TY - JOUR A1 - Biswas, Nirmalendu A1 - Mandal, Dipak Kumar A1 - Bose, Sharmistha A1 - Manna, Nirmal K. A1 - Benim, Ali Cemal T1 - Experimental Treatment of Solar Chimney Power Plant — A Comprehensive Review JF - Energies N2 - Solar chimney power plants (SCPPs) are encouraging sustainable energy sources due to their low cost, abundance, low maintenance, and eco-friendliness. However, despite significant efforts to optimize SCPP design, their efficiency and power generation capabilities remain limited. Researchers have explored modifications in plant geometry and hybridization to improve efficiency. Despite extensive work in this area, commercialization of SCPPs has not yet been achieved. Most of the research is numerical and may differ from real-world practical use. The number of experimental studies is also relatively small. To facilitate commercialization, further investigation with practical and feasible dimensions is required. This comprehensive review paper aims to provide an in-depth analysis of experimental approaches and advancements in the field of SCPPs. The paper begins with an introduction, highlighting the background, significance, and objectives of the review. It provides an overview of the plants, discussing their principles and operation as innovative renewable energy systems. The historical development and evolution of solar chimneys are explored, shedding light on their progression over time. Case studies of operational hybrid SCPPs are examined to showcase real-world applications and performance. The paper also addresses environmental impacts and sustainability considerations associated with SCPPs. Furthermore, recommendations for future research and development in this field are provided to guide researchers and industry professionals. This study focuses on the possibility of commercialization of both standalone and hybrid SCPPs. KW - Erneuerbare Energien KW - Aufwindkraftwerk KW - Nachhaltigkeit KW - Zukunftserwartung KW - renewable energy KW - solar chimney power plant KW - SCPP KW - experimental KW - hybrid system KW - environmental impact KW - sustainability KW - challenges KW - future perspectives Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-46139 SN - 1996-1073 VL - 16 IS - 17 PB - MDPI ER - TY - JOUR A1 - Köhler, Denis A1 - Boegel-Driessen, Josephine Alexandra A1 - Josupeit, Jan A1 - Issa-Keller, Sarah-Joelle A1 - Müller, Romina A1 - Stricker, Johannes T1 - Reliability and Validity of the Comprehensive Assessment of Psychopathic Personality—Self-Report—German Version (CAPP-SR-GV) in a German Non-Criminal Sample JF - Behavioral Sciences N2 - The structure of psychopathy is conceptualized differently in various models and no consensus has yet been reached. This study aimed to further clarify psychopathy’s content and structure by validating the German Comprehensive Assessment of Psychopathic Personality—Self-Report (CAPP-SR). For this purpose, we used a sample of n = 458 participants. The CAPP’s six factors were replicated in an exploratory factor analysis. Further confirmatory analysis revealed recommendations for optimizing the CAPP. Thus, both an optimized version and the original CAPP-SR were examined. The construct validity of both versions was then examined using a different self-rating instrument for psychopathy, the Triarchic Psychopathy Measure. The implications of the findings and further research directions are discussed. KW - CAPP KW - Psychopathie KW - Persönlichkeit KW - Comprehensive Assessment of Psychopathic Personality KW - CAPP-SR KW - psychopathy KW - TriPM KW - personality KW - FBSK_Webseite Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-46018 SN - 2076-328X VL - 14 IS - 9 PB - MDPI ER - TY - JOUR A1 - Stein, Nora A1 - Kursawe, Janet A1 - Köhler, Denis T1 - Contesting State-Led Patriarchy—The Drivers, Demands and Dynamics of Women’s Participation in the Gezi Uprisings in Turkey 2013 JF - Societies N2 - The Gezi Park protests in Istanbul (Türkiye) gained worldwide attention in 2013. Both men and women took part in the protests, which were heavily cracked down on by the government. The present study examined 273 Turkish women’s attitudes and motivations for taking part in the protests. The results show that the following variables had a significant impact on protest participation: lifestyle threats posed by religious values/norms and by the government; feelings of marginalization as a woman; political dissatisfaction; gender discrimination; and affiliations with feminism. Regarding the impact of attitudes on women’s political participation and discrimination, this study provides insights into the state of research on gender discrimination and feministic identity. KW - Gezi Park protest KW - gender discrimination KW - feministic identity KW - female participation KW - Gezi-Proteste KW - FBSK_Webseite Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-46020 SN - 2075-4698 VL - 