TY - JOUR A1 - Shajahan, Mohamed Iqbal A1 - Benim, Ali Cemal T1 - Granular PCM based heat sink for electronics thermal management JF - Applied Thermal Engineering N2 - 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. KW - Heat sinks KW - Portable electronic cooling KW - Latent heat storage KW - GR42 PCM KW - Hexagonal fin KW - Circular fin KW - HSD Publikationsfonds KW - DFG Publikationskosten Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-59649 SN - 1359-4311 VL - 286 PB - Elsevier ER - TY - JOUR A1 - Sulaiman, Mohammed A. A1 - Saber, Hindren Ali A1 - Hasan, Hasan F. A1 - Benim, Ali Cemal T1 - Latent heat cold storage integrated direct evaporative cooler: A neoteric practical design for energy and water saving potential with thermal comfort improvement JF - Journal of Energy Storage KW - Latentwärmespeicher KW - Verdunstungskühlung KW - Energieeinsparung KW - Wassereinsparung Y1 - 2026 U6 - https://doi.org/10.1016/j.est.2025.119612 SN - 2352-152X VL - 143 PB - Elsevier ER - TY - JOUR A1 - Mandal, Dipak Kumar A1 - Manna, Nirmal K. A1 - Biswas, Nirmalendu A1 - Rudra, Tansu A1 - Kumar, Rajesh A1 - Benim, Ali Cemal T1 - Enhanced heat transport in magneto-nanofluidic thermal systems: adiabatic block effects in grooved channels and ANN modeling JF - International Journal of Thermofluids N2 - 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. KW - Mixed convective flow KW - Nanofluids KW - Heat transfer augmentation KW - Adiabatic block KW - Grooved channel KW - Neural network KW - HSD Publikationsfonds Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-60127 SN - 2666-2027 VL - 31 PB - Elsevier ER - TY - JOUR A1 - Bergmann, Marie A1 - Haddad-Thoelke, Pascale A1 - Jeong, Haeran A1 - Kappeler, Ron A1 - Altug, Hicran A1 - Oberwinster, Lukas A1 - Boogaard, Hanna A1 - Pohl, Tobias A1 - Soppa, Vanessa A1 - Ogurtsova, Katherine A1 - Joss, Meltem Kutlar A1 - Andersen, Zorana Jovanovic A1 - Hoffmann, Barbara T1 - Systematic review and meta-analysis on the health effects of long-term exposure to ultrafine particles JF - European Respiratory Review N2 - 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. KW - Luftreinhaltung KW - Schadstoffbelastung KW - Luftverunreinigender Stoff KW - Feinstaub KW - Auswirkung Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-60272 SN - 1600-0617 VL - 35 IS - 179 PB - European Respiratory Society ER - TY - GEN T1 - 1045 - Vierte Satzung zur Änderung der Prüfungsordnung für den Masterstudiengang „Umweltingenieurwesen“ an der Hochschule Düsseldorf vom 18.02.2026 N2 - Aufgrund der §§ 2 Abs. 4, 64 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz - HG) vom 16.09.2014 (GV. NRW. S. 547) in der aktuell gültigen Fassung hat die Hochschule Düsseldorf die folgende Ordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 1045 KW - Amtliche Mitteilungen Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-60857 CY - Düsseldorf ER - TY - GEN T1 - 1044 - Erste Satzung zur Änderung der Prüfungsordnung für den Bachelorstudiengang Haus-, Energie- und Anlagentechnik (HEAT) an der Hochschule Düsseldorf vom 18.02.2026 N2 - Aufgrund der §§ 2 Abs. 4, 64 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz - HG) vom 16.09.2014 (GV. NRW. S. 547) in der aktuell gültigen Fassung hat die Hochschule Düsseldorf die folgende Ordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 1044 KW - Amtliche Mitteilungen Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-60846 CY - Düsseldorf ER - TY - INPR A1 - Deckert, Carsten A1 - Schomaker, Rahel M. A1 - Grasmik, Jeanna T1 - Universalism and Innovation: The Influence of Impartiality and Inclusiveness on National Innovativeness T2 - Queios N2 - The innovative capacity of a country is a key factor in its economic development. While classical approaches primarily emphasize technological and economic aspects, cultural and moral influences