Hochschule Bonn-Rhein-Sieg
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Unraveling capacity fading in lithium-ion batteries using advanced cyclic tests: A real-world approach
No full textBattery lifespan estimation is essential for effective battery management systems, aiding users and manufacturers in strategic planning. However, accurately estimating battery capacity is complex, owing to diverse capacity fading phenomena tied to factors such as temperature, charge-discharge rate, and rest period duration. In this work, we present an innovative approach that integrates real-world driving behaviors into cyclic testing. Unlike conventional methods that lack rest periods and involve fixed charge-discharge rates, our approach involves 1000 unique test cycles tailored to specific objectives and applications, capturing the nuanced effects of temperature, charge-discharge rate, and rest duration on capacity fading. This yields comprehensive insights into cell-level battery degradation, unveiling growth patterns of the solid electrolyte interface (SEI) layer and lithium plating, influenced by cyclic test parameters. The results yield critical empirical relations for evaluating capacity fading under specific testing conditions
One Health as an Integrated Approach: Perspectives from Public Services for Mitigation of Future Epidemics
No full textTREE Jahresbericht 2021/2022: Forschung für die Zukunft
No full textDas Institut TREE freut sich, ihnen den Jahresbericht der Jahre 2021 und 2022 präsentieren zu können. Blicken sie mit uns zurück auf zwei herausfordernde Jahre.
Unser neuer Doppel-Jahresbericht 2021/2022 enthält viele, interessante, Beiträgen unserer spannenden, interdisziplinären Forschungprojekte der Bereiche Energie, Modellbildung Simulation, Drohnenforschung, Materialien und Prozesse und Technikkommunikation
Distribution Channel Strategies and Customer Choice in the Fast-Moving Consumer Goods Industry: A Case Study in the Upper East Region, Ghana
No full textChannels of distribution are important factors in the connection between goods and services produced for the final consumer and, therefore, determine the effectiveness with which they are delivered and ultimately availed to the final consumers. Globally, studies show that channels of distribution and sales play an essential role in building bonds between manufacturers, retailers, wholesalers and their consumers. The main purpose of this study is to examine the influence of distribution channels and networks on customer choice of fast-moving consumer goods (FCMG) in the Upper East Region of Ghana. The study adopted a quantitative approach and questionnaires were used to collect primary data from 110 customers of Unilever Ghana Limited in the Upper East Region of Ghana. The findings reveal that product-related factors, such as the price of products, perishability of products, size and weight of products, promote the effective distribution of Unilever goods and services, whilst consumer-related factors, such as the number of customers and increased consumer base, promote effective distribution channels. The study also established a positive influence of factors, such as incentives, receiving feedback and sales performance, on customer choice of fast-moving consumer goods (FMCG). Managers and producers in the FMCGs industry should implement reward and incentive programmes and policies to boost the sale and distribution of fast-moving consumer goods and services in the retail industry in Ghana
Universities, Entrepreneurship and Enterprise Development in Africa – Conference Proceedings 2022: International Conference, 8 – 9 September 2022 of the Building Expertise and Training for Growth in the consumer goods and food processing industry in Ghana platform (BET Ghana)
No full textThese proceedings are the outcome of the 10th annual joint conference on "Universities Entrepreneurship and Enterprise Development in Africa".
These proceedings document the culmination of the 10th annual joint conference on "Universities, Entrepreneurship and Enterprise Development in Africa," which was held on the 8th and 9th of September 2022 at the Campus Sankt Augustin, Hochschule Bonn-Rhein-Sieg University of Applied Sciences. The conference was a collaboration between the University of Cape Coast, Ghana, and Hochschule Bonn-Rhein-Sieg University of Applied Sciences, Germany
Document-to-document relevance assessment for TREC Genomics Track 2005
No full textHere we present a doc-2-doc relevance assessment performed on a subset of the TREC Genomics Track 2005 collection. Our approach includes an experimental set up to manually assess doc-2-doc relevance and the corresponding analysis done on the results obtained from this experiment. The experiment takes one document as a reference and assesses a second document regarding its relevance to the reference one. The consistency of the assessments done by 4 domain experts was evaluated. The lack of agreement between annotators may be due to: i) The abstract lacks key information and/or ii) Lack of experience of the annotators in the evaluation of some topics
Der Umgang mit Präsentismus an Hochschulen – Literaturreview und erste Handlungsempfehlungen
No full text„Ich kann jetzt nicht krank werden – ich muss arbeiten“. Diesen Satz hat wohl jeder schon einmal gehört oder sogar selbst gesagt. Dahinter steckt das Phänomen des Präsentismus. Präsentismus wird ganz allgemein bezeichnet als behaviour of working in the state of illhealth (Ruhle et al. 2020). Der Begriff entstand in Anlehnung an sein Gegenteil, den Absentismus, welcher das Fernbleiben von der Arbeit beschreibt (Hägerbäumer 2017). Die negativen langfristigen gesundheitlichen und arbeitsbezogenen Auswirkungen des Verhaltens, trotz Krankheit zu arbeiten, sind in der Literatur gut belegt (z.B. Gustafsson/Marklund 2011). Vor allem im Home-Office, welches während der Corona-Pandemie häufig genutzt wurde und nach der Corona-Pandemie in vielen Bereichen Normalität wurde, tritt Präsentismus aufgrund der geringeren Barrieren (z.B. keine Ansteckungsgefahr, kein Pendeln) noch verstärkter auf (Steidelmüller et al. 2020). Auch bei Studierenden, die im Rahmen von Online-Lehre öfter von zu Hause aus lernen, ist davon auszugehen, dass dies den Präsentismus begünstigt. Eine Auseinandersetzung mit dem Thema ist also von großer Relevanz. Es fehlt eine strukturierte Zusammenstellung geeigneter Gegenmaßnahmen, die zur Reduzierung von Präsentismus angewendet werden können. Darüber hinaus wurde vor allem Präsentismus mit dem Schwerpunkt Hochschule und damit den Zielgruppen Hochschulmitarbeitende und Studierende bisher kaum untersucht. Diese Forschungslücke soll der vorliegende Beitrag schließen und Präsentismus an Hochschulen beschreiben sowie mithilfe eines Literaturreviews mögliche Maßnahmenbereiche aufzeigen
Knowledge Base Question Answering by Transformer-Based Graph Pattern Scoring
No full textQuestion Answering (QA) has gained significant attention in recent years, with transformer-based models improving natural language processing. However, issues of explainability remain, as it is difficult to determine whether an answer is based on a true fact or a hallucination. Knowledge-based question answering (KBQA) methods can address this problem by retrieving answers from a knowledge graph. This paper proposes a hybrid approach to KBQA called FRED, which combines pattern-based entity retrieval with a transformer-based question encoder. The method uses an evolutionary approach to learn SPARQL patterns, which retrieve candidate entities from a knowledge base. The transformer-based regressor is then trained to estimate each pattern’s expected F1 score for answering the question, resulting in a ranking ofcandidate entities. Unlike other approaches, FRED can attribute results to learned SPARQL patterns, making them more interpretable. The method is evaluated on two datasets and yields MAP scores of up to 73 percent, with the transformer-based interpretation falling only 4 pp short of an oracle run. Additionally, the learned patterns successfully complement manually generated ones and generalize well to novel questions