13 IS - 12 PB - MDPI ER - TY - JOUR A1 - von Berg, Markus A1 - Himmelein, Hendrik A1 - Steffens, Jochen T1 - Effects of noise sensitivity and listening effort on perceptual ratings of background noise JF - JASA Express Letters N2 - Previous research suggests that noise sensitivity is related to inefficient auditory processing that might increase the mental load of noise and affect noise evaluation. This assumption was tested in an experiment using a dual-task paradigm with a visual primary task and an auditory secondary task. Results showed that participants' noise sensitivity was positively correlated with mental effort. Furthermore, mental effort mediated the effect of noise sensitivity on loudness and unpleasantness ratings. The results thus support the idea that noise sensitivity is related to increased mental effort and difficulties in filtering auditory information and that situational factors should be considered. KW - noise sensitivity KW - listening effort KW - Geräuschempfindlichkeit KW - Höranstrengung KW - HSD Publikationsfonds KW - DFG Publikationskosten Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-45747 SN - 2691-1191 N1 - Funding: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) – 532148125 und durch den zentralen Publikationsfonds der Hochschule Düsseldorf University of Applied Sciences. VL - 8 IS - 4 PB - AIP Publishing ER - TY - JOUR A1 - Mandal, Dipak Kumar A1 - Bose, Sharmistha A1 - Biswas, Nirmalendu A1 - Manna, Nirmal K. A1 - Cuce, Erdem A1 - Benim, Ali Cemal T1 - Solar Chimney Power Plants for Sustainable Air Quality Management Integrating Photocatalysis and Particulate Filtration: A Comprehensive Review JF - Sustainability N2 - Urban air pollution has become a pressing challenge in recent times, demanding innovative solutions. This review delves into the potential of Solar Chimney Power Plants (SCPPs) as a sustainable approach to mitigating air pollution. The idea of mitigation of pollution may be an added advantage to the use of SCPPs in practice. Recent advancements, such as the integration of photocatalytic reactors (PCRs) for the elimination of greenhouse gases (GHGs), emphasizing the importance of addressing non-CO2 GHGs like CH4 and N2O are analyzed. The novelty of this review is that it not only focuses on the shifting and removal of particulate matter but also on the removal of greenhouse gases. Numerous case studies, ranging from filter-equipped SCPPs to Solar-Assisted Large-Scale Cleaning Systems (SALSCSs), are reviewed, providing a comprehensive understanding of their design, performance, and potential benefits. This review serves as a guide for researchers and policymakers, emphasizing the need for multifaceted approaches to address the intricate nexus of air pollution, renewable energy generation, and climate change mitigation. KW - solar chimney KW - air pollution KW - greenhouse gases KW - particulate matter KW - photocatalysis KW - Luftverschmutzung KW - Photokatalyst KW - Treibhausgas KW - Feinstaub KW - Aufwindkraftwerk Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-45814 SN - 2071-1050 VL - 16 IS - 6 PB - MDPI ER - TY - JOUR A1 - Münch, Justin A1 - Priesmann, Jan A1 - Reich, Marius A1 - Tillmanns, Marius A1 - Praktiknjo, Aaron A1 - Adam, Mario T1 - Uplifting the Complexity of Analysis for Probabilistic Security of Electricity Supply Assessments using Artificial Neural Networks JF - Energy and AI N2 - The energy sector faces rapid decarbonisation and decision-makers demand reliable assessments of the security of electricity supply. For this, detailed simulation models with a high temporal and technological resolution are required. When confronted with increasing weather-dependent renewable energy generation, probabilistic simulation models have proven. The significant computational costs of calculating a scenario, however, limit the complexity of further analysis. Advances in code optimization as well as the use of computing clusters still lead to runtimes of up to eight hours per scenario. However ongoing research highlights that tailor-made approximations are potentially the key factor in further reducing computing time. Consequently, current research aims to provide a method for the rapid prediction of widely varying scenarios. In this work artificial neural networks (ANN) are trained and compared to approximate the system behavior of the probabilistic simulation model. To do so, information needs to be sampled from the probabilistic simulation in an efficient way. Because only a limited space in the whole design space of the 16 independent variables is of interest, a classification is developed. Finally it required only around 35 minutes to create the regression models, including sampling the design space, simulating the training data and training the ANNs. The resulting ANNs are able to predict all scenarios within the validity range of the regression model with a