are increasingly coming into focus in research. In particular, the treatment of out-groups and the intensity of in-group preferences play a crucial role, as expressed in the societal contrast between social cohesion and individual freedom. A central aspect of this debate is the moral dimension, particularly the tension between universalism, relativism, and particularism. This study examines the impact of universalism on a country's innovativeness by situating the concept within cultural theory and analyzing it empirically. The findings provide new insights into the relationship between cultural values and innovation potential with regard to moral capital in a society. Y1 - 2026 U6 - https://doi.org/10.32388/KNI4FN PB - Qeios Ltd ER - TY - JOUR A1 - S, Kasiviswanathan A1 - Shajahan, Mohamed Iqbal A1 - R, Bharathiraja A1 - Murali, Arun Prasad A1 - Benim, Ali Cemal T1 - Comprehensive overview of phase change materials in electronics, building, and solar applications JF - Engineering Research Express N2 - Phase change materials (PCMs) are a viable way to improve energy efficiency and thermal control in a variety of sectors. With an emphasis on their function in thermal control, this review article offers an in-depth review of PCM applications in electronics, buildings and solar energy systems. PCMs are used in electronics to control device temperatures, which lowers the risk of overheating and increases operational efficiency by 10% to 25%. Through latent heat storage and release in reaction to temperature changes, PCMs are incorporated into walls, floors, and roofs in building applications to improve thermal comfort and cut energy use by 15% to 30%. By storing thermal energy for steady power generation, PCMs increase the dependability and efficiency of solar energy systems by 8%–20%. This review examines the basic ideas behind PCMs, assesses various PCM (such as organic, inorganic, and eutectic PCMs), and details about real-world applications in these energy management fields. Important issues are examined, such as material compatibility, cost-effectiveness, and long-term stability. In order to maximize performance in these crucial applications, the conclusion emphasizes the need for improvements in cost-effective PCM formulations for the improved thermal conductivity (0.2–0.7 W m−1·K−1), and adaptive control systems. KW - Energieeffizienz KW - Temperaturregelung KW - Elektronik KW - Latentwärmespeicher KW - Sonnenenergie Y1 - 2026 U6 - https://doi.org/10.1088/2631-8695/ae342a SN - 2631-8695 VL - 8 IS - 3 PB - IOP Publishing ER - TY - THES A1 - Münch, Justin T1 - Mehrwert von Methoden des Maschinellen Lernens für die simulative Bewertung der Versorgungssicherheit mit Elektrizität N2 - Politik und Wirtschaft sind auf eine fundierte, schnelle und flexible Bewertung der Ver-sorgungssicherheit mit Elektrizität als Grundlage strategischer Entscheidungen angewiesen. Dazu werden komplexe probabilistische Simulationsmodelle unter Einbeziehung einer hohen Anzahl möglicher Zukunftsszenarien verwendet. Allerdings schränken die langen Rechenlaufzeiten von mehreren Stunden pro Szenario die Analysetiefe ein. Zudem werden die Analysen durch die Prognose der zeitlich aufgelösten zukünftigen 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 Elektrizität 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 aufgelöster 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 Elektrizität komplexitätsgerecht (tausende von Zukunftsszenarien) in praktikabel kurzer Zeit (weniger als eine Stunde) detailliert zu analysieren. N2 - Politics and economics rely on a well-founded, rapid and flexible assessment of electricity supply security as a basis for strategic decisions. Complex probabilistic simulation models incorporating a large number of possible future scenarios are used for this purpose. However, the long simulation