{\"u}hrung und Implementierung in die linearisierte Modellform, die die modellpr{\"a}diktive Regelung verlangt. Ein besonderes Augenmerk wurde auf die fortlaufende Nachf{\"u}hrung des KI-Modells an den zuletzt durch Messungen bekannten Anlagenzustand gelegt.}, subject = {Str{\"o}mungsmaschine}, language = {de} } @article{OcakciNiemannDraghici2025, author = {Ocakci, Elif and Niemann, J{\"o}rg and Draghici, George}, title = {A Method to Evaluate the Life Cycle Sustainability Value of Alternative Solution Designs}, series = {Acta Technica Napocensis; Series: Applied Mathematics, Mechanics and Engineering}, volume = {68}, journal = {Acta Technica Napocensis; Series: Applied Mathematics, Mechanics and Engineering}, number = {1S}, publisher = {Technical University of Cluj-Napoca}, issn = {2393-2988}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:due62-opus-58290}, pages = {277 -- 284}, year = {2025}, abstract = {The paper focuses on developing an integrative methodology to evaluate environmental, economic, and social sustainability of alternative solution design options. Core approach is to extend the classic method of Quality Function Deployment (QFD) towards a holistic integrated model to overall evaluate the different aspects of all three pillars of sustainability (economy, ecology and social) across the product life cycle. The methods identify key aspects and allow users to consider and weigh different life cycle aspects in a overall scoring scheme.}, subject = {Nachhaltigkeit}, language = {en} }