coefficient of determination of over 0.9998 for independent test data (1.051.200 data points). They need only a few milliseconds to predict one scenario, enabling in-depth analysis in a brief period of time. KW - Security of electricity supply KW - Probabilistic simulation KW - Metamodeling KW - Artificial neural networks KW - Regression KW - HSD Publikationsfonds KW - DFG Publikationskosten KW - KIVi Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-45359 SN - 2666-5468 N1 - Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - 532148125 and supported by the central publication fund of Hochschule Düsseldorf University of Applied Sciences. PB - Elsevier ER - TY - THES A1 - Thielen, Sven T1 - Investigating JackTrip's Software Architecture: A Case Study On Prominent Reasons For Architectural Erosion In Open Source Software Originating From Academia N2 - Sustainable software architecture is crucial for the success of an evolving system that is affected by its context and environment. However, deviations between software design and implementation are often uncontrolled and induce architectural erosion. The literature describes several symptoms and observes this phenomenon in open source software. Prominent reasons for the occurrence of architectural erosion include a rushed evolution, recurring changes, a lack of developers' awareness, time pressures, and the accumulation of design decisions. Architectural erosion is also prevalent in academic projects, but it still needs to be researched in-depth in a real-life setting. In this work, a single case study investigates the symptoms and reasons for architectural erosion in open source software originating from academia by employing a mixed-methods approach. Architectural metrics from a static code analysis using ARCADE Core are contrasted with developers' perspectives sourced from semistructured interviews. The investigated project is JackTrip, a cross-platform application for realtime networked music performances and Internet reverberation research. The first research question aims at assessing the trend of structural symptoms for architectural erosion in JackTrip. The results show a significant increase in link overload smells in the course of the evolution, which reached 11 as of version 1.6.2. This supports the developers' perception of a rushed evolution corresponding to the second research question, which asks to what extent prominent causes for architectural erosion apply. Additionally, the interview data evince time constraints related to tight research funding and the commercialization of the project. Research question 3 investigates how the academic environment and the problem domain relate to the symptoms and reasons for architecture erosion. It has been found that these influences shape the development approach and impact contributor selection. In relation to a certain inexperience and lack of commitment of open source developers as a reason for architectural erosion, the results suggest further studies and opt for ending the discussion regarding skills. Currently, the role of an architect or dedicated architectural work does not seem to be present in the JackTrip project. However, structural issues described in this work should not be considered as categorical statements about its software architecture as they would need to be confirmed on a code level. KW - Software Architecture KW - Architecture Erosion KW - Software Evolution KW - Academic Software KW - Open Source Software Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-44153 PB - Hochschule Düsseldorf CY - Düsseldorf ER - TY - JOUR A1 - Mandal, Dipak Kumar A1 - Biswas, Nirmalendu A1 - Manna, Nirmal K. A1 - Gayen, Dilip Kumar A1 - Benim, Ali Cemal T1 - An application of artificial neural network (ANN) for comparative performance assessment of solar chimney (SC) plant for green energy production JF - Scientific Reports N2 - This study aims to optimize the power generation of a conventional Manzanares solar chimney (SC) plant through strategic modifications to the collector inlet height, chimney diameter, and chimney divergence. Employing a finite volume-based solver for numerical analysis, we systematically scrutinize influential geometric parameters, including collector height (hi = 1.85 to 0.1 m), chimney inlet diameter (dch = 10.16 to 55.88 m), and chimney outlet diameter (do = 10.16 to 30.48 m). Our findings demonstrate that reducing the collector inlet height consistently leads to increased power output. The optimal collector inlet height of hi = 0.2 m results in a significant power increase from 51 to 117.42 kW (~ 2.3 times) without additional installation costs, accompanied by an efficiency of 0.25%. Conversely, enlarging the chimney diameter decreases the chimney base velocity and suction pressure. However, as turbine-driven power generation rises, the flow becomes stagnant beyond a chimney diameter of 45.72 