runtimes of several hours per scenario limit the depth of analysis. In addition, the analyses are complicated by the forecasting of time-resolved future boundary conditions. This work demonstrates that machine learning (ML) methods, combined with adapted Design of Experiments (DoE) techniques, allow for a highly accurate approximation of electricity supply security metrics obtained from a complex simulation model based on recursive convolutions. The time reduction compared to the native simulation model is very high, while maintaining a high degree of accuracy. In the area of forecasting time-resolved boundary conditions, the results also demonstrate that ML methods offer considerable potential for improvement over classical methods. In summary, the investigated and proposed ML methods are capable of performing a detailed analysis of the security of electricity supply that is commensurate with its complexity (thousands of future scenarios) within a practical amount of time (less than an hour). T3 - Promotionskolleg NRW mit Hochschule Düsseldorf - 1 KW - Deep Learning KW - Machine Learning KW - Artificial neural networks KW - Metamodeling KW - Surrogate modeling KW - Probabilistic simulation KW - Regression KW - Security of electricity supply KW - times series forecasting Y1 - 2026 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-58306 N1 - Bochum, Dissertation, Promotionskolleg NRW mit Hochschule Düsseldorf PB - Hochschule Düsseldorf CY - Düsseldorf ER - TY - JOUR A1 - Çiçek, Aydın A1 - Koçyiğit, Ali T1 - Episodic evolution and active tectonics of the Karamık Graben in the apex of Isparta Angle, SW Türkiye JF - Mediterranean Geoscience Reviews KW - Neotektonik KW - Verwerfung KW - Kurve von Isparta KW - Karamık Graben KW - Anatolien Y1 - 2025 U6 - https://doi.org/10.1007/s42990-024-00151-5 SN - 2661-863X PB - Springer Nature ER - TY - RPRT A1 - Deckert, Carsten A1 - Keller, Laurenz A1 - König, Steffen A1 - Lux, Tim A1 - Möhle, Norbert T1 - Der Kreativität Raum geben: Konzeptionierung und Umsetzung eines hybriden Innovation Space T3 - Working Papers in Industrial Engineering - 7 Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-50134 SN - 2627-8375 PB - Hochschule Düsseldorf CY - Düsseldorf ER - TY - JOUR A1 - Deckert, Carsten A1 - Schomaker, Rahel M. A1 - Aydogan, Manolya T1 - Leistung, Ansehen und Muße: Der Einfluss der Leistungsorientierung auf die nationale Innovationfähigkeit JF - Ideen- und Innovationsmanagement N2 - Die Leistungsfähigkeit einer Gesellschaft spielt eine entscheidende Rolle für ihre Wachstumsmöglichkeiten. Zentrale Figur ist dabei der Entrepreneur, welcher durch seine Eigenschaften in Bezug auf Risikobereitschaft, Verantwortungsübernahme oder Ergebnisorientierung innovativ tätig ist und somit das Wirtschaftswachstum vorantreibt. Der vorliegende Beitrag untersucht, wie Leistungsorientierung und Innovationsfähigkeit auf nationaler Ebene miteinander verbunden sind. Zunächst wird Leistungsorientierung im Kontext der Kulturforschung eingeordnet. Anschließend wird deraktuelle Stand der Forschung zum Zusammenhang zwischen Leistungsorientierung und Innovationskraft reflektiert. Im weiteren Verlauf erfolgt die Diskussion eigener empirischer Ergebnisse mit Fokus auf die Kulturdimension „Achievement versus Ascription“ (Leistung contra Ansehen), bevor ein Fazit über den Einfluss von Leistung im Hinblick auf Ansehen und Muße gezogen wird. Y1 - 2025 U6 - https://doi.org/10.37307/j.2198-3151.2025.01.03 SN - 2198-3143 IS - 1 PB - Erich Schmidt Verlag ER - TY - JOUR A1 - Deckert, Carsten A1 - Abu-Tair, Meera A1 - Remmler, Julian A1 - Maxisch, Stefan T1 - Messung der Ingenieurkreativität JF - Ideen- und Innovationsmanagement Y1 - 2025 U6 - https://doi.org/10.37307/j.2198-3151.2024.04.03 SN - 2198-3151 IS - 4 PB - Erich Schmidt Verlag ER - TY - CHAP A1 - Deckert, Carsten A1 - Schomaker, Rahel M. T1 - Soziale Innovation als Treiber für eine menschenwürdige Gesellschaft T2 - Globale Ziele für nachhaltige Entwicklung Y1 - 2025 SN - 9783662683279 U6 - https://doi.org/10.1007/978-3-662-68327-9_5-1 SN - 2731-9849 SP - 1 EP - 14 PB - Springer Nature CY - Berlin, Heidelberg ER - TY - GEN T1 - 1010 - Prüfungsordnung für den Bachelorstudiengang Haus-, Energie- und Anlagentechnik (HEAT) an der Hochschule Düsseldorf vom 12.06.2025 N2 - Aufgrund der §§ 2 Abs. 4, 64 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz - HG) vom 16.09.2014 (GV. NRW. S. 547) in der aktuell gültigen Fassung hat die Hochschule Düsseldorf die folgende studiengangspezifische Prüfungsordnung als Satzung erlassen. Diese Prüfungsordnung gilt nur in Verbindung mit der Rahmenprüfungsordnung des Fachbereichs Maschinenbau und Verfahrenstechnik der Hochschule Düsseldorf (RahmenPO) vom 15.02.2016 in der jeweils gültigen Fassung. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 1010 Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-54118 CY - Düsseldorf ER - TY - GEN T1 - 1009 - Fünfte Satzung zur Änderung der Rahmenprüfungsordnung für den Fachbereich Maschinenbau und Verfahrenstechnik an der Hochschule Düsseldorf vom 12.06.2025 N2 - Aufgrund der §§ 2 Abs. 4, 64 Abs. 1 des Gesetzes über die Hochschulen des Landes Nordrhein-Westfalen (Hochschulgesetz - HG) vom 6.09.2014 (GV. NRW. S. 547) in der aktuell gültigen Fassung hat die Hochschule Düsseldorf die folgende Ordnung als Satzung erlassen. T3 - Amtliche Mitteilungen : Verkündungsblatt der Hochschule Düsseldorf - 1009 KW - Amtliche Mitteilungen Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-54102 CY - Düsseldorf ER - TY - INPR A1 - Deckert, Carsten A1 - Schomaker, Rahel A1 - Albiez, Philipp T1 - Social Capital and National Innovativeness – The Influence of Trust and Tolerance on the National Capacity to Innovate T2 - Qeios N2 - While national innovativeness is of pivotal relevance for economic development, so far, relatively little attention has been paid to the social drivers of innovativeness. Thus, the role of social norms and values as drivers of innovativeness is somewhat blurry. Tackling this gap, the article at hand reflects the concepts of social capital, trust, and tolerance, before a model of social capital and innovativeness is developed and tested empirically, followed by the presentation and discussion of the results and a brief conclusion. KW - Innovationsfähigkeit KW - Norm (Ethik) KW - Wert KW - Soziales Kapital KW - Vertrauen KW - Toleranz Y1 - 2025 U6 - https://doi.org/10.32388/646CQI SN - 2632-3834 PB - Qeios ER - TY - CHAP A1 - Lippel, Jens A1 - Bihlmeier, Richard A1 - Stuhlsatz, André T1 - A Computer Vision Approach to Fertilizer Detection and Classification T2 - Proceedings of the 20th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications KW - Maschinelles Lernen KW - Maschinelles Sehen KW - Landwirtschaft KW - Düngemittel Y1 - 2025 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-54735 SP - 563 EP - 569 PB - SCITEPRESS - Science and Technology Publications ER - TY - JOUR A1 - Sulaiman, Mohammed A. A1 - Saber, Hindren Ali A1 - Hasan, Hasan F. A1 - Benim, Ali Cemal T1 - Experimental and numerical investigation of novel dew-point evaporative cooler with shell and tube design JF - Energy KW - Numerische Strömungssimulation KW - Kühlung Y1 - 2025 U6 - https://doi.org/10.1016/j.energy.2025.134686 SN - 0360-5442 VL - 317 PB - Elsevier ER - TY - JOUR A1 - Vishwakarma, Devendra Kumar A1 - Bhattacharyya, Suvanjan A1 - Soni, Manoj Kumar A1 - Benim, Ali Cemal T1 - Transitional Mixed Convection in Inclined Solar Air Heater Tube with Wavy Inserts JF - Heat Transfer Engineering KW - Numerische Strömungssimulation KW - Sonnenenergie KW - Konvektion Y1 - 2025 U6 - https://doi.org/10.1080/01457632.2025.2480906 SN - 0145-7632 PB - Informa ER -