m. At this point, power generation reaches 209 kW, nearly four times greater than the Manzanares plant, with an efficiency of 0.44%. Nevertheless, the cost of expanding the chimney diameter is substantial. Furthermore, the impact of chimney divergence is evident, with power generation, collector efficiency, overall efficiency, and collector inlet velocity all peaking at an outer chimney diameter of 15.24 m (corresponding to an area ratio of 2.25). At this configuration, power generation increases to 75.91 kW, approximately 1.5 times more than the initial design. Remarkably, at a low collector inlet height of 0.2 m, combining it with a chimney diameter of 4.5 times the chimney inlet diameter (4.5dch) results in an impressive power output of 635.02 kW, signifying a substantial 12.45-fold increase. To model the performance under these diverse conditions, an artificial neural network (ANN) is effectively utilized. KW - HSD Publikationsfonds KW - DFG Publikationskosten Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-45190 SN - 2045-2322 N1 - Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - 532148125 and supported by the central publication fund of Hochschule Düsseldorf University of Applied Sciences VL - 14 IS - 1 PB - Springer Nature ER - TY - JOUR A1 - Kretschmar, Dominik A1 - Schmieder, Matthias A1 - Niemann, Jörg T1 - Knowledge Management Concept to Compensate a High Employee Fluctuation JF - Acta Technica Napocensis. Series: Applied Mathematics, Mechanics and Engineering N2 - Knowledge is our most valuable asset! Due to the increasing fluctuation caused by demographic change, the change in society and the industry, companies are increasingly confronted with knowledge management. Therefore, companies have problems with carrying out projects effectively. There are several models, methods and tools to develop an effective concept for knowledge management. Can the process capability of projects be ensured despite high fluctuation? What appropriate methods and tools are available to manage knowledge? These and more questions are clarified in the course of this work and presented in a conceptual proposal. KW - knowledge management KW - Wissensmanagement KW - project management KW - Projektmanagement KW - collaboration KW - Kollaboration Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-44818 UR - https://atna-mam.utcluj.ro/index.php/Acta/article/view/1031 VL - 61 IS - III SP - 483 EP - 488 ER - TY - JOUR A1 - Barbashov, Maksim A1 - Gellings, Markus A1 - Özen, Semih A1 - Jahr, Andreas T1 - High-speed wear tests on mower blade from various manufactures using the wear pot methode JF - Agricultural engineering.eu N2 - Rotary mowers are ofen used for forage harvesting in agriculture, as this technology can achieve a high throughput. These knives are therefore exposed to high levels of wear and tear, and will also be ofen changed because of loss of material by bad cutting quality. Thatn is why it is interesting to save costs during manufacturing in spite of a correspondingly long service life. This research records the current manufacturing quality of the mower blades and examines how they behave in comparison. Based on the obtained results, further decisions on the methods, procedures and ways of extending the life of the disc mower blades should be proposed. For the investigations, a test bench based on a wear pot was used. The wear that occurs on the blade is determined using several parameters and compared accordingly. The parameters of the test setup determined as a result of the test can be used for further studies of wear resistance. N2 - Bei der Grünfutterernte in der Landwirtschaft werden häufig Scheibenmähwerke eingesetzt, um einen hohen Durchsatz zu erzielen. Die dabei eingesetzten Messer sind einem hohen Verschleiß ausgesetzt und werden häufig wegen Verschleiß gewechselt, was sich in einer schlechten Schnittqualität widerspiegelt. Daher ist es interessant, bereits im Produktionsprozess Kosten einzusparen, ohne dabei die Lebensdauer der Messer zu beeinträchtigen. Diese Studie erfasst die aktuelle Fertigungsqualität von Mähmessern und untersucht, wie sie sich im Vergleich verhalten. Anhand der Ergebnisse sollen weitere Entscheidungen über Methoden, Verfahren und Wege zur Verlängerung der Lebensdauer von Rotorklingen vorgeschlagen werden. Für die Untersuchungen wurde ein Prüfstand auf der Basis des Verschleißtopfverfahrens verwendet. Der am Messer auftretende Verschleiß wird anhand mehrerer Parameter ermittelt und entsprechend verglichen. Die aus den Untersuchungen gewonnenen Parameter können für weiterführende Verschleißuntersuchungen genutzt werden. KW - Disc mower blades KW - rotary mower KW - slurry pot KW - ellipse-fit method Y1 - 2024 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-44709 SN - 2943-5641 VL - 79 IS - 2 SP - 95 EP - 115 PB - Kuratorium für Technik und Bauwesen in der Landwirtschaft e. V. (KTBL) ER -